US4764404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Films having a polypropylene blend layer
Assignee: Pechiney Plastic Packaging Inc
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Filing: 1985-11-29
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Granted: 1988-08-16
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Expires: 2005-11-29
Abstract
Abstract A polymeric composition is a blend of a first component comprising polypropylene, a second component comprising an ethylene-based copolymer, and a third component which may be an elastomeric polymer. The blends are useful in making single and plural layer sheet structures. Such a structure comprises a first layer (12) made from said blend and a second layer (14) of an abuse-resistant polymer such as polypropylene. Optionally, the structure includes further layers, e.g. a barrier layer to prevent or reduce gas infusion. The blend layer (12) can be employed as the means for making heat seals (28) between layers of the sheet structure to form a packaging pouch (30), and is able to withstand retorting conditions without becoming significantly embrittled.
Inventors
- 👤 Roger P. Genske
- 👤 Yong J. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:04
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29C; B29C48/00; B29C48/03; B29C48/07; B29C48/08; B29C48/16; B29C48/18; B29C48/185; B32B15/00; B32B15/04; B32B15/08; B32B27/10; B32B27/30; B32B27/302; B32B27/304; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B7/12; C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; B32B2270/00; B32B2307/00; B32B2307/30; B32B2307/31; B32B2323/00; B32B2323/04; B32B2323/10; B32B2323/16; B32B2325/00; B32B2439/00; C08L2205/00; C08L2205/03; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L23/0846; C08L23/0853; C08L23/0861; C08L23/14; C08L23/16; C08L23/18; C08L23/20; C08L23/22; C08L27/00; C08L27/02; C08L27/04; C08L27/08; C08L53/00; C08L53/02; C08L77/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1338; Y10T428/1341; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587; Y10T428/31605; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/3192; Y10T428/31924
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
158 words
A mulitple layer sheet structure, comprising: (a) a first layer of metal foil having two opposing surfaces on opposing sides of said foil layer; (b) a second layer of an abuse resistant polymer adhered to one said surface on one said side of said foil; and (c) a third layer adhered to said sheet structure on the other said side of said foil layer, the composition of said third layer being a blend of (i) as a first component, a polypropylene polymer, (ii) as a second component, a polymeric composition providing elastomeric properties, and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third component, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
Claim 2
Dependent Claim
158 words
A mulitple layer sheet structure, comprising: (a) a first layer of metal foil having two opposing surfaces on opposing sides of said foil layer; (b) a second layer of an abuse resistant polymer adhered to one said surface on one said side of said foil; and (c) a third layer adhered to said sheet structure on the other said side of said foil layer, the composition of said third layer being a blend of (i) as a first component, a polypropylene polymer, (ii) as a second component, a polymeric composition providing elastomeric properties, and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third component, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
Claim 3
Dependent Claim
32 words
A mutliple layer sheet structure as in claim 1 wherein said third component is present in a amount of 10% to about 40% by weight of the overall composition of said blend.
Claim 4
Dependent Claim
33 words
A multiple layer sheet structure as in claim 1, said second component comprising a copolymer of about 85 to about 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 5
Dependent Claim
33 words
A multiple layer sheet structure as in claim 2, said second component comprising a copolymer of about 85 to about 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 6
Dependent Claim
33 words
A multiple layer sheet structure as in claim 1, said second component comprising a copolymer of about 60 to about 80 mole percent ethylene and about 40 to about 20 mole percent propylene.
Claim 7
Dependent Claim
33 words
A multiple layer sheet structure as in claim 2, said second component comprising a copolymer of about 60 to about 80 mole percent ethylene and about 40 to about 20 mole percent propylene.
Claim 8
Dependent Claim
190 words
A multiple layer sheet structure, comprising: (a) a first layer of a polyamide having two opposing surfaces on opposing sides of said polyamide layer; (b) a second layer of an ethylene vinyl alcohol copolymer having two opposing surfaces, one said surface of said second layer being on one said surface on one said side of said first layer; (c) a third layer of a polyamide on the other said surface of said second layer opposite said first layer; and (d) a fourth layer adhered in said sheet structure to the other said side of said first layer, the composition of said fourth layer being a blend of (i) as a first component, a polypropylene, (ii) as a second component, a polymeric composition providing elastomeric properties and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third component, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
Claim 9
Dependent Claim
190 words
A multiple layer sheet structure, comprising: (a) a first layer of a polyamide having two opposing surfaces on opposing sides of said polyamide layer; (b) a second layer of an ethylene vinyl alcohol copolymer having two opposing surfaces, one said surface of said second layer being on one said surface on one said side of said first layer; (c) a third layer of a polyamide on the other said surface of said second layer opposite said first layer; and (d) a fourth layer adhered in said sheet structure to the other said side of said first layer, the composition of said fourth layer being a blend of (i) as a first component, a polypropylene, (ii) as a second component, a polymeric composition providing elastomeric properties and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third component, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
Claim 10
Dependent Claim
33 words
A multiple layer sheet structure as in claim 7 wherein said third component is present in an amount of about 10% to about 40% by weight of the overall composition of said blend.
Claim 11
Dependent Claim
33 words
A multiple layer sheet structure as in claim 7, said second component comprising a copolymer of about 85 to abou 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 12
Dependent Claim
33 words
A multiple layer sheet structure as in claim 8, said second component comprising a copolymer of about 85 to about 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 13
Dependent Claim
33 words
A multiple layer sheet structure as in claim 7, said second component comprising a copolymer of about 60 to about 80 mole percent ethylene and about 40 to about 20 mole percent propylene.
Claim 14
Dependent Claim
33 words
A multiple layer sheet structure as in claim 8, said second component comprising a copolymer of about 60 to about 80 mole percent ethylene and about 40 to about 20 mole percent propylene.
Claim 15
Dependent Claim
169 words
A multiple layer sheet structure comprising: (a) a first layer of a barrier material having two opposing surfaces on opposing sides of said first layer, the composition of said first layer being a vinylidene chloride copolymer; (b) a second layer of an abuse resistant polymer adhered to one said surface on one said side of said first layer; and (c) a third layer adhered, in said sheet structure, on the other said side of said first layer, the composition of said third layer being a blend of (i) a first component of polypropylene, (ii) as a second component, a polymeric composition providing elastomeric properties, and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third componet, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
Claim 16
Dependent Claim
169 words
A multiple layer sheet structure comprising: (a) a first layer of a barrier material having two opposing surfaces on opposing sides of said first layer, the composition of said first layer being a vinylidene chloride copolymer; (b) a second layer of an abuse resistant polymer adhered to one said surface on one said side of said first layer; and (c) a third layer adhered, in said sheet structure, on the other said side of said first layer, the composition of said third layer being a blend of (i) a first component of polypropylene, (ii) as a second component, a polymeric composition providing elastomeric properties, and chosen from the group consisting of ethylene butene-1 copolymer and ethylene propylene copolymer, and (iii) as a third componet, a third polymeric composition providing elastomeric properties and selected from the group consisting of ethylene butene-1 copolymer, ethylene propylene copolymer, polybutylene, polyisobutylene, ethylene propylene diene monomer terpolymer, styrene butadiene styrene copolymer, styrene ethylene butylene styrene copolymer, styrene isoprene styrene copolymer, polybutene-1, and isobutylene isoprene copolymer.
Claim 17
Dependent Claim
33 words
A multiple layer sheet structure as in claim 13 wherein said third component is present in an amount of about 10% to about 40% by weight of the overall composition of said blend.
Claim 18
Dependent Claim
33 words
A multiple layer sheet structure as in claim 13, said second component comprising a copolymer of about 85 to about 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 19
Dependent Claim
33 words
A multiple layer sheet structure as in claim 14, said second component comprising a copolymer of about 85 to about 95 mole percent ethylene and about 15 to about 5 mole percent butene-1.
Claim 20
Dependent Claim
33 words
A multiple layer sheet structure as in claim 13, said second component comprising a copolymer of about 60 to about 80 mole percent ethylene and about 40 to about 20 mole percent propylene.
Claim 21
Dependent Claim
33 words
A multiple layer sheet structure as in claim 14, said second component comprising a copolymer of about 60 to about 80 mole percent ethylene and about 40 to about 20 mole percent propylene.
Claim 22
Dependent Claim
13 words
A package made with a sheet structure of any one of claims 1-18.
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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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |