US4031162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer film with narrow molecular weight distribution and saran and laminates thereof
Assignee: WR Grace and Co Conn
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Filing: 1976-01-02
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Granted: 1977-06-21
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Expires: 1996-01-02
Abstract
Abstract A film of ethylene vinyl acetate having a narrow molecular weight distribution and a saran composition that is a blend of emulsion and suspension polymerized saran or a saran composition that includes emulsion polymerized saran of the type generally considered suitable for liquid coating. A laminate including the film and composition and the method for production thereof including sequentially melt extruding tubular films of ethylene vinyl acetate which is irradiated, saran and ethylene vinyl acetate and then bubble orienting the three-ply laminate. The laminate is employed for packaging and forming packages of bone-in fresh red meat.
Inventors
- 👤 Harri J. Brax
- 👤 Joseph F. Porinchak
- 👤 Alan S. Weinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:29
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/08; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/0016; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B32; B32B; B32B27/00; B29C48/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
63 words
A saran composition useful for melt extruding to form a film or the like comprising a blend of a. 5-40 weight percent of a polymer of vinylidene chloride prepared by a suspension polymerization method and b. 60-95 weight percent of a polymer of vinylidene chloride prepared by an emulsion polymerization method, said polymers each containing at least 50% by weight of vinylidene chloride.
Claim 2
Dependent Claim
63 words
A saran composition useful for melt extruding to form a film or the like comprising a blend of a. 5-40 weight percent of a polymer of vinylidene chloride prepared by a suspension polymerization method and b. 60-95 weight percent of a polymer of vinylidene chloride prepared by an emulsion polymerization method, said polymers each containing at least 50% by weight of vinylidene chloride.
Claim 3
Dependent Claim
16 words
The composition of claim 1 wherein said blend comprises 5-15% of (a) and 85-95% of (b).
Claim 4
Dependent Claim
22 words
The composition of claim 1 wherein each of said polymers of vinylidene chloride are copolymers of vinylidene chloride and 5-40% vinyl chloride.
Claim 5
Dependent Claim
9 words
The composition of claim 1 including 2-10% epoxy resin.
Claim 6
Dependent Claim
9 words
The composition of claim 1 including 4-6% epoxy resin.
References Cited (Backward Citations)
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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) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |