JPH02131760A - Throwaway warmer for shoes - Google Patents

Abstract

PURPOSE:To adhesively set a warmer to a toe part, etc., and to limit the propagation of heat to the back of a sole at the time of exothermic reaction by fitting a film piece, to which an adhesive material is adhered, to a heat insulating material, for which bored holes are arranged, and charging an oxide heat generating compound between the film piece and a permeable film, which is adhered in a circumference side to this adhesive material adhering film piece. CONSTITUTION:On a heat insulating material 4, for which bored holes 5 are arranged, a film piece 2, to which an adhesive agent 3 is adhered, is fitted. Then, between the film piece 2 and a permeable film 1 to be adhered 6 in the circumference side to the film piece 2, an oxide heat generating compound 9 is charged. As the permeable film 1, the permeable film 1 is laminated to unwoven fabric and flexibility is obtained. As the heat generating compound 9, iron powder is defined as a main body and to this iron powder, water, water retentive agent and apro-oxidant, etc., are combined. In order to manufacture the warmer, a separation paper (not to be shown in a figure) is adhered to the adhesive agent 3 and the warmer in a condition that the heat insulating material 4 is not adhered is once produced. Then, the separation paper is removed from the warmer, which is obtained in such a way, and the heat insulating material 4 to have the bored holes 5 is adhered.

Description

[Detailed Description of the Invention] ``Object of the Invention'' The present invention relates to a disposable foot warmer, which enables the use of a disposable foot warmer in shoes and other footwear without the need for a special insole. The purpose of the present invention is to provide a disposable body warmer that can be used precisely at important parts that require heating at a relatively low cost.

(Industrial application field) A disposable warmer used for footwear such as shoes.

(Conventional technology) Disposable body warmers combine metal powder such as iron powder with a heating aid to achieve a warming effect by utilizing an oxidative exothermic reaction.They are the mainstream of today's body warmers and are widely used. I'm passing through. In addition, regarding the application of such disposable warmers to footwear such as shoes and suri-soba, for example, the Utility Model Publication No. 57-1
It was announced in publications such as No. 13307 (Jikko No. 58-8085) and is being adopted in various fields.

(Problem to be Solved by the Invention) However, in the conventional products as described above, when applied to the toe area of shoes, etc., the body warmer itself is a bag made of relatively flexible non-woven fabric, etc., in which a heat-generating material is housed. In addition, since it is necessary to obtain appropriate breathability even when used in almost sealed conditions such as inside shoes, special insole (with thick fiber structure etc.) is used. It is essential to use an insole (procured insole), and it is difficult to obtain an appropriate heat generating effect without using this insole. Such an insole is redundant and costly compared to the use of the disposable body warmer itself.

In addition, this insole gets dirty easily and needs to be replaced with a new one after repeated use, which increases the cost.Moreover, the insole must be taken out and removed each time a disposable body warmer is used. Therefore, there is a disadvantage that handling is complicated.

In particular, women are more likely than men to need warmers for cold feet, but women's shoes often do not have enough space to fit insoles with built-in disposable warmers like the ones mentioned above. Therefore, there are deficiencies that make it practically unusable.

Furthermore, in the cold season, the coldness of the feet is felt more strongly at the tip of the toe, so it should be applied to the tip of the shoe as much as possible. Since the adhesive edge on the circumferential side of the material storage bag and the adhesive edge on the circumferential side of the storage part in the insole are combined and positioned in the toe area of the shoe in multiple stages, the tip of the toe as described above This results in the formation of a region with a certain width in which no heat-generating material exists, which inevitably leads to insufficient heating at the vital part (the end of the toe). are doing.

"Structure of the Invention" (Means for Solving the Problems) A membrane piece with an adhesive bonded to it is attached to a heat insulating material provided with perforations, and a breathable film and a permeable film adhered on the circumferential side to this adhesive adhesive membrane piece are attached. A disposable hand warmer for footwear, characterized in that an oxidative exothermic composition is filled between the adhesive film piece and the adhesive film piece.

(Function) A form suitable for the inner surface of the bottom of shoes etc. is ensured by the insulation material such as foamed synthetic resin pieces.

The adhesive material bonded to the membrane piece is exposed through the perforation provided in the insulation material, and the exposed adhesive material is removed from the perforation of the insulation material as the wearer's weight on the footwear acts on the warmer. It protrudes and is positioned by adhering to the inner surface of the bottom of the footwear.

The above-mentioned positioning of the warmer is performed at an appropriate position, but by matching the shape of the front edge of the warmer to the toe part of the shoe, etc.
It is positioned with almost no gaps left, and since it is bonded with adhesive, the body warmer does not move even when walking.

The adhesive strength of the adhesive can be appropriately adjusted depending on the size of the perforation.

In general, 2 to 3 layers of insulation material is sufficient, and the overall thickness should be within 5 to 6 layers even when left unused, especially when the body weight is applied, both the insulation material and the heat generating material are compressed. It can be made quite thin, and since it is so thin and can be inserted directly into shoes without the need for an insole, it is suitable for use in women's shoes.

As mentioned above, since an insole is not required, it can be applied closely to the toe area inside the shoe, etc., and can effectively heat areas that really need a warming effect.

As mentioned above, since the exothermic composition is housed on the heat insulating material, the propagation of the exothermic composition to the sole of the shoe during the exothermic reaction is restricted, and the same and the same amount of the exothermic composition is produced compared to the case where no insulating material is used. This creates a high temperature state of several degrees Celsius to 8 degrees Celsius and achieves an efficient warming effect.

(Example) To explain a specific embodiment of the present invention as described above as shown in the attached drawings, as shown in FIGS. Take the membrane piece 2 to which the
The oxidative exothermic composition 9 is filled between the breathable film 1 and the breathable film 1, and the breathable film 1 can be made by laminating the breathable film 1 on a nonwoven fabric to obtain flexibility. However, it is also possible to use other methods such as a perforated structure in a fiber structure or a sheet formed by stretching or the like.

It should be noted that, as shown in the figure, the product of the present invention as described above is housed in a non-breathable packaging bag 7 and hermetically sealed when commercialized.

According to the present invention, as shown in FIGS. 3 and 4 as well as FIGS. 1 and 2, a hole 5 having a relatively large diameter and a fine hole 5a having a smaller diameter can be used in combination. The micropores 5a are made up of a series of several micropores 5a, and by removing the area surrounded by the plurality of micropores 5a, 5a, etc., the adhesive 3 will be removed when weight is applied as described above. It can be a large diameter opening (perforation) that protrudes and can be bonded to the inner surface of the footwear. However, this perforation 5a is of course not essential, and may of course not be used at all.

As is well known, the exothermic composition 9 is mainly composed of iron powder, which is mixed with water, a water retention agent, an oxidation promoter, etc. Specifically, it is composed of iron powder, an appropriate amount of water, wood powder, activated carbon, vermiculite, etc. , common salt, etc. are used, and the exothermic temperature due to oxidation is adjusted to, for example, a maximum of 42 to 43°C, with an average temperature of 38°C.

As for the adhesive 3, as mentioned above, it is natural that it is not preferable to stain the inner surface by adhering it to the inner surface of shoes, etc., and in order to avoid such disadvantages, a non-transferable adhesive is used. 3, and as the non-transferable adhesive layer 3, an organic solvent type adhesive such as a rubber type, acrylic type, or vinyl acetate type, or an aqueous type adhesive is used, and a reactive functional group is introduced into this. For example, 1 to 1 functional monomer is added to an acrylic heptanomer.
Adopt one containing 0% by weight. Examples of the functional monomer include those containing 1 to 4% by weight of the following general 2.

H Pi+Ih Rz (However, in the formula, P represents a lower alkyl group having 1 to 4 carbon atoms, and Rt represents a hydrogen atom or a methylol group.) To specifically manufacture the hand warmer according to the present invention as described above, First, a body warmer is manufactured in which a release paper (not shown) is adhered to the adhesive 3 and the heat insulating material 4 is not adhered.
It is suitable for manufacturing the product of the present invention using general disposable warmer manufacturing equipment to remove the release paper of the product thus obtained and then adhere the heat insulating material 4 having the perforations 5 to the product. In other words, it is not easy to sequentially adhere and form the heat seals on the heat insulating material 4, and it is especially difficult to accurately form a heat seal on the circumferential side.The above method makes it possible to obtain an accurate product.

As for the overall shape of the body warmer, as shown in Figures 1 to 4 above, it is sufficient that it is located only in the front half of the footwear, especially in the toe area. The adhesive of the present invention, in which the adhesive is made to protrude from the perforation 5 by utilizing the weight of the footwear, and thereby adheres to the inner surface of the footwear as described above, can be stably fixed in any position. It does not need to be large enough to cover the entire inner surface of the footwear. However, if the wearer wants a thermal effect on the heel of the foot, it may be targeted at the rear heel, and in some cases, it may be targeted at the toe and heel.
It can also be used as a body. In any case, by forming such a small body, the cost can be reduced and the body can be made relatively thin.

In the case of shoes as the applicable footwear, the temperature conditions due to heat generation are as mentioned above, the maximum temperature is 42 to 43 degrees Celsius, and the average temperature is about 38 degrees Celsius, and such temperature conditions are generally known. It can be easily obtained using a heat-generating composition mainly made of iron powder for disposable hand warmers. The adhesion to the inner sole of the footwear becomes stable after walking for at least a few steps.In other words, when the footwear is put on to wear the footwear, it can be properly positioned at the toe area, and by walking in this state, the bonding becomes stable. A stable fixation state can be achieved.

"Effects of the Invention" According to the present invention as described above, it is possible to provide a disposable body warmer that can be stably used as footwear without requiring an insole or similar auxiliary device. It is easy to use and handle, and it is low cost.Furthermore, since it can be used as a stand-alone warmer, it is thin, making it suitable for use in women's shoes, and it can also be used close to the toe area of shoes. As a result, it achieves special effects that cannot be obtained with conventional disposable foot warmers of this type, such as effectively heating the parts that really need heating, so its effects are industrially significant. is a great invention of

[Brief explanation of the drawing]

The drawings show the technical contents of the present invention, and FIG. 1 is a partially cutaway plan view showing one embodiment of the present invention, FIG. 2 is a partially cutaway bottom view thereof, and FIG. 3 is a partially cutaway plan view showing one embodiment of the present invention. FIG. 4 is a bottom view, FIG. 5 is a cross-sectional view, and FIG. 6 is a cross-sectional view of another embodiment in a bonded state when pressed. However, in these drawings, 1 is a breathable film, and 2 is a breathable film.
is a membrane piece, 3 is its adhesive, 4 is a heat insulator, 5 is a perforation, 5a
6 is a peripheral adhesive part, 7 is a non-breathable packaging bag, 8 is a micropore,
9 indicates the hermetic seal, and 9 indicates the exothermic composition.

Claims (4)

[Claims] 1. A membrane piece with an adhesive bonded to it is attached to the heat insulating material provided with perforations, and an oxidative exothermic composition is placed between the breathable film adhered to the circumferential side of the adhesive membrane piece and the adhesive adhesive membrane piece. A disposable hand warmer for footwear characterized by being filled with. 2. A disposable warmer for footwear according to claim 1, wherein the heat insulating material provides expandability or shapeability to the inner surface of the footwear. 3. 2. The disposable foot warmer according to claim 1, wherein the adhesive material is adhered to and positioned on the inner surface of the footwear by using the wearer's weight through the perforations in the heat insulating material. 4. 4. The disposable foot warmer according to claim 3, wherein the degree of adhesion and non-slip on the inner surface of the footwear is adjusted by adjusting the size of the perforations in the heat insulating material.