Carbon-fiber chopped strand and manufacturing method of the same

摘要

Disclosed is a carbon-fiber chopped strand, and a manufacturing method of the same. The carbon-fiber chopped strand is composed of single filaments composed of 30,000-120,000 carbon fibers, and a sizing agent content 1-10% by weight that bundles the single filaments; the ratio of maximum diameter (Dmax) in the cross section and minimum diameter (Dmin) is 1.0-1.8, a length along a fiber direction is 3-10 mm, and a repose angle of 10-30°.

主权项

1. A carbon-fiber chopped strand composed of 30,000 to 120,000 carbon fiber single filaments and 1 to 10 mass % of a sizing agent which bundles the single filaments, in which the single-filament diameter of carbon fiber is 3 to 15 μm, carbon-fiber chopped strand the ratio (Dmax/Dmin) of the maximum diameter (Dmax) and the minimum diameter (Dmin) in a section intersecting at right angles with the fiber axis direction of chopped strand is 1.0 to 1.8, the length (L) of chopped strand along the fiber direction is 3 to 10 mm, the ratio (L/Dmin) of the length (L) of chopped strand along the fiber direction and the minimum diameter (Dmin) of chopped strand is 4 or smaller, and the repose angle of chopped strand is 10 to 30°.