EP0132565A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Oriented film laminates of polyamides and ethylene vinyl alcohol
Assignee: Honeywell International Inc
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Filing: 1984-06-12
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Granted: —
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Expires: 2004-06-12
Abstract
Abstract The present invention is a film laminate comprising a polyamide layer, preferably polyepsilocaprolactam, and a layer of ethylene vinyl alcohol copolymer. The polyamide layer and ethylene vinyl alcohol copolymar layer are preferably adjacent layers. The laminate is expanded to an area of less than 4 times the original area. Preferably, the laminate is drawn to a draw ratio of from 1.5:1 to 4:1 in at least one direction. Preferred laminates have outer layers of polyepsiloncaprolactam and at least one inner layer of ethylene vinyl alcohol copolymer adjacent to at least one layer of polyepsiloncaprolactam. Preferably, the laminate is a multilayer coextrusion.
Inventors
- 👤 Ferdinand Anthony Deantonis
- 👤 William Henry Murell
- 👤 Alfieri Degrassi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 16:27
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/306; B32B27/34; B32B38/00; B32B38/0036; B32B38/004; B32B38/06; B32B7/00; B32B7/04; B32B7/12; B32B38/0012; B32B2038/0028; B32B2038/0052; B32B2038/0088; B32B2270/00; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/516; B32B2307/70; B32B2307/724; B32B2307/7242; B32B2307/7244; B32B2309/00; B32B2309/02; B32B2309/022; B32B2309/14; B32B2377/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
33 words
A film laminate comprising a polyamide layer and a layer of ethylene vinyl alcohol copolymer wherein the laminate is expanded to an area of up to less than 4 times the original area.
Claim 2
Dependent Claim
33 words
A film laminate comprising a polyamide layer and a layer of ethylene vinyl alcohol copolymer wherein the laminate is expanded to an area of up to less than 4 times the original area.
Claim 3
Dependent Claim
20 words
The film laminate as recited in claim 1 wherein the ethylene vinyl alcohol layer is adjacent to the polyamide layer.
Claim 4
Dependent Claim
25 words
The film laminate of claim 1 wherein the laminate is drawn to a draw ratio of from 1:5 to 4:1 in at least one direction.
Claim 5
Dependent Claim
14 words
The film laminate as recited in claim 3 wherein the laminate is biaxially oriented.
Claim 6
Dependent Claim
13 words
The film laminate as recited in claim 3 wherein the polyamide is polyepsiloncaprolactam.
Claim 7
Dependent Claim
38 words
The film laminate as recited in claim 1 further comprising a layer comprising a blend of the polyamide and the ethylene vinyl alcohol copolymer interposed between the layer of ethylene vinyl alcohol copolymer and the layer of polyamide.
Claim 8
Dependent Claim
15 words
The film laminate as recited in claim 1 wherein the laminate is a coextruded laminate.
Claim 9
Dependent Claim
14 words
The film laminate as recited in claim 1 wherein the film laminate is embossed.
Claim 10
Independent Claim
47 words
A method of improving the barrier properties of a film laminate comprising at least one layer of polyamide and at least one layer of ethylene vinyl alcohol copolymer comprising the step of expanding the area of the laminate up to less than 4 times the original area.
Claim 11
Independent Claim
47 words
A method of improving the barrier properties of a film laminate comprising at least one layer of polyamide and at least one layer of ethylene vinyl alcohol copolymer comprising the step of expanding the area of the laminate up to less than 4 times the original area.
Claim 12
Independent Claim
67 words
A method of improving the barrier properties of a film laminate comprising at least one layer of polyamide and at least one layer of ethylene vinyl alcohol copolymer comprising the step of laminating at least one layer of polyamide and at least one layer of ethylene vinyl alcohol copolymer, comprising drawing the laminate to a draw ratio of from 1.5:1 to 4:1 in at least one direction.
Claim 13
Independent Claim
67 words
A method of improving the barrier properties of a film laminate comprising at least one layer of polyamide and at least one layer of ethylene vinyl alcohol copolymer comprising the step of laminating at least one layer of polyamide and at least one layer of ethylene vinyl alcohol copolymer, comprising drawing the laminate to a draw ratio of from 1.5:1 to 4:1 in at least one direction.
References Cited (Backward Citations)
No citation records indexed.
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