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1. Brief:Polystyrene resin as raw materials and other raw materials and polymer, by heating mixed into the catalyst at the same time, and then extruded extrusion molding and manufacturing of hard foam plastic board. Its scientific name is adiabatic with extruded polystyrene foam plastic (XPS), XPS with perfect obturator honeycomb structure, this structure makes XPS board has a very low water imbibition (almost no water absorption), low thermal conductivity coefficient, high pressure resistance, aging resistance (normal use almost no decomposition of ageing phenomenon).2. The performance charac