US 11,872,779 B2
Method for producing composite material joined body
Hiromichi Akiyama, Tokyo (JP); and Kiyoka Takagi, Tokyo (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 17/625,970
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
PCT Filed May 26, 2020, PCT No. PCT/JP2020/020785
§ 371(c)(1), (2) Date Jan. 10, 2022,
PCT Pub. No. WO2021/010028, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019-131067 (JP), filed on Jul. 16, 2019.
Prior Publication US 2022/0242070 A1, Aug. 4, 2022
Int. Cl. B32B 41/00 (2006.01); B29C 70/54 (2006.01); B29C 33/60 (2006.01); B29C 70/30 (2006.01)
CPC B29C 70/54 (2013.01) [B29C 33/60 (2013.01); B29C 70/30 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A method for producing a composite material joined body in which a first composite material and a second composite material are bonded together without using an adhesive, the method comprising:
fabricating the first composite material by completely curing a first prepreg laminate to which a release member is attached, the release member being made of a material that does not transfer silicone and fluorine to the first prepreg laminate;
peeling off the release member from the first composite material, and then performing surface treatment for imparting a polar functional group to a surface of the first composite material, to which the release member has been attached, to activate the surface; and
fabricating the second composite material bonded to the first composite material, by directly disposing a second prepreg laminate on the activated surface of the first composite material and curing the second prepreg laminate.