Biaxial stretching compound styrene type resin shi - to

摘要

A biaxially stretched sheet of a multilayer structure, comprising at least one layer of polystyrene and at lest two layers of a mixture of polystyrene and styrene/butadiene block copolymer resin, wherein both outside layers are formed of said mixture, the thickness of each of the outside layers is 1 to 20% of the total thickness of the sheet, and the entire sheet is biaxially stretched.