US 12,447,717 B2
Multilayered body and method for manufacturing same
Nobuhiko Matsumoto, Hiratsuka (JP); Jin Nakamura, Hiratsuka (JP); Yuuki Sato, Hiratsuka (JP); and Atsushi Sakai, Hiratsuka (JP)
Assigned to Mitsubishi Gas Chemical Company, Inc., Tokyo (JP)
Appl. No. 17/601,375
Filed by Mitsubishi Gas Chemical Company, Inc., Tokyo (JP)
PCT Filed Mar. 4, 2020, PCT No. PCT/JP2020/009218
§ 371(c)(1), (2) Date Oct. 4, 2021,
PCT Pub. No. WO2020/203006, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-072709 (JP), filed on Apr. 5, 2019.
Prior Publication US 2022/0203651 A1, Jun. 30, 2022
Int. Cl. B32B 7/04 (2019.01); B32B 3/30 (2006.01); B32B 15/088 (2006.01); B32B 15/09 (2006.01)
CPC B32B 7/04 (2013.01) [B32B 3/30 (2013.01); B32B 15/088 (2013.01); B32B 15/09 (2013.01); B32B 2250/02 (2013.01); B32B 2262/106 (2013.01); B32B 2307/732 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A multilayered body comprising a metal layer having an uneven region with an average length (RSm) of a contour curve element from more than 1 μm to 9 μm or less, and a resin layer in contact with the uneven region of the metal layer,
the resin layer containing a thermoplastic resin and a fibrous filler,
the fibrous filler having a number average fiber diameter (F) of less than 1 μm, and
the fibrous filler having a ratio (RSm/F) of the average length (RSm) of the contour curve element of the uneven region to the number average fiber diameter (F) from 1 to 20000;
wherein a content of the fibrous filler in the resin layer is from 8 to 50 mass % and an amount of the fibrous filler with a number average fiber diameter of 1 μm or more is less than 1 mass % of the resin layer,
for a width (D2) of a resin filling a recessed part of the uneven region along a line drawn parallel to a metal surface at a point ¼ of a height of the resin from a bottom, D2 is greater than an opening diameter (D1) of the recessed part (D2>D1), and
a proportion of a ratio (D2/D1) of the ¼ point width (D2) to the opening diameter (D1) of 1.05 or greater in the multilayered body of the present invention is 40% or greater.