US4842952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inter-ply adhesion between saran and linear ethylene copolymers
Assignee: Cryovac LLC
•
Filing: 1988-03-31
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Granted: 1989-06-27
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Expires: 2008-03-31
Abstract
Abstract A multilayer 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 weight percent of ethylene/butyl-acrylate copolymer having a melting point of about 110° C. blended with about 95-60 weight percent of linear ethylene/alpha-olefin copolymer.
Inventors
- 👤 Steven B. Garland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:27
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31935
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
A multi-layer film comprising: (a) a blended layer comprising ethylene/butyl acrylate copolymer blended with linear ethylene/alpha-olefin copolymer; and (b) a layer comprising vinylidene chloride copolymer having one surface thereof directly joined to the blended layer.
Claim 2
Dependent Claim
35 words
A multi-layer film comprising: (a) a blended layer comprising ethylene/butyl acrylate copolymer blended with linear ethylene/alpha-olefin copolymer; and (b) a layer comprising vinylidene chloride copolymer having one surface thereof directly joined to the blended layer.
Claim 3
Dependent Claim
25 words
The film of claim 17 wherein the butyl acrylate content of the ethylene/butyl acrylate is in the range of about 2% to 18% by weight.
Claim 4
Dependent Claim
34 words
The film of claim 17 wherein the vinylidene chloride copolymer layer (b) is joined, on its surface opposite the surface joined to the blended layer (a), to a layer (c) comprising ethylene/vinyl acetate copolymer.
Claim 5
Dependent Claim
36 words
The film of claim 19 wherein the ethylene/vinyl acetate copolymer layer (c) is joined, on its surface opposite the surface joined to the vinylidene chloride layer (b), to a layer (d) comprising ethylene vinyl acetate copolymer.
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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) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |