... it down, homogenize it,let it go through a die,cool it down and shape it, it will become polystyrene plate of ... ,shock-absorption,etc),KD plate,decorative plates,car roof,construction and decorative materials.It is the best choice for you ! ... first-stage extrudermelt it with foaming agentscreen it through a screen changercool and homogenize after it goes through the second-stage extruderdiecooling ...