US4581275A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Base cloth for reinforcement
Assignee: Kurashiki Spinning Co Ltd
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Filing: 1984-12-03
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Granted: 1986-04-08
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Expires: 2004-12-03
Abstract
Abstract The present invention provides a base cloth for reinforcement produced by winding a weldable yarn on either one of a warp or weft or the both at a definite interval, arranging the warp and weft in the respective directions and then thermally welding the both yarns. According to this method, the fraying of warp or weft, particularly easy fluffing of carbon fibers, etc. can be prevented by winding the weldable yarn. And, it is sufficient for the weldable yarn to be present at the intersections between the warp and weft. Consequently, as compared with a case wherein the whole weft is impregnated with adhesives, penetration of the matrix resin can sufficiently be attained and thus, strength in the weft direction can be improved.
Inventors
- 👤 Masao Endo
- 👤 Katsushi Tsujii
- 👤 Hiromi Mishima
- 👤 Masayuki Fukui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:29
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/69; B29C65/00; B29C65/02; B29C66/80; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/22; B29C70/226; D; D02; D02G; D02G3/00; D02G3/22; D02G3/40; D02G3/44; D02G3/447; D04; D04H; D04H3/00; D04H3/02; D04H3/04; D04H3/08; D04H3/12; E; E04; E04C; E04C5/00; E04C5/07; B29C66/70; B29C66/71; B29C66/83421; B29C66/83423; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24124; Y10T428/249921; Y10T428/249924; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2936
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A base cloth for reinforcement which comprises a warp and a weft each comprising a set for parallel yarns running in the machine direction and cross-machine direction, respectively, the weft being on at least one of the surfaces formed by the warp, and a thermoplastic weldable yarn weldable to both the warp and the weft and having a lower melting point than that of the warp and weft, the weldable yarn wound on at least one of the warp and weft and adhering the warp and the weft at a plurality of intersections therebetween.
Claim 2
Dependent Claim
94 words
A base cloth for reinforcement which comprises a warp and a weft each comprising a set for parallel yarns running in the machine direction and cross-machine direction, respectively, the weft being on at least one of the surfaces formed by the warp, and a thermoplastic weldable yarn weldable to both the warp and the weft and having a lower melting point than that of the warp and weft, the weldable yarn wound on at least one of the warp and weft and adhering the warp and the weft at a plurality of intersections therebetween.
Claim 3
Dependent Claim
26 words
A base cloth as described in claim 1, wherein the apparent width of the weldable yarn on the core yarn is not more than 2 mm.
Claim 4
Dependent Claim
22 words
A base cloth as described in claim 2, wherein the warp and weft are a non-twist or soft twist yarn of multifilaments.
Claim 5
Dependent Claim
19 words
A base cloth as described in claim 2, wherein the warp and weft are a high-strength and high-modulus multifilament.
Claim 6
Dependent Claim
22 words
A base cloth as described in claim 4, wherein the multifilament is carbon fiber, graphite fiber, aromatic polyamide fiber or glass fiber.
Claim 7
Dependent Claim
33 words
A base cloth as described in claim 2, wherein the weldable yarn is polyethylene yarn, polypropylene yarn, nylon copolymer yarn, polyvinyl chloride yarn, polyvinylidene chloride yarn, polyethylene/vinyl acetate yarn or conjugated yarns thereof.
Claim 8
Dependent Claim
35 words
A base cloth as described in claim 1, wherein the number of windings of the weldable yarn is selected such that the weldable yarn is substantially present at all intersections between the warp and weft.
Claim 9
Dependent Claim
13 words
A base cloth as described in claim 1 intended for composite molded products.
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) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |