JP2007168838A - Heat-generating-item package and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily seal a bag base material in sealing parts, to improve the speed of a manufacturing line, and to allow an adhesive to be applied as far as the edges of the adhesive face of a heat generating item by a transfer system in the case of an adhesive type. <P>SOLUTION: A heat generating item 1 is sealed in an outer bag 3 tightly closed by the sealing parts 11. In the base material 8 of the outer bag 3, a hot-melt adhesive 13 is applied, via a releasable layer 12, to a portion 40 corresponding to the stuck face 7 of the heat generating item 1 and portions 41 corresponding to the sealing parts 11 outside the portion 40. The bag base material 8 is sealed with the hot-melt adhesive 13 on the portions 41. The hot melt adhesive 13 on the portion 40 is transferable to the stuck face 7. The bag base material 8 is biaxially-oriented polypropylene film coated with an oxygen permeability control material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a heating element enclosing material in which a heating element such as a disposable body warmer is sealed in an outer bag, and a method for manufacturing the same.

  A heating element used as a disposable body warmer is configured by accommodating a heating powder containing iron powder or the like or a heating sheet in which the heating powder is supported by a supporting fiber body in a bag. The heating element is hermetically sealed in an outer bag made of an airtight bag base material. The outer bag is opened during use to take out the heating element.

  In a conventional outer bag, a front base material and a back base material having airtightness are heat-sealed by a seal portion on the outer periphery thereof. For example, when using a biaxially stretched polypropylene film coated with an oxygen permeable control material as the front and back substrates, a polyethylene film is laminated inside the biaxially stretched polypropylene film to generate heat. In the sealing step after wrapping the body, the outer peripheral portions of the front base material and the back base material are heated from both the front and back surfaces by a heat sealing unit equipped with an embossing roll or the like to heat-seal the polyethylene films.

Further, some conventional outer bags use an easy peel film so that they can be easily opened (Patent Document 1). This outer bag has an easy peel film laminated on the inside of the air barrier film, and the outer periphery of the front and back substrates is heated and sealed from both sides by a heat seal unit in the sealing process. . In the case of the adhesive type, an adhesive layer is provided on the inside of the easy peel film via a release layer, and the adhesive layer is transferred to the back sheet side, which is the adhesive surface of the heating element, when opened. ing.
JP 2001-247165 A

  The conventional outer bag has a drawback that it takes time to heat-seal both base materials at the seal part because the outer peripheral part of the front base material and the back base material is heat-sealed by the heat sealing unit from both front and back sides in the sealing process. . Therefore, it is difficult to increase the speed of the entire production line, and the production speed per row is limited to about 100 to 200 pieces per minute. If the speed is higher than that, there is a defect that a sealing failure occurs. In particular, if the speed is increased, it is necessary to increase the heat temperature of the embossing roll of the heat seal unit according to the speed, so that there is a drawback that the seal portion is likely to be damaged by high heat during heat sealing. In addition, when an easy peel film is used, the easy peel film itself is expensive, and there is a drawback that the manufacturing cost is greatly increased.

  In addition, in order to heat seal the seal part, in the case of the sticking type, it is necessary to prevent the thermal effect on the adhesive layer at the time of sealing, so the adhesive layer is only the central part of the heating element excluding the vicinity of the seal part, The adhesive layer cannot be provided up to the peripheral portion of the sticking surface of the heating element. For this reason, when the heating element is attached to clothing such as underwear through the adhesive layer, the portion without the adhesive layer of the heating element is lifted from the clothing, etc., and is rubbed when the outerwear is worn, etc. There is a problem such as peeling off from the clothes.

  In view of such a conventional problem, the present invention can easily seal the bag base material with the seal portion, and can accelerate the production line speed. It aims at providing the heating element enclosure which can provide an adhesive to the edge part of a sticking surface, and its manufacturing method.

  The present invention relates to a heating element encapsulant formed by enclosing a heating element 1 in an outer bag 3 sealed by a seal portion 11, wherein a bag base material 8 of the outer bag 3 is a hot melt adhesive 13 at the seal portion 11. Is sealed so that it can be opened. On the sticking surface 7 side of the heating element 1 of the bag base material 8, the sticking surface corresponding part 40 corresponding to the sticking surface 7 and the seal part corresponding part 41 corresponding to the seal part 11 on the outside thereof. The hot melt pressure-sensitive adhesive 13 is applied via the release layer 12, the bag base material 8 is sealed by the hot melt pressure-sensitive adhesive 13 of the seal portion corresponding portion 41, and the sticking surface corresponding portion 40 is The hot melt adhesive 13 may be transferable to the sticking surface 7.

  The heating element 1 and the bag base material 8 are folded at the folding parts 34 and 45 with the non-stick surface 6 of the heating element 1 inside, and the bag base material 8 has the hot part 1 on the folding part 45 side. The non-coating area | region 43 where the melt adhesive 13 is not applied may be provided so as to face the folding portion 34 of the heating element 1. Non-coating without the release layer 12 corresponding to the outer periphery of the sticking surface 7 on the seal part 11 side of either the front base material 9 or the back base material 10 of the bag base material 8 There may be a work area 48, and the release layer 12 may be on the other seal part 11 side. There may be an unsealed portion 36 to which the hot melt pressure-sensitive adhesive 13 is not applied outside the seal portion 11 of the bag base material 8. The bag base material 8 may be a biaxially stretched polypropylene film coated with an oxygen permeability control material.

  In another embodiment of the present invention, when manufacturing the heating element enclosure 2 in which the heating element 1 is enclosed in the outer bag 3, the hot melt adhesive 13 is applied to the bag base material 8 having the release layer 12, and then The heating element 1 is wrapped with the bag base material 8 and the seal portion 11 is sealed with the hot melt adhesive 13. The part of the bag base 8 corresponding to the sticking surface 7 of the heating element 1 and the part 41 corresponding to the seal part 11 corresponding to the seal part 11 on the outside through the release layer 12 The hot melt pressure-sensitive adhesive 13 is applied, the seal portion 11 is sealed with the hot melt pressure-sensitive adhesive 13 of the seal portion corresponding portion 41, and the hot melt pressure-sensitive adhesive 13 of the sticking surface corresponding portion 40 is You may adhere to the sticking surface 7. FIG.

  The hot melt pressure-sensitive adhesive 13 is applied to the bag base material 8 except for the non-coating region 43 corresponding to the folded portion 34 of the heating element 1, and the folded portion is formed on the hot melt pressure-sensitive adhesive 13. 34 is made to correspond to the non-coating region 43, and the heating element 1 is overlapped, and the folding element 34, the heating element 1 and the bag base material 8 with the non-sticking surface 6 of the heating element 1 inside. It may be folded at 45.

  According to the present invention, the bag base material can be easily sealed at the seal portion, and the speed of the production line can be accelerated. In the case of the sticking type, the sticking surface is adhered to the end of the heating element sticking surface. There is an advantage that an agent can be provided.

  Embodiments of the present invention will be described below in detail with reference to the drawings. 1-5 illustrate a first embodiment of the present invention. 1 and 2 show a heating element enclosure 2 when the heating element 1 is a non-stick type disposable body warmer. The heating element enclosure 2 encloses the heating element 1 and the heating element 1 in a sealed manner. An outer bag 3 is provided.

  The heating element 1 is a non-stick type disposable body warmer, and contains a heating powder 4 in which iron powder or other powder is mixed or a heating sheet in which the heating powder 4 is supported by a supporting fiber body in a bag body 5. The bag body 5 is configured by sealing the outer peripheral portions of the top sheet 6 on the front side and the back sheet 7 on the back side. One or both of the top sheet 6 and the back sheet 7 are air permeable, and the exothermic powder 4 is brought into contact with air by the air permeable action, and heat is generated by the chemical reaction.

  In addition, the synthetic resin film, the nonwoven fabric, etc. are used for the top sheet 6 and the back sheet 7 for one or both. In the case of using a synthetic resin film, air permeability is imparted by forming a large number of small holes.

The outer bag 3 seals the bag base material 8, for example, the front base material 9 and the back base material 10 corresponding to the front and back of the heating element 1, and the outer peripheral portions of both base materials 9 and 10 in a sealed manner on the entire circumference in the circumferential direction. The heating element 1 is hermetically sealed inside. For the bag base material 8 constituting the front base material 9 and the back base material 10, for example, a biaxially stretched polypropylene film coated with an oxygen permeability control material is used. The biaxially stretched polypropylene film coated with this oxygen permeability control material preferably has an oxygen permeability and a moisture permeability of 10 cc / m ² and 2 g / m ² day or less.

  One of the front substrate 9 and the back substrate 10, for example, the back substrate 10, is formed with a release layer 12 having a release agent such as a silicon liquid applied on the entire surface thereof as shown in FIG. In addition, a hot melt pressure-sensitive adhesive 13 is applied to the entire circumference in the circumferential direction via a release layer 12 at a portion corresponding to the seal portion 11 on the outer peripheral side of the heating element 1. A release layer is not formed on the front substrate 9. Both base materials 9 and 10 are sealed with a hot melt pressure-sensitive adhesive 13 at the seal portion 11, and when opened, the hot-melt pressure-sensitive adhesive 13 remains on the front base material 9 side, and the back base material 10 is hot-melt pressure-sensitive adhesive. It can be opened by peeling from the agent 13.

  It is sufficient that the release layer 12 of the back substrate 10 is formed at least in a region corresponding to the seal portion 11. Conversely, the back substrate 10 without the release layer may be used by applying the hot melt pressure-sensitive adhesive 13 to the front substrate 9 via the release layer 12. The release layer 12 may be formed on both the front substrate 9 and the back substrate 10, and the hot melt pressure-sensitive adhesive 13 may be applied to one or both of them. Therefore, the release layer 12 may be on at least one of the front substrate 9 and the back substrate 10. Moreover, the hot-melt pressure-sensitive adhesive 13 may be applied through the release layer 12, or when there is no release layer on one side, it may be applied to the side without the release layer. The hot melt pressure-sensitive adhesive 13 may be applied to a thickness that can ensure a predetermined sealing property.

  The heating element enclosure 2 having such a configuration is manufactured through the steps shown in FIGS. 4 and 5. 4 and 5 show a double-row (four-row) type production line, the same applies to a single-row type production line. For the backing base material 10a, a biaxially stretched polypropylene film coated with an oxygen permeability control material and formed with a release layer 12 in the form of a thin film by coating with a release agent such as a silicon liquid is used. Moreover, the surface base material 9a uses a biaxially stretched polypropylene film coated with an oxygen permeability control material and having no release layer.

  In the production of the heating element encapsulant 2, first, the back base material 10 a is continuously fed out at a predetermined speed in the longitudinal direction from the raw roll 15, while the nozzle or other coating means 17 is used in the coating process 16. The hot melt pressure-sensitive adhesive 13 is applied to the release layer 12 side of the base material 10a (see FIG. 5A).

  In this coating process 16, the release layer 12 of the backing base material 10a is formed so that the housing regions 18 for the heating elements 1 are formed vertically and horizontally at predetermined intervals in the longitudinal direction and the width direction of the backing base material 10a. The hot melt pressure-sensitive adhesive 13 is coated on the side in the longitudinal direction and the width direction in a strip shape. For this reason, as shown in FIG. 4, the coating pattern of the hot-melt pressure-sensitive adhesive 13 includes a plurality of strip-shaped vertical coating portions 19 extending in the longitudinal direction of the bag base material 8 a on both sides of each storage area 18, and It has a strip-like horizontal coating portion 20 that connects the vertical coating portions 19 in the horizontal direction (width direction). Note that a release agent such as a silicon liquid for forming the release layer 12 may be applied to the back substrate original fabric 10 a after being fed out from the original fabric roll 15.

  Next, in the supply process 21 of the heating element 1, the heating element 1 manufactured through the heating element manufacturing process is sequentially supplied to each storage area 18 on the backing substrate original fabric 10a by a supply means (not shown) (see FIG. 5 (B)). At this time, the heating element 1 is prevented from coming into contact with the hot melt pressure-sensitive adhesive 13 around the accommodation area 18.

  Then, the front base material 9a guided through the guide roll 23 in the wrapping step 22 is stacked on the back base material 10a through the heating element 1 (see FIG. 5C). The heating element 1 is wrapped from both the front and back sides by the original fabric 9a and the back substrate original fabric 10a, and then the front substrate original fabric 9a and the back substrate original fabric 10a are heated by the pair of crimping rolls 25 in the crimping step 24. The front base material 9a and the back base material 10a are pressure-bonded with the hot-melt adhesive 13 (see FIG. 5 (D)), with both sides of the outer surface of the body 1 being pressed from the front and back sides.

  In the next cutting step 26, the pair of cutting rolls 27 and the surface base material 9a in a pressure-bonded state via the hot-melt adhesive 13 so that the seal portion 11 is formed on the entire outer periphery of the heating element 1 The backing base material 10a is cut vertically and horizontally at the crimped portion, and the heating element enclosure 2 in which the heating element 1 is sealed in the outer bag 3 is cut out (see FIG. 5E). Then, the heating element enclosure 2 is taken out via the takeout conveyor 28, and the remaining trim 29 is collected separately from the heating element enclosure 2.

  In this way, the heating element enclosure 2 in which the heating element 1 is sealed in the outer bag 3 can be easily manufactured. In particular, since the front base material 9 and the back base material 10 are sealed with the hot melt pressure-sensitive adhesive 13 at the seal portion 11, the seal portion 11 can be easily sealed as compared with the conventional heat seal method, and defective products are also generated. The speed of the entire production line including the packaging process can be easily promoted.

  Further, the front base material 9 and the back base material 10 are sealed by the hot melt pressure-sensitive adhesive 13 at the sealing portion 11, and the material itself is compared with the case where a laminate film, particularly a laminate type film of an easy peel film is used. However, the manufacturing cost of the heating element enclosure 2 can be greatly reduced due to the speedup of the entire manufacturing line.

  When the outer bag 3 is opened, the front base material 9 and the back base material 10 are separated and opened. However, since the back base material 10 has a release layer 12 between the hot melt adhesive 13, The end side of the back substrate 10 can be easily peeled off from the hot melt pressure-sensitive adhesive 13 by rubbing the edge of the material 10 on the side opposite to the hot-melt pressure-sensitive adhesive 13, and the back substrate 10 can be peeled off from the peeled portion. That's fine. The hot melt pressure-sensitive adhesive 13 remains attached to the front substrate 9 side.

  6 and 7 illustrate a second embodiment of the present invention. In this embodiment, one bag base material 8a is unwound from the raw roll 15, and the heat generating body 1 is packaged by folding the bag base material 8a into two folds. The heating element enclosure 2 similar to the above is manufactured. A biaxially stretched polypropylene film coated with an oxygen permeability control material is used for the bag base material 8a, and a release layer 12 is formed by coating a release agent such as a silicon liquid on the entire surface. Is formed.

  That is, as shown in FIG. 6 and FIG. 7, the bag base material 8 a is continuously fed out from the raw roll 15 at a predetermined speed, and in the coating process 16, the bag base material 8 a On the release layer 12 side, the hot melt pressure-sensitive adhesive 13 is applied so that the housing region 18 of the heating element 1 is formed at a predetermined interval in the longitudinal direction on substantially half of the back substrate 10 (FIG. 7A). )reference). The coating pattern of the hot-melt pressure-sensitive adhesive 13 at this time is a vertical coating extending in the longitudinal direction of the bag base material 8a on both sides (one end side and the center side in the width direction of the bag base material 8a) of the accommodation region 18. The machine part 19 and the horizontal coating part 20 which connects between the both vertical coating parts 19 in a horizontal direction are provided. The release layer 12 may be applied to the portion that will be the back substrate 10 of the bag base material 8a and may not be applied to the portion that will be the front substrate 9.

  Next, the heating element 1 is supplied to the accommodation region 18 of the bag base material 8a by a supply means (not shown) in the supply step 21 of the heating element 1 so as not to contact the hot melt adhesive 13 (FIG. 7B). reference). Next, in the folding packaging step 30, the bag base material 8a is formed by the folding means 31 such as a press roll at the folding portion 34 with the middle of the vertical coating portion 19 on the center side or the vicinity of the outside of the vertical coating portion 19 as a boundary. The side of the bag base material 8a that is not coated with the hot melt pressure-sensitive adhesive 13 is superimposed on the side of the hot melt pressure-sensitive adhesive 13, and the heating element 1 is placed on both sides of the bag base. It is wrapped in the original fabric 8a (see FIG. 7C). At this time, it is desirable that the bag base material 8a is folded in half so that the ear portions 35 at both ends in the width direction are substantially coincident with each other. In the crimping step 24, the pair of crimping rolls 25 is used to press the bi-fold bag base material 8a from the front and back sides of the heat generating body 1 on both sides of the seal portion 11 and crimp it with the hot melt adhesive 13 ( (See FIG. 7D).

  In the next cutting step 26, the pair of cutting rolls 27 is used to bond the bag base material 8a in the pressure-bonded state with the hot melt adhesive 13 so that the seal portion 11 is formed on the entire outer periphery of the heating element 1. Then, the heating element enclosure 2 in which the heating element 1 is enclosed in the outer bag 3 is cut out (see FIG. 7E). Then, the heating element enclosure 2 is taken out via the takeout conveyor 28, and the remaining trim 29 is collected separately from the heating element enclosure 2.

  In this way, the heating element enclosure 2 having the same structure as that of the first embodiment is also manufactured by the method of packaging the heating element 1 by folding the single bag base material 8a into two at the folding portion 34. In addition, since the seal portion 11 is sealed with the hot-melt pressure-sensitive adhesive 13, the same effect as in the first embodiment can be obtained. Other configurations are the same as those of the first embodiment.

  8-12 illustrate a third embodiment of the present invention. In the heating element enclosure 2 of this embodiment, as shown in FIGS. 8 to 10, a front base material 9 and a back base material 10 are configured by folding a single bag base material 8 in a folding portion 34. The front base material 9 side and the back base material 10 side are sealed by the hot melt pressure-sensitive adhesive 13 at the other three sides of the sealing portion 11 excluding the folded portion 34 side of the bag base material 8. On the outer peripheral side of the outer bag 3, an opening portion 36 to which the front base material 9 and the back base material 10 are not adhered is provided outside the seal portion 11 on the side opposite to the folding portion 34. 3 can be opened easily. In addition, the bag base material 8 uses a biaxially stretched polypropylene film coated with an oxygen permeability control material, and a release layer 12 is formed on the entire surface thereof.

  This heating element enclosure 2 is manufactured through each process of FIG. 11 and FIG. When the heating element encapsulant 2 is manufactured, the hot melt adhesive 13 is applied to the release layer 12 side of the bag base material 8a by the coating means 17 in the coating process 16 (FIG. 12A). reference). The coating pattern of the hot melt pressure-sensitive adhesive 13 at this time includes a longitudinal longitudinal coating portion 19 formed on one end side in the width direction of the bag base material 8a and a heating element at a predetermined interval in the longitudinal direction. In order to form one storage area 18, a horizontal coating section 20 extending from the vertical coating section 19 to the center in the width direction of the bag base material 8 a is provided between the storage areas 18. The vertical coating portion 19 has a predetermined width on one end side (one ear portion 35 side) of the bag base material 8a so that the opening portion 36 without the hot melt adhesive 13 can be formed when the heating element enclosure 2 is cut off. The non-coating region 37 is provided inside thereof.

  And after supplying the heat generating body 1 to the accommodation area | region 18 by the supply process 21 (refer FIG. 12 (B)), the inner end side of the horizontal coating part 20 is carried out by folding means 31, such as a pressing roll, at the folding packaging process 30. The bag base material 8a is folded in half at the folding portion 34 with the vicinity of the heating element 1 as a boundary so that the hot melt adhesive 13 of the bag base material 8a is not coated. The side is superposed on the back substrate 10 side coated with the hot-melt pressure-sensitive adhesive 13, and the heating element 1 is wrapped by the bag base material 8a from both the front and back sides (see FIG. 12C). Thereafter, the front base material 9 side and the back base material 10 side of the bag base material 8a are connected to the front and back sides on the three sides excluding the folding part 34 on the outer peripheral side of the heating element 1 by a pair of press rolls 25 in the press bonding step 24. And is crimped by the hot melt adhesive 13.

  In the cutting step 26, the bag base material 8 a is vertically coated so that a pair of cutting rolls 27 can form the seal portion 11 on three sides excluding the folding portion 34 and the opening portion 36 on the opposite side of the folding portion 34. Three sides passing through the middle of the horizontal coating part 20 from the outside of the working part 19 are cut into a U shape, and the heating element enclosure 2 in which the heating element 1 is enclosed in the outer bag 3 is cut out (FIG. 12D )reference). Other configurations and processes are the same as those in the first or second embodiment.

  After the bag base material 8a is folded in two at the folding portion 34 to wrap the heating element 1 in this way, the bag base 8 is cut out in a U-shape outside the heating element 1, whereby the surface base The outer bag 3 in which the material 9 and the back base material 10 are connected by the folding part 34 on one side thereof can be configured, and the same effect as described above can be obtained. In addition, since the bag base material 8a is folded in the middle of the front end side of the horizontal coating part 20, the hot melt adhesive 13 also causes the outer bag 3 to be folded on the side of the folded part 34 between the front base material 9 and the back base material 10. The seal part 11 can be reliably sealed.

  13 to 18 illustrate a fourth embodiment of the present invention. The heating element enclosure 2 of this embodiment is an adhesive-type heating element 1 that is used by being attached to an affected part or clothing of a body and sealed in an outer bag 3, and is shown in FIGS. 15 is configured. For the back sheet 7 that is the sticking surface side of the heating element 1, a synthetic resin film or the like that is a material to which the hot melt pressure-sensitive adhesive 13 is easily transferred due to its adhesive force is used. The back base material 10 of the outer bag 3 has a seal part 11 from a back sheet corresponding part (adhesion surface corresponding part) 40 corresponding to the back sheet 7 (adhesion surface) on the release layer 12 side formed on the entire surface. The hot melt pressure-sensitive adhesive 13 is applied over the seal portion corresponding portion 41 corresponding to the above.

  The hot-melt pressure-sensitive adhesive 13 is a non-coated region corresponding to the belt-shaped non-coated region 43 corresponding to the ventilation portion 42 (see FIG. 17) on the back sheet 7 side of the heating element 1 and the non-coated region corresponding to the opening portion 36 outside the seal portion 11. The coating is applied to substantially the entire surface excluding the region 37. The non-coating region 43 for the ventilation portion 42 is provided in a wide band shape over the entire width direction substantially at the center in the longitudinal direction of the back sheet 7. The unsealing part 36 is provided in stripes, strips, or the like at both ends in the width direction. The front base material 9 and the back base material 10 are sealed by the hot melt adhesive 13 at the outer peripheral seal portion 11 of the heating element 1, and the hot melt adhesive 13 of the backsheet corresponding portion 40 is shown in FIGS. Thus, transfer (transfer) to the back sheet 7 is possible by the adhesive force at the time of opening. The ventilation part 42 is for ensuring air permeability when directly attached to the affected part of the body.

  A release layer is not formed on the front substrate 9. Therefore, a release layer is not formed on the surface base material 9 at a portion corresponding to the seal portion 11, and the hot melt adhesive 13 on the seal portion 11 side adheres to the surface base material 9 when the outer bag 3 is opened. Therefore, the hot melt pressure-sensitive adhesive 13 on the seal portion 11 side and the hot melt pressure-sensitive adhesive 13 on the heat generator 1 side can be reliably divided at the boundary portion between the heat generating body 1 and the seal portion 11. In order to ensure the separation of the hot melt pressure-sensitive adhesive 13 at the time of opening, at least a part of the surface base material 9 corresponding to the vicinity of the outer periphery of the heating element 1 has a strip-like release layer surrounding the heating element 1. It is sufficient if there is a coating area.

  A biaxially stretched polypropylene film coated with an oxygen permeability control material is used for the back substrate 10, and a release layer 12 is formed on the entire surface. Regardless of whether it is a direct attachment type that is directly attached to the affected part or a clothing attachment type that is attached to the clothing, the non-coated region 43 for the ventilation part 42 has a plurality of strips or It may be provided in a streak shape, or may be provided in one or more longitudinal strips or streaks in an intermediate portion excluding both ends in the width direction. Moreover, the ventilation part 42 and the non-coating area | region 43 do not need to be. The opening part 36 may be one end in the width direction, or may be provided anywhere outside the seal part 11 such as both ends or one end in the longitudinal direction, the entire circumference, or any corner.

  When the outer bag 3 is opened, after the edges of the front base material 9 and the back base material 10 are picked on the opening part 36 side, the both base materials 9 and 10 are opened while being pulled away. At this time, since the surface base material 9 does not have a release layer, the hot melt adhesive 13 of the seal portion 11 remains attached to the surface base material 9 as shown in FIG. The back base material 10 which it has peels from the hot-melt adhesive 13, and the outer bag 3 can be opened easily.

  Further, as shown in FIG. 16, the hot-melt pressure-sensitive adhesive 13 in the backsheet-corresponding portion 40 is peeled off from the back substrate 10 and transferred to the backsheet 7 side of the heating element 1. Therefore, when the outer bag 3 is opened and the heating element 1 is taken out, as shown in FIG. 17, there is a ventilation portion 42 at the center on the back sheet 7 side, and the hot melt adhesive 13 is attached to both sides of the ventilation portion 42. The wearing adhesive layer 44 is formed. Therefore, the heating element 1 can be easily attached to a predetermined part such as an affected part of the body or clothes through the adhesive layer 44, and the hot melt adhesive 13 forming the adhesive layer 44 is attached to the end of the backsheet 7. Since it is attached to the edge, the heating element 1 does not peel off even if it is rubbed with a jacket or the like.

  This heating element enclosure 2 is manufactured through the process shown in FIG. That is, in the coating process 16, the hot-melt pressure-sensitive adhesive 13 is applied to the coating region corresponding to the supply site of the heating element 1 of the back substrate 10. At this time, when the production line is a double row type, an uncoated region 43 for the ventilation portion 42 is formed in the width direction with respect to the supply portion of each heating element 1, and between the application regions of each supply portion. The hot melt pressure-sensitive adhesive 13 is applied so that an uncoated region 37 for the opening portion 36 can be formed in the longitudinal direction. In addition, the application area | region of the hot-melt adhesive 13 is an area | region including the back sheet | seat corresponding | compatible part 40 and the seal | sticker part corresponding | compatible part 41. FIG.

  Next, in the supply step 21 of the heating element 1, the heating element 1 is supplied onto the application region of the hot melt adhesive 13 by a supply means (not shown) so as to be located at each supply site. Then, in the wrapping step 22, the front base material 9a is superposed on the back base material 10a via the guide roll 23, and the heating element 1 is formed from the front and back sides by the front base material 9a and the back base material 10a. Then, in the pressure bonding step 24, the pair of pressure rolls 25 are used to pressure-bond with the hot melt pressure-sensitive adhesive 13 with the seal portion 11 side of the front base material 9a and the back base material 10a sandwiched from both front and back sides.

  In the next cutting step 26, the pair of cutting rolls 27 form the seal portion 11 on the entire outer circumference of the heating element 1, and the opening base 36 on both sides in the width direction of the outer bag 3. The substrate 9a and the back base material 10a are cut vertically and horizontally, and the heating element enclosure 2 in which the heating element 1 is enclosed in the outer bag 3 is cut out. The rest is the same as in the first embodiment.

  In this way, the same effect as that of the first embodiment can be obtained. In particular, the hot-melt pressure-sensitive adhesive 13 is applied to the back base material 10a over the backsheet corresponding part 40 and the seal part corresponding part 41 through the release layer 12, and the hotmelt adhesive of the backsheet corresponding part 40 is applied. Since the adhesive layer 44 for application is formed with the agent 13 and the seal portion 11 is sealed with the hot melt adhesive 13 of the seal portion corresponding portion 41, the adhesive layer 44 for application within a predetermined range including the end portion of the backsheet 7. Can be easily provided.

  19 to 25 illustrate a fifth embodiment of the present invention. As shown in FIGS. 19 to 21, the heating element enclosure 2 of this embodiment has a top sheet 6 that is a non-stick surface as an inner side and is folded in a folded manner by a folding portion 45 at a substantially central portion. 1 and one bag base material 8 are folded in two at a folding part 34 to form a front base material 9 and a back base material 10, and the seal part 11 on the other side excluding the folding part 34 is a hot melt adhesive. 13 and an outer bag 3 sealed by 13. On the outer peripheral side of the outer bag 3, an opening portion 36 is provided along the edge of the outer side of the seal portion 11 on the side opposite to the folding portions 34 and 45.

  A biaxially stretched polypropylene film coated with an oxygen permeability control material is used for the bag base material 8, and corresponds to the folded portion 45 of the heating element 1 on the release layer 12 side coated on the entire surface. Except for the non-coating region 43 and the non-coating region 37 corresponding to the opening portion 36, the hot melt pressure-sensitive adhesive 13 is applied to substantially the entire surface of the backsheet corresponding portion 40 and the seal portion corresponding portion 41. And the heat generating body 1 and the bag base material 8 are folded in two at the folding part 34 in a state of being overlapped (see FIG. 20), and the hot melt pressure-sensitive adhesive 13 on the bag base material 8 side is the adhesive when opened. It can be transferred to the back sheet 7 side of the heating element 1 by force (see FIGS. 22 and 23). Other configurations are substantially the same as those of the embodiments.

  This heating element enclosure 2 is manufactured through the steps shown in FIGS. That is, when the hot melt pressure-sensitive adhesive 13 is applied to the bag base material 8a in the coating process 16, the uncoated regions 37 for the opening portion 36 are formed on both sides in the width direction of the bag base material 8a. A hot melt pressure-sensitive adhesive that can be formed into a strip in the longitudinal direction and has a non-coating region 43 for the ventilation portion 42 corresponding to the folded portion 45 of the heating element 1 at a predetermined interval in the longitudinal direction at the center in the width direction. 13 is applied (see FIG. 25A).

  And after supplying the heat generating body 1 on the coating area | region of the hot-melt adhesive 13 of the bag base material 8a so that the non-coating area | region 43 may become the approximate center of the back sheet 7 by the supply process 21 (FIG. 25 (B)), by the folding means 31 in the folding and packaging step 30, the heating element 1 and the bag base material 8a are joined together at the folding portions 34 and 45 with the portion corresponding to the non-coating region 43 as a boundary. Fold it in half (see FIG. 25C). In this case, since the bag base material 8a has the non-coating region 43 of the hot melt adhesive 13 corresponding to the folded portion 45 of the heat generator 1, the stacked heat generator 1 and the bag base material are overlapped. 8a can be easily folded in half. After crimping in the subsequent crimping step 24 (see FIG. 25D), the heating element enclosure 2 is trimmed in the cutting step 26 (see FIG. 25E), etc., as in the second or third embodiment. is there.

  In this embodiment, when the outer bag 3 is opened, as shown in FIG. 22, the hot melt adhesive 13 of the seal portion corresponding portion 41 adheres to either the front base material 9 or the back base material 10, and the back sheet The hot melt pressure-sensitive adhesive 13 in the corresponding portion 40 is peeled off from the bag base material 8 and transferred to the back sheet 7 side. Therefore, the heating element 1 taken out from the outer bag 3 and developed has a vent portion 42 at the center portion of the back sheet 7 as shown in FIG. 23, and adhesive layers 44 for sticking with the hot melt adhesive 13 are formed on both sides thereof. It becomes what was formed, and can be affixed on clothes etc. through the adhesion layer 44. FIG.

  When the outer bag 3 is opened, the front base material 9 and the back base material 10 are both peeled from the hot melt pressure-sensitive adhesive 13 of the seal portion corresponding portion 41, and the hot melt pressure sensitive adhesive 13 of the seal portion corresponding portion 41 is removed. May remain on the outer periphery of the heating element 1, but since it protrudes outward from the heating element 1, it can be easily removed by pulling that portion. Other effects are the same as those of the other embodiments.

  26 and 27 illustrate a sixth embodiment of the present invention. The heating element enclosure 2 is formed by folding the bag base material 8 at the folding portion 34 in the same manner as in the fifth embodiment to form the front base material 9 and the back base material 10. As shown in FIG. 26, the outer bag 3 is provided with unsealing portions 36 on three sides excluding the folding portion 34 of the bag base material 8. In this case, as shown in FIG. 27, a non-coating region 46 for the opening 36 is formed between the coating regions of the hot melt adhesive 13 for each heating element 1 of the bag base material 8a. Thus, it can be manufactured in the same manner as in the fifth embodiment.

  28 to 32 illustrate a seventh embodiment of the present invention. The heating element encapsulant 2 of this example is the longitudinal direction of the heating element 1 so that the ends of the heating element 1 do not overlap each other when the heating element 1 is stacked on the hot melt adhesive 13 of the bag base material 8. The heating element 1 and the bag base 8 are folded with the top sheet 6 facing inward at two folding portions 34 and 45 in the direction. Accordingly, the central portion of the bag base material 8 is the back base material 10, and both sides thereof are the front base material 9.

  In the bag base material 8, non-coating regions 43 are formed in portions corresponding to the respective folded portions 45 of the heating element 1 (boundary portions between the back base material 10 and the front base material 9). The hot melt pressure-sensitive adhesive 13 is applied to the substantially entire area except the non-coated areas 37 and 43 through the release layer 12 so that the non-coated areas 37 are formed. In the folded state, the other ear portion 35 b side is polymerized via the hot melt adhesive 13 on the outer side on the one ear portion 35 a side.

  And the seal part 11a which seals the both ear | edge parts 35 side of the bag base material 8 is formed by the hot-melt adhesive 13 of the other ear | edge part 35b side, Moreover, the hot-melt part of the part is formed on both sides of the heat generating body 1. A seal portion 11 for sealing the front and back of the bag base material 8 with the adhesive 13 is formed. The outer ear portion 35 b is an opening portion 36, and the bag base material 8 is peeled off from the opening portion 36 and opened.

  At the time of manufacture, the hot melt pressure-sensitive adhesive 13 is formed on the release layer 12 side of the bag base 8 except for the non-coat areas 37 on both ends of the bag base 8 and the non-coat areas 43 corresponding to the folded portions 45. Is applied (see FIGS. 31 and 32A), and the heating element 1 is overlaid on the hot-melt adhesive 13 with the back sheet 7 facing down (see FIG. 32B). In this case, one end side of the heating element 1 is close to one end of the application region of the hot melt pressure-sensitive adhesive 13, and a sufficient application region of the hot-melt pressure-sensitive adhesive 13 that forms the seal portion 11a is left on the other side.

  Next, the heating element 1 and the bag base material 8 are folded inward at the folding portions 34 and 45 corresponding to the one non-coating region 43 (see FIG. 32C), and then the other non-coating region 43. The heating element 1 and the bag base material 8 are folded inward by the folding portions 34 and 45 corresponding to (see FIG. 32D). And the bag base material 8 folded later is overlapped on the upper side of the bag base material 8 folded first through the hot-melt pressure-sensitive adhesive 13, and the seal portion 11a formed by the hot-melt pressure-sensitive adhesive 13 in that portion. Thus, the overlapping portions of the bag base material 8 are sealed, and both end sides of the flat bag-shaped bag base material 8 are sealed by the seal portion 11 formed by the hot melt adhesive 13 on the outer side from the heating element 1. Seal. Other configurations are the same as those of the other embodiments.

  33 to 36 illustrate an eighth embodiment of the present invention. As in the fifth embodiment, the heating element enclosure 2 is formed by folding the bag base material 8 at the folding portion 34 to form the front base material 9 and the back base material 10. 33. As shown in FIG. 33, the bag base material 8 has a release layer 12 corresponding to one of the front base material 9 and the back base material 10, for example, the seal part 11 and the opening part 36 on the back base material 10 side. The non-coating region 48 is provided, and the release layer 12 is formed except for the non-coating region 48.

  The non-coating region 48 is provided in the entire seal part 11 in a range from one end side of the back base material 10 to the folded part 45 of the bag base material 8, and the hot melt adhesive 13 on the seal part 11 side when opened. The inner peripheral side is close to the outer periphery of the heating element 1 so that the hot melt pressure-sensitive adhesive 13 on the heating element 1 side can be divided at the boundary portion. And as shown in FIG. 34, the hot melt adhesive 13 is coated on the bag base material 8 on the substantially whole surface except the non-coating area | regions 37 and 43 of the bag base material 8 from there. In addition, the non-coating area | region 48 should just exist in the outer periphery vicinity of the heat generating body 1, and does not need to be provided in the whole region corresponding to the seal part 11. FIG.

  In the case of the fifth embodiment, the hot melt pressure-sensitive adhesive 13 cannot be reliably divided at the boundary between the seal portion 11 and the back sheet 7 at the time of opening, and the hot melt pressure-sensitive adhesive 13 on the seal portion 11 side is separated from the back sheet 7. There is a risk of sticking to the heating element 1 side in a protruding state.

  However, if the heating element enclosure 2 is manufactured in the same manner as in the fifth embodiment using the bag base material 8 having the non-coating region 48 as described above, it is sealed when opened as shown in FIGS. The hot-melt pressure-sensitive adhesive 13 in the portion 11 remains on the back substrate 10 side in the non-coated region 48, and the hot-melt pressure-sensitive adhesive 13 on the seal portion 11 side and the heating element 1 side on the inner peripheral side of the non-coated region 48. The hot melt pressure-sensitive adhesive 13 can be reliably divided, and the hot melt pressure-sensitive adhesive 13 on the seal portion 11 side does not remain on the heating element 1 side in a state of protruding from the back sheet 7. Other configurations are the same as those of the other embodiments.

  The same can be applied to the sixth embodiment. In addition, since the hot-melt adhesive 13 of the seal part 11 in the sixth case is adhered to the outside of the bag base material 8 without the release layer 12, it remains on the outside of the bag base material 8.

  As mentioned above, although the Example of this invention was explained in full detail, a various change is possible within the range which does not deviate from the meaning of this invention. For example, in each of the examples, a biaxially stretched polypropylene film coated with an oxygen permeability control material is used as the bag base material 8, but other synthetic resins can be used as long as the predetermined confidentiality can be secured. It is also possible to use a single film or a composite film. The release agent for forming the release layer 12 may be other than silicon.

  There are various types of hot melt pressure-sensitive adhesives 13, but the hot melt pressure-sensitive adhesive 13 is not limited to a specific type. The hot melt pressure-sensitive adhesive 13 exemplifies a case where it is applied to substantially the entire surface excluding the non-coating regions 37 and 43 of the bag base material 8, but as long as the sealing performance of the seal portion 11 is not impaired, You may apply in stripes with various patterns, such as zigzag form and spiral form. As the coating means 17, various types such as a brush type and a roll type can be used in addition to the nozzle type.

  In the case of the sticking type heating element 1, the back sheet 7 is generally a film, but may be other than the film. The top sheet 6 is sufficient if it has air permeability, and may be, for example, a nonwoven fabric or a film with small holes. In the case of the non-sticking type heating element 1, it is sufficient that at least one of the top sheet 6 and the back sheet 7 has air permeability.

  The heating element 1 is supported by the supporting fiber body so that the heating powder 4 is not spilled by, for example, compressing and molding the supporting fiber body after the heating powder 4 is placed in a supporting fiber body such as cotton. If it is a thing, the thing without the bag body 5 which packages it may be sufficient. Therefore, in each Example, although the back sheet 7 side of the bag body 5 is demonstrated as a sticking surface with respect to clothes etc., since there is also the heat generating body 1 without the bag body 5, the hot-melt adhesive 13 is the heating element 1 of the heat generating body 1. Any structure that transfers to the sticking surface is sufficient.

It is a disassembled perspective view of the heating element enclosure which shows the 1st Example of this invention. It is sectional drawing of the heat generating body enclosure which shows the 1st Example of this invention. It is an exploded sectional view of a heating element enclosure showing a 1st example of the present invention. It is a perspective view of the manufacturing process which shows the 1st Example of this invention. It is sectional drawing of the manufacturing process which shows the 1st Example of this invention. It is a perspective view of the manufacturing process which shows the 2nd Example of this invention. It is sectional drawing of the manufacturing process which shows the 2nd Example of this invention. It is a perspective view of the heating element enclosure which shows the 3rd Example of this invention. It is a cross-sectional top view of the heating element enclosure which shows the 3rd Example of this invention. It is sectional drawing of the heat generating body enclosure which shows the 3rd Example of this invention. It is a perspective view of the manufacturing process which shows the 3rd Example of this invention. It is sectional drawing of the manufacturing process which shows the 3rd Example of this invention. It is a disassembled perspective view of the heating element enclosure which shows the 4th Example of this invention. It is a longitudinal cross-sectional view of the heating element enclosure which shows the 4th Example of this invention. It is a cross-sectional view of the heating element enclosure which shows the 4th Example of this invention. It is opening explanatory drawing which shows the 4th Example of this invention. It is a perspective view of the heat generating body which shows the 4th Example of this invention. It is a perspective view of the manufacturing process which shows the 4th Example of this invention. It is a perspective view of the heating element enclosure which shows the 5th Example of this invention. It is a longitudinal cross-sectional view of the heating element enclosure which shows the 5th Example of this invention. It is a top view of the heating element enclosure which shows the 5th Example of this invention. It is opening explanatory drawing which shows the 5th Example of this invention. It is a perspective view of the heat generating body which shows the 5th Example of this invention. It is a perspective view of the manufacturing process which shows the 5th Example of this invention. It is sectional drawing of the manufacturing process which shows the 5th Example of this invention. It is a plane sectional view of a heating element enclosure showing a 6th example of the present invention. It is sectional drawing of the manufacturing process which shows the 6th Example of this invention. It is a perspective view of the heating element enclosure which shows the 7th Example of this invention. It is a top view of the heating element enclosure which shows the 7th Example of this invention. It is sectional drawing of the heat generating body enclosure which shows the 7th Example of this invention. It is an expanded view of the bag base material which shows the 7th Example of this invention. It is sectional drawing of the manufacturing process which shows the 7th Example of this invention. It is an expanded view of the bag base material which shows the 8th Example of this invention. It is an expanded view of the bag base material which shows the 8th Example of this invention. It is opening explanatory drawing which shows the 8th Example of this invention. It is sectional drawing at the time of opening which shows the 8th Example of this invention.

Explanation of symbols

1 Heating element 2 Heating element enclosure 3 Outer bag 6 Top sheet (non-sticking surface)
7 Back sheet (sticking surface)
8 Bag base material 9 Front base material 10 Back base material 11 Sealing part 12 Release layer 13 Hot melt adhesive 34 Folding part 36 Opening part 40 Adhesive surface corresponding part 41 Sealing part corresponding part 43,48 Non-coating area

Claims (9)

In the heating element encapsulant formed by enclosing the heating element (1) in the outer bag (3) sealed by the sealing portion (11), the bag base material (8) of the outer bag (3) is connected to the sealing portion ( 11) A heating element encapsulant which is sealed with a hot-melt pressure-sensitive adhesive (13) so that it can be opened. The sticking surface corresponding part (40) corresponding to the sticking surface (7) on the sticking surface (7) side of the heating element (1) of the bag base material (8) and the seal part ( The hot melt pressure-sensitive adhesive (13) is applied to a seal portion corresponding portion (41) corresponding to 11) via a release layer (12), and the hot melt pressure-sensitive adhesive of the seal portion corresponding portion (41). The bag base material (8) is sealed by (13), and the hot melt pressure-sensitive adhesive (13) of the sticking surface corresponding part (40) can be transferred to the sticking surface (7). The heating element enclosure according to claim 1. The heating element (1) and the bag base material (8) are folded at folding parts (34) and (45) with the non-stick surface (6) of the heating element (1) inside, and the bag base material On the side of the folding part (45) of (8), the non-coated area (43) where the hot melt adhesive (13) is not applied is opposed to the folding part (34) of the heating element (1). The heating element enclosure according to claim 2, wherein the heating element enclosure is provided. Of the front substrate (9) and the back substrate (10) of the bag substrate (8), it corresponds to the outer periphery of the sticking surface (7) on the seal part (11) side of either one of them. The non-coating region (48) without the release layer (12) is provided, and the release layer (12) is on the other seal portion (11) side. The heating element enclosure described. The opening part (36) to which the hot-melt adhesive (13) is not applied is provided outside the sealing part (11) of the bag base material (8). The heating element enclosure according to any one of the above. The heating element enclosure according to any one of claims 1 to 5, wherein the bag base material (8) is a biaxially stretched polypropylene film coated with an oxygen permeability control material. In producing the heating element enclosure (2) in which the heating element (1) is enclosed in the outer bag (3), the hot melt pressure-sensitive adhesive (13) is applied to the bag base material (8) having the release layer (12). The heating element encapsulating material is characterized in that the heating element (1) is wrapped with the bag base material (8) and the sealing portion (11) is sealed with the hot melt adhesive (13). Production method. A portion corresponding to the sticking surface (40) corresponding to the sticking surface (7) of the heating element (1) of the bag base material (8) and a seal portion corresponding portion corresponding to the seal portion (11) outside thereof ( 41) and the hot-melt pressure-sensitive adhesive (13) are applied to the sealing portion by the hot-melt pressure-sensitive adhesive (13) of the seal portion corresponding portion (41). The heating element enclosure according to claim 7, wherein 11) is sealed, and the hot melt pressure-sensitive adhesive (13) of the portion corresponding to the sticking surface (40) is stuck to the sticking surface (7). Manufacturing method. The hot melt pressure-sensitive adhesive (13) is applied to the bag base material (8) except for the non-coating region (43) corresponding to the folded portion (34) of the heating element (1), and the hot melt On the adhesive (13), the heating element (1) is overlapped with the folding part (34) corresponding to the non-coating area (43), and the heating element (1) and the bag base material (8) are stacked. The heating element enclosure manufacturing method according to claim 8, wherein the non-sticking surface (6) of the heating element (1) is inwardly folded at the folding portions (34) and (45). .

Images