WO1997002141A1 - Stratifie - Google Patents
Stratifie Download PDFInfo
- Publication number
- WO1997002141A1 WO1997002141A1 PCT/JP1996/001793 JP9601793W WO9702141A1 WO 1997002141 A1 WO1997002141 A1 WO 1997002141A1 JP 9601793 W JP9601793 W JP 9601793W WO 9702141 A1 WO9702141 A1 WO 9702141A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- polypropylene
- weight
- melting point
- laminate
- Prior art date
Links
- 239000004743 Polypropylene Substances 0.000 claims abstract description 73
- 229920001155 polypropylene Polymers 0.000 claims abstract description 73
- -1 polypropylene Polymers 0.000 claims abstract description 54
- 238000002844 melting Methods 0.000 claims abstract description 28
- 230000008018 melting Effects 0.000 claims abstract description 28
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011347 resin Substances 0.000 claims abstract description 18
- 239000000155 melt Substances 0.000 claims abstract description 13
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 10
- 230000032798 delamination Effects 0.000 claims description 22
- 239000004698 Polyethylene Substances 0.000 claims description 12
- 229920000573 polyethylene Polymers 0.000 claims description 9
- 239000010410 layer Substances 0.000 abstract description 94
- 239000011229 interlayer Substances 0.000 abstract description 7
- 239000012790 adhesive layer Substances 0.000 description 27
- 238000007789 sealing Methods 0.000 description 18
- 238000000926 separation method Methods 0.000 description 16
- 230000001954 sterilising effect Effects 0.000 description 15
- 238000004659 sterilization and disinfection Methods 0.000 description 15
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 239000004715 ethylene vinyl alcohol Substances 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 210000004709 eyebrow Anatomy 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000001771 impaired effect Effects 0.000 description 5
- 238000003475 lamination Methods 0.000 description 5
- 235000013305 food Nutrition 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 4
- 239000004700 high-density polyethylene Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 235000019198 oils Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000011888 foil Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004806 packaging method and process Methods 0.000 description 3
- 229920000139 polyethylene terephthalate Polymers 0.000 description 3
- 239000005020 polyethylene terephthalate Substances 0.000 description 3
- 229920005992 thermoplastic resin Polymers 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920001707 polybutylene terephthalate Polymers 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 150000001244 carboxylic acid anhydrides Chemical class 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000012793 heat-sealing layer Substances 0.000 description 1
- RYPKRALMXUUNKS-UHFFFAOYSA-N hex-2-ene Chemical compound CCCC=CC RYPKRALMXUUNKS-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000009823 thermal lamination Methods 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 239000008158 vegetable oil Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
-
- 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
- B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
- B65D2577/10—Container closures formed after filling
- B65D2577/20—Container closures formed after filling by applying separate lids or covers
- B65D2577/2025—Multi-layered container, e.g. laminated, coated
- B65D2577/2033—Multi-layered container, e.g. laminated, coated with one or more layers of container being torn off upon initial opening
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08L23/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1379—Contains vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit
- Y10T428/1383—Vapor or gas barrier, polymer derived from vinyl chloride or vinylidene chloride, or polymer containing a vinyl alcohol unit is sandwiched between layers [continuous layer]
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- Y10T428/2813—Heat or solvent activated or sealable
- Y10T428/2817—Heat sealable
- Y10T428/2826—Synthetic resin or polymer
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
- Y10T428/31909—Next to second addition polymer from unsaturated monomers
- Y10T428/31913—Monoolefin polymer
Definitions
- the present invention relates to a laminate which is preferably used in the field of packaging, particularly for the production of containers, and an easily-openable container which is excellent in hermeticity and openability for storing and packaging foods, medicines, etc. produced using the same. .
- the release layer is made of PE (polyethylene), the upper limit of these containers is 120 ° C as a high-temperature treatment condition. Particularly, when a cooked food containing a large amount of oil is filled, the release layer is Swelling was observed, and the sealing with the lid material was broken due to softening of the sealing layer due to high temperature.
- PE polyethylene
- An object of the present invention is to provide a laminate suitably used for manufacturing an easily-openable container in which a heat-sealing layer and an opening-peeling layer are separated from each other, and ensure the easy-peelability of the opening-peeling layer (seal layer).
- Another object of the present invention is to provide a laminate having heat resistance and oil resistance.
- the present inventors have conducted intensive studies in order to achieve the above object, and as a result, have found that the above-mentioned problem can be solved by forming a laminate used for manufacturing an easily-openable container into a specific layer configuration.
- the present invention has been completed based on this finding.
- the first layer is a sealing layer (A) made of polypropylene having a melting point of 160 ° C. or more
- the second layer is 20 to 90% by weight of polypropylene and 80 to 10% of 4-methylpentene 1 resin.
- the adjoining layer (B) composed of a mixture of 3% by weight has a melting point of 160 ° C. or more as the third layer
- an intermediate layer (C) composed of polypropylene having a melt index (JISK 6758) of 0.5 to 30.
- the melt index of the seal layer (A) is the same as that of the intermediate layer (C). 1.
- the melt index of the intermediate layer (C) is larger than that of the base layer (D), and the delamination strength between (A) and (B) is between (B) and (C).
- Weaker than delamination strength, delamination strength between (A) and (B) is 0.2-2.5 kg mm (pulling speed: 300 mm / min) and a laminate comprising at least four layers.
- the intermediate layer (B) may be composed of 20 to 90% by weight of polypropylene and 4 resin of 1-methylpentene.
- a laminate comprising 3 to 20 parts by weight of polyethylene or unsaturated carboxylic acid-modified polypropylene with respect to 100 parts by weight of a mixture of up to 10% by weight, preferably an innermost layer.
- (A) is a laminate having a thickness of 5 to 100 or less.
- the sealing layer (A) of the present invention is made of polypropylene (hereinafter referred to as PP) having a melting point of 160 ° C. or higher.
- PP polypropylene
- the melt index (JISK 6758) of the PP used in (A) must be at least 1.1 times the PP used in (C). It is necessary.
- Ml melt index
- the delamination strength of the two layers sandwiching (B) is affected by the Ml of the PP adjacent to (B), and that the larger the Ml is, the smaller the intergranular peel strength is.
- the strength is lower than between (B) and (C), making it suitable for easy opening.
- the thickness of (A) is preferably 5 to 100 mm. If it is smaller than 5 mm, the sealing will be insufficient, and if it is larger than 100, the feeling of opening may be impaired.
- the PP used is arbitrary as long as its melting point is 160 ° C and Ml is 1.1 times or more of (C). It is also possible to blend 3 to 20 parts by weight of polyethylene with 100 parts by weight of PP in consideration of the sealing property with the lid and moldability.
- a blend of a thermoplastic resin such as an unsaturated carboxylic acid-modified polyolefin / ethylene vinyl acetate can be used as long as the heat-resistant separation with the adjacent layer is not impaired.
- the intermediate layer (C) of the present invention aims at maintaining the strength, heat resistance and moldability of the laminate.
- This layer also requires heat resistance, and polypropylene having a melting point of 160 ° C or more is used.
- one of the purposes of the intermediate layer is to adjust the peel strength between the eyebrows with the adjacent layer (B), and 1 ⁇ 1 needs to be 0.5 to 30.
- Ml is 30 or more, it is difficult to adjust the eyebrow separation strength between (A) and (B) and between (B) and (C), making it difficult to provide a difference in the eyebrow separation strength.
- an arbitrary thermoplastic resin such as polyethylene for the purpose of adjusting the moldability and the like.
- the base material layer (D) of the present invention is a PP having a melting point of 160 ° C. or more, and the base material layer (D) occupies a large ratio of the thickness of the laminate and affects the formability and the like.
- Ml needs to be 0.01 to 4. If the MI is larger than 4, the drawdown becomes large when heating to form the laminate, and a satisfactory molded product cannot be obtained.
- polypropylene having a melting point of 160 ° C. or more and MI of 0.01 to 4 is used, any thermoplastic resin such as polyethylene can be blended to improve moldability and the like.
- the adjacent layer (B) of the present invention plays the most important role in the present invention, and this layer is mainly composed of a blend of polypropylene and 4-methylpentene-1 resin.
- the blending ratio is arbitrary, but it is preferable that the amount of polypropylene is 90 to 20% by weight and the amount of 4-methylpentene 1 resin is 80 to 10% by weight.
- the most preferable compounding ratio is 80 to 40% by weight in terms of the amount of polypropylene. If the amount of polypropylene is 90% by weight or more, opening becomes difficult, and if the amount is 20% by weight or less, delamination strength is weakened and delamination may occur.
- Polyethylene can be blended to adjust the delicate interlayer separation strength.However, if the blending amount is too large, the intended heat resistance may be impaired. On the other hand, the upper limit is 20 parts by weight, and if the blending amount is small, the interlayer separation strength cannot be adjusted. Therefore, the lower limit is desirably 3 parts by weight.
- unsaturated carboxylic acid-modified polypropylene may be blended in order to finely adjust the delamination strength. However, if this blending amount is too large, the separation strength is increased and the blend is increased. If the amount is small, the delamination strength may be lost, so the amount is preferably 20 parts by weight or less and 3 parts by weight or more.
- any resin can be laminated outside the layer (D) or between the layers (C) and (D).
- Resins to be laminated include polycarbonate (PC), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene (PP), vinylidene chloride resin (PVDC), ethylene vinyl alcohol copolymer (EVOH), and inorganic substances. There are filled polypropylene, etc.
- the outside of (D) and the space between layers (C) and (D) are not limited to a single layer, but may be arbitrarily selected, such as a multi-layer structure.
- the adhesive layer (AD) is preferably an unsaturated carboxylic acid-modified polypropylene. That is, the layer added outside the layer (D) or between the layers (C) and (D) can be arbitrarily selected, such as PPZADZEVOHZAD / PP PP / AD / PVDC / AD / PP. In addition, not only plastics but also metal layers such as aluminum foil and steel foil can be used. In particular, when it is necessary to improve the oxygen gas barrier properties of the laminate, an ethylene vinyl alcohol copolymer is laminated outside the (D) layer or between the (C) and (D) layers. An ethylene polymerization ratio of 20 to 50% by weight is optionally used according to the purpose.
- the layer structure is preferably eight layers of A / B / C / PP / AD / EVOH / AD / D.
- the layer configuration of the present invention can be obtained by coextrusion, lamination, or the like using the above-mentioned resin.
- a lamination process any method such as extrusion lamination, coextrusion lamination, dry lamination, and thermal lamination can be used.
- the most important point of the present invention is that polypropylene and 4-methylpentene 1 resin are blended as the adjacent layer (B).
- the melting point of polypropylene is usually about 150 ° C for random PP and about 160 ° C for homo PP.
- the melting point of 4-methylpentene 1 resin is about 240 ° C.
- they have a higher heat resistance of 15 ° C or more than the conventional intermediate layer mainly composed of polyethylene, and the temperature of the contents is high during sterilization (for example, 140 ° C). Above), the intermediate layer does not soften or melt.
- the melting point of HDPE high-density polyethylene
- the intermediate layer according to the present invention when used, the intermediate layer itself has excellent heat resistance even at a high temperature treatment of 130 ° C. or more, so that the above-mentioned form is not obtained, and a stable high temperature treatment is possible. Becomes
- PP used for each of the layers (A), (C) and (D), which are the main layers of the present invention has a melting point of 160 ° C. or more and is excellent in heat resistance. By using these PP, even when the temperature of the contents partially rises due to microwave heating, etc. The laminate does not deform due to heat. Also, desirably, by using PP having a melting point of 160 ° C. or more and a high degree of crystallinity, the rigidity is further improved and good heat resistance is obtained. These allow more stable high-temperature treatment.
- the layer (B) when a blend of polypropylene and 4-methylpentene for one month is laminated as the layer (B), easy release is exhibited.
- the strength depends on the blending ratio. For example, if the mixing ratio is in the range of 50 to 90% by weight of polypropylene by weight, the interlaminar bond strength is in the range of 0.5 to 2.5 kgZl and 5 mm in easy peel strength. Become. Therefore, separation of the seal layer can be easily performed.
- the laminate of the present invention is molded and used as a container, and the lid to be sealed with the lid material is opened between the layers (A) and (B), and must be easily openable. Therefore
- the delamination strength between (A) and (B) must be 0.2 to 2.5 kgZl 5 mm (at a tensile speed of 30 OmmZ), and in order to ensure smooth separation at this time, (B) (C The delamination strength between) must also be taken into account.
- delamination strength between (B) and (C) is lower than the delamination strength between (A) and (B), delamination may occur between (B) and (C), and the opening is not stable. Therefore, to open easily (A)
- the delamination strength between (B) and (B) must be lower than the delamination strength between (C). For this reason, it is necessary to adjust the strength by changing the Ml of the PP used in (A) and (C). That is, the present inventor has found that this relationship holds when the Ml of the PP in (A) is 1.1 times or more as large as the Ml of the PP in (C).
- the layer of the lid material and the innermost layer (A) must be firmly adhered, and the material of the sealing layer of the lid material is usually the same or the same as the material of the innermost layer (A). Is used.
- the thickness of the innermost layer (A) is preferably in the range of 5 to 100 °. If it is less than 5 mm, the sealing property may be impaired.
- Tables 1 and 3 show the constituent resins and layer thicknesses of the laminates of Examples and Comparative Examples
- Tables 2 and 4 show the lamination distance between the eyebrows before and after heating between (A) and (B), the interlayer separation strength before and after heating between (B) and (C), and the laminates of Examples and Comparative Examples. It shows the sterilization suitability, internal pressure resistance, heat resistance, and openability of the container made by using it.
- a D Carboxylic anhydride modified polypropylene
- HDPE High density polyethylene
- Modified PP Polyurethane modified polypropylene
- the interlayer separation strength between (A) and (B) and between (B) and (C) of the laminate was measured. Pulling speed 300 mm / min. (180 degrees apart)
- the laminate is left at 135 ° C for 1 hour under dry heat conditions.
- round containers having a diameter of 65 mm0, a height of 25 mm, and a capacity of 70 cc were formed by vacuum forming.
- the container was filled with 90% of water, and sealed with a lid film having a four-layer structure of PET / aluminum foil / PETZPP with a thickness of 100 ⁇ m by a heat sealing method. Then pressurized 1 3 0
- Sterilization was performed using 10 samples in hot water at ° C, and after the sterilization was completed, the presence or absence of water leakage was examined by visual inspection.
- the fractional numerator is the number of leaks
- the denominator is the total number of samples.
- the sample without water leakage after sterilization was injected from the lid material side to prevent the compressed air from leaking, and the pressure when the sealing was released was measured.
- the container used for sterilization was filled with 90% vegetable oil and heated for 2 minutes with a 500 W output electronic razor. After the heating was completed, the external appearance of the container was observed. If the container was deformed, it was judged to be defective, and if it was not deformed, it was judged to be good.
- the laminate of the present invention can stably control the easy opening property and the sealing property after the high temperature treatment. Further, the easily-openable container obtained from this laminate has excellent sealing and opening properties, and its practical value is great.
- the present invention can be applied to an easily openable container excellent in hermeticity, openability, preservability of container contents, and container productivity for storing, packaging, preserving, and transporting food and medicine. It is a useful laminate.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Package Specialized In Special Use (AREA)
- Packages (AREA)
- Wrappers (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE69604828T DE69604828T2 (de) | 1995-06-30 | 1996-06-28 | Laminat |
US08/973,196 US5976651A (en) | 1995-06-30 | 1996-06-28 | Propylene packaging laminate comprising methylpentene resin blend layer |
EP96921112A EP0870603B1 (en) | 1995-06-30 | 1996-06-28 | Laminate |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7166495A JP2978086B2 (ja) | 1995-06-30 | 1995-06-30 | 積層体 |
JP7/166495 | 1995-06-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997002141A1 true WO1997002141A1 (fr) | 1997-01-23 |
Family
ID=15832434
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1996/001793 WO1997002141A1 (fr) | 1995-06-30 | 1996-06-28 | Stratifie |
Country Status (5)
Country | Link |
---|---|
US (1) | US5976651A (ja) |
EP (1) | EP0870603B1 (ja) |
JP (1) | JP2978086B2 (ja) |
DE (1) | DE69604828T2 (ja) |
WO (1) | WO1997002141A1 (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6265083B1 (en) * | 1997-08-22 | 2001-07-24 | Mitsui Chemicals, Inc. | Poly (4-methyl-1-pentene) resin laminates and uses thereof |
US20060141241A1 (en) * | 2004-12-23 | 2006-06-29 | Carespodi Dennis L | Peelable breakaway multi-layered structures and methods and compositions for making such structures |
US7281360B1 (en) | 2005-02-11 | 2007-10-16 | Bryce Corporation | Thermal laminates and laminating method of food packaging films |
JP6753557B1 (ja) * | 2019-02-07 | 2020-09-09 | 日本製鉄株式会社 | 樹脂金属複合容器用樹脂ラミネート鋼板製缶蓋、樹脂金属複合容器用樹脂ラミネート鋼板製缶底、及び樹脂金属複合容器 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH072409B2 (ja) * | 1989-11-02 | 1995-01-18 | 出光石油化学株式会社 | 多層構造物及び易開封性容器 |
JPH08230120A (ja) * | 1995-02-28 | 1996-09-10 | Sumitomo Bakelite Co Ltd | 積層体 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2063278B (en) * | 1978-10-04 | 1983-01-12 | Asahi Dow Ltd | Composition for production of cold drawn film |
JPH0615227B2 (ja) * | 1985-06-05 | 1994-03-02 | 出光石油化学株式会社 | 樹脂積層体 |
US5407751A (en) * | 1985-11-29 | 1995-04-18 | American National Can Company | Easy peel film structure especially for retortable lidstock |
US5011719A (en) * | 1985-11-29 | 1991-04-30 | American National Can Company | Polymeric compositions and films |
US5178293A (en) * | 1986-04-08 | 1993-01-12 | Idemitsu Petrochemical Co., Ltd. | Easily-openable packaging container |
CA1303522C (en) * | 1986-04-08 | 1992-06-16 | Takanori Suzuki | Easily-openable packaging container |
US5160767A (en) * | 1987-04-30 | 1992-11-03 | American National Can Company | Peelable packaging and sheet materials and compositions for use therein |
JPH0729405B2 (ja) * | 1987-05-28 | 1995-04-05 | 三井石油化学工業株式会社 | 積層フイルム |
US5061532A (en) * | 1988-04-20 | 1991-10-29 | Idemitsu Petrochemical, Co., Ltd. | Multilayer structure and easily openable container and lid |
JP2592500B2 (ja) * | 1988-06-01 | 1997-03-19 | 三井石油化学工業株式会社 | 積層フィルム |
JPH0717756B2 (ja) * | 1988-06-30 | 1995-03-01 | 日本石油株式会社 | 熱可塑性樹脂改質用マスターバッチ組成物の製造方法 |
JP2619034B2 (ja) * | 1988-12-28 | 1997-06-11 | 三井石油化学工業株式会社 | 積層体からなる離型フィルム |
FR2653097B1 (fr) * | 1989-10-18 | 1992-04-03 | Siamp Cedap Reunies | Feuille multicouche en matiere plastique pour constituer des recipients destines a etre fermes par un opercule soude, et recipients formes a partir de cette feuille. |
DE3940173A1 (de) * | 1989-12-05 | 1991-06-06 | Hoechst Ag | Beidseitig siegelbare, biaxial orientierte polyolefin-mehrschichtfolie, ihre herstellung und ihre verwendung |
US5066543A (en) * | 1990-02-28 | 1991-11-19 | Shell Oil Company | Film, sheet and laminate capable of forming easy-open packagings |
DE59207030D1 (de) * | 1991-05-28 | 1996-10-10 | Hoechst Ag | Siegelbare, opake, biaxial orientierte Polypropylen-Mehrschichtfolie, Verfahren zu ihrer Herstellung und ihre Verwendung |
US5302442A (en) * | 1992-03-09 | 1994-04-12 | Mobil Oil Corporation | Heat sealable base films |
GB2280129A (en) * | 1993-07-21 | 1995-01-25 | Mobil Plastics Europ Inc | Peelable film |
DE4307441A1 (de) * | 1993-03-10 | 1994-09-15 | Wolff Walsrode Ag | Mehrschichtige, gereckte, heißsiegelbare, hochgleitfähige Polypropylenfolie mit verbesserten Barriereeigenschaften |
DE4311950A1 (de) * | 1993-04-10 | 1994-10-13 | Hoechst Ag | Opake, matte Polypropylen-Mehrschichtfolie, Verfahren zu ihrer Herstellung und ihre Verwendung |
JP3106139B2 (ja) * | 1993-04-27 | 2000-11-06 | サン−ゴバン パフォーマンス プラスティックスコーポレイション | 剥離性の優れたポリメチルペンテンとポリプロピレンの組成物及びそのフィルムの製造法 |
GB2296466B (en) * | 1994-12-23 | 1998-02-04 | Courtaulds Films | Polymeric films |
WO1996028507A1 (fr) * | 1995-03-13 | 1996-09-19 | Mitsui Petrochemical Industries, Ltd. | Complexe polymere de 4-methyl-1-penthene |
US5755081A (en) * | 1997-01-31 | 1998-05-26 | W. R. Grace & Co.-Conn. | Heat-sealable, multilayer film containing therein a colorant and method for making a package with such film |
-
1995
- 1995-06-30 JP JP7166495A patent/JP2978086B2/ja not_active Expired - Fee Related
-
1996
- 1996-06-28 DE DE69604828T patent/DE69604828T2/de not_active Expired - Lifetime
- 1996-06-28 EP EP96921112A patent/EP0870603B1/en not_active Expired - Lifetime
- 1996-06-28 WO PCT/JP1996/001793 patent/WO1997002141A1/ja active IP Right Grant
- 1996-06-28 US US08/973,196 patent/US5976651A/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH072409B2 (ja) * | 1989-11-02 | 1995-01-18 | 出光石油化学株式会社 | 多層構造物及び易開封性容器 |
JPH08230120A (ja) * | 1995-02-28 | 1996-09-10 | Sumitomo Bakelite Co Ltd | 積層体 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0870603A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP0870603A1 (en) | 1998-10-14 |
DE69604828D1 (de) | 1999-11-25 |
DE69604828T2 (de) | 2000-06-15 |
EP0870603B1 (en) | 1999-10-20 |
US5976651A (en) | 1999-11-02 |
JP2978086B2 (ja) | 1999-11-15 |
EP0870603A4 (ja) | 1998-10-14 |
JPH0911417A (ja) | 1997-01-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5394096B2 (ja) | イージーピールフィルム | |
JP2018516182A (ja) | 滅菌プロセス用または殺菌プロセス用の多重フィルム | |
JP2965825B2 (ja) | 多層構造物及び易開封性容器 | |
USH1727H (en) | Heat sealable packaging materials having a peelable, easy-opening feature | |
AU2012281624A1 (en) | Plastic film and infusion solution bag | |
JP6318737B2 (ja) | ボイル処理用食品包装フィルム、深絞り包装体用底材、および深絞り包装体 | |
EP3858613A1 (en) | Oven skin packaging film | |
WO1997002141A1 (fr) | Stratifie | |
US20180079577A1 (en) | Heat-Resistant Easy-Open Package | |
JPH09221177A (ja) | 電子レンジ調理用包装容器 | |
JP3035191B2 (ja) | 積層体 | |
JP3124206B2 (ja) | 積層体 | |
JP3054063B2 (ja) | 積層体 | |
JP3543456B2 (ja) | イージーピールシール用フィルムおよび容器 | |
JP3043598B2 (ja) | 積層体 | |
JP3085642B2 (ja) | 積層体 | |
JP3629497B2 (ja) | 多層シート及び易開封容器 | |
JP3020836B2 (ja) | 積層体 | |
JP2589371B2 (ja) | 多層構造物、易開封性容器及び蓋材 | |
WO2023084953A1 (ja) | 紙層を含む積層体、及びチューブ容器 | |
JP2022099857A (ja) | 易開封性共押出フィルム | |
JPH072409B2 (ja) | 多層構造物及び易開封性容器 | |
JP3780075B2 (ja) | 耐熱容器用易開封性複合フイルム | |
JPH04144744A (ja) | 多層シート類及び易開封性容器 | |
JP2000016455A (ja) | 易開封性容器 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 08973196 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1996921112 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1996921112 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996921112 Country of ref document: EP |