Flexible multiply towpreg tape from powder fusion coated towpreg

Details Flexible multiply towpreg tape from powder fusion coated towpreg Flexible multiply towpreg tape from powder fusion coated towpreg

1993-11-10

1995-04-25

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including grain, strips, or filamentary elements in...

428294, 428332, 428902, B32B 512

Patent

active

054097576

ABSTRACT:
An improved flexible towpreg tape of a known geometry and a method of production therefor. The improved flexible towpreg tape is formed from a plurality of reinforcing filaments fusion coated with matrix forming material, the reinforcing filaments being substantially wet-out by the matrix forming material, and the towpreg tape having multiple plies with an average thickness less than about 100 microns. The method of production for the improved flexible towpreg tape includes the steps of coating the reinforcing filaments with the matrix forming material in a manner causing interfacial adhesion of the matrix forming material to the reinforcing filaments; forming a towpreg by heating the matrix forming material contacting the reinforcing filaments until the matrix forming material liquefies and coats the reinforcing filaments; and forming the towpreg tape under pressure and elevated temperature in a means for creating a known tape geometry.

REFERENCES:
patent: 5128198 (1992-07-01), Dyksterhouse et al.
patent: 5188878 (1993-02-01), Takezawa et al.
patent: 5198281 (1993-03-01), Muzzy et al.
patent: 5279893 (1994-01-01), Hattori et al.

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