US4755436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inter-ply adhesion between saran and linear ethylene copolymers
Assignee: Cryovac LLC
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Filing: 1986-06-30
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Granted: 1988-07-05
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Expires: 2006-06-30
Abstract
Abstract A multi-layer film is disclosed having improved adhesion between layers and consisting essentially of the following elements: (a) a layer consisting essentially of vinylidene chloride copolymer; and, (b) a layer consisting essentially of about 5-40 wt. % of ethylene/butyl-acrylate copolymer having a melting point of about 110° C. blended with about 95-60 wt. % of linear ethylene/alpha-olefin copolymer.
Inventors
- 👤 Steven B. Garland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:45
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
72 words
A multi-layer film having improved adhesion between layers consisting essentially of : (a) a layer consisting essentially of vinylidene chloride copolymer; and, (b) a blended layer directly joined to the vinylidene chloride copolymer layer, said blended layer consisting essentially of about 5% to about 40% by weight of ethylene/butyl-acrylate copolymer having a melting point of about 110° C. blended with about 95% to about 60% by weight of linear ethylene/ alpha-olefin copolymer.
Claim 2
Dependent Claim
72 words
A multi-layer film having improved adhesion between layers consisting essentially of : (a) a layer consisting essentially of vinylidene chloride copolymer; and, (b) a blended layer directly joined to the vinylidene chloride copolymer layer, said blended layer consisting essentially of about 5% to about 40% by weight of ethylene/butyl-acrylate copolymer having a melting point of about 110° C. blended with about 95% to about 60% by weight of linear ethylene/ alpha-olefin copolymer.
Claim 3
Dependent Claim
19 words
The film of claim 1 wherein the linear ethylene/alpha-olefin copolymer has a density of less than about 0.920 gms/cc.
Claim 4
Dependent Claim
25 words
The film of claim 1 wherein the butyl acrylate content of the ethylene/butyl-acrylate is in the range of about 2% to about 6% by weight.
Claim 5
Dependent Claim
89 words
A multi-layer film having improved adhesion between layers comprising: (a) a layer comprising vinylidene chloride copolymer; (b) a blended layer directly joined to the vinylidene chloride copolymer layer, said blended layer comprising about 5% to about 40% by weight of ethylene/butyl-acrylate copolymer blended with about 95% to about 60% by weight of linear ethylene/alpha-olefin copolymer, and (c) wherein the vinylidene chloride copolymer layer is joined, on its surface opposite the surface joined to the blended layer, to a layer consisting essentially of ethylene/butyl-acrylate copolymers with ethylene polymers or copolymers.
Claim 6
Dependent Claim
89 words
A multi-layer film having improved adhesion between layers comprising: (a) a layer comprising vinylidene chloride copolymer; (b) a blended layer directly joined to the vinylidene chloride copolymer layer, said blended layer comprising about 5% to about 40% by weight of ethylene/butyl-acrylate copolymer blended with about 95% to about 60% by weight of linear ethylene/alpha-olefin copolymer, and (c) wherein the vinylidene chloride copolymer layer is joined, on its surface opposite the surface joined to the blended layer, to a layer consisting essentially of ethylene/butyl-acrylate copolymers with ethylene polymers or copolymers.
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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) | 1991-07-05 | 1992-01-04 | 1992-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-05 | 1996-01-04 | 1996-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-05 | 2000-01-04 | 2000-07-05 | $7700.00 | Window Closed / Lapsed |