JP2000288008A - Disposable body warmer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance bendability and to adapt a disposable body warmer to respective part of a human body, such as a bending part in shoulders, arms, the neck or legs with excellent follow-up deformation property by independently storing air permeable heat generation bodies in two or more division chambers which are formed by means of partitioning the inside of an air permeable storing bag. SOLUTION: A disposable body warmer is provided with the air permeable storing bag 1 and the air permeable heat generation bodies 2 are independently stored in two or more chambers 14 which are formed by partitions 12 and 13 in the storing bag 1. The number of the division chambers 14 is made to be the proper one being two or more based on the size or the like of the disposable body warmer. It is advantageous that the number of the chambers are increased and sections are made to be small on a point in follow-up deformation property by bending in a bending part or the mitigation of a strange feeling in fitting or the like and ten or more chambers can be available. But the number is made to be equal to or less than nine, particularly, three to six based on the size being about a 10 cm square by considering a heat generation continuing time or the like based on a heat generation body storing amount in the chambers 14. It is favorable to use a material obtained by laminating a fiber assemblage base material, particularly nonwoven fabrics and porous film with an air permeable adhesive layer as the air permeable material.

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 which is excellent in mounting to various parts of a human body.

[0002]

2. Description of the Related Art A disposable body warmer in which a heat-generating heat-generating body is housed in a gas-permeable housing bag has become widespread, and those having an adhesive layer which can be adhered to and held on clothing and the ground have been widely used. ing. Conventionally, as such a disposable body warmer, a single-package type in which a heating element is housed in a single room has been known exclusively.

However, with the dispersal of disposable body warmers intended for application to various parts of the human body such as shoulders, arms, necks and feet, in a single package form, for example, it is difficult to hold the adhesive, and it easily falls off or is worn. Had a problem of causing a strong sense of incongruity. Such a problem is further promoted by a decrease in flexibility due to agglomeration of the heating element as the reaction proceeds. Further, there is also a problem that the stretched film forming the storage bag shrinks and curls due to heat generation, and the end portion of the single package is rolled up.

[0004]

SUMMARY OF THE INVENTION The present invention is intended to maintain the adhesiveness even when the heat generating element having ventilation and heat is agglomerated due to the reaction and the flexibility is reduced. Development of a disposable body warmer that maintains good condition, does not easily fall off, has excellent flexibility and can be applied to various parts of the human body such as shoulders, arms, neck, feet, etc. with good deformability and does not easily cause discomfort As an issue.

[0005]

According to the present invention, there is provided a disposable body warmer in which a heat generating body having ventilation and heat is divided into two or more compartments formed by partitioning the inside of a gas permeable storage bag. Things.

[0006]

According to the present invention, the heating element can be freely bent through the partition between the dispensers by forming the double package by dispensing the dispenser, and various parts of the human body including curved parts such as shoulders, arms, necks and feet. It can be applied to a fingertip or a toe, etc., and can be applied to a fingertip or a toe, etc. A disposable body warmer can be obtained in which the adhesion holding state via the pressure-sensitive adhesive layer can be maintained satisfactorily even if it is rolled up, falling off can be prevented, and uneven distribution of the heating element due to curling or own weight can be prevented.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A disposable body warmer according to the present invention has a ventilation heat-generating heating element divided into two or more compartments formed by partitioning the inside of a breathable storage bag. Figure 1 shows an example
(A) and (b). 1 is a storage bag;
3 is a partition, 14 is a compartment, and 2 is a heating element. 1
Reference numeral 1 denotes a sealing portion at the periphery of the storage bag, 15 denotes a cutting line that can be cut by hand, 16 and 17 denote base materials forming the storage bag, 18 denotes an adhesive layer, and 19 denotes a separator.

[0008] The number of compartments formed by the partitions can be an appropriate number of two or more compartments based on the size of the disposable body warmer and the like. It is advantageous to increase the number of chambers to make the compartment smaller than the point of following deformability to a curved portion having a small radius of curvature due to bending or to alleviate the feeling of discomfort due to the bending, and it is generally possible to use 10 or more rooms. In consideration of the duration of heat generation based on the heating element capacity in the branch room, the size is set to 9 or less, especially 3 to 6 rooms based on a size of about 10 cm square.

In the present invention, it is also possible to form a plurality of the above-described compartments in series so as to be able to cut into an appropriate size according to the purpose of use such as a place to be applied to the human body. In this case, the size of the disposable body warmer can be appropriately set, and the number of the divided rooms can be set to an appropriate number, and it can be a continuous body of 20 rooms or more. Further, the partition can be formed in any direction such as a vertical or horizontal direction, a vertical and horizontal direction, an oblique direction, and the like.

[0010] The disposable body warmer according to the present invention is formed in the same manner as the conventional disposable warmer except that the heat-generating body having ventilation and heat is divided into two or more compartments formed by partitioning the inside of the above-mentioned breathable storage bag. Can be. Accordingly, the storage bag is not particularly limited as long as it is formed by using a base material having air permeability in whole or in part. The general thickness of the air-permeable substrate is 500 μm or less, preferably 20 to 400 μm, particularly 100 to 3 μm.
00 μm, but is not limited to this.

Incidentally, examples of the air-permeable base material include a gas-permeable film made porous by an appropriate method such as a stretching treatment and a perforation treatment, and a fiber-assembled base material such as a nonwoven fabric or a woven fabric made of various fibers. . The air-permeable base material that can be preferably used from the viewpoints of air-permeability, strength, adhesive treatment property and the like is obtained by laminating a fiber-assembled base material, in particular, a nonwoven fabric and a porous film via a gas-permeable adhesive layer. An example is shown in FIG. Reference numeral 3 denotes a gas-permeable base material, 31 denotes a fiber assembly base material, 32 denotes a gas-permeable adhesive layer, and 33 denotes a porous film.

As the fiber-assembled base material, a suitable air-permeable material such as a nonwoven fabric or a woven fabric made of various fibers such as polyamide, polyester, polypropylene and rayon can be used. There is no limitation. By using the fiber-assembled base material, a base material having excellent thinness, strength, and air permeability can be obtained, and a fiber-assembled base material that can be preferably used from this point is a nonwoven fabric having a basis weight of 10 to 100 g / m ² .

The porous film may be made of, for example, polyethylene, especially, polyolefin resin such as linear low-density polyethylene or polypropylene, or fluorine-based resin such as polytetrafluoroethylene, or an inorganic filler such as calcium carbonate. A film having a diameter of 30 μm or less can be blended and formed into a film by an appropriate method such as an extrusion method.A suitable film such as a porous film obtained by stretching the film in a uniaxial or biaxial manner can be used. There is no limitation. The porous film that can be preferably used from the viewpoint of air permeability and the like is 0.1 to 1
Having an average pore diameter of 0 μm and a moisture permeability of 100 to 2000 g
/ M ² · day.

On the other hand, the above-mentioned air-permeable adhesive layer for laminating the fiber-assembled base material and the porous film is an appropriate air-permeable adhesive layer such as an adhesive layer for pattern coating or a hot-melt type porous adhesive film. It can be formed of an adhesive layer.
Less unevenness in air permeability and adhesive strength due to fineness and uniform distribution of pores, etc. Adhesion treatment via an adhesive layer is preferred.

The formation of the air-permeable adhesive layer is performed by, for example, converting the adhesive substance into a fiber by an appropriate method such as a curtain spray method, a melt blow method, or a slot spray method in which the adhesive substance is sprayed through hot air while being melted by heating. The adhesive substance is fiberized by an appropriate method, such as a method in which the adhesive substance is spread and deposited on an appropriate supporting substrate made of a porous film, a breathable substrate, a separator, etc. Can be performed by an appropriate method.

The air-permeable adhesive layer, which is preferable from the viewpoint of the balance between the adhesive force and the air permeability, has an average diameter of the fibers forming the adhesive layer of 0.1 μm to 1 mm, preferably 0.5 μm to 100 μm, and more preferably 1 μm to 100 μm.
５０50 μm, and the fiber having such an average diameter has a basis weight of 100 g.
/ M ² or less, especially 1 to 30 g / m ² , particularly ^{2 to} 10 g / m ²
It is deposited on a nonwoven fabric, entangled fibrous, or spider web porous structure at a rate of m ² .

As the adhesive substance for forming the fiber, for example, a hot-melt type adhesive or adhesive such as hot-melt type adhesive or adhesive can be used at room temperature or at the time of heat-melting or at the time of fiberization of the heat-melted material. Or an appropriate one such as one showing adhesiveness by reheating the formed fiber. Incidentally, specific examples thereof include styrene-based elastomers such as SIS and SBS, SEBS and SIPS, polyethylene, especially ultra-low-density polyethylene and polypropylene, olefin-based polymers such as ethylene-vinyl acetate copolymer, and acrylic acid and methacrylic acid. Examples include acrylic polymers containing alkyl esters as components, and thermoplastic resins such as polyester-based, polyamide-based, and urethane-based resins.

The laminate is formed, for example, by forming a gas-permeable adhesive layer on a porous film and / or a fiber-assembled base material and laminating them, or by forming a gas-permeable adhesive layer formed on a separator with a porous film or And / or an appropriate method such as a method of transferring to the bonding surface of the fiber assembly base material and laminating via the transfer layer. In addition, on the bonding surface of the porous film or the fiber
Appropriate treatments such as corona treatment, plasma treatment, sputter etching treatment, and anchor treatment with a primer or the like can be performed as necessary for the purpose of improving the adhesive strength.

A storage bag which can be preferably used for forming a disposable body warmer which can be adhered to and held on clothing, the ground, etc. is made of a bag-like adhesive body of a breathable base material 16 and an adhesive sheet 17 as exemplified in FIG. 1 (b). Things. As the pressure-sensitive adhesive sheet, an appropriate pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer 18 on one side of a base sheet 17 as shown in the drawing can be used. Incidentally, a polymer film or a laminate thereof is generally used as the base sheet. The base sheet may or may not have air permeability.

The substrate sheet which can be preferably used in view of the partitioning formability and the like is formed of a film having a good heat-sealing property on an adhesive surface with a breathable substrate for forming a storage bag, and a back surface with an adhesive layer. It is made of a film having good adhesiveness. Examples thereof include a film having a good heat-sealing property such as an ethylene-vinyl acetate copolymer as an adhesive surface, and laminating two to five layers of a film made of a suitable polymer such as polyethylene, or a heat-sealing nonwoven fabric. Laminated films having good properties can be used.

The adhesive layer for holding the adhesive provided on one side of the base sheet may be placed at an appropriate position on the entire surface of the base sheet or a part thereof, for example, a portion excluding a partition portion, according to a desired adhesive holding force or the like. Can be provided with an appropriate area. The thickness of the pressure-sensitive adhesive layer is appropriately determined according to the type of the pressure-sensitive adhesive, the set adhesive strength, the desired adhesive holding property of the warmer, and the like. The general thickness of the pressure-sensitive adhesive sheet is 10 to 800 μm.
m, but is not limited to this.

The formation of the pressure-sensitive adhesive layer is carried out by an appropriate method such as a method of directly applying an adhesive on a base material sheet, or a method of providing an adhesive on a separator and adhering and transferring it to the base material sheet. be able to. The application of the adhesive layer can be performed using an appropriate coating machine such as a gravure method or a screen printing method. An appropriate adhesive such as acrylic or rubber-based, especially styrene block copolymer-based adhesive, can be used, but it has an adhesive strength enough to damage clothing etc. when peeling off a disposable body warmer that has been held. Is not preferred.

Normally, the adhesive holding type disposable body warmer is in a state in which the adhesive layer 18 is temporarily covered with a separator 19 as shown in FIG. The separator is not particularly limited, and an appropriate separator may be used. Incidentally, examples thereof include those obtained by subjecting a thin leaf composed of a film or polyethylene laminated paper from a general-purpose plastic such as polyester to a surface treatment with an appropriate release agent such as a silicone-based, long-chain alkyl-based or fluorine-based material. The separator may be subjected to printing such as a method for using a warmer, if necessary.

Antibacterial agents can be added to each of the layers forming the storage bag, such as the air-permeable base material and the pressure-sensitive adhesive sheet, for the purpose of improving hygiene by antibacterial action. Also, since the heat-generating body having ventilation and heat is a colored material such as black, the formation layer of the base material forming the storage bag is colored by an appropriate method such as a colorant compounding method for the purpose of shielding the color. Can also.

The storage bag and the partitioning thereof are in accordance with the conventional method such as a method of forming the bag body by joining the ends and the partitioning portions of the base material by an appropriate method such as an adhesive, sewing, or a heat sealing method. The disposable body warmer according to the present invention may be formed by an appropriate joining method, as long as it has a gas-permeable portion in at least a part of each partitioned compartment in the storage bag. Therefore, the air-permeable portion can be an appropriate portion such as the entire surface or one surface of the storage bag, or a part thereof.

A preferred method for producing a disposable body warmer is to use, for example, a long-sized base material and a rotary heating / compressing device capable of heat-sealing a target partition portion and a peripheral edge of the base material.
Heat-sealing the necessary portions of the edge and the partitioning portion of the long base material opposed to each other via the heat-pressing device, and supplying the heat-generating heating element to the compartment formed by the gap between the formed base materials. There is a continuous forming method in which the enclosing process is performed and the formation of the next compartment is started while bonding the ends of the heating device in the enclosing process.

In the above, the width of the heat seal band of the periphery or the partition of the base material forming the storage bag such as a breathable base material or a pressure-sensitive adhesive sheet can be appropriately determined.
In the following, it is particularly 1 to 30 mm, particularly 3 to 20 mm, and the partition line can be provided with a cutting line which can be cut by hand such as a perforation as needed. The purpose of such a cutting line is to form a disposable body warmer having a size corresponding to the application location of the human body and the like, and to improve the flexibility.

The disposable body warmer thus formed is sealed in an outer bag and shut off from the outside air until it is put to practical use, and measures are taken to prevent the exothermic reaction from proceeding. A notch such as a spine split may be provided on the separator for temporarily covering the adhesive layer so that the separator can be easily peeled off.

The heat-generating heat-generating body to be accommodated in the storage bag is based on the air permeability of the storage bag made of, for example, metal powder such as iron, water, a water retention agent such as salts or activated carbon, or an oxidation promoter. An appropriate element such as one that generates heat upon contact with oxygen (air) taken in can be used, and any of the heating elements in a conventional disposable body warmer can be used. The amount of the heating element to be enclosed is appropriately determined depending on the maximum heat generation temperature, the time during which the temperature is to be maintained, and the like.

The disposable body warmer can also contain a magnetic substance such as a magnet for the purpose of improving blood circulation and stiff shoulders by a magnetic effect. In that case, it is preferable that the magnetic substance be accommodated in at least one of the compartments.

[0031]

EXAMPLE 1 A polyamide hot melt adhesive melted at 180 ° C. in an applicator tank was formed into fibers by curtain spraying, spread and deposited on a polyamide nonwoven fabric having a basis weight of 40 g / m ² , and the basis weight was adjusted. A permeable substrate formed by laminating a porous film on a nonwoven fabric-like permeable adhesive layer of 7 g / m ² , and a 30 μm-thick olefin-based film provided on one side of a separator. A pressure-sensitive adhesive sheet having a SIS-based hot-melt pressure-sensitive adhesive layer bonded together with a separator is heat-sealed while a predetermined amount of a heat-generating heat-generating element is interposed between the pressure-sensitive adhesive sheets, and the portion is perforated to form five vertical rows and five horizontal rows 120mm long, 1 horizontal with 15 rows of 3 compartments
A 00 mm disposable body warmer was obtained.

In the above, the average fiber diameter in the air-permeable adhesive layer was about 10 μm. The porous film is formed by extruding a mixture of 100 parts by weight of linear low-density polyethylene and 120 parts by weight of calcium carbonate on the same production line to form a film, which is uniaxially stretched four times and laminated. The average pore diameter was 0.5 μm and the moisture permeability was 600 g / m ² · day.

Comparative Example A disposable body warmer in the form of a single package having a length of 120 mm and a width of 100 mm was obtained in the same manner as in Example 1 except that no compartment was formed by a partition. No perforations were provided.

Evaluation Test The practicality of the disposable body warmers obtained in the examples and comparative examples was evaluated on a scale of 1 to 5, with 5 being the best. The results are shown in the following table. Curved surface fit Difficult curl Usability Comprehensive evaluation Example 1 5 4 5 5 Comparative example 2 2 3 3

[Brief description of the drawings]

FIG. 1 is an explanatory view of an embodiment.

FIG. 2 is a cross-sectional view of an example of a breathable base material.

[Explanation of Signs] 1: Storage bag 11: Peripheral seal portion 12, 13: Partition 14: Separation room 15: Cutting line that can be cut by hand 16, 17: Base material 18: Adhesive layer 19: Separator 2: Ventilation heat generation Body 3: Air-permeable base material 31: Fiber-assembled base material 32: Air-permeable adhesive layer 33: Porous film

Claims (4)

[Claims] 1. A disposable body warmer in which a ventilation heat-generating heating element is divided into two or more compartments formed by partitioning the inside of a breathable storage bag. 2. The storage bag according to claim 1, wherein the storage bag comprises a bag-like adhesive body of a pressure-sensitive adhesive sheet and a gas-permeable base material obtained by laminating a nonwoven fabric on a porous film. A disposable body warmer consisting of a seal band. 3. The method according to claim 1, wherein at least one of
A disposable body warmer that contains magnetic material in the room. 4. The disposable body warmer according to claim 1, wherein the partitioning portion is provided with a cutting line that can be cut by hand.