US 11,872,773 B2
Method for producing fiber-reinforced plastic
Kentaro Adachi, Ehime (JP); Yuzo Fujita, Ehime (JP); and Takuya Karaki, Ehime (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 16/482,436
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Jan. 19, 2018, PCT No. PCT/JP2018/001529
§ 371(c)(1), (2) Date Jul. 31, 2019,
PCT Pub. No. WO2018/142963, PCT Pub. Date Aug. 9, 2018.
Claims priority of application No. 2017-017327 (JP), filed on Feb. 2, 2017.
Prior Publication US 2020/0247071 A1, Aug. 6, 2020
Int. Cl. B29C 70/34 (2006.01); B29C 43/34 (2006.01); B29C 65/02 (2006.01); B29C 65/18 (2006.01)
CPC B29C 70/34 (2013.01) [B29C 43/34 (2013.01); B29C 65/022 (2013.01); B29C 65/18 (2013.01); B29C 2791/001 (2013.01); B29C 2793/0009 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for producing a fiber-reinforced plastic using a sheet substrate A,
the sheet substrate A being a substrate including one or more sheets of incised prepreg a,
the incised prepreg a being a prepreg including unidirectionally oriented reinforcing fibers and a resin and having a plurality of incisions dividing the reinforcing fibers formed in the prepreg,
the method for producing a fiber-reinforced plastic comprising a placement step (A) of placing a plurality of sheet substrates A in a mold such that each of the sheet substrates A forms an overlapping portion in which the sheet substrate A overlaps one or more other sheet substrates A and a non-overlapping portion in which the sheet substrate A does not overlap any other sheet substrates A, and a molding step of heating and pressing the plurality of sheet substrates A, and
a total area of the overlapping portion and the non-overlapping portion is 50 to 100% relative to the area of a mold surface;
wherein:
the ratio of the total of the area of the overlapping portion to the total of the area of the non-overlapping portion (“the total of the area of the overlapping portion”/“the total of the area of the non-overlapping portion”) is 0.05 to 0.8;
there is no empty space between the overlapping portion to be bonded; and
the overlapping portion and the non-overlapping portion comprise unidirectional fibers.