JPWO2010090181A1 - Thermal packaging material for application and thermal material using the same - Google Patents

Abstract

A packaging material for forming a bag for containing a heat-generating composition, which does not require a release paper and does not have various disadvantages of the conventional pasting means for the pasting thermal material, and uses the same We provide thermal materials for pasting. The packaging material of the present invention is a packaging material for forming a bag body for containing a heat generating composition, and (A) a member constituting a heat generating composition housing portion of the bag body when the bag body is formed. The surface itself has no pressure-sensitive adhesive layer, and is made of a resin film having a release treatment region and a non-release treatment region on the outer surface of the bag, and the non-release treatment region is at least a peripheral portion. And (B) an adhesive member made of a base sheet having an adhesive layer on one side, and the adhesive layer of the adhesive member is covered with a release treatment region of the main member. It is characterized in that it can be peeled off from the release treatment region and attached to the adherend.

Description

  The present invention relates to a packaging material for forming a bag for containing a heat generating composition used for manufacturing a thermal material for application, and a thermal material for application using the same.

  A thermal material including a breathable bag that contains a heat generating composition that generates heat upon contact with air is generally widely used as a medical device for reducing pain due to thermal heat, a warmer for warming, and the like. As such a thermal material, a thermal material for pasting, such as a so-called “pasting type” disposable warmer or a medical thermal material, which is used by being pasted on the body or clothing, is well known.

  Most commonly, the thermal material for application can be applied to clothing or skin by providing a suitable pressure-sensitive adhesive layer on the outer surface of the bag. However, since the heat-generating composition gradually hardens with heat generation or the adhesive strength decreases due to sweating due to heat generation, the heat-sensitive material becomes uncomfortable, the adhesiveness of the heat-sensitive material to the human body deteriorates, and the heat-sensitive material partially peels off There was a problem of falling or falling. Furthermore, when the part in contact with the pressure-sensitive adhesive is heated, redness, rash and the like are likely to occur, and there is a problem in terms of safety. In addition, there is a problem of so-called adhesive residue, in which a pressure-sensitive adhesive softened by heating the pressure-sensitive adhesive bites into clothing.

  In addition, the pressure-sensitive adhesive layer is usually covered with a release paper (also referred to as a separator or release paper) during storage. In use, the pressure-sensitive adhesive layer is peeled off to expose the pressure-sensitive adhesive layer, and a thermal material is applied. On the other hand, since the peeled release paper is discarded as it is, it is desired not to use the release paper from the viewpoint of cost reduction and environmental protection.

  In order to solve such problems and improve the safety to the human body and the comfortable feeling of use, for the thermal material for sticking, various improvements to sticking means such as an adhesive and the nonwoven fabric on the surface of the packaging material Has been proposed.

  In particular, interest has recently increased regarding a thermal material for sticking that does not require a release paper. For example, in Japanese Patent Application Laid-Open No. 6-1000084 (Patent Document 1), a pressure-sensitive adhesive sheet provided so that a pressure-sensitive adhesive layer and a release material layer are adjacent to each other on one side of a base material is attached to a bag body on the back side. In addition, there is described a thermal material for sticking which is stored in a folded state so that the pressure-sensitive adhesive layer and the release agent layer face each other. Japanese Patent Application Laid-Open No. 2008-284271 (Patent Document 2) discloses that a pressure-sensitive adhesive layer and a release treatment layer are directly applied on a base material so as to overlap when folded. A packaging material for a bag and a warmer using the same are described. Japanese Patent Application Laid-Open No. 2008-301935 (Patent Document 3) has an adhesive member that is fixed to the outer edge base material of the bag body and is provided so that the adhesive layer and the release treatment layer are in contact with each other in a folded state. A disposable body warmer is described. In JP 2009-159 A (Patent Document 4), the two-folded sticking member as described above is fixed to the bag body, and the sticking edge is provided on the sticking member, so that the thermocompression bonding allowance on the outer periphery of the bag body is provided. A disposable body warmer is described in which a peeling edge is applied to the picking edge of the overlapping portion.

  Although the thermal material having the above-mentioned sticking member has been improved in that a release paper is not used, all of them require a new member, the manufacturing process becomes complicated, and the sticking member is a bag before use. It has drawbacks such as protruding from the body body.

Japanese Patent Laid-Open No. 6-100903 JP 2008-284271 A JP 2008-301935 A JP 2009-159 A

  The present invention does not require a release paper, and does not have various drawbacks about the conventional pasting means for the pasting thermal material as described above, and a packaging material for forming a heat generating composition-containing bag body, And it aims at providing the thermal material for sticking using this.

According to the present invention,
[1] A packaging material for forming a bag for containing a heat generating composition,
(A) A member that constitutes the heat generating composition housing portion of the bag body when the bag body is formed, and does not have an adhesive layer on the surface of the bag body, but is released from the surface on the outside of the bag body It consists of a resin film having a treatment region and a non-mold release treatment region, and the non-mold release treatment region is at least a main member present in the peripheral portion,
(B) including a sticking member made of a base sheet having a pressure-sensitive adhesive layer on one side, and the pressure-sensitive adhesive layer of the sticking member is covered with a release treatment region of the main member, and a release treatment region Can be peeled off and affixed to the adherend,
Packaging material characterized by:
[2] The packaging material according to [1], wherein there are two or more sticking members;
[3] The packaging material according to the above [1] or [2], wherein a surface of the main member which is the inner side of the bag body has a layer formed of a heat-sealable resin at least at a peripheral edge portion;
[4] The packaging material according to any one of [1] to [3], wherein an area of the sticking member is equal to or less than an area of the main member;
[5] Any of the above [1] to [4], wherein the main member has a portion not covered with the sticking member, and a portion not covered with the sticking member is covered with the buffer member. The packaging material according to claim 1;
[6] The exothermic composition-accommodating bag having the surface facing the adherend formed by the packaging material according to any one of [1] to [5], and the exothermic composition accommodated in the bag A heating material for sticking, which is used by sticking the adhesive layer of the sticking member to an adherend;
[7] The thermal material for sticking according to [6], wherein a non-release treatment region at a peripheral portion of the packaging material is bonded with a width equal to or less than a width of the peripheral portion of the bag body;
[8] The thermal material for pasting according to [6] or [7], wherein the packaging member sticking member is fixed to a non-release treatment region at a peripheral portion of the main member of the packaging material;
[9] The thermal material for sticking according to any one of [6] to [8], which is accommodated in an airtight outer bag;
[10] The method for producing a packaging material according to any one of [1] to [5],
(1) A step of performing a mold release treatment on the other portions, leaving peripheral portions corresponding to two opposing sides on at least one surface of the resin film of the main member,
(2) a step of applying a pressure-sensitive adhesive to almost the entire surface of the substrate sheet excluding a portion corresponding to a portion not subjected to the release treatment of the resin film to form a pressure-sensitive adhesive layer; and (3) the pressure-sensitive adhesive. Including a step of superposing an agent layer on a part of the resin film which has been subjected to a mold release treatment;
[11] The method according to [10], further comprising a step of slitting or perforating the base sheet in the center of the two opposite sides immediately before the step (3) in parallel with these sides. ;
[12] A bag for containing a heat generating composition by overlapping the packaging material according to any one of [1] to [5] above with a breathable or non-breathable packaging material and bonding a peripheral edge portion. And a step of fixing the sticking member to the main member and a step of encapsulating the exothermic composition in the bag body are provided.

  The packaging material of the present invention is advantageous in terms of production technology, quality control, and economic efficiency because it can be easily manufactured by the same manufacturing equipment as in the prior art, with fewer process changes than in the past. Moreover, since it is not necessary to use a release paper, it is further advantageous in terms of manufacturing cost, and also reduces the amount of waste discarded during use, which is also advantageous from the viewpoint of environmental protection.

  Furthermore, the thermal material using the packaging material of the present invention can be easily manufactured as before without changing the manufacturing process and the manufacturing equipment, by using the packaging material of the present invention instead of the conventional packaging material. Can do.

  Moreover, since the sticking member does not protrude outside the size of the bag body before use, the shape during storage is simple, there is no step caused by the folded sticking member, and it is compact. It can be expanded to double the size. For this reason, although the manufacturing cost is low, the size of the thermal material can be felt larger than the actual size, and a good impression can be given to the user.

  Also in terms of safety, there is no adhesive in the part of the bag that generates heat due to the exothermic composition, and the adhesive is heated, causing the thermal material to fall off or peel off during use due to sweating, and further the adhesive It is possible to reduce the occurrence of unpleasant symptoms such as rash, redness and itching due to ingredients. Moreover, since adhesive residue can also be prevented, it is not necessary to design an adhesive with a high degree of difficulty in consideration of high temperature characteristics.

FIG. 1 is a view showing an example of the structure of a packaging material according to the present invention together with a cross section as viewed obliquely from above. FIG. 2 is a cross-sectional view showing an example of the structure of the packaging material of the present invention. FIG. 3 is a view showing a cross section of another example of the structure of the packaging material of the present invention. FIG. 4 is a diagram showing a transverse cross section of the thermal material using the packaging material of the mode shown in FIG. FIG. 5 is a diagram showing a cross section of another example of the structure of the packaging material of the present invention. FIG. 6 is a diagram showing a cross section of the thermal material using the packaging material of the aspect shown in FIG. 5 in a state where the pressure-sensitive adhesive layer is developed and peeled from the mold release region.

Packaging The packaging material of the present invention is a packaging material that constitutes a bag body for containing a heat generating composition, and basically includes a main member (A) and a sticking member (B). In general, a bag for containing a heat generating composition is composed of a packaging material (hereinafter also referred to as a “back wrapping material”) constituting a surface on the adherend side and a packaging material (hereinafter referred to as “outside air side”) constituting the surface on the opposite side And is formed so that at least one surface has air permeability. The packaging material of the present invention can be used as a packaging material constituting the surface on the adherend side.

(A) Main member The main member of the packaging material of this invention is a member which comprises the part which accommodates a heat-generating composition, when a bag is formed. Therefore, in the thermal material, the main member comes into contact with the heat generating composition with one side being the outside of the bag and the other side being the inside. In the present invention, an adhesive layer for attaching the bag body to the adherend need not be provided on the main member.

  The main member is basically made of a resin film, and there is no particular limitation on the material, thickness, configuration, etc. as long as it is suitable for forming a heat generating composition-containing bag body. For example, the film may be a non-porous film (such as a non-breathable or non-porous film) or a breathable film (such as a perforated or porous film), and the film itself may be a single layer. It may be a laminate. It should be noted that the meanings of the terms “film” and “sheet” in the present invention are not strictly distinguished by, for example, thickness, configuration, etc., and are used as terms interchangeable with each other.

  As the resin constituting the film, generally, polyethylene, polypropylene, polyester, polyamide, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, polyurethane, polystyrene, ethylene-vinyl acetate copolymer, polycarbonate, hydrochloric acid rubber or the like alone or in combination Is mentioned.

  When forming the bag body, the front wrapping material and the back wrapping material are bonded together, and this is currently generally performed by heat sealing. Therefore, in order to manufacture a bag body using the existing thermal material manufacturing equipment as it is, the surface on the inner side of the bag body and in contact with the heat generating composition (the surface to be bonded to the other packaging material) is heated. It is preferably formed of a resin that can be sealed. The heat-sealable resin layer may be provided only at the peripheral portion to be heat-sealed. Such heat-sealable resins are known, and particularly preferable ones include polyethylene produced using a single site catalyst.

  The thickness of the film is not particularly limited, but is generally about 5 to 200 μm, and preferably about 20 to 100 μm.

  The film constituting the main member is partially subjected to a mold release treatment on the surface that is the outside of the bag. Therefore, it is necessary to be a film that can be released. Since the base material sheet of the sticking member is further fixed to this surface, properties such as heat sealability may be required depending on the fixing method used at that time.

The release treatment of the resin film can be performed by a known arbitrary method using a known release agent. For example, examples of the release agent include silicone release treatment agents, waxes, fats and oils (oil agents), metal salts, and the like, and any of them may be used as long as it has releasability. The silicone release treatment agent may be either an addition reaction type or a condensation reaction type, and can be applied after being diluted with an organic solvent or water in the same manner as the pressure-sensitive adhesive. An application amount of the release agent is, for example, about 0.1 to 2.0 g / m ² is sufficient.

  In the mold release process, there is an area (release process area) that has been subjected to the release process and an area that has not been subjected to the release process (non-release process area) on one side of the resin film (the outer surface of the bag). As described above, it is not partially applied to the entire surface of the resin film, but is partially applied except at least part of the peripheral edge. The non-release treatment region at the peripheral portion serves as an adhesive fixing portion of the sticking member, while the release treatment region serves to protect the surface of the pressure-sensitive adhesive layer until it is attached to the adherend. Therefore, it is preferable that a mold release process area | region is a position and magnitude | size which can coat | cover the adhesive layer of a sticking member completely except a peripheral part. Further, for example, in the case of a typical quadrilateral bag body, the non-release processing region is provided with an appropriate width at least in a peripheral portion corresponding to a portion where the sticking member is fixed. It is preferable that there are two or more sticking members for stable sticking of the thermal material, for example, it is preferably provided at the positions of two or four sides facing each other on the main member, and the non-release processing region is accordingly provided. Provided.

  If the width of the non-release agent treatment region at the peripheral edge is too wide, the fixing part of the sticking member protrudes after the sticking to the adherend when using the thermal material, and friction with the clothing occurs or the thermal material peels off. Alternatively, it may be a cause of falling, so that the narrower one is preferable, and the width is preferably the same as or smaller than the fixing portion of the sticking member. For the same reason, this width is preferably narrower than the bonding width between the packaging materials as compared to the bonding width between the packaging materials for forming the bag.

  In addition, the non-release agent treatment area | region may be provided in addition to a peripheral part. For example, as will be described later, such a region may be provided between the adhesive members that face each other, and another sheet (buffer member) may be bonded and fixed to the region (FIGS. 5 and 6).

(B) Affixing member The affixing member of the packaging material of the present invention is a member for affixing a bag containing an exothermic composition to an adherend after forming the bag, and is basically a base sheet. And a pressure-sensitive adhesive layer provided thereon. The sticking member is detachably bonded to the main member by an adhesive layer. One end of the sticking member is fixed to the main member when the bag is formed. Since the other end of the sticking member is not fixed to the main member, the sticking member can be unfolded and the pressure-sensitive adhesive layer that has been covered by the base sheet can be stuck to the adherend.

  As long as the base sheet functions as a support for the pressure-sensitive adhesive layer and can be fixed to the resin film of the main member, it may be a single layer or a multilayer, and may be breathable or non-breathable. Although it does not specifically limit, a different property is calculated | required according to the fixing method to the resin film of a main member.

  For example, when the base sheet is a single-layer sheet and is adhered and fixed to a resin film by heat sealing, the adhesive passes to the back of the base when applying the adhesive to function as a support for the adhesive. Those having a thickness or density that can prevent the occurrence of so-called “back-through” are suitable. Moreover, in order to adhere | attach to a resin film, what can be heat sealed with the resin film of a main member, and the thing which does not melt-fix to a heat seal bar is preferable. Further, the pressure-sensitive adhesive layer is peeled off from the resin film so as to be attached to the adherend during use, and it is preferable that the pressure-sensitive adhesive layer has a firmness, firmness and strength that can be easily peeled off. In addition to the above, a low molecular weight component such as a plasticizer in the pressure-sensitive adhesive migrates to the base sheet over time, which may cause formation of wrinkles due to swelling of the base sheet and a decrease in adhesive strength. It is desirable to be able to prevent wrinkle formation and decrease in adhesive strength due to swelling over time.

Examples of such a single layer sheet include a nonwoven fabric, a film, and a foam film. More specifically, examples of the polyolefin-based nonwoven fabric include a polypropylene nonwoven fabric, a polyethylene nonwoven fabric, and a composite nonwoven fabric of polypropylene and polyethylene. Moreover, as a manufacturing method of a nonwoven fabric, there exist a spun lace, a spun bond, a melt blown, a thermal bond, etc., Any may be sufficient. These are excellent in that they can be heat-sealed with a resin film at a low melting point and do not melt and adhere to the heat seal bar.
Alternatively, an arbitrary sheet may be provided with an anti-adhesion coating only on the heat seal side so as not to melt and adhere to the heat seal bar.

  In addition, when it is a two-layer base sheet that is adhesively fixed to a resin film by heat sealing, the side that is adhesively fixed to the resin film (the side on which the pressure-sensitive adhesive layer is provided) is a polyolefin resin nonwoven fabric, film A layer that can be heat-sealed with a resin film with a low melting point, such as a nonwoven fabric or film of a thermoplastic elastomer, is preferred. This layer can also be partially provided only on the portion (that is, the end portion) that adheres to the resin film.

  On the other hand, since the layer on the opposite side is a layer in contact with the heat seal bar, heat resistance is required, and it is required that the layer does not melt and adhere to the heat seal bar. For example, paper, foamed polyurethane; nylon, rayon, and / or polyester nonwoven fabric or film; aluminum sheet, and high-density polyethylene nonwoven fabric or film having a relatively high melting point are preferable. In addition, it is as having mentioned above about the single layer sheet.

  When it is a base sheet of three or more layers and is adhesively fixed to the resin film by heat sealing, the layer on the side that is adhesively fixed to the resin film (the side on which the pressure-sensitive adhesive layer is provided) and the heat-resistant layer are two layers. Same as the case.

  As these intermediate layers, those satisfying that both layers constituting the surface can be fixed, that the back side of the adhesive is prevented, and that it has sufficient stiffness, elasticity, and strength to be easily peeled off at the time of application are preferable. Those that can prevent wrinkle formation and decrease in adhesive strength over time are preferable. Specifically, examples of the intermediate layer include an extruded laminate sheet of polyolefin resin or thermoplastic elastomer resin, an adhesive or pressure-sensitive adhesive layer mainly composed of polyolefin or thermoplastic elastomer, and a melt blown nonwoven fabric having a high fiber density. It is done.

  When the adhesive member is bonded to the main member by a method other than heat sealing, for example, by using an adhesive, any conventionally used sheet can be used regardless of the performance related to heat sealing. . For example, if it is a nonwoven fabric, it can be selected from materials such as nylon, rayon, polyester, vinylon, acetate, acrylic, polyethylene, and / or polypropylene, and the manufacturing method is nonwoven fabric such as spunbond, thermal bond, spunlace, etc. There may be a single layer or a stacked layer. In addition, films of materials such as polyethylene, polypropylene, nylon, and / or polyester, paper, aluminum sheets, foamed polyurethane, artificial fibers such as polyvinyl chloride, cloth such as cotton, hemp, silk, or laminates of these Can be used.

When used as such a substrate sheet or a component thereof, the weight per unit is generally about 10 to ²⁰⁰ g / m ² , preferably about 15 to 100 g / m ² , and if the film is a film, the thickness is 5 to 5 g / m ^2. The thickness is about 200 μm, preferably about 20 to 100 μm. In the case of a foamed resin (such as foamed polyethylene), a thickness of about 1 to 5 mm is preferable.

An adhesive layer is formed on one side of the base sheet. As the pressure-sensitive adhesive used for forming the pressure-sensitive adhesive layer, any known pressure-sensitive adhesive can be used. In general, a pressure-sensitive adhesive used for sticking a thermal material to clothing or a human body is preferable. In particular, a hot-melt type pressure-sensitive adhesive that does not require drying of moisture and solvent after lamination and can be used for manufacturing a packaging material at low cost with a compact facility is preferable.
This pressure-sensitive adhesive layer may be provided on the entire surface including the peripheral portion of the base sheet, or the peripheral pressure-sensitive adhesive layer may be used for adhesion between the base sheet and the resin film.

  The sticking member is stored in a state where a portion of the pressure-sensitive adhesive layer used for sticking to the adherend is covered with a release treatment region of the main member. Therefore, the area of the pressure-sensitive adhesive layer is desirably the same as or smaller than the area of the release treatment region, and the area of the sticking member is desirably equal to or smaller than the area of the main member. When the area of the affixing member is configured to be significantly smaller than the area of the main member, a flexible sheet, such as a non-woven fabric having the same thickness as that of the affixing member, is provided on a portion of the main member that is not covered with the affixing member. Is preferably laminated as a buffer member (FIGS. 5 and 6). By doing so, a portion protruding from the bag body cannot be formed during the storage of the thermal material, and the thermal material surface can be stored in a compact form with no step. Furthermore, since the portion where the resin film of the main member is directly exposed is eliminated or reduced, the feel during use can be improved. Moreover, since the area to be peeled and developed becomes small, it becomes easy to peel and deploy.

Production of packaging material The packaging material of the present invention can be produced, for example, as follows. A mold release process is performed on the other portions of the resin film, leaving at least one peripheral portion corresponding to two opposing sides on at least one side. Apply adhesive to almost the entire surface of the base sheet excluding the part corresponding to the part that has not been released from the resin film, and overlay this adhesive layer with the part that has been released from the resin film. Match.
In addition, immediately before superimposing with the resin film, two adhesive members are formed by slitting the base sheet in parallel with these sides at the center of the two opposite sides to which the adhesive member is bonded at the time of manufacturing the thermal material. The adhesive member can be developed on both sides from the slit. The slit may be perforated.

The bag for accommodating a heating material exothermic composition can be manufactured by using the packaging material of the present invention on one side and adhering a breathable or non-breathable packaging material usually used in this technical field and a peripheral portion. it can. The thermal material can be basically manufactured by enclosing a known exothermic composition, which is usually used in this technical field and generates heat upon contact with oxygen in the air, in a bag.

  In general, the manufacture of the bag and the manufacture of the thermal material are continuous. First, the remaining three sides are bonded with heat seal or adhesive, leaving one side of the wrapped packaging, and heat is generated from the open side. After the composition is charged, this side is also bonded, and the exothermic composition is sealed. At the time of bonding of the packaging materials, the sticking member is also fixed to the main member. Additional elements can be added to the thermal material as needed.

Production Example 1 (wrapping material)
The packaging material of the present invention having the configuration shown in FIG. 1 was produced as follows. Polypropylene (PP) · Polyethylene (PE) composite thermal bond nonwoven fabric (basis weight 30 g / ^{m 2)} substrate sheet styrene - isoprene - styrene (SIS) based hot melt adhesive of 50 g / ^{m 2} was applied, the base sheet A slit was formed in the central portion in the flow direction, and the linear low density polyethylene (LLDPE) film (thickness: 60 μm) was superposed on the surface subjected to the mold release treatment leaving the peripheral portions corresponding to the two opposite sides of the resin film.
In this example, the release treatment region on the main member is provided on the whole except for the peripheral edge portions at both ends, and has almost the same area as the pressure-sensitive adhesive layer (FIG. 1).

Production Example 2 (wrapping material)
A packaging material of the present invention was produced basically in the same manner as in Production Example 1. However, in this example, the pressure-sensitive adhesive layer is provided on the entire surface including the peripheral portion and is designed to be used for fixing the sticking member to the main member (FIG. 2).

Production Example 3 (wrapping material)
A packaging material of the present invention was produced basically in the same manner as in Production Example 1. However, in this example, a portion corresponding to the bottom of the slit of the base material sheet of the sticking member is provided with a portion having a width of about 5 mm and no adhesive layer. Therefore, the area of the pressure-sensitive adhesive layer is smaller than the release treatment region on the main member. By comprising in this way, it becomes easy to grasp the slit part of a base material sheet at the time of use, and it becomes easy to peel and expand | deploy a sticking member from a main member (FIG. 3).

Production Example 4 (thermal material)
Production Example 3 using the packaging material of Production Example 3 on one side and a breathable membrane of polyethylene terephthalate (PET) spunlace nonwoven fabric (40 g / m ² basis weight) and PE porous film (50 μm thick) laminated on the other side The LLDPE film surface of the packaging material 3 and the PE porous film surface of the breathable membrane are overlapped, and the remaining three sides are heat sealed with a 6 mm width heat seal roll, and the heat generation composition starts from the open side After filling the product, this side was also heat-sealed and punched out with a die cut roll to produce a thermal material having a length of 100 mm and a width of 134 mm. The adhesive member was also melted and fixed during heat sealing.
A cross-sectional view of the thermal material thus manufactured is shown in FIG. The upper packaging material in the figure is the packaging material of Production Example 3. FIG. 4 shows a state where the sticking member is unfolded when the thermal material is used.

Production Example 5 (wrapping material)
A packaging material according to another embodiment of the present invention is shown in FIG. This packaging material is composed of three layers of PP / PE composite thermal bond nonwoven fabric (weight per unit 20 g / m ² ) / extruded low density polyethylene (LDPE) (thickness 8 μm) / PP · PE composite spunbond nonwoven fabric (weight per unit 15 g / m ² ). the PP · PE composite spun bonded nonwoven fabric surface of the substrate sheet, the SIS-based hot melt adhesive 50 g / m ² was applied, a slit in the flow direction center portion of the substrate sheet, LLDPE film (60 [mu] m thick) resin film The surface was overlapped with the surface subjected to the mold release treatment, leaving the peripheral portions corresponding to the two opposite sides.

  In this example, the area of the pressure-sensitive adhesive layer is narrower than in other examples, and is partially provided on the base sheet. Furthermore, the area of the sticking member is also designed to be smaller than the main member. The non-release treatment region on the main member is provided not only at the peripheral portions at both ends but also at the portion corresponding to the center, and the non-release treatment region at the center that is not covered with the adhesive member (buffer member) ) Is adhered. Both ends of this nonwoven fabric are bonded, but the other portions are not bonded, and a space is formed between the nonwoven fabric and the resin film. By doing so, flexibility is excellent.

Production Example 6 (thermal material)
A thermal material was produced in the same manner as in Production Example 4 except that the packaging material of Production Example 5 was used on one side instead of the packaging material of Production Example 3 (FIG. 6). When this thermal material is peeled and deployed from the main member during use of the thermal material, as shown in FIG. 6, the non-woven fabric part remains in the center, and most of the part that comes into contact with the adherend becomes a non-woven fabric. Good touch when used. In addition, since the area to be peeled and spread becomes small, it is easy to peel and spread.

  This application is based on Japanese Patent Application No. 2009-023831 filed on Feb. 4, 2009, and all the contents described in the specification and claims of Japanese Patent Application No. 2009-023831 Included in the application specification.

DESCRIPTION OF SYMBOLS 1 Back wrapping material 2 Front wrapping material 3 Resin film 4 Mold release process area 5 Non-mold release process area 6 Base material sheet 7 Adhesive layer 8 Adhesive part of an adhesive member and a resin film 8 'Adhesion of an adhesive member and a resin film Planned part 9 Adhesive part of back wrapping material and front wrapping material 10 Slit (or perforation)
11 Exothermic composition 12 Space 13 Buffer member (nonwoven fabric)
14 Adhesive

Claims (12)

A packaging material for forming a bag for containing an exothermic composition,
(A) A member that constitutes the heat generating composition housing portion of the bag body when the bag body is formed, and does not have an adhesive layer on the surface of the bag body, but is released from the surface on the outside of the bag body It consists of a resin film having a treatment region and a non-mold release treatment region, and the non-mold release treatment region is at least a main member present in the peripheral portion,
(B) including a sticking member made of a base sheet having a pressure-sensitive adhesive layer on one side, and the pressure-sensitive adhesive layer of the sticking member is covered with a release treatment region of the main member, and a release treatment region Can be peeled off and affixed to the adherend,
A packaging material characterized by   The packaging material according to claim 1, wherein there are two or more sticking members.   The packaging material according to claim 1 or 2, wherein the inner surface of the bag of the main member has at least a layer formed of a heat-sealable resin at a peripheral edge.   The packaging material of any one of Claims 1-3 whose area of the said sticking member is below the area of the said main member.   The packaging material according to any one of claims 1 to 4, wherein the main member has a portion not covered with a sticking member, and a portion not covered with the sticking member is covered with a buffer member. .   A surface facing the adherend includes a heat generating composition housing bag formed by the packaging material according to any one of claims 1 to 5, and a heat generating composition housed in the bag, A thermal material for sticking, which is used by sticking the adhesive layer of the sticking member to an adherend.   The thermal material for sticking according to claim 6, wherein a non-release treatment region at a peripheral portion of the packaging material is bonded with a width equal to or less than a width of the peripheral portion of the bag body.   The thermal material for sticking according to claim 6 or 7, wherein the sticking member of the packaging material is fixed to a non-release treatment region at a peripheral portion of the main member of the packaging material.   The thermal material for sticking of any one of Claims 6-8 accommodated in an airtight outer bag. A method for producing the packaging material according to any one of claims 1 to 5,
(1) A step of performing a mold release treatment on the other portions, leaving peripheral portions corresponding to two opposing sides on at least one surface of the resin film of the main member,
(2) a step of applying a pressure-sensitive adhesive to almost the entire surface of the substrate sheet excluding a portion corresponding to a portion not subjected to the release treatment of the resin film to form a pressure-sensitive adhesive layer; and (3) the pressure-sensitive adhesive. A method comprising superposing an agent layer on a portion of the resin film subjected to a release treatment.   The manufacturing method of Claim 10 which further includes the process of putting a slit or a perforation in a base material sheet in the center of the said two opposing sides immediately before the said process (3) in parallel with these sides. The packaging material according to any one of claims 1 to 5 and the breathable or non-breathable packaging material are overlapped, and a peripheral portion is adhered to form a bag for containing a heat generating composition and the sticking The manufacturing method of the thermal material for sticking characterized by including the process of fixing a member to a main member, and the process of enclosing a heat-generating composition in this bag.

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