JP2008119090A - Throwaway body warmer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent air from leaking at both ends of a folded portion and secure hermetical sealability in a folded condition in a jacketless folded body warmer which makes a jacket material such as a package (bag) unnecessary, permits manufacturing to be simplified and costs to be reduced, can be simply used, and does not cause much dirt during use. <P>SOLUTION: A bag member 2 made up of a gas-permeable sheet 3 and a gas impermeable sheet 4 and enveloping a heating material 1 is folded in two by folding at the central portion to make the gas-permeable sheet 3 the inside. Facing edges with the exception of the folded portion in the gas-permeable sheet 3 are separably thermocompression bonded to make it a hermetically sealed jacketless packaging form. To use the warmer, the edges of the folded bag member 2' are pulled apart and opened. Sealed and compressed portions (secondary sealed portions) 10 are formed by secondary thermocompression bonding at the right and left ends of the folded portion 6 of the folded bag member 2'. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a disposable body warmer, and more particularly, a packaging in a disposable body warmer in which a heat generating material is sealed in a bag formed by joining peripheral edges of a breathable sheet and a non-breathable sheet with a releasability and forming a flat bag shape. It relates to improvement of form.

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 body warmer is packaged in a sealed bag (exterior bag) made of a non-breathable sheet, hermetically sealed one by one, and when the packaging bag is broken and taken out during use, oxygen in the air Passes through the bag, and 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 having substantially the same shape, or between the breathable sheets.

  Such a conventional disposable body warmer has to be enclosed in a packaging bag (exterior bag) one by one with a heat generating material enclosed at the time of manufacture, which limits the simplification and cost reduction of the manufacturing process. was there. Moreover, since the packaging bag must be torn and taken out at the time of use, it is troublesome, and since the packaging bag becomes garbage, an improvement from the viewpoint of protecting the global environment has been desired.

In order to solve such a problem, the applicant of the present invention, as shown in FIGS. 11 and 12, the flat bag in which the peripheral portions of the breathable sheet 101 and the non-breathable sheet 102 become the hardly peelable joining portion 103. The bag body 100 having a shape and encapsulating the heat generating material 104 is folded in a central portion so that the air-permeable sheet 101 is inside, and the folded portion of the bi-fold bag body 100 is folded. Edges opposite to each other except 105 constitute a sealed outer-less packaging form in which the easily peelable joints 106 are formed, and the edges of the foldable bag body 100 joined with the easily peelable parts ( A two-fold new disposable body warmer that uses the peelable joint 106) in a peeled and unfolded form has been proposed previously (see Patent Document 1).
According to this two-fold type disposable warmer, a packaging bag (exterior bag) is not required, the manufacturing can be simplified and the cost can be reduced, it can be used easily, and waste other than the warmer body can be greatly reduced. There are many effects.

Japanese Patent Application No. 2006-125787

However, regarding the above-described two-fold type disposable body warmer, the technical contents were examined in detail, and it was found that there was room for improvement in the following points.
That is, according to the previously proposed two-fold type disposable body warmer by the present applicant, as shown in FIG. 13, when the bag body 100 is folded at the center portion 105 so that the air-permeable sheet 101 is inside, it is folded in two. In the case where wrinkles are generated in the bent portion 105, or the so-called tunnel 110 is formed by the presence of the heat generating material 104 in the bent portion 105, the left and right end portions of the bent portion 105 (the width direction end portions of the bag body 100). ), The edges of the breathable sheet 101 are difficult to be joined to each other. As a result, the airtightness is reduced at the end of the bent portion 105, and there is a possibility that air may flow in from there, and the folded bag body 100 is not sealed, and the heat generating material 104 may generate heat. There is sex.

  The present invention has been made in view of the above-described conventional circumstances, and the intended process is that when the above-described bag body is folded at the center portion and folded in half, the breathable sheet is also formed at both ends of the folded portion. It is an object of the present invention to provide an exterior-less hermetic disposable body warmer in which there is no fear that the heat generating material will generate heat in a folded packaging form so that the edges of the two are securely adhered and joined.

  In order to achieve the above object, the present invention has a flat bag shape in which the peripheral portions of the breathable sheet (3) and the non-breathable sheet (4) are joined together with hardly peelability, and the heating material (1 ) Is enclosed in a central portion so that the air-permeable sheet is inside, and the folded portion (6) of the folded body (2 ′) is folded. The edges facing each other except for the above form a hermetically sealed outer-less packaging form that is joined with easy peelability, and the edges that are joined with easy peelability in the folded bag body (2 ') Is a two-fold type disposable body warmer that is used by being peeled and unfolded, and air from both ends of the folded portion (6) of the folded bag body (2 '). Sealing crimping part (10) to prevent inflow It is characterized in that is.

  According to such a configuration, the bag body is folded in half so that the non-breathable sheet is on the outside and the breathable sheet is on the inside, and edges facing each other in the breathable sheet are easily peeled off. In addition, since the left and right ends of the folded portion of the folded bag body are sealed with sealing pressure-bonding portions, the air-permeable sheet does not come into contact with air and is completely sealed. It becomes a packaging structure. That is, when the bag body is folded in half, wrinkles are formed in the folded portion, or a so-called tunnel is formed by the presence of a heat generating material in the folded portion. Even if the edges of the air-permeable sheet are difficult to be joined to each other in the width direction both ends, the both ends of the bent portion are further sealed with the sealing crimping portions. Inflow can be prevented. Therefore, the sealing property in the folded bag body is ensured, the packaging material (exterior bag) is not used, and the heating material does not touch the air until it is used (when deployed). It can be provided as a disposable body warmer.

  The sealing crimping part (10) is preferably formed by thermocompression bonding of the left and right ends of the folded part (6) in the bag body (2 ′) in the form of the two-fold exterior-less packaging. .

  The sealing crimping part (10) can be formed in the region of the edge part (easy peelable joint part) joined with the easy peelability in the folded bag body (2 ').

  Moreover, the said sealing crimping | compression-bonding part (10) may be formed exceeding the area | region of the edge part (easy-peelable joining part) joined with the said easy-peelability in the said half-fold bag body (2 '). it can.

  Moreover, the said sealing crimping | compression-bonding part (10) can be formed over the full length of the said bending part (6) in the said half-folded bag (2 ').

  Moreover, the said sealing crimping | compression-bonding part (10) is formed in strip | belt shape over the full length of the said bending part (6) in the said half-folded bag body (2 '), This strip | belt-shaped sealing | crimping crimping | compression-bonding part (10) The heating material (1) can be enclosed in the left and right internal spaces (2a, 2b) partitioned by.

  In order to ensure hermeticity at both ends of the folded portion (6) of the bag body, it is better that the formation region of the sealing crimping portion (10) is wide, and a belt-like sealing over the entire length of the folded portion (6). It is preferable to set it as a crimping part (10).

In order to form a hermetically sealed outer-less packaging form in which the opposite edges excluding the folded portion (6) of the folded bag body (2 ′) are joined with easy peelability, the breathable sheet is used. (3) is preferably made of an easy peel film that is bonded with easy peelability when the opposite edges of the breathable sheet are thermocompression bonded.
When it is set as such a structure, the edges which mutually oppose in the bag body folded in half can be thermocompression-bonded (heat-sealed) with easy peelability, and a sealed two-fold form can be formed easily. it can. And, in use, the edge portions facing each other in the folded bag body can be easily peeled to easily unfold the folded bag body. In the unfolded bag body, the breathable sheet surface is exposed and exposed to air, and oxygen in the air passes through the breathable sheet and reacts with the heat generating material in the bag body to generate heat.

In order to make it easy to peel off the edges joined with the easy peelability in the folded bag body (2 ′), the easy peel in the folded bag body (2 ′). It is preferable to form a non-joining part (30) when the edges are peeled off at a part of the edges joined with good performance.
In this case, it is possible to peel off the close-contact edges of the folded bag body very easily using the non-joined portion as a clue.
The non-joining part is easy by not thermocompression-bonding the operation piece extended to a part of the edge part when the edge parts facing each other in the bifurcated breathable sheet are peelable. Can be formed.

The disposable warmer in the present invention can be used as a so-called non-stick type disposable warmer that is held in a hand or put in a pocket.
In addition, when an adhesive layer that is covered with a release sheet is provided on the inside or outside of the bag body, the adhesive layer is exposed by peeling the release sheet at the time of use, so that it is attached to clothing or the like. Can be used as a type of disposable warmer.

As an aspect in the case of making a paste type disposable body warmer, an aspect in which an adhesive layer is provided on a part of the breathable sheet and the adhesive layer is covered with a release sheet can be exemplified.
Moreover, while providing the adhesion layer on the outer side of the said non-breathable sheet | seat, the aspect which covered this adhesion layer with the peeling sheet can be mention | raise | lifted.
Moreover, the aspect which forms the adhesion layer covered with the peeling sheet in the said non-joining part can be mention | raise | lifted as one aspect | mode of the said pasting type disposable body warmer.

  Note that the peripheral portions of the breathable sheet and the non-breathable sheet forming the bag body in which the heat generating material is sealed have a bonding strength that is greater than the bonding strength between the mutually opposing edges in the folded breathable sheet. Needless to say, bonding is performed. Usually, the said bag body is formed by thermocompression-bonding the peripheral parts of a breathable sheet and a non-breathable sheet | seat with difficulty 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. As described above, the peripheral edge portion of the bag body itself is set as a hardly peelable joint portion. On the other hand, the sealing strength (peeling strength) by thermocompression bonding of the edges facing each other in the breathable sheet of the folded bag body is, for example, about 8 to 24 N / 25 mm, preferably about 10 to 17 N / 25 mm, and The edge is made an easily peelable joint so that the seal strength (joint strength)> the seal strength (peel strength).
Each of the sealing strengths (bonding strength and peel strength) described above is obtained by opening the ends of the two sheets that are thermocompression-bonded at the center by 180 degrees, and in this state, the ends of the sheets are After fixing to the gripping tool, a tensile stress was applied until the two thermocompression-bonded sheets were peeled, and the maximum stress until peeling was determined.

In order to set the sealing strength (peeling strength) by thermocompression bonding between mutually facing edges of the breathable sheet of the folded bag body within the above-mentioned range, and to make the edges easy-peelable joints As described above, it is preferable that at least the outermost layer of the breathable sheet is made of a film (so-called easy peel film) that is bonded with ease when the peripheral portions of the outermost layer are thermocompression bonded.
As an easy peel film, for example, a styrene resin or the like is arranged on the surface of a polyethylene film, and a film having an easy peel property (for example, Toray film processing ( Co., Ltd. “CF film 7601E series” or the like can be used.

As described above, the present invention folds the flat bag body in which the heat generating material is encapsulated into two, and folds it in two, and joins the opposing edges so as to be peelable to form a sealed outer-less packaging form, It is a double-folded disposable body warmer that is formed so that it can be used by peeling off the joined edges, and it is provided with sealing crimping portions at both left and right ends of the folded portion of the folded bag body. Air leakage at both ends of the portion (bi-fold portion) can be prevented, and the sealing performance of the bi-fold bag can be made more reliable.
Therefore, without using a packaging bag (exterior bag) or the like, it can be provided as a sealed double-folded disposable body warmer in which the heat generating material does not touch the air until it is used (deployed).

  In addition, the warmer of the present invention is a double-folded disposable warmer that prevents the heat generating material from touching the air until it is in use, and if the bag is widened by peeling off the peripheral edge, the heat generating material generates heat. Can be used. Therefore, no packaging material such as a packaging bag or an exterior sheet is required, and manufacturing can be simplified and cost reduction can be promoted, and the packaging bag can be easily used by simply expanding the folded bag body. In addition, by realizing an extremely simple exterior-less packaging structure that eliminates the need for exterior materials, the generation of waste after use can be greatly reduced, and it can be provided as a disposable warmer that is friendly to the global environment. Play.

Hereinafter, an embodiment of a disposable body warmer according to the present invention will be described with reference to FIGS.
1 to 3 show a disposable warmer of a first example (hereinafter, simply referred to as “Cairo”), FIG. 1 shows a folded-out exterior-less packaging form, and FIG. 3 shows a developed use form.

  The warmer a in this example is similar to this conventional warmer, in which the heat generating material 1 is enclosed in a flat bag body 2. The heat generating material 1 includes, for example, iron powder, water, vermiculite, activated carbon, A mixed powder in which salts and the like are mixed, and reacts with oxygen to generate heat. 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 formed into a substantially flat bag shape by thermocompression bonding with a seal strength (joining strength) of about 20 N / 25 mm to form a hardly peelable joint 5.

  The breathable sheet 3 is a porous breathable film layer whose inner layer (bonding surface with the non-breathable sheet 4) is made of a low-density polyethylene film, and on the outermost layer (surface layer inside the bag body 2). In the easy peel film, a plurality of needle holes for ensuring a predetermined air permeability are formed.

  The non-breathable sheet 4 is a non-peelable joining layer whose innermost layer (joining surface with the breathable sheet 3) is made of a low density polyethylene film, and a barrier layer made of vinylidene chloride film or the like is laminated thereon. The laminated sheet is formed by laminating a non-breathable layer made of a polypropylene film as an outermost layer (a surface layer on the outer side of the bag body 2).

  The peripheral portions of the breathable sheet 3 and the non-breathable sheet 4 are thermocompression bonded at a predetermined temperature and a predetermined pressure, so that the hardly peelable bonding layers (low density polyethylene films) that are the innermost layers of each other can be obtained. Bonding is performed with a sealing strength of about 20 N / 25 mm, thereby forming a non-peelable bonding portion 5 to form the bag body 2.

  As shown in FIGS. 1 and 2, the bag body 2 is folded at the center portion so that the air permeable sheet 3 is inside, and is folded in two, and the edges facing each other excluding the bent portion 6 of the air permeable sheet 3 The parts are joined to each other in a peelable manner to form a hermetically sealed outer packaging, and the joined edges in the folded bag body 2 ′ are peeled apart and used.

  That is, the mutually facing edges of the air-permeable sheet 3 of the folded bag body 2 ′ 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. The edges of the film) are joined with a seal strength (peel strength) of about 10 to 17 N / 25 mm, thereby forming an easily peelable joint 7, resulting in a folded bag 2 ′ shown in FIG. 1. From this state, the easily peelable joining portion 7 can be easily peeled off and deformed into the unfolded bag 2 shown in FIG.

Sealing and crimping portions 10 that prevent the inflow of air from both ends of the folded portion 6 of the folded bag body 2 ′ are formed at the left and right ends.
The sealing and crimping part 10 has a sealing strength similar to that of the non-peelable joining part 5 at the left and right ends of the folded part 6 in the bag body 2 ′ in the form of a two-fold exterior-less packaging. It is formed by secondary thermocompression bonding.

  In this way, by sealing the left and right ends of the folded portion 6 of the bag body 2 ′ in the form of a two-fold exterior-less packaging with the sealing crimping portion 10, at both ends of the folded portion 6, The edges of the breathable sheet 3 are reliably sealed, and the inflow of air from both ends of the bent portion can be prevented.

In this example, the sealing pressure-bonding part (secondary sealing part) 10 is formed in a triangular shape in the region of the aforementioned easily peelable joint part 7 in the folded bag body 2 ′. As in the second example shown in FIG. 4, it may be substantially trapezoidal, or it may be quadrangular or semicircular.
In short, any shape may be used as long as the inflow of air from both ends of the bent portion can be prevented. As in the third to fifth examples shown in FIGS. You may form exceeding.

  In order to ensure sealing at both ends of the bent portion 6, it is preferable that the sealing crimping portion 10 is formed in a wider area, and it is preferable that the band-shaped sealing crimping portion 10 extends over the entire length of the bent portion 6.

  Examples of the band-shaped sealing and crimping portion 10 are shown in FIGS. In this example, a band-shaped sealing crimping portion 10 is formed with the same sealing strength as the non-peelable joining portion 5 over the entire length of the folded portion 6 of the folded bag body 2 ′. The heating material 1 is enclosed in the left and right internal spaces 2a, 2b partitioned by 10, respectively.

  In this way, by forming the band-shaped sealing and crimping portion 10 at the folded portion 6 of the bag body 2, the edges of the air-permeable sheet 3 are more closely adhered and thermocompression bonded at both ends of the folded portion 6. Inflow of air from both ends of the bent portion can be prevented more reliably.

  In addition, the code | symbol 3a in a figure is a porous air permeable film layer which consists of a low density polyethylene film which comprises the inner layer (joint surface with the non-air permeable sheet 4) in the air permeable sheet 3 mentioned above, and the code | symbol 3b is It is an easy peel film as the outermost layer (the inner surface layer of the bag body 2) in the air-permeable sheet 3, and the reference numeral 3c is the above-described needle hole formed in the easy peel film 3b.

  Moreover, in this example, while providing the adhesion layer 20 on the outer side of the non-breathable sheet | seat 4, this adhesive layer 20 is covered with the peeling sheet 21, and use as a warmer to stick is enabled. The aforementioned adhesive layer 20 may be formed at the end of the breathable sheet 3.

  Moreover, in each example mentioned above, the non-joining part 30 at the time of peeling off these edge parts is provided in a part of easily peelable joining part 7 in the folded bag 2 ', and the non-joining part 30 becomes a cue (operation piece) at the time of peeling off the easily peelable joining part 7.

  In each of the illustrated examples, a quadrilateral folded type in which a bag body 2 composed of a rectangular breathable sheet 3 and a non-breathable sheet 4 is folded at the center in the width direction (or length direction). Although a warmer is shown, the shape of the warmer is not limited to this. For example, the bag body 2 composed of the square-shaped breathable sheet 3 and the non-breathable sheet 4 is a triangle-shaped double-folded body that is folded diagonally, or the circular or elliptical breathable sheet 3 and the non-breathable sheet. The bag body 2 composed of 4 can be selected as appropriate, for example, a half-circle or semi-elliptical half-fold type body folded at the diameter portion or the central portion in the length direction.

  As described above, the embodiment of the disposable body warmer according to the present invention has been described with reference to the drawings. However, the present invention is not limited to the illustrated examples, and various types can be used within the scope of the technical idea described in the claims. It goes without saying that changes are possible.

The front view which shows the half-fold packaging form which concerns on the example of embodiment of the disposable body warmer of this invention. The expanded sectional view which follows the (X)-(X) line | wire of FIG. The perspective view which shows the usage pattern of the disposable body warmer in FIG. The perspective view which shows the usage pattern which concerns on the other example of embodiment of the disposable body warmer of this invention. The perspective view which shows the usage pattern which concerns on the other example of embodiment of the disposable body warmer of this invention. The perspective view which shows the usage pattern which concerns on the other example of embodiment of the disposable body warmer of this invention. The perspective view which shows the usage pattern which concerns on the other example of embodiment of the disposable body warmer of this invention. The perspective view which shows the double fold-shaped exterior less packaging form of the disposable body warmer shown in FIG. The expanded sectional view which follows the (Y)-(Y) line | wire of FIG. The expanded sectional view which shows the usage form of the disposable body warmer in FIG. The perspective view which shows the two-fold packaging form in the conventional disposable warmer. The expanded sectional view which follows the (Z)-(Z) line | wire of FIG. The perspective view which shows the case where the tunnel phenomenon arises in the two-fold form of the conventional disposable warmer.

Explanation of symbols

a: Disposable body warmer 1: Heat-generating material 2: Bag body (development state is shown)
2 ': Bag body (shows a folded state)
3: Breathable sheet 3b: Easy peel film 4: Non-breathable sheet 5: Difficult peelable joint 6: Bending part 7: Easy peelable joint 10: Sealing pressure bonding part

Claims (9)

  A bag body (2) having a flat bag shape in which the peripheral portions of the breathable sheet (3) and the non-breathable sheet (4) are joined with difficulty peelability and encapsulating the heat generating material (1) therein, The air-permeable sheet is folded at the center so that the air-permeable sheet is inside and folded into two, and the edges facing each other excluding the folded portion (6) in the folded bag (2 ') are easily peelable. A two-fold mold that forms a sealed outer-less packaging form joined together, and is used by separating the edges joined with the easy peelability in the two-fold bag body (2 ') in an unfolded form The disposable crimper is a sealed crimping part (10) for preventing the inflow of air from both ends of the folded part (6) of the folded bag (2 '). Disposable caps characterized in that B.   The sealing crimping part (10) is formed by thermocompression bonding of the left and right ends of the folded part (6) in the bag body (2 ′) in the form of the two-fold exterior-less packaging. The disposable body warmer according to claim 1, wherein the disposable body warmer is provided.   The said sealing crimping | compression-bonding part (10) is formed in the area | region of the edge part joined with the said easy-release property in the said half-folded bag (2 '). Disposable body warmer as described in 1.   The said sealing crimping | compression-bonding part (10) is formed beyond the area | region of the edge part joined with the said easy-releasability in the said half-folded bag (2 '). Disposable body warmer of 2.   The disposable body warmer according to claim 1 or 2, wherein the sealing crimping part (10) is formed over the entire length of the folded part (6) in the folded bag body (2 '). .   The said sealing crimping part (10) is formed in strip shape over the full length of the said bending part (6) in the said half-folded bag (2 '), and it partitions off with this strip | belt-shaped sealing crimping part (10) The disposable body warmer according to claim 1 or 2, wherein the heat generating material (1) is enclosed in the left and right internal spaces (2a, 2b).   The air-permeable sheet (3) is made of an easy peel film that is joined with easy peelability when the edges of the air-permeable sheet facing each other are thermocompression bonded. Disposable body warmer in any one.   The non-joining part (30) at the time of peeling off these edge parts is formed in a part of edge parts joined with the said easy-release property in the said bi-fold bag body (2 '). The disposable body warmer according to any one of claims 1 to 7.   The disposable body warmer according to any one of claims 1 to 8, further comprising an adhesive layer (20) covered with a release sheet (21) on the inside or outside of the bag (2).

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