EP0731034B1 - Snap zipper and bag with the same - Google Patents

Snap zipper and bag with the same Download PDF

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Publication number
EP0731034B1
EP0731034B1 EP96106556A EP96106556A EP0731034B1 EP 0731034 B1 EP0731034 B1 EP 0731034B1 EP 96106556 A EP96106556 A EP 96106556A EP 96106556 A EP96106556 A EP 96106556A EP 0731034 B1 EP0731034 B1 EP 0731034B1
Authority
EP
European Patent Office
Prior art keywords
snap zipper
snap
resin
zipper
bag
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP96106556A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0731034A2 (en
EP0731034A3 (enrdf_load_stackoverflow
Inventor
Toyokazu Takubo
Ken-Ichi Tanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Idemitsu Petrochemical Co Ltd
Original Assignee
Idemitsu Petrochemical 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
Priority claimed from JP29862592A external-priority patent/JPH06144451A/ja
Application filed by Idemitsu Petrochemical Co Ltd filed Critical Idemitsu Petrochemical Co Ltd
Publication of EP0731034A2 publication Critical patent/EP0731034A2/en
Publication of EP0731034A3 publication Critical patent/EP0731034A3/en
Application granted granted Critical
Publication of EP0731034B1 publication Critical patent/EP0731034B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45C—PURSES; LUGGAGE; HAND CARRIED BAGS
    • A45C3/00—Flexible luggage; Handbags
    • A45C3/04—Shopping bags; Shopping nets
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
    • A44B19/16—Interlocking member having uniform section throughout the length of the stringer

Definitions

  • This invention relates to a snap zipper and a bag with snap zipper, which can be utilized in the fields of foods, medical products and grocery.
  • Bags with zipper are used in many fields such as those of foods, medical products and grocery.
  • a strip-like snap zipper comprising a male and a female member is provided on the bag in a sealing portion thereof.
  • various methods of producing bags with snap zipper have been proposed.
  • the bag with snap zipper which is produced as a one-piece molding from the outset, takes space due to the shape of the snap zipper. Its storage and handling therefore, are rather inconvenient. In addition, restrictions are imposed on the structure of the base film. Accordingly, the latter method (2) which is free from the above drawbacks is recently becoming a general method.
  • EP-A-0371402 discloses a fastener, and a bag to which the fastener is welded, in which at least the portion of the fastener to be welded to the bag body is mainly made of ethylene vinyl acetate copolymer resin containing 1 to 9% vinyl acetate and having a melt index of 0.5 to 6.0 g/10 minutes.
  • the snap zipper is usually made of low density polyethylene (LDPE) or polypropylene (PP).
  • LDPE low density polyethylene
  • PP polypropylene
  • a sealant layer which forms the innermost layer of the bag body, and to which the snap zipper is fused, is applied to a base film of the same material.
  • LDPE low density polyethylene
  • PP polypropylene
  • the snap zipper is made of the same LDPE.
  • the snap zipper With a sealant layer of the same material as the snap zipper, the snap zipper can be sealed to the sealant layer without any trouble.
  • polyester resins are excellent in their heat resistance and order retention property, and thus they are used suitably as the material of the sealant layer of the bag body.
  • a snap zipper in which at least its portion for fusion is mainly composed of polybutylene terephthalate (PBT) or polyester type elastomer, having a bending modulus of elasticity of 10,000 kg,cm 2 or below.
  • PBT polybutylene terephthalate
  • polyester type elastomer having a bending modulus of elasticity of 10,000 kg,cm 2 or below.
  • the portion for fusion need be mainly composed of the PBT resin or polyester type elastomer.
  • the entire snap zipper including the portion for fusion may be mainly composed of the PBT resin or polyester type elastomer.
  • the bending modulus of elasticity of the resin of the portion for fusion is above 10,000 kg/cm 2 , adequate flexibility necessary for the snap zipper can not be obtained.
  • the lower the bending modulus of elasticity of the resin the lower is the melting points of the PBT resin and polyester type elastomer, and correspondingly the temperature of fusion to the sealant layer is the lower.
  • the snap zipper may, if necessary, contain suitable additives (such as coloring agent, stabilizing agent, anti-oxidization agent, slip agent, anti-static agent, anti-blocking agent, etc.). Slip agent are added usually.
  • a bag with snap zipper in which the snap zipper according to the first embodiment of the invention noted above is fused via the portion for fusion to a bag body.
  • the snap zipper of the invention permits use of the polyester type resin for the bag body sealant layer, to which the snap zipper is fused.
  • the snap zipper can be fused to the sealant layer without trouble. Besides, a sufficient strength of fusion between the bag body and the snap zipper is obtainable.
  • the polyester type resin as the material of the sealant layer.
  • polyester type resin examples include polyester (PET), polybutylene terephthalate (PET) resin, polyester type elastomer, polycarbonate, etc. It is possible to use a blend resin composed of polyester and polyolefin type resins.
  • polyester type resins are excellent in heat resistance, odor retention and low drug absorption property, with the possibility of using this type of resins as the material of the sealant layer the following effects are obtainable.
  • the material of the bag body in order to provide the odor retention and low drug absorption property.
  • polyester type resins in lieu of aluminum.
  • the bag may be made transparent by dispensing with aluminum layer. By so doing, it is possible to obtain a bag, through which the content can be seen while it provides the odor retention and low drug absorption properties.
  • the bag which can be produced by using such polyester type resin, is suitable for fields, in which heat resistance such as boil and retort is required.
  • the material for the sealant layer may be used any resin other than the polyester type resins as well so long as it can be fused to the snap zipper.
  • resin examples include LDPE, L-LDPE, PP, ethylene-vinyl acetate copolymer (EVA), ethylene-methacrylic acid copolymer (EMAA), ionomer (IO), etc.
  • nylon, PET, PP, cellophane, paper, etc. may be used as desired depending on desired characteristics.
  • the snap zipper according to the invention may be fabricated by any method. Usually, it is produced using extrusion dies having sectional profiles corresponding to its shape for molding it and then cooling the resultant molding in water.
  • the shape of the snap zipper according to the invention is not limited to what comprises a male and a female member capable of chucking together, and any well-known shape may be adopted so long as it is capable of sealing and unsealing.
  • the snap zipper may be fused to the bag body with well-known means such as heat, high frequency waves, ultrasonic waves, etc.
  • the bending modulus of elasticity of the PBT resin was 3,500 kg/cm 2 .
  • the engagement performance was evaluated as such: It was A (Excellent), i.e., satisfactory, if the male and female members 12 and 13 could be readily engaged. It was B (Good), i.e., common, if the two members could be engaged. It was F (Fail), i.e., defective, if the two members could be difficulty engaged or could not be engaged.
  • the flexibility was evaluated with respect to the state of take-up of the male and female members 12 and 13.
  • the evaluation standards were as follows.
  • the flexibility was A (Excellent), i.e., satisfactory, if the rolls of the taken-up male and female members 12 and 13 were satisfactory in appearance. It was B (Good), i.e., common, if the rolls were rather satisfactory in appearance. It was F (Fail), i.e., defective, if the rolls were unsatisfactory in appearance.
  • the thermal fusion performance was evaluated as follows. It was A, i.e., satisfactory, if a strength of 300 g or above with a width of 15 mm was measured by using the thermal gradient tester noted above. It was F, i.e., defective, if the strength in the same measurement was below 300 g.
  • the stem portions 14 and 17 of the male and female members 12 and 13 were thermally fused to base films 23 (70 ⁇ m thick) of the bag body 22, and then three sides of the films were heat sealed, thus obtaining the bag 24 with snap zipper in these examples.
  • the base film 23 had a five-layer structure having four inner layers, i.e., a polyester type resin layer (15 ⁇ m), a PET layer (26 ⁇ m). a polyester type resin layer (12 ⁇ m) and an adhesive layer (5 ⁇ m) and an outer layer, i.e., a PET layer (12 ⁇ m).
  • the innermost polyester type resin layer was the sealant layer of the bag body 22, to which the male or female member 12 or 13 was fused.
  • the snap zippers 11 in Examples 1 to 3 are made of PBT resin having the bending modulus of elasticity of more than 10000 kg/cm 2 , they are satisfactorily flexible, excellent in the performance of sealing and unsealing of the male and female members 12 and 13 (engagement performance) and satisfactory in appearance.
  • Example 4 as polyester type elastomer was used "PELPRENE” (a trade name by Toyo Boseki Co., Ltd.), and in Examples 5 to 8 as polyester type elastomer was used “HYTREL” (a trade name by DUPONT-TORAY CO., Ltd.).
  • PELPRENE a trade name by Toyo Boseki Co., Ltd.
  • HYTREL a trade name by DUPONT-TORAY CO., Ltd.
  • the bending modulus of elasticity and the melting point of the polyester type elastomer are shown in Table 2.
  • Example 2 the flexibility and engagement performance were evaluated as Example 1. Further, the thermal fusion temperature was measured. The results are shown in Table 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP96106556A 1992-11-09 1993-11-08 Snap zipper and bag with the same Expired - Lifetime EP0731034B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP29862592A JPH06144451A (ja) 1992-11-09 1992-11-09 咬合具及び咬合具付き包装袋
JP298625/92 1992-11-09
JP298624/92 1992-11-09
JP29862492 1992-11-09
EP93308892A EP0597650B1 (en) 1992-11-09 1993-11-08 Bag with a snap zipper

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP93308892.4 Division 1993-11-08
EP93308892A Division EP0597650B1 (en) 1992-11-09 1993-11-08 Bag with a snap zipper

Publications (3)

Publication Number Publication Date
EP0731034A2 EP0731034A2 (en) 1996-09-11
EP0731034A3 EP0731034A3 (enrdf_load_stackoverflow) 1996-09-18
EP0731034B1 true EP0731034B1 (en) 1999-05-06

Family

ID=26561598

Family Applications (4)

Application Number Title Priority Date Filing Date
EP96106556A Expired - Lifetime EP0731034B1 (en) 1992-11-09 1993-11-08 Snap zipper and bag with the same
EP93308892A Expired - Lifetime EP0597650B1 (en) 1992-11-09 1993-11-08 Bag with a snap zipper
EP96106557A Withdrawn EP0731035A2 (en) 1992-11-09 1993-11-08 Snap zipper and bag with the same
EP96106533A Expired - Lifetime EP0731033B1 (en) 1992-11-09 1993-11-08 Snap zipper and bag with the same

Family Applications After (3)

Application Number Title Priority Date Filing Date
EP93308892A Expired - Lifetime EP0597650B1 (en) 1992-11-09 1993-11-08 Bag with a snap zipper
EP96106557A Withdrawn EP0731035A2 (en) 1992-11-09 1993-11-08 Snap zipper and bag with the same
EP96106533A Expired - Lifetime EP0731033B1 (en) 1992-11-09 1993-11-08 Snap zipper and bag with the same

Country Status (5)

Country Link
EP (4) EP0731034B1 (enrdf_load_stackoverflow)
KR (1) KR100296391B1 (enrdf_load_stackoverflow)
AU (1) AU679004B2 (enrdf_load_stackoverflow)
DE (3) DE69324828T2 (enrdf_load_stackoverflow)
ES (1) ES2111719T3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6719678B1 (en) 2000-02-28 2004-04-13 C.L.P Industries Ltd. Recloseable retort pouch

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3650465B2 (ja) * 1996-04-12 2005-05-18 出光興産株式会社 咬合具及び咬合具付き包装袋
JPH10107A (ja) * 1996-06-17 1998-01-06 Idemitsu Petrochem Co Ltd 咬合具及び咬合具付き包装袋
US6487758B2 (en) 2001-03-21 2002-12-03 Eaton Corporation Polypropylene recloseable zipper
US8459870B2 (en) * 2007-10-22 2013-06-11 Idemitsu Unitech Co., Ltd. Interlocking device and packaging bag with interlocking device
WO2015167405A1 (en) * 2014-04-29 2015-11-05 Oonpipat Vichanya Bag or bag cover with flexible zipper, and the production method of said flexible zipper

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU3247489A (en) * 1988-04-07 1989-10-12 Idemitsu Petrochemical Co., Ltd. Snap zipper, bag with snap zipper, manufacture method and apparatus for bag with snap zipper, and bagging method and apparatus for bag with snap zipper
JP2750382B2 (ja) * 1988-11-29 1998-05-13 出光石油化学株式会社 咬合具および咬合具付包装用袋
US5238306A (en) * 1989-05-19 1993-08-24 Reynolds Consumer Products, Inc. Method of producing a sealing system for a reclosable webbed-wall package, and system made
JP2716226B2 (ja) * 1989-11-28 1998-02-18 出光石油化学株式会社 咬合具および咬合具付包装用袋
US5100246A (en) * 1990-10-09 1992-03-31 Illinois Tool Works Inc. Pull bead and guide rails for easy open flexible containers
US5335995A (en) * 1993-07-16 1994-08-09 Servo Corporation Of America Resilient support for a railroad wheel heat sensor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6719678B1 (en) 2000-02-28 2004-04-13 C.L.P Industries Ltd. Recloseable retort pouch

Also Published As

Publication number Publication date
ES2111719T3 (es) 1998-03-16
EP0597650A1 (en) 1994-05-18
EP0731033B1 (en) 1999-05-06
EP0731035A3 (enrdf_load_stackoverflow) 1996-09-18
AU5052893A (en) 1994-05-19
KR940010950A (ko) 1994-06-20
DE69324827T2 (de) 1999-09-16
EP0731034A2 (en) 1996-09-11
DE69316712T2 (de) 1998-05-14
KR100296391B1 (ko) 2001-10-24
EP0731034A3 (enrdf_load_stackoverflow) 1996-09-18
EP0597650B1 (en) 1998-01-28
EP0731035A2 (en) 1996-09-11
DE69316712D1 (de) 1998-03-05
AU679004B2 (en) 1997-06-19
DE69324828T2 (de) 1999-09-16
EP0731033A2 (en) 1996-09-11
DE69324828D1 (de) 1999-06-10
DE69324827D1 (de) 1999-06-10
EP0731033A3 (enrdf_load_stackoverflow) 1996-09-25

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