WO2023090410A1 - Contenant à bande de fermeture à glissière - Google Patents

Contenant à bande de fermeture à glissière Download PDF

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Publication number
WO2023090410A1
WO2023090410A1 PCT/JP2022/042791 JP2022042791W WO2023090410A1 WO 2023090410 A1 WO2023090410 A1 WO 2023090410A1 JP 2022042791 W JP2022042791 W JP 2022042791W WO 2023090410 A1 WO2023090410 A1 WO 2023090410A1
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WO
WIPO (PCT)
Prior art keywords
zipper tape
base
storage space
container
region
Prior art date
Application number
PCT/JP2022/042791
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English (en)
Japanese (ja)
Inventor
誠之 北島
俊一 伊藤
拓人 小川
Original Assignee
出光ユニテック株式会社
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Filing date
Publication date
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Publication of WO2023090410A1 publication Critical patent/WO2023090410A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package

Definitions

  • the present invention relates to a container with a zipper tape.
  • Patent Literature 1 describes such a bag-like container provided with a steam venting mechanism for preventing excessive expansion and bursting during cooking.
  • the bag-shaped container described in Patent Document 1 is formed with a weakened seal portion whose peripheral edge is weakened and sealed to the bag body so as to close a circular notch provided near the side seal portion of the bag body. It has an extraction mechanism. When the internal pressure rises to a certain extent due to the steam generated during cooking, the steam release mechanism peels off the weakened seal and releases steam from the notch, preventing the bag body from excessively expanding and bursting. .
  • Patent Literature 3 describes a technique for easily forming a vapor outlet capable of stably releasing water vapor by bonding between a film and a portion other than the low bonding strength layer.
  • Patent Literature 3 describes a technique in which such a steam outlet is formed in a section that is eccentrically arranged with respect to the center in the longitudinal direction of the zipper tape.
  • a container body having at least a first surface and a second surface facing each other and having a storage space formed between the first surface and the second surface; and the first surface.
  • a first base disposed between the second surface and defining one side of the storage space and joined to the first surface; a first engaging portion protruding from the first base;
  • zipper tape comprising: a second base joined to the second surface; and a zipper tape including a second engaging portion protruding from the second base and capable of being engaged with the first engaging portion
  • a low bonding strength layer is formed in a portion of the second base facing the second surface so that bonding strength to the container body is lower than that of other portions of the zipper tape.
  • the bonding region between the second base and the second surface is the first base where the second base is bonded to the second surface at a portion other than the low bonding strength layer
  • the shortest distance from the center of the storage space to the first bonding area includes a bonding area and a second bonding area where the second base is bonded to the second surface only by the low bonding strength layer.
  • a container with a zipper tape wherein the distance is equal to or greater than the shortest distance from the center of the storage space to the second joint area.
  • the low bonding strength layer is located at an intermediate portion between the root portion of the second engaging portion of the second base portion and the end portion opposite to the storage space.
  • the first joint region is formed on the side opposite to the storage space with respect to the low joint strength layer, and the second joint region is formed so that the joint region protrudes toward the storage space.
  • first base disposed between the second surface and defining one side of the storage space and joined to the first surface; a first engaging portion protruding from the first base;
  • zipper tape comprising: a second base joined to the second surface; and a zipper tape including a second engaging portion protruding from the second base and capable of being engaged with the first engaging portion A container, wherein the portion of the second base facing the second surface is different from the first resin composition forming the first base and the remainder of the second base
  • the joint region between the second base and the second surface is formed of the second resin composition, and the joint region between the second base and the second surface is the portion where the second base is formed of the first resin composition.
  • the container with a zipper tape according to any one of [1] to [3], wherein the second joint region does not overlap with the longitudinal center of the zipper tape.
  • the second joint region is formed in the first section in the longitudinal direction of the zipper tape, and is the distance Y from the center in the longitudinal direction of the zipper tape to the middle portion in the longitudinal direction of the first section.
  • the zipper tape-attached container according to any one of [1] to [4], wherein the ratio Y/X to the half length X of the opening width of the zipper tape-attached container is 0.15 or more.
  • Any one of [1] to [6], wherein the peel strength between the second base and the second surface in the second bonding region is 30 N/50 mm or less. container with zipper tape.
  • the shortest distance from the center of the storage space to the first joint region is equal to or greater than the shortest distance from the center of the storage space to the second joint region, so that when the contents are heated, the first The vapor pressure over the bond area is less than or equal to the vapor pressure over at least a portion of the second bond area. Therefore, before the second base is pulled with a strong force through the first joint region, the bond in the second joint region is broken to form a steam outlet, and steam can be released stably.
  • FIG. 1 is a plan view of a bag with a zipper tape according to the first embodiment of the present invention
  • FIG. FIG. 2 is a cross-sectional view of the bag with zipper tape shown in FIG. 1 taken along the line II-II.
  • FIG. 2 is a sectional view taken along the line II-II when the contents of the zipper tape-equipped bag shown in FIG. 1 are heated;
  • FIG. 2 is a cross-sectional view of the bag with zipper tape shown in FIG. 1, taken along line III-III.
  • FIG. 4 is a diagram for explaining the arrangement of joint regions according to the first embodiment of the present invention; It is a figure for demonstrating the measuring method of peel strength. It is a figure which shows the example of arrangement
  • FIG. 5 is a plan view of a bag with a zipper tape according to a second embodiment of the present invention
  • FIG. 10 is a cross-sectional view taken along the line XX of the zipper tape-equipped bag shown in FIG. 9
  • FIG. 10 is a cross-sectional view taken along the line XX when the contents of the bag with the zipper tape shown in FIG. 9 are heated
  • FIG. 10 is a sectional view taken along line XI-XI of the zipper tape-equipped bag shown in FIG. 9
  • Fig. 1 is a plan view of a bag with a zipper tape according to the first embodiment of the present invention.
  • 2A, 2B and 3 are sectional views of the bag with zipper tape shown in FIG. 1, taken along line II-II and line III-III.
  • the zipper tape-attached bag 100 includes a bag-like container body formed by a film 110 having a first surface 111A and a second surface 111B facing each other, and a first surface of the film 110. 111A and a zipper tape 120 disposed between the second surface 111B.
  • the zipper tape 120 has at least a portion of its entire length in the width direction joined to the first surface 111A and the second surface 111B, thereby connecting the first surface 111A and the second surface of the film 110 together. 111B and defines one side of the storage space SP in which the content C is stored.
  • the film 110 is formed of, for example, a single layer or multiple layers of thermoplastic resin. More specifically, film 110 may be formed of low density polyethylene (LDPE), linear low density polyethylene (LLDPE), or polypropylene (PP). PP can be homopolypropylene (HPP), random polypropylene (RPP), or block polypropylene (BPP). When the film 110 is multi-layered, biaxially oriented polypropylene (OPP), biaxially oriented polyethylene terephthalate (OPET), or biaxially oriented nylon (ONy) may be used for the face substrate.
  • LDPE low density polyethylene
  • LLDPE linear low density polyethylene
  • PP polypropylene
  • HPP homopolypropylene
  • RPP random polypropylene
  • BPP block polypropylene
  • OPET biaxially oriented polyethylene terephthalate
  • ONy biaxially oriented nylon
  • the film 110 may also include a layer of inorganic material formed by vapor deposition of aluminum, lamination of aluminum foil, or the like.
  • the two films 110 are bonded together at the bottom seal portion 112 and the side seal portion 113 to form the container body having the first surface 111A and the second surface 111B.
  • the first surface 111A and the second surface 111B may be formed by folding one film 110 at portions corresponding to the side seal portions 113 .
  • the gusset may be formed by film 110 or by another film joined to film 110 .
  • the zipper tape-equipped bag 100 may be a standing pouch that can be placed upright by forming a gusset at the bottom.
  • the shape of the storage space SP formed by the bag 100 with zipper tape is substantially square in the illustrated example, but is not particularly limited.
  • the shape of the storage space SP may be vertically long (the dimension in the direction from the opening 101 toward the bottom seal portion 112 is long) or horizontally long (between the two side seal portions 113, that is, the length of the zipper tape 120). The dimension in the direction is longer), and it is preferably horizontally long.
  • the bottom seal portion 112 and the side seal portions 113 are formed, but the top seal portion is not formed so that the opening 101 of the bag 100 with zipper tape is formed.
  • a top seal portion is formed in addition to the bottom seal portion 112 and the side seal portions 113, and the opening 101 is formed in the zipper tape-equipped bag 100 afterwards by cutting between the top seal portion and the zipper tape 120.
  • the bag with the zipper tape may be provided without the bottom seal portion 112 formed, that is, the storage space SP is not sealed on the side opposite to the zipper tape 120 .
  • the bottom seal portion 112 is formed after filling the storage space SP with the contents.
  • the zipper tape 120 has a first base portion 121A joined to the first surface 111A, a second base portion 121B joined to the second surface 111B, and the first base portion 121A and the second base portion 121B joined to each other. It is an elongated member including engaging portions 122A, 123A and engaging portions 122B, 123B projecting from opposing surfaces and engaging with each other in a cross-sectional shape.
  • the zipper tape 120 is made of polyolefin resin, for example. More specifically, zipper tape 120 may be formed of low density polyethylene (LDPE), linear low density polyethylene (LLDPE), or polypropylene (PP).
  • LDPE low density polyethylene
  • LLDPE linear low density polyethylene
  • PP polypropylene
  • PP can be homopolypropylene (HPP), random polypropylene (RPP), or block polypropylene (BPP).
  • Polyolefin-based resins are not limited to fossil fuel-derived resins, and may be environmentally friendly bioplastics (polyolefin-based resins such as biomass-derived bio-polyethylene or bio-polypropylene). It may be a mixture of plastics.
  • Known additives such as stabilizers, antioxidants, lubricants, antistatic agents, or colorants may be added to the material of the zipper tape 120, if necessary.
  • the engaging portion 122A is male
  • the engaging portion 122B is female
  • the engaging portions 123A and 123B are hook-shaped.
  • the shape of the engaging portion of the zipper tape is not limited to the illustrated example, and various known shapes of the engaging portion of the zipper tape, such as claw-like, hook-like, or knob-like, can be employed.
  • two pairs of engaging portions are shown in the illustrated example, the number of engaging portions may be one, or three or more. In the illustrated example, each pair of engaging portions (male, female, and hook-shaped) having different shapes is arranged. or more may be arranged.
  • Engaging portions 122A, 123A and engaging portions 122B, 123B allow zipper tape attached bag 100 to be sealed, opened, and resealed.
  • the low bonding strength layer 124 is formed on a portion of the second base portion 121B facing the second surface 111B on the opening 101 side (opposite side to the storage space SP) with respect to the engaging portions 122B and 123B. is formed.
  • the low bonding strength layer 124 is a layer configured to have a lower bonding strength with the film 110 than other portions of the zipper tape 120 .
  • the other part of the zipper tape 120 is made of polypropylene
  • the low bonding strength layer 124 is made of polyethylene, or a mixture of polyethylene and polypropylene (LLDPE, a mixture of LDPE and high density polyethylene (HDPE), Or a mixture of LDPE and polypropylene is exemplified), so that the bonding strength of the low bonding strength layer 124 with the film 110 is lower than the bonding strength between the other part of the zipper tape 120 and the film 110 can be done.
  • the low bonding strength layer 124 is formed with the same thickness as the second base portion 121B, but in other examples, the low bonding strength layer 124 is thinner than the second base portion 121B, and the thickness of the second base portion 121B is less than that of the second base portion 121B. It is preferable that the low bonding strength layer 124 is formed only on the second surface 111B side of the base portion 121B. In that case, a bonding layer is preferably formed between the second base portion 121B and the low bonding strength layer 124 .
  • the bonding layer is composed of, for example, a resin composition as described later.
  • the low bonding strength layer 124 may be laminated on the second surface 111B side of the second base 121B formed with the same thickness as the other portions.
  • the zipper tape 120 including the low bonding strength layer 124 is manufactured, for example, by co-extrusion molding the resin material forming the low bonding strength layer 124 and the resin material forming the other portion.
  • the low bonding strength layer 124 is formed by extruding a portion including the second base 121B, and then applying the material resin of the low bonding strength layer 124 to a predetermined region on the second surface 111B side of the second base 121B.
  • the low bonding strength layer 124 is positioned closer to the opening 101 than the engaging portion, but the low bonding strength layer 124 extends to the opposite side of the opening 101, that is, to the storage space SP side. good too.
  • the resin composition forming the low bonding strength layer 124 is different from the resin composition forming the second base portion 121B.
  • the bonding strength between the low bonding strength layer 124 and the second surface 111B is reduced to that between the other portion of the second base 121B and the second surface 111B. It can be lower than the bonding strength.
  • the resin composition forming the second base portion 121B (simply referred to as the base portion) is polypropylene, and the resin composition forming the low bonding strength layer 124 is polyethylene.
  • a bonding layer is formed between the second base portion 121B and the low bonding strength layer 124 as described above.
  • the bonding strength between the low bonding strength layer 124 and the second surface 111B can be reduced to that of the other portions of the second base 121B and the second surface 111B. It may be lower than the bonding strength between the second surface 111B.
  • Tm means melting point.
  • the first base portion 121A is joined to the first surface 111A over the entire length of the zipper tape 120. Since the low bonding strength layer is not formed on the first base portion 121A, the region where the first base portion 121A is bonded to the first surface 111A is arbitrary.
  • the second base portion 121B is also joined to the second surface 111B over the entire length of the zipper tape 120. As shown in FIG. 1, the second base portion 121B and the second surface 111B are heat sealed or ultrasonically sealed.
  • the bonding area 140 to be bonded by sealing includes a first bonding area 141 and a second bonding area 142 . In the first bonding region 141, as shown in FIG.
  • the second base portion 121B is bonded to the second surface 111B at portions other than the low bonding strength layer 124 (even if the low bonding strength layer 124 is also bonded). good).
  • the second bonding region 142 the second base portion 121B is bonded to the second surface 111B only with the low bonding strength layer 124 as shown in FIG. 2A. That is, in the second bonding region 142, the bonding region between the low bonding strength layer 124 and the second surface 111B faces both the storage space SP side and the opening 101 side (opposite side to the storage space SP). are doing.
  • the low bonding strength layer 124 is formed between the root portion of the engaging portion 122B of the second base portion 121B and the end portion on the opening 101 side (opposite side to the storage space SP). Since it is formed in the intermediate portion between the low bonding strength layers 124 , there is a region that is not the low bonding strength layer 124 on the opening 101 side of the low bonding strength layer 124 . As shown in FIG. 1 , the first bonding region 141 of the bonding regions 140 is formed on the storage space SP side with respect to the low bonding strength layer 124 , and the second bonding region 142 is formed between the bonding region 140 and the opening 101 . is formed by projecting to the opposite side, that is, to the storage space SP side.
  • the second base 121B is attached to the second surface 111B of the film 110 by a first bond area 141 and a second bond area 142 as shown in FIGS. 2A, 2B and 3 . It is installed with one side removed. Specifically, the second base portion 121B is only on the opposite side of the storage space SP from the positions of the engagement portions 122B and 123B in the width direction, and the film is bonded by the first bonding region 141 and the second bonding region 142. It is joined to the second surface 111B of 110 . With such a configuration, when the vapor pressure in the storage space SP increases during heating of the contents, as indicated by the arrows in FIG. A force in the shear direction acts along the width direction of the base of the .
  • the force in this direction causes one claw of the female engaging portion 122B and the male engaging portion 122A to be more strongly engaged, and the hooked engaging portions 123A and 123B to be more strongly engaged with each other. Therefore, it becomes difficult for the shape of the engaging portion to be released by the action of the steam pressure. In addition, this makes it easier for the vapor pressure in the storage space SP to act not only on the engaging portion but also on the second base portion 121B and the second surface 111B in a distributed manner.
  • FIG. 4 is a diagram for explaining the arrangement of joint regions in the first embodiment of the present invention.
  • the shortest distance d1 from the center SP_C of the storage space SP to the first joint region 141 is greater than or equal to the shortest distance d2 from the center SP_C of the storage space SP to the second joint region 142.
  • the center SP_C of the storage space SP can be specified, for example, as the intersection of diagonal lines in the planar shape of the substantially rectangular storage space SP as illustrated.
  • a center SP_C can be identified by drawing a diagonal line as described above from the intersection of these joint areas facing the storage space SP.
  • the joint region between the first base portion 121A of the zipper tape 120 and the first surface 111A of the film 110 is formed in any shape. is defined in relation to the placement of the bonding region 140 on the base 121B side of the base 121B side, specifically the first bonding region 141 and the second bonding region.
  • the center SP_C is set with reference to the junction region 140 of . Further, for example, it is possible to form a folded portion of the film 110 instead of the side seal portion 113. In that case, a diagonal line is drawn from the intersection of the folded portion, the bottom seal portion 112 and the bonding region 140, and the center SP_C can be identified.
  • the center SP_C of the planar shape of the outer edge of the storage space SP that does not include the folded portion is set.
  • the vapor pressure in the storage space SP during heating of the contents is highest at the center SP_C of the storage space SP, and decreases with increasing distance from the center SP_C.
  • the isobar SC indicating the vapor pressure in the storage space SP can be assumed to be a circle centered at the center SP_C of the storage space SP.
  • FIG. 4 shows a constant pressure line SC centered at the center SP_C and having a radius d1. Since the radius d1 is also the shortest distance from the center SP_C to the first bonding area 141 as described above, the vapor pressure applied to the first bonding area 141 when the contents are heated in the illustrated example corresponds to the isobar SC vapor pressure below
  • the shortest distance d2 from the center SP_C of the storage space SP to the second joint region 142 is equal to or less than the shortest distance d1 to the first joint region 141
  • at least a part of the second joint region 142 is illustrated. is inside or on the isobar SC with the radius d1.
  • the isobar SC is the circumference of a circle centered at the center SP_C and in contact with the first joint region 141 . Therefore, the vapor pressure applied to at least a portion of the second joint region 142 during heating of the contents is equal to or higher than the vapor pressure corresponding to the isobar SC.
  • the first bonding region 141 is a portion where the second base portion 121B is bonded to the second surface 111B at a portion other than the low bonding strength layer 124, it will not be destroyed even if the steam pressure increases.
  • the second base portion 121B is pulled with a strong force through the first joint region 141, thereby disengaging the engaging portions 122A and 122B and the engaging portions 123A and 123B, and the second joint region 142 is destroyed.
  • the zipper tape 120 may open before the steam outlet is formed.
  • the steam pressure applied to the first bonding region 141 during heating of the contents is reduced to the vapor pressure applied to at least a part of the second bonding region 142. below pressure. Therefore, before the second base portion 121B is pulled with a strong force through the first joint region 141, the second joint region 142 is destroyed to form a steam outlet, and the unintended opening of the zipper tape 120 by steam pressure is prevented. can be prevented.
  • the peel strength is preferably 30 N/50 mm or less, more preferably 20 N/50 mm or less, even more preferably 15 N/50 mm or less, and particularly preferably 10 N/50 mm or less.
  • the lower limit of the peel strength is not particularly limited, it is, for example, 1 N/50 mm.
  • the components of the resin composition forming the low bonding strength layer 124 and the sealing temperature when forming the bonding region 140 may be adjusted.
  • the peel strength as described above, the second bonding area 142 is destroyed at a lower steam pressure to form a steam outlet, thereby more reliably preventing unintended opening of the zipper tape 120 due to steam pressure. can be done.
  • the peel strength was measured by cutting the zipper tape 120 and the film 110 into 50 mm widths, leaving them at 23° C. and 50% humidity for about 24 hours, and testing them at 23° C. and 50% humidity as shown in FIG. is pulled at a tensile speed of 300 mm/min in the opposite direction forming an angle of about 180° along the width direction of the base 121B of the second base 121B, and the second bonding region 142 is destroyed to break the second base 121B and the second surface 111B. It can be calculated by measuring the maximum strength of the stress when the gap separates.
  • the tensile force can be measured using, for example, a digital force gauge manufactured by Imada Co., Ltd., but is not limited to this example.
  • FIG. 6 is a diagram showing an arrangement example of steam outlets in the first embodiment of the present invention.
  • the first longitudinal section S1 of the zipper tape 120 in which the second joint region 142 is formed may be arranged eccentrically with respect to the longitudinal center 120C.
  • the ratio of eccentricity is represented by the ratio Y/X of the distance Y from the longitudinal center 120C to the longitudinal middle part of the first section S1 to the half length X of the opening width of the bag 100 with zipper tape.
  • the width of the opening is the total length of the zipper tape 120 excluding the portion sealed by the side seal portion 113 .
  • Y/X is preferably 0.15 or more, more preferably 0.20 or more, still more preferably 0.40 or more, even more preferably 0.60 or more, and particularly preferably 0.80 or more.
  • the upper limit is not particularly limited and is less than 1.
  • a plurality of sections among the sections in which the steam outlet is formed are eccentric like the above-described first section S1 , from the longitudinal middle portion of each section to the longitudinal center 120C of the zipper tape 120 With the maximum distance Y as the distance Y, the above condition regarding Y/X should be satisfied.
  • the length W of the first section S1 in the longitudinal direction of the zipper tape 120 (approximately equal to the width of the formed steam outlet) is half the opening width of the zipper tape-attached bag 100.
  • the ratio W/X to X is preferably 0.04 or more, more preferably 0.05 or more, still more preferably 0.10 or more, and particularly preferably 0.15 or more.
  • the upper limit is not particularly limited, and is appropriately adjusted depending on the characteristics of the food used, and is, for example, 0.6. This is because if the width of the steam outlet is too narrow, the amount of deformation at the central portion in the longitudinal direction of the zipper tape 120 increases. If a plurality of sections among the sections in which the steam outlet is formed are eccentric like the first section S1 , the length W of any one section satisfies the above condition regarding W/X. should be filled.
  • FIG. 7 is a diagram showing a modification of the arrangement of joint regions in the first embodiment of the present invention.
  • a plurality of second joint regions 142A, 142B are provided in the longitudinal direction of the zipper tape 120.
  • the shortest distance from the center of the storage space SP to each of the second joint regions 142A and 142B is less than or equal to the shortest distance from the center of the storage space SP to the first joint region 141.
  • a rise in pressure is suppressed, and unintended opening of the zipper tape 120 due to steam pressure can be more reliably prevented.
  • two second bonding regions 142A and 142B are provided in the illustrated example, three or more second bonding regions may be provided.
  • the second joint regions 142A and 142B are provided at the center of the zipper tape 120 in the longitudinal direction without overlapping, but one of them overlaps the center of the zipper tape 120 in the longitudinal direction.
  • a second bonding area may be provided at the bottom.
  • FIG. 8 is a diagram showing a modification of the shape of the joint region in the first embodiment of the present invention.
  • the second joining area 142 has an asymmetrical shape with respect to the longitudinal direction of the zipper tape 120 . More specifically, the second joint region 142 has a shape in which the end edge on the side of the storage space SP is extended toward the longitudinal center of the zipper tape 120 . For example, when the position of the steam outlet is determined, the shape of the second joint region 142 may be extended along a line connecting the steam outlet and the center SP_C of the storage space SP.
  • the shape of the end of the extended second joint region 142 on the side of the storage space SP By making the shape of the end of the extended second joint region 142 on the side of the storage space SP into an acute angle, stress is concentrated when the steam pressure rises, and the second joint region 142 is expanded. It can be easily peeled off.
  • the tip of the second joint region 142 on the side of the storage space SP obtuse or rounded, the second joint can be formed from the center SP_C of the storage space SP due to positional deviation during formation of the joint region. It is possible to prevent the shortest distance d2 to the area 142 from fluctuating significantly.
  • the shape of the end of the second joint region 142 on the storage space SP side in this modified example is determined, for example, in consideration of the above factors.
  • the second joint region 142 By forming the second joint region 142 in the above-described shape, for example, even when the steam outlet is formed at a position away from the longitudinal center of the zipper tape 120, the second joint region 142 on the side of the storage space SP The edge can be brought closer to the center of the storage space SP, and the distance d2 can be less than or equal to the distance d1. As a result, when the content is heated, peeling starts from the end edge of the second joint region 142 on the side of the storage space SP before the vapor pressure applied to the first joint region 141 rises, forming a vapor outlet. It is possible to prevent the zipper tape 120 from being opened.
  • FIG. 9 is a plan view of a bag with zipper tape according to a second embodiment of the present invention.
  • 10A, 10B and 11 are cross-sectional views of the bag shown in FIG. 9 taken along line XX and line XI-XI.
  • the configuration of the zipper tape-equipped bag according to the present embodiment will be described below with reference to these drawings.
  • the zipper tape-attached bag 200 includes a bag-like container body formed by a film 110 having a first surface 111A and a second surface 111B facing each other, and a first surface of the film 110. and a zipper tape 220 disposed between 111A and second surface 111B.
  • the zipper tape 220 has at least a portion of its entire length in the width direction joined to the first surface 111A and the second surface 111B, thereby connecting the first surface 111A and the second surface of the film 110 together. It defines one side of the storage space SP formed between 111B. Note that the configuration of the film 110 is the same as that of the first embodiment described above, and redundant description will be omitted.
  • Zipper tape 220 includes first base 221A joined to first surface 111A, second base 221B joined to second surface 111B, and first base 221A and second base 221B joined to each other. It is an elongated member including, in a cross-sectional shape, an engaging portion 222A and an engaging portion 222B that protrude from opposing surfaces and are capable of engaging with each other.
  • the zipper tape 220 is formed, for example, by extrusion molding of polyolefin resin. More specifically, zipper tape 220 may be formed of low density polyethylene (LDPE), linear low density polyethylene (LLDPE), or polypropylene (PP). PP can be homopolypropylene (HPP), random polypropylene (RPP), or block polypropylene (BPP).
  • LDPE low density polyethylene
  • LLDPE linear low density polyethylene
  • PP polypropylene
  • HPP homopolypropylene
  • RPP random polypropylene
  • BPP block polypropylene
  • Polyolefin-based resins are not limited to fossil fuel-derived resins, and may be environmentally friendly bioplastics (polyolefin-based resins such as biomass-derived bio-polyethylene or bio-polypropylene). It may be a mixture of plastics. Known additives such as stabilizers, antioxidants, lubricants, antistatic agents, or colorants may be added to the material of the zipper tape 220, if necessary.
  • the engaging portions 222A and the engaging portions 222B are not limited to the shapes shown in the drawings, and various known shapes of the engaging portions of zipper tapes, such as claw-shaped, hook-shaped, or knob-shaped, are combined. It is possible to In addition, although one pair of engaging portion 222A and engaging portion 222B is arranged in the illustrated example, a plurality of pairs of engaging portion 222A and engaging portion 222B may be arranged. Engaging portion 222A and engaging portion 222B allow zipper tape bag 200 to be sealed, opened, and resealed.
  • the cross-sectional shape of the zipper tape 220 includes a first portion 225 made of the first resin composition and a second portion 226 made of the second resin composition.
  • the first portion 225 is made of a first resin composition
  • the second portion 226 is made of a second resin composition. More specifically, second portion 226 forms a portion of second base 221B (shown as surface 221B1) that faces second surface 111B.
  • the first portion 225 includes all of the first base portion 221A, the engaging portion 222A, and the engaging portion 222B, and a second surface (illustrated as surface 221B2) that faces the second surface 111B. It forms the rest of the base 221B.
  • the second resin composition forming the second portion 226 is a resin composition different from the first resin composition forming the first portion 225 .
  • the bonding strength between the first portion 225 and the second portion 226 during heating of the contents is increased between the first portion 225 and the second surface 111B and the second surface 111B. It is lower than the bonding strength between each of the first surfaces 111A and between the second portion 226 and the second surface 111B.
  • the first resin composition is polypropylene and the second resin composition is polyethylene.
  • a third resin composition may be used to form a third portion (not shown) between the second surface 111B and the second portion 226, or a third portion (not shown) may be formed between the second surface 111B and the second portion 226.
  • the bonding strength between the second portion 226 and the second surface 111B is increased by interposing an adhesive between the first portion 225 and the second surface 111B, and the first portion 225 and the second portion 226 can be relatively lower than the bond strength between the second portion 226 and the second surface 111B.
  • the bonding strength between the first portion 225 and the second portion 226 during heating of the contents can be adjusted to the first portion 225 and each of the second surface 111B and the first surface 111A and between the second portion 226 and the second surface 111B.
  • Tm means melting point.
  • the first base portion 221A is joined to the first surface 111A over the entire length of the zipper tape 220. Since the first base portion 221A is the first portion 225 entirely formed of the first resin composition, the region where the first base portion 221A is joined to the first surface 111A is arbitrary.
  • the second base portion 221B is also joined to the second surface 111B over the entire length of the zipper tape 220, but there is a joint region 240 where the second base portion 221B and the second surface 111B are joined by heat sealing or ultrasonic sealing. includes a first junction area 241 and a second junction area 242 . In the first bonding region 241, as shown in FIG.
  • the first portion 225 (surface 221B2) is bonded to the second surface 111B (the second portion 226 may also be bonded).
  • the second bonding region 242 as shown in FIG. 10A, the second base 221B is bonded to the second surface 111B only at the second portion 226 (surface 221B1). That is, in the second joint region 142, the joint region between the second portion 226 (surface 221B1) and the second surface 111B is located on both the storage space SP side and the opening 101 side (the side opposite to the storage space SP). facing the space.
  • the second portion 226 is formed between the root portion of the engaging portion 222B of the second base portion 221B and the end portion on the opening 101 side (opposite side to the storage space SP).
  • the first portion 225 exists closer to the opening 101 than the second portion 226 because it is formed in the intermediate portion between them.
  • the first joint region 241 of the joint region 240 is formed in the first portion 225 located on the storage space SP side with respect to the second portion 226, and the second joint region 242 is formed by projecting the joint region 240 to the side opposite to the opening 101, that is, to the side of the storage space SP.
  • the second base 221B is attached to the second surface 111B of the film 110 by a first bond area 241 and a second bond area 242 as shown in FIGS. 10A, 10B and 11 . It is installed with one side removed. Specifically, the second base portion 221B is attached to the film 110 by the first bonding region 241 and the second bonding region 242 only on the opposite side of the housing space SP from the position of the engaging portion 222B in the width direction. It is joined to the second surface 111B. With such a configuration, when the vapor pressure in the storage space SP increases during heating of the contents, as indicated by the arrows in FIG. A force in the shear direction acts along the width direction of the base of the .
  • the shape of the engaging portion is less likely to be released by the action of steam pressure.
  • this makes it easier for the vapor pressure in the storage space SP to act not only on the engaging portion but also on the second base portion 221B and the second surface 211B in a distributed manner.
  • the shortest distance from the center of the storage space SP to the first joint region 241 is the second joint region from the center of the storage space SP. 242 or greater.
  • the center of the storage space SP is defined in the same manner as described for the first embodiment above.
  • the peel strength between the first portion 225 and the second portion 226 is preferably 20 N/50 mm or less, more preferably 15 N/50 mm or less, and even more preferably 10 N/50 mm or less.
  • the lower limit of peel strength is not particularly limited, it is, for example, 1 N/50 mm.
  • the components of the resin composition forming the first portion 225 and the second portion 226 may be adjusted so that the peel strength falls within the above range.
  • a lower steam pressure breaks the bond between the first portion 225 and the second portion 226 to form a steam outlet, resulting in unintended zipper tape peeling due to steam pressure. 220 can be more reliably prevented from opening.
  • the modified examples of the arrangement and shape of the joint regions as described with reference to FIGS. 6, 7 and 8 for the first embodiment can also be applied to the second embodiment.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Bag Frames (AREA)
  • Package Specialized In Special Use (AREA)

Abstract

La présente invention concerne un contenant à bande de fermeture à glissière qui comprend : un corps de contenant qui a un espace de stockage formé entre une première surface et une seconde surface qui sont opposées l'une à l'autre ; et une bande de fermeture à glissière qui comprend une première partie de base qui est reliée à la première surface, une première partie de mise en prise qui fait saillie à partir de la première partie de base, une seconde partie de base qui est reliée à la seconde surface, et une seconde partie de mise en prise qui fait saillie à partir de la seconde partie de base et peut venir en prise avec la première partie de mise en prise. Une région de jonction entre la seconde partie de base et la seconde surface comprend : une première région de jonction dans laquelle une partie de la seconde partie de base qui n'est pas une couche à faible résistance à l'assemblage est reliée à la seconde surface ; et une seconde région de jonction dans laquelle seule la couche à faible résistance à l'assemblage de la seconde partie de base est reliée à la seconde surface. La distance la plus courte par rapport à la première région de jonction à partir du centre de l'espace de stockage est égale ou supérieure à la distance la plus courte par rapport à la seconde région de jonction à partir du centre de l'espace de stockage.
PCT/JP2022/042791 2021-11-18 2022-11-18 Contenant à bande de fermeture à glissière WO2023090410A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-187816 2021-11-18
JP2021187816A JP2023074721A (ja) 2021-11-18 2021-11-18 ジッパーテープ付き容器

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WO2023090410A1 true WO2023090410A1 (fr) 2023-05-25

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TW (1) TW202327945A (fr)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013046644A (ja) 2012-12-07 2013-03-07 Q P Corp レトルトクリームソース、電子レンジ調理用容器詰食品及びクリーム煮料理の調理又は製造方法
WO2017119449A1 (fr) 2016-01-07 2017-07-13 出光ユニテック株式会社 Bande de fermeture à glissière, sac, et procédé de production de sac
JP2021024602A (ja) 2019-08-01 2021-02-22 出光ユニテック株式会社 ジッパーテープ付き容器およびジッパーテープ付き容器の製造方法
WO2021206150A1 (fr) * 2020-04-08 2021-10-14 凸版印刷株式会社 Pochette

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013046644A (ja) 2012-12-07 2013-03-07 Q P Corp レトルトクリームソース、電子レンジ調理用容器詰食品及びクリーム煮料理の調理又は製造方法
WO2017119449A1 (fr) 2016-01-07 2017-07-13 出光ユニテック株式会社 Bande de fermeture à glissière, sac, et procédé de production de sac
JP2021024602A (ja) 2019-08-01 2021-02-22 出光ユニテック株式会社 ジッパーテープ付き容器およびジッパーテープ付き容器の製造方法
WO2021206150A1 (fr) * 2020-04-08 2021-10-14 凸版印刷株式会社 Pochette

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