JPH09253118A - Disposable body warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the manufacturing process without changing the component or composition of a heating composition and sufficiently satisfy the quick starting of heating and the continuity of heating time by forming a disposable body warmer of two divided packages, and varying air permeability between the housing bags of the respective divided packs. SOLUTION: This disposable body warmer is formed of two packages formed by inserting a polyethylene film sheet 5, for example, between one side sheet 2 and the other side sheet 3 of a housing bag, and filling the two formed spaces with a powdery heating composition 6, respectively. The one side sheet 2 and the other side sheet 3 have air holes (a) and strip ventilating parts 4, 4' differed in width, respectively. This disposable body warmer 1 is housed and stored in an impermeable plastic film, broken in use, and used with the sheet 3 having the wider strip ventilating part 4' in contact with the body, whereby the body can be quickly heated, the duration of heating is also sufficient, and this body warmer can be comfortably fitted to the body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable body warmer, and more particularly to a disposable body warmer in which an exothermic composition containing iron powder, activated carbon, salts, a water absorbent resin and water is enclosed in a breathable storage bag. It is about improvement.

[0002]

2. Description of the Related Art A heat-generating composition containing iron powder, activated carbon, salts, a water-absorbent resin and water does not require ignition and simply heats up by contacting with air, resulting in excellent usability. A disposable body warmer in which an item is enclosed in a breathable storage bag is widely used. At present, in many disposable body warmers, a breathable material is provided by forming a needle hole in a storage bag material in which a sealant such as polyethylene is laminated on a non-woven fabric or using a porous film as a material of the storage bag. Regarding the heat generation performance of the disposable body warmer, three items, that is, the rising speed of heat generation, the maximum temperature, and the duration of heat generation are mainly inspected. Of these, the rising speed of heat generation is specified in JIS S4100 Time to reach ", and currently available single-use body warmers generally range from 10 to 20 minutes. Recently, there has been an increasing demand from consumers for a disposable body warmer in which the rise rate of heat generation is shortened to about 5 minutes. It has the drawback of becoming too high and of extremely short duration. On the other hand, the problem of shortening the heat generation time cannot be avoided even by the method of increasing the air permeability of the material of the storage bag as a whole. Under such circumstances, it has been considered difficult to develop a disposable body warmer with a rapid onset of heat generation and a sufficiently long heat generation time.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a simple and easy manufacturing process without changing the components and composition of the exothermic composition.
An object of the present invention is to provide a disposable body warmer that can sufficiently satisfy the rapid rising rate of heat generation for about 5 minutes and the sustainability of heat generation time.

[0004]

DISCLOSURE OF THE INVENTION In order to solve the above problems, the inventors of the present invention have conducted extensive studies and as a result, as a result, a disposable body warmer that can solve the above problems by combining two sachets having different breathability. The inventors have found that the following can be obtained and completed the present invention.

That is, the invention of claim 1 is a disposable body warmer in which a heat-generating composition containing iron powder, activated carbon, salts, a water-absorbent resin, and water is enclosed in a breathable storage bag. The present invention relates to a disposable body warmer, which is characterized in that the storage bags of the individual sachets have different breathability.

The components and composition of the exothermic composition used in the present invention are not limited at all, and any conventionally known one can be used. The iron powder constituting the exothermic composition is the main component involved in the exothermic reaction of oxidation, such as reduced iron, cast iron, etc., and powdered ones are generally used, but granular ones, fibrous ones and the like are mixed. Good. In addition, activated carbon and salts are necessary as an oxidation reaction accelerator for iron powder, and examples of the salts include sodium chloride, potassium chloride, magnesium chloride and the like.

As the water-absorbent resin, one having a high water-retaining ability and capable of keeping the whole in a free-flowing state is preferable in the production. For example, isobutylene-maleic anhydride copolymer, polyvinyl alcohol-acrylate copolymer, starch-acrylate graft copolymer, polyacrylate cross-linked product, acrylate-acrylate copolymer, acrylic Examples thereof include acid salt-acrylamide copolymers and hydrolyzates of polyacrylonitrile crosslinked products, but are not limited thereto. Of course, wood powder as a water retention agent,
A base material such as perlite or vermiculite may be used in combination.

In the exothermic composition used in the present invention, in addition to the above-mentioned components, a weak acid salt of an alkyl metal, a weak acid salt of an alkaline earth metal, a hydrogen generation inhibitor such as metasilicate, an extender, an α
-A content biasing agent such as starch or a substance such as zirconium or ceramics may be appropriately added. The blending ratio, the filling amount, and the like of each component of the heat-generating composition that is involved in the heat-generating performance can be arbitrarily determined according to the purpose of use and application of the disposable body warmer.

The storage bag for enclosing the exothermic composition used in the present invention is not limited at all, but for example, a bag material obtained by laminating a film of polyethylene, polypropylene or the like as a sealant on a non-woven fabric or paper is perforated by opening a needle hole. And a porous film, that is, a storage bag made of polyethylene, polypropylene, polyurethanes having fine continuous pores on the surface and inside, or plastics obtained by flexibly modifying them.

The disposable body warmer of the present invention is characterized in that it is composed of two sachets and that the storage bags of the sachets have large and small differences in air permeability. In other words, the warmth is quickly warmed by making the rise of heat dependent on a large breathable package.
On the other hand, the persistence of heat generation depends on the package having low air permeability. For this reason, the breathability of the packaging bag on the side of greater breathability is selected so that the exothermic composition to be filled can rapidly generate heat, preferably up to 40 ° C. within 5 minutes, while The air permeability of the packaging bag for the package on the side with less property is selected so that the temperature of 40 ° C. or higher can be maintained for 10 hours or more after the filled exothermic composition reaches 40 ° C. Is essential. Such adjustment of air permeability of both storage bags can be performed by selecting an appropriate porous material as the material of the storage bags, or by making a part of the storage bags air-permeable. As a form of the two packagings in conformity with the gist of the present invention, for example, a plastic film sheet is inserted between two sheets having different air permeability of a storage bag,
You can configure two sachets in layers, connect them to the left and right, and use two sachets with different breathability of the storage bag. Also, a sachet with a large area and greater breathability than this, and A mode in which sachets each having a small area are vertically stacked is provided, but the present invention is not limited thereto.

According to a second aspect of the present invention, as a form of the two sachets according to the first aspect, a plastic film sheet is inserted between both sheets having different air permeability of a storage bag, and two sachets are formed into two layers. Is configured.

According to a third aspect of the present invention, in the construction of the second aspect, a polyethylene film sheet is particularly used as the plastic film sheet.

According to a fourth aspect of the present invention, as a form of the two sachets according to the first aspect, the two sachets are connected to each other on the left and right sides and the storage bags have different breathability.

According to a fifth aspect of the present invention, there are provided two sachets according to the first aspect, wherein the sachet has a large area and the storage bag has a larger air permeability and a smaller area than the sachet. It is configured by stacking one on top of the other.

[0015]

According to the first aspect of the present invention, a package having a large breathability can quickly generate heat and warm up quickly, while a package having a small breathability can maintain the heat generation. Therefore, it is possible to obtain a disposable body warmer that fully satisfies both the rising speed of heat generation and the sustainability of heat generation. The size and shape of the two packages can be appropriately determined depending on the application of the disposable body warmer and the desired heat generation performance. Also, it goes without saying that auxiliary means for attaching the disposable body warmer to the body or clothes, such as an adhesive tape, may be appropriately attached. Further, according to the present invention, there is an advantage that the object can be achieved only by changing the specification of the storage bag without changing the compounding components of the heat-generating composition.

According to the invention of claim 2, in the form of two sachets, a plastic film sheet is inserted between both sheets of the storage bag having different air permeability, and two sachets are provided in two layers. Therefore, there is no particular disadvantage in manufacturing, and the usability is excellent.

According to the invention of claim 3, in the construction of claim 2, a polyethylene film sheet having excellent barrier properties, manufacturability and economical efficiency is used as the plastic film sheet, which is more practical. You can get a perfect disposable body warmer.

According to the fourth aspect of the invention, in the form of two sachets, two sachets having different breathability of the storage bag are connected to the left and right, so that the rise of heat generation and the continuity of heat generation can be achieved. While having both capabilities, it is also possible for the user to divide the two packages separately and use each package separately.

According to the invention of claim 5, as a form of two sachets, a sachet having a large area and a sachet having a large air permeability and a small area as compared with this are vertically stacked. Therefore, there is an advantage that the latter package, which generates heat quickly, can be warmed up quickly, and two packages can be produced by simply sticking them together using, for example, an adhesive tape or the like.

The disposable body warmer of the present invention thus obtained is usually further stored in a non-breathable outer bag and used by breaking the outer bag at the time of use. It is extremely unique and practical in that it quickly rises and has excellent heat generation sustainability.

[0021]

EXAMPLES Next, the disposable warmer of the present invention will be described in more detail based on specific examples and test examples, but the present invention is not limited to these.

Example 1 As a heat-generating composition for a disposable body warmer used in this example,
Iron powder 20g, activated carbon 2.5g, sodium chloride 1.0
g, sodium metasilicate 0.5 g, wood flour 1.0 g, water absorbent resin (isobutylene-maleic anhydride copolymer system)
A mixture consisting of 1.0 g and 12 g of water was prepared. A polyethylene film sheet having a thickness of 40 μm was inserted between two sheets each having a size of 9 cm × 14 cm and perforated in a nonwoven fabric-polyethylene material to form a two-layered space. The value measured by the Gurley air permeability meter on the one-side sheet was 3 seconds / 300 cc (sample 28.3 cm ² ).
Then, a strip-shaped ventilation part having a width of 3 cm was provided, while a similar ventilation part was provided in a sheet having a width of 6 cm on the other surface side sheet. Each space was filled with 19 g of the exothermic composition described above to produce a disposable body warmer consisting of two sachets.

FIG. 1 shows a sectional view of the disposable body warmer 1 thus obtained, taken in a direction perpendicular to the belt-shaped ventilation portions 4, 4 '. The polyethylene film sheet 5 is inserted between the one-side sheet 2 and the other-side sheet 3 of the storage bag, and the two spaces thus formed are each filled with the powdery heat-generating composition 6 to form two sachets. It is configured. The one-side sheet 2 and the other-side sheet 3 have ventilation holes a and are provided with belt-shaped ventilation portions 4 and 4'having different widths.

This disposable body warmer was stored in a non-breathable plastic film. When the bag was broken at the time of use and a sheet having a band-shaped ventilation part with a width of 3 cm was used on the body side, it quickly warmed up, had a sufficient duration of heat generation, and fitted comfortably to the body.

Example 2 As a heat-generating composition for a disposable body warmer used in this example,
Iron powder 22g, activated carbon 2.5g, sodium chloride 1.0
g, sodium carbonate 0.3 g, vermiculite 1.5
g, a water absorbent resin (polyvinyl alcohol-acrylic acid copolymer system) 1.5 g, and water 11.2 g were prepared. One side is a non-breathable adhesive sheet, and the other side is a porous film with a value of 600 seconds / 50 cc (sample 28.3 cm ² ) measured by a Gurley air permeability meter, and a size of 9 cm x 14 cm. I made a bag. On the other hand, a porous bag having a value measured by a Gurley air permeability meter of 300 seconds / 50 cc was used on both sides to prepare a sachet having a size of 6 cm × 6 cm. The former sachet having a large area was filled with 30 g of the exothermic composition, and the sachet having a small area was filled with 10 g of the exothermic composition, and the both were placed on top of each other and bonded with a double-sided adhesive tape to form the disposable body warmer of the present invention. Obtained.

FIG. 2 shows a sectional view of the disposable body warmer 1 thus obtained. The heat-generating composition 6 is filled in each of the sachet 7 having a large area and the sachet 8 having a small area, and two sachets are vertically stacked. In addition,
In the figure, 9 is a body-mounting adhesive sheet, and 10 is a double-sided adhesive tape.

This disposable body warmer was stored in a non-breathable plastic film. When the bag was broken at the time of use and the adhesive sheet surface was attached to a shirt to generate heat, it was warmed to the extent that it felt warm in about 5 minutes, and it was effective as a body warmer while maintaining an appropriate temperature for 10 hours or more.

Test Example Various disposable body warmers of the present invention shown in Table 1 were manufactured according to Example 1 and the following heat generation performance test was conducted. The results are also shown in Table 1. (1) Rise rate of heat generation Based on JIS S4100, the sheet surface with low air permeability was placed on the body side, and the time from the start of use until reaching 40 ° C was measured and evaluated according to the following criteria. ◯: 4 minutes or more and less than 10 minutes Δ: 10 minutes or more and less than 20 minutes X: 20 minutes or more (2) Maximum temperature The maximum temperature of the measured value was evaluated according to the following criteria. ◯: 70 ° C or less ×: Temperature exceeding 70 ° C (temperature unsuitable for JIS standard warmers) (3) Duration of heat generation Based on JIS S4100, measure the time to hold 40 ° C and use the following criteria. evaluated. ○: 10 hours or more ×: less than 10 hours

[0029]

[Table 1]

As a result of the test, the disposable body warmer of the present invention was
The rising speed of heat generation was fast, and the performance was satisfactory in terms of maximum temperature and heat generation duration. On the other hand, the conventional control product (Control 1) has a slow rising speed and does not meet the consumer's request, and also improves the exothermic composition, for example, when a reaction accelerator is blended (Control 2) and stored. A bag with evenly increased air permeability (Control 3), and 2 more
Even if it was made up of individual sachets and both were made into highly breathable storage bags (Control 4), serious problems occurred in terms of the maximum temperature and the duration of heat generation. Therefore, the usefulness of the disposable body warmer adopting the configuration of the present invention has been clarified.

[0031]

As described above in detail, the disposable body warmer of the present invention has a fast heat-up rising speed and sufficient performance in terms of the maximum temperature and the duration of heat generation, and is difficult to obtain conventionally. Since it has both of the above performances and has excellent usability, its practicality is extremely high.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a disposable body warmer according to the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the disposable body warmer according to the present invention.

[Explanation of symbols]

 1 Disposable body warmer 2 One-sided sheet 3 Other-sided sheet 4, 4'Band-shaped ventilation part 5 Polyethylene film sheet 6 Exothermic composition 7 Large area sachet 8 Small area sachet 9 Adhesive sheet for body attachment 10 Double-sided adhesive tape a Vent

Claims (5)

[Claims] 1. A disposable body warmer in which an exothermic composition containing iron powder, activated carbon, salts, a water-absorbent resin and water is enclosed in a breathable storage bag, and the disposable body warmer is composed of two sachets and each of the sachets is composed of two sachets. A disposable body warmer characterized by having large and small differences in breathability of the storage bag for the package. 2. The disposable body warmer according to claim 1, wherein a plastic film sheet is inserted between both sheets having different air permeability of the storage bag, and the two-layered package includes two plastic packages. 3. The plastic film sheet is a polyethylene film sheet, wherein the plastic film sheet is a polyethylene film sheet.
Disposable body warmer as described. 4. The disposable body warmer according to claim 1, wherein the disposable body warmer is composed of two separate packages that are connected to each other on the left and right sides and have different breathability of the storage bag. 5. The packing according to claim 1, wherein a packaging having a large area and a packaging having a larger air permeability of the storage bag and a smaller area than the packaging are stacked one above the other. A disposable body warmer.