US4156749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic multilayer packaging film containing plasticized polyvinyl chloride
Assignee: Union Carbide Corp
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Filing: 1978-01-18
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Granted: 1979-05-29
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Expires: 1998-01-18
Abstract
Abstract An elastic multilayer film suitable for use in connection with the packaging of poultry, comprises a first outer layer including a plasticized polyvinyl chloride having an inherent viscosity greater than about 1.10 and having a plasticizer content of from about 35 phr to about 40 phr, and a second outer layer including an ethylene vinyl acetate copolymer having a vinyl acetate content of from about 16% to about 20% by weight and having a melt flow of from about 1.0 to about 3.0 decigrams per minute.
Inventors
- 👤 Stanley Lustig
- 👤 Stephen J. Vicik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:19
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/22; B32B27/30; B32B27/304; B32B27/306; B32B2307/00; B32B2307/50; B32B2307/51; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1341; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/24975; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31928
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
An elastic multilayer film adapted for packaging of poultry, consisting essentially of a first outer layer including a plasticized polyvinyl chloride having an inherent viscosity greater than about 1.10 and having a plasticizer content of from about 35 phr to about 40 phr; and a second outer layer including an ethylene vinyl acetate copolymer having a vinyl acetate content of from about 16% to about 20% by weight and having a melt flow of from about 1.0 to about 3.0 decigrams per minute.
Claim 2
Dependent Claim
83 words
An elastic multilayer film adapted for packaging of poultry, consisting essentially of a first outer layer including a plasticized polyvinyl chloride having an inherent viscosity greater than about 1.10 and having a plasticizer content of from about 35 phr to about 40 phr; and a second outer layer including an ethylene vinyl acetate copolymer having a vinyl acetate content of from about 16% to about 20% by weight and having a melt flow of from about 1.0 to about 3.0 decigrams per minute.
Claim 3
Dependent Claim
14 words
The film of claim 1, wherein the vinyl acetate is about 18% by weight.
Claim 4
Dependent Claim
15 words
The film of claim 1, wherein said layers are in physical contact with each other.
Claim 5
Dependent Claim
17 words
The film of claim 1, wherein said second outer layer has a thickness of about 0.75 mil.
Claim 6
Dependent Claim
14 words
The film of claim 4, wherein the vinyl acetate is about 18% by weight.
Claim 7
Dependent Claim
11 words
The film of claim 1, wherein said plasticizer includes dibutyl sebacate.
Claim 8
Dependent Claim
15 words
The film of claim 1, wherein said dibutyl sebacate is at least about 27 phr.
Claim 9
Dependent Claim
13 words
The film of claim 7, wherein said plasticizer further includes epoxidized soybean oil.
Claim 10
Dependent Claim
11 words
The film of claim 1, wherein said plasticizer includes di-n-hexyl azelate.
Claim 11
Dependent Claim
15 words
The film of claim 1, wherein said melt flow is about 1.0 decigram per minute.
Claim 12
Dependent Claim
39 words
The film of claim 1, wherein said first outer layer has a thickness of from about 1.75 mils to about 2.0 units and said second outer layer has a thickness of from about 0.5 mil to about 0.75 mil.
Claim 13
Dependent Claim
9 words
A bag fabricated from the film of claim 1.
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) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |