JP3046548U - Heating element - Google Patents

Abstract

(57) [Problem] To provide a heating element in which a design formed in an inner bag does not disappear due to water vapor and friction, and furthermore, the appearance of the design is improved. SOLUTION: The heat generating composition is such that a heat-generating composition which generates heat in the presence of air is contained in a gas-permeable inner bag 1, and the inner bag 1 is sealed in an air-tight bag. A heating element characterized in that the design 3 is formed by projecting a predetermined portion of the inner bag 1 outward or inward by embossing.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a heating element. More specifically, the present invention relates to a heating element in which a design formed on a storage bag does not disappear due to water vapor and friction, and the appearance of the design is improved.

[0002]

[Problems to be solved by conventional techniques and devices]

 Conventionally, a heating element in which a heat-generating composition that generates heat in the presence of air is stored in a breathable storage bag (inner bag), and the inner bag is packaged in a non-air-permeable bag (outer bag) has been known. I have. This heating element is provided with a non-transferable adhesive layer on one side of the inner bag, so that it can be used as a so-called stick-type body warmer, or it can be used for warming limbs and waist, as well as small and thin for heating the soles of the feet. And others used as disposable body warmers have been proposed.

[0003] On the outer surface of the inner bag, a pattern composed of characters and / or patterns has been formed conventionally for the purpose of improving decorativeness, advertising a product name or a company name, and the like. Conventionally, a pattern is formed by printing on a film material constituting an inner bag.

However, when used, the inner bag is exposed to water vapor generated from the heat-generating composition inside the inner bag, and is rubbed with hands, clothes, and the like, and is subjected to so-called moistening. For this reason, there is a problem that the ink which is a component of the pattern is easily peeled off. Therefore, the conventional inner bag has a problem that the color baldness (bleaching or discoloration) of the pattern or the fluff is conspicuous as the use time elapses, and the printed pattern becomes blurred and difficult to read, and the appearance becomes poor. is there.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a heating element in which a pattern formed on an inner bag does not disappear due to water vapor and friction, and the pattern has a good appearance. Aim.

[0006]

[Means for Solving the Problems]

 The heating element according to claim 1, which is the first invention, includes a heat-generating composition that generates heat in the presence of air in an air-permeable inner bag, and the inner bag is sealed in an air-tight bag. A heat generating element comprising: a predetermined portion of the inner bag is projected outward or inward by embossing, whereby a pattern is formed on the inner bag. .

It is preferable that the inner bag is made of a heat-fusible resin, and the predetermined portion is protruded by embossing while heating.

It is preferable that the inner bag is formed of a laminate of paper or nonwoven fabric and a polyethylene film.

In the heating element according to the second invention, a heat-generating composition that generates heat in the presence of air is contained in a gas-permeable inner bag, and the inner bag is in an air-tight bag. A heat generating element sealed in the inner bag, wherein a predetermined portion of the inner bag is thinned by stamping, so that a pattern is formed on the inner bag.

[0010] It is preferable that the inner bag is made of a heat-fusible resin, and the predetermined portion is thinned by stamping while heating.

It is preferable that the inner bag is made of a laminate of paper or a nonwoven fabric and a polyethylene film.

[0012] According to the first invention, a pattern comprising characters and / or patterns is formed on the inner bag by partially projecting the film constituting the inner bag outward or inward by embossing. ing. For this reason, there is no problem such as color baldness or fluffing of the design that occurs when the design is formed by conventional printing.

According to the second invention, the thickness of the film constituting the inner bag is partially reduced by stamping, so that the heat-generating composition inside the inner bag can be seen through to the outside, and As in the case of the first invention, there is no problem such as color baldness or fluffing of the design that occurs when the design is formed by conventional printing.

[0014]

[Embodiment of the invention]

 The heating element according to the present invention has a disposable body warmer (including, for example, a body warmer for limbs, waist, etc., which is used as a warmer for sticking or not sticking, or a thin type warmer for soles of feet), and a heating effect. Medical heating elements (including, for example, dry hot-compressing methods such as sticking or non-sticking type medical heating elements used to heat and / or keep warm humans or local areas of animals); and It means a heating element used for food, beverages, etc. for the purpose of keeping warm.

Hereinafter, the heating element of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an explanatory plan view showing an embodiment of the heating element of the first invention, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1, and FIG. 3 shows an embodiment of the heating element of the second invention. 4 and FIG. 4 are partially enlarged sectional views of FIG.

First, a heating element according to the first invention will be described.

The heating element shown in FIGS. 1 and 2 contains a heat-generating composition 2 that generates heat in the presence of air inside a gas-permeable inner bag 1, and the inner bag 1 is not shown in an airtight manner. It is constituted by being enclosed inside the outer bag of the sex. Note that the heating element shown in FIGS. 1 and 2 is taken out of the outer bag and used. In a predetermined portion of the inner bag 1, a pattern 3 is formed by embossing.

The shape of the pattern 3 is not particularly limited in the present invention, and various patterns such as characters, figures, patterns, marks, trade names, or combinations thereof can be adopted. For example, as shown in FIG. 1, a figure (circle) 3a in which only the outline is embossed, a figure (triangle) 3b in which the whole is embossed, and a figure (cross) 3c in which a line is embossed, and the like are given. . Further, a pattern consisting of a continuous pattern such as a polka dot pattern or a striped pattern may be used.

When the design 3 is formed on the inner bag 1, the film forming the upper surface of the inner bag 1 is sent to an embossing molding machine having a male mold and a female mold corresponding to the design 3, and Embossing may be applied to the part of the part so as to partially project outward or inward.

Since the design 3 is obtained by physically deforming the film constituting the inner bag 1 by embossing, the color baldness of the design which occurs when the design is formed by conventional printing is used. Or problems such as fluffing are completely eliminated.

After the embossing process, the exothermic composition 2 is filled between the two films while laminating the film on the upper surface side and the film on the lower surface side on which the pattern is attached and forming a bag-like shape. The inner bag 1 is formed. Furthermore, if the inner bag 1 is sealed in an airtight outer bag (not shown), the heating element of the first invention can be obtained.

When the inner bag 1 is manufactured, the inner bag 1 may be manufactured using a material in which a predetermined portion is embossed in advance, or the inner bag 1 may be formed from a non-embossed material. After manufacturing the above, a predetermined portion may be embossed.

The film on the lower surface side may form a pattern similarly to the film on the upper surface side. However, when an adhesive layer or a non-slip layer, which will be described later, is formed on the outer surface of the film on the lower surface side, the pattern need not be formed.

Further, the inner bag 1 may be made of a film made of a heat-fusible resin, and a predetermined portion of the film may be protruded by embossing while heating and heat-sealing the heat. . In this case, since the portion of the design 3 is heat-sealed, the irregularities on the surface of the inner bag 1 constituting the design 3 are not flattened, and as a result, the design does not disappear.

As the heat-fusible resin film, for example, a laminate of a paper or non-woven fabric and a polyethylene film is used, which is soft, strong, and stable in quality. Therefore, it is preferable. In addition to the nonwoven fabric, a laminate of another cloth and a polyethylene film may be used.

For example, when a laminate of a nonwoven fabric having a thickness of about 50 to 200 μm and a polyethylene film is used as the material of the inner bag 1, a male mold for embossing is heated to about 80 to 100 degrees. When the laminate is embossed at a pressure of about 500 to 1000 kg f / cm ² for about 0.1 to 0.5 seconds in this state, the pattern 3 can be formed.

It is preferable that a predetermined portion of the inner bag 1 is protruded outward by at least about 10 to 200 μm so that the symbol 3 can be easily visually recognized.

The inner bag 1 shown in FIGS. 1 and 2 is a flat air-permeable bag having small holes or fine holes, and at least a part of the inner bag 1 has a gas-permeable surface. is there. That is, one surface (the lower surface in FIG. 1) may be a gas-permeable surface and the other surface may be a gas-impermeable surface, or both surfaces may be gas-permeable surfaces. Furthermore, one of the surfaces may be partially permeable and the rest may be non-permeable.

The air permeability of the inner bag 1 is not particularly limited, but the size of the air holes may be any size as long as the contents do not spill, for example, about 0.5 mm or less, and the air volume is As long as the exothermic composition 2 can generate heat, it is not particularly limited in the present invention, but is usually a value measured by the A method (humidity sensor method) specified in JIS K 7129. Is 50 to 3000 g / m ² · day, preferably 200 to 1300 g / m ² · day, and particularly preferably 300 to 1000 g / m ² · day.

As a method of adjusting the air permeability of the air permeable surface of the inner bag 1, a method of performing an appropriate heat fusion treatment on a sheet or a film having fine continuous pores can be mentioned. Specifically, for example, the heat-sealed portion can be evenly dispersed in a sheet or a film having uniform continuous pores of 1 to 50 μm, or the whole can be applied to limit the air permeability. The air permeability may be adjusted by performing a perforation process.

The heat fusion at the portion of the design 3 is only for maintaining the shape of the design 3 and not for adjusting the air permeability.

In addition, by laminating a resin film provided with fine air holes on the nonwoven fabric, the air permeability can be restricted.

The size of the inner bag 1 is not particularly limited in the present invention, but usually, a size in a range of 4 × 6 cm to 15 × 20 cm can be used.

The exothermic composition 2 enclosed in the inner bag 1 includes, for example, metal powder such as iron powder (preferably metal powder treated with sulfur or a sulfur-containing compound), activated carbon, water, water retention agent (wood). Powders, vermiculite, diatomaceous earth, perlite, silica gel, alumina, water-absorbing resin, etc.), salt, and the like can be used, but are not limited thereto.

Although not shown, a non-transferable pressure-sensitive adhesive layer made of a normal pressure-sensitive adhesive substance mainly composed of rubber or the like is formed on the surface of the inner bag 1, and is formed on the pressure-sensitive adhesive layer. A release paper may be covered. In this case, at the time of use, the release paper is peeled off, and the inner bag 1 can be stuck to a desired site using the non-transferable pressure-sensitive adhesive layer.

Further, although not shown, if a non-slip layer is formed on the surface of the inner bag 1, a slip-preventing effect can be exerted when the inner bag 1 is used in shoes.

Further, by adjusting the air permeability, the contents can be held under a negative pressure so as not to be offset.

Next, a heating element according to the second invention will be described.

The heating element shown in FIGS. 3 and 4 is, like the heating element shown in FIGS. 1 and 2 described above, a heat-generating composition 2 that generates heat in the presence of air inside a gas-permeable inner bag 1. Are common in that the inner bag 1 is sealed in an airtight outer bag (not shown). However, a difference is that a symbol 4 is formed in a predetermined portion of the inner bag 1 by partially reducing the film thickness by stamping. Since the thickness of the inner bag 1 is small in the portion where the concave portion 5 is present, the exothermic composition 2 can be seen through to the outside, and a pattern 4 similar to the pattern 3 in FIG. The recess 5 may be a hole or a groove.

In the design 4 shown in FIGS. 3 and 4, the inner side of the inner bag 1 is recessed and the outer side is flat, but the present invention is not limited to this. It may project from

The shape of the pattern 4 is not particularly limited in the present invention, as in the case of the pattern 3, and may be a character, a graphic, a pattern, a mark, a trade name or a combination thereof, or a continuous pattern. , Various designs can be adopted.

When the pattern 4 is formed on the inner bag 1, the film constituting the upper surface of the inner bag 1 is sent to a stamping molding machine having a male mold and a female mold corresponding to the pattern 4, and The thickness of the portion may be partially reduced by stamping so that the exothermic composition 2 inside the inner bag 1 can be seen through to the outside.

The pattern 4 obtained by stamping is obtained by physically deforming the film constituting the inner bag 1 by stamping, as in the case of the above-described pattern 3, and thus is obtained by conventional printing. Problems such as color baldness or fluffing of the design that occur when the design is formed are completely eliminated.

After the stamping process, the exothermic composition 2 is filled between the two films while the film on the upper surface and the film on the lower surface on which the pattern is formed are overlapped and formed into a bag shape. The inner bag 1 is formed. The film on the lower surface side may be of any type, as in the case of the above-mentioned symbol 3, whether or not to form a symbol. Furthermore, if the inner bag 1 is sealed in an airtight outer bag (not shown), the heating element of the second invention can be obtained.

When the inner bag 1 is manufactured, the inner bag 1 may be manufactured using a material in which a predetermined portion is stamped in advance, or the inner bag 1 may be formed from a material that has not been stamped. After the production, a predetermined portion may be stamped.

Further, the inner bag 1 may be made of a film made of a heat-fusible resin, and may be thinned by stamping while heating and heat-fusing a predetermined portion of the film. In this case, the design 4 does not disappear because the portion of the design 4 is heat-sealed.

As the heat-fusible resin film, for example, paper or a laminate of nonwoven fabric 6 and polyethylene film 7 may be used in the same manner as described above.

For example, when a laminate of a non-woven fabric 6 having a thickness of about 50 to 200 μm and a polyethylene film 7 is used as the material of the inner bag 1, the male mold for stamping is reduced to about 80 to 100 degrees. When the laminate is stamped at a pressure of about 500 to 1000 kgf / cm ² for about 0.1 to 0.5 seconds in a heated state, a predetermined portion of the polyethylene film 7 is formed as shown in FIG. The concave portion 5 is formed by heat fusion, and as a result, the pattern 4 can be formed.

When the thickness of the inner bag 1 is 50 to 200 μm, the predetermined portion is 25 to 200 μm so that the exothermic composition 2 can be clearly seen outside and the design 4 can be easily visually recognized. It is preferable that stamping is performed to a thickness of about 100 μm.

[0051] In this way, by forming a design by thinning a part of the inner bag, when the contents are put into the inner bag, the design emerges more clearly.

[0052]

[Effect of the invention]

 According to the present invention, the pattern is formed on the inner bag by embossing to make the inner bag uneven, or by partially reducing the film thickness of the inner bag by stamping. It does not disappear due to friction, and the design can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory plan view showing an embodiment of a heating element of the first invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an explanatory sectional view showing an embodiment of the heating element of the second invention.

FIG. 4 is a partially enlarged sectional view of FIG. 3;

[Explanation of symbols]

 1 inner bag 2 exothermic composition 3, 4 pattern

Claims (6)

[Utility model registration claims] 1. A heating element in which a heat-generating composition that generates heat in the presence of air is stored in a breathable storage bag, and wherein the storage bag is sealed in an airtight bag. A heating element in which a design is formed on the storage bag by projecting a predetermined portion of the bag outward or inward by embossing. 2. The heating element according to claim 1, wherein the storage bag is made of a heat-fusible resin, and the predetermined portion is protruded by embossing while heating. 3. The heating element according to claim 2, wherein the storage bag is made of a laminate of paper or a nonwoven fabric and a polyethylene film. 4. A heating element in which a heat-generating composition is housed in an air-permeable storage bag in the presence of air, and wherein said storage bag is sealed in an air-tight bag. A heating element in which a predetermined portion is thinned by stamping to form a design on the storage bag. 5. The heating element according to claim 4, wherein the storage bag is made of a heat-fusible resin, and the predetermined portion is thinned by stamping while heating. 6. The heating element according to claim 5, wherein the storage bag is made of a laminate of paper or a nonwoven fabric and a polyethylene film.