US4567090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-resistant laminate film
Assignee: Kureha Corp
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Filing: 1985-04-10
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Granted: 1986-01-28
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Expires: 2005-04-10
Abstract
Abstract Disclosed herein is a heat-resistant laminate film comprising a gas-barrier layer of a copolymer of vinylidene chloride and at least one comonomer copolymerizable with vinylidene chloride, outer layers of polypropylene and two adhesive layers of polyolefin modified by acid and thermoplastic polyurethane, disposed between any of the above layers and bonded with each other, the modified polyolefin adhesive layer being bonded to the outer layer and the thermoplastic polyurethane adhesive layer being bonded to the gas-barrier layer.
Inventors
- 👤 Masaki Ohya
- 👤 Yoshihiro Matsukura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:40
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/30; B32B27/304; B32B27/32; B32B7/00; B32B7/04; B32B7/12; B32B2307/00; B32B2307/30; B32B2307/306; B32B2323/00; B32B2323/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24959; Y10T428/24967; Y10T428/26; Y10T428/266; Y10T428/269; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/3158; Y10T428/31855; Y10T428/31935
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
74 words
A heat-resistant laminate film comprising a gasbarrier layer of a copolymer of vinylidene chloride and at least one comonomer copolymerizable with vinylidene chloride, outer layers of polypropylene and two adhesive layers of polyolefin modified by acid and thermoplastic polyurethane disposed between any of the above layers and bonded with each other, the modified polyolefin adhesive layer being bonded to the outer layer and the thermoplastic polyurethane adhesive layer being bonded to the gas-barrier layer.
Claim 2
Dependent Claim
74 words
A heat-resistant laminate film comprising a gasbarrier layer of a copolymer of vinylidene chloride and at least one comonomer copolymerizable with vinylidene chloride, outer layers of polypropylene and two adhesive layers of polyolefin modified by acid and thermoplastic polyurethane disposed between any of the above layers and bonded with each other, the modified polyolefin adhesive layer being bonded to the outer layer and the thermoplastic polyurethane adhesive layer being bonded to the gas-barrier layer.
Claim 3
Dependent Claim
26 words
The heat-resistant laminate film according to claim 1, wherein the polyolefin modified by acid is acid-modified resin prepared by modifying polypropylene with an unsaturated carboxylic acid.
Claim 4
Dependent Claim
28 words
The heat-resistant laminate film according to claim 2, wherein the content of the unsaturated carboxylic acid is less than 10 % by weight based on the acid-modified resin.
Claim 5
Dependent Claim
30 words
The heat-resistant laminate film according to claim 1, wherein the thermoplastic polyurethane resin is a thermoplastic linear polyurethane elastomer produced by reacting a hydroxycontaining linear compound with an organic diisocyanate.
Claim 6
Dependent Claim
74 words
The heat-resistant laminate film according to claim 1, wherein the thickness of the laminate is from 40 to 1000μ, with the thickness of the gas-barrier layer being from 5 to 100μ, the thickness of the outer layer being from 25 to 950μ, the thickness of the adhesive layer of the polyolefin modified by acid from 1 to 50μ and the thickness of the adhesive layer of the thermoplastic polyurethane resin from 1 to 50μ.
References Cited (Backward Citations)
US4379117A
Cited
US3900616A
Cited
US3903351A
Cited
US3887755A
Cited
JPS54106584A
Cited
US4296156A
Cited
JPS58124646A
Cited
US4448792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-27 | 1989-07-29 | 1990-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-27 | 1993-07-29 | 1994-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-27 | 1997-07-29 | 1998-01-28 | $7700.00 | Window Closed / Lapsed |