EP0179639A2
Expired / Lapsed
EP
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Multilayer plastic articles
Assignee: OI Glass Inc
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Filing: 1985-10-21
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Granted: —
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Expires: 2005-10-21
Abstract
Abstract The present invention provides a multilayer plastics structure characterised by a laminate of at least one layer of a high gas barrier polymer and at least one layer of a blend of at least one propylene based polymer and at least one linear low density polyethylene wherein the total amount of the linear low density polyethylene is equal to or less than about 30 percent by weight of the blend. Such structures may be formed into containers.
Inventors
- 👤 Saleh Abd-El-Karim Jabarin
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 01:48
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/32; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B7/00; B32B7/04; B32B7/12; C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L23/14; C08L23/142; B32B2270/00; B32B2272/00; B32B2323/00; B32B2323/04; B32B2323/046; B32B2323/10; B32B2439/00; C08L23/04; C08L23/06; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1341; Y10T428/1352; Y10T428/1379; Y10T428/1383; Y10T428/24; Y10T428/24942; Y10T428/24992; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
66 words
A multilayer plastics structure characterised by a laminate of at least one layer of a high gas barrier polymer and at least one layer of a blend of at least one propylene based polymer and at least one linear low density polyethylene wherein the total amount of the linear low density polyethylene is equal to or less than about 30 percent by weight of the blend.
Claim 2
Dependent Claim
66 words
A multilayer plastics structure characterised by a laminate of at least one layer of a high gas barrier polymer and at least one layer of a blend of at least one propylene based polymer and at least one linear low density polyethylene wherein the total amount of the linear low density polyethylene is equal to or less than about 30 percent by weight of the blend.
Claim 3
Dependent Claim
81 words
A multilayer plastics structure characterised by a laminate of a pair of outer layers and a centrally located core layer wherein the centrally located core layer includes at least one high gas barrier polymer and the outer layers are each a blend of at least one propylene based polymer and at least one linear low density polyethylene with the total amount of the linear low density polyethylene being equal to or less than about 30 percent by weight of the blend.
Claim 4
Dependent Claim
81 words
A multilayer plastics structure characterised by a laminate of a pair of outer layers and a centrally located core layer wherein the centrally located core layer includes at least one high gas barrier polymer and the outer layers are each a blend of at least one propylene based polymer and at least one linear low density polyethylene with the total amount of the linear low density polyethylene being equal to or less than about 30 percent by weight of the blend.
Claim 5
Dependent Claim
103 words
A multilayer plastics structure characterised by a laminate of a pair of outer layers, a pair of intermediate adhesive layers and a centrally located core layer wherein the outer layers are formed from a blend of at least one propylene based polymer and at least one linear low density polyethylene wherein the total amount of the linear low density polyethylene is equal to or less than about 30 percent by weight of the blend; the intermediate adhesive layers are formed from at least one olefinic hydrocarbon polymer; and the centrally located core layer is formed from at least one high gas barrier polymer.
Claim 6
Dependent Claim
103 words
A multilayer plastics structure characterised by a laminate of a pair of outer layers, a pair of intermediate adhesive layers and a centrally located core layer wherein the outer layers are formed from a blend of at least one propylene based polymer and at least one linear low density polyethylene wherein the total amount of the linear low density polyethylene is equal to or less than about 30 percent by weight of the blend; the intermediate adhesive layers are formed from at least one olefinic hydrocarbon polymer; and the centrally located core layer is formed from at least one high gas barrier polymer.
Claim 7
Dependent Claim
18 words
A structure according to any of claims 1 to 3, wherein the propylene based polymer is polypropylene homopolymer.
Claim 8
Dependent Claim
31 words
A structure according to any of claims 1 to 3, wherein the propylene based polymer is a propylene-ethylene copolymer including about 2 to 5 mole percent ethylene copolymerized with the propylene.
Claim 9
Dependent Claim
41 words
A structure according to any of claims 1 to 5, wherein the linear low density polyethylene has a density of less than about 0.93 grams per cubic centimetre and a melt index of less than about 10 grams per ten minutes.
Claim 10
Dependent Claim
33 words
A structure according to claim 6, wherein the linear low density polyethylene has a density of about 0.92 grams per cubic centimetre and a melt index of less than about 2 grams/10 minutes.
Claim 11
Dependent Claim
28 words
A structure according to any of claims 1 to 7, wherein the linear low density polyethylene is equal to about 20 percent by weight of the said blend.
Claim 12
Dependent Claim
21 words
A structure according to any of claims 1 to 8, wherein the high gas barrier polymer is an ethylene-vinyl alcohol copolymer.
Claim 13
Dependent Claim
14 words
A container formed from the structure according to any of claims 1 to 9.
Claim 14
Dependent Claim
47 words
A composition characterised by a blend of a propylene based polymer which is a copolymer of ethylene and propylene, and a linear, low density polyethylene wherein the total amount of the linear low density polyethylene is no more than about 20 percent by weight of the blend.
Claim 15
Dependent Claim
47 words
A composition characterised by a blend of a propylene based polymer which is a copolymer of ethylene and propylene, and a linear, low density polyethylene wherein the total amount of the linear low density polyethylene is no more than about 20 percent by weight of the blend.
Claim 16
Dependent Claim
38 words
A composition according to claim 11, wherein the propylene based polymer is a propylene-ethylene copolymer including about 2 to 5 mole percent ethylene copolymerized with the propylene, the copolymer being about 20 weight per cent of the blend.
Claim 17
Dependent Claim
25 words
A composition according to claim 11, wherein the copolymer is about 2 to 4 mole percent ethylene and 96 to 98 mole per cent polypropylene.
Claim 18
Dependent Claim
41 words
A composition according to any of claims 11 to 13, wherein the linear low density polyethylene has a density of less than about 0.93 grams per cubic centimetre and a melt index of less than about 10 grams per ten minutes.
Claim 19
Dependent Claim
33 words
A composition according to claim 14, wherein the linear low density polyethylene has a density of about 0.92 grams per cubic centimetre and a melt index of less than about 2 grams/10 minutes.
Claim 20
Dependent Claim
53 words
A composition according to any of claims 11 to 15, wherein the linear low density polyethylene is equal to about 20 percent by weight of the blend and the copolymer has a density of about 0.89 to 0.9 grams per cubic centimetre and a melt index of less than about 30 grams/10 min.
References Cited (Backward Citations)
No citation records indexed.
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