US 12,331,176 B2
Method for producing prepreg and method for molding composite material
Kiichi Nishiguchi, Tokyo (JP); and Hiromichi Akiyama, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES AERO ENGINES, LTD., Komaki (JP)
Appl. No. 18/018,627
Filed by MITSUBISHI HEAVY INDUSTRIES AERO ENGINES, LTD., Aichi (JP)
PCT Filed Sep. 10, 2021, PCT No. PCT/JP2021/033295
§ 371(c)(1), (2) Date Jan. 30, 2023,
PCT Pub. No. WO2022/059613, PCT Pub. Date Mar. 24, 2022.
Claims priority of application No. 2020-156244 (JP), filed on Sep. 17, 2020.
Prior Publication US 2023/0312850 A1, Oct. 5, 2023
Int. Cl. C08J 5/24 (2006.01)
CPC C08J 5/24 (2013.01) [C08J 2300/00 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for producing a prepreg in which the prepreg is produced by impregnating a reinforcing fiber preform with a resin, the method comprising:
a step of preparing a first resin which is the resin containing a filler, and a second resin which is the resin without containing the filler;
a step of disposing the second resin to be adjacent to the reinforcing fiber preform;
a step of disposing the first resin to be adjacent to at least one of the reinforcing fiber preform and the second resin; and
a step of impregnating the reinforcing fiber preform with the second resin, wherein
in the step of disposing the first resin, the first resins are disposed on both sides of the reinforcing fiber preform and the second resin which are adjacent to each other, and
one of the first resins disposed on both sides is a third resin which is the resin containing a first filler and a first dispersant, and the other of the first resins disposed on both sides is a fourth resin which is the resin containing a second filler and a second dispersant.