	US 12,330,404 B2
	Laminates having perforated structural body
Tomohiro Ono, Tsukuba (JP); and Kanayo Nakada, Tsukuba (JP)
Assigned to KURARAY CO., LTD., Kurashiki (JP)
Appl. No. 17/417,447
Filed by KURARAY CO., LTD., Kurashiki (JP)
PCT Filed Dec. 25, 2019, PCT No. PCT/JP2019/051016 § 371(c)(1), (2) Date Jun. 23, 2021, PCT Pub. No. WO2020/138237, PCT Pub. Date Jul. 2, 2020.
Claims priority of application No. 2018-245071 (JP), filed on Dec. 27, 2018.
Prior Publication US 2022/0055361 A1, Feb. 24, 2022
Int. Cl. B32B 27/30 (2006.01); B32B 3/26 (2006.01)

CPC B32B 27/308 (2013.01) [B32B 3/266 (2013.01); B32B 2250/02 (2013.01); B32B 2307/748 (2013.01); B32B 2405/00 (2013.01)]

9 Claims

1. A laminate, comprising:

a substrate; and

a structural body disposed on the surface of at least one side of the substrate,

the structural body comprising a base portion and a through hole in the base portion,

wherein

the base portion including the through hole directly contacts the substrate,

the base portion of the structural body comprises not less than 80% by mass of an acrylic triblock copolymer (I) and is free from tackifier resins,

the acrylic triblock copolymer (I) comprising two polymer blocks (A1) and (A2) each including methacrylic acid ester units and one polymer block (B) including acrylic acid ester units of formula (1)

CH₂═CH—COOR¹ (1)

wherein R¹denotes a C4-C12 organic group,

the acrylic triblock copolymer (I) having an (A1)-(B)-(A2) block structure and a weight average molecular weight of 50,000 to 250,000, and

the total content of the polymer blocks (A1) and (A2) is not more than 35 mass % of the acrylic triblock copolymer (I).