Patent EP0151462A2 successfully refreshed from Google Patents.
EP0151462A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Gas barrier multilayer packaging material having excellent flexing endurance
Assignee: Kuraray Co Ltd
•
Filing: 1985-01-30
•
Granted: —
•
Expires: 2005-01-30
Abstract
Abstract A gas barrier multilayer packaging material having excellent flexing endurance, which comprises a thin layer of a saponified product of an ethylene-vinyl acetate copolymer as an intermediate layer and linear low-density polyethylene layers as inner and outer layers. This packaging material is especially useful as inner containers for a bag-in-box or bag-in-carton.
Inventors
- 👤 Yasuo Motoishi
- 👤 Kenji Satoh
- 👤 Kyoichiro Ikari
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 09:47
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/30; B32B27/306; B32B7/00; B32B7/04; B32B7/12; B65; B65D; B65D77/00; B65D77/04; B65D77/06; B65D77/062; B32B2307/00; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2323/00; B32B2323/04; B32B2323/046; B32B2439/00; B32B2439/40; B32B2439/62; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31928
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
1 . A gas barrier multilayer packaging material having excellent flexing endurance which comprises a thin layer of a saponifiec product of an ethylene-vinyl acetate copolymer as an intermediate lay e: and surface layers on both sides of said intermediate layer, said a respective layers being arranged via an adhesive resin layer, which is characterized in that both of said surface layers are composed of linear low-density polyethylene layers.
Claim 2
Dependent Claim
69 words
1 . A gas barrier multilayer packaging material having excellent flexing endurance which comprises a thin layer of a saponifiec product of an ethylene-vinyl acetate copolymer as an intermediate lay e: and surface layers on both sides of said intermediate layer, said a respective layers being arranged via an adhesive resin layer, which is characterized in that both of said surface layers are composed of linear low-density polyethylene layers.
Claim 3
Dependent Claim
30 words
2 . The multilayer packaging material according to Claim 1 wherein the linear low-density polyethylene is that using an α-olefin of 4 or more carbon atoms as a copolymerizable component.
Claim 4
Dependent Claim
35 words
3 . The multilayer packaging material according to Claim 1 wherein the heat of fusion of the linear low-density polyethylene as measured by thermal analysis by a differential scanning calorimeter is 25 cal/g or less.
Claim 5
Dependent Claim
40 words
4 . The multilayer packaging material according to Claim 1 wherein the linear low-density polyethylene uses butene-1 as a copolymerizable component and has a heat of fusion by thermal analysis by a differential scanning calorimeter of 15 cal/g or less.
Claim 6
Dependent Claim
27 words
5 . The multilayer packaging material according to Claim 1 wherein the Young's modulus at 20°C of the linear low-density polyethylene is 22 kg/mm 2 or less.
Claim 7
Dependent Claim
30 words
The multilayer packaging material according to Claim 1 wherein the linear low-density polyethylene uses butene-1 as a copolymerizable component and has Young's modulus at 20°C of 12 kg/mm2 or less.
Claim 8
Dependent Claim
30 words
7 . The multilayer packaging material according to Claim 1 wherein the linear low-density polyethylene is that using an α-olefin of 5 or more carbon atoms as a copolymerizable component.
Claim 9
Dependent Claim
23 words
8 . The multilayer packaging material according to Claim 1 wherein the linear low-density polyethylene is that using 4-methyl-l-pentene as a copolymerizable component.
Claim 10
Dependent Claim
37 words
The multilayer packaging material according to Claim 1 wherein the adhesive resin is a modified olefinic polymer containing carboxyl groups obtained by chemically combining an ethylenically unsaturated carboxylic acid or its anhydride with the olefinic polymer. 1
Claim 11
Dependent Claim
41 words
The multilayer packaging material according to Claim 9 wherein the modified olefinic polymer containing carboxyl groups is that obtained by chemically combining 0.01 - 15 % by weight of an ethylenically unsaturated carboxylic acid or its anhydride with the olefinic polymer.
Claim 12
Dependent Claim
19 words
The multilayer packaging material according to Claim 9 wherein the olefinic polymer is an ethylene - vinyl acetate copolymer.
Claim 13
Dependent Claim
29 words
The multilayer packaging material according to Claim 9 wherein the olefinic polymer is an ethylene - vinyl acetate copolymer containing 5 - 55% by weight of the vinyl acetate.
Claim 14
Dependent Claim
19 words
The multilayer packaging material according to Claim 9 wherein the olefinic polymer is an ethylene - ethyl acrylate compolymer.
Claim 15
Dependent Claim
29 words
The multilayer packaging material according to Claim 13 wherein the olefinic polymer is an ethylene - ethyl acrylate copolymer containing 8 - 35% by weight of the ethyl acrylate.
Claim 16
Dependent Claim
40 words
15 . The multilayer packaging material according to Claim 1 wherein the saponified product of an ethylene-vinyl acetate copolymer has an ethylene content of 20 - 60 mole % and a degree of saponification of 95 mole % or more.
Claim 17
Dependent Claim
61 words
The multilayer packaging material according to Claim 1 wherein the thickness of the intermediate layer composed of the saponified product of an ethylene-vinyl acetate copolymer is 2 - 20 µ, the thickness of each of the surface layers on both sides is 10 - 60 µ and the thickness of each of the adhesive resin layers is 2 - 10 µ.
Claim 18
Dependent Claim
21 words
The multilayer packaging material according to Claim 1 which is a constituting material for inner containers for a bag-in-box or bag-in-carton.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.