US4293664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cook-in film containing a blend of ionomer and elastomer
Assignee: Viskase Corp
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Filing: 1979-12-27
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Granted: 1981-10-06
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Expires: 1999-12-27
Abstract
Abstract A stretchable monolayer film adapted for packaging and cooling poultry, consists essentially of a blend of an ionomer and an elastomer.
Inventors
- 👤 Stanley Lustig
- 👤 Stephen J. Vicik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:21
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/025; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L23/0876; C08L23/16; C08L2203/00; C08L2203/16; C08L2666/00; C08L2666/02; C08L2666/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
A stretchable monolayer film adapted for packaging and cooking pountry, consisting essentially of a blend of (1) ionomer(s) of α-olefin(s) having a carbon number of 2 to 4 and α,β-ethylinically unsaturated carboxylic acid(s) having a carbon number of 3 to 6 containing one or more metallic ions connected to the side chains of the copolymer, and (2) an elastomer selected from the group consisting of a saturated ethylene-propylene copolymer elastomer having a Mooney viscosity greater than about 45 at 125° C. or an unsaturated ethylene-propylene non-conjugated diene terpolymer elastomer having a Mooney viscosity greater than about 65 at 125° C., said film having a thickness of from about 1.0 to about 3.0 mils.
Claim 2
Dependent Claim
113 words
A stretchable monolayer film adapted for packaging and cooking pountry, consisting essentially of a blend of (1) ionomer(s) of α-olefin(s) having a carbon number of 2 to 4 and α,β-ethylinically unsaturated carboxylic acid(s) having a carbon number of 3 to 6 containing one or more metallic ions connected to the side chains of the copolymer, and (2) an elastomer selected from the group consisting of a saturated ethylene-propylene copolymer elastomer having a Mooney viscosity greater than about 45 at 125° C. or an unsaturated ethylene-propylene non-conjugated diene terpolymer elastomer having a Mooney viscosity greater than about 65 at 125° C., said film having a thickness of from about 1.0 to about 3.0 mils.
Claim 3
Dependent Claim
21 words
The film of claim 1, wherein said elastomer amounts to from about 40% to about 60% by weight of said blend.
Claim 4
Dependent Claim
19 words
The film of claim 1, wherein said elastomer and said ionomer are in about equal amounts in said blend.
Claim 5
Dependent Claim
15 words
The film of claim 1, wherein said film has a thickness of about 2.0 mils.
Claim 6
Dependent Claim
9 words
A bag produced from the film of claim 1.
Claim 7
Dependent Claim
16 words
The film of claim 1, wherein said ionomer(s) comprises more than 50 wt. % of α-olefins.
Claim 8
Dependent Claim
27 words
The film of claim 1, wherein said ionomer(s) comprises 75 to 95 wt. % of α-olefins and 5 to 25 wt. % of α,β-ethylinically unsaturated carboxylic acid(s).
Claim 9
Dependent Claim
23 words
The film of claim 1, wherein said ionomer is an ethylene methacrylic acid copolymer having 75 to 95 wt. % of ethylene components.
Claim 10
Dependent Claim
86 words
A stretchable monolayer film adapted for packaging and cooking poultry, consisting essentially of a blend of (1) an ethylene-methacrylic acid copolymer having an acid content of either 10% or 12% by weight neutralized with either a zinc or sodium salt and (a) an ethylene-propylene (5-ethylidene-2-norbornene) unsaturated terpolymer having a Mooney viscosity of about 73 at 125° C., with said copolymer and said terpolymer being in about equal amounts by weight in said blend, and said film having a thickness of about 1.0 to about 3.0 mils.
Claim 11
Dependent Claim
86 words
A stretchable monolayer film adapted for packaging and cooking poultry, consisting essentially of a blend of (1) an ethylene-methacrylic acid copolymer having an acid content of either 10% or 12% by weight neutralized with either a zinc or sodium salt and (a) an ethylene-propylene (5-ethylidene-2-norbornene) unsaturated terpolymer having a Mooney viscosity of about 73 at 125° C., with said copolymer and said terpolymer being in about equal amounts by weight in said blend, and said film having a thickness of about 1.0 to about 3.0 mils.
Claim 12
Dependent Claim
9 words
A bag produced from the film of claim 9.
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) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |