US4279957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laminated film or sheet structure and process for production thereof
Assignee: Mitsui Chemicals Inc
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Filing: 1979-08-30
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Granted: 1981-07-21
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Expires: 1999-08-30
Abstract
Abstract A laminated film or sheet structure composed of (i) an adhesive layer (A), (ii) synthetic resin film layers (B1) and (B2) monoaxially oriented in a direction oblique to the longitudinal direction of the film, said layers (B1) and (B2) being located on both surfaces of said layer (A) in contact therewith, the directions of the orientations of said layers (B1) and (B2) crossing each other, and (iii) a substantially non-oriented synthetic resin film layer (C1) and/or a substantially non-oriented synthetic resin film layer (C2), said layers (C1) and/or (C2) being melt-adhered to both or one of said layers (B1) and (B2), said layers (Cc) and/or (C2) having a lower orientation temperature than said layers (B1) and (B2); and a process for production thereof.
Inventors
- 👤 Takayuki Hiraoka
- 👤 Kenji Fujiyoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:53
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0015; B29C48/03; B29C48/09; B29C48/16; B29C48/18; B29C48/21; B32B1/00; B32B1/08; B32B27/32; B32B37/00; B32B37/28; B32B7/00; B32B7/04; B32B7/12; B32B2307/00; B32B2307/50; B32B2307/514; B32B2307/516; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/31504; Y10T428/31551; Y10T428/31573
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
152 words
A laminated film or sheet structure composed of (i) an adhesive layer (A), (ii) synthetic resin film layers (B 1 ) and (B 2 ) monoaxially oriented in a direction oblique to the longitudinal direction of the film, said layers (B 1 ) and (B 2 ) being located on both surfaces of said layer (A) in contact therewith, the directions of the orientations of said layers (B 1 ) and (B 2 ) crossing each other, and (iii) at least one of a substantially non-oriented synthetic resin film layer (C 1 ) and a substantially non-oriented synthetic resin film layer (C 2 ), said layers (C 1 ) and (C 2 )being melt-adhered to at least one of said layers (B 1 ) and (B 2 ), said layers (C 1 ) and (C 2 ) having a lower orientation temperature than said layers (B 1 ) and (B 2 ).
Claim 2
Dependent Claim
152 words
A laminated film or sheet structure composed of (i) an adhesive layer (A), (ii) synthetic resin film layers (B 1 ) and (B 2 ) monoaxially oriented in a direction oblique to the longitudinal direction of the film, said layers (B 1 ) and (B 2 ) being located on both surfaces of said layer (A) in contact therewith, the directions of the orientations of said layers (B 1 ) and (B 2 ) crossing each other, and (iii) at least one of a substantially non-oriented synthetic resin film layer (C 1 ) and a substantially non-oriented synthetic resin film layer (C 2 ), said layers (C 1 ) and (C 2 )being melt-adhered to at least one of said layers (B 1 ) and (B 2 ), said layers (C 1 ) and (C 2 ) having a lower orientation temperature than said layers (B 1 ) and (B 2 ).
Claim 3
Dependent Claim
32 words
The structure of claim 1 wherein said layer (A) is composed of a resin having a lower melting point than the resin forming said layers (B 1 ) and (B 2 ).
Claim 4
Dependent Claim
47 words
The structure of claim 1 wherein said layers (C 1 ) and (C 2 ) are formed of a resin having a melting point at least about 20° C. lower than the melting point of the resin forming said layers (B 1 ) and (B 2 ).
Claim 5
Dependent Claim
13 words
The structure of claim 1 wherein said layer (A) is a polyurethane-type adhesive.
Claim 6
Dependent Claim
35 words
The structure of claim 1 wherein said layers (B 1 ) and (B 2 ) are formed of a resin selected from the group consisting of homopolymers of alpha-olefins having 2 to 10 carbon atoms.
Claim 7
Dependent Claim
35 words
The structure of claim 1 wherein said layers (C 1 ) and (C 2 ) are formed of a resin selected from the group consisting of copolymers of alpha-olefins having 2 to 10 carbon atoms.
References Cited (Backward Citations)
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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) | 1984-07-20 | 1985-01-19 | 1985-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-07-20 | 1989-01-19 | 1989-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-07-20 | 1993-01-19 | 1993-07-21 | $7700.00 | Window Closed / Lapsed |