EP0156599A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Composite carbon fibre and thermoplastic fiber blends
Assignee: BASF SE
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Filing: 1985-03-14
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Granted: —
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Expires: 2005-03-14
Abstract
Abstract The invention provides fibrous tows which may be formed into polymeric plastic composites. The tows may be prepared by a process involving the steps of (a) forming a carbon fiber tow; (b) forming a thermoplastic polymeric fiber tow; (c) intermixing the two tows; and (d) withdrawing the intermixed tow for further use.
Inventors
- 👤 Paul E. Mcmahon
- 👤 Tai-Shung Chung
- 👤 Lincoln Ying
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 20:55
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/40; D02G3/402; A; A63; A63B; A63B51/00; A63B51/02; B; B29; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; B29C70/28; B29C70/40; B29C70/50; B29K; B29K2105/00; B29K2105/0079; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2301/00; B29K2301/12; B29K2307/00; B29L; B29L2031/00; B29L2031/52; B29L2031/5245
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
55 words
A continuous fiber tow useful in forming composite articles which comprises an intimate blend of 90 to 30% by volume, based on the total fiber content, of a spun thermoplastic fiber having a melt point of at least 50°C. and 10 to 70% by volume, based on the total fiber content, of a carbon fiber.
Claim 2
Dependent Claim
55 words
A continuous fiber tow useful in forming composite articles which comprises an intimate blend of 90 to 30% by volume, based on the total fiber content, of a spun thermoplastic fiber having a melt point of at least 50°C. and 10 to 70% by volume, based on the total fiber content, of a carbon fiber.
Claim 3
Dependent Claim
25 words
The tow of claim 1 wherein the amount of thermoplastic fiber is 80 to 40%, and the amount of carbon fiber is 20 to 60%.
Claim 4
Dependent Claim
18 words
The tow of claim 1 or 2 wherein the carbon fibers are prepared from polyacrylonitrile polymers and copolymers.
Claim 5
Dependent Claim
16 words
The tow of claim 1 or 2 wherein the carbon fibers are formed from pitch blend.
Claim 6
Dependent Claim
32 words
The tow of any of claims 1 - 4 wherein the thermoplastic polymer fiber is selected from polyethylene, polypropylene, polyesters, nylons, polyamidimides,polyetherimides, polyether sulfones, polyether ether ketones, and wholly aromatic polyester resins.
Claim 7
Dependent Claim
18 words
The tow of any of claims 1 - 4 wherein the thermoplastic polymer is a liquid crystal polymer.
Claim 8
Dependent Claim
56 words
A process for preparing a fiber tow useful in forcing composite articles which comprises: (a) forming a carbon fiber tow; (b) forming a continuous tow of spun thermoplastic polymer fibers having a melting point of at least 50°C; (c) intermixing the carbon fiber tow and the thermoplastic polymer fiber tow; and (d) withdrawing the intermixed tow.
Claim 9
Dependent Claim
56 words
A process for preparing a fiber tow useful in forcing composite articles which comprises: (a) forming a carbon fiber tow; (b) forming a continuous tow of spun thermoplastic polymer fibers having a melting point of at least 50°C; (c) intermixing the carbon fiber tow and the thermoplastic polymer fiber tow; and (d) withdrawing the intermixed tow.
Claim 10
Dependent Claim
17 words
The process of claim 7 wherein the intermixing is performed by means of a gas intermixing means.
Claim 11
Dependent Claim
29 words
The process of claim 8 wherein the gas intermixing means comprises a gas box having a gas impingement means which directs a generally perpendicular gas flow onto the fibers.
Claim 12
Dependent Claim
41 words
The process of claim 7 wherein the intermixing means is a longitudinally extended rod wherein the carbon fiber tow and the thermoplastic fiber tow are brought into simultaneous contact in the same area of the rod in a relatively tension-free state.
Claim 13
Dependent Claim
11 words
The process of claim 10 wherein a second rod is employed.
Claim 14
Dependent Claim
24 words
The process of any of claims 7 - 9 wherein the intermixing process is carried out with the fibers in a relatively tension-free state.
Claim 15
Dependent Claim
20 words
The process of any of claims 7-12 wherein the tow is as defined in any of claims 1 - 6.
Claim 16
Dependent Claim
79 words
A process for forming a composite article which comprises applying to a mold an intimately intermixed, continuous fiber tow containing a mixture of 90 to 30% by volume, based on the total fiber content, of a spun thermo- 0 plastic fiber having a melting point of at least 50 C., and 10 to 70% by volume, based on the total fiber content, of a carbon fiber, and heating the tow to above the melting point of the thermoplastic fiber.
Claim 17
Dependent Claim
79 words
A process for forming a composite article which comprises applying to a mold an intimately intermixed, continuous fiber tow containing a mixture of 90 to 30% by volume, based on the total fiber content, of a spun thermo- 0 plastic fiber having a melting point of at least 50 C., and 10 to 70% by volume, based on the total fiber content, of a carbon fiber, and heating the tow to above the melting point of the thermoplastic fiber.
Claim 18
Dependent Claim
21 words
The process of claim 14 wherein the intimately intermixed fiber tow is applied to a mold employing a filament winding process.
Claim 19
Dependent Claim
21 words
The process of claim 14 wherein the fiber tow is applied to a mold in the form of a woven fabric.
Claim 20
Dependent Claim
15 words
The process of any of claims 14-16 wherein the composite article is a recreational article.
Claim 21
Dependent Claim
14 words
The process of claim 17 wherein the composite article is a tennis racquet frame.
References Cited (Backward Citations)
US3978267A
Cited
FR2124919A5
Cited
US4051660A
Cited
US4084399A
Cited
US4159618A
Cited
FR2446336A1
Cited
BE894875A
Cited
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