LAMINATE WITH A PEELABLE TOP LAYER AND METHOD OF PEELING OFF THE TOP LAYER FROM THE LAMINATE

摘要

PURPOSE: Provided are a laminate with a peelable top layer, which can be used as building materials that survive severe use conditions for an extended time and be easily recycled after use, and a method of peeling off the top layer from the laminate for the recycling. CONSTITUTION: The laminate comprises a peelable top layer, a substrate, and a bonding layer between the top layer and the substrate, wherein at least one of the substrate and the top layer is porous and an adhesive for forming the bonding layer comprises the following components: (A) an aqueous dispersion containing a polymer, which has properties that a dried film of the aqueous dispersion has a tensile strength of 1 to 28 MPa and a percentage elongation of 100 to 2000 %; and (B) a water-based adhesive composition containing microspheres with thermal expansion capability, each of which is composed of a polymer shell encapsulating a gas.