US4994130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing a composite laminate
Assignee: Mitsubishi Chemical Corp
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Filing: 1989-08-17
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Granted: 1991-02-19
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Expires: 2009-08-17
Abstract
Abstract A method for continuously producing a composite laminate comprising a thermoplastic synthetic resin sheet and an aluminum sheet laminated on each side of the resin sheet, wherein (1) as the thermoplastic resin sheet, a solid sheet is used, (2) as the aluminum sheet, an aluminum sheet having a thermoplastic adhesive layer provided on its surface is used, (3) two such aluminum sheets with the respective adhesive layers facing to each other, with the thermoplastic synthetic resin sheet interposed therebetween, are fed to hot press bonding rollers, and (4) when they are fed to the hot press bonding rollers, (a) a tension of at least 2 kg/mm 2 is exerted to each aluminum sheet, and (b) the thermoplastic adhesive layer provided on the surface of each aluminum sheet is maintained to be in a molten state.
Inventors
- 👤 Kunihiko Ichikawa
- 👤 Kiyoshi Mishima
- 👤 Kunio Tsukagoshi
- 👤 Isao Hayatsu
- 👤 Toshiharu Yamazaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:07
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/18; B32B15/20; B32B27/00; B32B27/32; B32B37/00; B32B37/14; B32B37/144; B32B7/00; B32B7/04; B32B7/12; B32B2311/00; B32B2311/24; B32B2311/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
A method for continuously producing a composite laminate comprising a thermoplastic synthetic resin sheet and an aluminum sheet laminated on each side of the resin sheet, wherein (1) as the thermoplastic resin sheet, a solid sheet 1-10 mm thick is used, (2) as the aluminum sheet, an aluminum sheet 0.01-0.5 mm thick having a thermoplastic adhesive layer provided on its surface is used, (3) two such aluminum sheets with the respective adhesive layers facing to each other, with the thermoplastic synthetic resin sheet interposed therebetween, are fed to hot press bonding rollers, and (4) when they are fed to the hot press bonding rollers, (a) a tension of at least 2 kg/mm 2 is exerted to each aluminum sheet, and (b) the thermoplastic adhesive layer provided on the surface of each aluminum sheet is maintained to be in a molten state.
Claim 2
Independent Claim
141 words
A method for continuously producing a composite laminate comprising a thermoplastic synthetic resin sheet and an aluminum sheet laminated on each side of the resin sheet, wherein (1) as the thermoplastic resin sheet, a solid sheet 1-10 mm thick is used, (2) as the aluminum sheet, an aluminum sheet 0.01-0.5 mm thick having a thermoplastic adhesive layer provided on its surface is used, (3) two such aluminum sheets with the respective adhesive layers facing to each other, with the thermoplastic synthetic resin sheet interposed therebetween, are fed to hot press bonding rollers, and (4) when they are fed to the hot press bonding rollers, (a) a tension of at least 2 kg/mm 2 is exerted to each aluminum sheet, and (b) the thermoplastic adhesive layer provided on the surface of each aluminum sheet is maintained to be in a molten state.
Claim 3
Dependent Claim
16 words
The method according to claim 1, wherein the thermoplastic synthetic resin sheet is a polyolefin sheet.
Claim 4
Dependent Claim
70 words
The method according to claim 1, wherein the thermoplastic adhesive layer provided on the surface of the aluminum sheet has a double-layered structure comprising a layer of a polyolefin modified with an unsaturated carboxylic acid or its derivative, formed on the surface of the aluminum sheet and a layer of the same resin as used for the thermoplastic resin sheet as the core material, formed on the modified polyolefin layer.
Claim 5
Independent Claim
141 words
A method for continuously producing a composite laminate comprising a thermoplastic synthetic resin sheet and an iron sheet laminated on each side of the resin sheet, wherein (1) as the thermoplastic resin sheet, a solid sheet 1-10 mm thick is used, (2) as the iron sheet, an iron sheet 0.01-0.5 mm thick having a thermoplastic adhesive layer provided on its surface is used, (3) two such iron sheets with the respective adhesive layers facing to each other, with the thermoplastic synthetic resin sheet interposed therebetween, are fed to hot press bonding rollers, and (4) when they are fed to the hot press bonding rollers, (a) a tension of at least 6 kg/mm 2 is exerted to each iron sheet, and (b) the thermoplastic adhesive layer provided on the surface of each iron sheet is maintained to be in a molten state.
Claim 6
Independent Claim
141 words
A method for continuously producing a composite laminate comprising a thermoplastic synthetic resin sheet and an iron sheet laminated on each side of the resin sheet, wherein (1) as the thermoplastic resin sheet, a solid sheet 1-10 mm thick is used, (2) as the iron sheet, an iron sheet 0.01-0.5 mm thick having a thermoplastic adhesive layer provided on its surface is used, (3) two such iron sheets with the respective adhesive layers facing to each other, with the thermoplastic synthetic resin sheet interposed therebetween, are fed to hot press bonding rollers, and (4) when they are fed to the hot press bonding rollers, (a) a tension of at least 6 kg/mm 2 is exerted to each iron sheet, and (b) the thermoplastic adhesive layer provided on the surface of each iron sheet is maintained to be in a molten state.
Claim 7
Dependent Claim
16 words
The method according to claim 4, wherein the thermoplastic synthetic resin sheet is a polyolefin sheet.
Claim 8
Dependent Claim
70 words
The method according to claim 4, wherein the thermoplastic adhesive layer provided on the surface of the iron sheet has a double-layered structure comprising a layer of a polyolefin modified with an unsaturated carboxylic acid or its derivative, formed on the surface of the iron sheet and a layer of the same resin as used for the thermoplastic resin sheet as the core material, formed on the modified polyolefin layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |