Patent US4702956A successfully refreshed from Google Patents.
US4702956A
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Method of bonding glass fibers or other substrates to various polymers by oxidizing the molten polymer surface, and articles produced thereby
Assignee: Solvay Solexis Inc
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Filing: 1985-12-12
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Granted: 1987-10-27
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Expires: 2005-12-12
Abstract
Abstract The surface of a molten polymer is treated with a flame as the polymer is extruded; the polymer is co-calendered with a substrate as a fibrous web immediately downstream from the extruder and the flame. Articles so treated exhibit superior bond strengths. In one embodiment, both the polymer and the web are treated with a flame prior to the step of co-calendering.
Inventors
- 👤 George S. Wilson
- 👤 Harvey E. Kline
- 👤 Joseph E. Mackey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:44
CPC Classifications
B; B32; B32B; B32B38/00; B32B38/0036; B29; B29C; B29C59/00; B29C59/08; B32B27/00; B32B27/12; B32B27/30; B32B27/304; B32B27/32; B32B27/322; B32B2262/00; B32B2262/10; B32B2262/101; B32B2310/00; B32B2310/04; B32B2310/0445; B32B2327/00; B32B2327/12; B32B2327/18; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T442/00; Y10T442/20; Y10T442/2025
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
63 words
The method of flame-treating molten polymer for improved adhesion to a web, comprising the steps of (a) extruding at least one polymer selected from the group consisting of ethylene/chlorotrifluoroethylene copolymer, ethylene/tetrafluoroethylene copolymer, polyvinylidene fluoride, copolyhexafluoroisopropylene-tetrafluoroethylene, vinylidene fluoride-tetrafluoroethylene copolymer, and polychlorotrifluoroethylene, (b) treating the surface of the extruded polymer with a flame, and (c) co-calendering the flame treated polymer with at least one web.
Claim 2
Independent Claim
63 words
The method of flame-treating molten polymer for improved adhesion to a web, comprising the steps of (a) extruding at least one polymer selected from the group consisting of ethylene/chlorotrifluoroethylene copolymer, ethylene/tetrafluoroethylene copolymer, polyvinylidene fluoride, copolyhexafluoroisopropylene-tetrafluoroethylene, vinylidene fluoride-tetrafluoroethylene copolymer, and polychlorotrifluoroethylene, (b) treating the surface of the extruded polymer with a flame, and (c) co-calendering the flame treated polymer with at least one web.
Claim 3
Dependent Claim
14 words
The method as recited in claim 1 wherein the flame is an oxidizing flame.
Claim 4
Dependent Claim
15 words
The method as recited in claim 1 wherein the web consists essentially of glass fibers.
Claim 5
Dependent Claim
16 words
The method as recited in claim 1 wherein the web consists essentially of chopped glass fibers.
Claim 6
Dependent Claim
15 words
The method as recited in claim 1 wherein two polymers are co-calendered with a web.
Claim 7
Dependent Claim
10 words
The method of claim 1 wherein said web is flame-treated.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein both the polymer and the web are flame-treated.
Claim 9
Dependent Claim
61 words
An article of manufacture comprising a composite material produced by the steps of (a) extruding at least one polymer selected from the group consisting of ethylene/chlorotrifluoroethylene copolymer, ethylene/tetrafluoroethylene copolymer, polyvinylidene fluoride, copolyhexafluoroisopropylene - tetrafluoroethylene, vinylidene fluoride-tetrafluoroethylene copolymer, and polychlorotrifluoroethylene, (b) treating the surface of the extruded polymer with a flame, and (c) co-calendering the flame-treated polymer with at least one web.
Claim 10
Dependent Claim
61 words
An article of manufacture comprising a composite material produced by the steps of (a) extruding at least one polymer selected from the group consisting of ethylene/chlorotrifluoroethylene copolymer, ethylene/tetrafluoroethylene copolymer, polyvinylidene fluoride, copolyhexafluoroisopropylene - tetrafluoroethylene, vinylidene fluoride-tetrafluoroethylene copolymer, and polychlorotrifluoroethylene, (b) treating the surface of the extruded polymer with a flame, and (c) co-calendering the flame-treated polymer with at least one web.
Claim 11
Dependent Claim
14 words
The article as recited in claim 8 comprising two polymers co-calendered with a web.
Claim 12
Dependent Claim
15 words
The article as recited in claim 8 wherein the web is composed of glass fibers.
Claim 13
Dependent Claim
15 words
The article as recited in claim 8 wherein the web is a woven glass fabric.
Claim 14
Dependent Claim
10 words
The article of claim 8 wherein the web is flame-treated.
Claim 15
Dependent Claim
14 words
The article of claim 8 wherein both the polymer and the web are flame-treated.
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) | 1990-10-26 | 1991-04-27 | 1991-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-26 | 1995-04-27 | 1995-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-26 | 1999-04-27 | 1999-10-27 | $7700.00 | Window Closed / Lapsed |