JP2009034482A - Heating element and manufacturing method of heating element - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide heating elements which are excellent in start heat generation, are thin, are soft before heat generation, during heat generation and after the end of heat generation, that is before use, during use and after use, are excellent in attachment to a body to be heated, are non-repulsive, are excellent in a wearing feeling, have practical flexibility and are in various shapes and various sizes, and a manufacturing method of the heating elements. <P>SOLUTION: The heating element has at least partially air-permeable storage body in which a water-containing exothermic composition whose essential components are iron powder, a carbon component, a reaction accelerator and water, while the excess water value is 0, and start temperature rising speed is equal to or higher than 12°C/5 minutes, and a plurality of section exothermic part area and sectioning parts are integrated. The section exothermic parts storing the water-containing exothermic composition and the sectioning parts which are hinges are integrated; air permeability is at least partially provided, the loop stiffness of at least one in the longitudinal direction crossing the section exothermic part area and the sectioning part of the storage body is ≤700mN/cm, and the heating element has flexibility based on a structural flexible function and a joint flexible function. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heating element that utilizes the heat generated by the oxidation reaction between oxygen in the air and iron powder, and is particularly thin, before heating, during heating, after heating, that is, before use, during use, and after use. The present invention relates to a heating element that is flexible, has good conformity to a body to be heated, has no resilience, has a good wearing feeling and a good touch, and has practical flexibility, and a method for manufacturing the heating element.

  Conventionally, heating elements such as iron powder, activated carbon, reaction accelerators (inorganic electrolytes, etc.), water, and heat generating compositions that generate heat when in contact with oxygen in the air are stored in a breathable storage body. Widely used. The general structure of these heating elements is a wet powder heating composition mixed with metal powder, activated carbon, a reaction accelerator (inorganic electrolyte, etc.), water, etc. that generates heat upon contact with oxygen in the air. However, it is housed in a breathable flat bag to form a heating element. In addition to being used as a heating tool for heating against cold, etc., it is also used as a thermal treatment tool for stiff shoulders, neuralgia, muscle pain, etc. Since it has the effect that blood circulation is promoted and muscle pain is relieved, it is widely used as a simple blood circulation promoting treatment tool.

 Patent Document 1 proposes that the pressure-sensitive adhesive layer has an area of 30 to 70% as a direct-paste re-heating element for the purpose of preventing itching and rash on the skin when it is applied directly to the skin. Has been. Furthermore, as a heating element that improves heat transfer from the heating element to the body in the type heating element to be affixed, the heating element has been made lighter and thinner, the one side of the flat bag has air permeability and the other side A heating element has also been developed in which an adhesive portion is provided and the surface of the adhesive portion is directly attached to the skin. In addition, a heating element having a moisture-containing gel layer attached to the skin instead of the adhesive portion is also disclosed.

  Patent Literature 2 and Patent Literature 3 disclose a packaging material using a nonwoven fabric using specific fibers, which is excellent in stretchability and has a soft feel.

As a heating element that improves the wearability and the like, a sheet-like heating element described in Patent Document 4 has been proposed. As a usage form of the sheet-like heating element, a form is disclosed in which the heating element is accommodated in a breathable container and pressed against or attached to a part of the body.
Further, a sheet-like heating element described in Patent Document 5 below is disclosed.
In addition, the heating element described in Patent Document 6 below also discloses a heating element in which the bending resistance, which is an index of flexibility, is set to a specific value.

JP-A-9-557 JP 2003-204983 A JP 11-89869 A Japanese Patent No. 2572621 JP-A-2005-58744 International Publication No. 2006/006654 Pamphlet

These exothermic bodies lose their flexibility as the exothermic reaction proceeds and iron powder becomes a lump. Therefore, when used for a long time, the entire heating element becomes gradually harder and uncomfortable. In addition, in order to reduce the minimum bending resistance, other heating elements have to store a large amount of the heating composition in the storage portion of the heating composition, resulting in a heating element with large unevenness, causing a sense of incongruity. It was.
In addition, the flexibility of the individual packaging material and the flexibility of the heating element as a whole are different. Even if the flexibility of the individual packaging material was improved, the flexibility of the thin heating element as a whole was not improved. .

  From the above, it has good heat build-up, is easy to wear, is thin and excellent in flexibility, has a good fit and feel, and is flexible before, during and after the heat generation of the heating element. The heat does not change and has an excellent thermal effect, but it is highly safe, can efficiently transfer the heat of the heating element to the body, can maintain stable heat generation characteristics, Peeling does not occur easily, adhesiveness is not lost easily, conformity to a heated body is good, non-repulsive, good fit and feel, practical flexibility, various types The purpose of the present invention is to provide a heating element that meets the application and needs.

As a result of intensive studies to solve these problems, the present inventor has reached the present invention.
That is, the heating element of the present invention is as described in claim 1.
A water-containing heat-generating composition having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more, and a plurality of divided heat-generating part regions And the section is integrated, and at least a part is provided with a breathable storage body, a section heating section that is a section heating section in which the water-containing heating composition is stored, and a non-storage area of the heating composition, A partitioning portion that is a hinge is integrated, a plurality of partition heating portions are provided at intervals with the partitioning portion as an interval, and at least a part has air permeability, and the partition heating portion region and the partitioning portion of the storage body At least one loop stiffness in the longitudinal direction across the surface is 700 mN / cm or less, and has a flexibility based on a structural flexibility function and an articulation flexibility function.
The heating element according to claim 2 is the heating element according to claim 1,
At least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the container is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more. Yes, the elongation at break at 25 ° C. is 5% or more.
The heating element according to claim 3 is the heating element according to claim 1 or 2,
At least one loop stiffness in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body is 700 mN / cm or less, and the loop stiffness of at least one of the divided portions is 700 mN / cm or less. .
The heating element according to claim 4 is the heating element according to claims 1 to 3,
At least one loop stiffness in the longitudinal direction across the section heating portion region and the section that is the seal region of the container is 700 mN / cm or less, and intermittent cuts are made in at least a partial region of the section. It is provided.
The heating element according to claim 5 is the heating element according to claims 1 to 4,
At least one loop stiffness in the longitudinal direction across the section heat generating area of the container and the section that is the seal area is 700 mN / cm or less, and at least a part of each section heat generating section is covered with a local ventilation material; It has a space surrounded by the ventilation side of the segmental heat generating part, the segmented part and the local ventilation material, and at least the side ventilation part facing the space part of the segmented heat generating part is ventilated to the heat generating composition. To do.
A heating element according to claim 6 is the heating element according to any one of claims 1 to 5,
At least one loop stiffness in the longitudinal direction across the section heating portion area of the storage body and the section that is a seal area is 700 mN / cm or less, the heating element has a minimum bending resistance of 70 mm or less, and the minimum bending resistance A heating element having a degree of change of −95 to 0 and having flexibility based on a structural flexible function and an articulated flexible function is manufactured.
The heating element according to claim 7 is the heating element according to claim 1,
The heating element having the water-containing heating composition is a segment heating part heating element, a rigid and soft heating element, a stripe heating element, a detachable heating element, an expansion heating element, a band heating element, a tunnel ventilation heating element, a drug heating element, and a detachable heating element. Tunnel aeration heating element, separable medicine heating element, eye temperature heating element, face temperature heating element, outer temporary folding heating element with outer bag, the hydrous heating composition is iron powder, carbon component, A reaction accelerator, water as an essential component, an excess water value of 0, a rising temperature rising rate of 12 ° C./5 minutes or more, and a divided heat generating region and a seal region of the housing constituting the heat generating member At least one loop stiffness across the section is 700 mN / cm or less, and at least one of the sections has a maximum tensile strength at 25 ° C. of 20 g / mm width or more. , And elongation at break of 5% or more at 25 ° C., the minimum bending resistance of the heating element is not more 70mm or less, the minimum bending resistance difference is equal to or less than 0 mm.
The heating element according to claim 8 is the heating element according to any one of claims 1 to 7,
It is characterized in that at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region of the storage body constituting the heat generating member after the end of heat generation and the divided portion serving as the seal region is 700 mN / cm or less.
The heating element according to claim 9 is the heating element according to claim 1,
An exothermic part provided with an interval, with a plurality of divided heat generating parts as seal parts, containing a water-containing heat generating composition containing iron powder, carbon component, reaction accelerator and water as essential components. A heating element having an excess water value of 0, a rising temperature rising rate of 40 ° C./5 minutes or more, and a minimum bending resistance of the heating element of 70 mm or less, The minimum bending resistance change is -95 to 0.
The heating element storage body of the present invention is as described in claim 10,
A separate heat generating area, which is an area where the exothermic composition containing iron powder, carbon component, reaction accelerator, and water as essential components is stored, and a non-storage area of the exothermic composition, and the dividing area, which is a seal area, are integrated. And a plurality of divided heat generating region are provided at intervals with the divided portion as an interval, and at least a part thereof is air permeable, and at least one of the longitudinal direction across the divided heat generating region and the divided portion of the storage body. One loop stiffness is 700 mN / cm or less.
Further, the heating element storage body according to claim 11 is as described in claim 10,
The maximum tensile strength at 25 ° C of at least one of the compartments of the container is 20 g / mm width or more, and the elongation at break at 25 ° C is 5% or more.
The manufacturing method of the heating element of the present invention is as described in claim 12,
A container having a structure composed of a divided heat generating portion region and a divided portion region that is a connecting portion has an excess water value of 0.5, with iron powder, a carbon component, a reaction accelerator, and water as essential components in the divided heat generating portion region. The exothermic composition molded body obtained by molding the -80 excess water exothermic composition is accommodated, and a plurality of segmented heat generating portions are provided at intervals with a segmented portion that is a hinge as an interval. The portion has air permeability, and at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region and the divided portion of the container is 700 mN / cm or less, and is flexible based on the structural flexible function and the joint flexible function. An exothermic precursor having the property of being encased in an outer bag, which is a container composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day), in a natural environment not damaged, and , Holding temperature 1-80 ° C and holding humidity 95 % In a controlled environment selected from below the control environment, and the retention period is 25 hours to 2 years,
A segmental heat generating unit containing a water-containing heat generating composition having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more; A partitioning portion that is a hinge is integrated, a plurality of partitioning heat generating portions are provided at intervals with the partitioning portion as an interval, and at least a part of the heating element has air permeability, and the partitioning heat generating region of the storage body And a heating element having a flexibility based on a structural flexible function and an articulating flexible function, wherein at least one loop stiffness in a longitudinal direction across the section is 700 mN / cm or less. Production method.
Moreover, the manufacturing method of the heating element of the present invention is as described in claim 13,
A container having a structure composed of a divided heat generating portion region and a divided portion region that is a connecting portion has an excess water value of 0.5, with iron powder, a carbon component, a reaction accelerator, and water as essential components in the divided heat generating portion region. The exothermic composition molded body obtained by molding the -80 excess water exothermic composition is accommodated, and a plurality of segmented heat generating portions are provided at intervals with a segmented portion that is a hinge as an interval. The portion has air permeability, and at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region and the divided portion of the container is 700 mN / cm or less, and is flexible based on the structural flexible function and the joint flexible function. The exothermic precursor having the property is composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day) Encased in an outer bag that is a container and damaged In a natural environment and in a kind of environment selected from a controlled environment having a holding temperature of 1 to 80 ° C. and a holding humidity of 95% or less, and the holding period is 25 hours to 2 years, A segmental heat generating portion containing a water-containing heat generating composition having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 40 ° C./5 minutes or more; A partitioning portion that is a hinge is integrated, a plurality of partitioning heat generating portions are provided at intervals with the partitioning portion as an interval, and at least a part of the heating element has air permeability, and the partitioning heat generating region of the storage body And at least one loop stiffness in the longitudinal direction across the section is 700 mN / cm or less, and a heating element having flexibility based on a structural flexible function and an articulated flexible function is manufactured.

1. The heating element of the present invention is thin, excellent in flexibility, comfortable to wear and feel, good in touch, can be applied to various applications, from the start of heat generation to the end of heat generation, from the start of use to the end of use, It is possible to provide a heating element that does not change flexibility and has good wearability.
2. The segment heating part heating element defined by the loop stiffness of the present invention, when the segment heating part heating element is placed along a heated body such as a body, regardless of the weight of the heating composition of the heating element, It is possible to provide a heating element that has a non-repulsive property that can be easily along the body to be heated and does not return to its original state due to the repulsive force even after the alignment.
3. The heating element of the present invention has a water-containing heating composition having excellent heat generation performance, and can provide a comfortable heating element that warms immediately after the start of use.
4). The heating element of the present invention is a segment heating part heating element, a rigid and soft heating element, a stripe heating element, an expansion heating element, a band heating element, a tunnel ventilation heating element, a drug heating element, a detachable heating element, and a detachable tunnel ventilation heating element. It consists of a group of heating elements of various sizes and shapes, such as a separable medicine heating element, eye temperature heating element, face temperature heating element, outer temporary folding heating element with outer bag, etc. .
5). The heating element storage body of the present invention can provide a heating element with excellent flexibility and excellent fit.
6). By the method for producing a heating element of the present invention, surplus water can be removed under mild conditions without damaging the heating element from various sizes and shapes of heating elements having surplus water-containing exothermic compositions. It has a hydrous exothermic composition with a high rate of temperature increase, is excellent in heat generation performance, and can easily provide various sizes and shapes of heating elements.

The heating element of the present invention has a water-containing heating composition with a surplus water value of 0, has excellent heat generation characteristics, is composed of a section heating section and a section section, and incorporates a housing body defined by loop stiffness into its constituent members. It is a segmental heating element heating element that has practical flexibility, excellent fit, good conformity to the body to be heated, no resilience, good fit and feel.
That is, the segmented heating element heating element of the present invention can be easily applied when the segmented heating element heating element is placed along a body or other heated body, regardless of the weight of the heating composition of the heating element. It is a heating element that has a non-repulsive property that can be along a warm body and does not return to its original state by a repulsive force even after being along.
Conventionally, the minimum bending resistance, which has been used, is not sufficient as an index of flexibility because it is not possible to define repulsion due to bending even if it can define flexibility.
In the present invention, the storage body defined by the loop stiffness is used as the storage body that is an important component of the heat generation body, and the heat generation body having flexibility in consideration of both flexibility and resilience is realized.
That is, the heating element of the present invention is
A water-containing heat-generating composition having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more, and a plurality of divided heat-generating part regions And the section is integrated, and at least a part is provided with a breathable storage body, a section heating section that is a section heating section in which the water-containing heating composition is stored, and a non-storage area of the heating composition, A partitioning portion that is a hinge is integrated, a plurality of partition heating portions are provided at intervals with the partitioning portion as an interval, and at least a part has air permeability, and the partition heating portion region and the partitioning portion of the storage body At least one loop stiffness across the longitudinal axis is 700 mN / cm or less, and has a flexibility based on a structural flexible function and an articulated flexible function,
At least one loop stiffness in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of at least one of the divided portions is 20 g / mm width or more. , A heating element having a breaking elongation at 25 ° C. of 5% or more,
A heating element in which at least one loop stiffness in the longitudinal direction across the section heating section region and the section of the storage body is 700 mN / cm or less, and the loop stiffness of at least one section is 700 mN / cm or less;
At least one loop stiffness in the longitudinal direction crossing the divided heat generating area of the container and the divided area that is the seal area is 700 mN / cm or less, and intermittent cuts are provided in at least a partial area of the divided area. Heating element
At least one loop stiffness in the longitudinal direction across the section heating portion area of the container and the section that is the seal area is 700 mN / cm or less, and at least a part of each section heating section is covered with a local ventilation material, The heating element has a space surrounded by the ventilation side, the partitioning portion, and the local ventilation material of the heat generating portion, and at least the side ventilation portion facing the space portion of the divided heat generating portion ventilates the heat generating composition.
At least one loop stiffness in the longitudinal direction crossing the sectioned heat generating area of the storage body and the section that is the sealing area is 700 mN / cm or less, and the heat generating element has a minimum stiffness of 70 mm or less. A heating element having a change of −95 to 0 and having flexibility based on a structural flexible function and an articulated flexible function,
A heating element having a hydrous heating composition is a segment heating element, a rigid and soft heating element, a stripe heating element, a detachable heating element, a stretchable heating element, a band heating element, a tunnel ventilation heating element, a drug heating element, and a detachable tunnel. It is a kind selected from aeration heating element, separable medicine heating element, eye temperature heating element, face temperature heating element, outer temporary folding folding heating element with outer bag, and the hydrous heating composition is iron powder, carbon component, reaction Accelerator, water is an essential component, surplus water value is 0, rising temperature rise rate is 12 ° C./5 min or more, and is a divided heat generating region and a seal region of the housing constituting the heat generating member At least one loop stiffness in the longitudinal direction across the section is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, 25 Elongation at break is not less than 5%, the minimum bending resistance of the heating element is not more 70mm or less, a heating element minimum stiffness difference is less 0 mm,
A heating element having at least one loop stiffness of 700 mN / cm or less in the longitudinal direction across the section heating section area of the storage body constituting the heating element after the end of heat generation and the section section being the seal area,
An exothermic part provided with an interval, with a plurality of divided heat generating parts as seal parts, containing a water-containing heat generating composition containing iron powder, carbon component, reaction accelerator and water as essential components. A heating element having an excess water value of 0, a rising temperature rising rate of 40 ° C./5 minutes or more, and a minimum bending resistance of the heating element of 70 mm or less, The heating element has a minimum change in bending resistance of -95 to 0.
Further, the shape of the heat generating section, the heat generating section, and the heat generating body of the heat generating body of the present invention is not limited.
The heating element and / or the divided heating part may be provided with corners in a substantially arc shape (R shape), and the corners may be curved or curved.
Further, the heating element of the present invention is a segment heating part heating element, which is a rigid and soft heating element, a stripe heating element, a band heating element, a detachable heating element, a stretchable heating element, a band heating element, a tunnel ventilation heating element, a drug heating element. Detachable tunnel ventilation heating element, separable medicine heating element, eye temperature heating element, face temperature heating element, outer temporary folding folding heating element with outer bag, one kind selected from variously shaped heating element groups .
Further, the loop stiffness of the storage body after the end of heat generation is 700 mN / cm or less.
The heating element of the present invention has a softness that cannot be defined only by bending resistance, by making the waist strength (flexibility) of the housing constituting the heating element that does not contain surplus water within a certain range. A heat generating element having various shapes and sizes having practical flexibility and having a stable and excellent heat generation property.

The heating element of the present invention preferably further has at least one of the following items.
1) The maximum tensile strength at 25 ° C. of at least one of the sections is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more.
2) The loop stiffness of at least one section is 700 mN / cm or less.
3) Intermittent cuts are provided in at least a partial region of the section.
4) Further, at least a part of each divided heat generating part is covered with a local ventilation material, and has a space part surrounded by the ventilation side, the divided part and the local ventilation material of the divided heat generating part, and at least the space part of the divided heat generating part. The exothermic composition is ventilated from the side vent portion facing the surface.
5) The minimum bending resistance is 70 mm or less, and the minimum bending resistance change is −95 to 0.
6) The minimum bending resistance is 70 mm or less, and the minimum bending resistance difference is 0 mm or less.

  In particular, when the loop stiffness of the storage body of the divided heating section heating element of the present invention is 0.1 to 300 mN / cm or less, preferably 0.1 to 250 mN / cm, more preferably 0.1 to 200 mN / cm, The segmented heat generating part has excellent flexibility that the section of the heating element can be easily bent. Further, when the loop stiffness of at least one section is 300 mN / cm or less, preferably 0.1 to 250 mN / cm, more preferably 0.1 to 200 mN / cm, the section of the section heating section heating element is Has excellent flexibility to bend more easily.

It is preferable that the heating element of the present invention after the heat generation further has at least one of the following items.
1) The maximum tensile strength at 25 ° C. of at least one of the sections is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more.
2) The loop stiffness of at least one section is 700 mN / cm or less.
3) In at least one selected from the loop stiffness of the section, the maximum tensile strength at 25 ° C., and the elongation at break, each physical property value in each region is 0.3 to 1.7 times the average of the corresponding physical property values. Has a value.
4) The minimum bending resistance is 70 mm or less, and the minimum bending resistance change is −95 to 0.
5) The minimum bending resistance is 70 mm or less, and the minimum bending resistance difference is 0 mm or less.

In the heating element of the present invention,
1) The loop stiffness of the storage body was set to 700 mN / cm or less, the flexibility of the storage body was ensured, and the moderate flexibility of the heating element was ensured.
2) The maximum tensile strength at 25 ° C. of at least one section is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more, preferably the maximum tensile strength at 25 ° C. of each section Is 20 g / mm width or more, the elongation at break at 25 ° C. is 5% or more, and the toughness for maintaining the structure of the heating element and the extensibility for maintaining flexibility are ensured.
3) The loop stiffness of at least one section was set to 700 mN / cm or less to ensure the flexibility of the joint of the heating element.
4) The minimum bending resistance of the heating element is 70 mm or less, the difference in minimum bending resistance is 0 or less and / or the change in minimum bending resistance is -95 to 0, before use, during use, after use. A heating element with the same flexibility was secured.
5) The loop stiffness of the storage body after the end of heat generation is set to 700 mN / cm or less to secure the flexibility of the storage body. Secured.
6) Since the divided heat generating portion for storing the heat generating composition that becomes hard as heat is generated and the flexible divided portion regardless of the heat generation are mixed in the flexible storage body, the flexibility of the divided portion is guaranteed, and the heat generation of the present invention Body flexibility can be secured at any time.
7) The surplus water value of the exothermic composition was set to 0, and a heating element warmed immediately after the start of use was secured.
8) Cover at least a part of each divided heat generating part with a local ventilation material, adjust the ventilation to the heat generating composition and keep warm, or provide intermittent cuts in some partial areas of the divided part, etc. A heating element group with a broad base was formed.

The heating element storage body of the present invention comprises:
The segmented heat generating area, which is the area where the exothermic composition containing iron powder, carbon component, reaction accelerator, and water as the essential components is stored, and the area where the exothermic composition is not stored, and the section, which is the seal area, are integrated. And a plurality of divided heat generating regions are provided at intervals with the divided portions as an interval, and at least a part thereof is air permeable, and at least one in the longitudinal direction across the divided heat generating region and the divided portions of the storage body. A heating element storage body having a loop stiffness of 700 mN / cm or less,
The heating element storage body has a maximum tensile strength at 25 ° C. of 20 g / mm width or more and an elongation at break of 5% or more at 25 ° C. of at least one section of the storage body.
The heating element storage body of the present invention (hereinafter referred to as the storage body)
Using a base material and a covering material composed of a substantially flat packaging material, a divided heat generating region that stores a heat generating composition, a non-storage region of the heat generating composition, a seal region, and a connecting portion The segmented portions that are hinges (bending regions) are integrated, and a plurality of segmented heat generating regions are provided at intervals, with at least a part of the segmented heat generating regions being air permeable. In addition, at least one loop stiffness in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body is 700 mN / cm or less. Further, preferably, at least one of the sections has a maximum tensile strength at 25 ° C. of 20 g / mm width or more and an elongation at break at 25 ° C. of 5% or more. Because of the flexibility defined as described above, the heating element that contains the heat generating composition in the section heat generating portion region to form the section heat generating portion can have the same flexibility before, during, and after the heat generation. Moreover, the storage body of this invention does not ask | require whether the exothermic composition is accommodated in the division | segmentation heat-emitting part area | region. Further, a storage body after a part of the divided heat generating portion is cut and the heat generating composition is removed is also included in the storage body of the present invention.

The loop stiffness of the storage body according to the present invention generates heat in a direction that passes through the section heating section area and the section of the storage body in which the section heating section area that is a non-sealing area and the section section that is a sealing area are mixed and substantially orthogonal to each other. The loop stiffness of at least one sample of the plurality of samples of the container cut out in the longitudinal direction of the region including the seal portion at the periphery of the body may be 700 mN / cm or less.
The loop stiffness of the segmented portion of the present invention may be such that when there are a plurality of segmented portions, the loop stiffness of at least one sample of the plurality of segmented portions is 700 mN / cm or less.
As the loop stiffness of the container of the present invention and the loop stiffness of the section according to the present invention, values measured at room temperature, preferably at 25 ° C. are adopted.
The maximum tensile strength of the section at 25 ° C. of the present invention may be such that when there are a plurality of sections, the maximum tensile strength of at least one sample of the plurality of sections is 20 g / mm width or more.
The breaking elongation at 25 ° C. of the present invention may be such that when there are a plurality of dividing portions, the breaking elongation of at least one of the plurality of dividing portions is 5% or more.

  The “classified heat generating portion” of the present invention is a non-sealed region in the heat generating body and heat generating precursor that is not sealed between the packaging materials, and is a region that contains the heat generating composition.

`` Division part '' of the present invention is a non-contained area of the exothermic composition in the central part other than the peripheral part of the exothermic body and exothermic precursor, and is a seal area where the packaging material is sealed, It is a connecting part which exists between the segment heat generation part and the segment heat generation part so that the segment heat generation part can exist at intervals, and is a hinge (bending region). As long as the section is a seal region, there is no limitation, and examples include a heat seal region, an adhesive (pressure-sensitive) seal region, and an adhesive seal region. A heat seal region (heat seal portion) is particularly preferable.

In the heating element and the heating precursor of the present invention, the bending is performed mainly at the section, but the bending may be performed in other regions.
In addition, the outer shape of the heating element and the heating precursor of the present invention is not limited, but is rectangular, square, blister, eye mask, bowl, bowl, rounded rectangle, rounded square, egg, boomerang Examples include shapes, spheres, stars, wings, noses, lanterns, and feet. The airfoil is suitable around the neck and shoulders.
Moreover, you may form the angle of the outer shape of a heat generating body and a heat generating precursor in a substantially circular arc shape.

The “plurality of divided heat generating portions” of the present invention means two or more, preferably three or more, more preferably four or more divided heat generating portions. The same applies to the divided heat generating area.
The “plurality of sections” in the present invention means two or more, preferably three or more, more preferably four or more sections.

  The divided heat generating portion of the heat generating element and heat generating precursor of the present invention has a convex shape at least on one side of the divided portion which is a seal region, and is composed of a top portion and a side portion.

Depending on the type and thickness of the sealing layer made of a material film made of polyethylene film, porous film, or the like constituting the base material or the coating material, or a heat sealing material, the flexibility of the heat generating composition storage body varies widely. And greatly affects the flexibility of the heating element.
Only the structure in which the heating element is a combination of a segment heating part containing a heating composition and a segmenting part not containing a heating composition, or by increasing the weight of the heating composition of the segment heating part, the stiffness of the heating element If the value is not more than a specific value, a heating element with good touch, excellent flexibility and good wearability cannot be obtained.
In the present invention, by limiting the loop stiffness of the storage body to 700 mN / cm or less, the flexibility of the storage body itself can be ensured accurately, and without increasing the weight of the heat generating composition of the divided heat generating portion, The section corresponding to this is soft, and the heating element is excellent in flexibility. Furthermore, by restricting the loop stiffness of the segmented portion to 700 mN / cm or less, it is possible to impart good waist strength (hardness) to the segmented portion and to obtain a good hinge function.
In addition, since the maximum tensile strength at 25 ° C. of the at least one section of the present invention is 20 g / mm width or more and the elongation at break at 25 ° C. is 5% or more, the section that is a sealed connection section is provided. While maintaining the shape as the sectioning portion, the section heating section is securely supported while maintaining the section heating section, functions as a hinge, and bends more preferentially than the section heating section containing the heating composition.
Incorporating these factors, the minimum bending resistance of the heating element is 70 mm or less, the difference in minimum bending resistance is 0 or less and / or the change in minimum bending resistance is -95 to 0, so that the unevenness is gentle. There is no sense of incongruity, the section corresponding to the joint is soft and flexible, the flexibility of the heating element does not change before and after the heat generation, and the flexibility does not change before, during, and after use. Or, a heating element with increased flexibility could be secured. Since the flexibility does not change or increases, it is difficult for the body or object to peel off from the application part, adhesiveness (adhesiveness) is not easily lost, and it has excellent wearability and adhesion. Part heating element. It is preferable that the loop stiffness of the storage body after the end of heat generation and the loop stiffness of at least one section of the storage body are 700 mN / cm or less.

  The structural flexible function is a function that imparts flexibility resulting from a structure in which the heating element has a region that is difficult to bend and a region that is easily bent. That is, it is a function of holding the entire heating element flexibly. Specifically, it is a heating element composed of a segment heating part having a hydrous heat generating composition in a region that is difficult to bend, and a segmenting part that is a sealed region without a hydrous heat generating composition in a region that is easily bent. . By defining the loop stiffness of the housing constituting the heating element to a predetermined value, the flexibility and feel of the entire heating element are realized.

  The articulating flexible function is a function that gives flexibility to a section corresponding to the joint of the heating element, and the section can be bent smoothly. In other words, it is a hinge function that operates with a weak force. By reducing the loop stiffness of the storage body or the like, the section of the section heating section heating element can be bent, and practical flexibility can be ensured.

  By combining the structural flexible function and the articulating flexible function, the function that the section can be smoothly bent before, during, and after the heat generation is secured.

  At least one section of a storage body including a section heat generating area for storing the water-containing heat generating composition, a non-storage area, a seal area, a connecting section, and a section that is a hinge (bending area). By making the loop stiffness 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more. It has a good function and feel and embodies a hinge function that shows a good feel.

  The loop stiffness of the storage body after the end of heat generation and the loop stiffness of at least one section of the storage body are set to 700 mN / cm or less, the loop stiffness of the storage body before and after the end of heat generation, and at least one of the storage body. By making the loop stiffness of the two sections almost equal or not changing, it is possible to secure the function that the section can be bent more smoothly before heating, during heating, and after the end of heating, and heat generation with more flexibility. The body can be secured.

  In addition to incorporating these elements, the heating element of the present invention has a minimum bending resistance of 70 mm or less, a minimum bending resistance change of −95 to 0 and / or a minimum bending resistance difference of 0 or less. Due to this, the unevenness is gentle and there is no sense of incongruity, the section that hits the joint is soft and flexible, the flexibility of the heating element before and after heat generation does not change, before use, during use, after use In addition, a heating element that does not change flexibility or increases flexibility can be secured. Therefore, since flexibility does not change or increases, along the shape of the heated body such as the body or object, it is easy to follow the shape of the heated body, it is difficult to peel off from the affixed part, it is excellent in wearability and adhesion In addition, a separate heating element can be provided.

The loop stiffness of the storage body according to the present invention is an index indicating the flexibility of the heating element, and is an index expressed numerically by taking into account both the flexibility and the non-repulsive property of the storage body.
Thereby, the flexibility of the heating element, in particular, the flexibility of the divided heating part heating element composed of a plurality of divided heating parts and the dividing part and the similar heating element can be accurately expressed numerically.
In addition, when the heating element is placed along a body to be heated, the heating element can be easily placed along the heating body regardless of the weight of the heating composition of the heating element. It is an index for realizing a non-repulsive heating element that does not return to its original state due to repulsive force.
If the loop stiffness of the storage body is increased, the repulsive force is increased, the flexibility of the storage body is lost, the heating element is stiffened, the flexibility is lost, and the touch is not good.
The loop stiffness of the storage body can define both flexibility and resilience, but the minimum bending resistance cannot define resilience due to bending even if it can define flexibility.
Originally, when the flexibility of the heating element is defined, the flexibility can be defined only when both the flexibility and the non-repulsive property can be defined.
The heating element having the housing body defined by the loop stiffness of the present invention has flexibility of the heating element, in particular, the flexibility of the divided heating part heating element composed of a plurality of divided heating parts and the dividing part and its similar heating element. A heating element having a good touch and flexibility that enables accurate numerical expression is realized and can be provided.
Although there is no restriction | limiting in the adjustment method of the loop stiffness of the storage body of this invention, It is preferable to adjust with sealing layers, such as a packaging material and a heat sheet layer, an adhesive layer, and the width | variety and number of division parts.

The loop stiffness of the section of the present invention is an index expressed numerically by taking into account both the flexibility and the non-repulsive property of the section, which is the bent region that is the hinge of the section heating element heating element.
When the loop stiffness of the section is increased, the repulsive force is increased, the flexibility of the section is lost, the heating element is stiffened, the flexibility is lost, and the touch is not good.
The loop stiffness of the section is independent from the loop stiffness of the storage body, but when combined, the section heat generator group (the section heat generator and its similar heat generation is flexible and comfortable to touch. To say the body).

   In the section, by limiting the loop stiffness of at least one section to 700 mN / cm or less, it is possible to impart good waist strength (hardness) to the section, and a good hinge function is obtained, The flexibility of the joint of the heating element can be ensured.

  The loop stiffness of the storage body after the end of heat generation according to the present invention is used when the obtained segment heating part heating element is heated in a normal atmosphere and the temperature of the segment heating part heating element falls below 37 ° C. Assuming the end, the end of the heating section of the heating element after the end of heat generation is opened, the heating composition is taken out, and the heating section area and the sealing section are the non-sealing part of the container that is the remaining packaging material. It is the loop stiffness of the section of the storage body cut in the longitudinal direction of the region including the seal portion at the periphery of the segment heating element heating element in a direction passing through the segmenting section almost orthogonally. This is an index of the flexibility of the storage body after the end of heat generation.

The storage body uses a base material and a covering material composed of a packaging material having a substantially flat surface, and has a structure consisting of a region for storing the excess water heating composition and a hinge (bending region). And at least a part of one surface of the storage body has air permeability.
A packaging material having a layer or region composed of an adhesive, an adhesive, a heat seal material, etc., is treated as a single packaging material. When not fixed, the packaging material is removed, and mechanical properties such as loop stiffness are measured.

  The loop stiffness of the container before heat generation according to the present invention is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.01 to 500 mN. / Cm, more preferably 0.01 to 400 mN / cm, still more preferably 0.01 to 300 mN / cm, still more preferably 0.1 to 300 mN / cm, and still more preferably 0.1. To 250 mN / cm, more preferably 0.1 to 200 mN / cm, more preferably 0.5 to 200 mN / cm, still more preferably 1 to 200 mN / cm, and still more preferably 5 to 200 mN. / Cm, more preferably 10 to 200 mN / cm. When it exceeds 700 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.

  The loop stiffness of at least one section before heat generation according to the present invention is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.8. It is 01-500 mN / cm, More preferably, it is 0.01-400 mN / cm, More preferably, it is 0.01-300 mN / cm, More preferably, it is 0.1-300 mN / cm, More preferably It is 0.1-250 mN / cm, More preferably, it is 0.1-200 mN / cm, More preferably, it is 0.5-200 mN / cm, More preferably, it is 1-200 mN / cm, More preferably It is 5-200 mN / cm, More preferably, it is 10-200 mN / cm. When it exceeds 700 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.

  The loop stiffness of the container after the heat generation is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.01 to 500 mN / cm. cm, more preferably 0.01 to 400 mN / cm, still more preferably 0.01 to 300 mN / cm, still more preferably 0.1 to 300 mN / cm, still more preferably 0.1 to 300 mN / cm. 250 mN / cm, more preferably 0.1 to 200 mN / cm, more preferably 0.5 to 200 mN / cm, still more preferably 1 to 200 mN / cm, still more preferably 5 to 200 mN / cm. cm, more preferably 10 to 200 mN / cm. When it exceeds 700 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.

  The loop stiffness of at least one section after the end of heat generation is 700 mN / cm or less, preferably 600 mN / cm or less, more preferably 0.01 to 600 mN / cm, and still more preferably 0.01. To 500 mN / cm, more preferably 0.01 to 400 mN / cm, still more preferably 0.01 to 300 mN / cm, still more preferably 0.1 to 300 mN / cm, and still more preferably 0. 0.1 to 250 mN / cm, more preferably 0.1 to 200 mN / cm, more preferably 0.5 to 200 mN / cm, still more preferably 1 to 200 mN / cm, and still more preferably 5 It is -200mN / cm, More preferably, it is 10-200mN / cm. When it exceeds 700 mN / cm, the waist of a storage body will become strong and each softness | flexibility of a division | segmentation heat_generation | fever part heat heating element group will not be obtained.

  The difference between the loop stiffness of the container before the heat generation and the end of the heat generation, and the difference of the loop stiffness of the section before the heat generation and the end of the heat generation are preferably ± 500 mN / cm, more preferably ± 300 mN / cm. More preferably ± 100 mN / cm, further preferably ± 80 mN / cm, further preferably ± 50 mN / cm, further preferably ± 20 mN / cm, and further preferably ± 10 mN / cm. More preferably, it is ± 5 mN / cm, and more preferably 0 mN / cm.

  In the container, the maximum tensile strength at 25 ° C. of at least one section is preferably 20 g / mm width or more, more preferably 20 to 1,000 g / mm width, still more preferably 20 to 800 g. / Mm width, more preferably 20 to 700 g / mm width, more preferably 20 to 600 g / mm width, still more preferably 20 to 500 g / mm width, still more preferably 20 to 400 g / mm. Width.

  In the container, the breaking elongation at 25 ° C. of at least one section is preferably 5% or more, more preferably 10% or more, still more preferably 10 to 200%, and still more preferably 15 ~ 200%.

  The maximum tensile strength at 25 ° C. of at least one section of the container after the end of heat generation is preferably 20 g / mm width or more, more preferably 20 to 1,000 g / mm width, and still more preferably. Is 20 to 800 g / mm width, more preferably 20 to 700 g / mm width, more preferably 20 to 600 g / mm width, still more preferably 20 to 500 g / mm width, still more preferably 20 ˜400 g / mm width.

  The elongation at break at 25 ° C. of at least one section of the container after the end of heat generation is preferably 5% or more, more preferably 10% or more, still more preferably 10 to 200%, More preferably, it is 15 to 200%.

  At least one of the maximum tensile strength, breaking elongation, and loop stiffness of the section is preferably 0.3 to 1.7 times the average value of the physical properties of each section, and more preferably 0.4 to 1.6 times, more preferably 0.5 to 1.5 times, still more preferably 0.6 to 1.4 times, and even more preferably 0.7 to 1.3 times.

  At least one of the maximum tensile strength, breaking elongation, and loop stiffness of the section after the heat generation is preferably 0.3 to 1.7 times the average value of the physical properties of each section, and more preferably 0.4 to 1.6 times, more preferably 0.5 to 1.5 times, further preferably 0.6 to 1.4 times, more preferably 0.7 to 1.3 times. It is.

  The minimum bending resistance of the heating element is preferably 70 mm or less, more preferably 1 to 70 mm, still more preferably 5 to 70 mm, still more preferably 5 to 60 mm, and further preferably 5 to 50 mm. More preferably, it is 10-50 mm, More preferably, it is 10-40 mm, More preferably, it is 10-30 mm.

  The minimum change in bending resistance of the heating element is -95 to 0, preferably -90 to 0, more preferably -90 to -0.01, still more preferably -80 to -0.01. More preferably, it is -70 to -0.01, -60 to -0.01, and more preferably -50 to -0.01.

  The minimum bending resistance difference of the heating element is 0 mm or less, preferably −69 to 0 mm, more preferably −60 to 0 mm, still more preferably −50 to 0 mm, and further preferably −40. It is -0mm, More preferably, it is -30-0 mm, More preferably, it is -20-0 mm, More preferably, it is -10-0 mm, More preferably, it is -5-0 mm.

  The thickness of the heating element is not limited as long as it can be used as a flexible heating element, but is preferably 0.05 to 20 mm, more preferably 0.05 to 15 mm, and still more preferably 0.1 to 10 mm. More preferably, it is 0.1-9 mm, More preferably, it is 0.3-8 mm, More preferably, it is 0.3-7 mm, More preferably, it is 0.5-7 mm, More preferably It is 0.5-5 mm, More preferably, it is 0.3-3 mm.

As described above, the heating element of the present invention warms immediately after the start of use, and has a flexible function composed of two functions of a structural flexible function and an articulated flexible function supported by various physical properties, It is a thin heating element that is soft and comfortable before heating, during heating, after heating, that is, before use, during use, and after use.
In addition, when the heating element has a fixing means, and the heating element adheres to the skin side of clothing that comes into contact with the skin, particularly in the case of a heating element having an adhesive layer fixing means on the breathable surface side, it adheres to the skin. It has the characteristics that the body can be directly heated without any harmful effects caused by the agent, and cannot be obtained with a direct-paste heating element. Further, in the case of a double-sided breathable heating element, in particular, in the case of a heating element having an adhesive layer as a fixing means on the non-breathable surface side, steam generated from the heating element can be supplied to the skin.
An example of the heating element of the present invention is a section heating element heating element. In the heat generating portion, the surplus water value of the hydrous heat generating composition is 0, the rising temperature rising rate is 12 ° C./5 minutes or more, and the longitudinal direction crossing the sectioned heat generating area and the section of the storage body At least one loop stiffness is 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more, The minimum bending resistance of the heating element is 70 mm or less, and the minimum bending resistance difference is 0 mm or less.

The rigid and soft heating elements of the present invention have two or more, preferably three or more, more preferably four or more, and still more preferably five or more divided heat generating parts composed of a plurality of exothermic composition molded bodies and one or more. The heating element has a heating part composed of a plurality of dividing parts, and at least one loop stiffness in the longitudinal direction crossing the divided heating part region and the dividing part of the storage body is 700 mN / cm or less, and the minimum bending resistance of the heating element is 70 mm or less. It is a segment heating part heating element which is. It is preferable that the divided heat generating portion and the divided portion are configured in a stripe shape.
In the rigid and soft heating element having a structure in which the exothermic composition is not contained between the exothermic components containing the exothermic composition and the sealing region is present and the segmented portion that is a hinge is present, the heat generation is slight as heat generation proceeds. However, the weight of the exothermic composition is increased, and the rigid and soft heating element is easily bent at the section that is a hinge (bending region), and is closely attached to the heated body. The minimum bending resistance difference is 0 mm or less and / or the minimum bending resistance change is −95 to 0.
The minimum bending resistance ratio of the bending-soft heating element is preferably 100 or less, more preferably 1 to 100, still more preferably 1 to 80, still more preferably 1 to 50, still more preferably. It is 1-40, More preferably, it is 1-30, More preferably, it is 1-20.
The maximum bending resistance ratio of the bending-soft heating element is not limited, but is preferably 1.1 or more, more preferably 1.15 or more, still more preferably 1.2 or more, and further preferably It is 1.25 or more, More preferably, it is 2.0 or more, More preferably, it is 2.5 or more, More preferably, it is 3.0 or more.

  The stripe heating element of the present invention is a segment heating part heating element in which the segment heating parts are provided in a stripe shape.

  The separable heating element of the present invention is a section heating element heating element provided with perforated lines (intermittent cuts) in at least a part of the area other than the section heating section of the section heating section heating element of the present invention. is there. A segment heating part heating element having perforated lines (intermittent notches) that can be cut manually in at least one section is preferable.

  The expansion / contraction heating element of the present invention is a segment heating element heating element in which staggered cuts (intermittent cuts) are provided in at least a part of the region other than the segment heating part of the segment heating part heating element of the present invention. A segment heating part heating element having a staggered cut in a part of at least one section is preferable.

The band heating element of the present invention is a segment heating element heating element having a long stretchable support. An example is one in which a segmented heat generating part or a segmented heat generating part heating element is fixed to a long stretchable support via an adhesive, an adhesive, a heat seal material, or the like.
It is good also as a heat generating body which provided fixing means, such as an adhesive and a hook-and-loop fastener, in at least one part of the area | regions of support bodies other than a heat generating body. The fixing means is not limited, but a hook-and-loop fastener is preferable. In addition, the support is not limited as long as the heating element can be fixed, but examples of the support include a packaging material used for a base material and a covering material. When the support is non-breathable, it is fixed so that the non-breathable surface of the heating element faces the support surface. When the support is breathable, the heating element is fixed to the support by selecting as appropriate. Depending on the application, the stretchable support may be replaced with a non-stretchable support.

The tunnel ventilation heating element of the present invention is a heating element having a ventilation part composed of a local ventilation part leading to the outside, a wide area ventilation part leading to the heat generating composition, and a tunnel (space part) therebetween. It is preferable that the size of the ventilation holes is larger in the local ventilation portion than in the wide area ventilation portion, and the number of ventilation holes is larger in the wide area ventilation portion than in the local ventilation portion.
An example is a heating element in which at least a part of a heat generating part composed of a divided heat generating part and a divided part is covered with a local ventilation material, and a space part is formed by a side ventilation part, a divided part, and a local ventilation material of the divided heat generation part. As mentioned.
In a tunnel ventilation heating element based on a section heating section and a section section, the local ventilation material is fixed to at least a part of the top of one or more section heating sections through an adhesive layer made of an adhesive or an adhesive. There is a tunnel ventilation heating element that is not connected to the top of the section heating part.

  The drug heating element of the present invention includes a side ventilation portion that faces at least a part of a heat generation portion composed of a divided heat generation portion and a partitioning portion and is covered with a local ventilation material having a vent hole, and faces a space portion of the division heat generation portion. A space is formed by the section and the local ventilation member, and the local ventilation member is a heating element fixed at least at the entire peripheral portion of the heating element by a seal. A chemical heating element in which a local ventilation material is fixed to at least a part of the top of one or more segmental heating parts via an adhesive layer made of an adhesive or an adhesive, and a local ventilation material of the segmental heating part There is a drug heating element that is not fixed to the top. In addition, the ventilation holes of the local ventilation material are usually sealed with a ventilation blocking sheet. When the heating element is used, it is peeled off from the vent hole. Moreover, by using a non-breathable packaging material for the base material and the local ventilation material, the interaction between the heat generating composition and the exposed portion of the heat generating element can be prevented. Therefore, the interaction between the exothermic composition and the pressure-sensitive adhesive layer containing the functional substance can be prevented, and the respective functions can be maintained. In the conventional heating element, the interaction between the heating composition and the exposed portion of the heating element cannot be prevented, and both the heating composition and the pressure-sensitive adhesive layer containing the functional material are altered, and a drug heating element that can withstand practical use cannot be obtained. It was. It can be used as a normal heating element or patch without containing a functional substance.

  The separable tunnel ventilation heat generating body of the present invention has a perforation that can be cut into at least one or more of the fixed section portions, wherein the local ventilation material of the tunnel ventilation heat generating body is fixed to at least one or more section portions. Is provided.

  In the detachable drug heating element of the present invention, the local ventilation material of the drug heating element is fixed to at least one section, and a perforated line is provided in at least one of the fixed section. It is a thing.

 The tunnel ventilation heating element and the drug heating element having the local ventilation material with the ventilation blocking sheet do not generate heat until the ventilation blocking sheet is removed, and can be stored for a long time. Can be used. Since the packaging material of the outer bag can be omitted, the amount of garbage is reduced and it can contribute to environmental problems. It is useful to provide a fixing means on at least a part of the exposed portion of the tunnel ventilation heating element and the drug heating element including the local ventilation material.

Since the tunnel ventilation heating element and the drug heating element can adjust the ventilation by the space, the maximum temperature is less than 42 ° C, preferably 41 ° C or less, more preferably 36-41 ° C, and further preferably 36-40 ° C. Can be heated for a long time. This creates a heating element that does not cause low temperature burns. Incidentally, it is said that low temperature burns occur when the skin temperature is raised to 42-44 ° C. for 6 hours or more. Since the heating element based on the segment heating part heating element has no bias of the heating composition as a heating element from before the heat generation to after the end of the heat generation, it can be heated comfortably.
The tunnel ventilation heating element and the drug heating element are heating elements capable of finely adjusting the ventilation to the heat generating composition by local ventilation by a large ventilation hole, space, and wide ventilation by a small ventilation hole.

The face temperature heating element of the present invention is a heating element that can cover the face.
In particular, a face temperature heating element that heats the eyes and the vicinity thereof is referred to as an eye temperature heating element.
A face temperature heating element that heats the nose and its surroundings is referred to as a nasal temperature heating element.
1. The face temperature heating element includes 1) an integrated type in which the heating part and its support are integrated, and 2) an assembly type in which the heating part and its support are provided separately and integrated in use.
2. The integrated face temperature heating element can be used immediately and is convenient. Various types of products are provided by selecting the number, size, arrangement, etc. of the divided heat generating portions according to each application, from a wide range of heating to a specific region.
3. The assembly-type face temperature heating element is 1) an insertion type in which the heating element and the heating part are stored in the storage part of the support, and 2) fixing the heating element and the heating part to the support through fixing means such as an adhesive layer. There is a pasting formula. When heating only a specific area of the face, the facial temperature heating element can be used by inserting a minimal heating element into a support such as a mask or by attaching it to the support with a fixing means such as an adhesive. It is also useful. The minimal heating element is not limited, but is a minimal heating element having a single heating part, having two or more divided heating parts, and having a cutable portion (perforation, etc.) that can be cut off in the dividing part. An example is a segmented heat generating part separated from the heat generating element.
4). The shape of the face temperature heating element is not limited, but a rectangular shape, a mask shape, and an eye mask shape are examples.
5 It is preferable to provide a texture material on at least one of the face side of the face temperature heating element and the outer side which is the opposite side to improve the feeling.
6). The means for fixing the face temperature heating element to the face or the like is not limited, but examples include an ear strap, an ear strap, and an ear strap rubber.
7). The structure of the expansion / contraction heating element provided with alternate cuts and the face temperature expansion / contraction heating element having various expansion / contraction functions are preferable for tight fixation to the face or the like. As an example of the assembly type, a heating element in which a staggered cut is provided in a support such as a mask and a single heat generating part or a small single heat generating part is inserted or stuck between the staggered cuts is an example.
8). A functional substance or the like may be carried inside or outside the face temperature heating element to have a fragrance effect or a pharmacological effect. For example, an integral type or a push-in type using a sheet material coated with an aqueous pap base is cited.
9. In order to maintain an appropriate temperature of the face temperature heating element to the warmed body (contact temperature to the warmed body is 42 ° C. or lower, preferably 40 ° C. or lower, more preferably 36 to 40 ° C.) It is preferable to use a heating part or a heating element having a structure of a drug heating element provided with a local ventilation material for the face temperature heating element. Temperature buffer materials are also useful.
10. In the face temperature heating element, at least a part of the section heating part is breathable due to moisture permeability, and also has moisture permeability, so the skin side is moisture permeable and water vapor from the heating composition is released toward the skin. It is preferable to select a type that makes the skin side surface moisture-impermeable and does not release water vapor from the exothermic composition toward the skin.
11. For the eye temperature heating element and the nasal temperature heating element, the above 1. -10. The following items are applicable.
12 The nasal temperature heating element is preferably provided with one or more heating parts or small heating elements at positions corresponding to at least both sides of the nose. In the case of the assembly type, it is preferable that one or more heating parts or small heating elements are attached to the region of the container such as a mask.
13. As an example of the heating element, 1) an integrated type is an integrated face temperature heating element, an integrated eye temperature heating element, an integrated nose temperature heating element, and 2) an assembly type is an assembly type face temperature heating element, an assembly type eye. Heating element, assembled nose temperature heating element, 3) insertion type is insertion type face temperature heating element, insertion type eye temperature heating element, insertion type nose temperature heating element, 4) pasting type is pasting type face temperature Heating element, pasting type temperature heating element, pasting type nose temperature heating element, 5) Face temperature expansion / contraction heating element, eye temperature expansion / contraction heating element, and nasal temperature expansion / contraction heating element in each formula.
Also,
1) The container such as the mask of the present invention may be provided with a moisture holding body that releases water vapor separately from the heating element. As the moisture retainer, non-woven fabric, woven fabric, porous polymer impregnated with water, water-absorbing polymer water absorbed, or the like can be used.
2) The shape and material of the mask body are not limited as long as the heating element can be attached and either or both of the nose and mouth can be covered.

  The temperature buffer material is not limited as long as the temperature from the heat generating part can be buffered, but (1) gauze, various woven fabrics, non-woven fabrics, (2) papers such as paper and synthetic paper, (3 ) Porous film or porous sheet formed from plastic, natural rubber, recycled rubber or synthetic rubber, (4) foamed plastic such as urethane foam having perforations, (5) one or more metal foils such as aluminum having perforations An example is a combination of species. In addition, when controlling temperature using these temperature buffer materials, selection of the material, thickness, etc. of a temperature buffer material are selected suitably. What is necessary is just to select suitably also when making the water vapor | steam which generate | occur | produces from a heat generating body reach eyes or a face. The temperature buffer material can be used not only for eyes and faces but also for other heating elements.

  Moreover, as a space | gap for controlling the temperature which reaches | attains the face of this invention, it is preferable that the distance of a heat generating body and a face shall be 1-10 cm.

  The eye temperature heating element of the present invention, the eye temperature heating element with a local ventilation material, which is an example of the face temperature heating element, and the face temperature heating element with a local ventilation material are locally ventilated on the ventilation surface of the eye temperature heating element or the face temperature heating element. It is a heating element provided with a material, the temperature can be adjusted more precisely by local ventilation, and an appropriate temperature such as 38 to 45 ° C., preferably 38 to 40 ° C. can be maintained.

  The ear hooking part of the present invention is not limited, but examples thereof include rubber strings, cotton strings, and hollow nonwoven fabrics.

  An outer temporary folding folded heating element with an outer bag of the present invention is a heating element stored in a non-breathable storage body in a folded or wound state, and at least an exposed portion of the heating element body (heating element). A part of the bag may be temporarily attached to the inner surface of the outer bag, which is a non-breathable container (hereinafter referred to as outer temporary attachment). Outer temporary attachment means that the heating element main body and the outer bag which is a non-breathable container are in contact with each other at least partially via the re-peeling weak adhesive layer. Thereby, the movement of the heating element body on the packaging material can be prevented at least until the heating element body is folded together with the packaging material of the outer bag. Thereby, high-speed manufacture of a heating element is attained. There are no restrictions on the number, area, etc. of outer temporary wear. In the case of a heating element having a separator that protects fixing means such as an adhesive layer, the separator is also treated as a heating element.

  The heating element of the present invention may be enclosed in an outer bag or folded and enclosed in an outer bag without external temporary attachment.

The shape of the exothermic composition molded body or the section heat generating portion may be any shape, but it is a planar shape, such as a circle, an ellipse, a football shape, a triangle, a square, a rectangle, a hexagon, a polygon, a star shape, a flower shape, a ring shape, etc. Is given as an example. In three-dimensional shape, disk shape, pyramid shape, spherical shape, cubic shape, polygonal pyramid shape, cone shape, frustum shape, spherical shape, parallelepiped shape, cylindrical shape, rectangular parallelepiped shape, polyhedron shape, ellipsoid shape, Examples include a semi-cylindrical shape, a semi-elliptical cylinder shape, a bowl shape, a cylindrical shape, and an elliptic cylinder shape.
Further, in these shapes, the corners may be provided in a substantially arc shape (R shape), the corners may be curved or curved, or the center may have a recess.
In the present invention, a region corresponding to a corner (an end corner) such as an exothermic composition molded body, a heat generating portion, a segmented heat generating portion, a heat generating body, a seal portion, a through hole, a concave portion, or a convex portion is substantially arc-shaped (R ( r) shape).
Although there is no restriction | limiting in the curvature radius as this substantially circular arc shape (r (r) shape) shape, Preferably it is 0.1-20.0 mm, More preferably, it is 0.1-10.0 mm, Furthermore, Preferably it is 0.1-5.0 mm, More preferably, it is 0.3-5.0 mm, More preferably, it is 0.3-3.0 mm, More preferably, it is 0.5-2.0 mm is there.

  In the section heat generating portion structure, the section heat generating portion is formed in a unified structure having at least two facing surfaces, preferably a film layer substrate surface, wherein at least one surface is oxygen (air) permeable. When the exothermic composition molded body is accommodated, the exothermic composition molded body volume, the space volume, and the section heat generating portion volume have the following relationship. The exothermic composition molded body volume is the volume of the exothermic composition molded body itself, the spatial volume is the volume that is not occupied by the exothermic composition molded body in the section heating section, and the section heating section volume is that of the section heating section. The volume is the sum of the space volume and the exothermic composition molded body volume.

Although there is no restriction | limiting in the size of the said division | segmentation heat_generation | fever part, Preferably it is the following size.
1) In the case of disk shape and disk-like shape The diameter or maximum diameter is preferably 1 to 60 mm, more preferably 2 to 50 mm, still more preferably 10 to 40 mm, and further preferably 20 to 30 mm. . The height is preferably 0.1 to 20 mm, more preferably 0.3 to 20 mm, still more preferably 0.5 to 20 mm, still more preferably 0.5 to 10 mm, and still more preferably. It is 0.5-9 mm, More preferably, it is 0.5-8 mm, More preferably, it is 0.5-7 mm, More preferably, it is 1-7 mm. The volume is preferably about 0.0045 to 20 cm ³ , more preferably 0.2 to 11 cm ³ .
2) When the shape is other than the above 1) (rectangular, rectangular-like shape, etc.) The width is preferably 0.5 to 60 mm, more preferably 0.5 to 50 mm, still more preferably 1 to 50 mm. Yes, more preferably 3 to 50 mm, still more preferably 3 to 30 mm, still more preferably 5 to 20 mm, still more preferably 5 to 15 mm, and still more preferably 5 to 10 mm. Further, the height is preferably 0.1 to 20 mm, more preferably 0.1 to 10 mm, still more preferably 0.3 to 10 mm, still more preferably 0.5 to 10 mm, Preferably it is 0.5-7 mm, More preferably, it is 1-7 mm. Further, the length is preferably 5 to 300 mm, more preferably 5 to 200 mm, more preferably 5 to 100 mm, still more preferably 20 to 100 mm, and still more preferably 30 to 100 mm.
Further, the surface area is not limited as long as it has a function as a segmented heat generating portion, but is preferably about 50 cm ² or less, more preferably about 40 cm ² or less, and further preferably less than about 25 cm ² , and further preferably Is less than 20 cm ² .
The volume of the divided heat generating part or the volume of the exothermic composition molded body is usually 0.015 to 500 cm ³ , preferably 0.04 to 500 cm ³ , more preferably 0.04 to ³⁰ cm ³ , More preferably, it is 0.1-30 cm < ³ >, More preferably, it is 1-30 cm < ³ >, More preferably, it is 1.25-20 cm < ³ >, More preferably, it is 1.25-10 cm < ³ >, More preferably, 3 -10 cm ³ .

  The width of the section is not limited, but is preferably 0.1 to 50 mm, more preferably 0.2 to 50 mm, still more preferably 0.3 to 50 mm, and still more preferably 0.3. -40 mm, more preferably 0.4-40 mm, still more preferably 0.5-40 mm, still more preferably 0.5-30 mm, still more preferably 1-20 mm, more preferably 3 to 10 mm.

  When the exothermic composition molded body is accommodated in the segmented exothermic part, which is the exothermic composition storage area, the volume of the exothermic composition molded body, which is the exothermic composition molded area, and the exothermic composition storage area, The volume ratio with the volume of the segmented heat generating part is usually 0.6 to 1, preferably 0.7 to 1, more preferably 0.8 to 1, and further preferably 0.9 to 1. It is.

In the present invention, the section heat generating portions are provided in the form of stripes at intervals. The plurality of section heat generating portions are spaced in stripes (elongated and continuous) (parallel lines, parallel curves, etc.). ) Is provided. One streak is preferably composed of one section heat generating portion. In this case, the section heating section and the section section may be linear or curved. Moreover, as long as the following conditions are satisfied, one streak may be composed of two or more divided heat generating portions and one or more divided portions.

T ≧ 2.5S and P ≦ 0.5T

T: Length of one section heating part
S: Width of one section heating part
P: Length of the section

One example is the arrangement of streaks composed of segmented heat generating portions in parallel stripes (vertical stripes, horizontal stripes, diagonal stripes, vertical wave stripes, horizontal wave stripes, diagonal wave stripes, etc.).

  The thickness of the adhesive layer for fixing the local ventilation material is not limited as long as the local ventilation material can be fixed, but is preferably 1 to 1000 μm.

  The thickness of the pressure-sensitive adhesive layer is not limited as long as the heating element can be fixed, but is preferably 5 to 1000 μm.

  The hydrous exothermic composition of the present invention is an exothermic composition containing iron powder, a carbon component, a reaction accelerator and water as essential components. Furthermore, the surplus water value of the hydrous exothermic composition is zero.

  As the hydrous exothermic composition, an exothermic composition subjected to oxidation treatment, or an hydrous exothermic composition having activated iron powder having binding oxygen such as iron oxide or active iron powder having a carbon component at least part of the surface is also used. be able to.

  The rising temperature rising rate of the hydrous exothermic composition of the present invention is 12 ° C / 5 minutes or more, preferably 18 ° C / 5 minutes or more, more preferably 20 ° C / 5 minutes or more, and even more preferably 25. ° C / 5 minutes or more, more preferably 30 ° C / 5 minutes or more, further preferably 40 ° C / 5 minutes or more, more preferably 45 ° C / 5 minutes or more, and further preferably 50 ° C / minute. 5 minutes or more, more preferably 55 ° C./5 minutes or more, and further preferably 60 ° C./5 minutes or more.

  The rising temperature rising rate of the present invention is a difference (Te−Ts) between the temperature (Ts) at the start of the test and the temperature (Te) 5 minutes after the start of the test in the method for measuring the rising temperature rising rate.

  Moreover, the exothermic composition of this invention may contain another component other than the said component. Molding aids, functional substances, water retention agents such as wood flour and vermiculite, water-absorbing polymers such as crosslinked poly (meth) acrylic acid and poly (meth) acrylamide, hydrogen generation inhibitors such as sodium sulfite, slaked lime, etc. PH adjusters, aggregates such as fossil corals, nonions such as polyoxyethylene alkyl ethers, surfactants such as amphoteric ions, anions and cations, hydrophobic polymer compounds such as polyethylene and polypropylene, dimethyl silicone oil, etc. Far-infrared radiation materials such as organosilicon compounds, ceramics, negative ion generators such as tourmaline, pyroelectric materials, heat generation aids such as ferrous chloride, metals other than iron such as silicon and aluminum, iron oxides such as manganese dioxide Other metal oxides, acidic substances such as hydrochloric acid, maleic acid and acetic acid, fibrous materials such as pulp and cotton, urea Fuel components, humectants such as glycerin or hyaluronic acid, may contain at least one member selected from additional components consisting of the release agent or a mixture thereof. In addition, the component of the exothermic composition of this invention can select and use suitably any component of the exothermic composition conventionally disclosed or marketed or used for a well-known disposable body warmer or a heat generating body.

  The particle size of the water-insoluble solid component of the exothermic composition component of the present invention is not limited, but is preferably 700 μm or less, more preferably 300 μm or less. The smaller the particle size, the better. In particular, it is preferable to use a 0.1-300-micrometer thing. In addition, iron powder having a particle size of 120 to 300 μm, preferably 150 to 300 μm is preferable for long-term heat generation, and 5 to 40 μm, preferably 10 to 32 μm is preferable for immediate heat generation. The moldability and shape retention of the exothermic composition are improved as the particle size of the water-insoluble solid component excluding the reaction accelerator, the water-soluble substance and water is smaller. The particle size is the average measured by the maximum length or the dynamic light scattering method, the laser diffraction method, etc. in the form in which the amount passing through the sieve is indicated in μm units from the sieve opening (diameter of the sieve) etc. Refers to particle size.

The mixing ratio of the exothermic composition of the present invention is not particularly limited, but the carbon component is 0.01 to 100 parts by weight and the reaction accelerator is 0.01 to 50 parts by weight with respect to 100 parts by weight of the iron powder. The mixing ratio is preferably selected so that the water content is 0.5 to 60 parts by weight.
Further preferably, the following composition may be added to the exothermic composition with respect to the iron powder at the following blending ratio.
That is, with respect to 100 parts by weight of iron powder, water retaining agent 0.01 to 20 parts by weight, water-absorbing polymer 0.01 to 20 parts by weight, pH adjuster 0.01 to 5 parts by weight, hydrogen generation inhibitor 0.01 ~ 12 parts by weight, metals other than iron 1.0-50 parts by weight, metal oxides other than iron oxide 1.0-50 parts by weight, surfactant 0.01-5 parts by weight, hydrophobic polymer compound, bone Materials, fibrous materials, functional materials, organosilicon compounds and pyroelectric materials are each 0.01 to 10 parts by weight, moisturizers, fertilizer components and exothermic assistants are each 0.01 to 10 parts by weight, acidic substances 01 to 1 part by weight is preferred. In addition, you may make it mix | blend a magnetic body further and should just determine a mixing | blending ratio suitably as needed.

Examples of the iron powder include, but are not limited to, cast iron iron powder, atomized iron powder, electrolytic iron powder, reduced iron powder, sponge iron powder, and iron alloy powder thereof. Furthermore, these iron powders may contain carbon or oxygen, or may contain other metals, such as iron containing 50% or more of iron. Further, the iron powder may be an iron component having a fibrous form. The content of the metal other than iron is preferably 0.01 to 50% by weight, more preferably 0.1 to 10% by weight, based on the entire iron powder.
Further, the iron powder may be a mixture with other metals as long as the iron powder is 50% by weight or more. Examples of other metals include, but are not limited to, metals such as aluminum, manganese, copper, and silicon, and semiconductors. The metal of the present invention includes a semiconductor. Examples of the iron powder having a fibrous form include steel fibers, aluminum fibers, and magnesium fibers.

As the iron powder having an oxygen-containing film on at least a part of the iron surface,
A. An active iron powder in which an essential component of an exothermic composition or an acidic substance or other necessary component added thereto is contact-treated with an oxidizing gas, the iron component is partially oxidized, and the surface of the iron component is at least partially oxidized,
B. Iron powder having an iron oxide film with a thickness of 3 nm or more on the surface,
C. Active iron powder having a wustite content of 2 to 50% by weight as an X-ray peak intensity ratio of iron,
D. Non-water-absorbing base material for exothermic composition formed by molding an excess water exothermic composition containing iron powder, carbon component, reaction accelerator and water as essential components and surplus water value of 0.5-80 The exothermic precursor sandwiched between the non-water-absorbing coating material has a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day). After being enclosed in an outer bag made of a certain packaging material, in a natural environment that is not damaged, and in a controlled environment selected from an environment where the holding temperature is 1 to 80 ° C. and the holding humidity is 1 to 90% By maintaining the holding time to be at least 25 hours to 2 years, at least part of the iron component in the exothermic composition is converted to have iron oxide on at least part of the surface. powder,
E. Examples include active iron powder and a mixture of iron powder other than active iron powder.

One type of iron powder having the oxygen-containing film is iron powder in which the surface of the iron powder is covered with an iron oxide film that is an oxygen-containing film, and the iron oxide film that is an oxygen-containing film that covers the surface of the iron powder. The thickness is usually 3 nm or more, preferably 3 nm to 100 μm, more preferably 20 nm to 100 μm, still more preferably 30 nm to 100 μm, still more preferably 30 nm to 50 μm, using Auger electron spectroscopy. More preferably, it is 30 nm-1 micrometer, More preferably, it is 30 nm-500 nm, More preferably, it is 50 nm-300 nm. By making the thickness of the iron-containing film of iron 3 nm or more, the thickness of the iron-containing film of iron can exert the effect of promoting the oxidation reaction, and contact the oxidizing gas such as air to immediately start the oxidation reaction. Can be started. If the thickness of the iron oxygen-containing coating is 100 μm or more, the heat generation time may be shortened, but it can be used depending on the application.
Another type of iron powder having an oxygen-containing film is active iron powder having wustite, and the amount of wustite is usually 2 to 50% by weight as an X-ray intensity ratio with iron, preferably 5. 01 to 50% by weight, more preferably 5.01 to 40% by weight, still more preferably 6 to 40% by weight, still more preferably 7 to 30% by weight, still more preferably 7 to 25% by weight. %. Even if it exceeds 50% by weight, the heat build-up is good, but the heat generation duration is shortened. When it is less than 2% by weight, the heat build-up becomes dull. The amount of wustite was evaluated using an X-ray analyzer as a ratio of the integrated intensity of the peak of wustite 220 to the integrated intensity of the peak of 110 face of iron.

  The carbon component is not limited as long as it is a carbonaceous material. Examples include activated carbon (coconut shell charcoal, charcoal powder, calendar bituminous coal, peat, lignite), carbon black, acetylene black, graphite, carbon nanotube, carbon nanohorn, and the like. Moreover, the thing of fibrous forms, such as activated carbon fiber, can also be used.

  The reaction accelerator is not limited as long as it can accelerate the exothermic reaction. Examples include inorganic electrolytes such as sodium chloride, potassium chloride, and calcium chloride. The electrolyte currently used for the well-known disposable warmer and a heat generating body can also be used. These reaction accelerators are not subject to the above particle sizes.

The water-absorbing polymer is not particularly limited as long as it has a crosslinked structure and has a water absorption ratio of 3 times or more with respect to its own weight. Moreover, what cross-linked the surface may be used. Conventionally known water-absorbing polymers and commercially available products can also be used.
Examples of the water-absorbing polymer include a crosslinked poly (meth) acrylic acid, a crosslinked poly (meth) acrylate, a crosslinked poly (meth) acrylate having a polyoxyalkylene group, and a poly N-vinylcarboxylic acid amide. Examples include a crosslinked body, a polyvinyl alcohol-based crosslinked body, a poly (meth) acrylamide crosslinked body, and the like. These may be used alone or in combination of two or more.

  The molding aid, in combination with moisture, improves the strength of the water film, strengthens the aggregation between the composition material particles of the exothermic composition such as iron powder, improves the strength of the exothermic composition molded body, There is no limitation as long as the maintenance of this can be strengthened, but there are water-soluble polymers, hydrophilic polymers, inorganic compounds, and the like. Cellulose-based, starch-based, poly (meth) acrylic acid (salt, ester) -based, syrup-based, seaweed, plant mucilage, microbial mucilage, protein-based, polysaccharide-based, organic-based, inorganic-based, synthetic-based, Examples thereof include polymer molding aids and the like. For example, cellulose derivative-based molding aids such as carboxymethylcellulose (CMC), sodium carboxymethylcellulose, ethyl acetate, hydroxymethylcellulose, starch-based water absorbents such as dextrin, pregelatinized starch, and starch for processing, and polyacrylic such as sodium polyacrylate Syrups such as acid salts, corn syrup, and mannit syrup, seaweed extracts such as carrageenan and agar, plant resin mucous substances such as gum arabic, trant gum, caraya gum, mucous substances produced by microorganisms such as xanthan gum, jiylang gum, bull run, guard run, Polysaccharide thickeners such as gelatin, albumin, casein and other animal proteins, soy protein, wheat protein and other plant proteins, pectin, arapinogalactan and other plant fruit mucilages, locust peanut gum, tamarin Plant seed mucous substances such as seed gum and tara gum, alginates such as sodium alginate, gum arabic, tragacanth gum, locust pea gum, guar gum, gum arabic, pectin, corn starch, etc., bentonite, montmorillonite, kaolin, sodium silicate, aluminum silicate Inorganic, such as stearate, polyethylene oxide, polyvinyl alcohol, polyvinyl pyrrolidone, polyvinyl acetate emulsion, acrylic sulfonic acid polymer, poly N-vinylacetamide, or methylcellulose, hydroxypropylmethylcellulose, hydroxypropylcellulose, methylcellulose, Maleic anhydride copolymers such as carmellose sodium, carboxyvinyl polymer, ethylene-maleic anhydride copolymer, acrylic Acid - starch copolymer, microcrystalline cellulose, alone N- vinylacetamide copolymer, or a combination of two or more, and the like as an example. Conventionally known water-soluble polymers and thickeners can also be used.

  The content of the molding aid is not limited as long as the heat generation performance is not significantly reduced, but is preferably 0.001 to 2 parts by weight, more preferably 0.001 to 100 parts by weight with respect to 100 parts by weight of the iron powder. 1.5 parts by weight, more preferably 0.001 to 1 part by weight, still more preferably 0.01 to 1 part by weight, still more preferably 0.01 to 0.5 part by weight, Preferably it is 0.01-0.2 weight part, More preferably, it is 0.01-0.1 weight part, More preferably, it is 0.01-0.099 weight part, More preferably, it is 0.01 It is -0.095 weight part, More preferably, it is 0.02-0.095 weight part, More preferably, it is 0.05-0.090 weight part.

The functional substance may be any substance as long as it has some function such as medicinal effect and aroma. Perfumes, herbs, herbs, Chinese medicines such as kakkonto, oils such as safflower oil, dried plants such as mugwort and loquat leaves and mogusa, transdermal drugs, pharmaceutically active substances, fragrances, lotions, emulsions, Examples include poultices, fungicides, antibacterial agents, bactericides, deodorants or deodorizers, magnetic materials, and the like.
Furthermore, specific examples of functional substances include catechins, acidic mucopolysaccharides, chamomiles, horse chestnuts, vitamin E, nicotinic acid derivatives, blood circulation promoters such as alkaloid compounds; horse chestnuts, flavone derivatives, anthocyanidins , Vitamin P, Kinsenka, Silanol, Terminaria, Mayus, etc. swelling improver; aminophylline, tea extract, caffeine, xanthene derivative, inosit, dextran sulfate derivative, horse chestnut, escin, anthocyanidin, organic iodine compound, hypericum grass, horsetail , Slimming agents such as mannenrou, ginseng, hyanoreuronidase; analgesics such as indomethacin, camphor, ketoprofen, shoga extract, pepper extract, methyl salicylate, glycol salicylate; Vendors, rosemary, citron, juniper, menthol, nutmeg, turpentine oil, cedar embryo oil, hinoki thiol oil, peppermint, eucalyptus, rosewood, orange and other fragrances, hyaluronic acid and glycerin and other moisturizers. Can be used.

  The percutaneously absorbable drug is not particularly limited as long as it is percutaneously absorbable. For example, skin stimulants, analgesic anti-inflammatory agents such as salicylic acid and indomethacin, central nervous system agents (sleep sedatives, Antiepileptics, neuropsychiatric agents), diuretics, antihypertensives, lotus vasodilators, antitussives, antihistamines, arrhythmic agents, cardiotonic agents, corticosteroids, local anesthetics, and the like. These drugs are used alone or in combination of two or more as required.

  The packaging material constituting the base material, covering material, covering material, local ventilation material and support of the present invention is not limited as long as it functions as a packaging material for a heating element. The packaging material may have a single-layer structure or a multilayer structure, and the structure is not limited. Moisture permeable packaging material, non-breathable packaging material, breathable packaging material, non-breathable packaging material, water absorbent packaging material, non-water absorbent packaging material, stretchable packaging material, elastic packaging material, polyurethane foam, polystyrene foam, etc. Examples of such foam packaging materials, heat-sealable packaging materials having a heat-sealing layer, and the like include films, sheets, nonwoven fabrics, woven fabrics, and the like, and composites thereof, which can be appropriately used depending on a desired application. Examples thereof include films, nonwoven fabrics, woven fabrics, sheets and the like, or combinations thereof. Specific examples include polyolefins such as polyethylene and polypropylene, polyesters, polyamides, polyurethanes, polystyrenes, thermoplastic resins such as polyethylene-vinyl acetate copolymers, synthetic resins, papers, natural rubber, recycled rubber, synthetic rubber, Examples include films, sheets, non-woven fabrics, woven fabrics, foams, non-water-absorbing papers that have been non-water-absorbing treated with wax, oil, and the like, and composites thereof. . Any packaging material disclosed or commercially available or used for known disposable warmers or heating elements can be appropriately selected and used.

The surface in contact with the skin including the base material, covering material, support, and local ventilation material of the present invention preferably has a good texture and is made of a flexible material.
A texture material may be disposed on the outermost surface of the heating element. There is no restriction | limiting in the fixing method to the heat generating body of a texture material, The single side | surface of a heat generating body may be sufficient, and both surfaces may be sufficient. Further, a surface material may be arranged and integrated in advance on the outermost surface of the base material or the covering material. The heat generating element may be fixed only at the peripheral part, and the central part may or may not be fixed, or may be fixed to the entire surface of the heat generating element. A base material, a covering material, and a surface material may be prepared separately and provided when the heating element is manufactured. There are no particular restrictions on the material and manufacturing method of the surface material in consideration of the breathability and the retention of functional substances according to the application.
Examples of materials and textures constituting the surface include polyolefins such as polyethylene and polypropylene, polyesters, polyamides, polyurethanes, polystyrenes, polyethylene-vinyl acetate copolymers, synthetic resins such as polyethylene terephthalate, plant fibers such as cotton and hemp, Examples include non-woven fabrics and fibers using animal fibers such as wool and silk, recycled fibers such as rayon and cupra, semi-synthetic fibers such as acetate, textile materials such as Japanese paper, western paper, synthetic paper, cloth, woolen fabric, leather materials, etc. As mentioned.
In particular, non-woven fabrics made of synthetic fibers, natural fibers or composite fibers thereof can be mentioned. The non-woven fabrics can be produced by a spunbond method, a needle punch method, a spunlace method, a melt blow method, a flash spinning method, an airlaid method, an air-through method. And the papermaking method. The air-through method and airlaid method are preferable from the viewpoint of imparting softness and flexibility, and the spunlace method is preferable from the viewpoint that various fibers can be used and the applicability is high. The nonwoven fabric can also be used. These can be used alone or in a stack of a plurality.

The basis weight of the texture material is preferably 5.0 to 200 g / m ² , more preferably 10 to 100 g / m ² .

  In the present invention, the base material is usually composed of a non-breathable packaging material, and the covering material is composed of a breathable packaging material. However, the exothermic composition or the packaging material on which the exothermic composition molded body is laminated is the base material, and the exothermic composition. The packaging material to be put on the molded article is a covering material, and it does not matter whether air permeability is present or not. The base material may be made of a breathable packaging material, and the covering material may be made of a non-breathable packaging material. As the heating element, at least a part of the heating element only needs to have air permeability. The breathability of the container constituting the heating element can be obtained by using a breathable packaging material on one or both sides of the container.

The packaging material of the base material and the coating material used for the production of the heating element and the heating precursor of the present invention is substantially planar.
In the present invention, the term “substantially planar” means a flat surface that does not have storage recesses such as storage pockets, storage compartments, and storage areas that are provided in advance to store the exothermic composition. Accordingly, irregularities that do not intentionally contain the exothermic composition may exist. The pocket of the present invention is a storage pocket provided in advance in the packaging material for storing the exothermic composition, and is a pocket as described in JP-T-2001-507593. Since the irregularities that are not intended for storing the intentionally exothermic composition molded body are not pockets, even if such irregularities are present in the substrate, a substantially planar substrate is obtained. The storage compartment is a storage compartment provided in advance for the packaging material in order to store the exothermic composition. The storage compartment is described in Japanese Patent No. 316160 and Japanese Patent Publication No. 11-508314. It is a parcel. Since the unevenness | corrugation which is not for storage of the intentional exothermic composition molded object is not a storage division, even if such an unevenness | corrugation exists in a base material, it is set as a substantially planar base material. The storage area is a storage area provided in advance for the packaging material to store the exothermic composition. The storage area is described in Japanese Patent No. 316160 and Japanese Patent Publication No. 11-508314. Is an area. Since the unevenness that is not intended for storing the intentionally exothermic composition molded body is not a storage area, even if such unevenness is present in the base material, it should be a substantially planar base material.

The air permeability of the breathable packaging material, the heat generating portion, and the segmented heat generating portion is a water vapor transmission rate according to the Lissy method (JIS K-7129A method), preferably 50 to 10,000 g / (m ² · day), more preferably. Is 100 to 5,000 g / (m ² · day), more preferably 100 to 2,000 g / (m ² · day), and still more preferably 100 to 1,000 g / (m ² · day). Yes, more preferably 100 to 600 g / (m ² · day), and still more preferably 150 to 500 g / (m ² · day). If the moisture permeability is less than 50 g / (m ² · day), the amount of heat generation is reduced, and a sufficient heating effect cannot be obtained, which is not preferable for normal heating element use, while 10,000 g / (m Exceeding ² · day) is not preferable because the heat generation temperature becomes high and there is a possibility that a safety problem may occur. However, depending on the application, it is not limited to use at a moisture permeability exceeding 10,000 g / (m ² · day) or depending on the case, close to an open system.

Although there is no restriction | limiting in the layer structure of the said base material and coating | covering material, It is preferable that it has a four-layer structure from a single layer structure.
The base material is a non-woven film / porous film two-layer structure, a non-breathable film / non-woven cloth two-layer structure, a non-breathable film / adhesive layer / separator three-layer structure, a non-breathable film / non-woven cloth / adhesive layer For example, a four-layer structure of / separator and a four-layer structure of separator / breathable pressure-sensitive adhesive layer / nonwoven fabric / porous film may be mentioned.
Examples of the covering material include a two-layer structure of nonwoven fabric / porous film, a two-layer structure of nonwoven fabric / perforated film, and a four-layer structure of separator / breathable pressure-sensitive adhesive layer / nonwoven fabric / porous film. The base material is a packaging material on which the exothermic composition molded body is laminated, and the covering material is a packaging material that covers the exothermic composition molded body. In the base material or the covering material, air permeability and non-air permeability can be arbitrarily selected. The adhesive layer is composed of an adhesive.

  The breathable packaging material is not limited as long as it has breathability. For example, a porous film, a perforated film in which fine holes are provided by perforation of a needle or the like in a non-breathable film such as a polyethylene film and the like, a nonwoven fabric, a mesh film, a woven fabric, papers, and a laminate including them A non-breathable packaging material in which a polyethylene film is laminated on a non-woven fabric, which has air permeability by providing fine holes using a needle, etc., a non-woven fabric in which fibers are laminated and thermo-compressed to control breathability, Examples thereof include films and sheets such as a porous film, a mesh film, or a laminate in which a nonwoven fabric or a mesh film is laminated on a porous film via a breathable adhesive layer or a breathable adhesive layer. Although only one layer of the air-permeable packaging material may be used, the use of a plurality of layers can provide effects such as concealing the color of the heating element and preventing surface precipitation of the fallen powder.

  The porous film is not limited, but is a polyolefin resin such as polyethylene, linear low-density polyethylene or polypropylene, a fluorine resin such as polytetrafluoroethylene, and an inorganic material such as calcium sulfate, barium sulfate, or titanium oxide. A porous film provided with micropores by interfacial peeling of a mixed sheet with a filler can be selected as appropriate.

Examples of the nonwoven fabric include, but are not limited to, thermoplastic resins such as rayon, nylon (polyamide), polyester, acrylic, polypropylene, vinylon, polyethylene, polyurethane, and cupra, cotton, cellulose, synthetic pulp, wood pulp, non-wood pulp, Examples include semi-synthetic fibers such as rayon and acetate, dry nonwoven fabrics, wet nonwoven fabrics, spunbonds, and spunlaces formed from vinylon fibers and polyester fibers. The nonwoven fabric which consists of composite fiber of a core sheath structure may be sufficient. The nonwoven fabric on the surface in contact with the skin is preferably a brushed (fluffed) nonwoven fabric. Moreover, a stretchable nonwoven fabric and a non-stretchable nonwoven fabric can also be used. Non-woven fabrics such as thermal bond nonwoven fabric (texture), air-through nonwoven fabric (texture) / two-layer laminate of polyethylene porous film, spunbond nonwoven fabric (strength) / melt-blown nonwoven fabric (venting and leak prevention) Examples include various nonwoven fabrics such as a nonwoven fabric laminate such as a three-layer laminate of thermal bond nonwoven fabric (texture).
The air-through nonwoven fabric is made of a core-sheath type composite fiber having polyethylene terephthalate as a core and polyethylene as a sheath.
An example of the thermal bond nonwoven fabric is a core-sheath composite fiber having polyethylene terephthalate as a core and polyethylene as a sheath as a raw material.
Examples of the melt blown nonwoven fabric and the spunbond nonwoven fabric include polypropylene as a raw material.

The non-breathable packaging material is not limited as long as it is non-breathable. Polyethylene, polypropylene, nylon, vinyl chloride, vinylidene chloride, acrylic, polyester, polyvinyl alcohol, ethylene-vinyl acetate copolymer and other films, sheets, coatings and laminates thereof, and metals such as aluminum Examples thereof include a laminate of metal (including semiconductor) compounds such as silicon oxide and a composite packaging material using them. Examples of the metal compound containing a semiconductor include silicon oxide layers, oxides such as aluminum oxide, silicon oxynitride, and silicon nitride, nitrides, and oxynitrides.
Examples of the non-breathable packaging material include films of various plastic materials such as polyethylene, polypropylene, vinyl chloride, vinylidene chloride, polyethylene terephthalate, and nylon, and K coats (chlorinated chloride) such as KOP (vinylidene chloride coated biaxially oriented polypropylene film). Vinylidene coat) film, vapor-deposited film (silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, silicon oxynitride and other metal compounds such as oxygen and nitrogen, or films deposited with metal such as aluminum), nonwoven fabrics and various films An example is a single layer such as a laminate, or a laminated film or sheet containing these.
Furthermore, PE / adhesive, PP / adhesive, PET / adhesive, PE / nonwoven fabric / breathable adhesive, PE / nonwoven fabric / PE / adhesive, PE / PET / M / PE / nonwoven fabric / breathable adhesive, Examples include PE / heat seal material, PE / nonwoven fabric / heat seal material, PE / nonwoven fabric / PE / heat seal material, PE / PET / M / PE / nonwoven fabric / heat seal material, and the like. Here, PE is a polyethylene film, PET is a polyethylene terephthalate film, M is a metal such as aluminum or silver, or a semiconductor such as silicon oxide, silicon oxynitride, silicon nitride, or aluminum oxide, or an oxide of metal, oxynitride, or nitride. It is a metal compound which shows.

The non-breathable packaging material is not limited as long as it is a non-breathable packaging material, but the moisture permeability is preferably less than 50 g / (m ² · day), more preferably 30 g / (m ^2. · day) or less, still more preferably at 10g ^/ (m 2 · day) or less, more preferably from ^{0.1~10g / (m 2 · day)} , more preferably, 0.1 to 6 0.0 g / (m ² · day).

  The paper is not particularly limited as long as it is water-absorbing paper. For example, tissue paper, crepe paper, thin paper such as craft, liner paper, cardboard core, thick paper such as a coat pole, or 1 type, or 2 or more types of these laminated bodies are mentioned. It can be used if it is not in direct contact with the hydrous exothermic composition.

  Examples of the stretchable packaging material include a film, a sheet, a nonwoven fabric, a woven fabric, or a laminate thereof that extends 1.005 times or more of the original length without being damaged when a tensile force is applied. . It does not matter whether this tensile force is removed or not. Extensibility also includes stretchability. Textiles, films, spandex yarns, yarns, strings, natural rubber, synthetic rubber, elastomers, stretchable shape memory polymers, etc., mixed products of these and non-stretchable materials, mixed papers, and combinations thereof Examples include flat plates, strands, ribbons, tapes, slit films, scrim structure elastic bodies, foams, non-woven fabrics, or composite stretchable materials by laminating them or non-extensible or non-stretchable materials. As mentioned. A packaging material provided with staggered cuts is also an example of an elastic packaging material.

  Further, the packaging materials such as the stretchable packaging material and the stretchable packaging material are described as packaging materials constituting the band of Japanese Patent Application Laid-Open No. 2002-54012. Incorporate

The heat seal material constituting the heat seal layer may be a single material or a composite material having a heat seal layer, and is not limited as long as at least a part thereof can be joined by heating.
For example, polyolefins such as polyethylene and polypropylene, and olefin copolymer resins, ethylene-vinyl acetate copolymer resins, ethylene hot-melt resins such as ethylene-acrylic acid ester copolymer resins such as ethylene-isobutyl acrylate copolymer resins, Examples thereof include thermoplastic resins such as polyamide hot melt resins, butyral hot melt resins, and polyester hot melt resins, and films and sheets thereof. Moreover, what mix | blended various additives, such as antioxidant, can also be used for hot-melt-type resin and its film and sheet | seat. In particular, low density polyethylene and polyethylene using a metallocene catalyst are useful.

Of the heating elements of the present invention, it is preferable to provide a texture material for the heating elements that value the texture. The same applies to the exothermic precursor. An eye temperature heating element, a face temperature heating element, etc. are mentioned as an example. The texture material of the present invention is not limited as long as the texture is good, and the transparency and breathability are not questioned. In consideration of 1) good texture, 2) high strength, 3) prevention of powder leakage from the heat generating part, etc., it may be appropriately selected from various packaging materials according to the application.
When air permeability and moisture permeability are controlled in the base material and the covering material, it is preferable that the air permeability and moisture permeability of the texture material are high. For example, a texture material having a moisture permeability exceeding 5000 g / (m ² · 24 hr). The texture material of the present invention may be incorporated into a base material or a coating material. The soft non-woven fabric is preferable.

  In the exothermic precursor of the present invention, it is also conceivable to form a storage body (partitioned heat generating portion) with a breathable wrapping material and a non-breathable wrapping material in advance, and provide a local ventilating material, followed by bonding with a ventilation blocking sheet. However, in the manufacturing process, first, a breathable local ventilation material and a ventilation blocking sheet are laminated to prepare a composite sheet in advance, and then the composite sheet and the non-breathable sheet are bonded together to provide the ventilation blocking sheet. The generated exothermic precursor may be produced.

  The breathable packaging material or the texture material can be used on a part, one side or both sides of the heating element.

  In the present invention, a pressure-sensitive adhesive is used before heat-sealing the base material and the covering material, and preferably, the base material and the covering material are temporarily attached using a breathable pressure-sensitive adhesive layer made of an adhesive. After forming, heat sealing may be performed. The heat seal part has at least a part of an area composed of an adhesive and a heat seal material constituting the temporary attachment part. There is no wrinkle, no seal breakage, and reliable heat sealing can be achieved. Thereby, the speed of heat sealing can be increased.

  The fixing means is not limited as long as it has a fixing capability capable of fixing the heating element to a required portion. Furthermore, the fixing means is preferably removable. Adhesive layers, key hooks, hook buttons, hook-and-loop fasteners such as Velcro (registered trademark), magnets, bands, strings, ear hooks, and combinations thereof, which are generally employed as the fixing means, are arbitrarily selected. Can be used for In the case of a band, the adjustment fixing means may be further configured by a combination of a hook-and-loop fastener and an adhesive layer. There are no restrictions on the installation method, installation location, installation pattern, and the like of the fixing means, and it may be determined as appropriate, and it is preferably provided at least at a part of the exposed portion of the heating element. Moreover, you may provide a separator to a fixing means as protection until it is used. The separator may be provided with a notch such as a back split to facilitate its peeling. The fixing means of the present invention can be used by appropriately selecting fixing means (including attachment means that can be removed) that have been disclosed in the past, are commercially available, or are used for known disposable warmers and heating elements.

The pressure-sensitive adhesive layer is composed of a pressure-sensitive adhesive. The pressure-sensitive adhesive is not limited as long as the heating element can be fixed, and those conventionally used for chemical warmers, heating elements and poultices, and those technically disclosed can be used.
The pressure-sensitive adhesive constituting the pressure-sensitive adhesive layer is not particularly limited as long as it has an adhesive force necessary for adhering to the skin and clothes, and is solvent-based, aqueous-based, emulsion-type, hot-melt-type, and reactive. Various forms such as a pressure-sensitive system, a non-hydrophilic adhesive, a mixed adhesive, a hydrophilic adhesive (gel, etc.) are used. Moreover, as an adhesive layer, even if it has air permeability, it may not have air permeability. What is necessary is just to select suitably according to a use. Examples of the air-permeable pressure-sensitive adhesive layer include a pressure-sensitive adhesive layer in which the pressure-sensitive adhesive is partially present and the whole region is air-permeable, for example, a mesh-shaped pressure-sensitive adhesive layer or a stripe-shaped pressure-sensitive adhesive layer. The pressure-sensitive adhesive may be laminated as it is on the breathable base material and / or the covering material, or the pressure-sensitive adhesive laminated on the separator may be attached to the base material and / or the covering material.

  Examples of the adhesive constituting the non-hydrophilic adhesive layer include acrylic, urethane, rubber, silicon, polyisoprene, polyisobutene, styrene-isoprene-styrene (SIS), styrene-isoprene, and the like. Each pressure-sensitive adhesive can be used. In particular, acrylic or styrene-containing systems that can be hot-melt processed are preferably used. As the styrene-containing pressure-sensitive adhesive, a styrene-butadiene-styrene block copolymer (SBS), a styrene-isoprene-styrene block copolymer (SIS), or a hydrogenated type thereof (SEBS, SIPS) or the like is used as a base polymer. An example is a styrenic hot melt pressure sensitive adhesive.

  The hydrophilic pressure-sensitive adhesive constituting the hydrophilic pressure-sensitive adhesive layer is not particularly limited as long as it has adhesiveness with a hydrophilic polymer or a water-soluble polymer as a main component and is hydrophilic as the pressure-sensitive adhesive. Specifically, hydrophilic polymers such as polyacrylic acid, water-soluble polymers such as sodium polyacrylate and polyvinylpyrrolidone, and the like are listed as examples.

  At least a part of the exposed portion of the heating element and the pressure-sensitive adhesive layer is a water retention agent, a water-absorbing polymer, a pH adjuster, a surfactant, an organosilicon compound, a hydrophobic polymer compound, a pyroelectric material, an antioxidant, a bone You may contain at least 1 type chosen from the additional component which consists of material, a fibrous material, a moisturizer, a functional substance, or these mixtures.

The intermittent cut according to the present invention includes a cut portion and a connecting portion (between the cut portion and the cut portion) penetrating therethrough. There are no restrictions on the shape, type, size (length, width, etc.), and combinations of these intermittent cuts, cuts, and joints. You may provide a notch in this intermittent notch.
The intermittent incision shapes are: (a) alternate notches, (b) straight notches (perforations), (b) alternate notches with V notches, (b) straight notches with V notches (perforated notches with V notches). ) Etc. are mentioned as an example. The V notch may be changed to another notch such as a U notch or an I notch.
At least one end of intermittent cuts such as perforations and staggered cuts of the present invention may or may not be in contact with at least one side of the heating element and at least one notch.

  The installation location and number of intermittent cuts in the heating element of the present invention can be provided in any number in any region other than the segmented heat generating portion, but the segmented portion is preferable as the installation region. Further, the cut provided in the heating element having the separator may be a cut that penetrates the separator, or may be a cut that does not penetrate the separator.

  In the perforated perforations and alternate cuts, which are a kind of the intermittent cuts, the cut portions are preferably longer than the joint portions. Further, this is not the case when hand cutting is possible depending on the type of packaging material, the bendability is improved, and the case where expansion and contraction is possible. Further, this is not the case in the vicinity of the end of the intermittent notch or the side of the heating element. Each length may be selected in consideration of the type of packaging material, the vicinity of the side of the heating element, the position of the perforation such as the vicinity of the notch, and the like.

  The perforations of the present invention are usually in a single row, but can be selected according to the application, such as providing a plurality of adjacent rows, providing them in parallel, providing them in a staggered manner, and combinations thereof.

The alternate cuts of the present invention are two or more intermittent cuts arranged alternately. There are a pair of intermittent cuts, each consisting of a cut portion and a connecting portion, and having at least one cut portion and a connecting portion having different arrangement periods, and pulling in at least one direction. There is no limitation as long as it is a group of intermittent cuts having one or more directions in which the intermittent cuts are deformed and at least a part of the pulling direction extends and / or expands and contracts in the pulling direction. Are arranged such that a plurality of intermittent cuts are arranged at intervals, and the arrangement cycle of adjacent intermittent cuts in one direction is different, and three rows are arranged in a staggered cut or four rows Examples of staggered cuts with a set of 5 and staggered cuts with a set of 5 rows.
When the staggered cuts are stretched, the shapes of a plurality of cuts that pass through the staggered thickness in the thickness direction change, and the staggered cuts are deformed into a network structure, so that they can expand and contract. it can.

  The extensibility of the present invention is a property that extends in the direction in which tension is applied when tension is applied, and the length after removing the tension is not limited. That is, it does not matter whether or not to return to the original state. It is displayed as an expansion rate. Extensibility includes elasticity.

  The contractility of the present invention is a property that is shorter than the length at the time of elongation when tension is removed in the stretched state. Displayed as shrinkage. The contraction property may be contracted, and it is not always necessary to contract and return to the state before extension.

  The stretchability of the present invention is a property composed of the extensibility and the contractility. Displayed in terms of elongation and shrinkage. The contraction property may be contracted, and it is not always necessary to contract and return to the state before extension.

  In the intermittent incision according to the present invention, the ratio of the incision part to the joint part (notch part / joint part) is preferably 1.0 to 30, more preferably 1.01 to 30, and still more preferably 1. 0.01 to 20, more preferably 1.1 to 20, more preferably 1.3 to 20, still more preferably 1.5 to 20, and still more preferably 1.5 to 15. More preferably, it is 1.5-10, More preferably, it is 2.0-10. This is not the case in the vicinity of the edge of the intermittent notch or the side of the heating element. The selection may be made in consideration of the type of packaging material, the vicinity of the side of the heating element, the vicinity of the notch, and the like.

The size of the cut portion is not limited, but the length is preferably 1 to 100 mm, more preferably 1 to 50 mm, still more preferably 1.5 to 50 mm, still more preferably 2 to 30 mm. More preferably, it is 5-20 mm. The width is preferably more than 0 mm, more preferably more than 0 and 5 mm or less, still more preferably 0.001 to 5 mm, still more preferably 0.001 to 4 mm, still more preferably 0.00. It is 001-3 mm, More preferably, it is 0.001-2 mm, More preferably, it is 0.001-1 mm, More preferably, it is 0.01-1 mm.
In addition, the minimum value of the width | variety of a linear notch part does not have a restriction | limiting, What is necessary is just to cut | disconnect. More preferably, as described above.
The size of the connecting portion, which is the interval between adjacent cut portions in the extending direction of the cut portion, is not limited, but the length is preferably 0.01 to 20 mm, more preferably 0.01 to 10 mm, More preferably, it is 0.1-10 mm, More preferably, it is 0.1-8 mm, More preferably, it is 0.1-7 mm, More preferably, it is 0.1-5 mm. The width is the same as the width of the cut portion.
The interval between the adjacent intermittent cuts (adjacent interval) is not limited, but is preferably 0.1 to 20 mm, more preferably 0.1 to 15 mm, and further preferably 0.1 to 10 mm. More preferably, it is 0.1-5 mm, More preferably, it is 0.5-5 mm.
When the cut portion is circular or elliptical, the length is the diameter or long axis.

The extensibility of the present invention is not limited as long as the elongation rate is greater than 1, if expressed as an elongation rate that is an extent of elongation, but it is preferably 1.005 to 10, although it depends on the application. More preferably, it is 1.01-10, More preferably, it is 1.01-5, More preferably, it is 1.01-4, More preferably, it is 1.01-3, More preferably, it is 1.01 It is -2, More preferably, it is 1.02-2, More preferably, it is 1.03-2, More preferably, it is 1.04-2, More preferably, it is 1.05-2.
Here, the extension ratio means a quotient obtained by dividing the length after extension by the length before extension. That is, the rate of elongation of the heating element = length after extension of the heating element / length before extension of the heating element.

If the shrinkage of the present invention is expressed by a shrinkage rate that is short, the shrinkage rate is not limited as long as it exceeds 1, but it is preferably 1.005 to 10 although it depends on the application. More preferably, it is 1.01-10, More preferably, it is 1.01-5, More preferably, it is 1.01-4, More preferably, it is 1.01-3, More preferably, it is 1. It is 01-2, More preferably, it is 1.02-2, More preferably, it is 1.03-2, More preferably, it is 1.04-2, More preferably, it is 1.05-2.
Here, the shrinkage rate means a quotient obtained by dividing the length at the time of extension by the length after removing the external force.
That is, the contraction rate of the heating element = the length when the heating element is extended / the length of the heating element after the external force is removed.

  With the local ventilation material of the present invention, a space is formed in at least a part of the peripheral edge of the divided heat generating part by covering the heat generating part with the local ventilation material using the difference in height between the divided heat generating part and the dividing part. And it is a packaging material which provides an air pocket at least in part of the peripheral part of a division | segmentation heat_generation | fever part. The air intake surface of the divided heat generating portion is at least a side ventilation portion facing the space portion of the divided heat generating portion. There are two types of local ventilation materials: non-breathable and breathable. By providing the air reservoir between the divided heat generating portions, the air permeability between the outside and the divided heat generating portions is adjusted, and a combined heat retaining effect is also provided. In addition, the heat generating part with a difference in height is provided on the support with a space between the heat generating parts, and the air permeability of the heat generating part is adjusted, and the scattered heat sources are used in the practical range. Surface heat generation can also be realized.

  The method for fixing the local ventilation material to the heat generating part and / or the heating element, the fixing agent such as an adhesive, the shape, and the state are not limited as long as an air pocket can be provided between at least some of the divided heat generating parts. .

  The local ventilation material is not limited as long as the ventilation of the heat generating part can be adjusted. It is preferably lower than the air permeability of the heat generating portion provided with the local air-permeable material or the air-permeable surface of the heat generating body. Breathable materials such as porous films, non-woven fabrics, films and sheets having holes by perforation, and composites such as laminates including at least one of them as part of constituent members, non-breathable films, sheets and laminates containing them Useful is a perforated film, a perforated film, perforated sheets or perforated laminates containing them. Also, in the local area of the local ventilation material, a region (ventilation hole) having a larger air permeability than the ventilation surface (ventilation hole) of the heating element body is provided in the local region of the local ventilation material so as to increase the local air permeability. The region may be substantially non-breathable, or may be kept less breathable than the breathability of the vent surface of the segmented heat generating portion to control the flow path and flow of gas such as air. Thereby, the heat insulation of a division | segmentation heat-emitting part and appropriate temperature maintenance can be performed. A laminate of a nonwoven fabric and a film is a preferred example.

  The packaging material constituting the local ventilation material is a packaging material conventionally used for a heating element or a chemical warmer (breathable container (inner bag) or non-breathable container (outer bag)) and the specification of the present invention. The air-permeable packaging material and non-breathable packaging material used for the base material, the covering material, and the outer bag described in the book can be used and may be appropriately selected.

  The ventilation blocking sheet covers at least the breathable portion of the local ventilation material, and is not particularly limited as long as it is non-breathable. The outer bag packaging material, the local ventilation material packaging material, or the disclosed or publicly known Non-breathable packaging materials such as non-breathable films and sheets used for chemical warmers and heating elements can be used. The film or sheet is adhered and adhered to the container in a peelable state by means such as an adhesive, but it is preferable to provide a knob portion so that it can be easily peeled off during use. As the local ventilation material and the band (support), the packaging material used for the base material and the covering material can be used. Also, the local ventilation material and the band (support body) are disclosed in the past, are commercially available, or are used for known disposable warmers and heating elements. Any packaging material can be appropriately selected and used.

  In this way, by adhering the ventilation blocking sheet to the ventilation surface of the local ventilation material in a peelable manner, air (oxygen) does not enter the inside of the divided heat generating portion from the ventilation surface during storage and transportation. Prevents heat generation during storage and transportation. On the other hand, since air permeability can be ensured by peeling the ventilation block sheet from the local ventilation material during use, heat can be generated by normal use. Therefore, it becomes possible to ship without individually packaging each heating element as in the past, and several heating elements can be packaged together in one packaging bag, so-called inner bags can be omitted. . In other words, even if one of them is used when packaged together, it can be stored as if each heating element was individually packaged, and without being concerned about its storage condition such as sealing after opening. Can be used.

  In the heating element of the present invention, it is also conceivable to form a storage body (section heating part) with a breathable wrapping material and a non-breathable wrapping material in advance, and provide a local ventilation member, followed by bonding a ventilation blocking sheet. However, in the manufacturing process, first, a breathable sheet and a ventilation barrier sheet are laminated to prepare a composite sheet in advance, and then the composite sheet and the non-breathable sheet are bonded together to generate heat generated by the ventilation barrier sheet. You may make a body.

“Folding” in the present invention means that at least a part of the folded portion is in contact with the region of the non-folded portion.
The ratio (A / B) of the width (A) of the section corresponding to the folded portion of the heating element and the sum (B) of the thicknesses of the section heating sections on both sides thereof is 0.5 or more, preferably 0.5-10, more preferably 0.55-10, still more preferably 0.6-10, even more preferably 0.7-10, even more preferably 1.0-10. More preferably, it is 1.2-10, More preferably, it is 1.2-5, More preferably, it is 1.2-3, More preferably, it is 2-3. Moreover, when the width | variety of the division part which corresponds to the folding part of a heat generating body differs in the one surface side and the other one surface side, let short width be the width | variety (A) of a division part.

In addition, since the heating element is enclosed in a folded state of two or more, even if the heating element is large, it is very compact in a packaged state and has excellent portability.
There is little change over time in the heat generation characteristics, and the number of members can be reduced compared to the conventional disposable body warmer, the cost can be reduced, and there is an advantage that dust generated during use can be reduced and it is friendly to the global environment. Moreover, you may enclose the division | segmentation heat generating part heat generating body of this invention, especially a stripe heat generating body in the air-impermeable storage body in the wound state.

  The packaging material for the outer bag that houses the heating element may be any material that does not substantially allow air (oxygen) to permeate. The non-breathable material or a packaging material used for a conventionally known outer bag of a heating element can be used.

  The adhesive constituting the outer temporary attachment layer used for the outer temporary attachment is not limited as long as the adhesive force is weak and the heating element can be retained in the packaging material until the folding operation is completed. A re-peelable weak pressure-sensitive adhesive is an example. In some cases, a weak adhesive may be used in place of the removable weak adhesive. Specific examples include hot-melt adhesives, emulsion-based adhesives such as acrylic adhesives, and solvent-based adhesives such as rubber-based adhesives. In particular, a compound having a high glass transition temperature is preferable. Acrylic compounds having a high ratio of acrylic acid components and rubber compounds having a high melting point tackifier are preferable. Moreover, the adhesive used for the removable sticky note sold as Post-it / Post-it (trade name of 3M Co., Ltd.) can also be used. Also, hot melt adhesives, especially hot melt adhesives (styrene adhesives such as SIS, acrylic adhesives, polypropylene adhesives, polyethylene adhesives, ethylene-propylene copolymer adhesives, etc.) preferable. Known or publicly available adhesives or adhesives with weak adhesive strength or adhesive strength can also be used.

  The adhesive strength is not limited as long as the heating element and the packaging material can be pasted until the folding work is finished, but 180 degree peel strength (JIS Z-0237) is preferable. 0.01 g / 25 mm to 0.9 kg / 25 mm, more preferably 0.01 g / 25 mm to 0.5 kg / 25 mm, still more preferably 0.01 g / 25 mm to 0.3 kg / 25 mm, More preferably, it is 0.01g / 25mm-100g / 25mm, More preferably, it is 0.1g / 25mm-100g / 25mm.

  Although there is no restriction | limiting in particular also about the application | coating thickness of the said adhesive, Preferably it is 3 mm or less, More preferably, it is 0.1 micrometer-3 mm, More preferably, it is 0.1 micrometer-2 mm, More preferably, it is 0.1 micrometer- 1 mm.

In the present invention, the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer, the adhesive layer, the setting method, the pattern and the shape of the temporary attachment layer are not limited as long as the heat generating element functions as a heat generating element. In addition, examples include various patterns and shapes such as intermittent provision, dot-like, mesh-like (mesh-like), stripe-like, lattice-like, dot-like, and band-like shapes.
As an installation method, an appropriate method such as a melt blow method, a curtain spray method, or a gravure method can be given as an example. For forming the breathable pressure-sensitive adhesive layer, for example, a hot-melt type pressure-sensitive adhesive material is blown and developed through hot air under heating and melting, and a melt-blow method or a pressure-sensitive adhesive is provided intermittently. A coating method such as a gravure method is useful.

  The material constituting the pressure-sensitive adhesive layer, the pressure-sensitive adhesive layer, the adhesive layer, and the temporary attachment layer is not limited as long as these functions can be maintained, and the pressure-sensitive adhesive, acrylic-based, epoxy-based adhesives, known warmers, A pressure-sensitive adhesive used for the heating element, a commercially available adhesive or pressure-sensitive adhesive, a known adhesive or pressure-sensitive adhesive, or the like can be used.

  The thickness of the temporary adhesive layer (adhesive layer) is not limited as long as it can be temporarily applied, but is preferably 0.1 to 1000 μm.

  The adhesive layer is composed of an adhesive, a pressure-sensitive adhesive, a heat seal material, and the like. When manufacturing a heat generating precursor and a heat generating body, the packaging material and the packaging material and / or the packaging material is fixed to the heat generating body. There is no limitation as long as the packaging material can be fixed. Examples of the constituent material include an adhesive such as a cyan adhesive, a pressure-sensitive adhesive described in the present specification, and a heat seal material.

  The adhesive layer is composed of an adhesive, and is a fixing layer for fixing a packaging material and a packaging material and / or a packaging material to the heating element when producing a heat-generating precursor or a heating element. There is no limit if it can be fixed. An example of the constituent material is the pressure-sensitive adhesive described in the present specification.

  As the constituent material of the adhesive layer, the pressure-sensitive adhesive layer, and the temporary adhesive layer, those conventionally used in chemical warmers, heating elements, and poultices, and those technically disclosed can be used.

  When heat-sealing packaging materials such as the base material and the covering material, a temporary adhesive layer composed of an adhesive, preferably a weak adhesive, on at least one heat-sealing layer in addition to a normal heat-sealing method A temporary heat sealing method may be performed in which temporary bonding is performed via a temporary bonding layer by pressing pressure, and then heat sealing is performed. In this case, the seal portion includes a layer in which the temporary adhesive layer component and the heat seal material are mixed, and a layer of the heat seal material. The temporary heat sealing method is a sealing method useful for increasing the speed of heat sealing. The heat sealing material may also serve as a packaging material such as a base material or a coating material.

The pattern, shape, installation method, and installation position of the pressure-sensitive adhesive layer, adhesive layer, pressure-sensitive adhesive layer, temporary attachment layer, and external temporary attachment layer are not limited as long as they function as an external temporary attachment layer.
Examples include various patterns and shapes such as full, partial, continuous, intermittent, single point, net (mesh), stripe, grid, dot, strip, rod, polka dot, etc. As mentioned. As an installation method, an appropriate method such as a melt blow method, a curtain spray method, a gravure method, or a solution type coating method can be given as an example. Known installation methods can also be employed.

Hereinafter, although the embodiment of a heating element of the present invention is described using Drawing 1-Drawing 13 and Drawing 19-Drawing 21, it is not restricted only to explanation with this figure.
The exothermic composition in the heating element of the present invention is an exothermic composition having an excess water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more. The loop stiffness of the storage body of the heat generating body and the storage body constituting the heat generating section composed of the section heat generating section and the sectioning section is 700 mN / cm or less.

FIG. 1A is a plan view showing an example of the segment heating part heating element 3.
This is a divided heating section heating element 3 in which twelve elliptical divided heating sections 14 are provided at predetermined intervals in the vertical and horizontal directions with the dividing section 15 interposed therebetween.
FIG. 1B is a plan view showing an example of the stripe heating element 5.
A dumbbell-shaped stripe heating element 5 having a minimum bending resistance of 60 mm or less is provided with six section heating portions 14 in a stripe shape.
Although not shown, in FIGS. 1A and 1B, a solid pressure-sensitive adhesive layer 19 with a separator 22 is provided on the base 18 side which is a non-breathable surface.

FIG. 2A is a plan view showing an example of the rigid / soft heating element 4.
FIG. 2B is a cross-sectional view taken along the line AA.
The peripheral part of the hydrous exothermic composition 12 sandwiched between the covering material 17 and the base material 18 and the peripheral part of the heating element 4 are heat-sealed, and an acrylic adhesive is applied to the other surface of the base material 18 which is a non-venting surface. The pressure-sensitive adhesive layer 19 is provided, and the separator 22 is provided thereon, and six rectangular divided heat generating portions 14 are provided in stripes with the divided portions 15 as intervals.
The bending resistance of the bending-soft heating element 4 is 70 mm or less, the minimum bending resistance change is 0, and there is no change in the flexibility before and after the heating.
A rigid and soft heating element 4 may be affixed to the outside of the garment, and heat may be transmitted to the body through the garment. The adhesive layer 19 for the body may be applied to the body so that the heat is transmitted to the body. Also good. Further, both sides may be made to be air permeable and water vapor generated from the heating element may be applied to the body side.
FIG. 2C is a cross-sectional view showing another example of the rigid and soft heating element 4.
The hydrous exothermic composition 12 is sandwiched between the base material 18 and the air-permeable covering material 17, and the peripheral portion of the hydrous exothermic composition 12 and the peripheral portion of the exothermic body 4 are heat-sealed. Six pieces of segmental heating with a rectangular planar shape, on which a breathable pressure-sensitive adhesive layer 20 made of a SIS-based hot-melt pressure-sensitive adhesive is provided on a coating material 17 and a separator 22 is provided thereon. It is a bending / soft heating element 4 having a portion 14 and having a minimum bending resistance of 50 mm or less.
The change in the minimum bending resistance of the bending-soft heating element 4 is 0 or less, and the flexibility before and after the heating is not changed.
A ventilation surface side is attached to the inside of clothes such as underwear, and heat is transmitted to the body through the non-ventilation surface of the rigid and soft heating element 4.
A rigid and soft heating element 4 may be affixed to the outside of the garment to transfer heat to the body through the garment. Alternatively, the body pressure-sensitive adhesive layer 19 may be applied to the body to transmit heat to the body. Further, both sides may be made to be air permeable and water vapor generated from the heating element may be applied to the body side.
FIG. 2D is a cross-sectional view showing another example of the rigid and soft heating element 4.
The peripheral portion of the six hydrous exothermic compositions 12 and the peripheral portion of the heating element 4 sandwiched between the base material 18 and the breathable coating material 17 are heat-sealed, and no adhesive layer is provided. It is a bending / soft heating element 4 having a bending resistance of 70 mm or less.
Although not shown in the drawing, both sides of the rigid and soft heating element 4 are made to be breathable surfaces, and a breathable pressure-sensitive adhesive layer or a partially provided breathable pressure-sensitive adhesive layer is attached to the body side, and the heating element is attached to the body side. You may make it apply the water vapor | steam generated from.

FIG. 3A is a plan view showing an example of the separable heating element 6.
Eight divided heat generating portions 14 are provided in a stripe shape, and perforated lines 26 that can be cut by hand are provided in each divided portion 15.
Further, the perforation 26 is in contact with the side of the heating element 6, but the perforation 26 may not be in contact with the side of the heating element 6 as long as it can be cut by hand.
FIG. 3B is a plan view showing an example of the small heating element 6A.
This small heating element 6A is a separated small heating element 6A having a seal portion 16 in the peripheral part of the section heating part 14 as a minimum unit of the separable heating element 6 in FIG.
FIG. 3C is a plan view showing another example of the detachable heating element 6.
A total of 16 section heat generating sections (width 8 mm × length 50 mm) 14 are provided at the top and bottom with a section 15 having a width of 9 mm as an interval.
A perforated line 26 that can be cut by hand is provided at a substantially central part of each section 15, and an end part of the perforated line 26 and a V notch 28 provided in the peripheral part of the heating element 6 come into contact with each other. Yes.
FIG. 3D is a plan view showing another example of the small heating element 6A.
The small heating element 6A is a separated small heating element 6A having a seal portion 16 in the peripheral part of the section heating part 14 as a minimum unit of the separable heating element 6 in FIG.
3 (a) and 6 (c) can be separated into a desired small heating element 6A along an arbitrary perforation 26, and several small small heating elements can be separated if desired. The area can be warmed simultaneously.

FIG. 4A is a plan view showing an example of the expandable heating element 7.
FIG. 4B is a cross-sectional view taken along the line BB.
Six divided heat generating portions 14 are provided in stripes with a separation portion 15 having a width of 7 mm as an interval, and staggered cuts 27 having three rows are formed in the central division portion 15 at intervals of 1.5 mm. Yes. A part of the alternate cuts 27 is in contact with the peripheral portion of the expansion / contraction heating element 7. The hydrous exothermic composition 12 is sandwiched between a non-breathable substrate 18 and a breathable coating material 17 provided with a pressure-sensitive adhesive layer 19 with a separator 22, and the peripheral portion is sealed. The side ventilation part 56 of the segment heating part and the top 57 of the segment heating part have air permeability. The pressure-sensitive adhesive layer 19 is a layer having a thickness of about 50 μm made of a styrene-isoprene-styrene pressure-sensitive adhesive. Since the alternating cuts 27 in the longitudinal direction, which is a direction perpendicular to the direction of the alternating cuts 27, are reversibly deformed in a substantially mesh shape, the expansion / contraction heating element 7 can be deformed in the longitudinal direction, that is, can expand and contract. It is also useful to increase the stretchability of the stretchable heating element 7 by providing alternate cuts 27 in the other section 14.

FIG. 5A is a plan view showing another example of the expansion / contraction heating element 7.
Two sets of heating sections 14 are formed as a set, and six sets are provided in stripes across a short section (width 10 mm) 15 in a stripe shape, and three rows are arranged in each short section 15. A staggered cut 27 is provided, and at least a part of the end of the staggered cut 27 abuts a V-notch 28 provided at the periphery of the heating element 7.
FIG. 5B is a plan view showing another example of the expandable heating element 7.
This is a rectangular expansion / contraction heating element 7. In the longitudinal direction, four divided heat generating portions 14 are provided with intervals of the divided portions 15 having a width of 10 mm, and three rows of staggered cuts 27 are formed in each of the divided portions 15 at intervals of 1.5 mm. Is in contact with the peripheral portion of the expansion / contraction heating element 7. Although not shown, the non-breathable base material 18 is provided with an adhesive layer 19 with a separator 22.

FIG. 6 is a plan view showing an example of the band heating element 8.
A heat generating portion 13 having six section heat generating portions 14 is fixed to a substantially central portion of a band 35, and hook and loop fasteners 21, 21, 21 are provided in different positions near both ends of the band 35. The band 35 is provided with alternate cuts 27 and 27 with the heat generating portion 13 interposed therebetween. The band 35 is a non-extensible replaceable holding member (for example, 10 to 100 cm in length × 1 to 15 cm in width) made of a laminate of a nonwoven fabric and an elastomer film. The heat generating portion 13 may be fixed at an arbitrary position of the band 35. According to this position, alternate cuts 27 are provided.
In this example, the band heating element 8 is provided with stretchability by the alternating cuts 27, but a stretchable material in which a stretchable material such as a polymer mesh (scrim) or rubber is sandwiched between the packaging materials is used for the band 35. May be.

FIG. 7A is a plan view showing an example of the tunnel ventilation heating element 9.
FIG.7 (b) is sectional drawing of CC.
The hydrous heat generating composition 12 is sandwiched between the base material 18 having the pressure-sensitive adhesive layer 19 with the separator 22 and the air-permeable covering material 17 so that the local air-permeable material 30 covers the air-permeable surface side of the six section heat generating portions 14. And fixed at both ends in the longitudinal direction by fixing portions 29 (29, such as an adhesive layer, an adhesive layer, and a heat seal layer) made of an adhesive or the like. A substantial space 31 is formed by the local ventilation member 30, the side ventilation portion 56 of the section heat generating section, and the section section 15, and air is taken in from the vent holes 32 at both ends.
If desired, the local ventilation member 30 may be provided with ventilation holes 32 by perforation or the like.
Moreover, although not shown in figure, the local ventilation material 30 may be fixed to the at least one part of the top part 57 of one or more division heat generating parts via the fixing | fixed part 29 which consists of an adhesive. In addition, the local ventilation member 30 and the partitioning portion 15 are separated in the partitioning portion 15 outside the partitioning heat generation portion 14 by combining the two partitioning heating portions 14, the one partitioning portion 15, and one or more space portions 31. May be fixed through a fixing portion 29 made of an adhesive, an adhesive, or the like, and a perforated perforation 26 may be provided at substantially the central portion thereof to form a detachable medicine heating element 10A connected to the section 15. .

FIG. 8A is a partial enlarged cross-sectional view showing an example of the vicinity of the space portion 31 of the tunnel ventilation heat generating body 9.
The hydrous exothermic composition 12 is sandwiched between the base material 18 having the pressure-sensitive adhesive layer 19 with the separator 22 and the air-permeable covering material 17, and the local air-permeable material 30 is not fixed to the section 15, and the top of the section heat generating section 57, and a single space portion 31 composed of the side ventilation portion 56 of the division heat generation portion, the division portion 15 and the local ventilation member 30 is provided in the division portion 15.
FIG. 8B is a partial enlarged cross-sectional view showing another example of the vicinity of the space portion 31 of the tunnel ventilation heating element 9.
A local ventilation material 30 is fixed to a substantially central portion of the partitioning portion 15 of the tunnel ventilation heating element 9 via a fixing portion 29 made of an adhesive, and two space portions 31 are provided in one partitioning portion 15. .

FIG. 9A is a plan view showing an example of the drug heating element 10.
FIG. 9B is a sectional view taken along the line DD.
The hydrous exothermic composition 12 is sandwiched between the non-breathable base material 18 and the breathable coating material 17 provided with the pressure-sensitive adhesive layer 19 with the separator 22, the peripheral part is sealed, and further, the segmental heat-generating part 14. And a local ventilation member 30 having a vent hole 32 perforated on an uneven surface composed of a partitioning portion 15 is fixed at all peripheral portions of the drug heating element 10 via a fixing portion 29, and the local ventilation member 30 and the division heating portion are fixed. A substantial space 31 is formed from the side ventilation portion 56 and the partitioning portion 15, and air is taken in from the ventilation holes 32 of the local ventilation material 30. The minimum bending resistance of the drug heating element 10 excluding the local ventilation material 30 is 70 mm or less. The local ventilation material 30 is a packaging material provided with a ventilation hole 32 perforated in a non-breathable packaging material. Further, the local ventilation member 30 may be fixed to at least a part of the top portion 57 of the one or more section heat generating portions via the fixing portion 29. A non-breathable substrate 18 is provided with a separator 22 and a pressure-sensitive adhesive layer 19 containing a functional substance.
FIG. 9C is a plan view showing another example of the drug heating element 10.
A non-breathable ventilation blocking sheet 33 with a handle 34 is detachably bonded to the ventilation hole 32 of the local ventilation member 30.
FIG. 9D is a cross-sectional view showing another example of the drug heating element 10.
The drug heating element 10 is provided with neither the adhesive layer 19 nor the separator 22.
The functional substance is contained in at least a part of the exposed portion of the drug heating element 10.
In the medicine heating element 10, since the base material 18 and the local ventilation material 30 are non-breathable, the interaction between the hydrous heating composition 12 and the exposed portion such as the pressure-sensitive adhesive layer 19 containing the functional substance can be prevented. The function of can be maintained.
Further, by closing the ventilation hole 32 with the ventilation blocking sheet 33, the interaction between the hydrous exothermic composition 12 and the exposed portion of the drug heating element 10 can be completely prevented, and the drug heating element 10 that can withstand long-term storage can be obtained. .

FIG. 10A is a plan view showing another example of the drug heating element 10.
FIG.10 (b) is sectional drawing of the same EE.
The hydrous exothermic composition 12 is sandwiched between the non-breathable base material 18 and the breathable coating material 17, the periphery thereof is sealed, has six divided heat generation portions 14, and the coating material 17 On the side, a pressure-sensitive adhesive layer 19 (which may be a gas-permeable pressure-sensitive adhesive layer 20) is provided, and a local ventilation material 30 having a perforated ventilation hole 32 covers the top portion 57 of the section heat generating portion, and the drug is passed through the fixing portion 29. It is fixed at the entire periphery of the heating element 10. The vent layer 32 is not provided with the pressure-sensitive adhesive layer 19 that at least blocks the ventilation. A substantial space portion 31 is formed by the local ventilation member 30, the side ventilation portion 56 of the divided heat generating portion, and the dividing portion 15, and takes in air from the ventilation holes 32 of the local ventilation member 30. The functional substance is contained on the surface of the base material 18 of the drug heating element 10. The separator 22 is preferably provided on the pressure-sensitive adhesive layer 19 (or the air-permeable pressure-sensitive adhesive layer 20).

FIG. 11A is a plan view showing an example of a separable medicine heating element 10A.
FIG.11 (b) is sectional drawing of the FF.
A local ventilation member 30 having a ventilation hole 32 perforated on the concavo-convex surface made up of the section heating section 14 and the section section 15 is fixed at the entire periphery of the detachable medicine heating element 10A via the fixing section 29, and Every other section 15 and the local ventilation material 30 are fixed via fixing parts 29. The top portion 57 of the section heat generating portion is covered with the local ventilation material 30. A perforated perforation 26 is provided at a substantially central portion of the area where the section 15 and the local ventilation member 30 are fixed, and the two section heat generating sections 14 and one section 15 are taken as a set. Three sets are connected. Each set has a substantial space 31 formed by the local ventilation member 30 with the ventilation hole 32, the side ventilation part 56 of the segmental heat generating unit, and the segmentation part 15, and air is passed through the ventilation hole 32 of the local ventilation member 30. Incorporate. The end portion of the perforated perforation 26 is in contact with the peripheral portion of the detachable medicine heating element 10A, but may be not in contact with the peripheral portion of the heating element 10A as long as it can be cut by hand.
A pressure-sensitive adhesive layer 19 containing a functional substance is provided on the substrate 18 side. The perforation 26 may or may not penetrate the separator 22 as desired. Although not shown, a V-notch 28 or the like may be provided at the end of the perforated perforation 26 in the periphery of the separable medicine heating element 10A if desired.
FIG. 11C is a cross-sectional view showing an example of the small drug heating element 10B.
This is a small medicine heating element 10B in which the detachable medicine heating element 10A is separated by a perforated perforation 26.
The water-containing exothermic composition 12 is sandwiched between the base material 18 having the pressure-sensitive adhesive layer 19 with the separator 22 and the air-permeable covering material 17, and the side ventilation portion 56, the partitioning portion 15, and the local ventilation member 30 with the ventilation holes 32. Is a small medicine heating element 10B having a space 31 composed of
At the time of use, the separable medicine heating element 10A can be divided into a plurality of small medicine heating elements 10B and pasted to a desired place as desired.

FIG. 12A is a plan view showing an example of the eye temperature heating element 60.
FIG.12 (b) is sectional drawing of the same GG.
The hydrous exothermic composition 12 is sandwiched between the non-breathable base material 18 and the breathable coating material 17, the periphery is sealed, and the ear hooks 67 and 67 with holes 68 and 68 are formed at both ends. Provided through sealed fixing parts 29, 29, a V notch 28 is provided on the upper side of the central part, and the lower side corresponding to the peripheral part of the nose is a curved surface. , 14 and 14 are provided. Further, in the eye temperature heating element 60 of the present invention, the V notch 28 may be replaced with a large V-shaped notch or a curved surface, or the like, and a notch, a curved surface, or the like may be added to the central portion.
FIG. 12C is a plan view showing another example of the eye temperature heating element 60.
The eye side 61 of the eye temperature heating element 60 is shown. The end portions of the ear hooks 67 and 67 with holes 68 and 68 provided with cuts (perforations 26) that can be cut by hand in the center are fixed portions 29 and 29 sealed at both ends of the heating element body. The V notch 28 is provided on the upper side of the central part, and the lower side corresponding to the peripheral part of the nose is a curved surface.
FIG. 12D is a cross-sectional view showing another example of the eye temperature heating element 60.
Texture materials 62 and 62 made of nonwoven fabric are provided on both sides of the eye temperature heating element 60. Space portions 31 and 31 are formed between the sorting portions 15 and 15 and the texture members 62 and 62.
At least one of the texture materials 62 may be replaced with the local ventilation material 30 or the local ventilation material 30 with the texture material 62. For example, the texture material 62 on the eye side 61 may be replaced with the local ventilation material 30 or the local ventilation material 30 with the texture material 62.
FIG. 12E is a plan view showing an example of the face temperature heating element 63.
This is a mask-shaped face temperature heating element 63. Ear hook rubber 69 which is an ear hook portion 67 is provided at both end portions, the central dividing portion 15 is wide, and three divided heat generating portions 14 are provided on both sides. The ear hook rubber 69, 69 may be replaced with an ear hook string 69.
FIG. 12F is a perspective view showing another example of the face temperature heating element 63.
This is an assembled face temperature heating element 63. The segment heating element 3 such as the stripe heating element 5 is inserted into a mask 64 having ear rubbers 69 and 69 at both ends and provided with a heating element storage 66 supported by the heating element holding part 65. To do.
If the heating element having the structure of the tunnel ventilation heating element 9 or the drug heating element 10 is used as the segment heating part heating element 3, it can be used at a more appropriate temperature.
FIG. 12G is a plan view showing an example of the nasal heating element 63A.
This is an integrated nasal temperature heating element 63A in which the heat generating portions 13 having one of the divided heat generating portions 14 are provided on both sides of the central dividing portion 15, and at least the regions corresponding to both sides of the nose can be heated.
If the heat generating part 13 is a heat generating part having the structure of the tunnel ventilation heat generating element 9 or the drug heat generating element 10, it can be used at a more appropriate temperature.
FIG. 12H is a plan view showing another example of the tunnel ventilation heating element 9 for the face temperature heating element 63 and the nasal temperature heating element 63A.
The local ventilation member 30 covers the two divided heat generating parts 14 and 14 provided with the central dividing part 15 interposed therebetween, and is fixed to both ends of the tunnel ventilation heat generating element 9 via fixing parts 29 and 29. Yes.

FIG. 13A is a plan view showing another example of the rigid / soft heating element 4 before being folded.
The central section 15 has a width that is greater than half the sum of the heights of the divided heat generating sections 14 and 14 on both sides.
FIG. 13B is a plan view showing an example of the outer temporary-folding heating element 11 with an outer bag.
FIG. 13C is a cross-sectional view taken along the line H-H.
A heating element 39 in which the rigid and soft heating element 4 is folded into two at the central section 15 with the breathable coating material 17 side inward is interposed between a part of the outer bag 36 and the outer temporary attachment layer 37. This is an outer temporary folding folded heating element 11 with an outer bag, which is temporarily attached and enclosed in an outer bag 36 which is a non-breathable storage body. The I notch 28 is provided in the seal portion 38 of the outer bag 36 and is not in contact with the peripheral portion of the seal portion 38.
FIG. 13D is a plan view showing another example of the outer temporary folding folded heating element 11 with an outer bag.
A part of the outer bag 36 and the outer temporary attachment layer 37 are temporarily attached, and the folded heating element 39 is enclosed in the outer bag, and an I notch 28 is provided in the seal portion 38 of the outer bag 36, One end is provided in contact with the outer peripheral portion of the seal portion 38 of the outer bag 36. Although not shown, the I notches 28 may be replaced with alternate cuts 27. You may provide in the one part area | region in the seal | sticker part 38 of one side of the outer bag 36, or all the areas.

FIG. 19 is a cross-sectional view showing the flexibility of the rigid / soft heating element 4.
The rigid and soft heating element 4 having six divided heat generating portions protruding from the support base 55 is bent from the middle and is in contact with the oblique side of the support base 55, and exhibits high flexibility.

FIG. 20 is a cross-sectional view showing the inflexibility of the single heating element heating element 2.
The single heating part heating element 2 that is a commercially available sticker that protrudes from the support base 55 extends in the protrusion direction, does not contact the oblique sides of the support base 55, and is not flexible.

FIG. 21A is a plan view showing an example of staggered cuts 27 that are a kind of intermittent cuts 23. Three rows of the cuts 24 are staggered cuts 27 longer than the connecting portions 25.
FIG. 21B is a plan view showing an example of a perforation 26 which is a kind of intermittent cuts 23. The cut portion 24 is a perforation 26 longer than the connecting portion 25.
This is preferable for use in hand cutting.
FIG. 21C is a plan view showing another example of a perforation 26 which is a kind of intermittent cuts 23. The cut portion 24 is a perforation 26 having the same length as the connecting portion 25.

In the physical properties of the heating element of the present invention, a plurality of storage bodies, heating precursors, and heating elements manufactured using the same heating composition and the same packaging material are regarded as one group, and the group has the same physical properties. Suppose that Based on this, the physical properties of the individual storage bodies, exothermic precursors, and exothermic bodies are defined. That is, when a plurality of physical properties cannot be measured and collected from the same sample, a plurality of samples are taken out from one group and measured, and the combined physical properties are taken as the physical properties of each sample belonging to the group.
The “manufactured using the same heating composition and the same packaging material” includes a plurality of heating elements having the same manufacturing number. The heating elements with the same serial number have the same physical properties and characteristics.

The plurality of heating elements having the same serial number is
1. 1. A heating element having the same production number selected from the group consisting of two or more heating elements. 2. A heating element that is not assigned a serial number and is selected from the group consisting of two or more heating elements manufactured using the same raw material and the same packaging material. When the surplus water exothermic composition having an excess water value exceeding 0 is used, the production number of the heating element (exothermic precursor) containing the surplus water exothermic composition is adopted.

   The production number is a production number assigned to any of a heating element, an outer bag of a heating element housed in an outer bag, and a collective bag having two or more heating elements such as pillow packaging and a box, or the like. Corresponding numbers, symbols, lot numbers, production lots, barcodes, etc., and information such as production year, month, and manufacturing machine. There are no restrictions as long as a plurality of heating elements are collected and the numbers and symbols are clear. For example, S10 2437, 7B08, 510264-, and the like.

As an example, taking a sample group with the same serial number as an example, physical property measurement will be described.
First sample, second sample, and third sample are selected from the sample group, and the first sample measures the excess water value and rising temperature rise rate of the exothermic composition before exotherm, and the loop stiffness of the container . The second sample measures the loop stiffness of the container after the end of heat generation. The third sample measures the minimum bending resistance before heat generation and the minimum bending resistance after heat generation. However, the minimum bending resistance before heat generation may be measured with the third sample, and the minimum bending resistance after heat generation may be measured with the fourth sample.
As the number of samples, the number of first samples is 1 or more, preferably 2 or more, more preferably 3 or more. The number of second samples is 1 or more, preferably 2 or more, and more preferably 3 or more.
It is preferable to use the arithmetic average of the number of samples for each sample value such as surplus water value, loop stiffness, minimum bending resistance.

  The thickness of the heating element is measured by measuring three or more points using a caliper and obtaining an average value.

  The end of “open the end of the divided heat generating portion of the heating element after the end of heat generation” indicates at least one of one end or both ends of the divided heat generating portion.

1. Loop stiffness measurement
A circular loop with a loop length of 50 mm is formed near the center of a strip-shaped sample having a width of 0.5 to 1 cm, preferably 1 cm and a loop length of 50 mm or more, and the load applied when the circular loop is pushed in from the outside by 5 mm is applied to the sample width. The value displayed in mN / cm is defined as loop stiffness.
If necessary, it is converted with 1 gF≈9.8 mN.
That is,
Loop stiffness [mN / cm] = Measured loop stiffness [mN]
/ Width of measurement sample [cm]

The number of measurement points is 1 point or more, preferably 2 points or more, and more preferably 3 points or more.

2. Sample for measurement of loop stiffness 1) Open the end of the segment heating element of the sample heating element of the heating element storage body before heat generation, take out the water-containing heating composition, and generate the segment heating that is the non-sealed area of the remaining storage body A section of the storage body cut in the longitudinal direction of the region including the seal portion at the peripheral portion of the heating element in a direction that passes through the section portion which is the partial region and the seal region substantially orthogonally is used as a sample.
2) Sample of storage body of heating element after completion of heat generation When the heating element is heated in a normal atmosphere and the temperature of the heating element falls below 37 ° C, it is assumed that the use has ended, and the heat generation after the end of heat generation Open the end of the section heat generating part of the body, take out the heat generating composition, and heat the heating element in a direction passing through the section heat generating area that is the non-sealing area of the remaining storage body and the section that is the sealing area almost orthogonally A section of the container cut out in the longitudinal direction of the region including the seal portion at the periphery of the sample is used as a sample.
3) Sample of the section of the heating element before heat generation A section cut in the longitudinal direction of the region including the seal portion around the heating element along the section of the heating element before heat generation is used as a sample. It may be a section of the storage body of the heating element before heat generation.
4) Sample of the section of the heating element after the end of heat generation A sample cut in the longitudinal direction of the region including the seal part at the periphery of the heating element along the section of the heating element after the end of heat generation is used as a sample . It may be a section of the storage body of the heating element after the end of heat generation.

In measuring the loop stiffness of the sample,
1) Marking may be performed with a magic pen, a felt pen, or the like on a loop forming portion having a loop length of 50 mm.
2) When the fixing means such as an adhesive layer is provided, the fixing means is set inside, the separator is removed, and the loop stiffness is measured.
3) When the length of the sample is short, it may be measured by adding a fixing film or the like to the sample. For example, measurement may be performed by adding a fixing film or the like to a sample having a loop length of 50 mm.
4) If the heating element or storage body has local ventilation material, texture material, temperature buffer material, etc., remove them and cut out the sample. However, when they are fixed to the heat body or the storage body and the heating element or the storage body breaks when they are removed, samples are prepared by removing them as much as possible. This also applies to samples for measuring maximum tensile strength and elongation at break.

  The apparatus for measuring the loop stiffness is not limited as long as the loop stiffness can be measured, but examples include a loop stiffness tester manufactured by Toyo Seiki Co., Ltd., a loop stiffness tester manufactured by Tester Sangyo Co., Ltd., and the like.

When the sample for measuring the maximum tensile strength and breaking elongation of the heating element or storage section is cut out from the heating element or storage section, the breaking elongation of the section is extended along the longitudinal direction of the section. The value of elongation at break is used.
The width and length of the sample for measuring the maximum tensile strength and breaking elongation of the section are not limited as long as the maximum tensile strength and breaking elongation can be measured. A sample may be prepared and measured according to the size of the section. The width is preferably 20 mm or less and the length is preferably 200 mm or less.

The tensile test of the present invention is performed according to JIS L1096. For example, the packaging material is cut into a width of 8 mm and a length of 80 mm, and the end of the sample is subjected to a tensile force sufficient to remove all looseness without applying a load to the load cell. Adjust and install on the device. Next, after the sample temperature is stabilized at a desired test temperature (for example, 25 ° C., 80 ° C., etc.), the apparatus is operated, and the crosshead speed is 50 to 400 mm / min, preferably 300 mm / min. Stretch and record on chart.
The measurement sample is preferably 3 to 20 mm in width and 30 to 200 mm in length, and the distance between chucks is preferably 10 to 100 mm.
1) Maximum tensile strength (g / mm)
The maximum value of the tensile strength of the sample is read from the chart and divided by the sample width to obtain a value converted into mm units as the maximum tensile strength.
2) Elongation at break
The elongation at the time when the sample breaks is read from the chart and defined as the elongation at break.
That is,
Q (%) = 100 × (NB−NS) / NS
Q: Elongation at break
NB: Length of sample at break (distance between chucks at break)
NS: Length of sample at installation (distance between chucks at installation)
In addition, when the width of the sample is narrow, it may be fixed on a mount or the like and tested.

  In the present invention, the elongation load and the elongation at break of the packaging material constituting the surface of the packaging material such as the base material and the coating material and the storage body are at least in one direction such as the packaging material, regardless of the vertical or horizontal direction. What is necessary is just to have the elongation load or breaking elongation, and the direction is not ask | required.

The rising temperature rising rate measuring method of the present invention uses an exothermic composition or an exothermic composition molded body, is airless, has an ambient temperature of 23 to 30 ° C., and preferably 23 ° C. Measure in a state where it can come into contact with When the exothermic composition or the exothermic composition molded body has heat, the measurement is preferably performed after the exothermic composition or exothermic composition molded body is brought to the ambient temperature. The exothermic temperature is measured using a data collector, and the temperature at the start of the test (Ts) and the temperature 5 minutes after the start of the test (Te) are measured at a measurement timing of 2 seconds. A thermometer can also be used.
1. In the case of the exothermic composition 1) A magnet so as to cover the shape of the punched hole in the mold near the center of the back surface of a plastic support plate (thickness 5 mm × length 600 mm × width 600 mm) such as vinyl chloride on the support base with legs. Is provided.
2) Place the bulb of the temperature sensor or thermometer on the center of the support plate.
3) A support plate with an adhesive layer interposed so that the center of a polyethylene film with a thickness of 25 μm × length 250 mm × width 200 mm is about 80 μm thick and the center of the polyethylene film of the sensor or thermometer Paste to.
4) On the center of the polyethylene film, place a template plate of length 250mm x width 200mm with a punch hole of length 80mm x width 50mm x height 4mm, place a sample near the punch hole, Move along the template surface to fill the sample with the sample. Next, temperature measurement is started except for the magnet under the support plate.
2. In the case of the exothermic composition molded body, 1) to 3) are the same as in the case of the exothermic composition.
4) The exothermic composition molded body is placed on the center of the polyethylene film, and temperature measurement is started. When the exothermic composition molded body is easily broken, it is broken and measured in the same manner as the exothermic composition. The exothermic composition to be measured is sealed in a non-breathable bag such as an outer bag and placed in an environment of 23 to 30 ° C., preferably 23 ° C., after the exothermic composition is in the environment. It is preferable to measure.
3. Rise temperature rise rate The rise temperature rise rate is the difference (Te−Ts) between the temperature (Ts) at the start of heat generation and the temperature (Te) 5 minutes after the start of the test.

The heat generation performance test of the present invention uses a heating element, and is measured in a state where the sample can be in contact with air at the time of measurement under the condition of no wind and ambient temperature of 23 to 30 ° C., preferably 23 ° C. It is preferable to make the measurement after bringing the heating element to ambient temperature. The exothermic temperature is measured by using a data collector or a thermometer to measure the exothermic characteristics.
1) Lay four towel cloths on a plastic support plate (thickness 5 mm × length 600 mm × width 600 mm) such as vinyl chloride on a support base with legs.
2) Place the temperature sensor or thermometer bulb on the center of the towel cloth.
3) Place the non-ventilated surface of the heating element toward the temperature sensor or thermometer sphere, and place the center of the heating element at the temperature sensor or thermometer sphere.
4) Overlay four towel cloths on it.
5) Start temperature measurement.

The bending resistance of the present invention indicates rigidity (harness, stiffness) or flexibility, and conforms to the JIS L 1096A method (45 ° cantilever method) except that the heating element itself is used as a sample. Is. That is, one side of the heating element is placed on the scale base line on a smooth horizontal base having a slope of 45 ° (degrees) at one end. Next, the heating element is slid gently in the direction of the slope by an appropriate method, and when the central point of one end of the heating element contacts the slope, the position of the other end is read on the scale. The bending resistance is indicated by the length (mm) that the heating element has moved. Each of the five heating elements is measured and an average value is obtained. However, it is assumed that the heating unit containing the heat generating composition of the heating element has a moving direction distance of 5 mm or more and a distance in the direction orthogonal to the moving direction of 20 mm or more on the horizontal table. In addition, the length of the heating element placed on the horizontal table is such that the area crossing the area where the exothermic composition is present or the area where the exothermic composition is present is not linear. It is assumed that you are crossing.
1) Measurement calculation method of bending resistance of heating element having pressure-sensitive adhesive layer (1) The surface of the heating element that does not have the pressure-sensitive adhesive layer is placed on a horizontal table and measured.
(2) If the side of the heating element that has the adhesive layer faces the side of the horizontal base and the adhesive layer cannot be measured on the horizontal base, attach a cover to the adhesive layer and place the surface of the adhesive layer side with the cover on the water. Measure on a flat table.
(3) The cover covering the pressure-sensitive adhesive layer of the heating element with the pressure-sensitive adhesive layer has a bending resistance of 30 mm or less, preferably 20 mm or less, more preferably 10 mm or less, still more preferably 5 mm or less, and / or Or a thickness of 50 μm or less, preferably 25 μm or less, more preferably 1 μm to 25 μm, still more preferably 1 μm to 15 μm, still more preferably 1 μm to 10 μm, or a plastic film that can be wrinkled and wrinkled lightly Use a soft film with no waist. Examples include wrap films such as polyethylene films, vinylidene chloride films, vinyl chloride films, and roll-shaped plastic bags.
2) Measurement and calculation method of minimum bending resistance For one heating element, place one side on a horizontal table and measure bending resistance in each direction. Next, the other surface is placed on a horizontal table and measured in the same manner to obtain each bending resistance. The smallest bending resistance of each value is defined as the minimum bending resistance.
3) As for the bending resistance of the packaging material such as the base material and the covering material, a short 100 mm × longitudinal 200 mm test piece is prepared, and the bending resistance in the longitudinal direction (200 mm direction) is adopted. When a test piece of the above size cannot be prepared from the packaging material, a test piece having a size close to the test piece is prepared and measured as much as possible.

The minimum bending resistance difference of the present invention is the difference between the minimum bending resistance before heat generation and the bending resistance after heat generation in the direction of minimum bending resistance before heat generation.
That is,
Minimum bending resistance difference = (Minimum bending resistance before heat generation)-(Minimum bending resistance before heat generation)
Bending after heat generation)
It is.
The bending resistance in the direction of the minimum bending resistance after the end of heat generation is assumed to be the end of use when the obtained heating element is heated in a normal atmosphere and the temperature of the heating element is below 37 ° C. This is the bending resistance of the heating element after the end of heating in the same direction as the minimum bending resistance before heating.

The change in the minimum bending resistance is a value indicating the ratio of the minimum bending resistance after the end of heat generation to the heating element or the heating portion before the heat generation. The minimum bending resistance change is calculated by the following equation.

Minimum bending resistance change (%) = ((B−A) / A) × 100
A: Minimum bending resistance (mm) of the heating element before heat generation
B: The minimum bending resistance (mm) of the heating element after completion of heat generation
1) Ignore heat generation during measurement and measure immediately.
2) The obtained heating element is left in air in a 20 ° C. environment without wind to generate heat. When the heating is finished and the temperature of the heating element becomes equal to the environmental temperature, the heating is finished. Then, the bending resistance of the heating element in the direction showing the minimum bending resistance of the heating element before the heating is measured to obtain the minimum bending resistance of the heating element after the end of heating.
Or, it is attached to the body or clothes to generate heat, and after the end of heat generation, measure the bending resistance of the heating element in the direction indicating the minimum bending resistance of the heating element before heat generation, and generate heat after the end of heat generation. Let it be the minimum bending resistance of the body.
3) The measurement direction of the minimum bending resistance of the heating element before heat generation and the measurement direction of the minimum bending resistance of the heating element after completion of heat generation are the same measurement direction.
4) When the minimum bending resistance (A) of the heating element before the heat generation cannot be measured and the minimum bending resistance (B) after the heating is completed can be measured, the minimum stiffness (B) of the heating element after the heating is completed is determined. The longest length of the heating element in the same direction as the direction in which it is present is defined as the minimum bending resistance (A).

The minimum bending resistance is the bending resistance with respect to the minimum bending resistance of the heating element or the heating portion and the total length in the direction, and is calculated by the following equation.
Minimum flexural modulus (%) = (A / L) × 100
A: Minimum bending resistance of heating element or heating part
L: Total length of the heating element or heating part in the direction showing the minimum bending resistance

The maximum bending resistance ratio is a ratio between a direction having the minimum bending resistance of the heating element and a bending resistance in a direction perpendicular to the minimum bending resistance of the heating element. This is an index indicating handleability, and the larger the value, the better the handleability. That is, if it has a structure that is easy to bend in one direction and is difficult to bend in a direction perpendicular to it, directionality occurs in the bending, and the direction that is difficult to bend becomes a column, and the heating element is easily attached to a human body or the like. The maximum bending resistance ratio indicates the ease of handling of the heating element, and the larger the value, the easier the handling.
Maximum stiffness ratio = (C / A)
A: Minimum bending resistance of heating element or heating part
C: Bending softness in a direction perpendicular to the direction having the minimum bending resistance of the heating element
However, if the maximum bending resistance is too large to be measured, the maximum length in that direction is the bending resistance (C).

  The measurement method is the same when obtaining arbitrary bending resistance and bending resistance change. In the description of each item of the minimum bending resistance, the minimum bending resistance change, and the minimum bending resistance ratio, "Can be removed. In the case of the bending resistance, the character “maximum” of the maximum bending resistance may be removed.

  The method for defining the surplus water value of the exothermic composition of the present invention was determined after 5 minutes after permeating from a cylindrical exothermic composition having a diameter of 29 mm and a height of 20 mm provided on JIS P3801 “Type 2” filter paper. The permeation distance of water or an aqueous solution is measured, and the permeation distance (mm) per unit height (mm) of the exothermic composition is defined as an excess water value.

As shown in FIGS. 14 to 18, the method for defining the surplus water value of the exothermic composition uses a surplus water value measuring device 54. This will be described with reference to FIG.
FIG. 14 is a plan view showing a filter paper provided with a reference line.
FIG. 15 is a cross-sectional view showing the measuring apparatus.
FIG. 16 is a cross-sectional view showing the operation.
FIG. 17 is a cross-sectional view showing the measurement.
FIG. 18 is a plan view showing a filter paper for calculating the excess water value.
Under the environment of 20 ° C., eight reference lines 41 were written at 45 ° intervals radially from the center point using the exothermic composition 53 which was a sample adjusted in the environment.
JIS P3801 “Type 2” filter paper 40 (FIG. 14) is placed on a support plate (stainless steel plate or the like) 47, and a length of 150 mm having a cylindrical through-hole 43 having a diameter of 29 mm and a height of 20 mm at the center of the filter paper 40. X A measuring plate 42 having a smooth surface of 100 mm in width is placed (FIG. 15), a heat generating composition (sample) 53 is placed in the vicinity of the cylindrical through-hole 43, and the filling plate 48 is moved along the measuring plate 42 (FIG. 15). 16) A non-water-absorbing plastic film (70 μm polyethylene film or the like) is filled so as to cover the cylindrical through-hole 43 so that the exothermic composition 53 is filled and the exothermic composition 53 does not cause an exothermic reaction during the measurement. 50, and further, a pressing plate (a stainless steel flat plate having a thickness of 5 mm × a length of 150 mm × a width of 150 mm) 49 is placed thereon (FIG. 17). After holding for 5 minutes, the filter paper 40 is taken out (FIG. 1). ) The water or aqueous solution penetration distance 52 is measured from the radial circle 46 of the cylindrical through hole having a diameter 44 of 29 mm to the penetration tip of the penetration mark 51 along the radial reference line 41. The distance was read in mm, and the value (mm) obtained by arithmetically averaging the eight permeation distances 52 (m1, m2, m3, m4, m5, m6, m7, m8) that were read was the height of the cylindrical through-hole ( mm), and then multiply by 100 to obtain a surplus water value. As the surplus water value of the sample, it is preferable to measure three points for the same sample, average the three surplus water values, and use the average value as the surplus water value of the sample. The surplus water value is the present surplus water value of the exothermic composition 53 and is a value that is not related to the total water content of the exothermic composition 53. Further, a diameter circle 46 (dotted circle in FIG. 14) of the cylindrical through hole may be described on the measurement filter paper 40 before the measurement. Line type does not matter.

  The filter paper that can be used in the method for determining the excess water value of the exothermic composition of the present invention is JIS P3801, “1 type”, “2 types”, “3 types”, “4 types”, “5 types A”, “5 types”. Examples of filter papers “B”, “5 types C”, and “6 types” are listed as examples, but there is no limitation as long as the filter paper has a drainage time of 120 seconds / 100 ml or less. JIS P3801 “Type 2” filter paper is preferred. A filter paper having a retained particle diameter of 4 to 6 μm and a drainage time of 70 to 90 seconds / 100 ml can also be used.

  The JIS P3801 “Type 2” filter paper is a filter paper No. manufactured by Toyo Filter Paper Co., Ltd. 2 and filter paper No. manufactured by Nakamura Science Co., Ltd. 2 and Whatman filter paper grade 2 are examples.

  The material of the surplus water measuring device such as the measuring plate is not limited as long as at least the portion that contacts the exothermic composition is non-water-absorbing, but a metal such as stainless steel, a synthetic resin such as a thermoplastic resin or a thermosetting resin Examples thereof include minerals such as stones and rocks.

  The surplus water value of the exothermic composition of this invention is a value which can measure the amount of surplus water in the present exothermic composition rapidly. Since the permeation distance of the excess water in the exothermic composition to the filter medium is proportional to the amount of excess water in the exothermic composition and the height or thickness of the exothermic composition, the excess water amount in the exothermic composition at the time of measurement is exothermic. It is the value shown as the surplus water value comprised from the ratio of the osmosis | permeation distance to the filter medium of the surplus water in a composition, and the height of a heat-generating composition.

  The method for defining the excess water value in the exothermic composition of the present invention is a value obtained by quantifying the amount of excess water in the exothermic composition from the height of the exothermic composition and the penetration distance of excess water in the exothermic composition into the filter paper, Regardless of the total amount of water in the exothermic composition, the amount of excess water in the exothermic composition at the time of measurement can be specified, the measurement operation is simple, easy, and can be measured quickly, and in the exothermic composition at the time of measurement This is a method for calculating a new specified amount of surplus water that indicates the amount of surplus water.

  The exothermic composition of the invention having an excess water value defined by the method for defining the excess water value in the exothermic composition of the present invention can predict moldability and exothermicity, and is useful for designing exothermic compositions and heating elements. In addition, even after manufacturing the heating element, by measuring the excess water value of the heating composition in the heating element, the deterioration state of the heating composition and the heating element due to moisture reduction, that is, the heating composition and heating element at that time The health of the heating element can be easily checked. The surplus water value is a practical value with high practicality.

  When the surplus water in the exothermic composition or the mixed composition becomes an appropriate amount, the hydrophilic group in the component of the composition is hydrated by dipolar interaction or hydrogen bond, and the vicinity of the hydrophobic group. It seems to exist with high structure. As a result, it is estimated that sandy sand is formed, and moldability of the exothermic composition occurs. In some sense, surplus water is a connected substance. In addition to this, there is also water in a state that can be called free water, and if excess water increases, the structure will soften and free water will increase. By using an appropriate amount of surplus water, each component particle is held together by the surface tension of moisture, causing the exothermic composition to form, and the moisture does not substantially function as an air barrier layer. It generates heat upon contact. It is the surplus water value of the present invention that determines an appropriate amount of surplus water.

  The surplus water value is a value obtained by quantifying surplus water, which is the amount of water that can be easily moved or exuded out of the water contained in the exothermic composition, reaction mixture, exothermic mixture, or the like. .

The surplus water value of the exothermic composition of the present invention is such that surplus water that is water or an aqueous solution that can move in the moisture of the exothermic composition is in the direction perpendicular to the height or thickness direction of the exothermic composition on the filter paper. It is determined by the amount of water or aqueous solution.
Since the water or aqueous solution to which the exothermic composition can move moves in the weight direction and there is filter paper, the exothermic composition moves along the filter paper in a direction perpendicular to the height or thickness direction of the exothermic composition. The surplus water value is shown as a value per unit height.

  Since the penetration of the excess water amount of the exothermic composition into the filter medium or the filter paper is greatly affected by the thickness or height of the exothermic composition, the excess water value of the exothermic composition in the exothermic body of the present invention is the thickness of the exothermic composition. Or a value incorporating the height is adopted.

  The surplus water value of the present invention is a more practical value because the surplus water value indicating the surplus water amount in the exothermic composition can be obtained regardless of the total amount of water in the exothermic composition.

The manufacturing method of the heating element of the present invention is as follows:
A container having a structure composed of a divided heat generating portion region and a divided portion region that is a connecting portion has an excess water value of 0.5, with iron powder, a carbon component, a reaction accelerator, and water as essential components in the divided heat generating portion region. The exothermic composition molded body obtained by molding the -80 excess water exothermic composition is accommodated, and a plurality of segmented heat generating portions are provided at intervals with a segmented portion that is a hinge as an interval. The portion has air permeability, and at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region and the divided portion of the container is 700 mN / cm or less, and is flexible based on the structural flexible function and the joint flexible function. An exothermic precursor having the property of being encased in an outer bag, which is a container composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day), in a natural environment not damaged, and , Holding temperature 1-80 ° C and holding humidity 95 % In a controlled environment selected from below control environment, and the retention period is 25 hours to 2 years, making iron powder, carbon component, reaction accelerator and water essential components, excess water A segmental heat generating part that contains a hydrous exothermic composition having a value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more and a segmented part that is a hinge are integrated, and a plurality of segmented heat generating parts are segmented. And at least a part of the heating element is air permeable, and at least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less A heating element manufacturing method for manufacturing a heating element having flexibility based on a structural flexible function and a joint flexible function,
A container having a structure composed of a divided heat generating portion region and a divided portion region that is a connecting portion has an excess water value of 0.5, with iron powder, a carbon component, a reaction accelerator, and water as essential components in the divided heat generating portion region. The exothermic composition molded body obtained by molding the -80 excess water exothermic composition is accommodated, and a plurality of segmented heat generating portions are provided at intervals with a segmented portion that is a hinge as an interval. The portion has air permeability, and at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region and the divided portion of the container is 700 mN / cm or less, and is flexible based on the structural flexible function and the joint flexible function. The exothermic precursor having the property is composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day) Encased in an outer bag that is a container and damaged In a natural environment and in a kind of environment selected from a controlled environment where the holding temperature is 1 to 80 ° C. and the holding humidity is 95% or less, and the holding period is 25 hours to 2 years, A segmental heat generating unit containing a water-containing heat generating composition having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 40 ° C./5 minutes or more; A partitioning portion that is a hinge is integrated, a plurality of partitioning heat generating portions are provided at intervals with the partitioning portion as an interval, and at least a part of the heating element has air permeability, and the partitioning heat generating region of the storage body And a heating element manufacturing method for manufacturing a heating element having a flexibility based on a structural flexible function and an articulated flexible function, wherein at least one loop stiffness in a longitudinal direction across the section is 700 mN / cm or less.
In addition, the method for producing a heating element of the present invention is not limited as long as a heating element having a hydrous heating composition having a surplus water value of 0 can be produced using a substantially flat packaging material. Is given as an example.
1) Combined packaging materials such as a covering material and a base material, and three-sided sealing to produce a plurality of storage bodies having a bag-like region corresponding to a divided heat generating portion and a partitioning portion which is a sealing portion. From the opening of the head region, put a water-containing exothermic composition with a surplus water value of 0 containing iron powder, carbon component, reaction accelerator and water as essential components manually or with a filling machine, etc. A method of manufacturing a heating element that seals a part.
2) A heating composition molded body obtained by molding a surplus water exothermic composition having a surplus water value of 0.5 to 80 on a substantially flat packaging material is laminated, and another packaging material is further coated thereon. An exothermic precursor produced by sealing the peripheral edge of the exothermic composition molded body, and iron powder in the divided heat generating portion region of the container having a structure composed of the divided heat generating portion region and the connecting portion, A heat generating composition molded body formed by molding a surplus water exothermic composition having a surplus water value of 0.5 to 80, containing carbon components, reaction accelerators, and water as essential components, is housed, and a plurality of divided heat generating portions are non- At least one part of the exothermic precursor is air permeable and has at least one longitudinal direction crossing the divided heat generating region and the divided portion of the storage body. Loop stiffness is 700 mN / cm or less, and at least The maximum tensile strength at 25 ° C. of the two sections is 20 g / mm width or more, the elongation at break at 25 ° C. is 5% or more, the minimum bending resistance of the exothermic precursor is 70 mm or less, and the structural flexibility function And an exothermic precursor having flexibility based on the joint flexible function is enclosed in an outer bag which is a storage body composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day), Hold under a kind of environment selected from a natural environment that is not damaged and a controlled environment with a holding temperature of 1 to 80 ° C. and a holding humidity of 95% or less, and the holding period is 25 hours to 2 years. By this, an iron powder, a carbon component, a reaction accelerator, water is an essential component, a surplus water value is 0, and a water-containing exothermic composition having a rising temperature rising rate of 12 ° C / 5 minutes or more is stored. The heating part and the non-storage area and the connecting part that is the connecting part A plurality of divided heat generating portions provided at intervals with the divided portions as an interval, and at least a part of the heat generating body is air permeable, and the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body At least one loop stiffness in the direction is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of at least one section is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more. A method for manufacturing a heating element having a flexibility based on a structural flexibility function and an articulation flexibility function, wherein the heating element has a minimum bending resistance of 70 mm or less and a difference in minimum bending resistance of 0 mm or less.
3) A heating composition molded body obtained by molding a surplus water exothermic composition having a surplus water value of 0.5 to 80 on a substantially flat packaging material is laminated, and another packaging material is further coated thereon. An exothermic precursor produced by sealing the peripheral edge of the exothermic composition molded body, and a storage body having a structure composed of a segmented heat generating region and a segmented portion region that is a connecting portion, iron in the segmented heat generating region. Powder, carbon component, reaction accelerator, water as essential components, surplus water value is 0.5 to 80, preferably 1 to 80, more preferably 2.5 to 80, still more preferably 5 to 80 The exothermic composition molded body obtained by molding the surplus water exothermic composition is accommodated, and a plurality of divided heat generating portions are provided at intervals, with the divided portions being non-contained regions as intervals, and at least a part of the exothermic precursor Is breathable, and the longitudinal direction across the section heat generating area and the section of the container At least one loop stiffness is 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, and the elongation at break at 25 ° C. is 5% or more, The exothermic precursor having the minimum bending resistance of the exothermic precursor of 70 mm or less and having the flexibility based on the structural flexible function and the joint flexible function is 0.1 to 6.0 g / (m ² · day). ) And sealed in an outer bag, which is a container made of a packaging material having an oxygen permeability of 0.05 to 10 ml / (m ² · day), and is kept in a natural environment that is not damaged and has a holding temperature. By holding it in a kind of environment selected from 1 to 80 ° C. and a control humidity of 95% or less, and holding the holding period for 25 hours to 2 years, iron powder, carbon component, reaction accelerator, Water is an essential ingredient, The divided heat generating part for storing the water-containing exothermic composition whose surplus water value is 0 and the rising temperature rising rate is 12 ° C./5 minutes or more and the dividing part which is a non-storage area and a connecting part are integrated, A plurality of divided heat generating portions are provided at intervals with the divided portions as an interval, and at least a part of the heat generating body has air permeability, and at least one of the heat generating regions in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body. The loop stiffness is 700 mN / cm or less, the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more, the breaking elongation at 25 ° C. is 5% or more, and the heating element The minimum bending resistance is 70 mm or less, the minimum bending resistance difference is 0 mm or less, and / or the minimum bending resistance change is −95 to 0, and is based on the structural flexible function and the joint flexible function Have flexibility A method for manufacturing a heating element.
Here, the seal is not limited as long as it can be sealed, but heat seal, adhesive (pressure-sensitive) seal, adhesive seal, and the like can be given as examples. Heat sealing is particularly preferable.

In the method for converting the surplus water-containing exothermic composition of the present invention, the surplus water value is 0.5 to 80, preferably 1 to 80, and more preferably, without changing the shape and size of the heating element and the heating part. Is a method of converting a moldable excess water exothermic composition having a exothermic property of 2.5 to 80, more preferably 5 to 80 into a hydrous exothermic composition having an excess water value of 0 and good exothermic characteristics. . After the excess moisture is removed, it may be stored in an outer bag as it is until it is used, or it may be replaced with a new outer bag and stored.
Further, by the oxygen mixed at the time of manufacture or a small amount of oxygen entering from the bag, the mild oxidation proceeds on the iron surface, and at least part of the iron component in the exothermic composition is made at least part of the surface. It is also a method of manufacturing a heating element that converts to an iron component having an iron oxide. An iron component having an iron oxide on at least a part of the surface has good heat buildup.

The above-mentioned “under a natural environment that is not damaged” means a place where the exothermic precursor and the exothermic body are held without being damaged, and there is no limitation if the annual average temperature is 5 ° C. or higher. The maximum temperature is 5 ° C. or higher, preferably 10 ° C. or higher, and it is preferable that the natural temperature does not damage the exothermic precursor. The annual average temperature is 5 ° C or higher, preferably 6 ° C or higher, more preferably 7 ° C or higher, still more preferably 10 ° C or higher, further preferably 15 ° C or higher, and further preferably 20 ° C. It is above ℃.
The “holding place” is not limited as long as it is a place where there is no damage to the heat generation precursor and the heat generation body due to external pressure or the like, but a room, a general warehouse, a stock point, a shipping warehouse, an air conditioning warehouse, a temperature-controlled room, Examples include drying chambers, dehumidifying drying chambers, or the inside of transportation means such as containers, trains, trucks, automobiles, ships, and airplanes. Includes during transportation of transportation means. A place where a hygroscopic agent such as silica gel or hot air is used is also effective. A method of putting the exothermic precursor sealed in an outer bag into a cardboard box and storing it in a warehouse or a method of natural preservation is also included. In addition, a plurality of heat-generating precursors enclosed in an outer bag are packed in boxes or pillows, packed in cardboard boxes, and stored, stored and stored in warehouses such as retail stores, supermarkets, drug stores, mass retailers, and drug stores. Or the case where it is exhibited.
For example, several heat-generating precursors manufactured in Japan and sealed in a non-breathable outer bag are packed in a box, and then packed in a cardboard box and held in a shipping warehouse, and then sold in large quantities in domestic supermarkets, etc. Exothermic precursor containing surplus water exothermic composition that is transported to a store by truck, etc., stored in the warehouse of the mass merchandising store, and arranged in the store for 25 hours to 2 years after manufacture of the exothermic body Is converted to a heating element containing a water-containing heating composition with an excess water value of 0 or less and less than 0.5, preferably 0. It is also an effective means to hold it at a stock point after production. The holding place is not limited to within Japan, and may be outside Japan. The manufacturing place, the shipping destination, and the store where the general user purchases are not limited to within Japan, and can be applied both within and outside Japan. It is also an effective place during transportation overseas by means of transportation. In a natural environment, the holding time is preferably from 25:00 to 2 years, but may be held for a long time exceeding 2 years.

The temperature under the control environment of the present invention is preferably 1 to 90 ° C, more preferably 1 to 80 ° C, still more preferably 1 to 70 ° C, still more preferably 1 to 60 ° C, More preferably, it is 5-60 degreeC, More preferably, it is 5-50 degreeC, More preferably, it is 10-50 degreeC, More preferably, it is 10-40 degreeC, More preferably, it is 20-40 degreeC.
The humidity under the control environment of the present invention is preferably 99% or less, more preferably 95% or less, still more preferably 90% or less, still more preferably 1 to 90%, and still more preferably. 1 to 80%, more preferably 1 to 70%, still more preferably 10 to 70%, still more preferably 10 to 60%, still more preferably 10 to 50%, and still more preferably 10 It is -45%, More preferably, it is 10-40%, More preferably, it is 10-30%. Lower humidity is preferred.
What is necessary is just to select suitably the temperature and humidity in the control environment of this invention.

The “holding period held in the environment” is a period in which the time held in the environment is accumulated continuously or intermittently. Periods placed in environments other than the prescribed environment are not accumulated.
The retained retention period is 25 hours to 2 years, preferably 25 hours to 1.5 years, more preferably 3 days to 1.5 years, and even more preferably 3 days to 1 year. Further, it is preferably 7 days to 1 year, more preferably 30 days to 1 year, further preferably 30 days to 0.75 year, and further preferably 30 days to 0.5 year.

The packaging material of the outer bag, which is a non-breathable container that contains the exothermic precursor, is preferably moisture permeable by a rissy method under conditions of atmospheric pressure, temperature 40 ° C., humidity 90% RH, preferably 0.1 to 6.0 g / (m ² · day), more preferably 0.1 to 5.0 g / (m ² · day), and more preferably 0.1 to 4.0 g / (m). ² · day), more preferably 0.2 to 4.0 g / (m ² · day), more preferably 0.3 to 4.0 g / (m ² · day), and still more preferably 0.4 to 4.0 g / (m ² · day), more preferably 0.5 to 4.0 g / (m ² · day), and further preferably 0.5 to 3.8 g / (m a ² · day), still more preferably ^{0.5~3.5g / (m 2 · day)} , more preferably 0.5 3.0 g ^/ a (m 2 · day), still preferably ^{0.5~2.0g / (m 2 · day)} , more preferably 0.5~1.9g / ^(m 2 · day) , still preferably ^{0.5~1.8999g / (m 2 · day)} , still more preferably ^{0.5~1.85g / (m 2 · day)} , more preferably 0.5 1.5 g ^/ a (m 2 · day), still preferably ^{0.5~1.4999g / (m 2 · day)} , more preferably 0.5~1.45g ^/ (m 2 · day) It is.
The oxygen permeability is 10 ml / (m ² · day) exceeding 0 as measured by a measuring machine manufactured by Mocon US under the conditions of atmospheric pressure, temperature 23 ° C., and humidity 90%. Preferably it is 0.05-10 ml / (m < ² > * day), More preferably, it is 0.05-8 ml / (m < ² > * day), More preferably, it is 0.05-7 ml / (m < ² > * day). More preferably 0.05 to 6 ml / (m ² · day), still more preferably 0.05 to 5 ml / (m ² · day), still more preferably 0.05 to 4 ml / (m a ² · day), still more preferably ^{0.05~3ml / (m 2 · day)} , still more preferably ^{0.05~2ml / (m 2 · day)} , more preferably 0.05 to 1ml / (m ² · day), more preferred It is 0.05 to 0.5 ml / (m ² · day), more preferably 0.1 to 0.5 ml / (m ² · day).
As the packaging material for the outer bag, a non-breathable packaging material including the moisture permeability can be appropriately selected and used.

  Examples of the packaging material of the outer bag of the present invention include polyethylene, polypropylene, polyester, polyvinyl alcohol, ethylene vinyl alcohol copolymer, saponified ethylene-vinyl acetate copolymer, nylon, polyvinylidene chloride and other films, sheets, aluminum, etc. Vapor deposited film on which metal oxide such as silicon oxide or aluminum oxide is deposited, metal foil laminate film such as aluminum, biaxially stretched polyvinyl alcohol film and polyvinylidene chloride coated film, or a laminated film of two or more of these A film having a sealant film bonded to a film having excellent airtightness such as a film provided with a heat seal material, a film in which a sealant film is further bonded to a bonded film between the films having excellent airtightness, A composite film in which a film having excellent tightness and a polyethylene film, a propylene film, a polyester film, a polyvinyl alcohol film, a nylon film, or a biaxially stretched film thereof are bonded to each other, and a sealant film further bonded or heat seal An example is provided with a material. In particular, a film or sheet having an oxygen and / or water vapor barrier layer is useful. As a material for forming the barrier layer, polyvinyl alcohol, ethylene vinyl alcohol copolymer, saponified ethylene-vinyl acetate copolymer, metal oxide such as polyvinylidene chloride, silicon oxide, aluminum oxide, silicon nitride, aluminum nitride, etc. Examples thereof include metal nitrides such as metal oxynitrides such as silicon oxynitride and aluminum oxynitride, and metal foils such as aluminum foil.

  Here, the sealant film is a resin film having a relatively low melting point, and is used for thermally fusing these films bonded to a film having a relatively high melting point. As the sealant film, heat fusion of low density polyethylene film, medium density ethylene film, high density polyethylene film, propylene-ethylene copolymer film, ionomer film, ethylene-acrylic acid film, ethylene-methacrylic acid film, ethylene-vinyl acetate film, etc. An example is a film deposited. The outer bag of the present invention is formed by heat-sealing these two packaging materials into a bag shape and sealing the inner bag to form an outer bag. The thickness of the outer bag is not limited, but is usually about 20 to 200 μm, preferably 30 to 100 μm.

  The notch provided in the seal portion of the outer bag can be provided in any number and in any position except for the inside of the seal portion on the side where the heat generating body is housed. Examples include notches that are in contact with the outside of the seal portion and notches that are not in contact with either the inside or the outside of the seal portion. The notch (V notch, U notch, I notch, etc.) allows the user to easily tear and open the outer bag.

  For the outer bag, a so-called easy peel film may be used that, when sealed, is in a soft-adhesive state where the sealed portion can be easily peeled off. As the packaging sheet made of the easy peel film, a known material such as a non-breathable synthetic resin film coated with a styrene resin having an easy peel property can be appropriately used.

The exothermic precursor of the present invention contains an exothermic composition molded body obtained by molding an excess water exothermic composition having an excess water value of 0.5 to 80 or an excess water exothermic composition, and at least part of the exothermic precursor is breathable. Have. The entire surface may be air permeable or partially air permeable.
In the present invention, excluding surplus water value, moldability and exothermic property, exothermic precursors in other matters such as exothermic compositions, packaging materials (base materials, covering materials, local ventilation materials, etc.), sizes, shapes, etc. Follow the description of the heating element.

The exothermic composition compact also includes a exothermic composition compact that is a compressed exothermic composition compact. The method for producing an exothermic precursor of the present invention is not limited as long as it is a method for producing an exothermic precursor having an excess water exothermic composition. A moldable exothermic composition is molded into a desired shape by a casting molding method using a casting mold, the molded body is laminated on a base material, covered with a covering material, and the peripheral portion of the exothermic composition molded body is sealed. A manufacturing method is mentioned as an example.
In this case, a magnet may be used. It can be used for storing exothermic compositions in bags and molds by combining smooth filling blades and magnets, and for releasing molds from molds using magnets. Molding of exothermic composition molded bodies and production of exothermic precursors Becomes easier.

  The surplus water exothermic composition of the present invention is not limited as long as it contains an iron powder, a carbon component, a reaction accelerator and water as essential components, and the surplus water exothermic composition has an excess water value of 0.5 to 80. Except for the excess water value, the description items such as the components and blending ratio of the water-containing exothermic composition can be applied. This blending ratio can also be applied to a reaction mixture and an exothermic mixture used for improving exothermic performance by a partial oxidation reaction. The excess water value of the reaction mixture is preferably less than l.

  The surplus water exothermic composition of the present invention comprises an iron component, a carbon component, a reaction accelerator and water as essential components, and the surplus water value is 0.5 to 80, preferably 1 to 80, more preferably. Is 2.5 to 80, more preferably 5 to 80, still more preferably 5 to 70, still more preferably 5 to 65, still more preferably 5 to 60, and still more preferably 10 to 10. It is 60, More preferably, it is 10-55, More preferably, it is 10-50, More preferably, it is 10-40, More preferably, it is 10-35, More preferably, it is 10-30.

  The exothermic composition molded body obtained by molding the excess water exothermic composition also includes a compressed exothermic composition compressed body.

  The surplus water-containing exothermic composition includes an exothermic composition subjected to oxidation treatment, an activated iron powder having binding oxygen such as iron oxide, or an active iron powder having a carbon component on at least a part of the surface. An exothermic composition can also be used.

When the exothermic composition molded body is produced by a mold forming method such as the die-through molding method or the cast molding method, the surplus water value of the exothermic composition is 0.5-80.
The exothermic composition in the mold was dehydrated, laminated on the packaging material, covered with a coating material, and the periphery of the exothermic composition molded body was used with a pressure-sensitive (crimp) seal or heat seal layer using an adhesive. It may be sealed with heat sealing or the like to produce an exothermic precursor.
In addition, the molded exothermic composition molded body is laminated on a water-absorbent packaging material, covered with a covering material, and the periphery of the exothermic composition molded body is used with a pressure-sensitive (pressure-bonding) seal or heat seal layer. The heat-generating precursor may be manufactured by sealing with a heat seal or the like.
Further, the molded exothermic composition molded body is laminated on the nonwoven fabric, and further covered with the nonwoven fabric, pressed with a press roll, dried with hot air (nitrogen or air, etc.) at 30 to 200 ° C., cut, and then based on the sheet. You may manufacture by laminating | stacking on a material, covering with a coating | covering material, and sealing the peripheral part of a heat-generating composition molded object.

  The mold-through molding method uses a punching die, molds a moldable excess water exothermic composition, laminates a punching exothermic composition molded body on a substrate, and forms a exothermic composition molded body. It is a manufacturing method. The punching die is a die having a through hole having a desired shape and thickness. A drum-shaped forming device in which the through hole is provided on the rotating surface of a hollow drum-shaped rotating body, a chain conveyor-shaped forming device using a chain conveyor-shaped rotating body in which a plurality of sheet-shaped molds having the through hole are provided, and the like Is given as an example. As a continuous manufacturing method, a rotary punching die is used, and a molding machine for laminating a die-shaped exothermic composition molded body on a long base material and covering it with a long covering material, Using the rotary sealer that can seal the peripheral part of the part to be separated and the base material and the covering material (heat seal, pressure seal, thermocompression seal, etc.), the peripheral part of the exothermic composition molded body through the sealer As an example, a continuous forming method in which a necessary portion of the divided portion is heat sealed and sealed.

  The casting molding method is a method for producing a heating composition molded body by filling a moldable excess water heating composition into a casting mold having a recess and laminating the molded heating composition molding on a substrate. is there. The punching die is a die having a recess having a desired shape and thickness. Examples include a heat generating composition molded body manufacturing apparatus in which a concave portion is provided on the outer surface of a drum-shaped rotating body or a hollow drum-shaped rotating body. As a continuous production method, a molding machine for laminating a heat generating composition molded body on a long base material and covering it with a long covering material by filling the concave portion with a drum-shaped rotating body and transferring it to the base material , Using a rotary sealer that can seal the target section and the periphery of the base material and coating material (heat seal, pressure seal, thermocompression seal, etc.), and the exothermic composition through the seal An example is a continuous forming method in which necessary portions of the peripheral portion and the divided portion of the molded body are heat sealed and sealed.

The exothermic composition or exothermic composition molded body of the present invention may be compressed.
Compression is not limited, but in-mold compression and out-of-mold compression are examples.

  The in-mold compression is to compress the exothermic composition in the mold with a flexible rubber roll or a compression mold similar to the accommodating section while the exothermic composition is present in the mold accommodating section. As the compression ratio, the thickness of the compression body (the exothermic composition compression body) is preferably 50 to 99.5% of the mold thickness, more preferably 50 to 95%, still more preferably 55 to 95%. Yes, more preferably 60 to 95%, still more preferably 70 to 90%. The pressure at the time of pressurization is not limited as long as the moldable exothermic composition can be compressed to a predetermined thickness. The compression means used for compression molding is not limited, but examples include a flat plate and roll having elasticity such as rubber, and a flat plate and roll having a pushing portion that can be inserted into a mold cavity.

  The out-of-mold compression is to compress the exothermic composition molded body with a roll or the like after the exothermic composition is separated from the mold and becomes a exothermic composition molded body. This is usually performed after the exothermic composition molded body is covered with a covering material and / or a covering material, but it may not be covered. There is no restriction on the pressure during pressurization. There is no restriction on the compression rate.

  The out-of-mold compression is to compress the exothermic composition molded body with a roll or the like after the exothermic composition is separated from the mold and becomes a exothermic composition molded body. This is usually performed after the exothermic composition molded body is covered with a covering material and / or a covering material, but it may not be covered. There is no restriction on the pressure during pressurization. There is no restriction on the compression rate.

The mold formability is a function capable of maintaining the shape of the through hole even after the mold is accommodated in the mold having the through hole and the mold is removed. 22 and 23 are cross-sectional views for explaining moldability.
22 (a) to 22 (d) are cross-sectional views illustrating moldability.
Explains the moldability of the exothermic composition 53 having moldability. Measurement is performed using a mold formability measuring device 58. The measurement plate 42 is placed on the non-water-absorbing plastic film 50 provided on the support plate 47, and then the exothermic composition 53 is placed on the measurement plate 42. Even if the measuring plate 42 is removed after the cylindrical through-hole 43 of 42 is filled and the magnet 59 is removed, the exothermic composition 53 having the moldability has a moldability. The shape of the through hole 43 is maintained.
FIGS. 23A to 23D are cross-sectional views illustrating non-moldability.
The non-molding property of the exothermic composition 53 having no moldability is described. Although the same operation as in FIG. 22 is performed, the non-moldable exothermic composition 53 does not have moldability, and thus the shape of the cylindrical through hole 43 cannot be maintained after the measurement plate 42 is removed. It has collapsed in all directions.

As described above, the heating element of this embodiment is thin and excellent in flexibility, and has a good touch during use.
The present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the present invention.
The form of the heating element of the present invention can be appropriately changed according to the application. For example,
When the heating tool is used by being wrapped around the body or an object, it can be formed in a belt shape. Moreover, when using it on the surface of a body or a target object, it can also be set as a form like a cloth.
In the embodiment, the surface material may be laminated, or the surface material may be omitted.
In the said embodiment, heat sealing may be sufficient as joining of a coating | covering material and a base material, and these sealing and joining methods can also employ | adopt another method, for example, the method using an adhesive agent.

The use of the heating element of the present invention is not particularly limited, but since various shapes, thicknesses, and temperature zones can be obtained, outside of normal body warming, for warmth, for footwear and other footwear, for joints,
For face, for eyes, for thermal compresses, for drug body warmers, for neck, for waist, for masks, for gloves, for heels, for shoulders, for abdomen, for transpiration insecticide, for oxygen absorption, for cancer treatment, washing, As a hot seat combined with various functional agents such as sterilization, sustained wax release, fragrance, deodorization, etc., for flooring, folding, around the range, for house care such as a ventilation fan, for air care to make the space comfortable, for washing cars, etc. For car care such as waxing, for face and body washing, sterilization, moisturizing, makeup removal, etc. for skin care, bedding such as futon, blanket or their covers, cushions, rugs such as leisure sheets, etc. Can be used.

EXAMPLES Next, although an Example demonstrates this invention concretely, this invention is not limited by these.
Further, the fact that the minimum bending resistance is not measurable indicates that the heating element does not bend due to gravity. Normally, when the heating element protrudes horizontally, it keeps extending linearly in the horizontal direction or maintains a similar state.
In addition, t represents a duration (36 ° C. to the time for maintaining the maximum temperature), Tm represents the maximum temperature, and Ave represents an average value of temperatures of 36 ° C. or higher.
Further, the moisture permeability and oxygen permeability of the packaging material used for the outer bag are as follows: the atmospheric permeability, the temperature of 40 ° C., and the humidity of 90% RH. % Oxygen permeability measured by a measuring machine manufactured by Mocon, USA. The unit of moisture permeability is g / (m ² · day), and the unit of oxygen permeability is ml / (m ² · day).
OPP is a biaxially oriented polypropylene film, PVDC is a polyvinylidene chloride film, LDPE is a low density polyethylene film, LLDPE is a linear low density polyethylene film, EVA is an ethylene-vinyl acetate copolymer film, and PET is an abbreviation for polyethylene terephthalate film. It is.

Example 1
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare an excess water exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 44, and the rising temperature rising rate was 6 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a nylon non-woven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer on one side and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 2.0 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. The heat generating part has a heat generating part of 77 mm long × 12 mm wide and a heat generating part of 77 mm long × 10 mm wide, the seal width of the peripheral part is 8 mm, and the heat generating precursor is 138 mm long × 93 mm wide. Created multiple bodies.

Two outer packaging materials of 165 mm × 125 mm in size are superposed so that the surfaces having heat-fusibility are inside each other, the periphery is heat-fused and formed into a bag shape, and the exothermic precursor Was sealed, and a heat generation precursor sealed in a plurality of outer bags was produced. The outer bag packaging material has a structure of 15 μm OPP / 15 μm PVDC / 15 μmL DPE / 30 μm EVA (excluding anchor coat layers), moisture permeability is 2.7 g / (m ² · day), oxygen permeability is 2 .6 ml / (m ² · day).

  The exothermic precursor enclosed in the outer bag created as described above is placed in a thermostatic bath at a temperature of 50 ° C., and after holding for 30 days, the excess water value is 0, the rising temperature rising rate is 14 ° C./5 minutes A plurality of heating elements having the composition were obtained. The heating element has a peripheral seal width of 8 mm, a length of 138 mm × a width of 93 mm, a segmented heat generating portion of a length of 77 mm × width of 12 mm, a segmented portion of 77 mm length × width of 10 mm, The divided heat generating portions are provided at intervals with the divided portions as intervals. The loop stiffness of the heating element storage body was 98 mN / cm. The results of measurement of the heat generation performance and minimum bending resistance of the heating element are shown in Result 1. It is a hydrous exothermic composition that greatly increases the rate of temperature rise and warms immediately upon contact with air, and the heating element has excellent exothermic performance, loop stiffness, minimum stiffness, minimum stiffness It was recognized that it had excellent flexibility from the degree change.

Result 1
Performance of heating element Heat generation performance: t (hr) / Tm (° C) / Ave (° C)
: 7.2 / 41.2 / 38.6
Minimum bending resistance (mm): 42
Minimum bending resistance change: -28

(Example 2)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 20, and the rising temperature rising rate was 10 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a nylon non-woven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer on one side and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 2.0 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. The heat generating part has a heat generating part of 77 mm long × 12 mm wide and a heat generating part of 77 mm long × 10 mm wide, the seal width of the peripheral part is 8 mm, and the heat generating precursor is 138 mm long × 93 mm wide. Created multiple bodies.

Using two sheets of 165 mm × 125 mm outer bag packaging material, the surfaces having heat-fusibility are overlapped with each other, and the periphery is heat-fused to form a bag shape. The exothermic precursor was sealed to produce a plurality of outer bag-encapsulated exothermic precursors. The outer bag packaging material has a structure of 15 μm OPP / 200 μm silicon oxide vapor deposition film−12 μm PET / 15 μmL DPE / 30 μm EVA (excluding anchor coat layers), and has a moisture permeability of 1.9 g / (m ² · day), The oxygen transmission rate is 1.8 ml / (m ² · day).

The outer bag filled exothermic precursor prepared as described above is placed in a room without air conditioning, and after natural storage, after 120 days of retention, the surplus water value is 0 and the rising temperature rise rate is 14 ° C / 5 minutes. A plurality of heating elements having the composition were obtained. Six section heat generating portions are provided at intervals with a section portion that is a heat seal area as an interval, the section heat generation portion has a heat generation portion having a length of 77 mm × width of 12 mm, and the partition portion having a length of 77 mm × width of 10 mm. The peripheral seal width is 8 mm, and the length is 138 mm × width 93 mm. The loop stiffness of the heating element storage body was 150 mN / cm, the maximum tensile strength at 25 ° C. of the central section was 140 g / mm width, and the elongation at break at 25 ° C. was 80%. The loop stiffness of the section was 160 mN / cm. The maximum tensile strength at 25 ° C, elongation at break at 25 ° C, and loop stiffness of each section were 0.8 to 1.2 times the average value of the physical properties.
The results of measurement of the heat generation performance and minimum bending resistance of the heating element are shown in Result 2. It is a hydrous exothermic composition that greatly increases the rising temperature rising rate and warms immediately upon contact with air, and the heating element has excellent exothermic performance, from minimum bending resistance, minimum bending resistance change It was found to have excellent flexibility.

Result 2
Performance of heating element Heat generation performance: t (hr) / Tm (° C) / Ave (° C)
: 6.8 / 42.0 / 38.0
Minimum bending resistance (mm): 42
Minimum bending resistance change: -28

(Example 3)
A plurality of exothermic precursors were produced in the same manner as in Example 1 except that perforated perforations were provided at each section of the exothermic precursor, and sealed in an outer bag having a moisture permeability of 2.7. Next, the exothermic precursor was stored for 15 days in the same manner as in Example 1 to produce a plurality of exothermic bodies. The surplus water value of the hydrous exothermic composition of the heating element was 0. The minimum bending resistance before heat generation was 30 mm, the minimum bending resistance after completion of heat generation was 30 mm, and the change in minimum bending resistance was 0. It was found to have excellent flexibility. Further, the loop stiffness of the container after the heat generation was 150 mN / cm. In addition, the heating element was cut off from the perforation, divided into a plurality of small heating elements, and affixed to a desired place for use, which was very convenient.

Example 4
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 9 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a surplus water heating composition. The excess water value of the excess water exothermic composition was 10, and the rising temperature rising rate was 10 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a nylon non-woven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer on one side and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method. The bending resistance of the base material and the covering material was 53 to 58.
Using a 2.0 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. The heat generating part has a heat generating part of 77 mm long × 12 mm wide and a heat generating part of 77 mm long × 10 mm wide, the seal width of the peripheral part is 8 mm, and the heat generating precursor is 138 mm long × 93 mm wide. Created multiple bodies.

  Using two sheets of outer bag packaging material having a size of 230 mm × 125 mm, the surfaces having heat-fusibility are overlapped with each other, and the periphery is heat-fused to form a bag shape. The exothermic precursor was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

The outer bag-encapsulated exothermic precursor prepared as described above is held in a thermostatic bath at a temperature of 50 ° C. for 30 days, and a hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 49 ° C./5 minutes is obtained. A plurality of heating elements were obtained. The heating element is provided at intervals, with the six divided heat generating portions being the heat sealing region, and the divided heat generating portions are 77 mm long × 12 mm wide, and the divided portions are 77 mm long × 10 mm wide. The peripheral seal width is 8 mm, the length is 138 mm, and the width is 93 mm. The loop stiffness of the heating element storage body was 150 mN / cm, the maximum tensile strength at 25 ° C. of the central section was 140 g / mm width, and the elongation at break at 25 ° C. was 80%. The measurement result of the minimum bending resistance and the minimum bending resistance change of the heating element which is a bending / soft heating element is shown in Result 3.
As the outer bag packaging material, a packaging material having a moisture permeability of 2.7 g / (m ² · day) and an oxygen permeability of 2.6 ml / (m ² · day) was used.

(Comparative Example 1)
A storage body that is three-side sealed from the same base material and covering material as in Example 4 was produced, and the hydrous heat generating composition having a surplus water value of 0 taken out from the heating elements of the heating element group of Example 4 was stored in the outer bag. Then, the storage opening was heat-sealed to produce a single heating part heating element that is a commercially available cairo type. The minimum bending resistance and the minimum bending resistance change were measured. The test results are shown in Result 3.

Result 3

Heating element: Example 4: Comparative example 1
Rigid soft heating element Single heating element heating element
(Commercially available warmer type)

Exothermic part type: 6 divisional exothermic parts: 1 single exothermic part
Size (length x width): 138 mm x 93 mm: 138 mm x 93 mm
Heating element seal width: 8 mm: 8 mm
Heat generating part (length x width): 122 mm x 77 mm: 122 mm x 77 mm
Heating section width: 12mm:-
Division: 10 mm: −
Minimum bending resistance: 60mm: Cannot be measured without bending
(Before fever)
Minimum bending resistance: 48mm: Cannot be measured without bending
(After the end of fever)
Change in minimum bending resistance: −20: −
Minimum bending resistance: 43: −
Maximum bending resistance ratio: 1.6: −
Storage body: 30: −
Loop 150 140
Stiffness Flexibility: Yes: No

  As shown in Result 3, the bending resistance heating element of the present invention had a negative change in minimum bending resistance, and maintained at least flexibility and flexibility not only before heating but also after heating. Thereby, it can be seen how excellent the flexibility and flexibility of the heating element according to the present invention are.

(Example 5)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 9 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 10. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a nylon non-woven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer on one side and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 400 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 3.5 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering material so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and the interval between the six segment heat-generating parts as the heat-seal area The section heat generation part has a heat generation part with a length of 77 mm × width of 12 mm, the separation part has a length of 77 mm × width of 10 mm, the seal width of the peripheral part is 8 mm, and the heat generation of the section is 138 mm × width 93 mm A plurality of partial exothermic precursors were prepared.

A packaging material having a moisture permeability of 2.7 g / (m ² · day) was used as a packaging material for outer bags. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor prepared as described above is held in a thermostatic bath at a temperature of 50 ° C. for 90 days, and has a hydrous exothermic composition with an excess water value of 0 and a rising temperature rising rate of 49 ° C./5 minutes. A heating element was obtained. A plurality of segmented heating elements were obtained. The heating element is provided at intervals, with the six divided heat generating portions being the heat seal region, and the divided heat generating portions are 77 mm long × 12 mm wide, and the divided portions are 77 mm long × 10 mm wide. The peripheral seal width is 8 mm, and the length is 138 mm × width 93 mm. The loop stiffness of the heating element storage body was 150 mN / cm, the maximum tensile strength at 25 ° C. of the central section was 140 g / mm width, and the elongation at break at 25 ° C. was 80%. The minimum bending resistance of the heating element, which is a bending / soft heating element, was 30 mm, and the minimum bending resistance change was zero. At least flexibility and softness were maintained not only before the heat generation but also after the heat generation. Thereby, it can be seen how excellent the flexibility and flexibility of the heating element according to the present invention are.

(Example 6)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 9 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare a surplus water exothermic composition. The excess water value of the excess water exothermic composition was 25, and the rising temperature rising rate was 7 ° C./5 minutes or more. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The air permeability of the covering material was 450 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.5 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the excess water exothermic composition through a mold was laminated on the polyethylene film surface of the substrate, and polyethylene Covering the covering material so that the film surfaces are superposed on each other, heat-sealing the peripheral portion of the heat-generating composition molded body, cutting, and separating the six divided heat-generating parts as heat-seal areas as intervals, Provided at intervals,
The segmented heat generating part has a length of 77 mm × width of 15 mm, the segmented part has a length of 77 mm × width of 5 mm, the peripheral seal width is 8 mm, the thickness of 1 mm × length of 131 mm × width of 93 mm, Several were produced.

A packaging material having a moisture permeability of 2.7 g / (m ² · day) was used as a packaging material for an outer bag. Using two of the packaging materials having a size of 230 mm × 125 mm, the surfaces having heat fusibility are overlapped with each other, and the periphery is heat-fused to form a bag shape. The exothermic precursor was sealed to produce a plurality of outer bag-encapsulated segmented exothermic part exothermic precursors.

The exothermic precursor containing the outer bag-enclosed segment heat generating part is held in a thermostatic bath at a temperature of 50 ° C. for 30 days, and has a water-containing heat generating composition with an excess water value of 0 and a rising temperature rising rate of 42 ° C./5 minutes. Got. The minimum bending resistance of the heating element, which is a bending / soft heating element, was 60 mm, and the minimum bending resistance change was zero. At least flexibility and softness were maintained not only before the heat generation but also after the heat generation. Thereby, it can be seen how excellent the flexibility and flexibility of the heating element according to the present invention are.
The total weight of the hydrous exothermic composition of the heating element was 18 g.

(Comparative Example 2)
A plurality of heating elements were prepared in the same manner as in Example 6 except that the loop stiffness of the storage body was set to 1000 mN / cm.

(Comparative Example 3)
A plurality of heating elements were prepared in the same manner as in Comparative Example 2 except that the total weight of the water-containing heating composition of the heating element was 54 g.

For the heating elements of Example 6, Comparative Example 2, and Comparative Example 3, the minimum bending resistance and use evaluation were performed. The usage evaluation method evaluated the feeling of use of the heating element by performing a monitor test with 10 panelists. The result shown in Result 4 was obtained.

Usability evaluation Good: Flexible, not stiff, smooth along the body, no resilience to return, feels soft when touched, and feels soft Soft and comfortable to use.
Defective: Inflexible, stiff, repulsive when trying to follow the body, feels firm when gripped by hand, feels hard and uncomfortable to use.

(Result 4)

Example: Exothermic composition: Loop: Minimum bending resistance: Evaluation of use Total weight Stiffness
(G) (mN / cm) (mm)

Example 6: 18: 98: 48: Good Comparative Example 2: 18: 1000: Unmeasurable: Defect Comparative Example 3: 54: 1000: 68: Defect

In this way, by comparing the heating element defined only by the minimum bending resistance that defines the flexibility and the heating element defined by the loop stiffness that defines the resilience and the flexibility,
1) A heating element using a storage body having a low loop stiffness as in Example 6 has high flexibility and low resilience and good softness to the touch, and the warming body has smoothness along the side, and heat is generated. There is practical flexibility as a body.
2) On the other hand, the heating element defined by only the minimum bending resistance as in Comparative Example 2 and Comparative Example 3 can keep the apparent flexibility low due to the total weight of the heating composition, but the resilience of the storage body , Alongside, and resilience of the heating element, the alongness is not stipulated, there is a resilience to return to the original when it is along the body, the section is also inflexible, practically flexible as a heating element There is no sex.
3) The practical flexibility of a heating element having a plurality of segmented heating parts cannot be defined by the minimum bending resistance, and it is indispensable to define it by loop stiffness.
As described above, the heating element with the loop stiffness of the storage body of the present invention set to 700 mN / cm or less has no resilience when placed along a curved surface, and has a practical flexibility with a good fit and feel. Had.

(Example 7)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a hydrous exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 20, there was no moldability, and the temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a nylon non-woven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer on one side and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the coating material was 400 g / (m 2 · day) in terms of moisture permeability by the Lissy method.
Using a 2.0 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering material so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and the interval between the six segment heat-generating parts as the heat-seal area The heat generating part has a heat generating part of 77 mm long × 15 mm wide and a heat generating part of 77 mm long × 5 mm wide, the seal width of the peripheral part is 8 mm, and the heat generating precursor is 131 mm long × 93 mm wide. Created multiple bodies.

  A packaging material having a moisture permeability of 1.1 g / (m 2 · day) was used as a packaging material for outer bags. Using two of the packaging materials having a size of 230 mm × 125 mm, the surfaces having heat-fusibility are overlapped with each other, and the periphery is heat-fused to form a bag shape. The exothermic precursor was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor prepared as described above is held in a thermostatic bath at a temperature of 50 ° C. for 30 days, and a hydrous exothermic composition having an excess water value of 0 and a rising temperature rising rate of 24 ° C./5 min. A plurality of heating elements were obtained. The heating element is provided at intervals, with the six divided heat generating portions being the heat sealing region, and the divided heat generating portions are 77 mm long × 15 mm wide, and the divided portions are 77 mm long × 5 mm wide. The peripheral seal width is 8 mm, and the length is 131 mm × width 93 mm. The heating element was taken out from the outer bag and the physical properties were measured. The loop stiffness of the heating element storage body was 98 mN / cm. The minimum bending resistance was 48 mm, and the minimum bending resistance change was zero. Further, the heating element was taken out from the outer bag and fixed to the waist with the adhesive layer, and the heat generation test was carried out, but it was fixed tightly along the waist and became warm immediately, and the warm time continued for 6 hours or more. The heating element had excellent heat generation performance and excellent flexibility, had a good feeling in use, and was a practical heating element.

(Comparative Example 4)
A plurality of heating elements similar to those in Example 7 were prepared except that the loop stiffness of the storage body was set to 1000 mN / cm. The heating element was taken out from the outer bag, fixed to the waist with the adhesive layer, and a heat generation test was conducted. There was no heat-generating body that had a poor usability and was not practical. The minimum bending resistance was not measurable.

(Example 8)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 1 part by weight, 0.5 part by weight of slaked lime, 0.7 part by weight of sodium sulfite, and 11% saline were mixed to prepare an excess water exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the coating material was 600 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.0 mm thick mold having six through-holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and the polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. With a heat generating part of 82 mm in length x 15 mm in width, a heat generating part in the dividing part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generating precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 1.1 g / (m ² · day) was used as a packaging material for outer bags. Using two of the packaging materials having a size of 230 mm × 125 mm, the surfaces having heat-fusibility are overlapped with each other, and the periphery is heat-fused to form a bag shape. The exothermic precursor was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor is placed in a room without air conditioning and kept for 360 days by natural storage, and then has a hydrous exothermic composition with an excess water value of 0 and a rising temperature rising rate of 20 ° C./5 min. A heating element was obtained. The loop stiffness of the heating element storage body was 200 mN / cm. The room temperature was 36 ° C. during the 360 days. Further, the heating element was taken out from the outer bag, fixed to clothes with an adhesive layer, and subjected to a heating test. However, it immediately became warm and the warm time lasted for 6 hours or more. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

Example 9
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare an excess water exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 450 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 2.5 mm thick mold having six through-holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering material so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and the interval between the six segment heat-generating parts as the heat-seal area With a heat generating part of 82 mm in length x 15 mm in width, a heat generating part in the dividing part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generating precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 1.3 g / (m ² · day) was used as a packaging material for outer bags. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor is placed in a room without air conditioning and kept for 180 days by natural storage, and then has a hydrous exothermic composition with an excess water value of 0 and a rising temperature rise rate of 26 ° C./5 min. A heating element was obtained. The maximum temperature during the 180 days was 36 ° C. In addition, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was performed, but the heating element was bent from the section, was fixed tightly along the clothes, and immediately became warm, Warm time lasted over 6 hours. The heating element storage body had a loop stiffness of 98 mN / cm, the maximum tensile strength at 25 ° C. of at least one section was 155 g / mm, and the elongation at break was 98%. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 10)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare a surplus water heating composition. The excess water value of the excess water exothermic composition was 10, and the rising temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 450 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.2 mm-thick mold having 8 through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and the polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the eight divided heat-generating parts as the heat-seal areas as the intervals. A heating element having a heating part of 82 mm × width of 12 mm, a heating part of 82 mm × width of 6 mm, and a peripheral seal width of 6 mm, a length of 152 mm × width of 94 mm. A plurality of were made.

A packaging material having a moisture permeability of 1.6 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 180 days by natural preservation to obtain a exothermic body. The heating element had a hydrous exothermic composition with an excess water value of 0 and a rising temperature rising rate of 19 ° C./5 minutes. The maximum temperature during the 180 days was 36 ° C. Further, the heating element was taken out from the outer bag, fixed to clothes with an adhesive layer, and subjected to a heating test. However, it immediately became warm and the warm time lasted for 8 hours or more. The heating element storage body had a loop stiffness of 150 mN / cm, and one section had a loop stiffness of 220 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 11)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 20, and the rising temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 450 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.5 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. With a heat generating part of 82 mm in length x 15 mm in width and a heat generating part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generation precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 1.3 g / (m ² · day) was used as a packaging material for outer bags. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 120 days by natural preservation to obtain a exothermic body. The heating element had a water-containing heating composition with an excess water value of 0 and a rising temperature rising rate of 25 ° C./5 minutes. The maximum temperature during the 120 days was 36 ° C. In addition, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was performed, but the heating element was bent from the section, was fixed tightly along the clothes, and immediately became warm, Warm time lasted more than 8 hours. The loop stiffness of the heating element storage body was 49 mN / cm, and the loop stiffness of one section was 88 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

Example 12
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.0 mm thick mold having six through-holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and the polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. With a heat generating part of 82 mm in length x 15 mm in width, a heat generating part in the dividing part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generating precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 2.8 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 90 days by natural preservation to obtain a exothermic body. The heating element had a water-containing heating composition with an excess water value of 0 and a rising temperature rising rate of 17 ° C./5 minutes. As for the room temperature, the maximum temperature during 90 days was 36 ° C, and the average temperature was about 25 ° C. In addition, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was performed, but the heating element was bent from the section, was fixed tightly along the clothes, and immediately became warm, Warm time lasted over 6 hours. The loop stiffness of the heating element storage body was 350 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 13)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 20, and the rising temperature rising rate was 8 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.5 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. With a heat generating part of 82 mm in length x 15 mm in width and a heat generating part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generation precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 2.0 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 120 days by natural preservation to obtain a exothermic body. The heating element had a water-containing heating composition with an excess water value of 0 and a rising temperature rising rate of 35 ° C./5 minutes. The maximum temperature during 120 days was 36 ° C. The heating element was taken out from the outer bag, fixed to the clothes with the adhesive layer, and subjected to a heat generation test, but the heating element was bent from the section and was fixed tightly along the clothes, immediately becoming warm and warm. Continued for more than 8 hours. The heating element storage body had a loop stiffness of 95 mN / cm, and one section had a loop stiffness of 156 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 14)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare an excess water exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 30, and the rising temperature rising rate was 7 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the coating material was 600 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.0 mm thick mold having six through-holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and the polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. With a heat generating part of 82 mm in length x 15 mm in width, a heat generating part in the dividing part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generating precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 2.8 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 180 days by natural preservation to obtain a exothermic body. The heating element had a water-containing heating composition with an excess water value of 0 and a rising temperature rising rate of 37 ° C./5 minutes. As for the room temperature, the maximum temperature during 180 days was 36 ° C., and the average temperature was about 25 ° C. In addition, the heating element was taken out from the outer bag and fixed to the clothes with the adhesive layer, and the heat generation test was performed, but the heating element was bent from the section, was fixed tightly along the clothes, and immediately became warm, Warm time lasted over 6 hours. The loop stiffness of the heating element storage body was 30 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 15)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.3 parts by weight, water-absorbing polymer (particle size 300 μm or less) 5 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 20, and the rising temperature rising rate was 8 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
Laminate of polypropylene nonwoven fabric and polyethylene porous film, breathable coating material, polyethylene film with separator on one side, SIS adhesive layer, and ethylene-vinyl acetate copolymer film on the other side The laminate was used as a non-breathable substrate. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 1.5 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering materials so that the surfaces overlap each other, heat-seal and cut the peripheral edge of the exothermic composition molded body, and set the six segment heat-generating parts as heat-seal areas as intervals. With a heat generating part of 82 mm in length x 15 mm in width and a heat generating part of 82 mm in length x 6 mm in width, a seal width in the peripheral part of 6 mm, and a heat generation precursor of 127 mm in length x 94 mm in width Created multiple bodies.

A packaging material having a moisture permeability of 2.0 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag-encapsulated exothermic precursor was placed in a room without air conditioning and kept for 120 days by natural preservation to obtain a exothermic body. The excess water value of the hydrous exothermic composition of the heating element was 0. The rising temperature rising rate was 35 ° C./5 minutes. The maximum temperature during 120 days was 36 ° C. The heating element is taken out from the outer bag, and the heating element is taken out from the outer bag and fixed to the waist with the SIS-based adhesive layer, and the heat generation test is performed.The heating element is bent from the section, It was fixed tightly along the waist, warmed up quickly and warmed up for over 6 hours. The heating element was a heating element having excellent heat generation performance and excellent flexibility. The heating element storage body had a loop stiffness of 95 mN / cm, and one section had a loop stiffness of 156 mN / cm. The rising temperature rising rate was greatly improved, and it became a hydrous exothermic composition that warms up quickly. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 16)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 8 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare a surplus water heating composition. The surplus water value of the surplus water-containing exothermic composition was 25, and the rising temperature rising rate was 6 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
Non-breathable laminate with polypropylene nonwoven fabric and polyethylene porous film, breathable coating, polypropylene nonwoven fabric on one side of polyethylene film, and ethylene-vinyl acetate copolymer film on the other side Used as a base material. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 2.0 mm thick mold having six through holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and a polyethylene film Cover the covering material so that the surfaces overlap each other, heat-seal the periphery of the exothermic composition molded body, and then apply a mesh-like ventilation made of a SIS-based adhesive to the breathable surface by a melt blow method. A pressure-sensitive adhesive layer is provided, and a separator is applied and cut, and the six divided heat generating portions are provided at intervals, with the divided portions being the heat seal regions as intervals, and the divided heat generating portions are 82 mm long × 15 mm wide. A plurality of heating elements each having a heating part of 82 mm in length × 6 mm in width and a seal width of 6 mm in the peripheral part and 127 mm in length × 94 mm in width were prepared.

A packaging material having a moisture permeability of 1.6 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.
In both cases, the exothermic precursor was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The exothermic precursor encapsulated in the outer bag was placed in a room without air conditioning, and was kept for 270 days by natural storage to obtain a heating element. The surplus water value of the hydrous exothermic composition of the heating element was 0. The rising temperature rising rate was 19 ° C./5 minutes. The maximum temperature during the 270 days was 36 ° C. Taking out the heating element from the outer bag, cutting off the heating element consisting of a divided heating part and a section of the heating element and leaving a seal area around it, and measuring the loop stiffness of the container excluding the heating composition, 80 mN / cm was obtained. The minimum bending resistance was 48, and the minimum bending resistance change was 0. Further, the heating element was taken out from the outer bag, and the heat-permeable test was performed by fixing the inner side of the underwear so that the air-permeable pressure-sensitive adhesive layer faced the inner side of the underwear. Along with the body, it was fixed tightly, became warm immediately, and the warm time lasted more than 6 hours. The heating element was a heating element having excellent heat generation performance and excellent flexibility.

(Example 17)
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 7.0 parts by weight, wood powder (particle size 150 μm or less) 3.0 parts by weight, water-absorbing polymer (particle size 300 μm or less) 0 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite, and 11% saline were mixed to prepare an excess water exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 15, and the rising temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define.
A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the covering material was 300 g / (m ² · day) in terms of moisture permeability by the Lissy method.
Using a 0.5 mm thick mold having 10 through-holes, the exothermic composition molded body obtained by molding the surplus water exothermic composition through the mold was laminated on the polyethylene film surface of the substrate, and the polyethylene film Cover the covering material so that the surfaces overlap each other, heat seal the peripheral edge of the exothermic composition molded body, cut it, and set the 10 divided heat generating parts as the heat sealed area as the interval. An eye mask having a heating part of 60 mm long × 10 mm wide, a heating part of 60 mm long × 8 mm wide, and a peripheral seal width of 10 mm, length of 188 mm × 80 mm wide A plurality of shaped exothermic precursors were prepared. Furthermore, both ends of the ear hook made of a non-woven fabric that can be cut off at the center are attached to both ends in the longitudinal direction of the eye heating element through an adhesive, and an eye mask type eye heating precursor Several bodies were made.

A packaging material having a moisture permeability of 2.8 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The outer bag filled eye temperature exothermic precursor was placed in a room without air conditioning and kept for 90 days by natural preservation to obtain an eye mask type eye temperature exothermic body. The eye temperature heating element had a water-containing heating composition with an excess water value of 0 and a rising temperature rising rate of 21 ° C./5 minutes. The room temperature was 36 ° C. during 90 days. Next, the eye temperature heating element was taken out from the outer bag, and the exothermic test was carried out by fixing it to the eyes with the ear hooks so that the breathable side was facing the eyes and covered the eyes, but it quickly became warm and warm. The optimal temperature lasted for more than 10 minutes. The eye temperature heating element was a heating element having excellent heat generation performance and excellent flexibility. The loop stiffness of the heating element storage body was 98 mN / cm. As the storage body, a heat generating portion area composed of a divided heat generating portion and a dividing portion was adopted.

(Example 18)
It consists of a two-layer laminate of air-through nonwoven fabric (texture) / polyethylene porous film in which three 2 mmφ perforations are provided at equal intervals on the entire ventilation surface of the eye mask-shaped eye temperature exothermic precursor of Example 14. The local ventilation material is covered so that three perforations are arranged in each section, fixed to the peripheral part of the exothermic precursor through a fixing part made of an adhesive, and the moisture permeability is 5000 g / ( A texture material composed of a three-layer laminate of spunbond nonwoven fabric (strength) / melt blown nonwoven fabric (breathing) / thermal bond nonwoven fabric (texture) exceeding m ² · day) was provided to produce a temperature-temperature exothermic precursor. In the same manner as in Example 14, a plurality of outer bag-enclosed eye temperature exothermic precursors were produced. The moisture permeability of the outer bag was 2.8 g / (m ² · day).

The outer bag filled eye temperature exothermic precursor was placed in a room without air conditioning and kept for 90 days by natural preservation to obtain an eye mask type eye temperature exothermic body. The eye temperature heating element had a water-containing heating composition with an excess water value of 0 and a rising temperature rising rate of 12 ° C./5 minutes. The room temperature was 36 ° C. during 90 days. Next, the eye temperature heating element was taken out from the outer bag, and the exothermic test was carried out by fixing it to the eyes with the ear hooks so that the breathable surface was directed outwards and covering the eyes. Warm and moderate temperature lasted for more than 10 minutes. The eye temperature heating element was a heating element having a good texture, good touch to the eyes, excellent heat generation performance and excellent flexibility. The loop stiffness of the heating element storage body was 98 mN / cm.

Example 19
Iron powder (particle size 300 μm or less) 100 parts by weight, activated carbon (particle size 300 μm or less) 5.5 parts by weight, wood powder (particle size 150 μm or less) 2.4 parts by weight, water-absorbing polymer (particle size 300 μm or less) 2 parts by weight, 0.5 parts by weight of slaked lime, 0.7 parts by weight of sodium sulfite and 11% saline were mixed to prepare an excess water-containing exothermic composition. The surplus water value of the surplus water-containing exothermic composition was 40, and the rising temperature rising rate was 0 ° C./5 minutes. The surplus water value is obtained by filter paper No. 1 manufactured by Nakamura Science Co., Ltd. 2 (circular) was used to define. A laminate comprising a polypropylene nonwoven fabric and a polyethylene porous film, a breathable coating material, a polyethylene film with a pressure-sensitive adhesive layer with a separator on one side, and an ethylene-vinyl acetate copolymer film on the other side. Used for non-breathable substrate. The breathability of the coating material was 290 g / (m ² · day) in terms of moisture permeability by the Lissy method.
The exothermic composition molded body that was molded through a mold having a thickness of 1.2 mm having two through holes was laminated on the polyethylene film surface of the substrate so that the polyethylene film surfaces overlap each other. Cover the covering material, heat seal the peripheral edge of the exothermic composition molded body, cut it, the seal width of the peripheral part of the heating element is 8 mm, and there are two segmented heat generating parts, and the segmented part is long A nasal temperature which is a kind of mask-shaped face temperature exothermic precursor having a heat generating portion of 30 mm × width 22 mm, a section heat generating portion 30 mm long × 15 mm wide at the top, a seal width of 8 mm, length 116 mm × width 95 mm An exothermic precursor was prepared. Further, a local ventilation material, which is a non-breathable polyethylene film, is provided on the ventilation surface via an adhesive so that air can be ventilated only from both ends of each section. Further, rubber is provided at both ends in the longitudinal direction of the heating element. A plurality of nasal temperature exothermic precursors were prepared.

A packaging material having a moisture permeability of 2.8 g / (m ² · day) was used as a packaging material for an outer bag. Two sheets of 230 mm × 125 mm in size are used so that the surfaces having heat fusibility are inside each other, and the periphery is heated and fused to form a bag shape. The body was sealed to produce a plurality of outer bag-encapsulated exothermic precursors.

  The nasal temperature exothermic precursor enclosed in the outer bag was placed in a thermostatic bath at 50 ° C. and held for 30 days to obtain a mask-shaped nasal temperature exothermic body. The nasal heating element had a water-containing heating composition with an excess water value of 0 and a rising temperature rising rate of 20 ° C./5 minutes. Moreover, the difference in the rising temperature rising rate of the excess water exothermic composition and the hydrous exothermic composition was 20 ° C./5 minutes. Next, the nose temperature heating element was taken out from the outer bag, and the fever test was performed with the ear heating part fixed to the face so that the upper heating part was located around the nose. A pleasant warm time lasted more than 2 hours. This is particularly effective for measures to warm the nose such as hay fever. The nasal temperature heating element was a heating element having excellent heat generation performance and excellent flexibility. The loop stiffness of the heating element storage body was 98 mN / cm. As the storage body, a heat generating portion area composed of a divided heat generating portion and a dividing portion was adopted.

(A) It is a top view which shows an example of the division heat generating part heat generating body of this invention. (B) It is a top view which shows an example of the stripe heating element of this invention. (A) It is a top view which shows an example of the rigid soft heating element of this invention. (B) It is sectional drawing of the AA. (C) It is sectional drawing which shows another example of the rigid soft heating element of this invention. (D) It is sectional drawing which shows another example of the rigid soft heating element of this invention. (A) It is a top view which shows an example of the separable heating element of this invention. (B) It is a top view which shows an example of a small heat generating body. (C) It is a top view which shows another example of the separable heating element of this invention. (D) It is a top view which shows another example of a small heat generating body. (A) It is a top view which shows an example of the expansion-contraction heating element of this invention. (B) It is sectional drawing of the same BB. (A) It is a top view which shows another example of the expansion-contraction heating element of this invention. (B) It is a top view which shows another example of the expansion-contraction heating element of this invention. It is a top view which shows an example of the band heat generating body of this invention. (A) It is a top view which shows an example of the tunnel ventilation heat generating body of this invention. (B) It is sectional drawing of CC. (A) It is a partial expanded sectional view which shows an example of the vicinity of the space part of the tunnel ventilation heat generating body of this invention. (B) It is a partial expanded sectional view which shows another example of the vicinity of the space part of the tunnel ventilation heat generating body of this invention. (A) It is a top view which shows an example of the chemical | medical agent heat generating body of this invention. (B) It is sectional drawing of the DD. (C) It is a top view which shows another example of the chemical | medical agent heat generating body of this invention. (D) It is sectional drawing which shows another example of the chemical | medical agent heat generating body of this invention. (A) It is a top view which shows another example of the chemical | medical agent heat generating body of this invention. (B) It is sectional drawing of the same EE. (A) It is a top view which shows an example of the separable medicine heating element of this invention. (B) It is sectional drawing of the FF. (C) It is sectional drawing which shows an example of a small medicine heat generating body. (A) It is a top view which shows an example of the eye temperature heat generating body of this invention. (B) It is sectional drawing of the same GG. (C) It is a top view which shows another example of the eye temperature heat generating body of this invention. (D) It is sectional drawing which shows another example of the eye temperature heat generating body of this invention. (E) It is a top view which shows an example of the face temperature heating element of this invention. (F) It is a perspective view which shows another example of the face temperature heating element of this invention. (G) It is a top view which shows an example of the nasal temperature heating element of this invention. (H) It is a top view which shows another example of the tunnel ventilation heating element for face temperature heating elements of this invention, and a nasal temperature heating element. (A) It is a top view which shows an example of the rigid soft heating element before being folded of this invention. (B) It is a top view which shows an example of the outer temporary attachment folding heat generating body with an outer bag of this invention. (C) It is sectional drawing of the same HH. (D) It is a top view which shows another example of the outer temporary attachment folding heat generating body with an outer bag of this invention. It is a top view which shows the filter paper which provided the reference line. It is sectional drawing which shows a measuring apparatus. It is sectional drawing which shows operation. It is sectional drawing which shows a measurement. It is a top view which shows the filter paper which calculates a surplus water value. It is sectional drawing which shows the softness | flexibility of a rigid soft heating element. It is sectional drawing which shows the non-flexibility of a single heat generating part heat generating body. (A) It is a plane which shows an example of the staggered cut which is a kind of intermittent cut. (B) It is a top view which shows an example of the perforation which is a kind of intermittent cut. (C) It is a top view which shows another example of the perforation which is a kind of intermittent cut. (A)-(d) It is sectional drawing explaining moldability. (A)-(d) It is sectional drawing explaining a non-molding property.

Explanation of symbols

2 Single heating element heating element 3 Division heating element heating element 4 Rigid soft heating element 5 Stripe heating element 6 Separable heating element 6A Small heating element 7 Telescopic heating element 8 Band heating element 9 Tunnel ventilation heating element 10 Drug heating element 10A separation Free medicine heating element 10B Small medicine heating element 11 Temporary folding folding heating element 12 with outer bag 12 Water-containing heating composition 13 Heating part 14 Division heating part 15 Sorting part 16 Sealing part 17 Covering material 18 Base material 19 Adhesive layer 20 Breathability Adhesive layer 21 Surface fastener 22 Separator 23 Intermittent cut 24 Cut part 25 Joint part 26 Perforation 27 Alternate cut 28 Notch (V notch, U notch, I notch, etc.)
29 Fixed part (adhesive layer, adhesive layer, heat seal layer, etc.)
30 Local ventilation material 31 Space part 32 Vent hole 33 Ventilation blocking sheet 34 Handle 35 Packaging material (band)
36 outer bag 37 outer temporary attachment layer 38 seal part 39 folded heating element 40 filter paper 41 reference line 42 measuring plate (measuring plate having a cylindrical through hole)
43 Cylindrical through-hole 44 Cylindrical through-hole diameter 45 Cylindrical through-hole height 46 Cylindrical through-hole diameter circle 47 Support plate 48 Filling plate 49 Holding plate 50 Non-water-absorbing plastic film (polyethylene film, etc.)
51 Penetration trace 52 Penetration distance 53 Exothermic composition 54 Surplus water value measuring device
55 Supporting base 56 Side ventilation part 57 of section heating part 57 Top part of section heating part 58 Mold formability measuring device 59 Magnet 60 Eye heating element
61 eyes
62 Textured material
63 Face temperature heating element
63A nasal heating element
64 mask
65 Heating element (heating part) holding part
66 Heating element (heating part) storage part
67 Ear hook
68 holes
69 Ear straps, ear rubber

Claims (13)

  A water-containing heat-generating composition having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 12 ° C./5 minutes or more, and a plurality of divided heat-generating part regions And the section is integrated, and at least a part is provided with a breathable storage body, a section heating section that is a section heating section in which the water-containing heating composition is stored, and a non-storage area of the heating composition, A partitioning portion that is a hinge is integrated, a plurality of partition heating portions are provided at intervals with the partitioning portion as an interval, and at least a part has air permeability, and the partition heating portion region and the partitioning portion of the storage body A heating element characterized in that at least one loop stiffness in the longitudinal direction across the substrate is 700 mN / cm or less and has flexibility based on a structural flexibility function and an articulation flexibility function.   At least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the container is 700 mN / cm or less, and the maximum tensile strength at 25 ° C. of the at least one section is 20 g / mm width or more. The heating element according to claim 1, wherein the elongation at break at 25 ° C is 5% or more.   At least one loop stiffness in the longitudinal direction crossing the divided heat generating region and the divided portion of the storage body is 700 mN / cm or less, and the loop stiffness of at least one of the divided portions is 700 mN / cm or less. The heating element according to claim 1.   At least one loop stiffness in the longitudinal direction across the section heating portion region and the section that is the seal region of the container is 700 mN / cm or less, and intermittent cuts are made in at least a partial region of the section. The heating element according to claim 1, wherein the heating element is provided.   At least one loop stiffness in the longitudinal direction across the section heat generating area of the container and the section that is the seal area is 700 mN / cm or less, and at least a part of each section heat generating section is covered with a local ventilation material; It has a space surrounded by the ventilation side of the segmental heat generating part, the segmented part and the local ventilation material, and at least the side ventilation part facing the space part of the segmented heat generating part is ventilated to the heat generating composition. The heating element according to any one of claims 1 to 4.   At least one loop stiffness in the longitudinal direction across the section heating portion area of the storage body and the section that is a seal area is 700 mN / cm or less, the heating element has a minimum bending resistance of 70 mm or less, and the minimum bending resistance The heating element according to any one of claims 1 to 5, wherein the degree of change is -95 to 0 and has flexibility based on a structural flexible function and an articulated flexible function.   The heating element having the water-containing heating composition is a segment heating part heating element, a rigid and soft heating element, a stripe heating element, a detachable heating element, an expansion heating element, a band heating element, a tunnel ventilation heating element, a drug heating element, and a detachable heating element. Tunnel aeration heating element, separable medicine heating element, eye temperature heating element, face temperature heating element, outer temporary folding heating element with outer bag, the hydrous heating composition is iron powder, carbon component, A reaction accelerator, water as an essential component, an excess water value of 0, a rising temperature rising rate of 12 ° C./5 minutes or more, and a divided heat generating region and a seal region of the housing constituting the heat generating member At least one loop stiffness across the section is 700 mN / cm or less, and at least one of the sections has a maximum tensile strength at 25 ° C. of 20 g / mm width or more. , And elongation at break of 5% or more at 25 ° C., the minimum bending resistance of the heating element is not more 70mm or less, heating element according to claim 1, the minimum bending resistance difference is equal to or less than 0 mm.   The at least one loop stiffness in the longitudinal direction crossing the divided heat generating area of the storage body constituting the heat generating element after the end of heat generation and the divided area as the seal area is 700 mN / cm or less. The heating element according to any one of the above.   An exothermic part provided with an interval, with a plurality of divided heat generating parts as seal parts, containing a water-containing heat generating composition containing iron powder, carbon component, reaction accelerator and water as essential components. A heating element having an excess water value of 0, a rising temperature rising rate of 40 ° C./5 minutes or more, and a minimum bending resistance of the heating element of 70 mm or less, The heating element according to claim 1, wherein the minimum bending resistance change is -95 to 0.   A separate heat generating area, which is an area where the exothermic composition containing iron powder, carbon component, reaction accelerator, and water as essential components is stored, and a non-storage area of the exothermic composition, and the dividing area, which is a seal area, are integrated. And a plurality of divided heat generating region are provided at intervals with the divided portion as an interval, and at least a part thereof is air permeable, and at least one of the longitudinal direction across the divided heat generating region and the divided portion of the storage body. One heating element storage body having a loop stiffness of 700 mN / cm or less.   11. The heating element according to claim 10, wherein the maximum tensile strength at 25 ° C. of the at least one section of the storage body is 20 g / mm width or more and the elongation at break at 25 ° C. is 5% or more. Storage body. A container having a structure composed of a divided heat generating portion region and a divided portion region that is a connecting portion has an excess water value of 0.5, with iron powder, a carbon component, a reaction accelerator, and water as essential components in the divided heat generating portion region. The exothermic composition molded body obtained by molding the -80 excess water exothermic composition is accommodated, and a plurality of segmented heat generating portions are provided at intervals with a segmented portion that is a hinge as an interval. The portion has air permeability, and at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region and the divided portion of the container is 700 mN / cm or less, and is flexible based on the structural flexible function and the joint flexible function. An exothermic precursor having the property of being encased in an outer bag, which is a container composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day), in a natural environment not damaged, and , Holding temperature 1-80 ° C and holding humidity 95 % In a controlled environment selected from below control environment, and the retention period is 25 hours to 2 years, making iron powder, carbon component, reaction accelerator and water essential components, excess water A segmental heat generating part that contains a hydrous exothermic composition having a value of 0 and a rising temperature rising rate of 12 ° C./5 minutes or more and a segmented part that is a hinge are integrated, and a plurality of segmented heat generating parts are segmented. And at least a part of the heating element is air permeable, and at least one loop stiffness in the longitudinal direction crossing the section heating section region and the section of the storage body is 700 mN / cm or less A method of manufacturing a heating element, characterized by manufacturing a heating element having flexibility based on a structural flexible function and an articulating flexible function. A container having a structure composed of a divided heat generating portion region and a divided portion region that is a connecting portion has an excess water value of 0.5, with iron powder, a carbon component, a reaction accelerator, and water as essential components in the divided heat generating portion region. The exothermic composition molded body obtained by molding the -80 excess water exothermic composition is accommodated, and a plurality of segmented heat generating portions are provided at intervals with a segmented portion that is a hinge as an interval. The portion has air permeability, and at least one loop stiffness in the longitudinal direction crossing the divided heat generating portion region and the divided portion of the container is 700 mN / cm or less, and is flexible based on the structural flexible function and the joint flexible function. The exothermic precursor having the property is composed of a packaging material having a moisture permeability of 0.1 to 6.0 g / (m ² · day) and an oxygen permeability of 0.05 to 10 ml / (m ² · day) Encased in an outer bag that is a container and damaged In a natural environment and in a kind of environment selected from a controlled environment where the holding temperature is 1 to 80 ° C. and the holding humidity is 95% or less, and the holding period is 25 hours to 2 years, A segmental heat generating unit containing a water-containing heat generating composition having iron powder, a carbon component, a reaction accelerator and water as essential components, an excess water value of 0, and a rising temperature rising rate of 40 ° C./5 minutes or more; A partitioning portion that is a hinge is integrated, a plurality of partitioning heat generating portions are provided at intervals with the partitioning portion as an interval, and at least a part of the heating element has air permeability, and the partitioning heat generating region of the storage body And a heating element having a flexibility based on a structural flexible function and an articulating flexible function, wherein at least one loop stiffness in a longitudinal direction across the section is 700 mN / cm or less. Production method.