POLYSTYRENE BASED MULTILAYER STRUCTURES AND PACKAGE USING THE SAME

摘要

PURPOSE: A polystyrene based multilayer structured material and a package using the same are provided to have a good oil resistance, heat sealability and reusability. CONSTITUTION: The multilayer structure(10) comprises a surface layer(1) of a polyolefin based resin; an intermediate layer(2); and a substrate layer(3) of a polystyrene based resin. The intermediate layer comprises 25 to 75 wt.% of a polystyrene based resin, 75 to 25 wt.% of a polyolefin based resin and 1 to 20 parts by weight of a compatibilizer composed of a block copolymer based on the 100 parts by total weight of the polystyrene based resin and the polyolefin based resin. The block copolymer is a block copolymer of an aromatic vinyl and a conjugated diene.