US4368295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Films from compositions of polyesters and olefine polymers
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1981-06-22
•
Granted: 1983-01-11
•
Expires: 2001-06-22
Abstract
Abstract An opaque or translucent molecularly oriented film made from a composition comprising at least one linear polyester (preferably polyethylene terephthalate) and 0.5-100% by weight based on polyester of at least one olefine polymer, wherein said composition contains at least one carboxylated polyolefine in an amount of 0.05-50% by weight based on olefine polymer. The composition used for the film is preferably formed by precompounding the olefine polymer and carboxylated olefine and then mixing with the polyester.
Inventors
- 👤 Alan B. Newton
- 👤 Eric Nield
- 👤 Vir B. Singh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:49
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L67/00; C08L67/02; C08J2367/00; C08J2367/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
61 words
An opaque or translucent biaxially oriented film made from a composition which comprises at least one linear polyester and 0.5 to 100% by weight based on the weight of polyester of at least one olefine polymer, wherein said composition contains at least one carboxylated polyolefine in an amount of 0.05 to 50% by weight based on the weight of olefine polymer.
Claim 2
Dependent Claim
61 words
An opaque or translucent biaxially oriented film made from a composition which comprises at least one linear polyester and 0.5 to 100% by weight based on the weight of polyester of at least one olefine polymer, wherein said composition contains at least one carboxylated polyolefine in an amount of 0.05 to 50% by weight based on the weight of olefine polymer.
Claim 3
Dependent Claim
27 words
A film according to claim 1 wherein said composition comprises 0.5 to 20% by weight based on the weight of polyester of at least one olefine polymer.
Claim 4
Dependent Claim
28 words
A film according to claim 1 wherein said composition comprises 0.5 to 20% by weight based on the weight of olefine polymer of at least one carboxylated polyolefine.
Claim 5
Dependent Claim
15 words
A film according to claim 1 wherein the at least one polyester is polyethylene terephthalate.
Claim 6
Dependent Claim
31 words
A film according to claim 1 wherein the at least one olefine polymer is an olefine homopolymer or copolymer selected from one or more of polyethylene, polypropylene, poly-4-methylpentene and ethylene/propylene copolymer.
Claim 7
Dependent Claim
15 words
A film according to claim 1 wherein the carboxylated polyolefine is an oxidised olefine homopolymer.
Claim 8
Dependent Claim
35 words
A film according to claim 1 wherein the carboxylated polyolefine has a Brookfield Viscosity (140° C.) in the range 150 to 100,000 cps and an Acid Number in the range 5 to 200 mg KOH/g.
Claim 9
Dependent Claim
10 words
A film according to claim 1 which is heat set.
Claim 10
Dependent Claim
39 words
A film according to claim 1 wherein to form the composition used for the film the at least one olefine polymer and the at least one carboxylated polyolefine are precompounded and then mixed with the at least one polyester.
References Cited (Backward Citations)
US3944699A
Cited
US4219628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-10 | 1986-07-12 | 1987-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-10 | 1990-07-12 | 1991-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-10 | 1994-07-12 | 1995-01-11 | $7700.00 | Window Closed / Lapsed |