Unidirectional carbon fiber reinforced pultruded composite mater

Details Unidirectional carbon fiber reinforced pultruded composite mater Unidirectional carbon fiber reinforced pultruded composite mater

1993-03-23

1994-06-28

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

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

428220, 428288, 428294, 428408, 428375, 428397, 428401, 428902, 244117R, 244119, B32B 512, B32B 900, D04H 300, B64C 100

Patent

active

053245636

ABSTRACT:
A pultruded shaped composite material of carbon fiber having a diameter not greater than 0.001 inch aligned linearly with a degree of waviness defined by an average amplitude to length (A/L) ratio of less than 0.9 percent, the matrix formed around the fiber and solidified or cured into a rigid form that will not melt during subsequent processing steps to prevent an increase in waviness during subsequent processing steps. The matrix material consists essentially of a resin present in the range of about 10 to 50 percent by volume of the composite material. The A /L ratio is determined by measuring the distribution of angularity found in the aligned carbon fibers in a selective cross section cut at five degrees to the fiber plane, wherein the standard deviation for a 300 sample angularity measurement is not greater than 0.88 degrees.

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