Fabric structure for fiber reinforced plastics
AssigneeToray Industries, Inc.
InventorsAkira Nishimura, Kyuichiro Nishimura
Life of this patent
Estimating the term…
Abstract
Disclosed is a fabric structure for fiber reinforced plastics, which comprises at least two yarn groups composed of straight reinforcing filamentary yarns composed of carbon fibers being free of bends and gathered in one direction in the form resembling a sheet, wherein the yarn groups are integrated with each other by auxiliary filamentary yarns so that the sheet-like faces of the yarn groups are made to confront each other and reinforcing filamentary yarns of one yarn group intersect reinforcing filamentary yarns of the other yarn group, and the auxiliary filamentary yarns have a higher elongation at break than that of the reinforcing filamentary yarns.
Claims21
A reinforcing fibrous structure for use in fiber reinforced plastics, which comprises (a) a yarn group A composed of a plurality of straight reinforcing filamentary yarns of carbon fibers gathered in one direction in parallel to one another in the form resembling a sheet, (b) a yarn group B composed of a plurality of straight reinforcing filamentary yarns of carbon fibers gathered in one direction in parallel to one another in the form resembling a sheet, the sheet face of the yarn group B confronting the sheet face of the yarn group A and the reinforcing filamentary yarns of the yarn group B intersecting the reinforcing filamentary yarns of the yarn group A, and (c) auxiliary filamentary yarns which hold integrally said yarn groups A and B, said auxiliary filamentary yarns having a higher elongation at break than those of the reinforcing filamentary yarns of both the yarn groups A and B wherein the shrinkage at 120.degree. C. of the auxiliary filamentary yarns is not more than 2 percent and the cross-sectional area of the reinforcing filamentary yarns is at least 3 times the cross-sectional area of the auxiliary filamentary yarns.
A reinforcing fibrous structure for use in fiber reinforced plastics, which comprises (a) a yarn group A composed of a plurality of straight reinforcing filamentary yarns of carbon fibers gathered in one direction parallel to one another in the form resembling a sheet, (b) a yarn group B composed of a plurality of straight reinforcing filamentary yarns of carbon fibers gathered in one direction in parallel to one another in the form resembling a sheet, the sheet face of the yarn group B confronting the sheet face of the yarn group A and the reinforcing filamentary yarns of yarn group B intersecting the reinforcing filamentary yarns of yarn group A, and (c) auxiliary filamentary yarns which hold integrally said yarn groups A and B;
- said auxiliary filamentary yarns having an elongation at break of at least two times the elongation at break of the reinforcing filamentary yarns of both the yarn groups A and B, and shrinkage of not more than 2 percent at 120.degree. C.;
- said reinforcing filamentary yarns having a rigidity of at least five times the rigidity of the auxiliary filamentary yarns and a cross-sectional area of at least three times the cross-sectional area of the auxiliary filamentary yarns.
Dependencies are inferred from the claim text.