CN115666315A

CN115666315A - Fastener tape, container with fastener tape, and method for manufacturing container with fastener tape

Info

Publication number: CN115666315A
Application number: CN202180039094.1A
Authority: CN
Inventors: 片田亮; 户高匠; 太田耀宽
Original assignee: Idemitsu Unitech Co Ltd
Current assignee: Idemitsu Unitech Co Ltd
Priority date: 2020-06-05
Filing date: 2021-06-04
Publication date: 2023-01-31
Also published as: JPWO2021246501A1; TW202216552A; WO2021246501A1; US20230227212A1; KR20230021654A

Abstract

The present invention provides a buckle tape, wherein the buckle tape comprises: a first member including a first base strip and a first engaging portion protruding from the first base strip; and a second member including a second base strip and a second engaging portion protruding from the second base strip and engageable with the first engaging portion, wherein a minimum distance between the first member and the second member when the first base strip and the second base strip are opposed to each other and the first engaging portion and the second engaging portion are engaged with each other is 1.1mm or less.

Description

Fastener tape, container with fastener tape, and method for manufacturing container with fastener tape

Technical Field

The present invention relates to a fastener tape, a container with a fastener tape, and a method for manufacturing a container with a fastener tape.

Background

Conventionally, in the process of joining a zipper tape to a bag body in the production of a bag with a zipper tape, a method of performing heat pressure bonding while guiding the zipper tape using a metal plate called a plate (or spacer) has been employed. Patent document 1 describes a technique for preventing fusion of a zipper tape to a spacer when the zipper tape is heat-sealed to a film. Such plates typically have a thickness of about 1.1mm or more, and in order to reduce the resistance of the plate to passage, the spacing of the zipper strips is designed to exceed 1.1mm.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. H10-297653

Disclosure of Invention

However, in view of preventing the occurrence of pin holes due to the squashing of the end portions of the fastener tape and the handleability when bundling the manufactured bags with the fastener tape, it is preferable to make the fastener tape thin. However, as described above, due to the restrictions on the manufacturing process, the interval between the zipper tapes, that is, the interval between the zipper tapes when the engagement portions are engaged, exceeds 1.1mm, and as a result, there is a limit to thinning.

Accordingly, an object of the present invention is to provide a fastener tape, a container with a fastener tape, and a method for manufacturing a container with a fastener tape, which can make the fastener tape thinner than conventional ones.

Means for solving the problems

[1] A fastener tape, comprising: a first member including a first base strip and a first engaging portion protruding from the first base strip; and a second member including a second base strip and a second engaging portion protruding from the second base strip and engageable with the first engaging portion, wherein a minimum distance between the first member and the second member when the first base strip and the second base strip are opposed to each other and the first engaging portion and the second engaging portion are engaged with each other is 1.1mm or less.

[2] The fastener tape according to [1], wherein the first base strip and the second base strip each comprise: a first portion including a surface from which the first engaging portion or the second engaging portion protrudes; and a second portion including a surface on the opposite side of the first engaging portion or the second engaging portion, the first portion being formed of a first resin composition having a higher melting point than a second portion of a second resin composition.

[3] The zipper tape according to [2], wherein the main component of the first resin composition is polypropylene and the main component of the second resin composition is polyethylene.

[4] The zipper tape according to [2] or [3], wherein the thickness of the first portion is 100 μm or more, the thickness of the second portion is 5 μm or more, and the thickness of each of the first base strip and the second base strip is 105 μm or more.

[5] The fastener tape according to any one of [1] to [4], wherein the first member has a first rib formed on a same surface as the first engaging portion, the second member has a second rib formed on a same surface as the second engaging portion, the first base strip and the second base strip face each other, and a minimum distance between the first rib and the second rib when the first engaging portion and the second engaging portion are engaged with each other is 1.1mm or less.

[6] The fastener tape according to any one of [1] to [5], wherein the first base strip and the second base strip have a thick portion formed on a surface opposite to the first engaging portion or the second engaging portion.

[7] The fastener tape according to [6], wherein the thick portion is formed to have a width smaller than half of the width of the first base strip and the second base strip, except for the widthwise ends of the first base strip and the second base strip.

[8] A container with a zipper tape, comprising: [1] the buckle tape according to any one of [1] to [7 ]; and a container body having a first face to which the first base strip is joined and a second face to which the second base strip is joined.

[9] In the container with a fastener tape according to [8], the first engaging portion is a female engaging portion, the second engaging portion is a male engaging portion, the fastener tape is disposed so as to be in contact with a housing space formed between the first surface and the second surface, and the first base strip is not joined to the first surface on the side of the housing space with respect to the first engaging portion and is joined to the first surface on the side opposite to the housing space with respect to the first engaging portion.

[10] The buckle-equipped container according to [8] or [9], wherein the container body is bag-shaped.

[11] [ claim 1] A method for manufacturing a container with a fastener tape according to any one of [8] to [10], wherein, in the step of inserting the fastener tape into the inside of the container body and joining the first base strip and the second base strip to the first surface and the second surface, respectively, no insert plate is interposed between the first base strip and the second base strip.

According to the above configuration, the buckle tape can be made thinner than conventional ones. This makes it easy to prevent the occurrence of pinholes due to flattening of the end of the fastener tape in the bag with fastener tape, and to reduce the volume height when the bag with fastener tape is bundled, thereby improving the handleability.

Drawings

Fig. 1 is a cross-sectional view of a bag with a fastener tape including the fastener tape according to an embodiment of the present invention.

Fig. 2 is a diagram for explaining a method of measuring the protrusion height of the engagement portion.

Fig. 3 is a sectional view of a conventional bag with a zipper tape.

Fig. 4 is a diagram for explaining a configuration example of the base strip.

Fig. 5 is a diagram for explaining another configuration example of the base strip.

Fig. 6 is a diagram for explaining still another configuration example of the base band.

Fig. 7 is a diagram for explaining still another configuration example of the base band.

Fig. 8 is a diagram for explaining a modification of the embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, the same reference numerals are given to the components having substantially the same functional configuration, and redundant description is omitted.

Fig. 1 is a sectional view of a bag with a fastener tape including a fastener tape according to an embodiment of the present invention. The bag with a fastener tape of the present embodiment includes a first surface 111 and a second surface 112 constituting a bag main body, and a fastener tape 120. The fastener tape 120 includes

female engagement portions

121A and 121B and a male engagement portion 122 that can be engaged with each other, and

base strips

123 and 124. In the following description, a portion including the

female engagement portions

121A and 121B and the base strip 123 is referred to as a female member 120A (first member), and a portion including the male engagement portion 122 and the base strip 124 is referred to as a male member 120B (second member). Also shown in fig. 1 are

sealing bars

510, 520 used in the manufacture of bags with zipper tape. The base strip 123 of the zipper tape 120 is joined to the first surface 111 of the bag body using a seal bar 510, and the base strip 124 is joined to the second surface 112 of the bag body using a seal bar 520.

In the zipper tape 120 as described above, the base strip 123 and the base strip 124 face each other, and the minimum distance d between the female member 120A and the male member 120B when the

female engagement portions

121A and 121B and the male engagement portion 122 are engaged with each other _min Is 1.1mm or less. Here, the minimum spacing d _min The distance between the female member 120A and the male member 120B is measured in a state where at least one of the

female engagement portions

121A, 121B or the male engagement portion 122 is in contact with the opposing base strip. In the illustrated example, the minimum distance d is measured in a state where the male engagement portion 122 is in contact with the base strip 124 _min . It should be noted that at the minimum interval d _min In the measurement of (3), the base strip 123 and the base strip 124 are opposed to each other, that is, the

base strips

123 and 124 extend along a pair of reference planes P1 and P2 parallel to each other. Minimum spacing d _min Defined as the distance in the direction perpendicular with respect to the reference planes P1, P2. The base strip 12 does not take into account the portion other than the engaging portion3. 124 are curved with a minimum spacing d _min A changed situation occurs. When there is a projection such as a rib on the surface of the

base strips

123, 124 on the engaging portion side as in the example described later, the minimum distance d is measured by subtracting the projection height of the projection from the distance between the

base strips

123, 124 _min . Minimum spacing d _min Preferably 1.0mm or less, more preferably 0.95mm or less, further preferably 0.90mm or less, still further preferably 0.8mm or less, particularly preferably 0.7mm or less, further particularly preferably 0.6mm or less. The lower limit is not particularly limited, but is, for example, 0, and preferably 0.01mm or more from the viewpoint of facilitating engagement between the engaging portions.

The first surface 111 and the second surface 112 are formed of, for example, a single-layer or multi-layer thermoplastic resin film. The thermoplastic resin may specifically be Low Density Polyethylene (LDPE), linear Low Density Polyethylene (LLDPE), or polypropylene (PP). The PP may be Homopolypropylene (HPP), atactic polypropylene (RPP) or block polypropylene (BPP). In the case where the bag body is formed of a multilayer film, biaxially stretched polypropylene (OPP), biaxially stretched polyethylene terephthalate (OPET), or biaxially stretched nylon (ONy) may be used as the surface base material. These resins are not limited to resins derived from fossil fuels, and may be bio-plastics considering the environment, or resins derived from fossil fuels may be used in combination with bio-plastics. The film forming the bag body may include a layer of an inorganic material formed by aluminum vapor deposition, lamination of aluminum foil, or the like.

The zipper tape 120 is an elongated member formed by extrusion molding of a polyolefin resin, for example, and is disposed between the first surface 111 and the second surface 112 of the bag body so as to be in contact with the housing space. The zipper tape 120 is made of, for example, polyolefin resin. More specifically, the zipper tape 120 may be formed of Low Density Polyethylene (LDPE), linear Low Density Polyethylene (LLDPE), or polypropylene (PP). The PP may be Homopolypropylene (HPP), atactic polypropylene (RPP) or block polypropylene (BPP). These are not limited to resins derived from fossil fuels, and may be bio-plastics that take into account the environment, or may be used in combination with the resins derived from fossil fuels. Examples of the bioplastic include biopolyethylene and biopolypropylene using a plant-derived raw material. The above-described bioplastic may be used as part of the resin composition forming the zipper tape 120, or may be used as the entire bioplastic. The material of the zipper tape 120 may be added with known additives such as a stabilizer, an antioxidant, a lubricant, an antistatic agent, a colorant, and the like, as needed.

Fig. 2 is a diagram for explaining an example of a method for measuring the minimum distance between the members of the fastener tape. In the illustrated example, the thickness of the base strips 123, 124 is not uniform in the width direction, but in such a case, the base strips 123, 124 may be extended along the pair of reference planes P1, P2, and the minimum distance d may be measured as a distance in a direction perpendicular to the reference planes P1, P2 _min 。

Here, in the case of the conventional bag body with a zipper tape shown in fig. 3, when the base strips 123P, 124P of the zipper tape 120P are joined to the first surface 111 and the second surface 112 of the bag body, respectively, the thickness d is interposed between the base strips 123P, 124P of the zipper tape 120 inserted inside the bag body _p Plates (or spacers) 530A, 530B of at least 1.1mm or more. In this case, in order to reduce resistance during conveyance of the zipper tape 120, the minimum distance d between the base strip 123P and the base strip 124P when the

female engagement portions

121A and 121B and the male engagement portion 122 are engaged with each other and the base strips 123P and 124P are pressed against each other is set to be small ₀ Is designed to exceed at least 1.1mm.

In the present embodiment, as shown in fig. 1, in the step of joining the base strips 123, 124 of the zipper tape 120 to the first surface 111 and the second surface 112 of the bag main body, respectively, since no insert plate is sandwiched between the base strips 123, 124, the minimum distance d between the female member 120A and the male member 120B when the

female engagement portions

121A, 121B and the male engagement portion 122 are engaged with each other can be obtained _min The minimum distance d can be set to 1.1mm or less as described above _min Is 0. However, since no insert plate is interposed, when the first surface 111 and the second surface 112 are joined to the base strips 123 and 124 by heat sealing with the seal bars 510 and 520, there is a possibility that these are joined togetherPossibility of welding between the base strips 123, 124. To cope with this, in the present embodiment, the base strips 123 and 124 include

first portions

123A and 124A and

second portions

123B and 124B, respectively, which are formed of different resin compositions from each other. The

first portions

123A, 124A include faces on which respective engaging portions project from the base strips 123, 124, and the

second portions

123B, 124B include faces on the opposite side of the engaging portions. The melting point of the resin composition (first resin composition) forming the

first portions

123A, 124A is higher than the melting point of the resin composition (second resin composition) forming the

second portions

123B, 124B. Thus, for example, the temperature of the sealing

rods

510 and 520 can be adjusted so that the temperature of the base strips 123 and 124 at the time of sealing becomes lower than the melting point of the first resin composition and higher than the melting point of the second resin composition, thereby preventing welding between the base strips 123 and 124.

In the above example, in order to easily adjust the temperature of the seal bars 510 and 520, for example, the melting point of the first resin composition is preferably higher than the melting point of the second resin composition. The temperature difference of the melting points in this case is, for example, 3 ℃ or more, preferably 5 ℃ or more, more preferably 10 ℃ or more, and further preferably 15 ℃ or more. The upper limit of the temperature difference is not particularly limited, and is about 90 ℃ or less. Further, specific components of the first resin composition and the second resin composition are not particularly limited, but for example, polypropylene may be used as the main component of the first resin composition, and polyethylene may be used as the main component of the second resin composition. In this case, linear low-density polyethylene is preferably used. The main component of the resin composition is a resin component that is contained in the resin components in the entire resin composition forming a single layer or in each of the resin compositions forming a plurality of layers. For example, the main component of the first resin composition may be linear low-density polyethylene, and the main component of the second resin composition may be linear low-density polyethylene having a lower density than the first resin composition. Alternatively, the main component of the first resin composition may be polyethylene, and the main component of the second resin composition may be Ethylene Vinyl Acetate (EVA). The melting point of the resin composition (second resin composition in the above example) forming the surface on the opposite side to the engaging portion is preferably 110 ℃ or lower, more preferably 105 ℃ or lower, and still more preferably 100 ℃ or lower. The lower limit of the melting point is not particularly limited, and is about 60 ℃ or higher.

In addition, the base strips 123, 124 can include portions other than the

first portions

123A, 124A and the

second portions

123B, 124B. For example, in the above example, each base strip is composed of two layers of the first and second portions, but in other examples, the base strip may be composed of three or more layers. For example, by setting the melting point of the resin composition forming the

female engagement portions

121A and 121B and the male engagement portion 122 to be lower than the melting point of the first resin composition, the squashing property of the end portions is improved at the time of bag making, and the occurrence of a defect of leakage from the outside due to a pinhole or the like can be suppressed. The zipper tape 120 is formed by, for example, coextrusion molding of the first and second resin compositions, but is not limited to the following: since the interface between the

first portion

123A, 124A and the

second portion

123B, 124B melts at the time of sealing, the

first portion

123A, 124A and the

second portion

123B, 124B can be clearly identified after manufacture of the bag with the zipper tape.

By setting the thickness of each of the

first portions

123A, 124A, the

second portions

123B, 124B, and the thickness of the entire base strips 123, 124 within the predetermined range described below, welding between the base strip 123 and the base strip 124 at the time of sealing to the first surface 111 and the second surface 112 can be prevented.

Specifically, the thickness of each of the

first portions

123A and 124A is, for example, 100 μm or more, preferably 110 μm or more, and more preferably 120 μm or more. The thickness of each of the

first portions

123A and 124A is, for example, 600 μm or less, preferably 350 μm or less, and more preferably 320 μm or less. The thickness of each of the

first portions

123A, 124A includes the height of a protrusion such as a rib described later, and does not include the height of the

engagement portions

121A, 121B, 122. The height of the ribs is, for example, 50 μm or more, preferably 70 μm or more, and more preferably 80 μm or more. The height of the ribs is, for example, 500 μm or less, preferably 350 μm or less, and more preferably 200 μm or less.

On the other hand, from the viewpoint of sealing property described later, the thickness of each of the

second portions

123B, 124B is, for example, 5 μm or more, preferably 10 μm or more, and more preferably 20 μm or more. The thickness of each of the

second portions

123B and 124B is, for example, 100 μm or less, preferably 80 μm or less, and more preferably 60 μm or less. The thickness of each of the

second portions

123B and 124B includes the height of a protrusion, such as a thick portion described later.

The entire thickness of the base strips 123, 124 including the

first portions

123A, 124A and the

second portions

123B, 124B is, for example, 105 μm or more, preferably 110 μm or more, and more preferably 120 μm or more. The entire thickness of the base strips 123, 124 including the

first portions

123A, 124A and the

second portions

123B, 124B is, for example, 700 μm or less, preferably 400 μm or less, and more preferably 350 μm or less. The entire thickness of the base strips 123, 124 including the

first portions

123A, 124A and the

second portions

123B, 124B includes the height of a protrusion such as a rib or a thick portion described later, and does not include the height of the engaging

portions

121A, 121B, 122.

In addition, when the insert plate is not sandwiched in the step of joining the base strips 123 and 124 to the first surface 111 and the second surface 112, respectively, as described above, there is a possibility that the joining may be insufficient as compared with the case where the base strips 123 and 124 are sandwiched between the seal bars 510 and 520 and the plate. In contrast, for example, the thickness of each of the

second portions

123B and 124B constituting the sealing layer can be set to the above-described range to improve the sealing property. Specifically, the thickness of each of the

second portions

123B, 124B is, for example, 100 μm or less, preferably 80 μm or less, and more preferably 60 μm or less. Thus, for example, even when the temperature of the sealing

rods

510 and 520 is adjusted to a relatively low temperature so that the temperature of the base strips 123 and 124 at the time of sealing is lower than the melting point of the first resin composition, the base strips 123 and 124 can be reliably joined to the first surface 111 and the second surface 112.

In the above-described embodiment of the present invention, in the buckle band 120, the minimum distance d between the female member 120A and the male member 120B when the

female engagement portions

121A and 121B and the male engagement portion 122 are engaged with each other _min The thickness of the zipper tape 120 is reduced to 1.1mm or less. This makes it easy to prevent the occurrence of pin holes in the bag with the fastener tape 120 due to flattening of the end portion thereof, and to improve the handling property by reducing the volume height of the bag with the fastener tape when the bag is bound.

The engaging portions formed in the zipper tape 120 are formed with female engaging

portions

121A and 121B and a male engaging portion 122 in the illustrated example, but the shape is not limited to the illustrated example, and various known shapes of engaging portions of zipper tapes in combination such as a claw shape, a hook shape, or a nub shape can be adopted. In the illustrated example, a pair of

female engagement portions

121A and 121B and a male engagement portion 122 are formed, but two or more pairs of engagement portions may be formed. In this case, one or more pairs of engaging portions having different shapes (for example, a male type, a female type, and a hook type) may be disposed, or two or more pairs of engaging portions having the same shape (for example, a male type and a female type) may be disposed.

Fig. 4 is a diagram for explaining a configuration example of the base strip. In fig. 4, only the male side member 120B including the male engaging portion 122 and the base strip 124 in the fastening tape is illustrated, but the female side member 120A including the female

engaging portions

121A and 121B and the base strip 123 may have the same configuration. In the example shown in fig. 4,

thick portions

125A and 125B are formed on the surface of the base strip 124 on the opposite side to the male engagement portion 122. These thick portions are formed with a width smaller than half the width of the base strip 124 except for the end portions in the width direction (left-right direction in the drawing) of the base strip 124, and are portions that protrude relatively to portions (denoted by reference numeral 127) that are not thick portions. By forming such a thick portion, the contact between the base strip 124 and the second surface 112 is stable during sealing, and stable sealing can be performed at a lower temperature of the seal bars 510 and 520, for example. Further, by securing a thickness necessary for sealing in the thick portion and thinning the base strip in a portion other than the thick portion, the amount of resin in the base strip can be reduced.

In the example of fig. 4,

inclined surfaces

128A and 128B are formed on both sides of the

thick portions

125A and 125B in the width direction of the base strip 124. By providing the

inclined surfaces

128A and 128B on both sides of the

thick portions

125A and 125B, stable contact between the base strip 124 and the second surface 112 during sealing can be maintained, and air bubbles can be prevented from being generated after sealing by air remaining in the portion (denoted by reference numeral 127) between the thick portions. The groove portion 126 formed at the top of the thick portion 125A is used as a mark for identifying the orientation of the snap, but it is not essential.

Fig. 5 and 6 are diagrams for explaining another configuration example of the base band. In fig. 5 and 6, only the male side member 120B including the male engaging portion 122 and the base strip 124 in the fastener tape is illustrated, but the female side member 120A including the female

engaging portions

121A and 121B and the base strip 123 may have the same configuration. In the example shown in fig. 5,

thick portions

125A, 125B, 125C, and 125D are formed on the surface of the base strip 124 on the side opposite to the male engagement portion 122. These thick portions are formed at portions other than the end portions in the width direction (the left-right direction in the drawing) of the base strips 124, and protrude relative to portions (denoted by reference numeral 127) other than the thick portions. The top portions of the thick portions 125A to 125D may be recessed in a dish shape as in the illustrated example. The protrusion 129 formed between the

thick portions

125A and 125B is used as a mark for identifying the orientation of the snap, but it is not essential.

In the example shown in fig. 6,

thick portions

125A, 125B, 125C, 125D, and 125E are formed on the surface of the base strip 124 on the side opposite to the male engagement portion 122. These thick portions are formed at the ends of the base strip 124 other than the width direction (left-right direction in the drawing) and protrude relative to the portions (denoted by reference numeral 127) other than the thick portions. Unlike the example of fig. 5, the top portions of thick portions 125A to 125E are flat. By forming the thick portion as in the example of fig. 5 and 6, the contact between the base strip 124 and the second surface 112 can be stabilized during sealing. By forming such a thick portion, the contact between the base strip 124 and the second surface 112 can be stabilized at the time of sealing. Further, by securing a thickness necessary for sealing in the thick portion and thinning the base strip in a portion other than the thick portion, the amount of resin in the base strip can be reduced.

The configuration of the base strip described above with reference to fig. 4 to 6 is not limited to the fastener tape described as an embodiment of the present invention in which the minimum distance between the female member and the male member when the female engagement portion and the male engagement portion are engaged with each other is 1.1mm or less, and can be applied to various fastener tapes.

Fig. 7 is a diagram for explaining still another configuration example of the base strip. In the example shown in fig. 7, a rib 221 is formed on the same surface as the

female engagement portions

121A and 121B of the base strip 123, and a rib 222 is formed on the same surface as the male engagement portion 122 of the base strip 124. For example, by forming the

ribs

221 and 222 in addition to the engaging portion side surface of the base web using the resin composition having a high melting point as described above, the space between the base web 123 and the base web 124 is maintained during heat sealing, and welding can be easily prevented. In the illustrated example, a thick portion 223 having a flat top is formed on the same surface as the

female engagement portions

121A and 121B of the base strip 123, and a similar thick portion 224 is formed on the same surface as the male engagement portion 122 of the base strip 124. The

thick portions

223, 224 are used as a mark for identifying the orientation of the catch, but they are not essential. In order to prevent welding of the

thick portions

223 and 224, the positions of the

thick portions

223 and 224 are preferably shifted with respect to the width direction of the zipper tape.

In the example of fig. 7, the distance between the

ribs

221 and 222 when the base strip 123 and the base strip 124 face each other and the

female engagement portions

121A and 121B and the male engagement portion 122 are engaged with each other is the minimum distance d between the female member 120A and the male member 120B _min The minimum spacing d _min Is 1.1mm or less. Minimum spacing d _min The preferred ranges of (d) are the same as in the example of fig. 1 described above.

In the example of fig. 7, the

ribs

221 and 222 face each other at the same position in the width direction (the left-right direction in the drawing) of the zipper tape 120, and thus the distance between the tops of the

ribs

221 and 222 is illustrated as the minimum distance d _min . For example, when the positions of the

ribs

221 and 222 are shifted from each other in the width direction of the zipper tape 120, the distance d from the base strips 123 and 124 may be set as described above _base The minimum distance d is calculated by subtracting (the maximum value of) the projection height of a projection such as a rib or a thick portion formed on the surface on the engaging portion side _min . Specifically, the protrusion height d of the

ribs

221 and 222 can be used _rib1 、d _rib2 As d _min ＝d _base -d _rib1 -d _rib2 And calculate the minimum spacing d _min 。

In the embodiment of the present invention, the distance d between the base strips 123, 124 can be set _base Since the protrusion height d is set small, for example, when the protrusions protrude with a displacement in the width direction of the zipper tape 120 _rib1 、d _rib2 Becomes close to the interval d _base As a result, d may also be present _min ＝d _base -d _ribl -d _rib2 And the calculated minimum interval d _min Negative values. In this case, the minimum spacing d is considered _min Is substantially 0.

Fig. 8 is a diagram for explaining a modification of the embodiment of the present invention. In the illustrated example, the zipper tape 120 is disposed so as to be in contact with the housing space SP formed between the first surface 111 and the second surface 112 of the bag main body. The base strip 123 is not joined to the first surface 111 on the side of the storage space SP with respect to the

female engagement portions

121A and 121B, and is joined to the first surface 111 on the side of the opening 101 of the bag main body opposite to the storage space SP with respect to the

female engagement portions

121A and 121B. On the other hand, the base strip 124 is joined to the second surface 112 on both the storage space SP side and the opening 101 side with respect to the male engagement portion 122. With such a structure, for example, as described in international publication No. 2015/005214, it is possible to achieve both the internal pressure resistance and the easy-opening property of the buckle-equipped bag. In the above-described embodiment of the present invention, when the

female engagement portions

121A and 121B and the male engagement portion 122 are made smaller than conventional ones, the engagement strength is reduced, and therefore, it is advantageous to improve the internal pressure resistance by the above-described structure.

In the above description, an example of a bag body in which the container body is a bag shape has been described, but a container with a buckle tape in which a buckle tape is joined to a container body other than a bag shape may be provided.

[ examples ] A

Next, examples of the present embodiment will be explained. In examples 1 to 4 shown in table 1 below, the lower limit of the sealing temperature at which the base strip and the film can be joined (minimum sealing temperature) and the upper limit of the sealing temperature at which fusion between the base strips does not occur at the time of sealing (maximum sealing temperature) were measured. In each example, the first portion of the base strip was made of atactic polypropylene (density 900 kg/m) ³ Melt Flow Rate (MFR) of 7.0g/10 min, melting point 132 ℃ C.) 100% by mass. The second part of the base strip was made of metallocene linear low density polyethylene (density 900 kg/m) ³ MFR4.0g/10 min, melting point 95 ℃ C.) as the main component.

[ TABLE 1]

Table 1: thickness and sealing temperature in the examples

In the above-described embodiments, the minimum sealing temperature was 110 ℃ in examples 2 to 4 in which the thickness of the second portion was 28 μm to 31 μm, whereas the minimum sealing temperature was 105 ℃ in example 1 in which the thickness of the second portion was 40 μm, and it is considered that there was a correlation between the thickness of the second portion and the sealing property with the film. On the other hand, in examples 2 to 4, the maximum sealing temperature increased as the thickness of the first portion increased, and it was found that the welding between the base strips at the time of sealing could be suppressed by increasing the thickness of the first portion and the entire base strip. In example 1 in which the ribs were formed on the surfaces of the base strips facing each other, the maximum sealing temperature was also increased, and it was found that the formation of the ribs also suppressed the welding between the base strips at the time of sealing.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to these examples. It is obvious to those skilled in the art to which the present invention pertains that various modifications and alterations can be made within the scope of the technical idea described in the claims, and it is needless to say that these modifications also fall within the technical scope of the present invention.

Description of the reference numerals

111 a first side; 112 second face; 120a zipper tape; a 120A female side member; 120B male side member; 121A, 121B female engagement portions; 122 a male engaging portion; 123. 124a base strip; 123A, 124A first portion; 123B, 124B second portion; 125A, 125B, 125C, 125D, 125E, 223, 224 thick-walled portions; 128A, 128B inclined surfaces; 221. 222 ribs; 510. 520 sealing the rod; SP storage space.

Claims

1. A fastener tape, wherein,

the buckle tape includes:

a first member including a first base strip and a first engaging portion protruding from the first base strip; and

a second member including a second base strip and a second engaging portion that protrudes from the second base strip and is engageable with the first engaging portion,

the first base strip and the second base strip are opposite to each other, and the minimum distance between the first member and the second member when the first clamping part and the second clamping part are clamped with each other is less than or equal to 1.1mm.

2. The buckle strap of claim 1,

the first base strip and the second base strip each comprise: a first portion including a surface from which the first engaging portion or the second engaging portion protrudes; and a second portion including a surface on a side opposite to the first engaging portion or the second engaging portion,

the first resin composition forming the first part has a melting point higher than that of the second resin composition forming the second part.

3. The buckle strap of claim 2,

the main component of the first resin composition is polypropylene, and the main component of the second resin composition is polyethylene.

4. The buckle tape according to claim 2 or 3,

the thickness of the first portion is 100 [ mu ] m or more,

the second portion has a thickness of 5 μm or more,

the first base strip and the second base strip each have a thickness of 105 μm or more.

5. The buckle tape according to any one of claims 1 to 4,

the first member has a first rib formed on a surface on the same side as the first engaging portion,

the second member has a second rib formed on the same side surface as the second engaging portion,

the first base strip and the second base strip are opposite to each other, and the minimum distance between the first rib and the second rib when the first clamping part and the second clamping part are clamped with each other is less than or equal to 1.1mm.

6. The buckle tape according to any one of claims 1 to 5,

the first base strip and the second base strip each have a thick portion formed on a surface on a side opposite to the first engaging portion or the second engaging portion.

7. The buckle strap of claim 6,

the thick-walled portion is formed to have a width smaller than half of the width of the first base strip and the second base strip, except for the width-direction end portions of the first base strip and the second base strip.

8. A container with a zipper tape, wherein,

the container with the buckle is provided with:

the zipper tape of any one of claims 1 to 7; and

a container body having a first face engaging the first base strip and a second face engaging the second base strip.

9. The buckle-strap container of claim 8,

the first engaging portion is a female engaging portion, the second engaging portion is a male engaging portion,

the zipper tape is disposed in contact with a storage space formed between the first surface and the second surface,

the first base strip is not joined to the first surface on the side of the housing space with respect to the first engagement portion, and is joined to the first surface on the side opposite to the housing space with respect to the first engagement portion.

10. The buckle-strap container of claim 8 or 9, wherein,

the container body is bag-shaped.

11. A method for manufacturing a container with a fastener tape according to any one of claims 8 to 10, wherein,

in the step of inserting the clip tape into the inside of the container body and joining the first base strip and the second base strip to the first surface and the second surface, respectively, an insert plate is not interposed between the first base strip and the second base strip.