JP4474193B2 - Occlusion device and packaging bag with occlusion device - Google Patents

Description

  The present invention relates to an occlusion device (chuck tape) that is provided at an opening of a bag body and can be opened and resealed, and a packaging bag with an occlusion device that includes the occlusion device.

As a packaging material for wrapping various articles such as foods and medical products, a pair of band-shaped biting tools (chuck tapes) that are formed by male and female members and bite male and female with respect to the opening of the bag are provided. A packaging bag that can be freely opened and closed is used.
In addition, as a method of manufacturing a packaging bag with an occlusion device that can freely open and close such an opening, generally, after manufacturing a tape with an occlusion device in advance, the tape with the occlusion device is attached to the bag body. A method of fusing to a base film that is a constituent material is widely used.

  Low density polyethylene (LDPE), linear low density polyethylene (LLDPE), ethylene-polar vinyl monomer copolymer, polypropylene (PP) resin, etc. are used as the resin constituting the occlusion device. The sealant layer, which is a film layer to which the bite is fused, is also made of the same kind of resin as the bite. For example, when the sealant layer of the base film is made of a low density polyethylene resin, the low density polyethylene resin is similarly used as the constituent resin of the occlusion device, and thus the configuration of the sealant layer and the occlusion device By using the resin in common, the occlusion tool is fused to the sealant layer of the base film.

On the other hand, when manufacturing the occlusal device, the resin constituting the occlusal device was extruded from the die and wound around the reel while cooling the extrusion heat, but due to the shrinkage phenomenon accompanying cooling, the shape of the occlusal device May be deformed.
Further, when the occlusion device and the base film constituting the bag body are bonded by fusion, the male member and the female member may be deformed depending on the temperature of the fusion portion, and may not function as the occlusion device. In some cases, wrinkles and pinholes are generated in the vicinity of the fused portion, which impedes the appearance and performance. For this reason, sealing at a low temperature is required, but the sealing time becomes long and the productivity is not sufficient.

  As shown in FIGS. 7 and 8, an articulator having a three-layer configuration of a belt-like base portion to be fused with the bag body has been studied for such problems. FIG. 7 is a front view of a package 500 with a bite device including a conventional bite device 100, and FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 7 (a cross-sectional view showing the configuration of the bite device 100). As shown in FIGS. 7 and 8, the belt-like base 110 fused to the bag body 400 includes a first layer 111 constituting a male member 200 or a female member 300 that meshes with each other, a second layer 112 serving as an intermediate layer, and For example, the first layer 111 and the third layer 113 are formed of a polypropylene resin or a polyethylene resin to form an intermediate layer. The two layers 112 are made of a resin having higher heat resistance than the first layer 111 and the like, so as to suppress generation of wrinkles and pinholes when the articulating tool 100 and the bag body 400 are fused, I was trying to solve the problem.

  The occlusal device is composed of a tape-like base piece, and the base piece is composed of a three-layer structure of a surface layer, an intermediate layer and a back layer made of a tape-like film. There has been provided a synthetic resin chuck in which the film of the layer is a resin film having higher hardness and lower thermal shrinkage than the materials constituting the front and back layers (for example, Patent Document 1). In addition, a heat-shielding film having a melting point higher than that of the tape part is bonded to the intermediate layer of the tape-shaped film constituting the occlusal tool, and the melting point is lower than that of the heat-shielding film on the outside of the heat-shielding film. There has been provided an occlusion device in which a fusion film is bonded (for example, Patent Document 2).

Japanese Patent No. 2847662 (Claim 1, FIG. 2) Japanese Patent Publication No. 6-37097 (Claim 2, FIG. 1)

However, the bite provided by Patent Literature 1 and Patent Literature 2 peels at the interface with the intermediate layer when the packaging bag is released because the intermediate layer exists up to the end of the tape-like base piece. There is a fear. Further, as shown in FIGS. 7 and 8, in the case where the articulating tool 100 is used to fuse the base film of the bag body 400, the side seal portion 401, which is the end of the fused portion of the bag body, is used. Since there is a heat shield layer in the occlusal crushing portion 402 (shown in FIG. 9 IX-IX sectional view of FIG. 7 described above), there is little melting of the resin around the chuck and wrapping of the molten resin, and the heat shield layer is made of polyethylene. In the case of a terephthalate (PET) film, there was a possibility that pinholes 403 such as air leaks would occur without being fused at the end of the base piece. In addition, if the base film has an aluminum layer, aluminum cracks (a phenomenon in which the aluminum layer breaks and streaks) are likely to occur, and production of packaging bags with commercial value in terms of performance and appearance is produced. It was difficult to get well.
Furthermore, the articulating device provided by Patent Document 2 has a structure in which a high-melting-point heat-shielding film and a low-melting-point fusible film are bonded together.

  Therefore, the object of the present invention is that it can be easily and stably produced, has a wide range of fusion temperatures when fused to the base film of the bag body, and has a pinhole or the like in the occlusion device or its vicinity. An object of the present invention is to produce a high-quality occlusion device and a packaging bag with an occlusion device that are free of wrinkles and the like and have a good product appearance with high productivity.

In order to achieve the above-described object, the occlusal device of the present invention includes a pair of male members made of a thermoplastic resin that are formed of an occlusal portion and a band-shaped base portion that is integrally formed with the occlusal portion and is fused to the bag body. And a female member, wherein only the belt-like base part is composed of a base part and a core part, the core part is higher in rigidity than the base part, and the base part wraps around the core part. And

In the occlusal device of the present invention, the band-shaped base portion constituting the male member and the female member is a composite of a base portion and a core portion having higher rigidity than the base portion, and the highly rigid core portion and base portion. Since the base part wraps around the core part instead of just a laminated structure, even if it is fused to the bag body, the occlusion tool and its vicinity (the fused part, crushing of the occlusal tool) It is possible to prevent the occurrence of pinholes, wrinkles, etc.
Also, since the base part wraps around the core part, when the occlusal tool and the bag body are fused, the core part and the base part (bag body and occlusion part) may be peeled even when the occlusion is released. There is nothing.
And also in manufacture of an articulating tool, since the core part is wrapped by coextrusion molding, since the articulating tool can be manufactured continuously and stably, productivity is also good.

The articulating device of the present invention is preferably made of a resin whose tensile elastic modulus of the base portion resin is 1.5 times or more higher than the tensile elastic modulus of the base portion from the tensile elastic modulus of the core portion resin. More preferably, it is made of a high resin.
Specifically, the core resin is polyethylene (PE) resin, ethylene-polar vinyl monomer copolymer, polypropylene resin, polyamide (nylon) resin, crystalline polyester resin, low crystalline or amorphous copolymer. It is preferable that it is 1 type or 2 types or more of the group which consists of a polymerization polyester resin, a polycarbonate (PC) resin, a polystyrene (PS) type resin, and a copolymer of ethylene and a cyclic olefin.
According to the present invention, since the core portion is made of a resin having a tensile elastic modulus 1.5 times higher than that of the base portion, even when the occlusion device is fused to the bag body, the occlusion device and its vicinity are pinned. It is possible to further prevent the generation of holes and soot.
In addition, if the resin is a specific resin such as the above-described crystalline polyester resin, polyester resin, low crystalline or amorphous copolymer polyester resin, such an effect can be suitably enjoyed.

In the occlusion device of the present invention, the resin constituting the occlusion device and the base portion described above is polyethylene having a density of 890 to 940 g / m ³ , an ethylene-α-olefin copolymer, an ethylene-polar vinyl monomer copolymer resin, It is preferable that it is 1 type or 2 types or more of the group which consists of polypropylene resin, an ionomer, and ethylene-methacrylic acid copolymer (EMAA). By using such a resin, it is possible to relatively reduce the temperature when fusing the bag body and the bite, and it is possible to reduce the fusing time by reliably fusing and increasing the fusing speed. And quality and productivity are improved.

If necessary, an adhesive polyolefin-based resin modified with an unsaturated carboxylic acid such as maleic anhydride and a derivative thereof can be added to the resin constituting the base portion.
Further, the melt flow rate (MFR) of these resins is preferably 0.5 to 20 g / 10 minutes, and preferably 2 to 10 g / 10 minutes (measured in accordance with JIS K7210).

In the occlusion device of the present invention, it is preferable that a fusion part made of a resin having a melting point lower than that of the base part is formed on the above-described belt-like base part.
According to the present invention, since a fusion part having a melting point lower than that of the base part is formed with respect to the belt-like base part constituting the articulation tool, the belt-like shape when the articulation tool and the bag body are fused. The thermal influence on the base can be reduced, and the fusion conditions can be widened such that the fusion can be performed at a low temperature when the bag body is fused.

  In the case of forming a fusion part having a melting point lower than that of the base part with respect to the belt-like base part, the articulating device of the present invention seems to wrap the core part by the base part and the fusion part. It may be.

The occlusion device of the present invention is a linear ethylene-α-olefin copolymer having a density of less than 850 to 905 kg / m ³ , or an ethylene-polar vinyl monomer copolymer. It is preferable that it is 1 type, or 2 or more types selected from the group which consists of a coalescence, an ethylene propylene copolymer, and a propylene-butene-1 copolymer.
According to the present invention, the resin constituting the fused part is made of a specific copolymer having a relatively low melting point and a copolymer having good adhesiveness. Can be suitably carried out.

In the articulating device of the present invention, the core portion described above may be divided.
According to the present invention, the core portion wrapped in the base portion or the like in the band-shaped base is divided as viewed from the cross section, so that the core portion is continuously formed as viewed from the cross section. Thus, the formation of the core portion and the base portion can be further stabilized.

The packaging bag with a bite according to the present invention is characterized in that the bite mentioned above is fused to the bag body.
In this packaging bag with an occlusal device of the present invention, since the above-mentioned occlusion device is formed by being fused to the bag body, the effect of the above-described occlusal device of the present invention can be suitably enjoyed. .

  That is, the packaging bag with an occlusion device of the present invention is a packaging bag with good quality without peeling of the core portion and the base portion, and no pinholes or wrinkles in the occlusion device and its vicinity. Even when the bag body is manufactured by fusing, the fusing can be performed stably at high speed.

[First Embodiment]
The occlusion device and the packaging bag with the occlusion device of the first embodiment of the present invention (hereinafter sometimes simply referred to as “packaging bag”) will be described with reference to FIGS. 1 and 2.
FIG. 1 is a front view showing a packaging bag with an occlusion device in which the occlusion device of the present invention is fused to a bag body. Moreover, FIG. 2 is a figure which shows the state which fuse | melted the occlusion tool of this invention to the bag main body which comprises a packaging bag, (A) is the state which the occlusion part left | separated, (B) is the occlusion part occlusion It is sectional drawing which shows the state which carried out, respectively.
Here, in FIGS. 1 and 2, 1 is an occlusion tool, 2 is a bag-making fusion part (side seal part), 3 is an occlusion tool crushing part, 10 is an occlusion part, 11 is a male member, 12 is a female member, Reference numeral 13 denotes a belt-like base portion, 14 denotes a base portion, 15 denotes a core portion, 16 denotes a head portion, 17 denotes a connecting portion, 18 denotes a first hook portion, 19 denotes a second hook portion, 20 denotes a bag body, and 30 denotes a packaging bag. , Respectively.

As shown in FIG. 2, the occlusal tool 1 according to the present embodiment includes one band-shaped male member 11 made of a thermoplastic resin and the other female member 12 made of a thermoplastic resin and engaged with the male member 11. ing.
Here, the male member 11 is integrated by a belt-like base portion 13 fused to the bag body 20, a head portion 16 having a substantially mushroom-shaped cross section, and a connecting portion 17 that connects the belt-like base portion 13 and the head portion 16. Is formed.

Similarly to the male member 11 described above, the female member 12 includes a belt-like base portion 13 fused to the bag body 20 and a first cross-section formed by connecting to the belt-like base portion 13 having an arc shape. The first hook portion 18 and the second hook portion 19 are formed so as to face each other.
In the bite tool 1, the head portion 16 of the male member 11 and the first hook portion 18 and the second hook portion 19 of the female member 12 form the bite portion 10. Open or reseal.

As shown in FIG. 2, the band-shaped base portion 13 that constitutes the occlusal device 1 includes a base portion 14 and a core portion 15 that is stiffer than the base portion 14, and the base portion 14 wraps around the core portion 15. Yes.
Thus, since the belt-like base portion 13 is a composite of the base portion 14 and the core portion 15 having a rigidity higher than that of the base portion 14, even when the bag main body 20 is fused, the bite 1 and its It is possible to prevent wrinkles and the like from occurring in the vicinity.
In addition, since the highly rigid core portion 15 and the base portion 14 are not simply laminated, the base portion 14 wraps the core portion 15, so the articulating tool 1 and the bag body 20 are fused. In some cases, the core 15 and the base 14 do not peel off. In addition, pinholes are not generated in the occlusal crushing portion 3 where the fusion portion 2 and the occlusion device 1 overlap each other during bag making. Furthermore, since the articulator 1 can be manufactured continuously at a high speed and stably, the articulator 1 can be manufactured with good productivity.

Here, as a material for forming the male member 11 and the female member 12 and constituting the base portion 14 of the belt-like base portion 13, polyethylene having a density of 890 to 940 g / m ³ , an ethylene-α-olefin copolymer, ethylene- It is preferable that it is 1 type or 2 types or more of the group which consists of a polar vinyl monomer copolymer, an ionomer, ethylene-methacrylic acid copolymer (EMAA), and a polypropylene-type resin. By using such a resin, the temperature of the bag body 20 and the articulator 1 can be relatively increased, and the fusion time can be shortened by reliably fusing and increasing the fusing speed. Can improve quality and productivity.
Note that, if necessary, an adhesive polyolefin resin modified from an unsaturated carboxylic acid such as maleic anhydride and its derivative can be added to the resin constituting the base portion 14. Moreover, 0.5-20 g / 10min is preferable and, as for the melt flow rate (MFR) of these resin, 2-10 g / 10min is preferable. The MFR may be measured according to JIS K7210.

  In the occlusal device 1 of the present embodiment, the male member 11 is formed by integrally forming the base portion 14, the head portion 16, and the connecting portion 17 of the belt-like base portion 13 with the resin constituting the base portion 14. Further, the female member 12 also shows a mode in which the base portion 14 of the band-shaped base portion 13, the first hook portion 18, and the second hook portion 19 are integrally formed by the resin constituting the base portion 14.

Next, the resin constituting the core portion 15 is formed of a resin having higher rigidity than the resin constituting the base portion 14 described above. Here, in the present invention, “high rigidity” means that the resin constituting the core portion 15 has a higher tensile elastic modulus than the resin constituting the base portion 14, specifically, the tensile elastic modulus is 1 .5 times or more, preferably 2 times or more. As a result, the core portion 15 is less heat shrinkable and heat deformable than the base portion 14.
The tensile elastic modulus of the resin may be measured according to JIS K7113.

The resin of the core portion 15 is not particularly limited, and may be selected in relation to the rigidity (tensile modulus, etc.) of the resin of the base portion 14, and may be the same type of resin. Specifically, polyethylene (PE) resin, ethylene-polar vinyl monomer copolymer, polypropylene resin, polyamide (nylon) resin, crystalline polyester resin, low crystalline or amorphous copolymer polyester resin, polyethylene What is necessary is just to make it consist of 1 type, or 2 or more types of the group which consists of a copolymer of a terephthalate, a polybutylene terephthalate, a polycarbonate (PC) resin, a polystyrene (PS) resin, and ethylene and a cyclic olefin. By making the core portion 15 made of such a resin, it is possible to suitably prevent the occurrence of the bite 1 and the wrinkles and pinholes in the vicinity thereof when the bite 1 is fused to the bag body 20. . Further, the resin constituting the core portion 15 may be made of the resin constituting the base portion 14 as long as a resin having higher rigidity than the base portion 14 is selected.
In addition to these, as the resin of the core portion 15, polyacrylonitrile (PAN), TBX, polyethylene naphthalate (PEN), polyvinyl alcohol (PVA), an ethylene-norbornene copolymer, or the like may be used. .

In FIG. 2, the thickness t ₁ of the base portion 14 constituting the strip-shaped base portion 13 may be approximately 30 to 250 μm, and the thickness t ₂ of the core portion 15 is approximately 10 to 200 μm. may be such that, may be the base portion 14 side thickness _{t 3} as generally becomes about 0.2 to 5.0 mm. If t ₁ , t _2, and t ₃ such as the thickness of the base portion 14 and the core portion 15 in the belt-like base portion 13 are set in such a range, the base portion 14 and the core portion 15 do not peel off, and the bag Even when fused with the main body 20, it is possible to prevent the occurrence of pinholes, wrinkles, and the like in the vicinity of the bite 1, and to provide the bite 1 with good appearance and function. .

  The male member 11 forming the occlusal device 1 of the present embodiment can be obtained by integrating the base portion 14 and the core portion 15, and the head portion 16 and the connecting portion 17 constituting the belt-like base portion 13 by a coextrusion molding method. it can. Similarly, the female member 12 can also be obtained by integrating the base portion 14 and the core portion 15 constituting the belt-like base portion 13, and the first hook portion 18 and the second hook portion 19 by a coextrusion molding method. Can do. Since the base part 14 which comprises the strip | belt-shaped base part 13 fuse | fused with the bag main body 20 is formed so that the core part 15 may be wrapped, the occlusal tool 1 of this invention is formed by such a coextrusion method. Even so, the articulator 1 can be manufactured continuously and stably.

Then, the articulator 1 is fused to the film base material forming the bag body 20 and the film base material is made into a bag to obtain a packaging bag 30 with the articulator as shown in FIG. be able to.
Here, as a film base material which forms the bag body 20, linear low density polyethylene (LLDPE), high density polyethylene (HDPE), unstretched polypropylene (CPP), a laminate laminated by a dry laminating method or extrusion laminating. Polyethylene terephthalate (PET) / LLDPE, PET / CPP, biaxially oriented polypropylene (OPP) / CPP, nylon / linear low density polyethylene (LLDPE), metal or inorganic deposited PET, metal or inorganic deposited PET / LLDPE, etc. Can be mentioned.

  Moreover, such a packaging bag 30 with a bite can be easily manufactured using, for example, a commercially available three-side seal bag making machine (made by Seibu Kikai Co., Ltd.) with a chuck tape (bite). In this case, the fusion conditions (temperature, pressure, etc.) can be appropriately determined according to the type of resin constituting the film base material forming the bite 1 and the bag body 20.

According to the articulating tool 1 and the articulated packaging bag 30 of the present embodiment as described above, the belt-like base portion 13 constituting the articulating device 1 is composed of a base portion 14 and a core portion 15 having rigidity higher than that of the base portion 14. As the composite body, the rigid core portion 15 and the base portion 14 are not laminated, but the base portion 14 wraps around the core portion 15. In addition to providing the occlusion device 1 with good productivity and quality, even when it is fused to the bag body 20, there are pinholes, wrinkles, etc. in the occlusion device 1 and its vicinity. Generation | occurrence | production can be prevented, and the packaging bag 30 with an occlusion implement provided with the occlusion implement 1 and the said occlusion implement which was excellent also in quality can be provided.
Further, if the core portion 15 is made of a resin having a tensile elastic modulus higher than that of the base portion 14 by 1.5 times or more, preferably 2 times or more, even when the bite 1 is fused to the bag body 20. Further, pinholes, wrinkles and the like can be further prevented from occurring in the bite tool 1 and the vicinity thereof.
And since it is set as the structure which the base part 14 has wrapped the core part 15, even when the biting tool 1 and the bag main body 20 are melt | fused, the core part 15 and the base part 14 do not peel.

[Second Embodiment]
In the first embodiment described above, the bonding of the bite 1 and the bag body 20 is such that the base part 14 of the belt-like base 13 constituting the bite 1 is fused to the bag body 20. However, the present invention is not limited thereto, and a separate fusion part may be provided to the base part 14 of the belt-like base part 13 so that the fusion part is fused to the bag body 20.
In the following description, members and the like similar to those already described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 3 is a view showing another aspect (second embodiment) of the articulating tool 1 according to the present invention, in which a fusing part 40 is provided on the fusing part 14 of the belt-like base 13 constituting the articulating tool 1. FIG. 5 is a cross-sectional view showing a mode in which the fusion part 40 is fused to the bag body 20.

Here, the resin constituting the fusion part 40 is preferably a resin having a melting point lower than that of the resin constituting the fusion part 14, for example, a linear shape having a melting point of 115 ° C. or less, preferably 110 ° C. or less. Examples thereof include ethylene-α-olefin copolymers and ethylene / vinyl acetate copolymers (EVA). In the occlusal device 1 of the present invention, the fused portion 40 has a density of less than 850 to 905 kg / m ³ and is a linear ethylene-α / olefin copolymer produced with a metallocene catalyst, or ethylene. -It is preferable to be composed of a resin such as a polar vinyl monomer copolymer, an ethylene-propylene copolymer, or a propylene-butene-1 copolymer, and the fusion part 40 has a relatively low melting point. By using resin, fusion to the bag body 20 under a low temperature condition can be suitably performed.

In FIG. 3, the thickness t ₁ of the base portion 14 constituting the strip-shaped base portion 13 may be approximately 30 to 250 μm, and the thickness t ₂ of the core portion 15 is approximately 10 to 200 μm. The side portion thickness t ₃ may be 0.2 to 5.0 mm, and the thickness t ₄ of the fused portion 40 may be approximately 5 to 100 μm. If the base part 14 and the core part 15 in the belt-like base part 13 and the thicknesses t ₁ , t ₂ , t ₃ and t ₄ of the fusion part 40 are set in such a range, the base part 14 and the core part 15 are separated. In addition, there is no delamination between the base portion 14 and the fused portion 40, and even when the bag body 20 is fused, pinholes, wrinkles, etc. are generated in the bite 1 or in the vicinity thereof. It is possible to provide the occlusal tool 1 with a good appearance and function.

In the case of forming the fused portion 40 with respect to the base portion 14 of the belt-like base portion 13,
The core portion 15 may be wrapped by the base portion 14 and the fusion portion 40. FIG. 4 is a view showing another aspect of FIG. 3, and is a cross-sectional view showing an aspect in which the core part 15 is wrapped by the base part 14 and the fusion part 40.

Also in the configuration shown in FIG. 4, the thickness t ₁ of the base portion 14 constituting the belt-like base portion 13 may be approximately 30 to 250 μm, and the thickness t ₂ of the core portion 15 is approximately 10 to 200 μm. The base portion 14 side portion thickness t ₃ is 0.2 to
The thickness t ₄ of 5.0 mm and the fused part 40 may be about 5 to 100 μm. If the thicknesses t ₁ , t ₂ , t ₃ , and t ₄ of the base portion 14 and the core portion 15 in the belt-shaped base portion 13 and the fusion portion 40 are set in such a range, the base portion 14 and the fusion portion 40 and the core portion. 15 and the delamination between the base portion 14 and the fused portion 40 do not occur, and even when the bag body 20 is fused, the bite 1, the fused portion 40 and its Occurrence of pinholes, wrinkles and the like in the vicinity can be prevented, and the occlusal tool 1 having good appearance and function can be provided.

  As shown in FIG. 3 and FIG. 4, if the fusion part 40 is provided on the base part 14 of the band-like base part 13 constituting the articulating tool 1, in addition to the effects shown in the first embodiment described above. Thus, it is possible to reduce the thermal influence on the band-shaped base 13 when the articulator 1 and the bag main body 20 are fused, and when performing the fusion with the bag main body 20, the fusion can be performed at a low temperature. The range of fusion conditions can be expanded.

  The aspect described above shows one aspect of the present invention, and the present invention is not limited to the above-described embodiment, and is within the scope of achieving the object and effect of the present invention. Needless to say, modifications and improvements are included in the content of the present invention. Further, the specific structure, shape, and the like in carrying out the present invention are not problematic as other structures, shapes, and the like as long as the objects and effects of the present invention can be achieved.

In the above-described embodiment, the core portion 15 that is wrapped in the base portion 14 in the belt-like base portion 13 that constitutes the occlusal portion has been shown to be continuously formed as viewed from the cross section, but is not limited thereto. As shown in FIGS. 5 and 6, the core portion 15 may be divided and formed as viewed from the cross section of the bite 1.
In the following description, members and the like that are the same as the parts or members already described in the first embodiment and the second embodiment are denoted by the same reference numerals, and description thereof is omitted.

FIG. 5 is a view showing another embodiment of the articulating device 1 of the present invention, and is a cross-sectional view showing an embodiment in which the core portion 15 is divided and formed. Indicates a substantially square cross-sectional shape.
FIG. 6 is a cross-sectional view showing an aspect in which the cross-sectional shape of the core part 15 formed by being divided in the articulating device 1 of FIG. 5 is substantially circular.
5 and 6 show only the male member 11 of the articulating tool 1.

  According to the articulating tool 1, the core part 15 wrapped in the base part 14 and the like in the belt-like base part 13 is divided as viewed from the cross section of the articulating tool 1, so that the core part 15 has a cross section. As compared with the first embodiment and the second embodiment that are continuously formed as viewed from the perspective, the peeling phenomenon between the core portion 15 and the base portion 14 and the like can be further prevented.

  The cross-sectional shape of the core portion 15 formed by division may be any shape such as a polygonal shape such as a triangular shape or a pentagonal shape, an elliptical shape, or a star shape in addition to the rectangular shape or the circular shape described above. it can.

  In the above-described embodiment, the occlusal tool 1 includes the substantially mushroom-shaped head 16 of the male member 11 that is the occlusal portion 10, and the first and second hook portions 18 and 19 of the substantially circular arc shape of the female member 12. However, the shape of the occlusal portion 10 is not limited to this, and the male member 11 can be opened as long as it has a function of opening and resealing. The shapes of the head 16 and the first hook portion 18 and the second hook portion 19 of the female member may be arbitrary.

In the above described embodiment, the thickness _{t 1} of the base portion 14, the thickness _{t 2} of the core portion 15, the base portion 14 side thickness _{t 3,} and showed a range of thicknesses of _{t 4} of the fused portion 40 As long as the effects of the present invention can be obtained, these thicknesses may be arbitrarily selected.
In addition, the specific structure, shape, and the like in the implementation of the present invention may be other structures as long as the object of the present invention can be achieved.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, this invention is not limited to the content, such as an Example, at all.

[Examples 1-3 and Comparative Examples 1-4]
Using the resins and manufacturing methods shown in the following (1) to (6), the occlusion devices of Examples 1 to 3 and Comparative Examples 1 to 4 were manufactured according to the configuration shown in Table 1.
In addition, Example 1 was set as the structure shown in FIG. 2, and Example 2 and Example 3 were set as the structure shown in FIG.

On the other hand, in Comparative Example 1 and Comparative Example 2, the core part 15 is not provided in the configuration shown in FIG. 2, and in Comparative Example 3, the core part 15 is not provided in the configuration shown in FIG. did. And the comparative example 4 was made to form an occlusion implement by the structure (structure disclosed by patent 2947662 gazette) shown in FIG.
In addition, about the physical property of the following resin, melting | fusing point was measured based on JISK7121, Furthermore, the density was measured based on JISK7121, Furthermore, the Vicat softening point was measured based on JISK7206, respectively.

  The tensile elastic modulus is a value measured in accordance with JIS and K7113 for a molded body obtained by molding the constituent resin under the same molding conditions as the base part and the core part.

(Resin used)
(1) Linear low density polyethylene-I (abbreviated as LLDPE-I)
Grade: Moretec 0628G (made by Idemitsu Petrochemical Co., Ltd.)
Density: 915 kg / m ³
MFR: 6.0 g / 10 min Melting point: 120 ° C.
Tensile modulus: 160 MPa

(2) Linear low density polyethylene-II (abbreviated as LLDPE-II)
Grade: Affinity KC8852 (Dow Chemical Co.)
Density: 875 kg / m ³
MFR: 3.0 g / 10 min Melting point: 68 ° C
Tensile modulus: 10 MPa

(3) Low density polyethylene (abbreviated as LDPE)
Grade: Petrocene 190 (manufactured by Tosoh Corporation)
Density: 927 kg / m ³
MFR: 4.0 g / 10 min Melting point: 109 ° C
Tensile modulus: 150 MPa

(4) Ethylene / vinyl acetate copolymer (abbreviated as EVA)
Grade: Ultrasen 541 (manufactured by Tosoh Corporation)
Density: 929kg / m ³
MFR: 9.0 g / 10 min Melting point: 95 ° C
Tensile modulus: 60 MPa

(5) Amorphous polyethylene terephthalate (abbreviated as amorphous PET)
Grade: PETG6763 (Eastman Chemical)
Density: 1270 kg / m ³
Intrinsic Viscosity / IV: 0.75
Vicat softening point: 85 ° C
Tensile modulus: 1760 MPa

(6) Polybutylene terephthalate (abbreviated as PBT)
Grade: 1209X01 (Toray Industries, Inc.)
Density: 1310 kg / m ³
Intrinsic Viscosity / IV: 1.0
Tensile modulus: 1500 MPa

(Configuration of the bite)

( Production method )
Co-extrusion molding method (Example 1 and Comparative Examples 1 and 2 are co-extrusion molding methods using two extruders, Examples 2 and 3 and Comparative Examples 3 and 4 are co-extrusion methods using three extruders. The molding method was performed. Moreover, as a result of manufacturing the articulating device by this manufacturing method, the articulating devices of Examples 1 to 3 were able to be stably manufactured.

[Test Example 1]
The occlusion device obtained in Examples 1 to 3 and Comparative Examples 1 to 4 is a commercially available three-side seal bag making machine (manufactured by Seibu Kikai Co., Ltd., using a separator when fusing the occlusion device to a film substrate). And a three-sided film base (including the occlusal crushing portion) to produce a packaging bag with an occlusal device of size 200 mm × 300 mm. .

  Further, (ii) aluminum cracking, (iii) occlusal crushing portion in the appearance state of the packaging bag with an occlusion device that is made into a bag by setting the fused state in the bag making to a temperature that is good outside the fused state (i) Comparison and evaluation of each item of pinholes and (iv) generation of flaws. The evaluation results of (i) are shown in Table 2, and the evaluation results of (ii) to (iv) are shown in Table 3, respectively.

(Structure of the film constituting the bag body)
A three-layer film (total thickness 70 μm) of polyethylene terephthalate (PET) (thickness 12 μm) / adhesive / aluminum foil (thickness 7 μm) / adhesive / linear low density polyethylene (LLDPE) sealant (thickness 50 μm) was used.

(I) Fusion state:
When the fusing temperature is 100 to 130 ° C., the fusing property between the bite and the bag body is confirmed by separating the fusing temperature at every 5 ° C. and peeling off with the fingertips, and compared according to the following criteria. ·evaluated.

(Criteria)
Judgment content ○: Cannot be peeled off.
Δ: Peelable with a strong force.
X: It can peel easily.

(Result of (i))

(Ii) Aluminum cracking:
The number of occurrences of cracks (in 10 bags) in the aluminum vapor deposition portion of the occlusal crushing portion in the manufactured packaging bag with an occlusion device was confirmed by visual observation, and compared and evaluated according to the following criteria.

(Criteria)
Judgment contents ○: The number of aluminum cracks is zero.
Δ: The number of aluminum cracks is 1 or more and less than 3.
X: The number of occurrences of aluminum cracking is 3 or more.

(Iii) Generation of pinholes:
The number of occurrences of pinholes in the vicinity of the bite crushing part of the manufactured packaging bag with bite was compared and evaluated using the following criteria.
The number of pinholes was confirmed by a commercially available ageless checker.

(Criteria)
Judgment content ○: The number of pinholes is zero.
Δ: The number of pinholes is 1 or more and less than 3.
X: The number of pinholes generated is 3 or more.

(Iv) Occurrence of soot:
The state of occurrence of wrinkles in the vicinity of the sealed portion of the manufactured packaging bag with a bite was confirmed by visual observation, and compared and evaluated using the following criteria.

(Criteria)
Judgment contents ○: Appearance is good with no wrinkles.
Δ: Slight wrinkles occur.
×: Many wrinkles occur and the appearance is poor.

(Results of (ii) to (iv))

As shown in Tables 2 and 3, the packaging bag with an articulating device provided with the biting device of the present invention obtained in Examples 1 to 3 does not have a pinhole in the fused portion, particularly in the vicinity of the biting portion crushing portion. In addition, it was a packaging bag with an occlusal device having good quality, having no appearance of wrinkles in the entire occlusion device, and excellent in appearance and function.
In addition, even when a film having an aluminum vapor deposition part is used as a film base material constituting a packaging bag, so-called aluminum cracking does not occur in the occlusal crushing part between the occlusion tool and the bag body. there were.

And since the base part encloses the core part as a packaging bag with an occlusion tool at the time of manufacture, the core part of Examples 1-3 does not peel a core part and a base part.
In particular, in the case of using the articulating device of Example 2 and Example 3 provided with a fusion part, low-temperature fusion with a fusion temperature of about 110 ° C. is possible, and the range of temperature conditions is wide. It was something that could be done.

  On the other hand, from the packaging bag with an occlusion device provided with the occlusion device of Comparative Examples 1 to 4, Comparative Example 1 in which the belt-like base is made of only linear low density polyethylene (LLDPE-1), and only from the low density polyethylene. In Comparative Example 2 that was not able to be fused in a low temperature region, aluminum cracks, a bite, and wrinkles in the vicinity thereof occurred.

  Further, Comparative Example 3 in which a fusion part of linear low density polyethylene (LLDPE-2) was formed with respect to Comparative Example 1, although the low-temperature fusion property was improved, there were some aluminum cracks, The bite and the wrinkles in the vicinity were also generated.

In Comparative Example 4 having the configuration of FIG. 8 (configuration disclosed in Japanese Patent No. 2847666), some aluminum cracks and pinholes were observed.
Thus, the packaging bag provided with the bite of the comparative example that does not have the requirements of the present invention was significantly inferior to the packaging bag provided with the bite of the example.

  The occlusion device and the packaging bag with an occlusion device of the present invention can be widely used as, for example, an occlusion device used for packaging various articles such as foods and medical products and a packaging bag including the occlusion device.

It is the front view which showed the one aspect | mode of the packaging bag with an occlusion tool of this invention. It is the figure which showed one Embodiment of the occlusion tool of this invention, Comprising: (A) is the state which the male member and the female member left | separated, (B) is sectional drawing which showed the state engaged. It is the figure which showed the other aspect of the occlusion implement of this invention, Comprising: It is sectional drawing which shows the state which formed the melt | fusion part with respect to the strip | belt-shaped base part. It is sectional drawing which showed the other aspect of FIG. It is the figure which showed another aspect of the articulation tool of this invention, Comprising: It is sectional drawing which shows the aspect which divided | segmented the core part. It is sectional drawing which showed the other aspect of FIG. It is sectional drawing which shows the structure of the conventional articulator. It is VIII-VIII sectional drawing of FIG. It is IX-IX sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Articulating tool 2 ... Bag-making fusion part (side seal part)
DESCRIPTION OF SYMBOLS 3 ... Occlusal crushing part 10 ... Occlusal part 11 ... Male member 12 ... Female member 13 ... Band-shaped base 14 ... Base part 15 ... Core part 16 ... Head 17 ... Connection part 18 ... 1st hook part 19 ... 2nd hook part 19 Hook part 20 ... bag main body 30 ... packaging bag with occlusal tool 40 ... fusion part

Claims (9)

An occlusal part and a bite formed of a pair of thermoplastic resin male and female members formed integrally with the occlusal part and composed of a belt-like base fused to the bag body ,
Only the band-shaped base part consists of a base part and a core part,
The core part has higher rigidity than the base part,
The articulating tool, wherein the base part wraps around the core part. The articulator according to claim 1,
The occlusion device, wherein the tensile elastic modulus of the resin of the core portion is 1.5 times or more of the tensile elastic modulus of the resin of the base portion. The articulating device according to claim 1 or 2,
The resin constituting the core part is a polyethylene (PE) resin, an ethylene-polar vinyl monomer copolymer, a polypropylene resin, a polyamide (nylon) resin, a crystalline polyester resin, a low crystalline or amorphous copolymer. One or more of the group consisting of polyester resin, polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polycarbonate (PC) resin, polystyrene (PS) resin, ethylene and cyclic olefin copolymer An articulator characterized by In the articulating device according to any one of claims 1 to 3,
The resin constituting the base portion is polyethylene having a density of 890 to 940 kg / m ³ , ethylene-α-olefin copolymer, ethylene-polar vinyl monomer copolymer, polypropylene resin, ionomer, ethylene-methacrylic acid copolymer An occlusal device characterized in that it is one or more of the group consisting of coalescence (EMAA). The articulating device according to any one of claims 1 to 4,
An occlusal device characterized in that a fused portion made of a resin having a melting point lower than that of the base portion is formed on the band-shaped base portion. The articulator according to claim 5,
The occlusion device, wherein the resin constituting the fused part is a linear ethylene-α-olefin copolymer having a density of 850 to 905 kg / m ³ . The articulator according to claim 5,
The resin constituting the fused part is one or more selected from the group consisting of an ethylene-polar vinyl monomer copolymer, an ethylene-propylene copolymer, and a propylene-butene-1 copolymer. Characteristic occlusal device. The articulator according to any one of claims 1 to 7,
The articulating tool, wherein the core part is divided.   9. A packaging bag with an articulation tool, wherein the articulation tool according to claim 1 is fused to a bag body.

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