Non-woven flexible multiply towpreg fabric

Stock material or miscellaneous articles – Structurally defined web or sheet – Including stitching and discrete fastener – coating or bond

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Details

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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