Carbon fiber nonwoven fabric sheet, method for producing same and carbon fiber reinforced resin molded body using same

Abstract

A carbon fiber nonwoven fabric sheet 15 contains discontinuous carbon fibers. The carbon fiber nonwoven fabric sheet 15 is an elongated parallel web 14 in which two or more rectangular fiber webs 10 having carbon fibers oriented substantially in one direction are stacked in the same direction with their end portions shifted from each other. With a method for producing the same, a fiber web is formed by opening discontinuous carbon fibers using a carding machine, and orienting the carbon fibers substantially in one direction, rectangular fiber webs 10 are formed by cutting the fiber web in a width direction or an oblique direction, an elongated parallel web 14 is formed by stacking the rectangular fiber webs 10 on each other with their end portions shifted from each other, and a carbon fiber nonwoven fabric sheet 15 is obtained by cutting both ends of the elongated parallel web 14. A carbon fiber reinforced resin molded body according to the present invention contains the carbon fiber nonwoven fabric sheet and a matrix resin. As a result, the present invention provides a carbon fiber nonwoven fabric sheet that can be used in the same manner as that for a uniaxial sheet constituted of a continuous carbon fiber sheet, a method for producing the same, and a carbon fiber reinforced resin molded body.

Dependencies are inferred from the claim text.