Non-woven flexible multiply towpreg fabric

Details Non-woven flexible multiply towpreg fabric Non-woven flexible multiply towpreg fabric

1992-03-09

1993-03-30

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including stitching and discrete fastener, coating or bond

156148, 156163, 156180, 156290, 1563082, 428105, 428114, 428198, 428296, 428300, B32B 306

Patent

active

051982811

ABSTRACT:
A non-woven towpreg fabric and a method of production therefor. The non-woven towpreg fabric is fabricated from a plurality of flexible, multiply towpregs, comprising towpreg plies which comprise reinforcing filaments substantially wetout by a matrix forming material, which then are bonded together to form the fabric. The method of production for the non-woven towpreg fabric involves spreading the reinforcing filaments, coating the reinforcing filaments with the matrix forming material in a manner causing interfacial adhesion, forming the towpreg plies by heating the matrix forming material until the matrix forming material liquefies and coats the reinforcing filaments, cooling the towpreg plies in a manner while said towpregs remain substantially unconsolidated until the matrix forming material solidifies, overlapping a plurality of the towpreg plies, and bonding the towpreg plies together. Multidimensional fabrics, preforms and composite articles also can be formed by this invention.

REFERENCES:
patent: 4534919 (1985-08-01), McAhley et al.
patent: 4714642 (1987-12-01), McAhley et al.
patent: 4714648 (1987-12-01), Nagato
patent: 5122417 (1992-06-01), Murakami et al.
patent: 5128199 (1992-07-01), Iyer et al.

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