JPH02172460A - Throwaway body warmer for footwear such as shoe - Google Patents

Abstract

PURPOSE:To improve the heating effect by putting in a heating agent to a flat ventilating bag body with the form responding to a partial form of a foot, forming a non-turnover adhesive layer at one side of the ventilating bag body, and contacting the bag body to the surface of the foot through the non-turnover adhesive layer. CONSTITUTION:One side of a flat bag 1 is made as a ventilating surface, while the other side of the flat bag 1 is made as a contact surface where a non- turnover adhesive layer 3 is formed. In such a flat bag 1, a heating agent 2 to which a reaction asistant agent mainly of iron powder is mixed is enclosed in about an even flat-form with the thickness 2-5mm, and the peripheral sides are sealed 9. To the flat bag 1 of the heating agent, a removing paper 4 is attached to the non-turnover adhesive layer 3, and it is housed in a non- ventilating packing bag 5, whose peripheral sides are sealed up 6. In this case, such a flat bag 1 is preferably made of a material getting well to fit the foot 8 or the sock 7.

Description

[Detailed Description of the Invention] ``Object of the Invention'' The present invention relates to a disposable warmer for footwear, which is equipped with a disposable warmer inside the footwear such as shoes or slippers, and has different dimensions to provide an appropriate warming effect. It is an object of the present invention to provide a disposable body warmer that can be substantially effectively adapted to any kind of footwear, and can be used at low cost and easily.

(Industrial field of use) A disposable warmer for shoes and other footwear that utilizes a chemical exothermic reaction.

(Prior Art) Disposable body warmers that utilize the oxidation reaction of iron powder are widely used today, and some proposals have been made regarding the application of these disposable body warmers to footwear such as shoes and slippers.

For example, in Japanese Utility Model Application Publication No. 61-8013, a housing section for the above-mentioned disposable body warmer is formed in the insole used in shoes, and a pyrogenic substance contained in a breathable bag is set in the housing section. It is generally thought that.

Furthermore, in Japanese Patent No. 4249319, it is announced that a housing section for a disposable body warmer as described above is formed on the upper surface of slipper-like footwear to provide a warming effect to the toes of the wearer from the upper surface. .

(Problems to be Solved by the Invention) In the above-mentioned conventional insole that stores a disposable body warmer by forming an accommodating portion on the insole itself, the insole covers the entire sole of footwear such as shoes, so there is a considerable problem with the insole itself. It has a large size and inevitably has to be expensive. Furthermore, footwear such as shoes come in various sizes because they are tailored to the size of the feet of each wearer, and insoles of various sizes are prepared to accommodate the different sizes of shoes. This makes manufacturing complicated, making it difficult to manage the product during the storage and distribution process, and requiring unnecessary space, which also inevitably increases costs.

Although the device according to the above-mentioned US patent specification does not require such an insole and therefore does not have these disadvantages, in this case, a disposable warmer is attached to the inner upper surface of the footwear, and its warming effect is generally There is a strong tendency for the heat to be propagated upwards, and since there is a certain amount of space between the upper inner surface of the footwear and the surface of the foot, the warm air is dispersed without having much of a warming effect on the feet. There is a strong tendency to Furthermore, even if there is no need to manufacture a separate part from the footwear, such as an insole, the two disposable warmer storage units are always kept with the footwear, so when wearing the footwear in summer or warm seasons, The housing section obstructs loading/unloading operations. Furthermore, the above-mentioned body warmer accommodating part accommodates the entire instep and also accommodates the heel of the foot.In general shoes, it is extremely difficult to attach and remove the disposable body warmer, and it is practically impossible to use such a body warmer. Furthermore, footwear having a body warmer accommodating portion as described above requires a lot of man-hours to manufacture and is inevitably expensive.

Furthermore, the warming effect required by the wearer of footwear such as the above-mentioned shoes varies considerably depending on the constitution or preference of each wearer and the external temperature conditions, and especially when the wearer starts using the footwear after setting it inside the shoe. If excessive or insufficient temperature is detected later, it is necessary to discard the previously unsealed product and replace it with a new one with a different heat generation effect, resulting in waste and double costs. I need.

Furthermore, although the parts most in need of a warming effect are the ends, such as the toes and heels, it is not possible to accurately insert disposable body warmers into these ends.

Furthermore, it is exclusively used for shoes or slippers, and cannot be used for outdoor jikatabi, indoor tabi, or the like.

"Structure of the Invention" (Means for Solving Problems) A heat-generating agent is housed in a flat air-permeable bag having a shape corresponding to the partial shape of the foot, and is non-transferable to one side of the air-permeable bag. 1. A disposable body warmer for footwear such as shoes, characterized in that a non-transferable adhesive layer is attached to the surface of the foot.

(Function) The breathable bag that conforms to the partial shape of the foot is adhered to the foot or the socks or tabi that cover the foot by means of a non-stick adhesive layer formed on one side of the bag.

As mentioned above, the exothermic agent inside the breathable bag attached to the foot or the socks covering the foot generates heat due to the oxygen (air) supplied through the breathable bag, causing a warm temperature to the bonded part of the foot. give effect.

As mentioned above, the feet to which the heat-generating agent-containing breathable bags are attached directly or through socks can be inserted into footwear such as bags, slippers, tabi socks, etc., and even when walking as appropriate, the feet will not be affected by the above-mentioned non-stick adhesive layer. It is held in a predetermined set position, and the warming effect generated by its heat generation is maintained.

Due to the internal cohesive force of the non-stick adhesive layer, which is enhanced by its reactive functional groups, there is virtually no residual adhesion on the foot surface or sock surface when peeled off after adhesion. Avoid staining feet, socks, etc. As mentioned above, footwear such as shoes that are attached to the feet with a heat-generating agent-containing breathable bag attached thereto covers the foot and also covers the heat-generating agent-containing breathable bag to prevent the heat-generating agent from being released. Improves warming effect and lengthens heat generation time. The non-adhesive adhesive layer is used only to hold the above-mentioned heat-generating agent-containing breathable bag at a predetermined location on the foot surface within the footwear, so a light adhesive force is sufficient, and there is no need to use it all over the place. Targeted or partial layering is acceptable, and when forming solidly, a light adhesive force is sufficient. This also prevents adhesion and staining when removed from feet, socks, etc.

By using a suitably long air-permeable bag, the bag can be continuously covered and bonded from the front to the back of the toe, or from the bottom to the side of the heel, providing a stable thermal effect.

(Example) To explain the concrete implementation and embodiment of the invention as described above, which is shown in the attached drawings, the mass-produced concrete embodiment is as shown in Fig. 1.2, One side of the flat bag 1 is used as a ventilation surface 1a, and the other side of the flat bag 1 is layered with a non-transferable adhesive layer 3 as an adhesive surface. However, in such a flat bag 1, as is known, the exothermic agent 2, which is mainly made of iron powder and contains a reaction aid, is placed in a thickness of 2 to 5 mm.
It is charged in a substantially uniform flat shape of 1 m, and the peripheral side is sealed 9.

In order to concretely commercialize the flat bag 1 containing a heating agent as described above, a release paper 4 is adhered to the non-transferable adhesive layer 3, and this is packaged in a known non-breathable packaging. It is assumed that it is housed in a bag 5 and the circumferential side is hermetically sealed 6.

As is well known, the exothermic agent 2 is mainly composed of iron powder, mixed with water, water retaining materials (charcoal, vermiculite, etc.), oxidation promoters such as activated carbon, and salt. - Iron powder around t% and 18-25wt%
water, 7-11 wt% water retention agent, 3.5-4.5 wt%
activated carbon, about 2 to 5.0 wt% of common salt, etc., and the exothermic temperature due to oxidation is adjusted to a maximum of 52°C, preferably 40 to 50°C, and an average temperature of 35 to 45°C. It is.

The size of the flat bag 1 is determined according to the partial shape of the foot (i.e., covers the whole from the big toe to the little toe, or covers the little toe), and the length is 5.0 to 15 cI11.
Any width can be used within the range of about 3 to 10 cm. Alternatively, it may be a rectangular flat bag with one side measuring 6 to 15c+++. As shown in FIG. 5 or FIG. 7, such a flat bag 1 is preferably one that has good conformability to the foot 8 or socks 7, and for this purpose polyurethane, polypropylene, polyethylene, or modified versions thereof are preferably used. There are flexible thermoplastic sheets or films such as hard plastic or rubber, and non-woven fabrics are also used. A flat bag like this
The air permeability of the air permeable surface 1a can be restricted as appropriate, and a method for restricting this air permeability is to use a sheet or film as described above in which fine continuous pores are formed; Or the film is subjected to appropriate heat-sealing treatment to form a breathable uniform. For example, the air permeability of the sheet or film having uniform continuous pores of 1 to 50 .mu.m is restricted by uniformly dispersing or applying a moderately heated thermal adhesive over the sheet or film.

Furthermore, even if a resin film with fine ventilation holes is laminated onto a known non-woven fabric, the air permeability will be moderately restricted.
Moreover, a flexible ventilation surface 1a can be obtained.

The degree of pressure reduction when the exothermic agent 2 charged into the flat bag 1 generates heat due to oxidation by the above method is appropriately selected in consideration of the mass of the exothermic agent 2 charged. For example, if the air permeability is 800~ 1500 seconds/100cc (JISP 81
17) It has been experimentally confirmed that an appropriate negative pressure state can be created by using the bag 1 described above, and the amount of water within the above range is 22 wt% or less, which is 24 to 2
By limiting the amount to less than 5 wt%, the bag 1 is always compressed at atmospheric pressure from the beginning under the condition that the exothermic agent 2 starts to generate heat. In addition, by reducing the amount of water mixed into the heat generating agent based on iron powder as mentioned above, and adding 9wt% or more of a water retaining material such as wood flour or vermiculite, shrinkage due to oxidative heat generation is prevented and shrinkage is reduced. Prevent the solidification of the exothermic agent that caused the problem. In addition, by setting the upper limit of such a water-retaining material to 11-t%, the amount of the main material iron powder, heat generation accelerator, salt, etc. can be appropriately obtained, and the heat generated by the heat generating agent as a whole can be maintained in an appropriate state as a body warmer. do. As mentioned above, if the amount of water retaining material is set high within the above range and the amount of mixed water is reduced to prevent the exothermic agent from solidifying, the solidified exothermic agent will not cause discomfort or damage to the bonded feet. , comfortable to use. Moreover, the upper limit of the amount of water mixed (at 18wt% or more) is 22
By limiting the content to wt% or less, the rise of heat generation is improved, and a favorable warming effect can be obtained from the initial stage of use.

The surface to which the non-transferable adhesive layer 3 is attached may essentially be non-air permeable since the adhesive N3 inhibits air permeability, but in order to ensure flexibility etc. A material made of a flexible sheet or a non-woven fabric such as those described above is used, and the adhesive layer 3 is layered thereon.

As the non-transferable adhesive layer 3, an organic solvent-based adhesive such as a rubber-based, acrylic-based, or vinyl acetate-based adhesive, or a water-based adhesive is used, and a reactive functional group is introduced into this to increase the internal cohesive force. For example, a mixture of 1 to 10% and 1t% of functional heptamers to the acrylic monomer is used. As the functional monomer, one having the following general formula I is added in an amount of 1 to 4 t%.

(However, in the formula, R represents a lower alkyl group having 1 to 4 carbon atoms, and R1 represents a hydrogen atom or a methylol group.) Alternatively, 6 to 10-t% of the compound according to the following general formula (where R is a hydrogen atom or a methyl group, Rt is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, or an allyl group, and R3 is a
It represents an alkyl group having 1 to 18 carbon atoms. ) Furthermore, 1 to 8% by weight of a functional monomer according to the following general 2)
There are those in which 1 to 5% by weight of a water-soluble or dispersible epoxy compound is added to the adhesive, and all of these non-transferable adhesives are known.

(However, in the formula, R represents a hydrogen atom or a methyl group.

R2 and R3 represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. ) The breathable and flat bag 1 according to the present invention has one side shaped like a toe or heel as shown in Fig. 3.4 instead of a rectangular bag as shown in Fig. 1.2. A matching circular arc or curved edge portion 1e may be adopted. That is, by forming such an arcuate or curved end edge 1e on one side, it can be set to suit the shape of the tip or heel of the foot.

However, even if the bag is rectangular as shown in Fig. 1.2, the bag 1 protruding from the end of the foot or sock is flexible as shown in Fig. 5, so it can be bent appropriately, and the exothermic agent 2 can also solidify. By preventing this from happening, it adapts well to the partial shape of the foot and the shape of shoes, slippers, etc., and can be used favorably. Therefore, the shape that immediately corresponds to the partial shape of the foot in the present invention refers to all of these cases, and is quite wide-ranging. This requirement is met if the foot does not have a protruding part that does not conform to the shape of the foot.

In addition, when footwear with a branched thumb part, such as tabi socks, is used for indoor or outdoor use, it should be used only for the little toe group, and by separately preparing a footwear for the big toe group, it is possible to use it similarly. It is clear that it can be done.

Furthermore, as shown in FIG. 7, the device according to the present invention can be used by bonding the toe portion and the like so as to cover the front and back in a continuous manner. That is, for example, the above-mentioned breathable bag is prepared in a square or nearly square shape as shown in FIG. 6, and its half is glued to the upper surface of the foot as shown in FIG. Alternatively, it is possible to cover the side surfaces and adhere the other parts to the lower surface of the foot, and in this way, it is most effective for the ends such as the toes or the side of the lateral part of the foot. It becomes possible to give a thermal effect.

A specific manufacturing example of the product according to the present invention will be described below.

Production example 1 7.5C111X7. 60 iron powder in 1 OCI+ flat bag
-t%, water 20wt%, wood flour 5.5i1t%, vermiculite 5wt%, activated carbon 4.5wt%, and salt 5
8.0 g of exothermic agent 2 having a composition of wt% was charged into a flat shape with a thickness of 3 to 4 mm.

One side of the flat bag 1 is heat-sealed to a polyethylene sheet with fine continuous pores as an air permeable side 1a to have an air permeability of about 1.
000 seconds/100 cc, and the other side of the flat bag 1 is coated with a non-transferable adhesive made of a resin emulsion obtained by blending 98 parts by weight of an acrylic monomer with 2 parts by weight of a functional monomer. A drug layer 3 was formed and a release paper 4 was adhered thereto, and this was housed and sealed in a non-breathable packaging bag 5 of 13XIQcm made of a resin film to produce a product.

Production Example 2 Same as Production Example 1 except that the ventilation surface of the flat bag containing the exothermic agent was made of a nonwoven fabric laminated with a resin film whose air permeability under normal pressure was limited to approximately 1200 seconds/100 cc. The product was prepared in exactly the same manner as above and housed in a non-breathable packaging bag.

After opening the products according to the above manufacturing examples, they were glued to socks worn on the feet and used inside shoes, and the heat generation state of each of the 10 products was investigated.The results are as follows.

In other words, it was confirmed that all of them produced heat generation suitable for this type of disposable body warmer, and that the heat generating agent hardly solidified during use, allowing for stable and comfortable application. Of course, even if the adhesive was removed from the socks after application, the socks were hardly stained by the adhesive.

Production Example 3 Using the exothermic agent 2 mixed in the same proportion as in Production Example 1, 8g of this was charged into a flat bag 1 whose air permeability was limited to 1500 seconds/100cc, and this was similarly placed in a non-breathable packaging bag. The product was housed in

In other words, this product is used by directly adhering it to the upper surface of the toe of the foot, and the result of examining the heat generation state of 10 of them was that the maximum temperature was 37 to 39 degrees Celsius, and even if it was peeled off, the foot would not be affected. It was confirmed that the disposable warmer for shoes was preferable because no adhesive remained on the surface.

"Effects of the Invention" According to the present invention as explained above, a disposable body warmer can be appropriately applied inside an abdominal object such as a shoe by an adhesive method, that is, a special holder or the like is not required, and moreover, a thermal effect is required. It provides a footwear warmer that can provide accurate heat to the body part, is naturally low-cost, and can be used effectively and easily, which is not possible with conventional disposable body warmers, so it is industrially popular. This is a highly effective invention.

[Brief explanation of the drawing]

The drawings show the technical contents of the present invention, in which Fig. 1 is a plan view of an example of a mass-produced disposable body warmer according to the present invention, Fig. 2 is a partially cutaway slope view thereof, and Fig. 3 is a diagram illustrating the same. A bottom view of another embodiment, FIG. 4 is a cross-sectional view thereof, and FIG. 5 is an explanatory diagram of the state in which adhesive is applied to the foot part.
FIG. 6 is a plan view of still another embodiment, and FIG. 7 is an explanatory diagram of the state in which the adhesive is applied to the foot. In these drawings, 1 is a flat bag, 1a is its breathable surface, 1e is an arcuate or curved edge thereof, 2 is a heat generating agent, 3 is a non-stick adhesive layer, 4 is a release paper, and 5 is a 1 is a non-breathable packaging bag, 6 is a hermetically sealed portion thereof, 7 is a sock, and 8 is a foot. Patent applicant: Invention by Mycoal Kailowa Co., Ltd.
Person Akira Usui Man No. 1! ugly

Claims (8)

[Claims] 1. A heat generating agent is housed in a flat air-permeable bag having a shape corresponding to the partial shape of the foot, and a non-transfer adhesive layer is layered on one side of the air-permeable bag, and the non-transfer adhesive layer A disposable warmer for footwear such as shoes, characterized by a layer that adheres to the surface of the foot. 2. 2. The disposable warmer for footwear such as shoes according to claim 1, wherein a release paper is adhered to the non-adhesive adhesive layer, and the product is housed in a non-breathable packaging bag and sealed. 3. 3. The disposable warmer for footwear such as shoes according to claim 1, which uses a breathable bag that conforms to the shape of the toe portion. 4. 3. The disposable warmer for footwear such as shoes according to claim 1, which uses a breathable bag that conforms to the planar shape of the heel of the foot. 5. Claims 1 to 3, wherein the adhesive is attached to the upper surface of the toe side of the foot.
A disposable warmer for footwear such as shoes as described in any one of the above. 6. 4. A disposable warmer for footwear such as shoes according to any one of claims 1 to 3, wherein the toe portion of the foot is continuously covered and bonded on both sides. 7. A heat-stable adhesive that virtually does not remain on the object even if the non-transfer adhesive is applied to the human body or an object such as socks and then peeled off, and its adhesiveness hardly changes due to heat generation. The disposable warmer for footwear such as shoes according to claim 1. 8. Shoes, etc. according to claim 5, which is a non-stick adhesive obtained by introducing a reactive functional group into a rubber-based, acrylic-based, or vinyl acetate-based organic solvent-based or water-based adhesive to increase internal cohesive force. Disposable warmers for footwear.