US 12,220,841 B2
Preform and method of producing same
Yusuke Tsumura, Nagoya (JP); Yuki Mitsutsuji, Nagoya (JP); and Takashi Hasegawa, Nagoya (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/911,877
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Dec. 22, 2020, PCT No. PCT/JP2020/047904
§ 371(c)(1), (2) Date Sep. 15, 2022,
PCT Pub. No. WO2021/192464, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 2020-052611 (JP), filed on Mar. 24, 2020.
Prior Publication US 2023/0113270 A1, Apr. 13, 2023
Int. Cl. B32B 3/26 (2006.01); B29B 11/16 (2006.01); B29C 70/20 (2006.01)
CPC B29B 11/16 (2013.01) [B29C 70/20 (2013.01); B32B 3/266 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A preform prepared by stacking two or more prepreg cut materials each of which is made by cutting a sheet-like prepreg into an outline of a predetermined shape, the sheet-like prepreg comprising reinforcing fibers aligned in one direction and a matrix resin, wherein at least one prepreg cut material has first incisions regularly distributed throughout the whole in-plane region and a second incision provided only in a predetermined specific region and longer than the first incision, wherein the second incision has at least one divergent point.