JP2014028510A5 - - Google Patents

Claims (11)

An intermediate base material in which discontinuous reinforcing fibers are monofilamentally and randomly distributed in a thermoplastic resin, wherein the following constituent elements (I) and (II) are laminated together, and the constituent elements (I ) And (II) with respect to the total amount of component (II) is 30 to 70% by volume, and the aspect ratio of the reinforcing fiber in each of the following components (I) and (II) is 250 or more and 1000 or less and it meets the following VfI and VfII is 0.8VfI> VfII, thickness 0.1mm or more components of the intermediate base (II), in the range of less than 5.0 mm, intermediate base for press molding .
(I) Fiber reinforced thermoplastic resin sheet having a reinforcing fiber ratio VfI of 15% by volume to 40% by volume (II) Fiber reinforced thermoplastic resin having a reinforcing fiber ratio VfII of 5% by volume to less than 15% by volume Resin sheet The intermediate substrate for press molding according to claim 1, wherein a ratio of the component (II) to the total amount of the components (I) and (II) in the intermediate substrate is 40 to 60% by volume. The intermediate substrate for press molding according to claim 1 or 2, wherein an average aspect ratio of the discontinuous reinforcing fibers constituting the constituent elements (I) and (II) is 400 or more and 800 or less. The intermediate substrate for press molding according to any one of claims 1 to 3, wherein a proportion VfI of reinforcing fibers of the component (I) is 20% by volume or more and 30% by volume or less. The intermediate substrate for press molding according to any one of claims 1 to 4, wherein a ratio Vf of reinforcing fibers in the intermediate substrate for press molding is 10 vol% or more and 30 vol% or less. The intermediate substrate for press molding according to any one of claims 1 to 5, wherein the reinforcing fibers constituting the constituent elements (I) and (II) are carbon fibers. The thermoplastic resin constituting the constituent elements (I) and (II) comprises at least one selected from the group consisting of polyolefin, polyamide, polyarylene sulfide, and polyetheretherketone. An intermediate substrate for press molding according to claim 1. A preform for press molding in which a plurality of intermediate substrates for press molding according to any one of claims 1 to 7 are laminated. A method for producing a molded product, wherein the intermediate substrate or preform for press molding according to any one of claims 1 to 8 is placed in a mold cavity at a charge rate of 50% or more and less than 100% and then press-molded. The method for producing a molded product according to claim 9, wherein the press molding means is stamping molding or heat and cool molding. The method for producing a molded product according to claim 9 or 10, wherein the molded product is used as an automobile interior / exterior, an electric / electronic device casing, a bicycle, an aircraft interior material, or a transport box.