JP4713395B2 - Disposable body warmer - Google Patents

Description

  The present invention relates to a disposable body warmer, and more specifically, is a disposable body warmer in which a heat generating material is sealed in a bag formed by thermocompression bonding between peripheral portions of a breathable sheet and a non-breathable sheet, and used as a set of two The present invention relates to the improvement of the packaging structure of disposable body warmers.

Today, disposable warmers in which a heat generating material containing iron powder or the like is enclosed in a breathable flat bag body are widely used. This type of disposable warmer is packaged in an airtight bag made of a non-breathable sheet one by one in an airtight manner. When the outer bag is torn and taken out during use, oxygen in the air Passing through and reacting with iron powder etc., the heat generating material generates heat.
The bag body that encloses the heat generating material is usually formed into a flat bag shape by thermocompression bonding of the peripheral portions of the breathable sheet and the non-breathable sheet or the breathable sheet having substantially the same shape.

  Such conventional disposable body warmers must be enclosed in the outer bag one by one at the time of manufacture, and there are limits to simplification of the manufacturing process and cost reduction. Moreover, since the outer bag must be broken and taken out at the time of use, it is troublesome, and since the outer bag becomes garbage, an improvement from the viewpoint of protecting the global environment has been desired.

  In order to solve such a problem, for example, in Patent Documents 1 and 2, a non-breathable exterior release sheet (exterior sheet) is joined to the outer side of the breathable sheet constituting the bag body in a detachable manner. It has been proposed that an outer bag is unnecessary.

  Further, in Patent Document 3, a plurality of bag bodies are connected to each other through a cut line, sealed in an outer bag in a state of being bent at the cut line, and taken out from the outer bag and separated from the cut line one by one at the time of use. Disposable warmers have been proposed.

Japanese Utility Model Publication No. 61-80015 JP 2002-360624 A Japanese Utility Model Publication No. 56-155817

However, even in the prior art disclosed in Patent Documents 1 and 2, since the exterior sheet must be bonded to the outside of the breathable sheet constituting the bag body, it is difficult to greatly simplify the manufacturing process and reduce the cost. Moreover, since the exterior sheet must be peeled off at the time of use, it is troublesome and the problem that the peeled exterior sheet becomes garbage remains.
Also in Patent Document 3, since the exterior bag is used, the above-described problem has not been solved.

  The present invention has been made in view of such a conventional situation, and the intended process is to eliminate the need for the aforementioned exterior bag or exterior sheet, simplify the manufacturing process, reduce costs, An object of the present invention is to provide a pair of new disposable warmers that can be used easily and can greatly reduce dust other than the body of the warmer.

  In order to achieve the above object, the present invention comprises two bags formed by thermocompression bonding of the peripheral portions of a breathable sheet and a non-breathable sheet, and each of the bags has a powder or sheet. A flat disposable body warmer in which a heat-generating material such as a tube is enclosed, and the two bags are superposed with the non-breathable sheet on the outside and the breathable sheet on the inside, and the ventilation in each bag The sealing sheet is formed in a state of being deformable into a sealed state in which the peripheral portions of the adhesive sheet are peeled from each other so as to be peeled and a use state in which the peripheral portions of the breathable sheet subjected to the heat pressing are separated into two bags. Features.

  According to such a configuration, the two bag bodies encapsulating the heat generating material are superposed on each other so that the non-breathable sheet is on the outside and the breathable sheet is on the inside, and the peripheral parts thereof are thermocompression-bonded so that they can be separated from each other. Therefore, a packaging structure in which a pair of warmers is integrated so that the air-permeable sheet does not come into contact with air. That is, without using an outer bag or an outer sheet, a pair of disposable warmers in which the heat generating material does not touch the air until it is used. In addition, since the peripheral edges facing each other in the breathable sheet of each overlapped bag body are thermocompression-bonded to each other, if the peripheral edges are peeled off to separate the two bag bodies, each bag The air-permeable sheet surface of the body is exposed and exposed to air, oxygen in the air passes through the air-permeable sheet and reacts with iron powder and the like, and the heat generating material in each bag generates heat and can be used.

In order to easily separate the two bags in the sealed state, when the outermost layer of the breathable sheet in each bag is thermocompression bonded between the peripheral portions of the outermost layers, It is preferably made of a film (so-called easy peel film) that is bonded with peelability.
As an easy peel film, for example, a film having an easy peel property in which a polystyrene resin or the like is coordinated on the surface of a polyethylene film and is thermocompression bonded with a peel strength that can be peeled off by hand (for example, Toray film processing) For example, “CF film 7601E series” manufactured by Co., Ltd. can be used.

  The peripheral portion of each bag body described above is thermocompression bonded with a bonding strength greater than the bonding strength between the peripheral portions of the breathable sheet that is thermocompression bonded with the easy peelability. That is, it is preferable that the respective bag bodies are formed by thermocompression bonding of peripheral portions of the air-permeable sheet and the non-air-permeable sheet with hardly peelability.

More specifically, the sealing strength (bonding strength) by thermocompression bonding between the peripheral portions of the breathable sheet and the non-breathable sheet when the bag is formed is, for example, 15 (N / 25 mm) or more, preferably 20 (N / 25 mm) or more and the peripheral part of the bag body itself as a non-peelable bonding part, while the sealing strength (peeling strength) by thermocompression bonding between the peripheral parts of the breathable sheet in each overlapped bag body For example, 8 to 24 (N / 25 mm), preferably about 10 to 17 (N / 25 mm), and the sealing strength (bonding strength)> the sealing strength (peeling strength). Let the peripheral edge be an easily peelable joint.
Each of the sealing strengths (bonding strength and peel strength) described above is obtained by opening the end of the sheet by 180 degrees with the two thermocompression-bonded sheets at the center, and in that state, the end of each sheet is After fixing to the gripping tool, a tensile stress is applied until the two thermocompression-bonded sheets are peeled, and the maximum stress until peeling is determined.

In use, the breathable sheet that is thermocompression bonded to each other in the two sealed bags so as to easily separate the stacked bags by separating the easily peelable joints. It is preferable that an operation piece for peeling off the thermocompression-bonded peripheral edge portion is extended to a part of the peripheral edge portion.
The operation piece is formed by stacking the bag bodies and forming the easily peelable joint portion by thermocompressing the peripheral edge portions facing each other in the breathable sheet so as to be peelable. It can form easily by making a part of edge part of the said breathable sheet into a non-thermocompression-bonding part outside.

The separation-type disposable body warmer described above is used as, for example, a so-called “non-stick type” that is used in a pocket of clothes, etc., but the present invention is a so-called “stick” that is used by being attached to an underwear or the like. It can also be applied to “types”.
In that case, a configuration in which an adhesive layer is provided on the outer side of the non-breathable sheet and the adhesive layer is covered with a releasable release sheet may be added. Here, the pressure-sensitive adhesive layer may be partially provided on the outer side of the non-breathable sheet or may be provided on the entire outer surface.
In such a configuration, when the release sheet is peeled off to expose the adhesive layer, it can be used as a so-called “stick type” disposable body warmer that is used by being attached to an underwear or the like.

  In addition, since the separate disposable body warmer according to the present invention includes two bags each encapsulating a heat generating material as a set, for example, for heating in gloves or for heating in shoes, It can be suitably used when required as a set.

  As described above, the present invention is a set of two disposable warmers in which the heat generating material is not exposed to air until use, and the peripheral edges of the overlapped bag bodies are thermocompression-bonded so as to be peeled from each other, If the peripheral portions are peeled apart to separate the bags, the heat generating material in the bags is heated and can be used. Therefore, an exterior material such as an exterior bag or an exterior sheet is not necessary, and the manufacturing process can be simplified and the cost can be reduced, and the bag body can be used simply by separating. In addition, an extremely simple exterior-less packaging structure that does not require an exterior material can be realized, the generation of garbage after use can be greatly reduced, and it can be provided as a disposable warmer friendly to the global environment. In addition, since it is a pair of warmers, it is used in left and right pockets, when it is required as a pair of left and right, such as for warming in gloves or for warming in shoes There are many effects such as being able to be suitably used.

Hereinafter, an example of an embodiment of a disposable body warmer according to the present invention will be described based on the drawings.
As shown in FIGS. 1 and 2, the disposable body warmer a of the present example is formed by superposing substantially flat bag bodies 2 and 2 in which a heat generating material 1 is sealed and thermocompression-bonding the peripheral portions so as to be peeled from each other. .
The heat generating material 1 is a mixed powder in which, for example, iron powder, water, vermiculite, activated carbon, salts and the like are mixed, and generates heat by reacting with oxygen. In addition, as the heat generating material, the mixed powder can be formed into a sheet shape, or a sheet-like material in which the mixed powder is held can be used.

  The bag body 2 is at least partially breathable so that oxygen can be supplied to the heat generating material 1 inside. Specifically, the peripheral edges of the breathable sheet 3 and the non-breathable sheet 4 having substantially the same shape. The parts are thermocompression-bonded with a seal strength (bonding strength) of about 20 (N / 25 mm) to form a hardly peelable bonded portion 5, thereby forming a substantially flat bag shape.

  As shown in FIG. 4, the air-permeable sheet 3 is a non-peelable joining layer 3a whose innermost layer (joining surface with the non-breathable sheet 4) is made of a low-density polyethylene film or the like. A laminated sheet in which an easy-peelable bonding layer 3c made of an easy peel film as the outermost layer (inner layer of the bag body 2) is laminated, It consists of a perforated sheet in which a large number of through holes (not shown) having a small diameter are formed in the part.

  As shown in FIG. 4, the non-breathable sheet 4 is a hard-peelable joining layer 4 a whose innermost layer (joining surface with the breathable sheet 3) is made of a low-density polyethylene film or the like, on which a vinylidene chloride film is formed. And a non-breathing layer 4c made of a polypropylene film as the outermost layer (outer surface layer of the bag body 2) is laminated thereon.

  The peripheral portions of such a breathable sheet 3 and the non-breathable sheet 4 are thermocompression bonded at a predetermined temperature and a predetermined pressure, whereby a hardly peelable bonding layer (low density polyethylene film) 3a, which is the innermost layer of each other, 4a are joined with a sealing strength of about 20 (N / 25 mm), thereby forming a hardly peelable joining portion 5 to constitute the bag body 2 described above.

  As shown in FIG. 2, each bag body 2 can be overlapped so that the air permeable sheet 3 is on the inside, and the peripheral edge portions facing each other in the air permeable sheets 3 and 3 of each bag body 2 can be peeled off. Are bonded to each other in a sealed manner so that they can be separated by peeling off the easily peelable joint 6. .

  In other words, the peripheral portions of the air-permeable sheets 3 in the overlapped bag bodies 2 and 2 that are opposite to each other are thermocompression bonded at a predetermined temperature and a predetermined pressure, whereby an easily peelable bonding layer (easy peel) that is the outermost layer of each other. Film) The peripheral portions of 3c and 3c are joined to each other with a seal strength (peel strength) of about 10 to 17 (N / 25 mm), whereby an easily peelable joint 6 is formed, and two bag bodies 2 and 2 are formed. Constitutes a separation-type disposable body warmer a joined in a sealed manner.

Operation pieces 7a and 7b for peeling off the easily peelable joint portion 6 are extended from a part of the peripherally bonded portion (easy peelable joint portion 6) of the overlapped bag bodies 2 and 2. ing.
When the operation pieces 7a and 7b form the easily peelable joint portion 6 by thermocompression-bonding the peripheral edge portion so as to be peeled off, the operation pieces 7a and 7b It can be easily formed by making the part a non-thermocompression bonding part.
By providing the operation pieces 7a and 7b formed in this way, the easy-release peelable joint portion 6 is peeled off during use, and the bag bodies 2 and 2 that are overlapped in a sealed manner are shown in FIG. Can be easily separated.

  According to the disposable body warmer a of the present example having the above-described configuration, at the time of manufacture, two bag bodies 2 in which the heat generating material 1 is enclosed are formed, and these bag bodies 2 and 2 are made of a breathable sheet. 3 is a separate type disposable body warmer a in which the peripheral edges facing each other in the breathable sheets 3, 3 are peeled from each other so that they can be peeled, and the peripheral edges are used as easily peelable joints 6. (FIGS. 1 and 2).

  Such a separate disposable body warmer a is sealed in an outer bag made of a non-breathable sheet because the air vent surface of the bag body 2 (the surface formed by the air permeable sheet 3) has a sealed structure that does not come into contact with air. It becomes a packaging structure that can be stored and transported as it is without the need to be covered with an exterior sheet.

When using, if the operation pieces 7a and 7b are picked with a finger and the peripheral edge portion (easy peelable joint portion 6) is peeled off to separate the overlapped bag bodies 2 and 2, two ordinary disposable warmers a are obtained. There is a certain state (FIG. 3). In this state, the breathable sheet 3 of each bag body 2 is exposed and exposed to air, oxygen in the air passes through the breathable sheet 3 and reacts with iron powder and the like, and the heating material 1 generates heat, Can be used.
Therefore, it is suitable for the case where each bag body 2, 2 is used in the left and right pockets, or is required as a pair of left and right, such as for warming in gloves or for warming in shoes. Can be used.

The above-described disposable body warmer a is one in which the present invention is applied as a so-called “non-stick type” hand warmer, and FIGS. 5 to 7 show examples in which the present invention is applied to a so-called “stick type” hand warmer.
The disposable body warmer a ′ in this example is configured as a “sticking type” body body by providing the adhesive layer 11 on the outside of the disposable body warmer a shown in FIGS. 1 to 4, and other components are the disposable body described above. Since it is the same as Cairo a, some of the overlapping illustrations and explanations are omitted by attaching the same reference numerals in the figure.

That is, the separation-type disposable body warmer a ′ of this example is provided with the pressure-sensitive adhesive layer 11 on the entire outer surface or part of the non-breathable sheet 4, and the pressure-sensitive adhesive layer 11 can be peeled off such as a polyethylene film. It is covered with a release sheet 12.
Further, each bag body 2 is considered to be used by being attached to the inside of a glove, the inner bottom of a shoe, a sock, or the like, as shown in FIG. It is formed in a foot shape.

  The separation-type disposable body warmer a ′ of this example having such a configuration has the same effect as the above-described disposable body warmer a, and when the adhesive sheet 11 is exposed by peeling the release sheet 12 during use, It can be used as a so-called “sticking type” disposable body warmer that is used by being attached to underwear, gloves, socks and the like.

  In the example of FIGS. 1 to 4, a warmer made of a rectangular bag body 2 made of a rectangular breathable sheet 3 and a non-breathable sheet 4 is shown. In the examples of FIGS. Although the body warmer which consists of the substantially leg-shaped bag body 2 was shown, the shape of the bag body is not limited to these. For example, the breathable sheet 3 and the non-breathable sheet 4 are cut into various shapes, for example, a triangular shape. The shape can be selected as appropriate, such as a pentagonal shape, a circular shape, an elliptical shape, a semicircular shape, and a semielliptical shape.

  As mentioned above, although the embodiment of the separation-type disposable body warmer according to the present invention has been described based on the drawings, the present invention is not limited to the illustrated examples, and within the scope of the technical idea described in the claims. It goes without saying that various changes are possible.

It is a perspective view of the state (packaging state) in which two bags were joined in a sealed manner according to an example of an embodiment in which the present invention was applied to a “non-stick type” disposable body warmer. It is a center longitudinal cross-sectional view of the warmer shown in FIG. It is a center longitudinal cross-sectional view of the state (use state) which isolate | separated the body warmer concerning FIG. 1 into two. It is an enlarged view of the peripheral part in the bag of Cairo shown in FIG. It is a perspective view of a state (packing state) in which two bags are joined in a sealed manner according to an example of an embodiment in which the present invention is applied to a “sticking type” disposable body warmer. It is a center longitudinal cross-sectional view of the warmer shown in FIG. It is a center longitudinal cross-sectional view of the state (use state) which isolate | separated the warmer shown in FIG. 5 into two.

Explanation of symbols

a: Disposable body warmer (type that does not stick)
a ': Disposable body warmer (Paste type)
1: Heat generating material 2: Bag body 3: Breathable sheet 4: Non-breathable sheet 5: Hard peelable joint 6: Easy peelable joint 7a, 7b: Operation piece 11: Adhesive layer 12: Release sheet

Claims (6)

A disposable body warmer comprising two bags formed by thermocompression bonding of the peripheral parts of a breathable sheet and a non-breathable sheet, and a heating material enclosed in each bag body,
The two bag bodies are overlapped in a state where the non-breathable sheet is on the outside and the breathable sheet is on the inside, and a sealed state in which the peripheral portions of the breathable sheet in each bag body are thermocompression-bonded so as to be peelable,
A separation-type disposable body warmer formed so as to be deformable into a use state in which peripheral portions of the thermocompression-permeable breathable sheet are peeled apart and separated into two bags.   2. The separation mold according to claim 1, wherein the outermost layer of the breathable sheet in each of the bags is formed of a film that is bonded with ease when the peripheral portions of the outermost layer are thermocompression bonded together. Disposable body warmer.   The separation-type disposable body warmer according to claim 1 or 2, wherein each bag body is formed by thermocompression bonding of peripheral portions of the air-permeable sheet and the non-air-permeable sheet with hardly peelability.   In the two bag bodies in the sealed state, an operation piece for peeling off the thermocompression-bonded peripheral portion is extended to a part of the peripheral portion of the breathable sheet that is thermocompression-bonded to each other. The separation-type disposable body warmer according to any one of claims 1 to 3.   The separation-type disposable body warmer according to any one of claims 1 to 4, wherein an adhesive layer is provided on the outer side of the non-breathable sheet, and the adhesive layer is covered with a peelable release sheet.   The separable disposable body warmer according to any one of claims 1 to 5, wherein the bag body separated into two parts is used for warming in gloves or for warming in shoes.

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