US 12,076,943 B2
Fiber-reinforced composite material and sandwich structure
Naokichi Imai, Ehime (JP); Kotaro Shinohara, Ehime (JP); and Masato Honma, Ehime (JP)
Assigned to Toray Industries, Inc., Tokyo (JP)
Appl. No. 17/778,073
Filed by Toray Industries, Inc., Tokyo (JP)
PCT Filed Nov. 16, 2020, PCT No. PCT/JP2020/042587
§ 371(c)(1), (2) Date May 19, 2022,
PCT Pub. No. WO2021/106650, PCT Pub. Date Jun. 3, 2021.
Claims priority of application No. 2019-216112 (JP), filed on Nov. 29, 2019.
Prior Publication US 2022/0410502 A1, Dec. 29, 2022
Int. Cl. B29C 70/14 (2006.01); B29C 53/24 (2006.01); B29C 65/00 (2006.01); B29C 70/40 (2006.01); B29D 99/00 (2010.01); B32B 3/28 (2006.01); B29K 105/00 (2006.01); B29K 307/04 (2006.01); B29L 7/00 (2006.01)
CPC B29C 70/14 (2013.01) [B29C 53/24 (2013.01); B29C 66/721 (2013.01); B29C 70/40 (2013.01); B29D 99/0089 (2013.01); B32B 3/28 (2013.01); B29K 2105/256 (2013.01); B29K 2307/04 (2013.01); B29K 2995/0096 (2013.01); B29L 2007/002 (2013.01); B32B 2250/20 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2305/026 (2013.01); B32B 2305/076 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A The fiber-reinforced composite material comprising:
a resin (A), wherein the resin (A) is a thermoplastic resin; and
a reinforcing fiber (B), wherein the reinforcing fiber (B) is a discontinuous fiber having a number average fiber length of 1 mm or more and 50 mm or less, and including:
a fiber-reinforced structure portion including an in-plane orientation portion having an average fiber orientation angle of the reinforcing fiber (B) of 0° or more and 45° or less and an out-of-plane orientation portion having an average fiber orientation angle of the reinforcing fiber (B) of more than 45° and 90° or less; and
a tunnel-shaped cavity portion defined by the in-plane orientation portion and the out-of-plane orientation portion of the fiber-reinforced structure portion,
wherein the tunnel-shaped cavity portion extends in an in-plane direction of the fiber reinforced composite material, and
wherein the in-plane direction is orthogonal to a thickness direction of the fiber reinforced composite material.