Patent ID: 6284831
Filing Date: 2001-09-04
Classification: C08J,C08K,C08L

Abstract:
A fiber-reinforced resin molded article of a fiber reinforcement-containing polyolefin composition mainly comprising a long fiber reinforcement, a short fiber reinforcement, and a modified polyolefin, said molded article being prepared by injection-molding a fiber reinforcement-containing polyolefin composition comprising:a polyolefin resin component comprising at least one modified polyolefin selected from the group consisting of a graft-modified polyolefin and an ionomer, the graft-modified polyolefin being prepared by modifying an unmodified polyolefin with at least one modifier selected from the group consisting of an organosilane compound, an unsaturated carboxylic acid, and an unsaturated carboxylic anhydride;a long fiber reinforcement comprising long, nearly parallel fibers having an average fiber diameter of 3 to 21 .mu.m, the long, nearly parallel fibers being arranged and dispersed in a pellet having a length of 3 to 30 mm prepared by molding the polyolefin resin component; anda short fiber reinforcement comprising short fibers having an average fiber length of 0.1 to 2 mm, the short fibers being randomly dispersed in the pellet whereinthe polyolefin resin component, the long fiber reinforcement, and the short fiber reinforcement are present in amounts of 20 to 90% by weight, 5 to 76% by weight, and 0.5 to 40% by weight, respectively;the weight ratio of the long fiber reinforcement to the short fiber reinforcement is within the range from 1/1 to 19/1; andthe weight ratio of the polyolefin resin component to the total weight of the long fiber reinforcement and the short fiber reinforcement is within the range from 1/0.25 to 1/9.