	US 12,257,815 B2
	Sandwich composite board and preparation method thereof
Xizong Liu, Zhengzhou (CN); Jicheng Zhang, Zhengzhou (CN); Huina Dong, Zhengzhou (CN); Fengxia He, Zhengzhou (CN); Xiangming Gong, Zhengzhou (CN); Dongjia Yao, Zhengzhou (CN); and Dongsheng Zhang, Zhengzhou (CN)
Assigned to GONG YI VAN-RESEARCH INNOVATION COMPOSITE MATERIAL CO. LTD, Henan (CN)
Appl. No. 18/014,954
Filed by GONG YI VAN-RESEARCH INNOVATION COMPOSITE MATERIAL CO. LTD, Henan (CN)
PCT Filed Jul. 6, 2021, PCT No. PCT/CN2021/104768 § 371(c)(1), (2) Date Jan. 6, 2023, PCT Pub. No. WO2022/007797, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 202010646043.2 (CN), filed on Jul. 7, 2020.
Prior Publication US 2023/0256725 A1, Aug. 17, 2023
Int. Cl. B29C 65/00 (2006.01); B32B 5/18 (2006.01); B32B 5/24 (2006.01); B32B 17/06 (2006.01); B32B 37/06 (2006.01); B32B 37/10 (2006.01); B32B 37/24 (2006.01)

CPC B32B 37/24 (2013.01) [B32B 5/18 (2013.01); B32B 5/245 (2013.01); B32B 17/066 (2013.01); B32B 37/06 (2013.01); B32B 37/10 (2013.01); B29C 65/00 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2260/023 (2013.01); B32B 2260/046 (2013.01); B32B 2264/303 (2020.08); B32B 2266/126 (2016.11); B32B 2309/02 (2013.01); B32B 2309/04 (2013.01); B32B 2309/12 (2013.01); B32B 2451/00 (2013.01)]

11 Claims

1. A sandwich composite board, comprising an upper panel layer, a core material layer and a lower panel layer in sequence from top to bottom, wherein the upper panel layer and the core material layer are integrally formed, and the lower panel layer and the core material layer are integrally formed; the upper panel layer and the lower panel layer are glass or fiber-reinforced resin-based composite sheets; and the core material layer consists of 30-70 parts by mass of aerogel, 10-35 parts by mass of a resin, and 2-4 parts by mass of an expandable microsphere foaming agent.