TW200406345A - Clamping device, and packaging bag with clamping device - Google Patents

Abstract

Disclosed is a clamping device (20) having a pair of male and female members (21) and (22) engageable with each other and installed along a peripheral edge of an opening part of a packaging bag, wherein at least one 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) engage with each other, whereby a sealability can be assured.

Description

200406345 (1) 发明. Description of the invention [Technical field to which the invention belongs] The present invention relates to an articulator having a pair of male and female members that engage with each other 'and a packaging bag with the articulator provided with the d-parent assembly. [Prior art]

Conventionally, there has been known a packaging bag with a bite that holds a pair of male and female members along the periphery of the opening of the packaging bag. According to the packaging bag with the bite, 'the bite of the male and female members can be released by holding the male and female members, and the food can be stored again. The male and female members can be bitten again'. The quality of the contents, such as food, can be stored for a long time. On the other hand, for other packaging bags that can be opened and closed freely, there is known a technology in which a metal strip opening and closing member is provided along the periphery of the opening portion of the packaging bag (Japanese Patent Publication No. 6 1 -5 95 60, etc.). .

Such an opening and closing member has the advantage that the metal strip can be deformed, occluded, or unpacked. When unpacking, the metal strip can be taken out into an arc shape, and the contents can be easily taken out. However, since the conventionally known packaging bag with an occluder occludes the contents due to the weight of the packaging bag when it is unpacked, there is a problem that it is difficult to maintain the shape at the time of unpacking. Further, the aforementioned Japanese Patent Application Publication No. 61-5 95 60 discloses that a metal bag-equipped packaging bag is formed by deforming a metal bar to close an opening portion, so that there is a problem in that the sealing performance during resealing cannot be ensured. Furthermore, because the packaging bag is made of general thermoplastic resin such as polyethylene, polypropylene, etc., 4- (2) (2) 200406345 is a member different from metal strips. Therefore, from the individual waste in recent years, it is necessary to start from The metal strip is unloaded from the packaging bag and discarded, which is troublesome for disposal. In addition, metal detectors are often used for intrusion inspection of foreign objects in food. The metal strip of Patent Document 1 mentioned above has a problem that it cannot be used in food packaging bags because it reacts to the detector. [Summary of the Invention] The main object of the present invention is to provide a bite which can maintain the shape when it is unpacked when installed in a packaging bag, and can fully ensure the sealing property. Furthermore, the bite is not troublesome in disposal and has a bite Packing bag. The bite of the present invention is a bite having a pair of male and female members that are engaged with each other and installed along the opening periphery of the packaging bag, and is characterized in that at least one of the male member and the female member is provided with The extension direction is based on a thermoplastic resin having a benzene ring in the main chain, or a layer co-extruded as a thermoplastic resin having a benzene ring in the main chain, or as a layer of a multi-layer member, which is installed in a package. After the bag, a shape holding portion that can hold the shape after opening. Here, the male member and the mother member constituting the bite can be manufactured by extrusion molding of a thermoplastic polyolefin resin using a uniaxial or biaxial extruder, and the material is appropriately selected according to the material of the packaging bag to be used. For example, 'If the material of the film constituting the packaging bag is polyethylene, preferably polyethylene is also used as the material of the male member and the mother member. If the material of the film is polypropylene,' preferably ', the male member and the mother member are also polymerized. Acrylic. -5- (3) (3) 200406345 Also, for example, it is preferable to use polyethylene terephthalate (PET) as the material for forming the shape retaining portion. Preferably, low-crystalline or amorphous poly-p-phenylene can be used. Diethyl diformate. According to the present invention having such a structure, since at least one of the male member or the female member constituting the articulator is provided with a shape holding portion, the original opening state can be maintained by opening the packaging bag at the time of unpacking. By attaching such a bite to a packaging bag, a packaging bag that can easily take out the contents can be made. In addition, by having a pair of male and female members engaged with each other to engage them, once the package is unsealed, the sealing property can be ensured and the packaging bag can be sealed again. In addition, the shape retaining portion is made of a thermoplastic resin having a benzene ring in the main chain, and the material containing the shape retaining portion can be made entirely of resin. The shape retaining portion does not need to be removed and discarded, which greatly reduces the time of disposal. Procedures. In addition, by using PET as the thermoplastic resin constituting the shape-retaining portion, the toughness and plasticity of PET can be used to reliably realize the shape-retaining portion. In addition, by forming the shape-retaining portion with low-crystalline PET or amorphous PET, the extrusion molding temperature of these PETs is lower than that of crystalline PET, which makes them thermoplastic with polyethylene, polypropylene, and the like constituting the articulator. In the case of co-extrusion, the temperature difference at the time of extrusion becomes small, so that scorching of polypropylene, polyethylene, etc. can be prevented. In the above configuration, it is considered that the aforementioned shape retaining portion is integrally formed inside the male member and / or the female member, and preferably, it can be integrally formed inside the male member. -6- (4) (4) 200406345 Here, the ratio of the cross-sectional area of the peripheral resin such as polypropylene constituting the male member and / or the parent member to the resin constituting the shape retaining portion is the peripheral resin: shape retaining portion 2: 1: 9 It is preferably between 9 and 1; if it is outside this range, the shape retention property may be lost or the resealability of the bite may be deteriorated. By integrally forming the inside of the male or female member in this way, the skin can be made of a resin suitable for the male or female member to ensure tightness and shape retention can be achieved by the internal shape retaining portion. In addition, since the male member has a bulged portion that engages with the female member, the shape holding portion can be integrally formed inside the male member, which is easy to manufacture. In the case where the male member and the mother member are provided with a welded base that is welded to the inner surface of the film constituting the packaging bag, and the occlusal portion body that is erected from the welded base to form a mesh with each other, it is also considered to integrally form the aforementioned shape retaining portion on the young member and / Or the welded base of the mother component. In this case, the shape-retaining portion may be extruded into a film shape together with the welding base by co-extrusion, or the film-like shape-retaining portion may be laminated and attached to the tape-shaped welding base by lamination or the like. And integration. Even if the shape-retaining portion is formed in this way, the same functions and effects as those described above can be enjoyed, and the shape-retaining portion can be integrally formed without interfering with the male or female member, thereby increasing the degree of freedom of the bite shape. Furthermore, in the case where the shape holding portion is integrally formed on the welding base, it is preferable that the shape holding portion is formed at a position deviated from the position where the engaging portion body of the welding base is provided. The shape retaining portion is formed at a position that is biased away from the occlusal portion body in this way. When the occlusal portion body of the male member and the female member is engaged, the shape of the retaining portion is not stable due to the shape of the -7-(5) 200406345 retaining portion. Since the occlusion of the occlusal portion body is prevented, the occlusion of the male member and the mother member can be reliably performed, and the sealing can be surely performed. Either one of the male member and the mother member is constituted by a thermoplastic resin constituting the shape-retaining portion, and either one is constituted by a flexible thermoplastic resin that deforms during the engagement with the other.

Here, it is preferable to use a thermoplastic resin that is provided with a reformer in a polyethylene-based resin as required. For example, it can be used with a reformer in polyethylene, polypropylene, and the like. The reformer may be a polypropylene-ethylene random copolymer, an ethylene-α-olefin copolymer, an ethylene-polar ethylene monomer-copolymer, rubber, and the like.

According to the present invention, by forming one member of the articulator with PET or the like, it is possible to impart toughness and plastic shape retention to the one member, and to form the other member with a flexible thermoplastic resin. This other member yields to a member having a shape-retaining property, and engages the bite body. Therefore, it is not necessary to perform co-extrusion molding as described above, and the male member and the mother member can be separately extruded from a separate material to achieve the cost-effective articulator, which can be manufactured with higher efficiency. In addition, the packaging bag with an engaging device of the present invention is characterized by having the aforementioned engaging device and installing the engaging device along the periphery of the opening portion of the packaging bag. Such a packaging bag with an engaging device is suitable for hermetically sealing food, especially It is a packaging bag for liquid and semi-liquid food. [Embodiment] [The best mode for carrying out the invention] -8- (6) (6) 200406345 The following describes the embodiment of the present invention based on the drawings. [First Embodiment] Fig. 1 shows a packaging bag with a bite according to a first embodiment of the present invention. This packaging bag is arranged in a flat bag-shaped packaging bag, which is formed by folding or extending the central portion of a polypropylene film to form the bottom of the bag, and forming a side seal portion 11 at a predetermined distance from the overlapping film. The opposite side of the lower bottom in the drawing is a polypropylene packaging bag with an opening 12. Further, an engaging device 20 according to the embodiment of the present invention is provided inside the peripheral portion of the opening portion 12, and the engaging device 20 is flattened at a portion 20A that crosses the side seal portion 11. As shown in FIG. 2, the articulator 20 includes a pair of male and female members 21 and 22 fused to the facing surfaces of the film 10. The male member 21 is made of polypropylene having a cross-section of a strip-shaped base 2 1 1 ′ fused to the inner surface of the film, and a strip-shaped base 2 1 1 standing upright, and a male body 2 1 2 having a circular cross-section bulging at the front end. Linear members. An amorphous PET shape-retaining portion 2 1 3 is integrally formed on the circular central portion of the front end portion of the male member 21, and extends along the extending direction of the male member 21 (the direction orthogonal to the paper surface in the second figure). extend. Like the male member 21, the female member 22 is made of polypropylene and has a female body 222 formed of a pair of engaging pieces that have a belt-shaped base 2 2 1 in section and a pair of engaging pieces that have been erected from the belt-shaped base 2 2 1 and expanded outward at the center. Linear members. As in the case of the male member 21, the strip-shaped base portion of the mother member 22-9-(7) (7) 200 406 345 221 is formed integrally with an amorphous pet shape retaining portion 223, and extends along the extending direction of the mother member 22 Stretch. In addition, the male member 21 and the female member 22 are inserted into a pair of engaging pieces of the female body 222 by inserting the bulging portion of the male body 2 1 2, and the opening of the packaging bag 1 can be closed by the engagement. 1 2. In the case of manufacturing the articulator 20, for example, if it is a male member 21, two uniaxial or biaxial extrusion molding machines are prepared, and pellets whose main component is amorphous PET are put into a hopper, and polypropylene is put into In another hopper, the amorphous PET was extruded at the same time by a coextrusion die surrounded by polypropylene, and the extrudate was pulled down with the exit device while the extrudate was cooled, thereby manufacturing. The same applies to the base member 2 2. This type of packaging bag 1 folds the film 10 in half at the center in the width direction, and welds the male member 21 and the mother member 2 2 on the inner side of the film 10 'hereafter' along the width direction of the film 10, Fusion welding is performed at a predetermined pitch to form the side edge sealing portion 11, and the side edge sealing portion ii is further fused to be manufactured. In addition, the heat-sealing temperature and sealing time of the side seal portion 11 are set to the temperature and time until the male member 21 and the mother member 22 of the shape holding portions 213 and 223 including the amorphous PET at the crossing portion 20A are flattened. And pay attention to avoid air leakage at the cross section 20A. In the case of using such a packaging bag, after the male member 21 and the female member 22 of the articulator 20 are separated, for example, as shown in FIG. 3, the opening film 1 is provided with the male member 21 and the opening 1 2 is provided. Nearby, take out the contents stored in the packaging bag 1. At this time, since the shape retaining portion 2:! 3 is integrally formed inside the male member 2 i, the shape is maintained to be open, and even if a hand or the like enters the inside of the packaging bag 1, -10- (8) 200406345 the hand will not touch the packaging The contents of the bag 1 can be taken out. After use, as shown in Fig. 4, the female member 22 is fitted at 21, and the opening 12 of the packaging bag 1 is sealed by the bite 20, and thereafter flattened, thereby sealing it. According to this first embodiment, the following effects are obtained. Since the male member 21 and the female member 2 of the articulator 20 are divided into two shape retaining members 2 1 3 and 223, when the package is unpacked, one of the packaging bags 1 and 12 are opened to the outside to maintain this. The opening state, so that by using the bite 20 in the packaging bag 1, it is possible to make the content 10 easily. By providing a pair of male and female members 21 and 22, it is also possible to ensure the sealing after the packaging bag 1. , And reseal the packaging bag 1. Furthermore, the composition-like holding portions 213 and 223 containing amorphous PET as the main component can be made entirely of resin. The shape holding portions 213 and 223 can be made entirely of resin, and the shape holding portions 2 2 3 need not be removed and discarded. , Can greatly reduce the procedures at the time of disposal. In addition, since the shape holding portion 2 2 3 is made of amorphous PET, the toughness and plasticity of P E T can be utilized, and the retention at the time of unpacking can be surely achieved. Furthermore, by using amorphous PET as the shape retaining portion 2 1 3, the material can be made by extrusion molding of amorphous PET rather than crystalline PET, so that thermoplastic materials such as PP and PE constituting the occlusal joint 20 can be used together. The temperature difference during extrusion is small, which can prevent the burning of PP and PE at the same time. Male member, install this packaging bag from the opening provided separately. The temperature of the shape of 223, 213, and 223, which are unpacked, is reduced to -11-(9) 200406345. The shape holding part is further integrated. 213 and 223 are inside the male and female members 2 1 and 22, and the skin part can be made of PP, PE and other resins suitable for the male body 2 1 2 and the female body 222 to ensure sealing and shape retention. The shape retaining portions 2 1 3 and 223 are implemented. Particularly, since the male member 21 can form the shape retaining portion 2 1 3 as a single body inside the male body 2 1 2 including the bulging portion that engages with the female member 22, the shape retaining portion 2 1 3 is difficult to expose the outside. Also easy to manufacture.

In addition, according to such a packaging bag 1, since the shape of the opening at the time of unpacking can be maintained by the shape retaining portions 213 and 223, and can be resealed after being unsealed by the bite 20, it can be suitably used as food, etc., especially Packaging bags for liquid, semi-liquid food. [Second Embodiment] Next, a second embodiment of the present invention will be described. And in the following description, the same or similar parts are marked with the same or similar parts as those described above, and the description is omitted or simplified. In the aforementioned first embodiment, as shown in FIG. 2, the shape holding portion 213 of the male member 2 j is formed inside the male body 212, and the shape holding portion 223 of the female member 22 is formed inside the band-shaped base 221. It is formed by mutual aid molding while the male member 21 and the mother member 22 are molded, and the shape-retaining portions 213 and 223 are formed. In contrast, as shown in FIG. 5, the bite 20 of the second embodiment is different in that the shape holding portion 3 1 3 is formed on the strip-shaped base portion 311 of the male member 31 and the shape holding portion 3 2 3 is formed The strip-shaped base part of the mother member 32-12- (10) (10) 200 406 345 321 〇 This male member 3 1 and the mother member 3 2 can be formed integrally by co-extrusion, as in the case of the first embodiment. The shape-retaining portion 3 1 3 ′ 323 is inside the male member 31 and the female member 3 2, however, it may be manufactured by other methods. That is, first, the shape holding portion 3 1 3, 3 2 3 made of amorphous PET is extruded into a tapered shape in a shape corresponding to the width dimension of the strip-shaped base portions 3 1 1 and 3 2 1. Next, the occlusal front end portion including the male body 3 1 2 and the occlusal front end portion including the female body 3 22 are respectively extruded, and the same PP, Materials such as PE extrude the base-end-side portions of the shape retaining portions 3 1 3, 3 2 3 into a cone shape. The completed three components are adhered with an adhesive, an adhesive, and the like, so that they are integrated. In addition, in the case of integration, each member coated with an adhesive on the joint surface is arranged in a stack, and a pair of male members 3 1 and 32 are arranged around the male member 31 and the female member 3 2 in the extending direction. The seat can be pressed and laminated from the outside of the base end side tapered member by a heat sealing rod. According to this second embodiment, in addition to the effects described in the first embodiment, it has the following effects. That is, since the shape holding portion 3 1 3, 3 2 3 can be integrally formed so that it does not interfere with the male body 3 1 2 of the male member 3 1, the female body 3 2 2 of the female member 3 2, it is possible to The shape of the male body 3 1 2 and the female body 3 22 is set not to be restricted by the shape holding portion 3 1 3, 3 2 3, and the degree of freedom of the occlusal shape is improved. -13- (11) (11) 200406345 In addition, the shape-retaining portion 3 1 3, 3 23 is formed by another individual, and then integration is performed by lamination or the like, and extrusion molding using an extrusion molding die of a conventional bite is used to form the bite. The male body 3 1 2 with the female body 3 2 and the female body 3 2 2 can be laminated and bonded afterwards. Therefore, it is not necessary to use a special extrusion molding die, etc., and the manufacturing cost can be reduced, and it can be widely applied to both It has a bite and gives shape retention. Further, since the shape retaining portions 313 and 3 2 3 are not integrally formed on the male body 3 1 2 and the female body 3 2 3, the male body 312 and the female body 3 are flattened by the side seals during bag making. On the occasion of “22”, it can be performed at normal temperature and sealing time without compromising productivity, and it is possible to manufacture the articulator 30 having shape retention. [Third Embodiment] Next, a third embodiment of the present invention will be described. The entire band-shaped base 3 1 1 of the male member 31 and the band-shaped base 3 2 1 of the female member 3 2 of the second embodiment integrally form a shape holding portion 3 1 3, 3 2 3. In contrast, as shown in Fig. 6, the male member 41 constituting the bite 40 of the third embodiment is different in that the shape holding portion 4 1 3 is formed in a part of the band-like base portion 4 1 1. In addition, although the illustration is omitted, the mother member constituting the articulator 40 also forms a shape retaining portion in the same manner. The shape retaining portion 4 1 3 of this male member 41 is located at a position deviating from the male body 4 1 2 of the strip-shaped base 4 1 1, that is, to avoid the necessary bite to ensure the male member 4 1 2 The easy-to-use flexible band-like base 4 1 11-14 (12) (12) 200,406,345 positions form the shape retaining portion 4 1 3. Moreover, such an engaging device 40 can be manufactured by co-extrusion to form the amorphous ρ E τ of the shape holding portion 4 1 3 and P P, P E and the like constituting the male member 41 by co-extrusion. In addition, when attaching such an engaging device 40 to the peripheral edge of the opening portion of the packaging bag, a portion forming the shape retaining portion 4 1 3 is attached to the opening edge side, and the male body 4 1 2 is in this shape retaining portion. 4 1 3 is more inside. When the packaging bag is unsealed, the shape retaining portion 4 1 3 is used to maintain the opening shape, and the contents are taken out. When closed, the flexible male member 41 and the female member are deformed and sealed. According to this third embodiment, in addition to the effects described in the aforementioned first embodiment, it has the following effects. That is, since the shape retaining portion 4 1 3 is formed at a position deviating from the male portion body 4 1 2, when the male member 41 and the female member are fitted, the shape retaining portion 4 1 3 can be prevented from engaging. Difficult to form an occlusal tool 40 that is easy to engage and has shape retention. [Fourth Embodiment] Next, a fourth embodiment of the present invention will be described. In each of the foregoing embodiments, the shape retaining portions 2 1 3, 3 1 3, 3 2 3, and 413 are integrally formed in the male members 21, 3 1, 4 1, and the female member 2 2 constituting the articulator 20, 30, and 40. , Part of 3 2. On the other hand, as shown in FIG. 7, the difference between the bite 50 of the fourth embodiment is that the male member 5 1 and the female member 5 2 are each made of a single material -15- (13) (13) 200406345. 'Wherein' the male member 51 is made of amorphous PET, and the mother member 52 is made of a flexible soft thermoplastic resin that can be deformed in a deformed state of the male member 51. The male member 51 is a member provided with a strip-shaped base portion 5 丨 丨 and a male portion body 5 丨 2, which is mainly made of amorphous PET and extruded by a uniaxial extrusion molding machine. The mother member 52 is provided with a belt-shaped base 521 and a mother body 5 22, and is mainly composed of a polyolefin resin such as PP and PE. A flexible soft thermoplastic resin such as a reformer is provided as a raw material. Out of shaped components. When the male member 5 1 and the mother member 5 2 are mounted on the film 10 constituting the packaging bag, the mother member 5 2 is simply installed by a conventional heat seal, but the male member 5 is made of amorphous PET. The melting temperature of 1 is higher than that of the thermoplastic resin constituting the film 10, and once it is heat-sealed at the melting temperature of the male member 51, there is a possibility that the film 10 will scorch. Therefore, the film 1 is bonded by an adhesive or the like. It is fixed to the film i 0. According to the fourth embodiment, in addition to the effects described in the first embodiment, it has the following effects. That is, since the male member 51 is made of amorphous PET, and the mother member 52 is made of a soft resin containing PP as a main component, it can be separately manufactured by a general molding method of a bite, and the bite can be efficiently manufactured. With 50. Since the male member 5 1 is made of amorphous PET and the female member 5 2 is made of soft resin, the female body 5 2 of the female member 5 2 can be closely adhered to the male body 5 1 of the male member 5 1. 1 2 so it does not impair the sealing of the bite with 50. -16- (14) 200406345 [Deformation of Embodiment] The present invention is not limited to the foregoing embodiments, and includes deformation. In the aforementioned first to third embodiments, the shape retaining members 223, 3, 13, 23, and 413 are formed on the male members 21, 31, and the female members 22, 32, 42, respectively. However, the present invention is not limited to this. Also, the shape retaining portion is formed only on the male and female members constituting the articulator to achieve the purpose of the invention. In addition, although the foregoing embodiments use amorphous PET as the material of the shape-retaining portion, the material of the shape-retaining portion may be a composition containing PET as the main component. Crystalline PET. Furthermore, in the present invention, it is also possible to use crystalline PET within the range that can be extruded, and various thermoplastic resins that can retain the shape and retention of thermoplastic benzene rings in the main chain can be used. Specifically, for example, polybutylene terephthalate, polyester carbonate, polyxylene oxide, polystyrene sulfide, etc. may be used. ≪ In the first embodiment, the bite 20 may be produced as it is. The front end portion of the male body 2 1 2 has a circular bulge, and 2 22 has a structure of a pair of engaging pieces covering the same. However, it is limited to this. In short, the present invention can be applied to a variety of shapes that can ensure the engaging shape. Building blocks. In addition, the specific structure and shape at the time of the implementation of the present invention are shown in the following sections 2 1 3, '4 1 and, in other words, even if it is a square, the crystalline PET can be adjusted for the configuration. 2. The main body of the polycarbon cross-sectional shape of the present invention can also be made into other structures within the range that can achieve the purpose of the invention as long as it can achieve the purpose of -17- (15) (15) 200406345. [Examples] Example 1; 1 For the male member 21 and the female member 22 of the articulator 20 according to the embodiment, amorphous PET (Eastman Chemical Co., Ltd. PETG6763) is used as the configuration shape retaining portion 2 1 3, 22 3 resin, and co-extrusion molding with random polypropylene (RPP: Idemitsu Petrochemical Co., Ltd. F-744NP) as the resin constituting the male member 21 and the mother member 2 2 surrounding this part Form the male member 21 and the mother member 22. The extrusion conditions of the amorphous PET and RPP in each extrusion molding machine are as shown in Table 1. Table 1 Temperature inside the cylinder rc) Connected to the mold screw diameter hopper side — > Mold side device temperature temperature revolutions (mm ) C 1 C2 C3 C4 degrees rc) rc) (rpm) amorphous PET 0 30 195 205 215 235 240 240 20 RPP 0 4 0 1 80 190 190 200 2 10 240 20 〖3,223 The resin was changed to crystalline PET, and the extrusion molding temperature of each zone was increased by about 20. (: In addition, the male member 21 and the mother member-18 were extruded and molded under the same conditions as in Example 1 (16) 200406345 Example 3; the second material was extruded and molded using the same materials and extrusion conditions as in Example 1. Embodiments of the male member 31 and the female member 32 of the bite 30. Examples 4 to 6;

With respect to the male member 21 and the female member 22 of the second embodiment, the area ratios of the shape retaining portions 213 and 223 to the cross-sectional areas of the male member 21 and the female member 22 were changed to extrude a plurality of types of male members 21 and 22. The materials, forming conditions, and the like are the same as those of the first embodiment. Table 2 shows the area ratios with respect to the male and female members 21, 22 in Examples 4 to 6. Table 2 Mass per meter (g / m) Area ratio (%) of the shape retaining portion Example 4 5 80 Example 5 10 50 Example 6 20 50

Comparative Example 1; Except that the resin constituting the shape-retaining portion 2 1 3 in Example 1 was changed to polyamine (Ny6: Ube Industrial Co., Ltd. UBE Nylon 1 022), under the same conditions as in Example 1 Next, the male member 21 and the female member 22 are extruded. Table 3 shows the extrusion conditions of Nylon. • 19- (17) 200406345 Table 3 Cylinder diameter (mm) In-cylinder temperature (° c) Connector temperature (° c) Mold temperature (° C) Screw revolution (rpm)-bucket side-nuclear equipment; then C 1 C2 C3 C4 N y 6 0 3 0 220 230 240 240 240 240 20 20 RPP 0 4 0 1 80 190 190 200 2 1 〇 240 20

Comparative Example 2; Only the RP P used in Example 1 was used to extrude the male and female members. Table 4 shows the extrusion molding conditions at this time. Table 4 Cylinder diameter (mm) Cylinder inner temperature m (° c) Connector temperature (° c) Mold temperature (° C) Screw rotation speed (rpm) • Bucket side->Mold; then Cl C2 C3 C4 RPP 0 4 0 160 1 75 180 180 180 180 30

Bag making method: The male and female members obtained in Examples 1 to 6 and Comparative Examples 1 and 2 are welded to a non-stretched PP film with heat-sealed rods, and then formed with reference to FIG. At the same time, the sealing portion 11 and the crossing portion are flattened by the sealing rod to manufacture a flat packaging bag 11 sealed at both sides. The temperature at which the cross section was compressed by 20 A by the sealing rod was set to 150. (: The injection frequency is 30 injections / min. -20- (18) (18) 200406345 Evaluation method; (η shape-preserving unpacked packaging bag, at the opening of the packaging bag) About the center part, the occlusal crease appears, lay flat in an open state, and observe the state after 1 minute 'to evaluate the shape retention. The evaluation will not open the packaging bag, and it is easy to determine the state of the content with one hand. Is 0, and the case where it is judged that the contents cannot be taken out without using both hands is set to X. (2) Resealability Put the powdery and block solid into the packaging bag, and make the male component and the female component engage again. To evaluate the resealability. When the resealed packaging bag is turned upside down, the situation where the contents will not spill is set to 0, and the spillage situation is set to X. (3) The flatness is based on the packaging bag on the side The appearance of the cross section after sealing and the leakage of this part of the seal are evaluated for the flattening of the bite. The evaluation considers the appearance of the cross section to be good without leakage, and the appearance is not good although it is not good. The leakage situation is determined as △, which will make the appearance poor and Seal leakage of the case as X. Table 5 shows the results of the above -21--. (19) 200 406 345 (19)

Table 5 Resin type of the shape retaining part Resin type of the male and female members Forming method of the shape retaining part Squeezing shape retention resealability Example 1 Amorphous PET RPP Co-extrusion 0.00 Example 2 Amorphous PET RPP co-extrusion Δ 〇 Example 3 Amorphous PET RPP co-extruded 0000 Example 4 Amorphous PET RPP co-extruded 0000 Example 5 Amorphous PET RPP co-extruded 0.000 Example 6 Amorphous PET RPP Coextrusion Δ〇〇 Comparative Example 1 Polyamide RPP Coextrusion ◎ X 〇 Comparative Example 2-RPP-◎ X 〇

Evaluation results; Since Examples 1 to 6—the body-shaped shape-retaining portions were formed on the male member and the female member, it was confirmed that it was easy to maintain the state of the open opening, and the contents were taken out when unpacking. In addition, in Example 6, although there were some bad appearances, the leakage of the seal did not occur, and it was judged that it had sufficient flattenability. On the other hand, since Comparative Example 1 uses polyamidamine to form the shape-retaining portion, it was confirmed that it was impossible to maintain sufficient shape-retaining property ', which is not suitable for taking out the contents -22- (20) (20) 200406345. Since Comparative Example 2 had no shape-retaining portion, it was confirmed that there was no shape-retaining property and the opening shape could not be maintained. [Industrial Applicability] The present invention can be used as a bite having a pair of male and female members that engage with each other, and a packaging bag with the bite provided with the bite, and can be used as a packaging bag for foods and the like. [Brief Description of the Drawings] Fig. 1 is a front view showing the outline of a packaging bag according to a first embodiment of the present invention. Fig. 2 is a sectional view showing the structure of the articulator according to the embodiment. Fig. 3 is a perspective view illustrating a method of using the packaging bag according to the embodiment. Fig. 4 is a perspective view illustrating a method of using the packaging bag according to the embodiment. Fig. 5 is a sectional view showing the structure of an articulator according to a second embodiment of the present invention. Fig. 6 is a sectional view showing the structure of an articulator according to a third embodiment of the present invention. Fig. 7 is a sectional view showing the structure of an articulator according to a fourth embodiment of the present invention. -23- (21) (21) 200406345 [Description of symbols] 1 Packing bag 10 Film 1 1 Side seal 12 Opening 20, 30, 40, 50 Bite 2 0 A Cross section 2 1, 3 1, 4 1, 5 1 Male member 22, 32, 42, 52 Female member 211, 221, 311, 321, 411, 511, 521 Band base 212, 312, 412, 512 Male body 222, 322, 522 Female body 2 1 3, 2 2 3, 3 1 3, 3 2 3, 4 1 3 Shape retention unit -24-

Claims (1)

(1) (1) 200,406,345, patent application scope 1 · A bite, which is a bite that has a pair of male and female members engaged with each other, is installed along the periphery of the opening of the packaging bag, and is characterized by: At least one of them is provided with a layer that extends along the extension direction of the articulator, and is co-extruded with a thermoplastic resin having a benzene ring in the main chain or a thermoplastic resin having a benzene ring in the main chain. Or as a layer of a multi-layer structure, the shape holding portion that can retain the shape after opening after being mounted on the packaging bag. 2. The articulator according to item 1 of the scope of patent application, wherein the aforementioned shape retaining portion is integrally formed inside the aforementioned male member and / or female member. 3. The articulator according to item 2 of the scope of patent application, wherein the aforementioned shape retaining portion is integrally formed inside the aforementioned male member. 4. The articulator according to item 1 of the scope of the patent application, wherein the male member and the mother member are provided with a fusion base portion welded to the inner surface of the film constituting the packaging bag, and an occlusal portion main portion which is erected from the fusion base portion to each other; The shape holding portion is integrally formed on a welded base portion of the male member and / or the mother member. 5. The articulator according to item 4 of the scope of the patent application, wherein the shape retaining portion is formed at a position where the welding base portion deviates from a position where the occlusal portion body is disposed. 6. The articulator described in item 1 of the scope of the patent application, wherein any one of the aforementioned male member and the aforementioned parent member is made of heat-resistant -25- (2) 200406345 plastic resin constituting the shape retaining portion; A flexible thermoplastic resin that deforms with occlusion. 7. A packing bag with a bite, which is characterized by having the bite described in any one of the scope of patent application 1 to the scope of patent application 6. -26-