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Patent US4357383A successfully refreshed from Google Patents.
US4357383A
Expired / Lapsed
US
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Metallized films
Assignee: UCB SA
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Filing: 1980-07-07
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Granted: 1982-11-02
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Expires: 2000-07-07
Abstract
Abstract The invention provides a multiple-layer metallized film comprising a substrate layer of a polymer or copolymer of an alpha-olefin, the molecule of which contains from 2 to 6 carbon atoms, having on at least one surface thereof an adherent layer comprising a random copolymer of ethylene with from 0.5 to 15 wt % of a 3 to 6 carbon alpha-mono-olefin, and a metallic layer on the surface of the adherent layer remote from the substrate. Improved adhesion between the metallized and substrate layers is thereby achieved, and the multi-layer film is suitable for packaging a variety of edible products.
Inventors
- 👤 Martin E. Howden
- 👤 Robert C. Lansbury
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:50
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/08; B32B27/32; B32B27/322; B32B38/00; B32B38/0012; B32B2038/0028; B32B2255/00; B32B2255/20; B32B2255/205; B32B2272/00; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/518; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/24992; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855; Y10T428/31909; Y10T428/31913
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
A multiple-layer metallised packaging film of total thickness between 2.5 and 150 microns said film comprising a substrate layer of a polymer or copolymer of an alpha-olefin, the molecule of which contains from 2 to 6 carbon atoms, having on at least one surface thereof an adherent layer comprising a random copolymer of ethylene with from 0.25 to 15% by weight of the copolymer of an alpha-mono-olefin containing from 3 to 6 carbon atoms in its molecule, and a metallic layer on the surface of said adherent layer remote from the substrate, said metallic layer having a thickness of from monoatomic proportions to 50 microns.
Claim 2
Dependent Claim
105 words
A multiple-layer metallised packaging film of total thickness between 2.5 and 150 microns said film comprising a substrate layer of a polymer or copolymer of an alpha-olefin, the molecule of which contains from 2 to 6 carbon atoms, having on at least one surface thereof an adherent layer comprising a random copolymer of ethylene with from 0.25 to 15% by weight of the copolymer of an alpha-mono-olefin containing from 3 to 6 carbon atoms in its molecule, and a metallic layer on the surface of said adherent layer remote from the substrate, said metallic layer having a thickness of from monoatomic proportions to 50 microns.
Claim 3
Dependent Claim
15 words
A film according to claim 1 wherein the adherent layer comprises a random ethylene-butene-1 copolymer.
Claim 4
Dependent Claim
23 words
A film according to claim 1 wherein the density of the ethylene copolymer is from 0.910 to 0.980 g/cm 3 at 23° C.
Claim 5
Dependent Claim
30 words
A film according to claim 1 wherein the ethylene copolymer has a melt flow index, measured in accordance with ASTM/D 1238-65T (condition E), of from 1.5 to 10.0 g/10 minutes.
Claim 6
Dependent Claim
36 words
A film according to claim 1 wherein the ethylene copolymer has a ratio Mw:Mn of from 3:1 to 5:1 wherein Mw and Mn are respectively the weight and number average molecular weights of said ethylene copolymer.
Claim 7
Dependent Claim
31 words
A film according to claim 1 wherein said adherent layer additionally comprises an olefin copolymer a substantial proportion of which melts in a temperature range of from 115° to 130° C.
Claim 8
Dependent Claim
12 words
A film according to claim 1 wherein the metallic layer is aluminium.
Claim 9
Dependent Claim
12 words
A film according to claim 1 wherein the substrate is biaxially oriented.
Claim 10
Dependent Claim
15 words
A film according to claim 1 wherein the metallic layer is a vacuum metallised layer.
Claim 11
Dependent Claim
25 words
A film according to claim 1 wherein the adherent copolymer layer is exposed to a corona discharge treatment prior to application of the metallic layer.
References Cited (Backward Citations)
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CA875949A
Cited
GB1440317A
Cited
US4172912A
Cited
US4105820A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-01 | 1986-05-03 | 1986-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-01 | 1990-05-03 | 1990-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-01 | 1994-05-03 | 1994-11-02 | $7700.00 | Window Closed / Lapsed |