JP2006055280A - Fitting fastener and bag with fastener - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fitting fastener which can be adhered as it is without special easily adhering treatment to a paper side even when the opposing side to be adhered is paper or the like by improving the degree of freedom of material selection of a matter to be selected, and to provide a bag with fastener to which the fitting fastener is adhered. <P>SOLUTION: In the fitting fastener 4 consisting of a female fastener piece 5 obtained by forming a female protrusion 5b consisting of thermoplastic resin at a base part 5a formed like a tape and a male fastener piece 6 obtained by forming a male protrusion 6b consisting of thermoplastic resin at a base part 6a formed like a tape, the base part 5a of the female fastener piece 5 and the base part 6a of the male fastener piece 6 have a void structure provided with a void communicated with the surface inside of it. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention provides a fitting fastener that can increase the degree of freedom in selecting a material for an object to be bonded, and can be bonded as it is without subjecting the other party to special easy-adhesion processing even when the other party is paper or the like. The present invention relates to a zippered bag formed by bonding such a fitting fastener to an opening.

  For example, in applications such as bedding, clothing, food, etc., an openable / closable storage bag having a fitting type fastener (chuck) at a content outlet is known. In general, most of this type of storage bag is made of a transparent film made of a synthetic resin such as polyethylene or polypropylene. FIG. 8 shows an example of such a storage bag. FIG. 8B is a cross-sectional view taken along the line BB in FIG. The illustrated storage bag 100 is formed, for example, by overlapping two transparent films 101a and 101b and heat-sealing three sides to form a bag shape. One side excluding the heat seal portions 102a, 102b, and 102c is an opening 103, and a fitting fastener 104 is integrally provided along the heat seal portion 102b. In such a storage bag 100, after the contents are put through the opening 103, the opening 103 is heat-sealed and placed in a general distribution channel, and the consumer places the heat-sealing portion 102b and the fitting fastener 104 together. After the opening is cut and a part of the contents is taken out from the opening, the opening is closed by the fitting fastener 104.

  The fitting fastener 104 includes a pair of female fastener pieces 105 and a male fastener piece 106. The female fastener piece 105 is formed by forming a female projection 105b along the longitudinal direction of the tape-like base portion 105a. The male fastener piece 106 is formed with a male protrusion 106b along the longitudinal direction of the tape-like base portion 106a. These two types of fastener pieces 105 and 106 are made of the same material as the transparent films 101a and 101b, such as polyethylene and polypropylene, and are continuously formed by, for example, extrusion molding. Thereby, the fitting fastener 104 is integrally provided with the storage bag 100 by heat-sealing the base portions 105a and 106a of the fastener pieces 105 and 106 to the transparent fills 101a and 101b.

  In such a storage bag 100, the opening can be closed by fitting the female protrusion 105b and the male protrusion 106b provided opposite to each other along the longitudinal direction. The bag can be easily sealed. On the other hand, if the fitting between the female projection 105b and the male projection 106b is released and the two are separated, the opening can be easily opened. This type of zippered storage bag having an opening that can be freely opened and closed has been studied for its various uses because of its convenience. For example, Patent Document 1 describes an example in which a similar fitting fastener is applied to a paper bag that stores sugar, salt, or the like. As disclosed in Patent Document 1, if the material of the storage bag can be freely selected by making the storage bag with fasteners made of paper, the scope of application of the storage bag with fasteners is further expanded and the convenience is further improved. It is expected.

JP-A-8-133303

  By the way, the fitting fastener 104 uses the elastic deformation of the female protrusion 105b and the male protrusion 106b to fit or separate the female protrusion 105b and the male protrusion 106b, thereby storing the storage bag. 100 opening and closing are realized. For this reason, the material for forming the fitting fastener 104 is naturally limited such that the fitting fastener 104 needs to be formed of a flexible synthetic resin so that the female protrusion 105b and the male protrusion 106b can be elastically deformed. Will be. As a flexible synthetic resin that can be elastically deformed, a general-purpose resin such as polyethylene or polypropylene is advantageous from the standpoint of ease of manufacture and cost. Therefore, most of the fitting fasteners 104 are polyethylene or polypropylene. Etc.

However, polyethylene and polypropylene are known to be difficult to bond with an adhesive. For this reason, in the above-described conventional example, the transparent films 101a and 101b forming the storage bag 100 and the fitting fastener 104 are formed using the same material, and the transparent films 101a and 101b and the fitting fastener 104 are heated. It is integrated by a seal.
In addition, the paper bag disclosed in Patent Document 1 is formed by adhering a pad that closes the opening across the opening of the cylindrical paper bag main body, and closes the opening of the paper bag main body on the inner surface side of the paper so as to be freely opened and closed. A synthetic resin fastener and a cut tape for tearing the paper on the tip side of the fastener. In such a paper bag, the male and female chuck tapes must be adhered to the paper bag in a state of being adhered to one sheet of paper (see FIG. 5 of Patent Document 1). There is a problem that there is no degree of freedom in application to size and the like. Moreover, when using the contents, a cut tape for tearing the backing paper is required. For this reason, the backing paper is limited to paper that can be torn with a cut tape. Accordingly, there is a problem in that the adhesive paper cannot be selected for the purpose of bonding force only in bonding the chuck tape and the paper bag.

  The present invention has been proposed in order to solve the problems of the conventional techniques as described above, increasing the degree of freedom of material selection for the adherend, even if the partner to be bonded is paper, An object of the present invention is to provide a fitting fastener that can be bonded as it is without subjecting the other party to a special easy adhesion treatment, and a bag with a fastener that is formed by bonding such a fitting fastener to an opening.

  The fitting fastener according to the present invention, which has been made to solve the above-described problems, includes a female fastener piece formed by forming a female protrusion portion made of a thermoplastic resin on a tape-shaped base portion, and a tape-shaped base portion. A male fastener piece formed by forming a male protrusion made of a plastic resin, and a fitting fastener in which the female protrusion and the male protrusion are fitted to each other along the longitudinal direction, The base portion of the female fastener piece and the base portion of the male fastener piece are internally provided with a gap communicating with the surface at least on the surface opposite to the surface on which the female protrusion portion or the male protrusion portion is formed. The void structure is used.

  Thereby, when bonding the fitting fastener according to the present invention and a bag material such as paper or nonwoven fabric, the material forming the base of the fitting fastener and the bag material are chemically different materials, Even if it is a combination that is difficult to bond in general, mechanical bonding due to the anchor effect can be expected because the adhesive that bonds the two enters the gap that communicates with the base, so fitting fasteners can be attached to bags made of various materials. Can be easily bonded. Further, if the gap of the base portion is configured to communicate with the surface even on the surface where the female projection portion or the male projection portion is formed, the resin of the female projection portion or the male projection portion is formed in the gap communicating with the base portion. The female protrusions and the male protrusions can be firmly bonded to the base by mechanical coupling due to the anchor effect of the resin that has entered the gap in the base. Therefore, the material forming the base can be selected in a wide range without being limited by the adhesiveness between the material and the resin forming the female protrusion or the male protrusion. Therefore, the material for forming the base can be appropriately selected in consideration of the adhesiveness with the adherend.

  In the fitting fastener according to the present invention, in consideration of adhesiveness with paper or the like, the void structure is a fibrous structure in which a large number of fibers are closely packed while forming voids between the fibers. Is preferred. Further, the female protrusion and / or the male protrusion includes a substrate on the base side, and integrally forms the substrate and a female or male fitting protrusion supported by the substrate. It is preferable that As a result, the contact area between the female protrusion and the base and / or the male protrusion and the base can be increased, and the increase in the contact area results in the female protrusion and the base and / or the male protrusion and the base. Bond strength can be increased.

  In addition, a thermoplastic resin layer is formed on the lamination interface between the base and the female projection in the female fastener piece and / or the lamination interface between the base and the male projection in the male fastener piece. It is preferable to do this. Thereby, the bond strength at the laminated interface can be further improved.

  On the other hand, the zippered bag according to the present invention includes a female fastener piece formed by forming a female protrusion made of a thermoplastic resin on a tape-like base, and a male protrusion made of a thermoplastic resin on a tape-like base. The base of the female fastener piece and the base of the male fastener piece are opposite to at least the female protrusion or the surface on which the male protrusion is formed. When a fitting fastener having a gap structure having a gap communicating with the surface on the side surface is used as a bag so that the female protrusion and the male protrusion are opposed to each other and fitted to each other It is set as the structure adhere | attached on the inner surface of the opening part side.

  Thereby, the bag with a fastener formed with various raw materials can be provided, the application range of the bag with a fastener can be expanded, and the convenience of the bag with a fastener can be further improved.

  According to the present invention, there is a high degree of freedom in selecting a material for an object to be bonded, and even if the other party to be bonded is paper or the like, it can be attached without being subjected to a special easy adhesion process. A combined fastener can be provided, and a zippered bag made of various materials, to which a fitting fastener is bonded with sufficient strength, can be easily obtained. Furthermore, since the fitting fastener according to the present invention is not interlocked with the cut property of the opening at the time of opening, there is no restriction such as the material being limited in order to ensure the cut property, and it has excellent versatility. is there. Thereby, the application range of a bag with a fastener can be expanded, and the convenience of a bag with a fastener can be further improved.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[First embodiment]
FIG. 1 is a perspective view showing an outline of a first embodiment of a fitting fastener according to the present invention. 2 is a cross-sectional view taken along the line AA in FIG. The fitting fastener 4 in this embodiment is composed of a pair of female fastener pieces 5 and a male fastener piece 6 as shown in the figure.

  The female fastener piece 5 includes a base portion 5a formed in a tape shape. On one surface of the base portion 5a of the female fastener piece 5, a female protrusion portion 5b having a female fitting protrusion 5c is formed. On the other hand, the male fastener piece 6 is similarly provided with a base portion 6a formed in a tape shape, and a male protrusion portion 6b having a male fitting protrusion 6c is formed on one surface of the base portion 6a. The female fitting protrusion 5c in the female fastener piece 5 and the male fitting protrusion 6c in the male fastener piece 6 have a fitting shape that fits in pairs.

  Thus, the female fastener piece 5 and the male fastener piece 6 have the same configuration except for the shapes of the fitting protrusions 5c and 6c in the protrusions 5b and 6b. Hereinafter, the member that forms the female fastener piece 5 and the member that forms the male fastener piece 6 will be described.

  The protrusions 5b and 6b include substrates 5d and 6d that support the fitting protrusions 5c and 6c, respectively, and have a shape in which the substrates 5d and 6d and the bases 5a and 6a are stacked. The protrusions 5b and 6b are formed by integrally forming the fitting protrusions 5c and 6c and the substrates 5d and 6d (in a single connection). It is preferable that the substrates 5d and 6d have substantially the same dimensions as the base portions 5a and 6a, and fitting protrusions 5c and 6c are formed along the longitudinal direction of the substrates 5d and 6d.

  By making the shapes of the protrusions 5b and 6b into shapes having such substrates 5d and 6d, the contact area between the bases 5a and 6a and the protrusions 5b and 6b can be increased. Since the contact area is increased, the bonding strength between the base portions 5a and 6a and the protruding portions 5b and 6b can be increased. However, if the coupling strength between the base portions 5a and 6a and the projection portions 5b and 6b is sufficiently obtained, the projection portions 5b and 6b may be formed only from the fitting projections 5c and 6c as shown in FIG. . The specific shapes of the fitting protrusions 5c and 6c can adopt various shapes that can be fitted to each other, and are not limited to the shapes shown in the drawings. .

  The protrusions 5b and 6b having such a shape can be formed by, for example, extruding a thermoplastic resin. As the thermoplastic resin for forming the protrusions 5b and 6b, a polyolefin resin such as polypropylene or polyethylene, or an ethylene / methacrylic acid copolymer can be used.

  In the present embodiment, the base portions 5a and 6a forming the fastener pieces 5 and 6 are internally provided with a large number of gaps communicating with the surface at least on the surface opposite to the surface on which the protrusions 5b and 6b are formed. However, it is preferable that the gap communicates with the surface even on the surface where the protrusions 5b and 6b are formed. As such a void structure, for example, a fibrous structure in which a large number of fibers are densely formed while forming voids between the fibers, or an open cell foam in which bubbles communicate with the surface is used.

  Examples of the fibrous structure include non-woven fabric, paper, hook-and-loop fastener, felt, woven fabric, knitted fabric, and the like. The non-woven fabric may be a short-fiber non-woven fabric or a long-fiber non-woven fabric, and the production method is not particularly limited, but a long-fiber non-woven fabric by a spunbond method is preferable from the viewpoints of strength, hygiene, and disposal. In addition, as a raw material of the nonwoven fabric, polyolefin resins such as polypropylene and polyethylene, polyamide resins such as nylon, polyester resins such as polyethylene terephthalate, and the like can be used. Examples of paper include pulp paper, kraft paper, cardboard, corrugated base paper, Japanese paper, coated paper such as coated paper, etc. However, the paper is not limited to these as long as it has a void structure. .

  As an open-cell foam, for example, a foam in which open-cells communicating with the surface are formed inside by kneading a foaming agent into a polyolefin resin such as polypropylene or polyethylene and extrusion foaming is used. Can do. In the present embodiment, such an open-cell foam can be used as the void structure, but considering the adhesiveness with paper or the like, it is preferable to use the fibrous structure as described above. In particular, nonwoven fabric and paper are preferable.

  In order to form the protrusions 5b and 6b on the bases 5a and 6a, the protrusions 5b and 6b that have been formed in a desired shape may be bonded to the bases 5a and 6a with an adhesive. Also, the contact portions of the protrusions 5b and 6b with the bases 5a and 6a (see FIG. 3; however, in the example shown in FIG. 1, the surfaces facing the bases 5a and 6a of the substrates 5d and 6d) are heated and melted. For example, the protrusions 5b and 6b and the bases 5a and 6a may be integrated by heating and pressurizing.

  However, in consideration of manufacturing efficiency, for example, it is preferable that the resin for forming the protrusions 5b and 6b is melt-extruded and formed on the bases 5a and 6a while feeding out the material for forming the bases 5a and 6a. In this case, the material for forming the bases 5a and 6a may be cut into a tape shape in advance, but a plurality of protrusions 5b and 6b are melt-extruded on the sheet-shaped material while being stacked to form the material. Then, it may be slit to a necessary tape width during or after the lamination.

  Thus, if projection part 5b, 6b and base part 5a, 6a are integrated, projection part 5b, 6b and base part 5a, 6a can be firmly combined. That is, as shown in FIG. 4 (a), the base portions 5a and 6a have a void structure including a large number of voids 8 communicating with the surface, and thus the base portions 5a and 6a of the protrusions 5b and 6b. When the portion in contact with the base contacts the bases 5a and 6a in a molten state, the resin enters the space 8 communicating with the surfaces of the bases 5a and 6a. Thereby, the protrusions 5b and 6b and the bases 5a and 6a are firmly coupled to each other by the mechanical coupling due to the anchor effect of the resin 9 that has entered the gaps 8 of the bases 5a and 6a.

  Here, FIG. 4A is a schematic enlarged cross-sectional view of the laminated interface between the base portions 5a and 6a and the protruding portions 5b and 6b. This figure conceptually shows a state in which the resin 9 has entered the gap 8 communicating with the surfaces of the bases 5a and 6a, and the gap 8 is simply depicted. Further, in the illustrated example, all the voids 8 are filled with the resin 9, but it is only necessary that the resin 9 enters the voids 8 to such an extent that the anchor effect can be exhibited.

  Thus, since the projections 5b and 6b and the bases 5a and 6a are firmly bonded by mechanical coupling, the material forming the bases 5a and 6a is the same as the material forming the projections 5b and 6b. It becomes possible to select in a wide range without considering the adhesiveness. Therefore, the fitting fastener 4 can be easily bonded to a bag made of various materials by appropriately selecting a material for forming the base portions 5a and 6a in consideration of adhesiveness to the adherend.

  If the fitting fastener 4 thus obtained is bonded to the opening 3 of the paper bag 1 as shown in FIG. 5, a paper-made zippered bag can be easily obtained. Specifically, the surface opposite to the surface on which the protrusions 5b and 6b of the base portions 5a and 6a are formed is an adhesive surface, and the adhesive surface and the paper bag are combined with a dry laminate, a hot melt adhesive, a glue, and both surfaces. What is necessary is just to adhere | attach along the inner side of the opening part 3 with a tape.

At this time, as shown in FIG. 4 (b), since the internal gap 8 communicates with the surfaces of the base portions 5a and 6a even on the bonding surface, the adhesive 10 enters the gap and exhibits an anchor effect, Adhesion with the paper bag 1 also becomes stronger. Furthermore, as described above, the materials for forming the base portions 5a and 6a can be selected widely, and can be appropriately selected in consideration of the adhesiveness to the adherend. For this reason, for example, if paper is used for the base portions 5a and 6a, the attachment of the fitting fastener 4 to the paper bag 1 becomes adhesion between the papers, and the fitting fastener can be easily formed by using an adhesive such as a starch paste commercially available. 4 can be adhered to the paper bag 1.
Here, FIG. 4B is a schematic enlarged cross-sectional view of the bonding interface between the base portions 5a and 6a and the paper bag 1. FIG. This figure conceptually shows a state in which the adhesive 10 has entered the gap 8 communicating with the surfaces of the bases 5a, 6a, and the gap 8 is simply depicted as in FIG. 4 (a). . Further, in the illustrated example, all the gaps 8 are filled with the adhesive 10, but it is sufficient that the adhesive 10 enters the gap 8 to such an extent that the anchor effect can be exhibited.

  In obtaining such a paper bag 1 with a fastener, the fitting fastener 4 is bonded to the base paper before forming the bag-like form, and the base paper to which the fitting fastener 4 is adhered is used as the bag-like form. May be formed. Further, for example, it can be bonded to a paper bag that has been formed into a bag shape in advance, such as bonding directly to a commercially available paper bag. Particularly in the latter case, the fitting fastener 4 is preferably provided in a form in which an adhesive layer is provided on the adhesive surface and a release paper is laminated on the adhesive layer. As a result, simply by peeling off the release paper, the fitting fastener 4 can be directly bonded to a commercially available paper bag or the like, and the paper bag 1 with the fastener can be easily obtained.

  The paper bag 1 in which the fitting fastener 4 is bonded to the opening 3 can close the opening 3 by fitting the opposing female projection 5b and male projection 6b to each other along the longitudinal direction. it can. Thereby, the inside of a bag can be sealed easily. Moreover, if the fitting between the female projection 5b and the male projection 6b is released and the two are separated, the opening 3 can be easily opened. A gusset is formed on the side surface of the illustrated paper bag 1 by folding the side surface inward. For this reason, escape portions 3a and 3b for avoiding interference between the fitting fastener 4 and the gusset are formed in the opening 3 excluding the side surface. In the illustrated paper bag 1, the fitting fastener 4 is bonded to the escape portions 3a and 3b.

[Second Embodiment]
Next, a second embodiment of the fitting fastener according to the present invention will be described. FIG. 6 is a schematic cross-sectional view showing a second embodiment of the fitting fastener according to the present invention.

  This embodiment has been described above in that the thermoplastic resin layer 7 that enhances the adhesion between the bases 5a, 6a and the protrusions 5b, 6b is formed at the laminated interface between the bases 5a, 6a and the protrusions 5b, 6b. It is different from the first embodiment.

  Examples of the resin forming the thermoplastic resin layer 7 include low-density polyethylene, ethylene / methacrylic acid copolymer, or an ionomer made of a base resin such as ethylene / methacrylic acid copolymer or ethylene / acrylic acid copolymer. Is mentioned. The resin that forms the thermoplastic resin layer 7 is determined in consideration of the thermal adhesiveness with the resin that forms the protrusions 5b and 6b, but usually the protrusions 5b and 6b are formed. A material similar to the resin may be used.

  In order to laminate the thermoplastic resin layer 7 on the bases 5a and 6a, a thermoplastic resin film previously formed into a film shape may be bonded by an adhesive or heat seal, but it is preferable to use extrusion lamination. . According to the extrusion lamination, the thermoplastic resin layer 7 can be laminated and formed with high productivity, and the anchor effect as described above is exhibited, thereby further strengthening the adhesion between the base portions 5a and 6a and the thermoplastic resin layer 7. It is also possible. When coated paper is used as a material for forming the bases 5a and 6a, the coated layer of the coated paper corresponds to the thermoplastic resin layer 7, and the resin protrusions 5b and 6b and the bases 5a and 6a Since any of the corresponding paper portions has good adhesiveness, the resin-made protruding portions 5b and 6b and the base portions 5a and 6a can be easily bonded without newly laminating the thermoplastic resin layer 7.

  Also in this embodiment, the protrusions 5b and 6b can be formed on the bases 5a and 6a by the same means as in the first embodiment described above. That is, the protrusions 5b and 6b, which have been molded in a desired shape in advance, are integrated with the bases 5a and 6a by heat sealing, or a resin that forms the protrusions 5b and 6b on the bases 5a and 6a. What is necessary is just to carry out melt | extrusion extrusion and laminate-forming.

  At this time, the protrusions 5b and 6b are firmly bonded to the thermoplastic resin layer 7 by heat fusion. In addition, depending on the degree of heating and pressurizing the protrusions 5b and 6b, the molten resin can further enter the gaps in the base portions 5a and 6a, and a stronger bond can be realized. Specifically, in the stage before forming the protrusions 5b and 6b, even if the bases 5a and 6a are not sufficiently bonded to the thermoplastic resin layer 7, the protrusions 5b and 6b are formed on the bases 5a and 6a. When forming, if the resin forming the thermoplastic resin layer 7 is melted by the heat and enters the gaps of the base portions 5a and 6a, the base portions 5a and 6a, the thermoplastic resin layer 7 and the projecting portions 5b and 6b are three. The bond between persons can be made stronger.

  The present embodiment is different from the first embodiment described above in the above points, and since the other configuration is substantially the same, detailed description thereof is omitted.

  According to this embodiment described above, in addition to the effects obtained by the first embodiment described above, the base portion is formed by forming the thermoplastic resin layer 7 at the laminated interface between the base portions 5a, 6a and the protruding portions 5b, 6b. The coupling | bonding of 5a, 6a and projection part 5b, 6b can be made stronger.

  Next, the present invention will be described in more detail with reference to specific examples.

[Example 1]
Pulp paper is used as a material for forming the base portion 5a, and while the pulp paper wound up in a roll shape is fed out from the roll, LLDPE (linear low density polyethylene) is melt-extruded on the roll paper, and the female shape is formed by extrusion lamination. The protrusion 5b was formed. Next, the obtained laminate was cut into a width of 13 mm to produce a female fastener piece 5. Similarly, a male fastener piece 6 was manufactured, and a pair of fitting fasteners 4 was obtained.

[Example 2]
A spunbond nonwoven fabric made of homopolypropylene is used as a material for forming the base 5a, and the nonwoven fabric wound up in a roll shape is fed out from the roll, and then LLDPE polymerized using a metallocene catalyst is extruded onto the nonwoven fabric. Laminated and rolled up into a roll. Thereby, the thermoplastic resin layer 7 made of LLDPE was formed on the base portion 5a. LLDPE was melt-extruded on the thermoplastic resin layer 7 while the laminate thus obtained was fed from a roll, and a female projection 5b having the same shape as in Example 1 was formed by extrusion lamination. Next, the obtained laminate was cut into a width of 13 mm to produce a female fastener piece 5. Similarly, a male fastener piece 6 was manufactured, and a pair of fitting fasteners 4 was obtained.

[Example 3]
A pulp paper was used as a material for forming the base portion 5a, and a coated paper having a thermoplastic resin layer 7 made of polyethylene formed on the surface thereof was prepared. LLDPE was melt-extruded onto the thermoplastic resin layer 7 while the coated paper wound up in a roll shape was fed out of the roll, and a female projection 5b was formed by extrusion lamination. The female projection 5b is configured only by the fitting projection 5c. Next, the obtained laminate was cut into a width of 13 mm to produce a female fastener piece 5. Similarly, a male fastener piece 6 was manufactured, and a pair of fitting fasteners 4 was obtained.

[Comparative Example 1]
LLDPE was melt extruded and formed into the same shape as the female projection 5b of Example 1. Next, the obtained extruded product was cut into a width of 13 mm to produce a female fastener piece. Similarly, a male fastener piece was manufactured to obtain a pair of fitting fasteners.

  The fitting fasteners obtained in Examples 1 to 3 and Comparative Example 1 were glued to the inner surface side of the opening of the paper bag using a starch paste. After the application, the fitting fastener was peeled off from the paper bag after sufficiently drying. The adhesive strength was evaluated based on the degree of peeling of the fitting fastener at this time. The evaluation results are as follows.

［評価基準］
○：嵌合ファスナーを剥がそうとすると、紙袋が材料破壊を起こして破けてしまった。
×：嵌合ファスナーが紙袋からスムーズに剥離するか、袋の表面がわずかに剥がれる程度である。

[Evaluation criteria]
○: When trying to remove the mating fastener, the paper bag was broken due to material destruction.
X: The fitting fastener is peeled off smoothly from the paper bag or the bag surface is peeled off slightly.

  The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, a paper bag is illustrated as an example of a zippered bag, but the present invention can also be applied to a cloth bag, a non-woven bag, and the like. Furthermore, as a material of a bag with a zipper, it can be applied not only to materials that can be thermally bonded but also to materials that are difficult to thermally bond. In addition, a zippered bag is generally provided with an opening at the end of the bag. For example, as shown in FIG. 7A, two materials 1a and 1b are bonded together with an adhesive 11 to form a bag. The opening 3 may be provided on the side surface on the material 1b side as shown in FIG. 7B by pulling the cut tape 12 in the direction of the arrow in the drawing and tearing one material 1b side. Well (side opening), in this case, the fitting fastener 4 may be attached along the portion opening to the side as shown.

  As described above, the present invention can be widely used to obtain an openable / closable bag with a fastener that has a fitting-type fastener at the opening.

It is a perspective view which shows the outline of 1st embodiment of the fitting fastener which concerns on this invention. It is AA sectional drawing of FIG. It is a schematic sectional drawing which shows the modification of 1st embodiment of the fitting fastener which concerns on this invention. FIG. 4 is a schematic enlarged cross-sectional view of a laminated interface (FIG. 4A) between a base portion and a protruding portion and a bonding interface between a base portion and a paper bag (FIG. 4B) in the first embodiment of the fitting fastener according to the present invention. is there. It is a perspective view which shows the outline of an example of the bag with a fastener which concerns on this invention. It is a schematic sectional drawing which shows 2nd embodiment of the fitting fastener which concerns on this invention. It is sectional drawing which shows the outline of the fastener attachment position vicinity in the other example of the bag with a fastener which concerns on this invention. It is the schematic which shows an example of the conventional bag with a fastener.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bag with fastener 3 Opening part 4 Fitting fastener 5 Female fastener piece 5a Base part 5b Female protrusion part 5c Fitting protrusion 5d Substrate 6 Male fastener piece 6a Base part 6b Male protrusion part 6c Fitting protrusion 6d Substrate 8 Cavity

Claims (5)

From a female fastener piece formed by forming a female protrusion made of a thermoplastic resin on a tape-shaped base, and a male fastener piece formed by forming a male protrusion made of a thermoplastic resin on a tape-shaped base A fitting fastener in which the female projection and the male projection are fitted to each other along the longitudinal direction,
The base portion of the female fastener piece and the base portion of the male fastener piece are internally provided with a gap communicating with the surface at least on the surface opposite to the surface on which the female protrusion portion or the male protrusion portion is formed. A fitting fastener, characterized by being a hollow structure.   The fitting fastener according to claim 1, wherein the void structure is a fibrous structure in which a large number of fibers are densely formed while forming voids between the fibers.   The female projection and / or the male projection are provided with a substrate on the base side, and the substrate and a female or male fitting projection supported by the substrate are integrally formed. The fitting fastener according to claim 1 or 2.   The thermoplastic resin layer is formed in the lamination | stacking interface of the said base part in the said female type | mold fastener piece and the said female-like projection part, and / or the lamination | stacking interface of the said base part and the said male-like projection part in the said male type | mold fastener piece. The fitting fastener according to 1, 2 or 3.   From a female fastener piece formed by forming a female protrusion made of a thermoplastic resin on a tape-shaped base, and a male fastener piece formed by forming a male protrusion made of a thermoplastic resin on a tape-shaped base The gap between the base of the female fastener piece and the base of the male fastener piece communicating with the surface at least on the surface opposite to the surface on which the female protrusion or the male protrusion is formed. The fitting fastener having a gap structure prepared in the above is adhered to the inner surface on the opening side when used as a bag so that the female protruding portion and the male protruding portion are opposed to each other. Features a zippered bag.

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