US4416949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite panel comprising a metal foil and a polyolefine sheet
Assignee: Solvay SA
•
Filing: 1981-09-11
•
Granted: 1983-11-22
•
Expires: 2001-09-11
Abstract
Abstract The invention relates to a composite panel comprising at least one metal foil combined, by hot pressing, with at least one polyolefine sheet in which the polyolefine sheet is produced from a mixture of 10 to 90% by weight of cellulose fibres and from 90 to 10% by weight of a polyolefine modified by polar monomer units derived from at least one monomer selected from the group consisting of the unsaturated carboxylic acids, the corresponding anhydrides and their derivatives. The presence of cellulose fibres in the polyolefine improves the adhesion between the components of the composite panel.
Inventors
- 👤 Rodolfo Gabellieri
- 👤 Rene Bouteille
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:28
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; B32B15/085; B32B15/18; B32B15/20; B32B2262/00; B32B2262/06; B32B2262/062; B32B2307/00; B32B2307/70; B32B2307/738; B32B2323/00; B32B2323/04; B32B2323/043; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31692; Y10T428/31699; Y10T428/31703; Y10T428/31855; Y10T428/3188; Y10T428/31884
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
78 words
Composite panel comprising at least one metal foil combined, directly by hot pressing without any adhesive, with at least one polyolefine sheet, the polyolefine sheet comprising from 10 to 90% by weight of cellulose fibres and from 90 to 10% by weight of a polyolefine modified by polar monomer units derived from at least one organic compound containing at least one double bond and at least one carboxyl group, which may be in the form of an anhydride.
Claim 2
Dependent Claim
78 words
Composite panel comprising at least one metal foil combined, directly by hot pressing without any adhesive, with at least one polyolefine sheet, the polyolefine sheet comprising from 10 to 90% by weight of cellulose fibres and from 90 to 10% by weight of a polyolefine modified by polar monomer units derived from at least one organic compound containing at least one double bond and at least one carboxyl group, which may be in the form of an anhydride.
Claim 3
Dependent Claim
24 words
Composite panel according to claim 1, wherein the modified polyolefine is a copolymer of at least one alpha-olefine with at least one polar monomer.
Claim 4
Dependent Claim
30 words
Composite panel according to claim 2, wherein the copolymer is a graft copolymer in which the main chain has a polyolefine structure and the side chains consist of polar monomers.
Claim 5
Dependent Claim
31 words
Composite panel according to claim 1, wherein the modified polyolefine contains monomer units derived from unsubstituted alpha-olefines selected from monoolefines of which the molecule contains from 2 to 6 carbon atoms.
Claim 6
Dependent Claim
28 words
Composite panel according to claim 1, wherein the monomer is selected from the group consisting of acrylic monomers, methacrylic monomers, the unsaturated polycarboxylic acids and the corresponding anhydrides.
Claim 7
Dependent Claim
24 words
Composite panel according to claim 5, wherein the modified polyolefine is a high density polyethylene or a polypropylene and the monomer is maleic anhydride.
Claim 8
Dependent Claim
17 words
Composite panel according to claim 1, wherein the modified polyolefine is in the form of fibrillated structures.
Claim 9
Dependent Claim
29 words
Composite panel according to claim 1, wherein the metal foil is produced from a metal selected from the group consisting or iron, aluminium, copper, zinc, titanium and their alloys.
Claim 10
Dependent Claim
19 words
Composite panel according to claim 1, wherein the panel consists of a polyolefine sheet enclosed between two metal foils.
Claim 11
Dependent Claim
11 words
Composite panel according to claim 1, wherein the panel is thermoformed.
Claim 12
Dependent Claim
28 words
Composite panel according to claim 1, wherein the modified polyolefine contains 50 to 99% monomeric units derived from alphaolefines, with the remainder consisting of the polar monomer units.
Claim 13
Dependent Claim
12 words
Composite panel according to claim 1, wherein the monomer is maleic anhydride.
Claim 14
Dependent Claim
15 words
Composite panel according to claim 12, wherein the modified polyolefin is a high density polyethylene.
References Cited (Backward Citations)
BE568524A
Cited
FR1236686A
Cited
FR1268469A
Cited
AT260554B
Cited
DE1951609U
Cited
US3468753A
Cited
US3511750A
Cited
US3392045A
Cited
US3582452A
Cited
US3740383A
Cited
BE748724A
Cited
US3565747A
Cited
US3647617A
Cited
DE2144409A1
Cited
DE2165115B2
Cited
US4025593A
Cited
US4189455A
Cited
US3883630A
Cited
BE789804A
Cited
DE2252758A1
Cited
BE811780A
Cited
BE824844A
Cited
BE847491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |