US 12,267,954 B2
Fluororesin composition, fluororesin sheet, laminate and substrate for circuits
Hirokazu Komori, Osaka (JP); Hiroyuki Yoshimoto, Osaka (JP); Masaji Komori, Osaka (JP); Yuki Ueda, Osaka (JP); and Junpei Terada, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
Filed on Mar. 8, 2024, as Appl. No. 18/600,472.
Application 18/600,472 is a continuation of application No. 17/279,629, granted, now 11,963,297, previously published as PCT/JP2019/050635, filed on Dec. 24, 2019.
Claims priority of application No. 2019-003130 (JP), filed on Jan. 11, 2019.
Prior Publication US 2024/0215161 A1, Jun. 27, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H05K 1/03 (2006.01); B32B 5/02 (2006.01); B32B 15/082 (2006.01); B32B 15/20 (2006.01); B32B 17/10 (2006.01); B32B 27/12 (2006.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); C08F 214/26 (2006.01); C08J 5/18 (2006.01); C08K 3/36 (2006.01); C08K 7/18 (2006.01)
CPC H05K 1/0366 (2013.01) [B32B 5/022 (2013.01); B32B 5/024 (2013.01); B32B 15/082 (2013.01); B32B 15/20 (2013.01); B32B 17/10 (2013.01); B32B 27/12 (2013.01); B32B 27/20 (2013.01); B32B 27/322 (2013.01); C08F 214/262 (2013.01); C08J 5/18 (2013.01); C08K 3/36 (2013.01); C08K 7/18 (2013.01); B32B 2262/101 (2013.01); B32B 2264/1021 (2020.08); B32B 2457/08 (2013.01); C08F 2800/10 (2013.01); C08J 2327/18 (2013.01); H05K 2201/015 (2013.01)] 3 Claims
 
1. A laminate, comprising:
a fluororesin sheet; and
a base material,
wherein the fluororesin sheet comprises a fluororesin composition comprising: a melt moldable fluororesin; and a silica,
wherein the melt moldable fluororesin is a tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymer and/or a tetrafluoroethylene-hexafluoropropylene copolymer and has 25 or more carbonyl group-containing functional groups per 106 main-chain carbon atoms;
the silica is a spherical silica;
a blending ratio of the spherical silica to a total amount of the melt moldable fluororesin and the silica is 50% by mass or higher and 70% by mass or lower;
the fluororesin composition has a linear expansion coefficient of 100 ppm/° C. or lower and
a melt flow rate (MFR) of 1.0 g/10 min or higher and 30 g/10 min or lower.