Patent ID: 8829108

Claim:
A sized fiber comprising a fiber having a coating of amorphous polyetherketoneketone, said coating comprising about 0.01 to about 10% by weight of the amount of coating in the sized fiber and having a thickness of about 1 micron to about 50 microns, and wherein said coating continuously surrounds said fiber surfaces, and wherein the amorphous polyetherketoneketone is comprised of repeating units represented by formulas I and II: -A-C(═O)—B—C(═O)— I -A-C(═O)-D-C(═O)— II wherein A is a p,p′-Ph-O-Ph- group, Ph is a phenylene radical, B is p-phenylene, and D is m-phenylene and the isomer ratio of formula I:formula II (T:I) ranges from about 55:45 to about 65:35.