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US5019447A
Expired / Lapsed
US
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Oriented polypropylene film structure
Assignee: Mobil Oil AS
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Filing: 1989-12-12
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Granted: 1991-05-28
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Expires: 2009-12-12
Abstract
Abstract An oriented polypropylene film structure comprises an oriented polypropylene base layer and a layer of a vinylidene chloride polymer on at least one surface of the base layer or on an intermediate layer, the vinylidene chloride polymer layer being substantially free of migratable emulsifier. A metal layer is provided directly on the vinylidene chloride polymer layer.
Inventors
- 👤 Lajos E. Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:32
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B15/00; B32B15/04; B32B15/08; B32B15/082; B32B27/30; B32B27/304; B32B27/32; B32B2255/00; B32B2255/10; B32B2255/20; B32B2255/205; B32B2307/00; B32B2307/40; B32B2307/41; B32B2307/50; B32B2307/514; B32B2323/00; B32B2323/10; B32B2327/00; B32B2327/06; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/254; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31786; Y10T428/31797; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
In an oriented polypropylene film structure which comprises an oriented propylene polymer base layer, a layer of a vinyidene chloride polymer on at least one surface of the base layer and a metal layer applied directly to the vinylidene chloride polymer layer, the improvement comprising employing a vinylidene chloride polymer layer which contains less than 0.3% by weight of migratable emulsifier such that the gloss of the metal layer and the adhesion of the metal layer to vinylidene chloride polymer are improved as compared to those obtained with a vinylidene chloride polymer layer containing more than 0.3% by weight of migratable emulsifier.
Claim 2
Dependent Claim
102 words
In an oriented polypropylene film structure which comprises an oriented propylene polymer base layer, a layer of a vinyidene chloride polymer on at least one surface of the base layer and a metal layer applied directly to the vinylidene chloride polymer layer, the improvement comprising employing a vinylidene chloride polymer layer which contains less than 0.3% by weight of migratable emulsifier such that the gloss of the metal layer and the adhesion of the metal layer to vinylidene chloride polymer are improved as compared to those obtained with a vinylidene chloride polymer layer containing more than 0.3% by weight of migratable emulsifier.
Claim 3
Dependent Claim
34 words
A film structure as claimed in claim 1 wherein the amount of migratable emulsifier, if any, that is present in the vinylidene chloride polymer layer is less than 0.1% by weight of said layer.
Claim 4
Dependent Claim
30 words
A film structure as claimed in claim 1, wherein the vinylidene chloride polymer layer is applied from a latex containing a sulfoalkyl ester of an alpha-beta ethylenically unsaturated carboxylic acid.
Claim 5
Dependent Claim
23 words
A film structure as claimed in claim 1 wherein the latex also contains a hydroxyalkyl ester of an alpha-beta ethylenically unsaturated carboxylic acid.
Claim 6
Dependent Claim
24 words
A film structure as claimed in claim 1 wherein a primer coating is provided between the base layer and the vinylidene chloride polymer layer.
Claim 7
Dependent Claim
25 words
A film structure as claimed in claim 1 wherein a layer of an acrylic polymer is applied to the other surface of the base layer.
Claim 8
Dependent Claim
44 words
A film structure as claimed in claim 1 wherein the polypropylene base layer includes particles of a polymer having a height melting point than polypropylene and contained in voids produced upon orientation of the base layer so that said base layer is substantially opaque.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |