EP0597650A1 - Snap zipper and bag with the same - Google Patents
Snap zipper and bag with the same Download PDFInfo
- Publication number
- EP0597650A1 EP0597650A1 EP93308892A EP93308892A EP0597650A1 EP 0597650 A1 EP0597650 A1 EP 0597650A1 EP 93308892 A EP93308892 A EP 93308892A EP 93308892 A EP93308892 A EP 93308892A EP 0597650 A1 EP0597650 A1 EP 0597650A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- resin
- snap zipper
- snap
- fused
- polyolefin
- 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.)
- Granted
Links
- 229920005989 resin Polymers 0.000 claims abstract description 93
- 239000011347 resin Substances 0.000 claims abstract description 93
- 229920000728 polyester Polymers 0.000 claims abstract description 58
- 229920000098 polyolefin Polymers 0.000 claims abstract description 53
- 229920001707 polybutylene terephthalate Polymers 0.000 claims abstract description 27
- 229920001971 elastomer Polymers 0.000 claims abstract description 25
- 239000000806 elastomer Substances 0.000 claims abstract description 25
- -1 polyethylene terephthalate Polymers 0.000 claims abstract description 19
- 239000004840 adhesive resin Substances 0.000 claims abstract description 16
- 229920006223 adhesive resin Polymers 0.000 claims abstract description 16
- 238000005452 bending Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract 2
- 239000000463 material Substances 0.000 claims description 27
- 229920001684 low density polyethylene Polymers 0.000 claims description 15
- 239000004702 low-density polyethylene Substances 0.000 claims description 15
- 229920001155 polypropylene Polymers 0.000 claims description 15
- 239000004743 Polypropylene Substances 0.000 claims description 14
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 8
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 8
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 7
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 6
- 150000001735 carboxylic acids Chemical class 0.000 claims description 5
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- 239000005062 Polybutadiene Substances 0.000 claims description 4
- 229920002857 polybutadiene Polymers 0.000 claims description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- 229920000515 polycarbonate Polymers 0.000 claims description 2
- 239000004417 polycarbonate Substances 0.000 claims description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 2
- 229920005672 polyolefin resin Polymers 0.000 claims 1
- 230000004927 fusion Effects 0.000 abstract description 49
- 239000000565 sealant Substances 0.000 abstract description 24
- 150000001732 carboxylic acid derivatives Chemical class 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 47
- 230000000052 comparative effect Effects 0.000 description 30
- 230000014759 maintenance of location Effects 0.000 description 14
- 238000011156 evaluation Methods 0.000 description 9
- 230000002950 deficient Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 229940127554 medical product Drugs 0.000 description 2
- 239000012748 slip agent Substances 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000002981 blocking agent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 229920000554 ionomer Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
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.
- 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.
- 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 according to a first aspect of the invention features that at least its portion for fusion is made of a material mainly composed of a polyolefin type adhesive resin.
- the polyolefin type adhesive resin has a structure, in which a mixture of one or more different varieties of polyolefin are partly graft coupled to an unsaturated carboxylic acid.
- polystyrene resin examples include low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), high density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA), polypropylene (PP), ethylene-butene-1 copolymer, ethylene-propylene copolymer, polybutadiene (PBd), etc.
- LDPE low density polyethylene
- L-LDPE linear low density polyethylene
- HDPE high density polyethylene
- EVA ethylene-vinyl acetate copolymer
- PP polypropylene
- PP ethylene-butene-1 copolymer
- PBd polybutadiene
- anhydrous maleic acid is suitably used as the unsaturated carboxylic acid.
- the portion for fusion need be mainly composed of a polyolefin type adhesive resin.
- the entire snap zipper including the portion for fusion may be mainly composed of a polyolefin type adhesive resin.
- a snap zipper according to a second aspect of the invention features that at least its portion for fusion is made of a material mainly composed of polybutylene terephthalate (PBT) or polyester type elastomer and that the resin of the portion for fusion has a bending modulus of elasticity of 10,000 kg/cm2 or below.
- PBT polybutylene terephthalate
- polyester type elastomer polyester type elastomer
- 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/cm2, 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.
- a snap zipper according to a third aspect of the invention features that at least its portion for fusion is made of a material having a composition including (1) polyester type elastomer and a polyolefin type resin and (2) polybutylene terephthalate (PBT) resin and a polyolefin type resin and that the content of the polyolefin type resin in the composition is 3 to 50 % by weight.
- PBT polybutylene terephthalate
- the portion for fusion need have the above composition.
- the entire snap zipper including the portion for fusion may be composed of (1) polyester type elastomer and a polyolefin type resin and (2) the PBT resin and a polyolefin type resin.
- the polyolefin type resin used may be the same polyolefin as used for the snap zipper according to the first aspect of the invention.
- the content of the polyolefin type resin in the snap zipper is 3 to 50 % by weight, suitably 10 to 40 % by weight. If the content is below 3 % by weight, the shape retention is deteriorated. If the content is above 50 % by weight, on the other hand, thermal fusion becomes difficult.
- 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 either of the first to third aspects of the invention noted above is fused via the portion for fusion to a bag body.
- the snap zipper according to the first to third aspects 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 (PBT) 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 (I0), 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.
- a polyolefin type adhesive resin was used "ADMAR SF700” (a trade name by Mitsui Sekiyu Kagaku C)., Ltd.).
- the melt flow ratio (MFR), density and Shore hardness (D scale) of "ADMAR SF700” are shown in Table 1 below.
- the male member 12 is a one-piece molding and has a strip-like stem portion 14, a head portion 15 of a heart-like sectional profile and a connecting portion 16 having a rod-like sectional profile, which connects together the portions 14 and 15.
- the female member 13 is also a one-piece molding and has a strip-like stem portion 17 serving as a portion to be fused, and a first and a second semicircular hook portion 18 and 19 formed on the stem portion 17 such that they face each other.
- the free ends 18A and 19A of the hook portions 18 and 19 define between them a gap 21 which has a width substantially corresponding to the thickness of the connecting portion 16.
- 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 difficultly engaged or could not be engaged.
- the stem portions 14 and 17 of the make and female members 12 and 13 were thermally fused to respective base films 23 of the bag body 22, and then three sides of the base films 23 were heat sealed, thus obtaining the embodiment of the bag 24 with snap zipper.
- the base film 23 had a five-layer structure with 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 served as the sealant layer of the bag body 22, to which the male or female member 12 or 13 was fused.
- the thermal fusion temperature in Table 2 indicates a mechanical strength of 300 g per 15 mm of width. It was measured by using a thermal gradient tester ("HG-100" by Toyo Seiki Co., Ltd.).
- 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.
- B indicates that both the thermal fusion and engagement performances are B
- F indicates that at least either the thermal fusion or the engagement performance is F.
- the individual embodiments of snap zipper 11 were produced by using polyolefin type adhesive resin. Then bags 24 with snap zipper according to the individual embodiments were produced by using the respective zippers 11.
- ADMAR SF170 As the polyolefin type adhesive resin of the snap zipper, "ADMAR SF170”, “ADMAR SE800” and “ADMAR SE810” (trade names by Mitsui Sekiyu Kagaku CO., Ltd.) were used in the respective embodiments. The characteristics of these resins are as shown in Table 1.
- the snap zippers 11 in Embodiments 1 to 4 are made of polyolefin type adhesive resin, 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.
- a strip-like male and a strip-like female member 12 and 13 of the snap zipper 11 in these embodiments were produced by extrusion molding using PBT as material resin with an extruder, followed by water cooling. These members were taken up on into rolls.
- the bending modulus of elasticity of the PBT resin was 3,500 kg/cm2.
- 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 method of measurement of the thermal fusion temperature was also as in Embodiment 1.
- 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 embodiments.
- 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 individual comparative examples of snap zipper were produced. Then bags with snap zipper according to the individual comparative examples were produced by using the respective zippers. Incidentally, the kinds and the bending modulus of elasticity of the used resin are shown in Table 3.
- the snap zippers 11 in Embodiments 5 to 7 are made of PBT resin having the bending modulus of elasticity of more than 10000 kg/cm2, 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.
- the individual embodiments of snap zipper 11 made of polyester type elastomer were produced. Then bags with snap zipper according to the individual Embodiments were produced by using the respective zippers.
- Embodiment 8 as polyester type elastomer was used "PELPRENE” (a trade name by Toyo Boseki Co., Ltd.), and in Embodiments 9 to 12 as polyester type elastomer was used “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 4.
- Embodiments 8 to 12 which are made of polyester type elastomers with a bending modulus of elasticity of 10,000 kg/cm2 or below, it is possible to obtain the same effects as in Embodiments 5 to 7 using PBT resin. The same effects can also be obtained with the bags 24 with snap zipper 11.
- a strip-like male and a strip-like female member 12 and 13 of each of snap zippers 11 in the individual embodiments, as shown in Figs. 1 and 2, were produced by extrusion molding using a material, which was composed of polyester type elastomer as a main material and polyolefin type resin as an auxiliary material, with an extruder, followed by water cooling.
- the kinds and proportions of the polyolefin type resins that were used in the individual embodiments are as in Table 5.
- the shape retention was evaluated such that the snap zipper 11 was B (Good) if it was satisfactory in the shape of the head portion 15 and hooks 18 and 19 and substantially free from twist in the stem portions (tape portions) 14 and 17, C (Fairly Good) if it had slight twist in the stem portions 14 and 17, and F (Fail) if it had much twist in the stem portions 14 and 17.
- the heat seal temperature was measured in the same way as above.
- B stands for a snap zipper, which is B or C in the shape retention and a heat seal strength of 15 mm width of 300 g or above
- F stands for a zipper, which is C or F in the shape retention and has a heat seal strength of 15 mm width of 300 g or below.
- the stem portions 14 and 17 of the male and female members 12 and 13 were then heat sealed to base films (70 ⁇ m thick) 23 of the bag body 22, and then the base films were heat sealed on three sides,thus obtaining the bag 21 with snap zipper in these embodiments.
- the base film 23 had a three-layer structure with two inner layers, i.e., a polyester type resin layer (53 ⁇ m) and an adhesive layer (5 ⁇ m) and an outer layer, i.e., PET layer (12 ⁇ m), the innermost polyester type resin layer being a sealant layer of the bag body 22, to which the male or female 12 or 13 was fused.
- Polyester type elastomer One-to-one blend of "HYTREL 6347" and “HYTREL 2551” PBT resin: "BZ11” (by DUPONT-TORAY Co., Ltd.)
- LDPE "ACEPOLYETHY F151” (by Acepolymer Co., Ltd.)
- L-LDPE "MORETECH 0368R” (by Idemitsu Sekiyu Kagaku Co., Ltd.)
- HDPE "IDEMITSU POLYETHYLENE 540B” (by Idemitsu Sekiyu Kagaku Co., Ltd.)
- PP "IDEMITSU POLYPRO F-205S” (by Idemitsu Sekiyu Kagaku Co., Ltd.)
- a strip-like male and a strip-like female member of each of snap zippers in the individual embodiments were produced by using a material, which was composed of polybutylene terephthalate as a main material and polyolefin type resin as an auxiliary material as Embodiments 13 to 28. Then, by using these zippers bags with zipper in the individual Embodiments were produced.
- the kinds and proportions of the polyolefin type resins that were used in the individual embodiments are as in Table 6.
- these bags 24 twist snap zippers 11 have no problem in the fusion strength between the snap zippers 11 and bag body 22.
- the bag body 24 is excellent in the sealing and unsealing of the snap zipper 11 and is satisfactory in appearance.
- the snap zipper in Comparative Example 13 had defective shape retention because it did not contain polyolefin type resin although it contained polyester type elastomer.
- the snap zippers in Comparative Examples 18 to 21 had some twist in the stem portion because their polyolefin type resin content exceeded the scope according to the invention although they contained polybutylene terephthalate resin and polyolefin type resin.
- the bag with snap zipper had problems in the fusion strength between the snap zipper and bag body.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bag Frames (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
- 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. In the bag with snap zipper, a strip-like snap zipper comprising a male and a female member is provided on the bag in a sealing portion thereof. Heretofore, various methods of producing bags with snap zipper have been proposed.
- Among the proposed methods, there are (1) one, in which a cylindrical film with a male and a female portion of a snap zipper is extrusion formed as a one-piece molding by using extrusion dies, and (2) one, in which a tape with a snap zipper is produced and is thermally fused to a base film for forming a bag body.
- In the former method (1), 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.
- The snap zipper is usually made of low density polyethylene (LDPE) or polypropylene (PP). In many cases, 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. For example, with a base film sealant layer of LDPE, the snap zipper is made of the same LDPE.
- 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.
- Meanwhile, 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.
- However, with a sealant layer of a polyester type resin which is a different material from LDPE or PP of the snap zipper, sufficient adhesion for fusing the snap zipper can not be obtained. Therefore, it has been difficult to use polyester type resins for the sealant layer.
- A snap zipper according to a first aspect of the invention features that at least its portion for fusion is made of a material mainly composed of a polyolefin type adhesive resin.
- The polyolefin type adhesive resin has a structure, in which a mixture of one or more different varieties of polyolefin are partly graft coupled to an unsaturated carboxylic acid.
- Among the polyolefin varieties are low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), high density polyethylene (HDPE), ethylene-vinyl acetate copolymer (EVA), polypropylene (PP), ethylene-butene-1 copolymer, ethylene-propylene copolymer, polybutadiene (PBd), etc.
- As the unsaturated carboxylic acid, anhydrous maleic acid is suitably used.
- In the snap zipper according to the first aspect of the invention, only the portion for fusion need be mainly composed of a polyolefin type adhesive resin. Of course, the entire snap zipper including the portion for fusion may be mainly composed of a polyolefin type adhesive resin.
- A snap zipper according to a second aspect of the invention features that at least its portion for fusion is made of a material mainly composed of polybutylene terephthalate (PBT) or polyester type elastomer and that the resin of the portion for fusion has a bending modulus of elasticity of 10,000 kg/cm² or below.
- In the snap zipper according to the second aspect of the invention, only the portion for fusion need be mainly composed of the PBT resin or polyester type elastomer. Of course, the entire snap zipper including the portion for fusion may be mainly composed of the PBT resin or polyester type elastomer.
- If the bending modulus of elasticity of the resin of the portion for fusion is above 10,000 kg/cm², adequate flexibility necessary for the snap zipper can not be obtained. Generally, 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.
- A snap zipper according to a third aspect of the invention features that at least its portion for fusion is made of a material having a composition including (1) polyester type elastomer and a polyolefin type resin and (2) polybutylene terephthalate (PBT) resin and a polyolefin type resin and that the content of the polyolefin type resin in the composition is 3 to 50 % by weight.
- In the snap zipper according to the third aspect of the invention, at least the portion for fusion need have the above composition. Of course, the entire snap zipper including the portion for fusion may be composed of (1) polyester type elastomer and a polyolefin type resin and (2) the PBT resin and a polyolefin type resin.
- The polyolefin type resin used may be the same polyolefin as used for the snap zipper according to the first aspect of the invention.
- The content of the polyolefin type resin in the snap zipper is 3 to 50 % by weight, suitably 10 to 40 % by weight. If the content is below 3 % by weight, the shape retention is deteriorated. If the content is above 50 % by weight, on the other hand, thermal fusion becomes difficult.
- 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.
- According to a fourth aspect of the invention, there is provided a bag with snap zipper, in which the snap zipper according to either of the first to third aspects of the invention noted above is fused via the portion for fusion to a bag body.
- The snap zipper according to the first to third aspects of the invention permits use of the polyester type resin for the bag body sealant layer, to which the snap zipper is fused. In this case, 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.
- For the snap zipper according to the invention, it is particularly suitable to use the polyester type resin as the material of the sealant layer.
- Examples of the polyester type resin are polyester (PET), polybutylene terephthalate (PBT) resin, polyester type elastomer, polycarbonate, etc. It is possible to use a blend resin composed of polyester and polyolefin type resins.
- Such 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.
- Regarding the prior art snap zipper, aluminum has been used as the material of the bag body in order to provide the odor retention and low drug absorption property. However, it is possible to permit cost reduction of the bag body by using polyester type resins in lieu of aluminum. Further, 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.
- As 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. Examples of such resin are LDPE, L-LDPE, PP, ethylene-vinyl acetate copolymer (EVA), ethylene-methacrylic acid copolymer (EMAA), ionomer (I0), etc.
- As the outer layer material, 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.
- Further, 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.
- In the accompanying drawings:
- Fig. 1 is a sectional view showing a male and a female member of an embodiment of the zipper according to the invention in a unchucked state;
- Fig. 2 is a sectional view showing the same embodiment of the zipper in the chucked state;
- Fig. 3 is a front view showing an embodiment of the bag with snap zipper according to the invention; and
- Fig. 4 is a sectional view showing the same embodiment of the bag with the snap zipper according to the invention.
- A strip-like male and also a strip-like
female member snap zipper 11, as shown in Figs. 1 and 2, were produced by extrusion molding them from a polyolefin type adhesive resin as material resin by using an extruder. As the polyolefin type adhesive resin was used "ADMAR SF700" (a trade name by Mitsui Sekiyu Kagaku C)., Ltd.). The melt flow ratio (MFR), density and Shore hardness (D scale) of "ADMAR SF700" are shown in Table 1 below. Themale member 12 is a one-piece molding and has a strip-like stem portion 14, ahead portion 15 of a heart-like sectional profile and a connectingportion 16 having a rod-like sectional profile, which connects together theportions - The
female member 13 is also a one-piece molding and has a strip-like stem portion 17 serving as a portion to be fused, and a first and a secondsemicircular hook portion stem portion 17 such that they face each other. The free ends 18A and 19A of thehook portions gap 21 which has a width substantially corresponding to the thickness of the connectingportion 16. - In
such snap zipper 11, the male andfemale members head portion 15 of themale member 12 was brought into contact with thehook portions female member 13. Then thehook portions head portion 15, and eventually thehook portion 15 was fitted in between thehook portions female members - The engagement performance was evaluated as such: It was A (Excellent), i.e., satisfactory, if the male and
female members - Then, as shown in Figs. 3 and 4, the
stem portions female members respective base films 23 of thebag body 22, and then three sides of thebase films 23 were heat sealed, thus obtaining the embodiment of thebag 24 with snap zipper. - The
base film 23 had a five-layer structure with four inner layers, i.e., a polyester type resin layer (15 µm), a PET layer (26 µm), a polyester type resin layer (12 µm) and an adhesive layer (5 µm), and an outer layer, i.e., a PET layer (12 µm). The innermost polyester type resin layer served as the sealant layer of thebag body 22, to which the male orfemale member - The thermal fusion temperature in Table 2 indicates a mechanical strength of 300 g per 15 mm of width. It was measured by using a thermal gradient tester ("HG-100" by Toyo Seiki Co., Ltd.).
- The performance of thermal fusion between the
zipper 11 andbase film 23 was evaluated. The result is shown in Table 2. - 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.
- In the column of the overall evaluation in Table 2, B indicates that both the thermal fusion and engagement performances are B, and F indicates that at least either the thermal fusion or the engagement performance is F.
- Like the Embodiment 1, the individual embodiments of
snap zipper 11 were produced by using polyolefin type adhesive resin. Thenbags 24 with snap zipper according to the individual embodiments were produced by using therespective zippers 11. - As the polyolefin type adhesive resin of the snap zipper, "ADMAR SF170", "ADMAR SE800" and "ADMAR SE810" (trade names by Mitsui Sekiyu Kagaku CO., Ltd.) were used in the respective embodiments. The characteristics of these resins are as shown in Table 1.
- As in Embodiment 1, the evaluation of the performance of engagement between the male and
female members zipper 11 andbase film 23 and the evaluation of the thermal fusion performance were made. The results are shown in Table 2. - Like the Embodiment 1, the individual embodiments of
snap zipper 11 were produced. Then bags with snap zipper according to the individual comparative examples were produced by using the respective zippers. Incidentally, the used materials for zippers are shown in Table 2. - As in Embodiment 1, the evaluation of the performance of engagement between the male and female members, measurement of the temperature of thermal fusion between the zipper and base film and the evaluation of the thermal fusion performance were made. The results are shown in Table 2.
TABLE 1 SF700 SF710 SE800 SE810 MFR190°C(g/10min) 1.0 3.4 4.4 7.2 DENSITY(g/cm³) 0.88 0.90 0.90 0.89 SHORE HARDNESS(D scale) 16 36 33 18 TABLE 2 NAME OF RESIN ENGAGEMENT PERFORMANCE THERMAL FUSION TEMPERATURE THERMAL FUSION PERFORMANCE OVERALL EVALUATION EMBODIMENT 1 SF700 B 115°C B B EMBODIMENT 2 SF710 B 118°C B B EMBODIMENT 3 SE800 B 105°C B B EMBODIMENT 4 SE810 B 102°C B B COMPARATIVE EXAMPLE 1 LDPE B - F F COMPARATIVE EXAMPLE 2 L-LDPE B - F F COMPARATIVE EXAMPLE 3 EVA B - F F COMPARATIVE EXAMPLE 4 PP B - F F - Since the snap zippers 11 in Embodiments 1 to 4 are made of polyolefin type adhesive resin, 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. - Also, with the snap zippers of these embodiments satisfactory fusion can be ensured even if the sealant layer of the
base film 23 of thebag body 24 is of a different material (polyester type resin) from that of thesnap zipper 11, that is, the adhesion between thesnap zipper 11 and sealant layer is satisfactory. - Further, since the temperature of fusion to the sealant layer is comparatively low, the fusion can be readily attained. Thus, it is possible to increase the productivity. In addition, it is possible to obtain
bag 24 withsnap zipper 11 which has satisfactory appearance. - With zippers in Comparative Examples 1 to 4, which are made of LDPE, EVA or PP resin other than polyolefin type adhesive resin, the fusion performance is defective although the engagement performance is satisfactory.
- A strip-like male and a strip-like
female member snap zipper 11 in these embodiments, as shown in Figs. 1 and 2, were produced by extrusion molding using PBT as material resin with an extruder, followed by water cooling. These members were taken up on into rolls. The bending modulus of elasticity of the PBT resin was 3,500 kg/cm². - Of these snap zippers 11, the flexibility and engagement performance were evaluated. Further, the thermal fusion temperature was measured. The results are shown in Table 3.
- The flexibility was evaluated with respect to the state of take-up of the male and
female members female members - As for the engagement performance, the method and standards of evaluation were as in Embodiment 1.
- The method of measurement of the thermal fusion temperature was also as in Embodiment 1.
- Then, as shown in Figs. 3 and 4, the
stem portions female members bag body 22, and then three sides of the films were heat sealed, thus obtaining thebag 24 with snap zipper in these embodiments. - The
base film 23 had a five-layer structure having four inner layers, i.e., a polyester type resin layer (15 µm), a PET layer (26 µm), a polyester type resin layer (12 µm) and an adhesive layer (5 µm) and an outer layer, i.e., a PET layer (12 µm). The innermost polyester type resin layer was the sealant layer of thebag body 22, to which the male orfemale member - Like the Embodiment 5, the individual embodiments of
PBT snap zipper 11 were produced. Then bags withsnap zipper 24 according to the individual embodiments were produced by using the respective zippers. - Incidentally, the bending modulus of elasticity of the PBT resin are shown in Table 3.
- Of these snap zippers 11, the flexibility and engagement performance were evaluated as Embodiments 5. Further, the thermal fusion temperature was measured. The results are shown in Table 3.
- Like the Embodiment 1, the individual comparative examples of snap zipper were produced. Then bags with snap zipper according to the individual comparative examples were produced by using the respective zippers. Incidentally, the kinds and the bending modulus of elasticity of the used resin are shown in Table 3.
-
- Since the snap zippers 11 in Embodiments 5 to 7 are made of PBT resin having the bending modulus of elasticity of more than 10000 kg/cm², 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. - Also, with the snap zippers of these embodiments satisfactory fusion can be ensured even if the sealant layer of the
base film 23 of thebag body 24 is of a different material (polyester type resin) from that of thesnap zipper 11, that is, the adhesion between thesnap zipper 11 and sealant layer is satisfactory. - Further, since the temperature of fusion to the sealant layer is comparatively low, the fusion can be readily attained. Thus, it is possible to increase the productivity. In addition, it is possible to obtain
bag 24 withsnap zipper 11 which has satisfactory appearance. - With zippers in Comparative Examples 5 to 7, which are made of PBT resin, the flexibility and the engagement performance is not satisfactory and the fusion temperature is rather high since the bending modulus of elasticity is over 10000 kg/cm².
- With zippers in Comparative Examples 8 to 9, which are made of LDPE or PP resin, the fusion performance is defective although the engagement performance is satisfactory.
- Like the Embodiment 5, the individual embodiments of
snap zipper 11 made of polyester type elastomer were produced. Then bags with snap zipper according to the individual Embodiments were produced by using the respective zippers. - In Embodiment 8 as polyester type elastomer was used "PELPRENE" (a trade name by Toyo Boseki Co., Ltd.), and in Embodiments 9 to 12 as polyester type elastomer was used "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 4.
- Of these snap zippers 11, the flexibility and engagement performance were evaluated as Embodiments 5. Further, the thermal fusion temperature was measured. The results are shown in Table 4.
- Like the Embodiment 5, the individual embodiments of snap zipper were produced. Then bags with snap zipper according to the individual comparative examples were produced by using the respective zippers.
- Incidentally, the bending modulus of elasticity and the melting point of the resin are shown in Table 4.
-
- With the snap zippers 11 in Embodiments 8 to 12, which are made of polyester type elastomers with a bending modulus of elasticity of 10,000 kg/cm² or below, it is possible to obtain the same effects as in Embodiments 5 to 7 using PBT resin. The same effects can also be obtained with the
bags 24 withsnap zipper 11. - With the zipper in Comparative Example 10, which is made of polyester type elastomer, the bending modulus of elasticity is above 10,000 kg/cm². The flexibility and engagement performance are defective. Besides, the thermal fusion temperature is comparatively high.
- With the zippers in Comparative Examples 11 and 12, which are made of LDPE or PP resin, the thermal fusion performance is defective although the engagement performance is satisfactory.
- A strip-like male and a strip-like
female member - The shape retention of the snap zippers 11 of the individual embodiments was evaluated. Also, the heat seal temperature was measured. The results are shown in Table 5.
- The shape retention was evaluated such that the
snap zipper 11 was B (Good) if it was satisfactory in the shape of thehead portion 15 and hooks 18 and 19 and substantially free from twist in the stem portions (tape portions) 14 and 17, C (Fairly Good) if it had slight twist in thestem portions stem portions - The heat seal temperature was measured in the same way as above.
- In the evaluation column in the Table, B stands for a snap zipper, which is B or C in the shape retention and a heat seal strength of 15 mm width of 300 g or above, and F stands for a zipper, which is C or F in the shape retention and has a heat seal strength of 15 mm width of 300 g or below.
- As shown in Figs. 3 and 4, the
stem portions female members bag body 22, and then the base films were heat sealed on three sides,thus obtaining thebag 21 with snap zipper in these embodiments. - The
base film 23 had a three-layer structure with two inner layers, i.e., a polyester type resin layer (53 µm) and an adhesive layer (5 µm) and an outer layer, i.e., PET layer (12 µm), the innermost polyester type resin layer being a sealant layer of thebag body 22, to which the male or female 12 or 13 was fused. - The product manes and manufacture companies of the main and auxiliary materials used in the embodiments and comparative embodiments are as follows.
- Polyester type elastomer: One-to-one blend of "HYTREL 6347" and "HYTREL 2551"
PBT resin: "BZ11" (by DUPONT-TORAY Co., Ltd.)
LDPE: "ACEPOLYETHY F151" (by Acepolymer Co., Ltd.)
L-LDPE: "MORETECH 0368R" (by Idemitsu Sekiyu Kagaku Co., Ltd.)
HDPE: "IDEMITSU POLYETHYLENE 540B" (by Idemitsu Sekiyu Kagaku Co., Ltd.)
PP: "IDEMITSU POLYPRO F-205S" (by Idemitsu Sekiyu Kagaku Co., Ltd.) - As in
Embodiments 13 to 28, snap zippers in the individual comparative examples were produced. Then, by using these zippers bags with zipper in the individual comparative examples were produced. - The kinds and proportions of the polyolefin type resins used in the individual comparative examples are shown in Table 5.
-
- A strip-like male and a strip-like female member of each of snap zippers in the individual embodiments were produced by using a material, which was composed of polybutylene terephthalate as a main material and polyolefin type resin as an auxiliary material as
Embodiments 13 to 28. Then, by using these zippers bags with zipper in the individual Embodiments were produced. - The kinds and proportions of the polyolefin type resins that were used in the individual embodiments are as in Table 6.
- The shape retention of the snap zippers 11 of the individual embodiments was evaluated. Also, the heat seal temperature was measured. The results are shown in Table 6.
- As in Embodiments 29 to 44, snap zippers in the individual comparative examples were produced. Then, by using these zippers bags with zipper in the individual comparative examples were produced.
- The kinds and proportions of the polyolefin type resins used in the individual comparative examples are shown in Table 6.
-
- From Tables 5 and 6, it will be seen that in the
snap zipper 11 in each of Embodiments 13 to 28, in which the male andfemale members female members - Also, it will be seen that these
bags 24 twist snap zippers 11 have no problem in the fusion strength between the snap zippers 11 andbag body 22. Thus, thebag body 24 is excellent in the sealing and unsealing of thesnap zipper 11 and is satisfactory in appearance. - The snap zipper in Comparative Example 13 had defective shape retention because it did not contain polyolefin type resin although it contained polyester type elastomer.
- The snap zippers in Comparative Examples 14 to 17 had some twist in the stem portion (tape portion) because their polyolefin type resin, although contained, exceeded the scope according to the invention in the content. Further, bags with snap zipper produced by using these snap zippers had problems in the mechanical strength of fusion between the snap zipper and bag body.
- The snap zippers in Comparative Examples 18 to 21 had some twist in the stem portion because their polyolefin type resin content exceeded the scope according to the invention although they contained polybutylene terephthalate resin and polyolefin type resin. In addition, in this case the bag with snap zipper had problems in the fusion strength between the snap zipper and bag body.
- As has been shown in the above embodiments, with the snap zipper and the bag with snap zipper according to the invention it is possible to obtain fusion of the snap zipper to the polyester type resin sealant of the bag body without any trouble and also obtain sufficient mechanical strength of fusion.
Claims (16)
- A snap zipper, in which at least a portion to be fused is mainly composed of a polyolefin type adhesive resin.
- The snap zipper according to claim 1, wherein said polyolefin type adhesive resin has a structure obtained as a result of partial grafting of unsaturated carboxylic acid to a mixture of one or more polyolefin varieties.
- The snap zipper according to claim 2, wherein said unsaturated carboxylic acid is anhydrous maleic acid.
- The snap zipper according to claim 2, wherein said polyolefin is selected from the group consisting of low density polyethylene, linear low density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer, polypropylene, ethylene-butene-1 copolymer, ethylene-propylene copolymer and polybutadiene.
- A snap zipper, in which at least a portion to be fused is mainly composed of polyethylene terephthalate (PBT) resin or polyester type elastomer, the resin in said portion to be fused having a bending modulus of elasticity of 10,000 kg/cm² or below.
- A snap zipper, in which at least a portion to be fused is mainly composed of polyester type elastomer or polybutylene terephthalate resin and polyolefin type resin, the composition containing 3 to 50 % by weight of said polyolefin type resin.
- The snap zipper according to claim 6, wherein said composition contains 10 to 40 % by weight of said polyolefin type resin.
- The snap zipper according to claim 6, wherein said polyolefin is selected from the group consisting of low density polyethylene, linear low density polyethylene, high density polyethylene, ethylene-vinyl acetate copolymer, polypropylene, ethyl-butene-1 copolymer, ethylene-propylene copolymer and polybutadiene.
- A bag with snap zipper, said snap zipper having a portion fused to a polyester type resin layer of a bag body.
- The bag with snap zipper according to claim 10, wherein said polyester type resin is selected from the group consisting of polyester, polybutylene terephthalate resin, polyester type elastomer, and polycarbonate.
- The bag with snap zipper according to claim 9, wherein said snap zipper has at least a portion to be fused, said portion to be fused being mainly composed of polyolefin type adhesive resin.
- The bag with snap zipper according to claim 9, wherein said polyolefin type adhesive resin has a structure obtained as a result of partial grafting of unsaturated carboxylic acid to a mixture of one or more polyolefin varieties.
- The bag with snap zipper according to claim 9, wherein at least a portion to be fused of said snap zipper is mainly composed of polybutylene terephthalate (PBT) resin or polyester type elastomer, the resin of said portion to be fused having a bending modulus of elasticity of 10,000 kg/cm² or below.
- The bag with snap zipper according to claim 9, wherein at least a portion to be fused of said snap zipper is made of a material composed of polyester type elastomer, polybutylene terephthalate resin and polyolefin resin, the composition containing 3 to 50 % by weight of said polyolefin type resin.
- The bag with snap zipper according to claim 9, wherein at least a portion to be fused of said snap zipper is made of a material composed of polyester type elastomer, polybutylene terephthalate resin and polyolefin type resin.
- The bag with snap zipper according to claim 15, wherein the content of said polyolefin type resin is 10 to 40 % by weight.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96106556A EP0731034B1 (en) | 1992-11-09 | 1993-11-08 | Snap zipper and bag with the same |
EP96106533A EP0731033B1 (en) | 1992-11-09 | 1993-11-08 | Snap zipper and bag with the same |
EP96106557A EP0731035A2 (en) | 1992-11-09 | 1993-11-08 | Snap zipper and bag with the same |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP29862492 | 1992-11-09 | ||
JP29862592A JPH06144451A (en) | 1992-11-09 | 1992-11-09 | Claw device and wrapping bag with its claw device |
JP298624/92 | 1992-11-09 | ||
JP298625/92 | 1992-11-09 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96106556A Division EP0731034B1 (en) | 1992-11-09 | 1993-11-08 | Snap zipper and bag with the same |
EP96106533A Division EP0731033B1 (en) | 1992-11-09 | 1993-11-08 | Snap zipper and bag with the same |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0597650A1 true EP0597650A1 (en) | 1994-05-18 |
EP0597650B1 EP0597650B1 (en) | 1998-01-28 |
Family
ID=26561598
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93308892A Expired - Lifetime EP0597650B1 (en) | 1992-11-09 | 1993-11-08 | Bag with a snap zipper |
EP96106556A Expired - Lifetime EP0731034B1 (en) | 1992-11-09 | 1993-11-08 | Snap zipper and bag with the same |
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 |
---|---|---|---|
EP96106556A Expired - Lifetime EP0731034B1 (en) | 1992-11-09 | 1993-11-08 | Snap zipper and bag with the same |
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) | EP0597650B1 (en) |
KR (1) | KR100296391B1 (en) |
AU (1) | AU679004B2 (en) |
DE (3) | DE69316712T2 (en) |
ES (1) | ES2111719T3 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0801003A2 (en) * | 1996-04-12 | 1997-10-15 | Idemitsu Petrochemical Co., Ltd. | Snap-zipper and bag with the same |
EP0814026A2 (en) * | 1996-06-17 | 1997-12-29 | Idemitsu Petrochemical Co., Ltd. | Snap zipper and a bag with the same |
CN101827541B (en) * | 2007-10-22 | 2011-12-21 | 出光统一科技株式会社 | Interlocking device and packaging bag with interlocking device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6719678B1 (en) | 2000-02-28 | 2004-04-13 | C.L.P Industries Ltd. | Recloseable retort pouch |
US6487758B2 (en) | 2001-03-21 | 2002-12-03 | Eaton Corporation | Polypropylene recloseable zipper |
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 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0339324A1 (en) * | 1988-04-07 | 1989-11-02 | Idemitsu Petrochemical Co. Ltd. | Snap zipper, bag with snap zipper, manufacturing method and apparatus for bag with snap zipper, and bagging method and apparatus for bag with snap zipper |
EP0371402A2 (en) * | 1988-11-29 | 1990-06-06 | Idemitsu Petrochemical Co. Ltd. | Fastener and wrapping bag having the same |
EP0398731A2 (en) * | 1989-05-19 | 1990-11-22 | Reynolds Consumer Products, Inc. | Method of producing a sealing system foe a reclosable film wall package, and system made by such a method |
JPH03176365A (en) * | 1989-11-28 | 1991-07-31 | Idemitsu Petrochem Co Ltd | Intermeshing tool and packaging bag with intermeshing member |
EP0480605A1 (en) * | 1990-10-09 | 1992-04-15 | Illinois Tool Works Inc. | Easy open flexible containers |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5335995A (en) * | 1993-07-16 | 1994-08-09 | Servo Corporation Of America | Resilient support for a railroad wheel heat sensor |
-
1993
- 1993-11-04 KR KR1019930023297A patent/KR100296391B1/en not_active IP Right Cessation
- 1993-11-08 DE DE69316712T patent/DE69316712T2/en not_active Expired - Fee Related
- 1993-11-08 ES ES93308892T patent/ES2111719T3/en not_active Expired - Lifetime
- 1993-11-08 EP EP93308892A patent/EP0597650B1/en not_active Expired - Lifetime
- 1993-11-08 DE DE69324828T patent/DE69324828T2/en not_active Expired - Fee Related
- 1993-11-08 EP EP96106556A patent/EP0731034B1/en not_active Expired - Lifetime
- 1993-11-08 DE DE69324827T patent/DE69324827T2/en not_active Expired - Fee Related
- 1993-11-08 EP EP96106557A patent/EP0731035A2/en not_active Withdrawn
- 1993-11-08 EP EP96106533A patent/EP0731033B1/en not_active Expired - Lifetime
- 1993-11-09 AU AU50528/93A patent/AU679004B2/en not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0339324A1 (en) * | 1988-04-07 | 1989-11-02 | Idemitsu Petrochemical Co. Ltd. | Snap zipper, bag with snap zipper, manufacturing method and apparatus for bag with snap zipper, and bagging method and apparatus for bag with snap zipper |
EP0371402A2 (en) * | 1988-11-29 | 1990-06-06 | Idemitsu Petrochemical Co. Ltd. | Fastener and wrapping bag having the same |
EP0398731A2 (en) * | 1989-05-19 | 1990-11-22 | Reynolds Consumer Products, Inc. | Method of producing a sealing system foe a reclosable film wall package, and system made by such a method |
JPH03176365A (en) * | 1989-11-28 | 1991-07-31 | Idemitsu Petrochem Co Ltd | Intermeshing tool and packaging bag with intermeshing member |
EP0480605A1 (en) * | 1990-10-09 | 1992-04-15 | Illinois Tool Works Inc. | Easy open flexible containers |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 015, no. 416 (M - 1172) 23 October 1991 (1991-10-23) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0801003A2 (en) * | 1996-04-12 | 1997-10-15 | Idemitsu Petrochemical Co., Ltd. | Snap-zipper and bag with the same |
EP0801003A3 (en) * | 1996-04-12 | 1999-02-10 | Idemitsu Petrochemical Co., Ltd. | Snap-zipper and bag with the same |
EP0814026A2 (en) * | 1996-06-17 | 1997-12-29 | Idemitsu Petrochemical Co., Ltd. | Snap zipper and a bag with the same |
EP0814026A3 (en) * | 1996-06-17 | 1999-01-13 | Idemitsu Petrochemical Co., Ltd. | Snap zipper and a bag with the same |
CN101827541B (en) * | 2007-10-22 | 2011-12-21 | 出光统一科技株式会社 | Interlocking device and packaging bag with interlocking device |
Also Published As
Publication number | Publication date |
---|---|
AU5052893A (en) | 1994-05-19 |
DE69324828D1 (en) | 1999-06-10 |
KR940010950A (en) | 1994-06-20 |
AU679004B2 (en) | 1997-06-19 |
DE69324827D1 (en) | 1999-06-10 |
DE69316712D1 (en) | 1998-03-05 |
EP0731035A3 (en) | 1996-09-18 |
EP0731033A2 (en) | 1996-09-11 |
DE69316712T2 (en) | 1998-05-14 |
EP0731034B1 (en) | 1999-05-06 |
DE69324827T2 (en) | 1999-09-16 |
EP0731034A3 (en) | 1996-09-18 |
EP0731035A2 (en) | 1996-09-11 |
DE69324828T2 (en) | 1999-09-16 |
ES2111719T3 (en) | 1998-03-16 |
EP0731034A2 (en) | 1996-09-11 |
EP0597650B1 (en) | 1998-01-28 |
EP0731033B1 (en) | 1999-05-06 |
KR100296391B1 (en) | 2001-10-24 |
EP0731033A3 (en) | 1996-09-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US5603995A (en) | Snap zipper and bag with the same | |
KR970007119B1 (en) | Fastener and wrapping bag having the same | |
JP4856853B2 (en) | Zipper tape and packaging bag with zipper tape | |
US4615922A (en) | Oriented polymeric film | |
US5006380A (en) | Draw tape bag with multilayer draw tape | |
US5216787A (en) | Co-extruded profile strip containing lateral webs with adhesive subdivided into ribs | |
US4557780A (en) | Method of making an oriented polymeric film | |
US5242516A (en) | Co-extruded profile strip containing lateral webs with adhesive subdivided into ribs | |
US20040130058A1 (en) | Zipper tape for a bag and method of producing the same | |
US5645905A (en) | Snap zipper | |
US8481135B2 (en) | Engaging member and packing bag with engaging member | |
EP0584808B1 (en) | Collapsible tube and its head | |
CA2114749A1 (en) | Biaxially oriented multilayer polyolefin film which can be heat-sealed at low temperatures, process for the production thereof and the uses thereof | |
EP0597650A1 (en) | Snap zipper and bag with the same | |
US7246415B2 (en) | Zipper and the packaging therewith | |
KR101000645B1 (en) | Clamping device, and packaging bag with clamping device | |
JP2868979B2 (en) | Articulator and packaging bag with articulator | |
JPH0937815A (en) | Engaging element and packaging bag with engaging element | |
JPH06144451A (en) | Claw device and wrapping bag with its claw device | |
JP3244842B2 (en) | Articulator and packaging bag with articulator | |
JPS5931152A (en) | Plastic film and bag and large-sized bag for the film | |
JP3052518U (en) | Synthetic resin storage case | |
JP3773279B2 (en) | Occlusion device and packaging bag with occlusion device | |
CA1333898C (en) | Draw tape bag with multilayer draw tape | |
JPH09156646A (en) | Bag body having fastener |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT |
|
17P | Request for examination filed |
Effective date: 19940929 |
|
17Q | First examination report despatched |
Effective date: 19960123 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): DE ES FR GB IT |
|
DX | Miscellaneous (deleted) | ||
ITF | It: translation for a ep patent filed | ||
REF | Corresponds to: |
Ref document number: 69316712 Country of ref document: DE Date of ref document: 19980305 |
|
ET | Fr: translation filed | ||
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2111719 Country of ref document: ES Kind code of ref document: T3 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 19991103 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 19991108 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 19991109 Year of fee payment: 7 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: ES Payment date: 19991130 Year of fee payment: 7 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001108 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20001109 |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20001108 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010731 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010801 |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20011214 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20051108 |