WO2004031042A1

WO2004031042A1 - Clamping device, and packaging bag with clamping device

Info

Publication number: WO2004031042A1
Application number: PCT/JP2003/012592
Authority: WO
Inventors: Takehiro Iwamoto
Original assignee: Idemitsu Unitech Co., Ltd.
Priority date: 2002-10-01
Filing date: 2003-10-01
Publication date: 2004-04-15
Also published as: CN1720173A; JPWO2004031042A1; TW200406345A; CN100482545C; KR101000645B1; KR20050065570A; AU2003268719A1; JP4496079B2

Abstract

A clamping device (20) having a pair of male and female members (21) and (22) clamped with each other and installed along the peripheral edge of the opening part of a packaging bag, wherein at least either of the male member (21) and the female member (22) comprises shape holding parts (213, 223) extending along the extended direction of the clamping device (20), formed of a composition having the main components of a thermoplastic resin with benzene rings for main rings, and holding the opened shape thereof when installed on the packaging bag and when the packaging bag is unsealed, the opened state thereof is maintained by the shape holding parts (213, 223) and when sealed, the male member (21) and the female member (22) are clamped with each other, whereby a sealability can be assured.

Description

_Description

Articulator, packaging bag with articulator

The present invention relates to an articulation tool having a pair of male and female members that engage with each other, and a packaging bag provided with the articulation tool. Background art

DESCRIPTION OF RELATED ART Conventionally, the packaging bag with an articulation tool which fixed a pair of male and female members which engage with each other along the opening part peripheral edge of the packaging bag is known. According to the packaging bag with the occlusal tool, the contents of the food and the like can be stored by being released from the outside air by releasing the occlusion of the male and female members, storing the food and the like, and occluding the male and female members again. However, there is an advantage that contents such as food can be stored for a long time without deteriorating quality.

On the other hand, as another openable / closable packaging bag, there is known a technology in which an opening / closing member made of a metal strip is provided around the opening of the packaging bag (Japanese Utility Model Application Laid-Open No. 61-59560). . Such an opening / closing member can close or open the opening of the packaging bag by deforming the metal strip, and at the time of opening, the contents can be expanded by expanding the metal strip in an arc shape. There is an advantage that it can be easily taken out.

However, the above-mentioned conventional packaging bag with a jaw tool has a problem that it is difficult to maintain the shape at the time of opening because the opening portion is closed by the weight of the packaging bag at the time of opening.

Also, in the case of a packaging bag provided with a metal strip described in the above-mentioned Japanese Utility Model Application Laid-Open No. 61-59560, the packaging bag is closed due to deformation of the metal strip. There is a problem that tightness cannot be secured.

Furthermore, the packaging bag is usually made of thermoplastic resin such as polyethylene and polypropylene, and the metal strip is a dissimilar material.Therefore, according to recent separation and disposal, the metal strip must be removed from the packaging bag and discarded. There is a problem that it takes time for processing. In addition, a metal detector may be used in the inspection for contamination of food or the like, and a metal strip as described in Patent Document 1 reacts with the detector and cannot be used for a food packaging bag. There's a problem. Disclosure of the invention

A main object of the present invention is to provide a jig which can maintain the shape at the time of opening when attached to a packaging bag, can sufficiently secure sealing properties, and can save trouble of disposal. An object of the present invention is to provide a packaging bag with an articulation tool.

The jaw tool of the present invention is a jaw tool having a pair of male and female members that mesh with each other, and is attached along the opening periphery of the packaging bag, wherein at least one of the male member and the female member is the bite. Packaging bag that extends along the direction in which the components extend, as a thermoplastic resin having a benzene ring in the main chain, or a co-extruded thermoplastic resin having a benzene ring in the main chain, or as a multi-layered layer, It is characterized in that it is provided with a shape holding portion for holding the shape opened when it is attached to the device.

Here, the male member and the female member constituting the occlusal tool can be manufactured by extruding a polyolefin-based thermoplastic resin with a single-screw or twin-screw extruder or the like, and the material is used. It is appropriately selected according to the material of the packaging bag. For example, if the material of the film forming the packaging bag is polyethylene, it is preferable to use polyethylene as the material of the male member and the female member. If the material of the film is polypropylene, the male member and the female member are also polypropylene. It is preferred to employ

Further, as a material constituting the shape retaining portion, for example, polyethylene terephthalate (PET) is preferably used, and more preferably, low crystalline or amorphous polyethylene terephthalate is preferably used.

According to the present invention, at least one of the male member and the female member constituting the occlusal tool is provided with a shape retaining portion, so that when the opening of the packaging bag is greatly expanded at the time of opening, the open state is maintained as it is. By attaching such a jig to the packaging bag, the packaging bag can be easily taken out of the contents.

In addition, by providing a pair of male and female members that engage each other, By doing so, even once opened, the packaging bag can be resealed with sufficient sealing performance.

Further, since the shape holding portion is made of a thermoplastic resin or the like having a benzene ring in the main chain, all the materials including the shape holding portion can be made of resin, and the shape holding portion is removed and discarded. It is not necessary to do so, and the time and effort for disposal can be greatly reduced.

By adopting PET as the thermoplastic resin constituting the shape retaining portion, shape retention can be reliably realized by utilizing the toughness and plasticity of PET. In addition, by forming the shape-retaining portion with low-crystalline PET or amorphous PET, these PETs have a lower extrusion molding temperature than crystalline PET, so that polypropylene, polyethylene, etc. During co-extrusion molding with a thermoplastic resin, the temperature difference during extrusion is reduced, and seizure of polypropylene, polyethylene, etc. can be prevented.

In the above, it is conceivable to integrally form the above-described shape holding portion inside the male member and the Z member or the female member. Preferably, the shape holding portion is formed integrally inside the male member.

Here, the area ratio in the cross section of the outer peripheral resin such as polypropylene constituting the male member and / or the female member and the resin constituting the shape retaining portion is as follows: outer peripheral resin: shape retaining portion = 1: 9 to 9: It is preferred to be between 1. If it is out of this range, shape retention may be lost or resealability as an articulator may deteriorate.

By integrally forming the inside of the male member or the female member in this manner, the outer skin can secure the hermeticity by adopting an appropriate resin as the male member or the female member, and the shape holding property can be maintained by the inner shape. This can be realized by a holding unit. In addition, since the male member has a cross section including a bulging portion that meshes with the female member, the shape holding portion can be integrally formed inside the male member, which facilitates manufacture.

Further, when the male member and the female member are provided with a welding base that is welded to the inner surface of the film constituting the packaging bag, and an occlusal portion main body that stands upright from the welding base and engages with each other, the shape holding portion described above is used. Integrally formed on the weld base of male and female or female members +

In this case, the shape holding part is formed by extruding the shape holding part together with the welding base by coextrusion molding or the like into a film, or by laminating and bonding the film shape holding part to the belt-like welding base by lamination or the like. Is also good.

Even if the shape holding portion is formed in this manner, the same operation and effect as described above can be enjoyed, and the shape holding portion can be integrally formed so as not to interfere with the male member or female member's occlusion portion main body. Therefore, the degree of freedom of the occlusal shape is improved.

Further, when the shape holding portion is formed integrally with the welding base portion, it is preferable that the shape holding portion is formed at a position of the welding base portion away from the position where the occlusal portion main body is provided.

By forming the shape holding portion at a position away from the occlusion portion main body, when the occlusion portion main bodies of the male member and the female member bite each other, the occlusion portion main body is formed due to the toughness, plasticity, etc. of the shape holding portion. Since the occlusion between the members is not disturbed, the male member and the female member can be securely engaged and securely sealed.

One of the male member and the female member is made of a thermoplastic resin that forms the shape holding portion, and the other is made of a flexible thermoplastic resin that deforms following the occlusion. It is possible.

Here, as the flexible thermoplastic resin, it is preferable to employ a resin in which a modifying agent is blended as necessary with a polyolefin resin. For example, a resin in which a modifying agent is blended with polyethylene, polypropylene, or the like is used. Can be adopted. As the modifier, a propylene-ethylene random copolymer, an ethylene-α-olefin copolymer, an ethylene-polar vinyl monomer copolymer, an elastomer, or the like can be used.

According to the present invention, it is possible to impart toughness and plastic shape retention to one of the members by forming one of the members constituting the occlusal by using PET or the like. By forming this member from a flexible thermoplastic resin, the other member can follow the one member having the shape-retaining property, and the occlusion portion main bodies can be occluded. Accordingly, the object of the present invention is achieved by extruding each of the male member and the female member with a single material without the need for co-extrusion molding as described above. _g can be used as a jig which can be manufactured with higher efficiency.

Further, a packaging bag with an articulation tool according to the present invention includes the above-described articulation tool, and is characterized in that the articulation tool is attached along the periphery of an opening of the packaging bag. The packaging bag with the component can be suitably used as a packaging bag for hermetically enclosing and enclosing food, particularly liquid or semi-liquid food. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a front view showing the outer shape of the packaging bag according to the first embodiment of the present invention.

FIG. 2 is a sectional view showing the structure of the jaw tool in the embodiment.

FIG. 3 is a perspective view for explaining a method of using the packaging bag in the embodiment.

FIG. 4 is a perspective view for explaining a method of using the packaging bag in the embodiment.

FIG. 5 is a cross-sectional view showing the structure of the jaw according to the second embodiment of the present invention.

FIG. 6 is a cross-sectional view showing the structure of the jaw according to the third embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a structure of a jaw according to a fourth embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[First Embodiment]

FIG. 1 shows a packaging bag 1 with a jaw according to a first embodiment of the present invention. This packaging bag 1 is configured as a flat bag-shaped packaging bag, and a stretched or unstretched polypropylene film is used as a bottom of the folding bag at the center, and a side seal portion 11 is provided at a predetermined pitch on the laminated film 10. This is a polypropylene packaging bag having an opening 12 on the side opposite to the bottom on the lower side in the figure.

A jaw 20 according to the embodiment of the present invention is provided inside the peripheral portion of the opening 12. The jaw 20 has a portion 20 A intersecting with the side seal portion 11. Crushed. As shown in FIG. 2, the jaw tool 20 includes a pair of male and female members 21 and 22 that are welded to mutually facing surfaces inside the film 10. '

The male member 21 has a cross-section including a band-shaped base portion 211 welded to the inner surface of the film, and a male portion main body 2 1 2 having a circular cross-section that rises from the band-shaped base portion 2 1 1 and protrudes at the tip. Is a linear member made of polypropylene.

At the center of the circular shape at the tip of the male member 21, a shape-retaining portion 2 13 made of amorphous PET is formed integrally, and the extending direction of the male member 21 (perpendicular to FIG. 2) Direction).

The female member 22 includes a band-shaped base 221, similar to the male member 21 and a female part body 22 formed of a pair of occlusal pieces rising from the band-shaped base 221, and expanding outward at the center. It is a linear member made of polypropylene having a provided cross section.

Inside the band-shaped base 22 1 of the female member 22, a shape holding portion 2 23 made of the same amorphous PET as that of the male member 21 is integrally formed, and the extension of the female member 22 is formed. It extends along the exit direction.

Then, the male member 21 and the female member 22 are occluded by inserting the bulging portion of the male part main body 212 between a pair of occlusal pieces of the female part main body 222, and occluded. Thereby, the opening 12 of the packaging bag 1 can be closed.

In the case of manufacturing the jaw 20, for example, for the male member 21, two single-screw or twin-screw extruders are prepared, and a pellet mainly composed of amorphous PET is provided in one of the hobbers. The extrudate is injected while the amorphous PET is simultaneously extruded with a co-extrusion die that surrounds the polypropylene with pyrene.The extrudate is pulled down by a take-off device. Manufactured by cooling. The same applies to the case of the female member 22.

In such a packaging bag 1, the male member 21 and the female member 22 are welded to the inner surface side of the film 10 while the film 10 is half-folded at the center in the width direction. It is manufactured by performing welding at a predetermined pitch in the direction to form the side seal portion 11 and then fusing along the side seal portion 11. The heat seal temperature and seal time of the side seal section 11 are maintained at the intersection at 20 A. _? Part 21 3, 223 male member 21 including the temperature up to the female member 22 is crushed, is set as a time, taking care that there is no air leakage or the like at the intersection 2 OA.

When such a packaging bag 1 is used, after separating the male member 21 and the female member 22 of the jaw 20, for example, as shown in FIG. 3, a film 10 provided with a male member 21 is provided. Expand the area near the opening 12 of the container and take out the contents stored inside the packaging bag 1. At this time, since the male member 21 has the shape holding part 2 13 integrally formed therein, the expanded shape is maintained, and even if a hand or the like is put inside the packaging bag 1, the shape of the packaging bag 1 is maintained. The contents can be taken out without touching the inner surface.

After use, as shown in Fig. 4, the female member 22 is fitted to the male member 21, the opening 12 of the packaging bag 1 is sealed with the jaws 20, and then pressed down from above to flatten it. By doing so, it can be hermetically sealed.

According to the first embodiment, the following effects can be obtained.

Since the male member 21 and female member 22 of the jaw 20 are provided with the shape retaining portions 21 3 and 223, respectively, when the opening 12 of the packaging bag 1 at the time of opening is greatly expanded to the outside, the open state remains as it is. Therefore, by attaching such a jig 20 to the packaging bag 1, the packaging bag 1 from which contents can be easily taken out can be obtained. Further, by providing the pair of male and female members 21 and 22, even after the packaging bag 1 is once opened, the sealing performance can be ensured and the packaging bag 1 can be sealed again.

Further, since the shape holding portions 2 13 and 223 are composed of a composition mainly composed of amorphous PET, the material of the jaw 20 including the shape holding portions 21 3 and 223 is entirely made of resin. It is not necessary to remove and retain the shape holding portions 213 and 223, and it is possible to greatly reduce the time and effort for disposal.

Further, by forming the shape holding portions 2 13 and 223 from amorphous PET, shape holding at the time of opening can be reliably realized by utilizing the toughness and plasticity of PET.

In addition, since amorphous PET is used for the material of the shape holding parts 213 and 223, the extrusion temperature of amorphous PET is lower than that of crystalline PET, so that PP, PE, etc. Reduced temperature difference during extrusion during co-extrusion with thermoplastic _It can prevent seizure of PP and PE due to co-extrusion.

Furthermore, by forming the shape retaining portions 2 1 3 and 2 2 3 integrally inside the male and female members 2 1 and 2 2, the outer skin portion engages with the male main body 2 1 2 and the female main body 2 2 2. By adopting a suitable resin such as PP or PE, the sealing property can be ensured, and the shape holding property can be realized by the internal shape holding sections 2 1 3 and 2 3. In particular, since the male member 21 can be integrally formed with the shape retaining portion 2 13 inside the male portion main body 2 12 including the bulging portion that engages with the female member 22, the shape retaining portion 2 13 is exposed to the outside. And it is easy to manufacture. According to such a packaging bag 1, since the opening shape at the time of opening can be maintained by the shape holding portions 2 13 and 2 23, and it can be sealed again after opening with the occlusal tool 20, In particular, it can be suitably used as a packaging bag for liquid or semi-liquid foods.

[Second embodiment]

Next, a second embodiment of the present invention will be described. In the following description, portions that are the same as or similar to those already described are denoted by the same or similar reference numerals, and descriptions thereof are omitted or simplified.

In the above-described first embodiment, as shown in FIG. 2, the shape holding portion 2 13 of the male member 21 is formed inside the male portion main body 2 12, and the shape holding portion 2 of the female member 22 is formed. 23 is formed inside the strip-shaped base 2 21, and these are formed by co-extrusion molding the male member 21 and the female member 22 simultaneously with the shape holding portions 2 1 3 and 2 2 3. It was configured to be.

On the other hand, as shown in FIG. 5, the jaw tool 30 according to the second embodiment has a shape holding portion 313 formed on the band-shaped base 311 of the male member 31 and a female member. The difference is that the shape holding part 3 23 is formed on the belt-like base 32 2 of 32.

The male member 31 and the female member 32 are co-extrusion-molded into the male member 31 and the female member 32 in the same manner as in the first embodiment. Can be integrally formed, but can also be manufactured by other methods.

That is, first, the shape-retaining portions 3 13 and 3 23 made of amorphous PET were _g

It is extruded into a tape shape in a shape corresponding to the width of 3 1 1 and 3 2 1.

Next, the occlusal tip including the male body 3 1 2 and the occlusal tip including the female body 3 2 2 are extruded respectively, and the same PP as the male 3 1 and female 3 2 The base end portions of the shape retaining portions 3 13 and 3 23 are extruded into a tape shape using a material such as PE.

The three components are glued together with an adhesive, adhesive, etc., and integrated. At the time of integration, each member with adhesive applied to the joint surface is laminated and arranged, and the male member 3

1, A pair of pedestals are arranged in the extending direction of the male member 31 and the female member 32 so as to surround the female member 32, and pressed by a heat seal bar from the outside of the proximal tape member to laminate. can do.

According to the second embodiment, the following effects are obtained in addition to the effects described in the first embodiment.

That is, since the shape retaining portions 3 1 3 and 3 2 3 can be integrally formed so as not to interfere with the male portion main body 3 1 2 of the male member 3 1 and the female portion main body 3 2 2 of the female member 3 2, the male portion main body 3 2 12. The occlusal shape of the female part main body 3 2 2 can be set without being restricted by the shape retaining sections 3 2 3 and 3 2 3, and the degree of freedom of the occlusal shape is improved.

Also, by forming the shape holding parts 3 13 and 3 23 separately from each other and integrating them later by lamination or the like, the male body 3 1

2. Since the female part body 3 2 2 can be extruded and then laminated and bonded, there is no need to use a dedicated extrusion mold, etc., reducing production costs and widely applying to existing articulation tools. Thus, shape retention can be imparted.

In addition, since the shape holding portions 313 and 32.3 are not integrally formed inside the male body 312 and the female body 322, the male body 3 2. When the female part main body 3 2 2 is crushed, it can be performed at a normal temperature and a sealing time, and it is possible to manufacture the jaw 30 having shape retention without impairing productivity. You.

[Third embodiment] Next, a third embodiment of the present invention will be described.

The above-described jaw 30 according to the second embodiment includes a shape holding portion 3 1 3 and 3 2 over the entire band-shaped base 3 11 of the male member 3 1 and the band-shaped base 3 2 1 of the female member 3 2. 3 had formed body.

On the other hand, as shown in FIG. 6, the male member 41 constituting the jaw 40 according to the third embodiment has a shape holding portion 4 13 formed on a part of the band-shaped base 4 11. Are different. Although not shown, the female member that constitutes the jaw 40 can also form a shape holding portion in the same manner.

The shape retaining portion 4 13 of the male member 41 is located at a position away from the position where the male main body 4 12 of the band-shaped base 4 11 is provided, that is, the occlusion required for the male main body 4 12. A shape holding portion 413 is formed at a position avoiding a portion of the band-shaped base portion 411 which requires flexibility to ensure easiness.

As in the case of the first embodiment, such an occlusal tool 40 is formed by co-extrusion of amorphous PET constituting the shape retaining portion 413 and PP, PE, etc. constituting the male member 41. It can be manufactured by molding.

When such a jaw 40 is attached to the periphery of the opening of the packaging bag, the portion where the shape holding portion 4 13 is formed is located on the edge of the opening, and the male body 4 12 has this shape. Attach it so that it is inside the holding part 4 13.

At the time of opening the packaging bag, the contents are taken out while maintaining the open state by the shape retaining section 413, and at the time of closing, the flexible male member 41 and the female member (not shown) are deformed and sealed. I do.

According to such a third embodiment, the following effects are obtained in addition to the effects described in the first embodiment.

That is, since the shape holding portion 4 13 is formed at a position away from the male portion main body 4 12, when the male member 4 1 and the female member are fitted together, the shape holding property of the shape holding portion 4 13 The occlusal tool 40 can be made difficult to occlude, and can be easily occluded, and also has shape retention. [Fourth embodiment]

Next, a fourth embodiment of the present invention will be described.

In each of the embodiments described above, the male members 21, 31, 41, and the female members 22, 32 constituting the jaws 20, 30, 40 are partially provided with the shape retaining portions 213, 223, 313, 323, 41 3 were formed physically.

On the other hand, as shown in FIG. 7, in the jaw 50 according to the fourth embodiment, the male member 51 and the female member 52 are each made of a single material, of which the male member 51 However, the difference is that the female member 52 is made of a flexible soft thermoplastic resin that can follow the deformed state of the male member 51. Then, the male member 51 itself plays a role of a shape holding unit.

The male member 51 includes a belt-shaped base portion 511 and a male portion main body 5112, and is formed by extruding an amorphous PET as a main raw material using a single-screw extruder or the like.

The female member 52 includes a belt-shaped base 521 and a female body 522. It is similarly extruded from a flexible soft thermoplastic resin containing a polyolefin resin such as syrup and the like as a main component and, if necessary, a modifier.

When attaching the male member 51 and the female member 52 to the film 10 constituting the packaging bag, the female member 52 can be easily attached by a conventional heat seal. The male member 51 has a higher melting temperature than the thermoplastic resin constituting the film 1Q, and if heat sealing is performed at the melting temperature of the male member 51, the film 10 may be seized. The space between the films 10 is fixed with an adhesive or the like.

According to the fourth embodiment described above, the following effects are obtained in addition to the effects described in the first embodiment.

That is, since the male member 51 is made of amorphous PET and the female member 52 is made of a soft resin mainly composed of PP or the like, each can be manufactured by the usual method of extrusion of a jaw tool. Therefore, the occlusal tool 50 can be manufactured efficiently.

In addition, the male member 51 is made of amorphous PET, and the female member 52 is made of soft resin, so that the male body 51 of the male member 51 and the female body of the female member 52 are formed. Five ^

Since the occlusal device 50 can be brought into close contact with the occlusal device, the sealing performance of the occlusal device 50 may not be impaired.

[Modification of Embodiment]

Note that the present invention is not limited to the above-described embodiments, but includes the following modifications.

In the first to third embodiments described above, the male members 21, 31, 41, and the female members 22,

Although shape holding portions 2 13, 2 23, 3 13, 3 2 3, and 4 13 were formed in each of 3 2 and 4 2, the present invention is not limited to this. That is, the object of the present invention can be achieved even if the shape holding portion is formed only on one of the male and female members constituting the jaw tool. Further, in each of the above embodiments, amorphous PET is employed as a material for forming the shape holding portion. However, the material for the shape holding portion may be a composition containing amorphous PET as a main component. A low crystalline PET may be obtained by increasing the blending of the crystalline PET. Further, the present invention is not limited to this, and crystalline PET may be adopted as long as it can be extruded. In short, if a thermoplastic resin having a benzene ring in the main chain and capable of ensuring shape retention can be used, Various things can be adopted.

Specifically, for example, polybutylene terephthalate, polycarbonate, polyester polycarbonate, polyphenylene oxide, polyphenylene sulfide, and the like can be used.

Further, in the first embodiment, the cross-sectional shape of the occlusal tool 20 is such that the distal end portion of the male part main body 212 bulges in a circular shape, and the female part main body 222 has a pair of occlusal pieces that wrap it. However, the present invention is not limited to this. In short, the present invention can be applied to various types of occlusal shapes that can ensure the sealing performance. In addition, the specific structure, shape, and the like at the time of carrying out the present invention are different from other structures, etc., as long as the object of the present invention can be achieved.

[Example]

Example 1; Regarding the male member 21 and the female member 22 constituting the jaw 20 of the first embodiment, the resin constituting the shape holding portions 213 and 223 is made of amorphous PET (PETG676 3 of Ysman Chemical Co., Ltd.). The resin constituting the surrounding male member 21 and female member 22 was co-extruded using random polypropylene (RPP: Idemitsu Petrochemical Co., Ltd. F-744NP)), and the male member 21 and female member 22 were extruded. The extrusion conditions of each extruder for amorphous PET and RPP are as shown in Table 1.

Example 2;

The resin composing the shape retaining portions 213 and 223 was changed to crystalline PET, and the extrusion temperature was increased by about 20 ° C for each zone. Otherwise, the male member 21 and the female member 22 were extruded under the same conditions as in Example 1.

Example 3;

The male member 31 and the female member 32 of the jaw 30 according to the second embodiment were extruded under the same material and extrusion conditions as in Example 1.

Examples 4 to 6;

Regarding the male member 21 and the female member 22 in the second embodiment, by changing the area ratio of the shape holding portions 213 and 223 with respect to the cross-sectional area of the male member 21 and the female member 22, a plurality of types of male members are provided. The female member 22 was extruded. The materials, molding conditions, etc. are the same as in the first embodiment. Table 2 shows the area ratios of the male and female members 21 and 22 in Examples 4 to 6. Table 2

Comparative Example 1

In Example 1, the same conditions as in Example 1 were used, except that the resin constituting the shape holding portion 21 was changed to polyamide (Ny6: Ube Industries, Ltd. 178 £ Nylon 1022). The male member 21 and the female member 22 were extruded. Table 3 shows the nylon extrusion conditions.

Table 3

Comparative Example 2;

The male member and the female member were extruded with only the RPP used in Example 1. Table 4 shows the extrusion molding conditions at this time.

Table 4

Bag making method The male member and the female member obtained in Examples 1 to 6, Comparative Example 1 and Comparative Example 2 were each welded to a film made of non-stretched PP with a heat seal bar. The side seal portion 11 was formed, and the intersection 20 A was crushed with a seal bar to produce a two-sided seal flat packaging bag 1. The temperature at which the intersection 2OA was crushed with a seal bar was set at 150 ° C., and the number of shots was 30 shots / min. Evaluation method;

(1) Shape retention

Open the obtained packaging bag, make a fold on the jig at the approximate center of the opening of the packaging bag, lay it flat, and observe the state after 1 minute to evaluate the shape retention. went. In the evaluation, “〇” indicates that the contents can be easily removed with one hand without expanding the opening of the packaging bag, and “X” indicates that the contents cannot be removed without using both hands.

(2) Resealability

A powdery or lumpy solid was placed inside the packaging bag, and the male member was re-engaged with the female member to evaluate the resealability. In the evaluation, when the resealed packaging bag was turned upside down, the content did not fall out, and the case was spilled.

(3) crushability

The crushability of the jig was evaluated based on the appearance of the intersection part after the side seal of the packaging bag and the leakage of the seal at this part. The evaluation was rated as “A” where the appearance of the intersection was good and there was no seal leakage, “B” where the appearance was poor but there was no leakage, and “X” when the appearance was poor and there was leakage.

Table 5 shows the above results. Table 5

Evaluation results;

In Examples 1 to 6, it was confirmed that since the shape holding portions were integrally formed on the male member and the female member, the state where the opening was expanded was maintained, and it was easy to take out the contents at the time of opening. . In addition, in Example 6, although there was some defect in appearance, no seal leakage occurred, and it was recognized that the material had sufficient crushability.

On the other hand, in Comparative Example 1, since the polyamide was used as the shape retaining portion, it was not possible to maintain sufficient shape retention, and it was confirmed that the content was unsuitable for taking out the contents. Further, it was confirmed that Comparative Example 2 did not have a shape retaining portion, and thus did not have a shape retaining property and could not retain an opening shape. Industrial applicability

INDUSTRIAL APPLICABILITY The present invention can be used as an articulation tool having a pair of male and female members that mesh with each other, and as a packaging bag with an articulation tool provided with this articulation tool, and can be used as a packaging bag for foods and the like.

Claims

The scope of the claims

1. A jaw tool having a pair of male and female members that mesh with each other and attached along the periphery of the opening of the packaging bag.

At least one of the male member and the female member extends along the direction in which the jig extends and shares a thermoplastic resin having a benzene ring in the main chain or a thermoplastic resin having a benzene ring in the main chain. An occlusal tool comprising: a shape extruding layer or a multi-layered structure, and a shape holding portion for holding an opened shape when attached to a packaging bag.

2. In the jaw according to claim 1,

The shape retainer is formed integrally with the male member, the Z member, or the female member.

3. In the jaw according to claim 2,

The shape retainer is formed integrally with the inside of the male member.

4. The jaw according to claim 1,

The male member and the female member each include a welding base welded to the inner surface of the film constituting the packaging bag, and an occlusal portion main body erected from the welding base and engaged with each other. A jaw tool formed integrally with the male member and Z or the welding base of the female member.

5. The jaw according to claim 4,

The occlusal tool, wherein the shape holding portion is formed at a position of the welding base portion away from a position where the occlusal portion main body is provided.

6. The jaw of claim 1,

One of the male member and the female member is made of a thermoplastic resin forming a shape holding portion,

One of the other is an articulation tool characterized by being made of a flexible thermoplastic resin which deforms following the occlusion.

^7. A packaging bag with an articulation tool, comprising the articulation tool according to any one of claims 1 to 6.