US 12,269,221 B2
Fiber-reinforced resin molding material and method for manufacturing same, and fiber-reinforced resin molded article
Yukichi Konami, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Jul. 7, 2021, as Appl. No. 17/368,889.
Application 17/368,889 is a division of application No. 16/655,841, filed on Oct. 17, 2019, abandoned.
Application 16/655,841 is a continuation of application No. PCT/JP2018/016779, filed on Apr. 25, 2018.
Claims priority of application No. 2017-085860 (JP), filed on Apr. 25, 2017.
Prior Publication US 2021/0331428 A1, Oct. 28, 2021
Int. Cl. B29C 70/20 (2006.01); B29B 15/12 (2006.01); B29C 70/22 (2006.01); B29K 31/00 (2006.01); B29K 307/04 (2006.01)
CPC B29C 70/20 (2013.01) [B29B 15/122 (2013.01); B29C 70/22 (2013.01); B29K 2031/00 (2013.01); B29K 2307/04 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for manufacturing a fiber-reinforced resin molding material, the method comprising:
coating a resin composition on one surface of each of a first carrier film and a second carrier film; and
impregnating a reinforced fiber sheet with the resin composition after the coating by overlaying the first and second carrier films so that the surfaces coated by the resin composition face each other and in a state that the reinforced fiber sheet is put between the first and second carrier films, and conveying while pressing with a plurality of pressing rolls,
wherein the reinforced fiber sheet is one selected from the group consisting of (i) a woven fabric in which continuous fibers are woven and (ii) a non-crimp fabric comprising continuous fibers,
wherein the reinforcement fiber sheet has a basis weight in a range of from 200 to 3,000 g/m2,
wherein the reinforced fiber sheet is impregnated so that an amount of the resin composition in the fiber-reinforced resin molding material is in a range of from 25 to 55 vol. %, and
wherein, when a total amount of the resin composition contained in the fiber-reinforced resin molding material is 100 mass %, a thickness from a first surface in a thickness direction of the fiber-reinforced resin molding material to a position occupied by 10 mass % of the resin composition is represented by d1 (μm), and a thickness from a second surface opposite to the first surface to a position occupied by 10 mass % of the resin composition is represented by d2 (μm), an absolute value (|d1−d2|) of a difference between d1 and d2 is 50 μm or less.