US4762737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-layer non-corrosive plastic film
Assignee: Mobil Oil AS
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Filing: 1985-05-07
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Granted: 1988-08-09
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Expires: 2005-05-07
Abstract
Abstract Disclosed is a multi-layer film comprised of at least one high density polyolefin (HDPE) layer, at least one polyamide layer and an HDPE/polyamide adhesion promoting agent. The agent is substantially free of inorganic salt groups and it is a non-ionic product of a polymerization reaction of a C2-C6 alpha-olefin with a monocarboxylic acid of the formula R-COOH wherein R is an ethylenically unsaturated hydrocarbyl group.
Inventors
- 👤 Pang-Chia Lu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:29
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/32; B32B27/34; B32B7/00; B32B7/04; B32B7/12; C; C08; C08J; C08J5/00; C08J5/12; B32B2323/00; B32B2323/04; B32B2323/043; B32B2377/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31746; Y10T428/3175; Y10T428/31757
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
69 words
A multi-layer film comprising: (a) at least one high density polyolefin layer; (b) at least one polyamide layer; and (c) a minor amount of an agent promoting the adhesion of the polyamide layer to the high density polyolefin layer, the agent being substantially free of inorganic salt groups and comprising a non-ionic product of a polymerization reaction of at least one C 2 -C 6 alpha-olefin with methacrylic acid.
Claim 2
Dependent Claim
69 words
A multi-layer film comprising: (a) at least one high density polyolefin layer; (b) at least one polyamide layer; and (c) a minor amount of an agent promoting the adhesion of the polyamide layer to the high density polyolefin layer, the agent being substantially free of inorganic salt groups and comprising a non-ionic product of a polymerization reaction of at least one C 2 -C 6 alpha-olefin with methacrylic acid.
Claim 3
Dependent Claim
14 words
A film of claim 1 wherein the C 2 -C 6 alpha-olefin is ethylene.
Claim 4
Dependent Claim
26 words
A film of claim 2 wherein the high density polyolefin layer is comprised of a polyolefin having a density of about 0.930 to about 0.960 g/cc.
Claim 5
Dependent Claim
33 words
A film of claim 3 wherein the polyamide layer is selected from the group consisting of Nylon 6, Nylon 9, Nylon 11, Nylon 12, Nylon 6/6, Nylon 6/9, Nylon 6/10 and Nylon 6/12.
Claim 6
Dependent Claim
30 words
A film of claim 4 wherein the amount of the agent in the film is about 2% to about 24% by weight, based on the total weight of the film.
Claim 7
Dependent Claim
30 words
A film of claim 5 wherein the amount of the agent in the film is about 4% to about 14% by weight based on the total weight of the film.
Claim 8
Dependent Claim
30 words
A film of claim 6 wherein the amount of the agent in the film is about 5 to about 12% by weight, based on the total weight of the film.
Claim 9
Dependent Claim
27 words
A film of claim 7 wherein the amount of the agent in the film is about 9% by weight based on the total weight of the film.
Claim 10
Dependent Claim
65 words
A thermoplastic bag which comprises at least one high density polyolefin layer, at least one polyamide layer, and a minor amount of an agent promoting the adhesion of the polyamide layer to the high density polyolefin layer, the agent being substantially free of inorganic salt groups and comprising a non-ionic product of a polymerization reaction of a C 2 -C 6 alpha-olefin with methacrylic acid.
Claim 11
Dependent Claim
65 words
A thermoplastic bag which comprises at least one high density polyolefin layer, at least one polyamide layer, and a minor amount of an agent promoting the adhesion of the polyamide layer to the high density polyolefin layer, the agent being substantially free of inorganic salt groups and comprising a non-ionic product of a polymerization reaction of a C 2 -C 6 alpha-olefin with methacrylic acid.
Claim 12
Dependent Claim
15 words
A thermoplastic bag of claim 9 wherein the C 2 -C 6 alpha-olefin is ethylene.
Claim 13
Dependent Claim
27 words
A thermoplastic bag of claim 10 wherein the high density polyolefin layer is comprised of a polyolefin having a density of about 0.930 to about 0.960 g/cc.
Claim 14
Dependent Claim
34 words
A thermoplastic bag of claim 11 wherein the polyamide layer is selected from the group consisting of Nylon 6, Nylon 9, Nylon 11, Nylon 12, Nylon 6/6, Nylon 6/9, Nylon 6/10 and Nylon 6/12.
Claim 15
Dependent Claim
20 words
A thermoplastic bag of claim 12 wherein the amount of the agent is about 2% to about 24% by weight.
Claim 16
Dependent Claim
20 words
A thermoplastic bag of claim 13 wherein the amount of the agent is about 4% to about 14% by weight.
Claim 17
Dependent Claim
23 words
A thermoplastic bag of claim 14 wherein the amount of the agent in the bag is about 5 to about 12% by weight.
Claim 18
Dependent Claim
17 words
A thermoplastic bag of claim 15 wherein the amount of the agent is about 9% by weight.
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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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |