US 11,724,423 B2
Mold release film and method for producing laminate
Nobuaki Sasaki, Tokyo (JP); and Yoshihide Sato, Tokyo (JP)
Assigned to Mitsubishi Chemical Corporation, Tokyo (JP)
Filed by Mitsubishi Chemical Corporation, Tokyo (JP)
Filed on Apr. 11, 2022, as Appl. No. 17/718,173.
Application 17/718,173 is a division of application No. 16/883,302, filed on May 26, 2020.
Application 16/883,302 is a continuation of application No. PCT/JP2018/044186, filed on Nov. 30, 2018.
Claims priority of application No. 2017-230400 (JP), filed on Nov. 30, 2017; and application No. 2018-069614 (JP), filed on Mar. 30, 2018.
Prior Publication US 2022/0242012 A1, Aug. 4, 2022
Int. Cl. B29C 33/68 (2006.01); B32B 3/30 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01)
CPC B29C 33/68 (2013.01) [B32B 3/30 (2013.01); B32B 7/12 (2013.01); B32B 27/08 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for producing a laminate, the method comprising
sequentially laminating a support, an adhesive sheet including an adhesive layer, and the mold release film, thereby producing the laminate,
wherein the mold release film comprises a concave-convex layer having a concave-convex structure on the surface of at least one surface side of a substrate,
wherein the concave-convex layer is a cured product formed of a phase separation composition comprising a component A, a component B, a crosslinking initiator C, and a mixed solution Z composed of a solution X and a solution Y,
component A and the component B both comprise an acrylic polymer,
a boiling point of the solution Y is higher than that of the solution X,
and the concave-convex structure comprises a structure in which a convex portion of the concave-convex structure forms an irregular and continuous shape in a plan view, and
wherein the concave-convex structure is transferred to one surface of the adhesive layer to be laminated with the mold release film by laminating the adhesive layer on the surface of the concave-convex layer of the mold release film (referred to as “concave-convex layer surface”), and the support is laminated on another surface of the adhesive sheet.