US4223074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing metal-boehemite laminates
Assignee: Artience Co Ltd
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Filing: 1977-03-22
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Granted: 1980-09-16
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Expires: 1997-03-22
Abstract
Abstract A process for the production of a laminate which comprises laminating a boehmite- or pseudoboehmite-treated aluminum foil with an oxidation-treated polyolefin film with the treated surface of the foil facing to the treated surface of the film under heat and pressure without the use of binders for lamination. In one embodiment, the laminate so produced may be laminated with the same laminate with the treated surface of the foil of the former facing to the treated surface of the film of the latter, under heat and pressure, or it may be laminated on the aluminum foil side with a resin film, such as a polyester or polyamide film, with the use of a binder between the aluminum foil and the resin film.
Inventors
- 👤 Risaburo Yoshida
- 👤 Hidetoshi Nagata
- 👤 Michihisa Naito
- 👤 Keisuke Kaiho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:36
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/20; B32B27/00; B32B27/32; B32B3/00; B32B3/02; B32B3/04; B32B38/00; B32B38/0008; B32B2307/00; B32B2307/30; B32B2307/31; B32B2310/00; B32B2310/08; B32B2310/0806; B32B2310/0831; B32B2310/14; B32B2311/00; B32B2311/24; B32B2323/00; B32B2323/04; B32B2323/043; B32B2439/00; B32B2439/70; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31855
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
51 words
A process for the production of a laminate, comprising laminating a boehmite- or pseudoboehmite-treated aluminum foil with an oxidation-treated polyolefin film with the treated surface of the foil facing to the treated surface of the film, under heat and pressure to produce the laminate without the use of binders for lamination.
Claim 2
Dependent Claim
51 words
A process for the production of a laminate, comprising laminating a boehmite- or pseudoboehmite-treated aluminum foil with an oxidation-treated polyolefin film with the treated surface of the foil facing to the treated surface of the film, under heat and pressure to produce the laminate without the use of binders for lamination.
Claim 3
Dependent Claim
15 words
A process according to claim 1, wherein the oxidation-treated polyolefin film is in molten state.
Claim 4
Dependent Claim
15 words
A process according to claim 1, wherein the oxidation-treated polyolefin film is in non-molten state.
Claim 5
Dependent Claim
26 words
A process according to claim 1, wherein the polyolefin film is a member selected from the group consisting of high-density polyethylene films and unstretched polypropylene films.
Claim 6
Dependent Claim
26 words
A process according to claim 2, wherein the polyolefin film is a member selected from the group consisting of high-density polyethylene films and unstretched polypropylene films.
Claim 7
Dependent Claim
26 words
A process according to claim 3, wherein the polyolefin film is a member selected from the group consisting of high-density polyethylene films and unstretched polypropylene films.
Claim 8
Dependent Claim
17 words
A process according to claim 1, wherein the oxidation-treated polyolefin film is a corona discharge-treated polyolefin film.
Claim 9
Dependent Claim
20 words
A process according to claim 1, wherein the oxidation-treated polyolefin film is a corona discharge-treated and ultraviolet radiation-treated polyolefin film.
Claim 10
Dependent Claim
26 words
A process according to claim 1, further comprising subjecting the laminate to ultraviolet radiation with the polyolefin film side facing to a source of the radiation.
Claim 11
Dependent Claim
59 words
A process for the production of a laminate, comprising laminating the laminate of claim 1 on the aluminum foil side with a cover selected from the group consisting of the same laminate as above and a polyamide film or a polyester film, with the use of an isocyanate type adhesive between the laminate of claim 1 and the cover.
Claim 12
Dependent Claim
71 words
A heat sealable laminate for packaging foodstuffs, comprising (1) an oxidation-treated polyolefin film selected from the group consisting of oxidation-treated high-density polyethylene films and unstretched polypropylene films and (2) an aluminum foil having at least one side beohmite-treated, the film (1) and the foil (2) being laminated with each other with the boehmite-treated surface of the foil (2) facing to the oxidation-treated surface of the film (1) under heat and pressure.
Claim 13
Dependent Claim
71 words
A heat sealable laminate for packaging foodstuffs, comprising (1) an oxidation-treated polyolefin film selected from the group consisting of oxidation-treated high-density polyethylene films and unstretched polypropylene films and (2) an aluminum foil having at least one side beohmite-treated, the film (1) and the foil (2) being laminated with each other with the boehmite-treated surface of the foil (2) facing to the oxidation-treated surface of the film (1) under heat and pressure.
Claim 14
Dependent Claim
18 words
A heat sealable laminate according to claim 11, wherein the film (1) is in molten form during lamination.
Claim 15
Dependent Claim
18 words
A heat sealable laminate according to claim 11, wherein the film (1) is in non-molten form during lamination.
Claim 16
Dependent Claim
19 words
A heat sealable laminate according to claim 11, wherein the oxidation-treated polyolefin film is a corona discharge-treated polyolefin film.
Claim 17
Dependent Claim
22 words
A heat sealable laminate according to claim 11, wherein the oxidation-treated polyolefin film is a corona discharge-treated and ultraviolet radiation-treated polyolefin film.
Claim 18
Dependent Claim
43 words
A heat sealable laminate according to claim 11, wherein the oxidation-treated film (1) and the boehmite-treated foil (2) are subjected to ultraviolet radiation with the film (1) facing to a source of the ultraviolet radiation after they have been laminated with each other.
Claim 19
Dependent Claim
27 words
A process according to claim 1, wherein the heat at the surface of the rolls used to effect said laminating is in the range of 140°-240° C.
Claim 20
Dependent Claim
43 words
A process according to claim 1, wherein the the boehmite- or pseudoboehmite-treated aluminum foil is prepared by immersing aluminum foil in distilled or deionized water at not lower than 60° C. for a time sufficient to form a boehmite or pseudoboehmite layer thereon.
Claim 21
Dependent Claim
16 words
A process according to claim 18, wherein ammonia or an amine is added to the water.
Claim 22
Dependent Claim
36 words
A process according to claim 1, wherein the boehmite- or pseudoboehmite-treated aluminum foil is prepared by blowing steam at 100°-140° C. against aluminum foil for a time sufficient to form a boehmite or pseudoboehmite layer thereon.
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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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |