JPH07194642A - Disposable portable body warmer - Google Patents

Abstract

PURPOSE:To provide a disposable portable body warmer of which the inner bag and the outer bag are integrated without aging and spoiling the touch, by sealing a heat generating composition in a containing bag made of plastic film with air pits and peelably adhering a non-permeable plastic film to cover the air pits. CONSTITUTION:A containing bag filled by a heat generating composition comprises a plastic film 2 of which one side is 3-layer laminate and has air pits 4 at the middle, and the other side is composed of separate paper 7, an adhesive layer 8 and polyethylene 2-layer laminated film 2 from the surface. The insides of the peripheral 4 edges of the containing bag are heat-sealed before a plastic film 3 is adhered on the bag to cover the air pits 4 to make a disposable portable body warmer. The heat generating agent 1 comprises iron powder, activated carbon, salts, a water absorption resin and water and contains n excipient. Thus, a disposable portable body warmer with excellent thermal properties and no aging in use is made with cost and product advantage by this method.

Description

Detailed Description of the Invention

[0001]

The present invention relates to iron powder, activated carbon, salts,
The present invention relates to a used body warmer in which a heat-generating composition containing a water-absorbent resin, water, etc. is enclosed in a storage bag.

[0002]

2. Description of the Related Art A heat-generating composition composed of iron powder, activated carbon, salts, water-absorbent resin, water, etc., generates heat simply by contacting with air without requiring ignition. The use-in-use body warmer that is enclosed in a storage bag (hereinafter, referred to as an inner bag) is widely used. Usually, the inner bag is stored by being stored in a substantially non-air-permeable plastic film bag for packaging (hereinafter referred to as the outer bag), and when used, the outer bag is torn and the inner bag is taken out for use. Be served. And, as an inner bag of a used body warmer, a bag material in which polyethylene or the like is laminated as a sealant on a non-woven fabric is provided with air permeability by opening a needle hole, or a so-called porous film having fine continuous pores on the surface and inside. It is general that the above is laminated on a non-woven fabric or the like.

However, in such a bag structure, since the thermal composition is double-packaged in the inner bag and the outer bag, the material cost is high and the manufacturing process is complicated. In some cases, the water in the heat-generating composition may evaporate into the space between the inner bag and the outer bag, and satisfactory temperature performance may not be obtained due to lack of water during use. If there are pinholes or scratches on the outer bag, an exothermic reaction will occur during storage, and the product value as a body warmer will be lost after use. There are problems such as.

In order to solve such a problem, for example, Japanese Utility Model Publication No. 58-31540 discloses an attempt to bond a non-moisture permeable gas barrier film to the uppermost surface of an inner bag made of a non-woven fabric. However, it has a problem that it is not sufficiently attached to the gas barrier film due to the unevenness of the surface of the non-woven fabric, and that the non-woven fabric becomes fluffy when peeled.

[0005]

DISCLOSURE OF THE INVENTION The present invention has an inner bag and an outer bag integrated with each other, which is advantageous in terms of cost and manufacturing, does not change with time during storage, and has a texture and a feeling during use. The purpose is to provide a Cairo that can be used without loss.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a heat-generating composition is enclosed in a plastic film storage bag provided with vent holes by perforation and the vent holes are covered. It relates to a body warmer in which a non-breathable plastic film is adhered and adhered in a peelable state.

The heat-generating composition used in the present invention is iron powder,
It is composed of activated carbon, salts, water absorbent resin, water, etc. Iron powder is a main component involved in the exothermic reaction of oxidation, and includes reduced iron, cast iron and the like, and powdery ones are generally used, but granular ones and fibrous ones may be mixed. 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, those having a high water-retaining ability and capable of keeping the whole in a free-flowing state are preferable in 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 hydrolyzed products of crosslinked polyacrylonitrile, but are not limited thereto. Of course, wood powder as a water retention agent,
A base material such as silica gel, perlite or vermiculite may be used in combination. The content of the water-absorbent resin is preferably in the range of 1.0 to 10% with respect to the total amount in consideration of the interaction with the below-mentioned excipient.

In the exothermic composition for a used body warmer of the present invention, it is preferable to further add an excipient. That is, the excipient is used during storage after manufacturing the body warmer, and during use of the body warmer, the affinity between each composition is strengthened and the movement is suppressed, and the contents are biased or the contents are discharged from the vents. It has the effect of preventing it from leaking out. As the excipient, starch-based excipients such as pregelatinized starch and dextrin, polysaccharide-based excipients such as sodium alginate and sodium caseinate, cellulose derivative-based excipients such as carboxymethyl cellulose, ethyl cellulose and hydroxypropyl cellulose , Polyvinyl alcohol-based, water-dispersed emulsion-based, and the like, but other than these may be used as long as they meet the purpose of the excipient.

The shaped filler is incorporated in an amount of 1.0 to 15%, preferably 3.0 to 10%, based on the total amount of the exothermic composition. If it is less than 1.0%, the effect of preventing biasing and leakage of the contents cannot be obtained, and if it exceeds 15%, the temperature performance is affected, which is not preferable.

In addition to the above-mentioned components, the exothermic composition of the present-in-use body warmer of the present invention includes a weak acid salt of an alkali metal, a weak acid salt of an alkaline earth metal, a hydrogen generation inhibitor such as metasilicate, an extender, Alternatively, substances such as zirconium and ceramics may be added as appropriate.

[0012] The used body warmer of the present invention is
A storage bag made of a plastic film having a ventilation hole is used, and a non-breathable plastic film is further adhered in a peelable manner so as to cover the ventilation hole. As the plastic film forming the storage bag, for example, various films such as OPP, CPP, polyethylene, nylon, polyester which may be moisture-proofed by polyvinylidene chloride or the like, and further aluminum foil or aluminum-deposited plastic film, etc. However, the present invention is not limited to these. Usually 10
One or two or more of the above-mentioned films having a thickness of 100 μ are used as a multilayer, and a sealant made of polyethylene or the like is generally laminated and used as an inner layer for imparting heat sealability. .

Since a single-use hand warmer loses its breathability on one side when it is worn on the body or clothes, it is not always necessary to form both sides of the storage bag with the same quality film as described above. Of course, the front and back surfaces may be configured. For example, it is effective to apply an adhesive to one side so that it does not fall off from the body or clothing while using the body warmer.Therefore, an adhesive layer is provided on the plastic film on one side, and the surface is separated so that it can be peeled off. If you stick a piece of paper, it's easy and convenient to use. Such an adhesive layer is made by treating an adhesive substance mainly composed of rubber, vinyl acetate, acrylic resin, etc., and transfers to an object such as clothes when used, or loosens fibers when peeled from the object. A non-transferable material is preferable so that it does not occur.

In the present invention, the breathability of the storage bag is obtained by perforating the plastic film. According to this method, the air permeability can be adjusted relatively easily by adjusting the size of the needle hole, and since the surface of the plastic film is smooth, it is necessary to further cover the air holes with the plastic film. Can be firmly adhered and pasted. On the other hand, if the storage bag is made of non-woven fabric, the surface is uneven and a gap is created between the bag and the gas-barrier film to be pasted on the bag, which causes a change over time in the exothermic composition proboscis and also causes the non-woven fabric to stand up when peeling. It is not preferable because it causes

As for the method of providing the ventilation hole, a method of providing it on the entire surface,
There are various methods such as a method of piercing the center of the storage bag in a concentrated manner and a method of endlessly providing it in the shape of a central belt of the storage bag, both of which are applicable, but considering the necessity of completely covering with a plastic film subsequently. Then, the centralized system is preferable. When the central vent is provided in a concentrated manner, especially in the conventional exothermic composition, leakage of the contents during use becomes a problem, but an excipient-blended composition suitable for use in the present invention is adopted. This will avoid this problem.

The material of the plastic film which is closely adhered so as to cover the ventilation hole is not particularly limited as long as it is non-permeable, and may be appropriately selected from the materials of the storage bag described above. This film is adhered to the storage bag in a peelable manner by means of an adhesive or the like, but it is preferable to provide a knob portion so that the film can be peeled off easily during use.

The thus-obtained disposable body warmer uses a storage bag in which an inner bag and an outer bag are integrated, which is advantageous in terms of cost and manufacturing, and has a conventional double packaging structure during storage. In comparison, the exothermic composition has the advantage that it is less susceptible to changes over time. Moreover, the temperature performance and the feeling of use are satisfactory, and there is no concern about leakage of the contents, so that comfortable warmth can be obtained.

Next, examples and test examples will be shown in order to explain the present invention in more detail, but the present invention is not limited thereto.

[0019]

[Example] Iron powder 20 g, activated carbon 2.5 g, sodium chloride 1.5 g, wood flour 3.5 g, sodium metasilicate 1.
0 g, water absorbent resin (isobutylene-maleic anhydride copolymer system) 1.0 g, pregelatinized starch 3 g, and water 10.5
The exothermic composition consisting of g was filled in the storage bag shown in FIGS. 1 and 2. That is, one surface is made of a plastic film 2 which is a three-layer laminate of a nylon film 40μ, vinylidene chloride 2μ, and polyethylene sealant 50μ from the surface layer, and a ventilation hole 4 is provided in the central portion, while the other surface is made from the surface layer to a separate paper 7 A storage bag composed of the pressure-sensitive adhesive layer 8 and the polyethylene two-layer laminated film (90 μ) 2 was used. The size of the storage bag is 10 x 13.5 cm (4 x 5 cm in the center with a vent), and the inside of the four sides is 0.8c.
After heat-sealing m, the plastic film 3 (having a size of 5 × 6 cm) is formed so as to cover the vent hole in the central portion.
Then, a vinylidene chloride-coated nylon film (50 μm) including the adhesive layer 9 and having the knob portion 5 at the tip) was adhered and adhered to obtain a cairo for use in the present invention. When the used body warmer was stored at room temperature for 1 year and the plastic film 3 was peeled off and used, no problem was found in humidity performance and no change with time during storage of the exothermic composition was observed. Also, during use, the contents did not leak from the ventilation holes, and a comfortable warmth could be obtained.

[0020]

[Test Example] The exothermic composition (A) used in the example or the exothermic composition (B) obtained by removing the gelatinized starch from the composition is used, and the storage bag is shown in Table 1 according to the example. A body warmer was created by using the material and shape. Manufacturing cost,
Changes over time during storage of the exothermic composition (moisture loss, etc.), temperature performance during use, usability (flickering on the surface of the storage bag, offset of contents, leakage from ventilation holes, etc.) ○, △ ，
When evaluated in three grades of x, it was as shown in Table 1.

[0021]

[Table 1]

As a result of the test, the performance of the body warmer according to the present invention was excellent. On the other hand, the conventional double-packed inner bag and outer bag type of Comparative Example 3 are high in cost, and there is a concern that they may change over time during storage. Further, in the case where the material of the storage bag is changed to non-woven fabric or paper, the ventilation holes are not completely covered, which causes a change with time of the heat-generating composition and causes fluffing during use, which is not preferable.

[0023]

According to the present invention, the inner bag and the outer bag are integrated,
(EN) A hand warmer that is cost effective, has an advantage in manufacturing, does not change over time during storage, and has excellent temperature performance and usability during use.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a used body warmer according to the present invention.

FIG. 2 is a sectional view thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Exothermic composition 2 ... Plastic film storage bag 3 ... Plastic film 4 ... Vent hole 5 ... Knob part 6 ... Seal part 7 ... Separate paper 8 ... Adhesive layer 9 ... Adhesive layer

Claims (3)

[Claims] 1. An exothermic composition is enclosed in a plastic film storage bag provided with ventilation holes by perforation, and
A body warmer comprising a non-breathable plastic film adhered in a peelable manner so as to cover the ventilation hole. 2. The body warmer according to claim 1, wherein the ventilation holes are centrally provided in a central portion of one surface of the storage bag. 3. The use warmer according to claim 1, wherein the heat-generating composition contains an iron powder, activated carbon, salts, a water-absorbent resin, water and the like, and an excipient.