WO2007055161A1 - 咬合具、これを用いた袋およびこれらの製造方法 - Google Patents

咬合具、これを用いた袋およびこれらの製造方法 Download PDF

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Publication number
WO2007055161A1
WO2007055161A1 PCT/JP2006/322073 JP2006322073W WO2007055161A1 WO 2007055161 A1 WO2007055161 A1 WO 2007055161A1 JP 2006322073 W JP2006322073 W JP 2006322073W WO 2007055161 A1 WO2007055161 A1 WO 2007055161A1
Authority
WO
WIPO (PCT)
Prior art keywords
male
female
occlusal
occlusion
male member
Prior art date
Application number
PCT/JP2006/322073
Other languages
English (en)
French (fr)
Inventor
Kenichi Tanaka
Shuichi Goto
Original Assignee
Idemitsu Unitech Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Idemitsu Unitech Co., Ltd. filed Critical Idemitsu Unitech Co., Ltd.
Priority to US12/092,870 priority Critical patent/US8789247B2/en
Priority to EP06822987A priority patent/EP1946668B8/en
Priority to PL06822987T priority patent/PL1946668T3/pl
Priority to KR1020087013646A priority patent/KR101296550B1/ko
Publication of WO2007055161A1 publication Critical patent/WO2007055161A1/ja

Links

Classifications

    • 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
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/22—Articles comprising two or more components, e.g. co-extruded layers the components being layers with means connecting the layers, e.g. tie layers or undercuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/304—Extrusion nozzles or dies specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D5/00—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
    • B29D5/10—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners the interlocking members being formed by continuous profiled strip
    • 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
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2516—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor comprising tamper-indicating means, e.g. located within the fastener
    • 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
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • 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
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • B65D33/2558—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape the slide fastener having a non-constant section throughout the length of the fastener, e.g. slightly undulated interlocking members or castellated stringers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/15—Bag fasteners
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y10T24/2532—Zipper or required component thereof having interlocking surface with continuous cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/25—Zipper or required component thereof
    • Y10T24/2532—Zipper or required component thereof having interlocking surface with continuous cross section
    • Y10T24/2534—Opposed interlocking surface having dissimilar cross section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49782—Method of mechanical manufacture of a slide fastener

Definitions

  • the present invention relates to an articulating tool, a bag using the same, and a method of manufacturing the same. More specifically, the present invention relates to an occlusion device in which a male member having a male occlusion portion and a female member having a female occlusion portion can be separated and re-fitted, a bag using the same, and a method of manufacturing the same.
  • Chuck tapes that can be resealed after opening are used for bags (packaging bags) of food, pharmaceuticals, miscellaneous goods, and the like.
  • a conventional chuck tape is composed of a male member having a male occlusion portion and a female member having a female occlusion portion fitted to the male occlusion portion, and each is extruded separately.
  • the conventional bag with zipper tape does not have sufficient sealing performance before opening, and it is confirmed whether the zipper tape has been opened before use or foreign matter is mixed in during use. Was impossible.
  • Patent Document 1 a packaging bag with a zipper disclosed in Patent Document 1 has been proposed (see Patent Document 1).
  • This packaging bag with a zipper is formed by separately molding a male member having a male occlusal portion and a female member having a female occlusal portion with different synthetic resins and engaging them with each other. At the same time, the opposing surfaces of the male member and the male member are joined with a relatively small heat seal strength.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2004-155458
  • the male member and the female member are engaged and heat sealed at the opening of the bag, and at the same time, the opposing surface between the male member and the female member must be heat sealed with a small heat seal strength.
  • the two parts must be heat-sealed at different strengths at the same time! /
  • the opposing surfaces of the male member and female member should be heat-sealed with a strength that can be peeled off by hand. Therefore, it is difficult to obtain a bag with sufficient sealing performance.
  • the force of the male occlusal portion and the female occlusal portion is provided with a separate heat seal portion between the male member and the female member, that is, an opening portion.
  • the directional dimensions are large, making it unsuitable for small bags.
  • An object of the present invention is to provide an articulating device capable of ensuring sealing performance while maintaining peelability, and a bag using the articulating device.
  • another object of the present invention is to provide an articulating device and a bag manufacturing method capable of preventing falsification.
  • the occlusion device of the present invention is an occlusion device in which a male member having a male occlusion portion and a female member having a female occlusion portion fitted to the male occlusion portion can be separated and re-fitted. And at least the male occlusal portion and the female occlusal portion are pseudo-adhered or in contact with each other substantially without any gap.
  • ⁇ pseudo-adhesion refers to adhesion to such an extent that the male occlusion portion and the female occlusion portion can be peeled by hand.
  • the occlusal device of the present invention is provided in the opening portion of the bag body. If the male occlusion and the female occlusion are in normal “adhesion”, it will be difficult to open by hand. Even if the bag can be opened, the bag body or part of the bite may be torn or deformed, such as elongation, which may deteriorate the appearance and re-fit / resealability.
  • ⁇ pseudo-adhesion '' here means force that can be attached at a level of 50 NZ 50 mm or less and 25 NZ 50 mm or more, which will be described later. It's a problem!
  • the occlusal device of the present invention even when the male occlusal portion and the female occlusal portion are not bonded at all, that is, even when they are in contact with each other with substantially no gap, the direction in which both occlusal portions open is opened.
  • undercuts can be made between the male occlusion and the female occlusion, which may prevent problems such as the opening of the occlusion during distribution.
  • the male occlusal portion and the female occlusal portion are pseudo-adhered or in contact with each other substantially without any gap, so that a high sealing performance can be achieved and an appropriate peelability can be achieved. For example, manual peeling can be realized.
  • the male occlusion portion and the female occlusion portion also serve as an opening portion, it is suitable for a small bag that does not require an increase in width.
  • the occlusal device of the present invention is characterized in that the male member and the female member are formed by different types of grease.
  • heterogeneous rosin means varieties of varieties that are chemically different.
  • the component (main component) occupying 50% by mass or more of the composition or copolymer is the male member. It means that the chemical composition and the main component of the copolymer constituting the other of the female member are chemically different.
  • polypropylene and polyethylene, polypropylene and ethylene 'propylene copolymer (propylene units less than 50 weight 0/0) is a heterogeneous ⁇ .
  • Polypropylene and "yarn ⁇ of polypropylene with polyethylene (PP 50 Weight 0/0 or more)" is Do a heterogeneous ⁇ ! /,.
  • a male member and a female member are integrally formed by using different types of fats and in an occlusal state, the different kinds of fats are formed in respective shapes while keeping an interface with each other.
  • the resin forming the male member and the resin forming the female member are bonded to each other at the surface layer portion of different resins, so-called pseudo-bonded state. Can be obtained.
  • integrally molding it can be formed by coextrusion or sequential lamination molding.
  • the male member includes a band-shaped base having a joint surface, and the male occlusion formed integrally and projecting along the belt-like direction on the side surface opposite to the joint surface of the belt-shaped base.
  • the female member includes a belt-like base having a joint surface, and a groove-shaped female occlusal portion integrally formed along the belt-like direction on the side surface opposite to the joint surface of the belt-like base. It is preferable that 60% or more of the male member surface excluding the joint surface of the male member is in contact with the female member surface excluding the joint surface of the female member substantially without a gap.
  • the male member surface excluding the joint surface of the male member is in contact with the female member surface excluding the joint surface of the female member substantially without any gap, thereby achieving high sealing performance. It can.
  • the contact area of the male member surface excluding the joint surface of the male member may be 60% or more, preferably 70% or more, more preferably 90% or more.
  • the cross-sectional shape of the male occlusion portion and the groove cross-sectional shape of the female occlusion portion are formed in the same cross-sectional shape.
  • the cross-sectional shape of the male occlusion portion and the groove cross-sectional shape of the female occlusion portion that are engaged with each other are formed in the same cross-sectional shape, the male occlusion portion and the female occlusion portion are An occlusal state with contact without gaps is obtained. Accordingly, there is no gap between them, so that higher sealing performance can be achieved.
  • the occlusion device of the present invention it is preferable that at least a part of the female occlusal portion of the female member is in contact with the side surface of the male member opposite to the bonding surface of the band-shaped substrate.
  • the female mold of the female member is provided on the side surface of the male member opposite to the bonding surface of the band-shaped substrate. Since at least a part of the occlusal portion is in contact, the contact area between the male base and the female occlusion is added to the contact area between the male occlusion and the female occlusion. The contact area can be further increased and higher sealing performance can be achieved.
  • the portion where the female occlusal portion of the female member is in contact is preferably in the vicinity of the male occlusal portion of the male member, and more preferably in contact with both sides of the male occlusal portion.
  • a peeling start portion is formed at a boundary surface where the surfaces of the male member and the female member are in contact with each other.
  • the peeling start portion is a groove formed on one of the boundary surfaces where the surfaces of the male member and the female member are in contact.
  • the groove of the peeling start portion may be the same as the length in the band-like direction (longitudinal direction) of the bite, but may be provided intermittently in the band-like direction (longitudinal direction) of the bite.
  • Examples of the shape of the groove include a V-shaped groove and a rectangular groove, but the shape is arbitrary.
  • the peeling start portion can be formed with a simple configuration.
  • the peeling start portion can be formed together when the male member or the female member is formed.
  • the peel strength force between the male member and the female member is 50 N / 50 mm or less and 25 NZ 50 mm or more.
  • Such a structure is easy to peel off by hand. If the peel strength exceeds 50NZ50mm, it will be difficult to peel by hand, so 35NZ50mm or less is desirable. On the other hand, if it is too low, it may be accidentally opened at the time of distribution.
  • either the male member or the female member is formed of a polymer mainly composed of ethylene, and the other is formed of a polymer mainly composed of propylene. I prefer that.
  • the male member and the female member are separated. It is easy to improve the sealing performance. In particular, the male member and female member are separated and re-fitted. To achieve this, the deformation is great! It is desirable that the female member is formed of a polymer having ethylene as a main component with excellent flexibility and the male member is formed of a polymer having propylene as a main component.
  • a seal layer is formed on each joint surface side of the male member and the female member.
  • the male member and the female member are provided with the seal layer, even if the male member and the female member are made of different kinds of resins, the same material strength as that of the other member can be obtained. Fused to the bag body.
  • a bag of the present invention is characterized in that any one of the above-described biting devices is provided in an opening of a bag body.
  • the manufacturing method of the occlusal device of the present invention includes a male member having a male occlusal portion and a female member having a female occlusal portion fitted to the male occlusal portion by using different types of grease. It is characterized by being integrally formed in an occlusal state.
  • a male member having a male occlusal portion and a female member having a female occlusal portion fitted to the male occlusal portion are in a state of occlusion with different types of grease.
  • a resin having low compatibility is preferably selected as the foreign resin.
  • the male member having the male occlusal portion and the female member having the female occlusal portion fitted to the male occlusal portion are integrally formed by different types of grease and in an occlusal state.
  • the different types of coagulates are formed in their respective shapes while maintaining an interface with each other.
  • the resin forming the male member and the resin forming the female member are bonded to each other at the surface layer portion of the different resins, so-called pseudo-bonded, so that high sealing performance is obtained.
  • pseudo-bonded so that high sealing performance is obtained.
  • the strength at the second and subsequent opening will be small. Therefore, it is possible to discriminate whether the force is the first peeling time or the resealing time. Therefore, tampering Preventive effect can be expected.
  • FIG. 1 is a front view showing a bag that can be used in a first embodiment of the present invention.
  • FIG. 2 is a sectional view taken along the line II-II of the same embodiment.
  • FIG. 3 is a cross-sectional view showing a state where the bag of the embodiment is opened.
  • FIG. 4 is a sectional view showing a first modification of the embodiment.
  • FIG. 5 is a cross-sectional view showing a second modification of the embodiment.
  • FIG. 6 is a sectional view showing a second embodiment of the present invention.
  • FIG. 7 is a cross-sectional view showing a third embodiment of the present invention.
  • FIG. 8 is a sectional view showing a fourth embodiment of the present invention.
  • FIGS. Fig. 1 is a front view of the bag of the first embodiment.
  • 2 is a cross-sectional view taken along the line II-II of FIG. 1
  • FIG. 3 is a cross-sectional view of the bag opened.
  • the bag of the first embodiment includes a bag body 10 and an articulating tool 20 attached to an opening (opening portion) of the bag body 10.
  • the bag body 10 is configured by bonding (heat-sealing) the peripheral edges (each side) of two flat rectangular films 11 and 12 on the front and back sides!
  • Films 11 and 12 are single-layered films made of linear low-density polyethylene (LLDPE), and are produced by a known method such as a casting method, a melt extrusion method, or a calendar method.
  • the outer layers of stretched nylon ( ⁇ ), stretched polypropylene ( ⁇ ), stretched polyethylene terephthalate ( ⁇ ), and linear low density polyethylene (LLDPE), in which the films 11 and 12 have a single layer structure It may be a laminate with a sealant layer such as cast polypropylene (CPP).
  • the occlusal device 20 includes a male member 21 and a female member 26, which are integrally formed in an occluded state, and are configured to be peelable and re-engageable.
  • the male member 21 includes a belt-like base 22 having a joint surface 22 ⁇ , a male occlusal portion 23 formed integrally and projecting along a belt-like direction on a surface 22 ⁇ opposite to the joint surface 22 ⁇ of the belt-like substrate 22. And a sealing layer 24 provided on the bonding surface 22 mm of the belt-like substrate 22.
  • the male occlusal portion 23 has a shape in which the width dimension increases in a taper shape as it moves away from the surface (surface 22 mm) of the belt-like substrate 22 at the center in the width direction of the belt-like substrate 22 and then becomes a tapered shape, that is, a pentagonal cross section. Is formed.
  • the seal layer 24 is formed with a constant thickness and substantially the same width as the width of the band-shaped substrate 22.
  • the female member 26 includes a belt-like base body 27 having a joint surface 27 ⁇ , and a female occlusal portion 28 integrally formed on the surface opposite to the joint surface 27 ⁇ of the belt-like base body 27 along the belt-like direction.
  • a force is also formed with the seal layer 29 provided on the joint surface 27 mm of the belt-like substrate 27.
  • the female occlusal portion 28 is formed in a rectangular cross section having substantially the same width as the width of the belt-like base 27, and the occlusal groove 28 ⁇ having the same cross sectional shape (cross sectional pentagonal shape) as that of the male occlusal portion 23 on the side of the tip.
  • Have The seal layer 29 is formed to have a constant thickness and a width dimension substantially the same as the width dimension of the band-shaped substrate 27! Speak.
  • the male member 21 and the female member 26 are connected to the male occlusal portion 23 and the female occlusal portion 28 without a gap.
  • the surface 22B of the male member 21 opposite to the joint surface 22A of the band-shaped base 22 and the distal end surface of the female occlusal portion 28 of the female member 26 are in contact with each other without a gap.
  • 90% or more of the male member surface excluding the joining surface 22A of the male member 21 is in contact with the female member surface excluding the joining surface 27A of the female member 26 substantially without a gap. Therefore, in a state where the male member 21 and the female member 26 are engaged with each other, the cross section is formed in a rectangular shape having no gap inside.
  • the belt-like base body 22 and the male occlusal portion 23 constituting the male member 21 and the belt-like base body 27 and the female occlusion portion 28 constituting the female member 26 are different types of grease, specifically Is integrally formed of a polymer mainly composed of ethylene and a polymer mainly composed of propylene.
  • the female member 26 is molded from a polymer mainly composed of ethylene
  • the male member 21 is molded from a polymer composed mainly of propylene! RU
  • polymers mainly composed of ethylene include low density polyethylene and linear low density polyethylene (LLDPE).
  • Desirable polymers based on propylene include ethylene copolymers based on polypropylene, homopolypropylene, and polyolefin-based thermoplastic elastomers (TPO).
  • the sealing layers 24 and 29 are provided for fusing the male member 21 and the female member 26 formed of different types of grease to the same bag body 10.
  • the sealing layers 24 and 29 should be made of a meta-mouth LL. Is desirable.
  • the bag In manufacturing the bag, first, after obtaining the bite 20 in the bite molding process, the bag is manufactured in the bag making process.
  • the male member 21 and the female member 26 are occluded by different types of grease.
  • the occlusion device 20 is obtained by integrally molding in the state.
  • a copolymer containing propylene as the main component (wax forming the band-shaped substrate 22 and the male occlusal portion 23 of the male member 21) and a copolymer containing ethylene as the main component (of the female member 26).
  • the occlusion tool 20 formed in the occlusion tool forming process is heat-sealed or bonded to the opening of the bag body 10 while being in the occlusion state to form a bag.
  • the occlusion device 20 formed by the occlusion device molding process is heated in the occlusion state in the opening (opening portion) of the single-layered film 11, 12 made of linear low density polyethylene (LLDPE).
  • LLDPE linear low density polyethylene
  • the male member 21 and the female member 26 that are heat-sealed or bonded to the opening of the bag main body 10 are integrally formed in an occlusal state.
  • the resin forming the male member 21 and the resin forming the female member 26 are bonded to each other at the surface layer portion of different resins, so-called pseudo-bonded state.
  • the male member 21 and the female member 26 are peeled off during use, they can be peeled off with an appropriate force.
  • the peel strength between the male member 21 and the female member 26 is set to 50 NZ 50 mm or less and 25 NZ 50 mm or more.
  • the strength is such that it can be opened with less force than the peel force after molding (same as conventional articulating tools, about 5-40NZ50mm) Since it is set, that is, the strength is different between the first peeling and the resealing, it is possible to determine whether it is the first peeling or the resealing. Therefore, antifalsification effect can be expected.
  • a peeling start portion may be provided on the boundary surface where the surfaces of the male member 21 and the female member 26 are in contact.
  • the width direction opening end side
  • the peeling start portion 40 may be formed on the boundary surface with which the surface of the film contacts.
  • the peeling start part 40 is configured by forming a V-groove 41 in one of the boundary surfaces where the surfaces of the male member 21 and the female member 26 are in contact with each other, here, the female occlusal part 28 of the female member 26.
  • FIG. 4 when viewed from the cross-section in the width direction of the bite 20, the width direction (opening end side) is perpendicular to the band-like direction of the bite 20, and the male member 21 and the female member 26
  • the peeling start portion 40 may be formed on the boundary surface with which the surface of the film contacts.
  • the peeling start part 40 is configured by forming a V-groove 41 in one of the boundary surfaces where the surfaces of the male member 21 and the female member 26 are in contact with each other, here, the
  • a rectangular groove 42 is formed on one of the boundary surfaces where the surfaces of the male member 21 and the female member 26 are in contact, for example, the female occlusal portion 28 of the female member 26. Moyo. If such a peeling start part 40 is provided, when force to peel off is applied to the films 11 and 12 constituting the bag body 10, these forces are concentrated on the peeling start part 40, so that peeling is easy by hand.
  • the V-groove 41 and the rectangular groove 42 constituting the peeling start portion 40 may have the same length as the banding direction (longitudinal direction) of the bite 20, but are intermittent in the banding direction (longitudinal direction) of the bite 20. May be provided.
  • the corner of the male occlusal portion 23 of the male member 21 is separated from the surface of the occlusal groove 28A of the female occlusal portion 28 due to shrinkage after molding or the like, sealing is performed to improve the openability.
  • the male occlusal portion 23 constituting the undercut with respect to the opening direction of the occlusion device may be formed so as to be separated from the surface of the female occlusal portion 28 within a range that does not impair the properties. That is, the force is 60% or more of the surface of the male member excluding the joint surface 22A of the male member 21 and is in contact with the surface of the female member excluding the joint surface 27A of the female member 26 substantially without any gap.
  • the second to fourth embodiments are shown in FIGS.
  • the shape of the male occlusion portion 23 of the male member 21 and the shape force of the female occlusion portion 28 of the female member 26 are different from the shape of the above embodiment.
  • the occlusal device 20B shown in FIG. 6 (the occlusal device of the second embodiment) is different in that the contour shape of the female occlusal portion 28 of the female member 26 is formed in a pentagonal shape.
  • the male occlusal portion 23 of the male member 21 has the same shape as in the above embodiment.
  • the occlusal device 20C shown in FIG. 7 (the occlusal device of the third embodiment) is different in that the contour shape of the female occlusal portion 28 of the female member 26 is formed in an arc shape gradually squeezing inwardly toward the tip. .
  • the male occlusal portion 23 of the male member 21 has the same shape as the above embodiment.
  • the male occlusal portion 23 of the male member 21 is provided in the occlusal device 20D shown in Fig. 8 (the occlusal device of the fourth embodiment).
  • the female occlusal portion 28 of the female member 26 is different from the above embodiment.
  • the male occlusal portion 23 of the male member 21 is formed in a circular arc shape that gradually tapers after the width dimension increases in a taper shape as the distance from the surface (surface 22B) of the belt-like base member 22 increases. It is formed in a shape having a hook portion 31 protruding toward the surface (surface 22B) of the belt-like substrate 22 on one side in the width direction (opening end side).
  • the female-type occlusal portion 28 of the female member 26 includes an occlusal groove 28A having a shape having a hook groove 32 that fits into the hook portion 31.
  • the male member 21 and the female member 26 are each composed of a single different grease, but the present invention is not limited to this.
  • the male occlusal portion 23 is composed of two or more layers, and the surface layer of the male occlusal portion 23 (the layer in contact with the female occlusal portion 28) is different from the fat that constitutes the female occlusal portion 28. It is possible to make the fat constituting the male occlusal portion 23 excluding the surface layer the same as the fat constituting the female occlusal portion 28.
  • the surface layer of the female occlusal portion 28 may be different from the cocoon that constitutes the male occlusal portion 23. Further, the surface layers of the male occlusal portion 23 and the female occlusal portion 28 may be made of different types of fat, and the portions other than the surface layers of both the occlusal portions 23 and 28 may be made of the same resin.
  • occlusion portions of the present invention are included in one occlusion device, or the case where the occlusion portion of the present invention and a conventional occlusion portion are included in one occlusion device are also included in the present invention.
  • the articulator manufactured in the present example is shown in FIG.
  • the materials of the male member 21, the female member 26, and the seal layers 24 and 29 used here are as follows.
  • Male member A propylene copolymer having an ethylene content of 1 wt%, a melting point of 154 ° C, a melting enthalpy of 72jZg, and MwZMn of 2.6.
  • Female member Low density polyethylene.
  • Sealing layer Meta mouth sen LL 80w with density 890kgZm 3 and MFR 4.
  • OgZlOmin A blend of t% and 20 wt% of propylene-butene 1 copolymer with a density of 890 kgZm 3 and an MFR of 3.2 gZl0min.
  • the occlusion tool is heat-sealed to the two unsealed parts, and the remaining three sides are heat-sealed. To obtain a bag with a bite.
  • the evaluation methods were manual peelability, peel strength measurement, manual resealability, and resealing strength measurement. Table 1 shows the evaluation results.
  • Peeling feeling A is recognized as peelable by hand (by pulling the bag by hand), and B is recognized as unpeelable by hand.
  • the present invention can be used for bags (packaging bags) for foods, pharmaceuticals, miscellaneous goods and the like.

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  • Manufacturing & Machinery (AREA)
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  • Bag Frames (AREA)

Abstract

　雄型咬合部２３を有する雄部材２１と、雄型咬合部２３と嵌合する雌型咬合部２８を有する雌部材２６とが、剥離可能かつ再嵌合可能な咬合具２０。雄部材２１と雌部材２６とは、異質の樹脂によって形成され、かつ、少なくとも雄型咬合部２３と雌型咬合部２８とが、実質的に隙間なく疑似接着または接触している。

Description

明 細 書
咬合具、これを用いた袋およびこれらの製造方法
技術分野
[0001] 本発明は、咬合具、これを用いた袋およびこれらの製造方法に関する。詳しくは、 雄型咬合部を有する雄部材と、雌型咬合部を有する雌部材とが、剥離可能かつ再嵌 合可能な咬合具、これを用いた袋およびこれらの製造方法に関する。
背景技術
[0002] 食品、医薬品、雑貨などの袋 (包装袋）には、開封後に再封止可能なチャックテー プが利用されている。
従来のチャックテープは、雄型咬合部を有する雄部材と、雄型咬合部に嵌合される 雌型咬合部を有する雌部材とから構成され、それぞれが別々に押出成形されたのち
、嵌合した状態で袋に取り付けられる。
そのため、従来のチャックテープ付き袋では、開封前における密封性が十分でない うえ、使用時にチャックテープがそれ以前に開封されていたり、あるいは、異物が混 入されて!ヽな 、かを確認するのが不可能であった。
[0003] そこで、密封性の向上、および、異物混入阻止のための手段として、袋の開口部を ヒートシールする構造が提案されている。しかし、この構造では、使用時に刃物で袋 の開口部をカットする手間が必要であったり、これらを簡単に引き裂くための手段を 別途設ける必要がある。
[0004] ところで、使用時に刃物などを用いることなく開封できるようにした袋として、特許文 献 1に開示されたジッパー付き包装袋が提案されて ヽる (特許文献 1参照)。
このジッパー付き包装袋は、雄型咬合部を有する雄部材と、雌型咬合部を有する 雌部材とを、互いに異なる合成樹脂で別々に成形し、これらを咬合させた状態で袋 の開口部内面にヒートシールすると同時に、雄部材と雄部材との対向面を比較的小 さなヒートシール強度で接合させた構造である。
[0005] 特許文献 1：特開 2004— 155458号公報
発明の開示 発明が解決しょうとする課題
[0006] 特許文献 1に開示されたジッパー付き包装袋では、雄部材と雄部材との対向面が 比較的小さなヒートシール強度で接合されているから、刃物などを用いることなく開封 できる。
しかし、製袋時には、雄部材と雌部材とを咬合した状態で、袋の開口部にヒートシ ールすると同時に、雄部材と雌部材との対向面を小さなヒートシール強度でヒートシ ールしなければならないから、つまり、同時に 2つの部位を異なる強度でヒートシール しなければならな!/、うえ、雄部材と雌部材との対向面にっ 、ては手で剥離できる程度 の強度でヒートシールしなければならな 、から、密封性が十分に保証できる袋が得に くい。
[0007] また、このジッパー付き包装袋では、雄型咬合部と雌型咬合部との間に隙間が生じ ているため、袋本体に雄部材と雌部材とをヒートシールする際、これらの雄型咬合部 と雌型咬合部とが変形してしま 、、再封止時の密封性にっ 、ても十分でな 、と 、う課 題ち考免られる。
し力も、雄型咬合部と雌型咬合部との咬合部に対して、雄部材と雌部材とのヒートシ ール部、つまり、開封部が別に設けられた構成であるから、これら部材の幅方向寸法 が大きくなり、小さな袋には不向きである。
[0008] 本発明の目的は、剥離性を維持しつつ、密封性を保証できる咬合具、その咬合具 を用いた袋を提供することにある。
本発明の他の目的は、上記目的に加え、改竄防止効果が図れる咬合具、袋の製 造方法を提供することにある。
課題を解決するための手段
[0009] 本発明の咬合具は、雄型咬合部を有する雄部材と、前記雄型咬合部と嵌合する雌 型咬合部を有する雌部材とが、剥離可能かつ再嵌合可能な咬合具であって、少なく とも前記雄型咬合部と前記雌型咬合部とが、実質的に隙間なく疑似接着または接触 していることを特徴とする。
[0010] ここで、「疑似接着」とは、雄型咬合部と雌型咬合部とを手で剥離できる程度の接着 をいう。例えば、本発明の咬合具を、袋本体の開封部に設けた場合において、もし、 雄型咬合部と雌型咬合部とが通常の「接着」をしていると、手で開封することが困難 になる。仮に、開封できたとしても、袋本体や咬合具の一部が破れたり、伸びなどの 変形を起こし、外観不良や再嵌合 ·再開封性が悪くなる虞がある。ちなみに、ここでい う「疑似接着」とは、後述する 50NZ50mm以下、 25NZ50mm以上のレベルの接 着が挙げられる力 流通時に咬合部が開く等の不具合が発生しなければ、 25NZ5 Omm未満のレベルでも問題な!/、。
また、本発明の咬合具においては、雄型咬合部と雌型咬合部とが全く接着してい ない場合でも、つまり、実質的に隙間なく接触している場合でも、両咬合部が開く方 向に対して、雄型咬合部と雌型咬合部とにアンダーカットができることで、流通時に 咬合部が開く等の不具合の発生を防げる場合がある。
[0011] 本発明の咬合具によれば、雄型咬合部と雌型咬合部とが、実質的に隙間なく疑似 接着または接触しているから、高い密封性を達成できるとともに、適度な剥離性、例 えば、手による剥離を実現できる。
また、雄型咬合部と雌型咬合部との間に実質的に隙間がないから、例えば、これら を袋本体に融着する際にも、これらの変形を防止できる。従って、高い密封性を保証 できる。
さらに、雄型咬合部と雌型咬合部とが開封部を兼ねているから、幅寸法を大きくし なくてもよぐ小さな袋にも適する。
[0012] 本発明の咬合具において、前記雄部材と前記雌部材とは、異質の榭脂によって形 成されて!/ヽることを特徴とする。
ここで、「異質の榭脂」とは、化学的に見て種類の違う榭脂を意味する。雄部材およ び雌部材の少なくとも一方を構成する素材が組成物や共重合体を含む場合は、前 記組成物や共重合体の 50質量％以上を占める成分 (主成分)が、雄部材および雌 部材の他方を構成する組成物や共重合体の主成分と、化学的に見て種類が異なる ことを意味する。
例えば、ポリプロピレンとポリエチレン、ポリプロピレンとエチレン 'プロピレン共重合 体 (プロピレンユニットは 50質量0 /0未満）は異質の榭脂である。ポリプロピレンと「ポリ プロピレンとポリエチレンの糸且成物（PPは 50質量0 /0以上）」は異質の榭脂ではな!/、。 [0013] この構成によれば、雄部材と雌部材とが異質の榭脂によって形成されているから、 雄型咬合部と雌型咬合部とを、実質的に隙間なく疑似接着した状態に構成にできる 。例えば、雄部材と雌部材とを、異質の榭脂によってかつ咬合状態で一体成形する と、異質の榭脂が互いに界面を保って密着した状態でそれぞれの形状に形成される 。一体成形後の状態では、雄部材を形成する榭脂と雌部材を形成する榭脂とが、異 なる榭脂同士の表層部分で接着、いわゆる疑似接着状態となるから、成形と同時に 疑似接着状態を得ることができる。
なお、一体的に成形する方法としては、共押出形成や逐次積層成形などによって 形成できる。
[0014] 本発明の咬合具において、前記雄部材は、接合面を有する帯状基体と、この帯状 基体の接合面とは反対側面に帯状方向に沿って一体的に突出形成された前記雄型 咬合部とを有し、前記雌部材は、接合面を有する帯状基体と、この帯状基体の接合 面とは反対側面に帯状方向に沿って一体的に形成された溝状の前記雌型咬合部と を有し、前記雄部材の接合面を除く雄部材表面の 60%以上が、前記雌部材の接合 面を除く雌部材表面と実質的に隙間なく接触していることが好ましい。
この構成によれば、雄部材の接合面を除く雄部材表面の 60%以上が、雌部材の接 合面を除く雌部材表面と実質的に隙間なく接触しているから、高い密封性を達成で きる。雄部材の接合面を除く雄部材表面の接触面積については、 60%以上であれ ばよいが、好ましくは 70%以上、より好ましくは 90%以上がよい。
[0015] 本発明の咬合具において、前記雄型咬合部の断面形状と前記雌型咬合部の溝断 面形状とが同一断面形状に形成されて 、ることが好ま 、。
この構成によれば、互いに咬合しあう雄型咬合部の断面形状と雌型咬合部の溝断 面形状とが同一断面形状に形成されているから、雄型咬合部と雌型咬合部とが隙間 なく接した状態の咬合状態が得られる。従って、これらの間には隙間が生じないため 、より高い密封性を達成できる。
[0016] 本発明の咬合具において、前記雄部材の帯状基体の接合面とは反対側面には、 前記雌部材の雌型咬合部の少なくとも一部が接して 、ることが好まし 、。
この構成によれば、雄部材の帯状基体の接合面とは反対側面には、雌部材の雌型 咬合部の少なくとも一部が接しているから、雄型咬合部と雌型咬合部との接触面積 に、雄部材の帯状基体と雌部材の雌型咬合部との接触面積が加わるため、両者の 接触面積を更に増大させることができ、より高い密封性を達成できる。
ここで、雌部材の雌型咬合部が接する部分は、雄部材の雄型咬合部近傍が好まし く、雄型咬合部を挟んだ両側に接して ヽればより好まし 、。
[0017] 本発明の咬合具において、前記雄部材と前記雌部材との表面が接する境界面に 剥離開始部が形成されて 、ることが好ま 、。
この構成によれば、雄部材と雌部材とを剥離する際、これらを離れる方向に力をカロ えると、剥離開始部に応力が集中するので、剥離しやすい。
[0018] 本発明の咬合具において、前記剥離開始部は、前記雄部材と前記雌部材との表 面が接する境界面の一方に形成された溝であることが好ましい。
剥離開始部の溝は、咬合具の帯状方向 (長手方向）の長さと同じでもよいが、咬合 具の帯状方向（長手方向）に間欠的に設けられていてもよい。溝の形状については、 V溝や矩形溝などを例示することができるが、形状は任意である。
この構成によれば、簡単な構成で剥離開始部を形成することができる。雄部材ゃ雌 部材の成形時に一緒に剥離開始部を形成することもできる。
[0019] 本発明の咬合具において、前記雄部材と雌部材との剥離強度力 50N/50mm 以下、 25NZ50mm以上であることが好ましい。
このような構成であれば、手で剥離しやすい。剥離強度が 50NZ50mmを超えると 、手による剥離が困難になるため、望ましくは 35NZ50mm以下がよい。逆に低すぎ ると、流通時に誤って開封する恐れがあるため、 25NZ50mm以上であることが望ま しい。
[0020] 本発明の咬合具において、前記雄部材および雌部材のいずれか一方力 エチレン を主成分とした重合体によって形成され、他方がプロピレンを主成分とした重合体に よって形成されて 、ることが好まし 、。
この構成によれば、柔軟性に優れたエチレンを主成分とした重合体と、柔軟性が低 V、プロピレンを主成分とした重合体とを用いたので、雄部材と雌部材とを剥離しやす ぐかつ、密封性も高めることができる。とくに、雄部材と雌部材とを、剥離、再嵌合す るためには、変形が大き！ヽ雌部材を柔軟性に優れたエチレンを主成分とした重合体 で形成し、雄部材をプロピレンを主成分とした重合体で形成するのが望まし 、。
[0021] 本発明の咬合具において、前記雄部材および雌部材のそれぞれの接合面側には 、シール層が形成されていることが好ましい。
この構成によれば、雄部材および雌部材がシール層を備えているから、異質の榭 脂からなる雄部材および雌部材であっても、片方の部材と同じィ匕学種の素材力もな る袋本体に融着しゃすい。
[0022] 本発明の袋は、上述したいずれかに記載の咬合具を、袋本体の開口部に備えてい ることを特徴とする。
この構成によれば、上述した効果が期待できる袋が得られる。
[0023] 本発明の咬合具の製造方法は、雄型咬合部を有する雄部材と、前記雄型咬合部と 嵌合する雌型咬合部を有する雌部材とを、異質の榭脂によって、かつ、咬合状態で 一体成形することを特徴とする。
本発明の袋の製造方法は、雄型咬合部を有する雄部材と、前記雄型咬合部と嵌合 する雌型咬合部を有する雌部材とを、異質の榭脂によって、かつ、咬合状態で一体 成形して咬合具を得る咬合具成形工程と、この咬合具成形工程によって成形された 咬合具を咬合状態のまま袋本体の開口部に溶着または接着して袋を形成する製袋 工程とを備えることを特徴とする。
ここで、異質の榭脂としては、相溶性が低い樹脂が選択されるのがよい。
[0024] これらの構成によれば、雄型咬合部を有する雄部材と、雄型咬合部と嵌合する雌 型咬合部を有する雌部材とが、異質の榭脂によってかつ咬合状態で一体成形される と、異質の榭脂が互いに界面を保って密着した状態でそれぞれの形状に形成される 。一体成形後の状態では、雄部材を形成する榭脂と雌部材を形成する榭脂とが、異 なる榭脂同士の表層部分で接着、いわゆる疑似接着した状態であるから、高い密封 性が得られ、使用時に、雄部材と雌部材とを剥離すると、適度な力で剥離できる。 雄部材と雌部材とを再嵌合させたのち、再開封すると、成形後に剥離する力より小 さい力で開封できるような強度設定にしておけば、 2回目以降の開封時の強度が小さ くなるため、最初の剥離時である力、再開封時であるかを判別できる。従って、改竄 防止効果が期待できる。
図面の簡単な説明
[0025] [図 1]本発明の第 1実施形態に力かる袋を示す正面図。
[図 2]同上実施形態の II II線断面図。
[図 3]同上実施形態の袋を開封した状態の断面図。
[図 4]同上実施形態の変形例 1を示す断面図。
[図 5]同上実施形態の変形例 2を示す断面図。
[図 6]本発明の第 2実施形態を示す断面図。
[図 7]本発明の第 3実施形態を示す断面図。
[図 8]本発明の第 4実施形態を示す断面図。
符号の説明
[0026] 10· ··袋本体
20, 20B〜20D…咬合具
21· ··雄部材
22· ··帯状基体
23· "雄型咬合部
24· "シール層
26· ··雌部材
27· ··帯状基体
28· "雄型咬合部
29· "シール層
40· ··剥離開始部
41· ••V溝 (剥離開始部）
42· 矩形溝 (剥離開始部)
発明を実施するための最良の形態
以下、本発明の実施形態を図面に基づいて説明する。
(第 1実施形態）
本発明の第 1実施形態を図 1〜図 3に示す。図 1は第 1実施形態の袋の正面図、図 2は図 1の II-II線断面図、図 3は袋の開封状態の断面図である。
第 1実施形態の袋は、袋本体 10と、この袋本体 10の開口部（開封部）に取り付けら れた咬合具 20とを備えて 、る。
[0028] 袋本体 10は、表裏 2枚の平面矩形形状のフィルム 11, 12の周縁 (各辺）を貼り合わ せて（ヒートシールして）構成されて!、る。
フィルム 11, 12は、直鎖状低密度ポリエチレン (LLDPE)製の単層構造のフィルム で、例えば、キャスティング法、溶融押出法、カレンダ法など公知の方法で製造される 。なお、本実施形態では、フィルム 11, 12を単層構造とした力 延伸ナイロン（ΟΝΥ )、延伸ポリプロピレン（ΟΡΡ)、延伸ポリエチレンテレフタレート（ΟΡΕΤ)の外層と、 直鎖状低密度ポリエチレン (LLDPE)、キャストポリプロピレン (CPP)などのシーラン ト層とのラミネート品であってもよい。
[0029] 咬合具 20は、雄部材 21と、雌部材 26とから構成され、これらが咬合状態で一体形 成されるとともに、剥離可能かつ再嵌合可能に構成されている。
雄部材 21は、接合面 22Αを有する帯状基体 22と、この帯状基体 22の接合面 22Α とは反対側の面 22Βに帯状方向に沿って一体的に突出形成された雄型咬合部 23と 、帯状基体 22の接合面 22Αに設けられたシール層 24とを備えている。
雄型咬合部 23は、帯状基体 22の幅方向中央に帯状基体 22の表面（面 22Β)から 離れるに従って、幅寸法がテーパ状に広がったのち、テーパ状に狭まる形状、つまり 、断面五角形形状に形成されている。シール層 24は、一定の厚みで、かつ、帯状基 体 22の幅寸法と略同じ幅寸法に形成されて 、る。
[0030] 雌部材 26は、接合面 27Αを有する帯状基体 27と、この帯状基体 27の接合面 27Α とは反対側の面に帯状方向に沿って一体的に形成された雌型咬合部 28と、帯状基 体 27の接合面 27Αに設けられたシール層 29と力も構成されている。
雌型咬合部 28は、帯状基体 27の幅寸法と略同じ幅寸法の断面矩形状に形成され 、先端側面に雄型咬合部 23の断面形状と同一断面形状 (断面五角形形状)の咬合 溝 28Αを有する。シール層 29は、一定の厚みで、かつ、帯状基体 27の幅寸法と略 同じ幅寸法に形成されて！ヽる。
つまり、雄部材 21と雌部材 26とは、雄型咬合部 23と雌型咬合部 28とが隙間なく接 しているとともに、雄部材 21の帯状基体 22の接合面 22Aとは反対側の面 22Bと雌部 材 26の雌型咬合部 28の先端面とが隙間なく接した形状に構成されている。言い換 えると、雄部材 21の接合面 22Aを除く雄部材表面の 90%以上が、雌部材 26の接合 面 27Aを除く雌部材表面と実質的に隙間なく接触している。従って、雄部材 21と雌 部材 26とが咬合した状態では、内部に隙間がない断面矩形形状に構成される。
[0031] ここで、雄部材 21を構成する帯状基体 22および雄型咬合部 23と、雌部材 26を構 成する帯状基体 27および雌型咬合部 28とは、異質の榭脂、具体的には、エチレン を主成分とした重合体と、プロピレンを主成分とした重合体によって、一体的に成形 されている。本実施形態では、雄部材 21および雌部材 26のうち、雌部材 26がェチレ ンを主成分とした重合体によって成形され、雄部材 21がプロピレンを主成分とした重 合体によって成形されて！、る。
エチレンを主成分とする重合体としては、低密度ポリエチレン、直鎖状低密度ポリエ チレン (LLDPE)などが挙げられる。プロピレンを主成分とした重合体としては、ポリ プロピレンを主成分とするエチレンの共重合体、ホモのポリプロピレン、ポリオレフイン 系熱可塑性エラストマ一 (TPO)などが望まし ヽ。
[0032] シール層 24, 29は、異質の榭脂によって形成された雄部材 21および雌部材 26を 同一の袋本体 10に融着するために設けられて 、る。
エチレンを主成分とした重合体と、プロピレンを主成分とした重合体とを用いて、雌 部材 26および雄部材 21を形成した場合、シール層 24, 29は、メタ口セン LLとするこ とが望ましい。
とくに、密度が 905kgZm3以下、 MFRが 5gZlOmin以下であるメタ口セン LLを 5 0〜： LOOwt%含み、残りの 50〜Owt%は、密度が 905kgZm3以下、 MFRが 5gZl Ominを超えるメタ口セン LL、または、プロピレンを主成分とするブテン一 1との共重合 体から選ばれる。
[0033] 次に、本実施形態の袋の製造方法について説明する。
袋の製造にあたっては、まず、咬合具成形工程で咬合具 20を得たのち、製袋工程 において袋を製造する。
咬合具成形工程では、雄部材 21と、雌部材 26とを、異質の榭脂によってかつ咬合 状態で一体成形して咬合具 20を得る。
具体的には、プロピレンを主成分とした共重合体 (雄部材 21の帯状基体 22および 雄型咬合部 23を形成する榭脂）と、エチレンを主成分とした共重合体 (雌部材 26の 帯状基体 27および雌型咬合部 28を形成する榭脂）と、メタ口セン LL (シール層 24, 29を形成する榭脂)を、 3台の押出機を用いて共押出成形し、雄部材 21と雌部材 26 とが咬合状態の咬合具 20を得る。
[0034] 製袋工程では、咬合具成形工程によって成形された咬合具 20を咬合状態のまま 袋本体 10の開口部に熱融着または接着して袋を形成する。
具体的には、直鎖状低密度ポリエチレン (LLDPE)製の単層構造のフィルム 11, 1 2の開口部（開封部）に咬合具成形工程によって成形された咬合具 20を咬合状態の まま熱融着するとともに、他の 3辺を熱融着して袋を形成する。
[0035] このようにして得られた袋では、袋本体 10の開口部に熱融着または接着された雄 部材 21と雌部材 26とが、咬合状態で一体成形されている構成であるから、一体成形 後の状態では、雄部材 21を形成する榭脂と雌部材 26を形成する榭脂とが、異なる 榭脂同士の表層部分で接着、いわゆる疑似接着した状態であるから、高い密封性が 得られる一方、使用時に、雄部材 21と雌部材 26とを剥離すると、適度な力で剥離で きる。ここでは、雄部材 21と雌部材 26との剥離強度力 50NZ50mm以下、 25NZ 50mm以上になるように設定されている。
雄部材 21と雌部材 26とを再嵌合させたのち、再開封すると、成形後に剥離する力 より小さい力で開封できるような強度 (従来の咬合具と同程度、 5〜40NZ50mm程 度）に設定されているため、つまり、最初の剥離時と、再開封時とで、強度が異なるた め、最初の剥離時であるか、再開封時であるかを判別できる。従って、改竄防止効果 が期待できる。
[0036] (変形例）
前記実施形態において、雄部材 21と雌部材 26との表面が接する境界面に剥離開 始部を設けるようにしてもよい。例えば、図 4に示すように、咬合具 20の幅方向の断 面から見ると、咬合具 20の帯状方向と直交する幅方向（開封端側)であって、雄部材 21と雌部材 26との表面が接する境界面に剥離開始部 40を形成してもよい。 剥離開始部 40は、雄部材 21と雌部材 26との表面が接する境界面の一方、ここで は、雌部材 26の雌型咬合部 28に V溝 41を形成することによって構成されている。あ るいは、図 5に示すように、雄部材 21と雌部材 26との表面が接する境界面の一方、 例えば、雌部材 26の雌型咬合部 28に矩形溝 42を形成した構成であってもよ 、。 このような剥離開始部 40を設ければ、袋本体 10を構成するフィルム 11, 12に剥が す力を加えると、これらの力が剥離開始部 40に集中するので、手で剥離しやすい。 なお、剥離開始部 40を構成する V溝 41や矩形溝 42は、咬合具 20の帯状方向 (長 手方向）の長さと同じでもよいが、咬合具 20の帯状方向 (長手方向）に間欠的に設け られていてもよい。
[0037] また、雄部材 21の雄型咬合部 23の角部が成形後の収縮などで、雌型咬合部 28の 咬合溝 28Aの表面から離れる場合や、開封性をよくするために、密封性を損なわな い範囲で、咬合具の開封方向に対しアンダーカットを構成する雄型咬合部 23の部分 を、雌型咬合部 28の表面カゝら離れるように形成してもよい。つまり、雄部材 21の接合 面 22Aを除く雄部材表面の 60%以上力 雌部材 26の接合面 27Aを除く雌部材表 面と実質的に隙間なく接触していることを条件に、成形後の収縮による非接触部や、 咬合具の開封方向に対してアンダーカットを構成する雄型咬合部 23の部分を、雌型 咬合部 28の表面力も離れるようにした非接触部があってもよ!、。
[0038] (第 2実施形態〜第 4実施形態）
第 2実施形態〜第 4実施形態を図 6〜図 8に示す。これらの実施形態では、雄部材 21の雄型咬合部 23の形状や雌部材 26の雌型咬合部 28の形状力 前記実施形態 の形状と異なる。
図 6に示す咬合具 20B (第 2実施形態の咬合具)では、雌部材 26の雌型咬合部 28 の輪郭形状が五角形形状に形成されている点が異なる。なお、雄部材 21の雄型咬 合部 23は前記実施形態を同じ形状である。
図 7に示す咬合具 20C (第 3実施形態の咬合具)では、雌部材 26の雌型咬合部 28 の輪郭形状が先端に向かうに従って次第に内側へつぼむ円弧状に形成されている 点が異なる。なお、雄部材 21の雄型咬合部 23は前記実施形態を同じ形状である。
[0039] 図 8に示す咬合具 20D (第 4実施形態の咬合具)では、雄部材 21の雄型咬合部 23 および雌部材 26の雌型咬合部 28が、前記実施形態と異なる。
この例では、雄部材 21の雄型咬合部 23は、帯状基体 22の表面（面 22B)から離れ るに従って、幅寸法がテーパ状に広がったのち、次第につぼまる円弧状に形成され 、かつ、幅方向片側（開封端側）に帯状基体 22の表面 (面 22B)に向かって突出する フック部 31を備える形状に形成されている。雌部材 26の雌型咬合部 28は、このフッ ク部 31に嵌合するフック溝 32を有する形状の咬合溝 28Aを備えている。
このような構成であれば、フック部 31とフック溝 32とが係合しているため、より高い密 封性を確保できる。
[0040] また、前記実施形態では、雄部材 21と雌部材 26とを、それぞれ単一の異なる榭脂 で構成したが、これに限られない。
例えば、雄型咬合部 23を 2層以上で構成し、その雄型咬合部 23の表面層（雌型咬 合部 28と接する層）を、雌型咬合部 28を構成する榭脂と異質の榭脂から構成し、表 面層を除く雄型咬合部 23を構成する榭脂を雌型咬合部 28を構成する榭脂と同じと してちよい。
これとは逆に、雌型咬合部 28の表面層が、雄型咬合部 23を構成する榭脂と異質 の榭脂であってもよい。また、雄型咬合部 23および雌型咬合部 28の表面層同士が 異質の榭脂から構成され、両咬合部 23, 28の表面層を除く部分は同じ樹脂から構 成されていてもよい。
また、一つの咬合具に、本発明の咬合部を 2以上含む場合や、一つの咬合具に、 本発明の咬合部と従来の咬合部とを含む場合も、本発明に含まれる。
実施例 1
[0041] <咬合具の製造 >
本実施例で製造した咬合具を図 5に示す。ここで使用した雄部材 21、雌部材 26、 シール層 24, 29の材料は次の通りである。
雄部材 ：エチレン含有量 lwt%、融点が 154°C、融解ェンタルピーが 72jZg、 M wZMnが 2. 6のプロピレン共重合体。
雌部材 ：低密度ポリエチレン。
シール層：密度が 890kgZm3、 MFRが 4. OgZlOminであるメタ口セン LLを 80w t%と、密度が 890kgZm3、 MFRが 3. 2gZl0minであるプロピレンーブテン 1共 重合体 20wt%とのブレンド品。
これら 3種の榭脂を 3台の押出機を用いて、共押出成形し、雄部材と雌部材とが咬 合状態の咬合具を得た。
[0042] ぐ袋の製造 >
二軸延伸ポリエチレンテレフタレートフィルム（12 μ m)と直鎖状低密度ポリエチレン (50 m)とのラミネートフィルム 2枚の開封部に咬合具を熱融着するとともに、残りの 3辺を熱融着して咬合具付袋を得た。
[0043] <評価>
評価方法は、手による剥離性、剥離強度測定、手による再封止の可否、再開封強 度測定を実施した。評価結果を表 1に示す。
[0044] [表 1]
Figure imgf000015_0001
[0045] 剥離感：手で剥離可能 (袋を手で引っ張って）と認められるものは A、手で剥離不可 能と認められるものは B
剥離強度：引張試験機にてクロスヘッドスピード 300mmZmin
再嵌合感：再嵌合可能と認められるものは A、再嵌合不可と認められるものは B 再開封強度：弓 I張試験機にてクロスヘッドスピード 300mmZmin
産業上の利用可能性
[0046] 本発明は、食品、医薬品、雑貨などの袋 (包装袋)などに利用することができる。

Claims

請求の範囲
[1] 雄型咬合部を有する雄部材と、前記雄型咬合部と嵌合する雌型咬合部を有する雌 部材とが、剥離可能かつ再嵌合可能な咬合具であって、
少なくとも前記雄型咬合部と前記雌型咬合部とが、実質的に隙間なく疑似接着また は接触して 、ることを特徴とする咬合具。
[2] 請求項 1に記載の咬合具において、
前記雄部材と前記雌部材とは、異質の榭脂によって形成されていることを特徴とす る咬合具。
[3] 請求項 1または請求項 2に記載の咬合具において、
前記雄部材は、接合面を有する帯状基体と、この帯状基体の接合面とは反対側面 に帯状方向に沿って一体的に突出形成された前記雄型咬合部とを有し、 前記雌部材は、接合面を有する帯状基体と、この帯状基体の接合面とは反対側面 に帯状方向に沿って一体的に形成された溝状の前記雌型咬合部とを有し、 前記雄部材の接合面を除く雄部材表面の 60%以上が、前記雌部材の接合面を除 く雌部材表面と実質的に隙間なく接触していることを特徴とする咬合具。
[4] 請求項 1〜請求項 3の 、ずれかに記載の咬合具にお 、て、
前記雄型咬合部の断面形状と前記雌型咬合部の溝断面形状とが同一断面形状に 形成されて 、ることを特徴とする咬合具。
[5] 請求項 3に記載の咬合具において、
前記雄部材の帯状基体の接合面とは反対側面には、前記雌部材の雌型咬合部の 少なくとも一部が接していることを特徴とする咬合具。
[6] 請求項 1〜請求項 5の 、ずれかに記載の咬合具にお 、て、
前記雄部材と前記雌部材との表面が接する境界面には剥離開始部が形成されて V、ることを特徴とする咬合具。
[7] 請求項 6に記載の咬合具において、
前記剥離開始部は、前記雄部材と前記雌部材との表面が接する境界面の一方に 形成された溝であることを特徴とする咬合具。
[8] 請求項 1〜7の 、ずれかに記載の咬合具にお ヽて、 前記雄部材と雌部材との剥離強度力 50NZ50mm以下、 25NZ50mm以上で あることを特徴とする咬合具。
請求項 1〜8の 、ずれかに記載の咬合具にお ヽて、
前記雄部材および雌部材の 、ずれか一方が、エチレンを主成分とした重合体によ つて形成され、他方がプロピレンを主成分とした重合体によって形成されて ヽることを 特徴とする咬合具。
請求項 1〜請求項 9の 、ずれかに記載の咬合具にお 、て、
前記雄部材および雌部材のそれぞれの接合面側には、シール層が形成されて ヽ ることを特徴とする咬合具。
請求項 1〜請求項 10のいずれかに記載の咬合具を、袋本体の開口部に備えてい ることを特徴とする袋。
雄型咬合部を有する雄部材と、前記雄型咬合部と嵌合する雌型咬合部を有する雌 部材とを、異質の榭脂によって、かつ、咬合状態で一体成形することを特徴とする咬 合具の製造方法。
雄型咬合部を有する雄部材と、前記雄型咬合部と嵌合する雌型咬合部を有する雌 部材とを、異質の榭脂によって、かつ、咬合状態で一体成形して咬合具を得る咬合 具成形工程と、
この咬合具成形工程によって成形された咬合具を咬合状態のまま袋本体の開口部 に融着または接着して袋を形成する製袋工程とを備えることを特徴とする袋の製造 方法。
PCT/JP2006/322073 2005-11-08 2006-11-06 咬合具、これを用いた袋およびこれらの製造方法 WO2007055161A1 (ja)

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US12/092,870 US8789247B2 (en) 2005-11-08 2006-11-06 Interlock tool, bag making use thereof and process for producing them
EP06822987A EP1946668B8 (en) 2005-11-08 2006-11-06 Interlock tool, bag making use thereof and process for producing them
PL06822987T PL1946668T3 (pl) 2005-11-08 2006-11-06 Narzędzie sczepiające, wykorzystująca je torebka i sposób ich wytwarzania
KR1020087013646A KR101296550B1 (ko) 2005-11-08 2006-11-06 교합구, 이것을 사용한 봉투 및 이들 제조 방법

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JP2005323190A JP5087219B2 (ja) 2005-11-08 2005-11-08 咬合具、これを用いた袋およびこれらの製造方法

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EP1946668A4 (en) 2009-12-02
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US8789247B2 (en) 2014-07-29
EP1946668B1 (en) 2012-09-05
CN101304676A (zh) 2008-11-12
KR20080066083A (ko) 2008-07-15
CN100566619C (zh) 2009-12-09
KR101296550B1 (ko) 2013-08-13
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EP1946668A1 (en) 2008-07-23
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EP1946668B8 (en) 2012-11-14

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