METHOD FOR PRODUCING MULTILAYER FOAM SHEET

摘要

Provided are: a foamed layered sheet which has improved contamination resistance; and a novel method for producing a layered sheet that is useful for the production of the foamed layered sheet. A method for producing a layered sheet in which a foaming agent-containing resin layer and a surface protective layer are sequentially formed on a base material. This method for producing a layered sheet is characterized in that the surface protective layer is formed of a monolayer or multilayer structure and at least one layer constituting the surface protective layer contains a polyethylene and/or an ethylene copolymer, and this method is also characterized by comprising the following steps 1-3. (1) step 1 including forming the foaming agent-containing resin layer on the base material; (2) step 2 including forming the surface protective layer on the foaming agent-containing resin layer by extrusion film forming; and (3) step 3 including applying an electron beam from the surface protective layer side to crosslink the polyethylene and/or the ethylene copolymer.