... better hardness PVC Skinning/Semi-Skinning Foaming Board Extrusion Line. Compared with PVC free foaming board, PVC skining foaming board ... of free foaming board. PVC skining foaming bozrd extrusion line is composed of conical twin-screw extruder, die, vacuum ... extrusion, high foaming, smooth and wearable surface. By equipping with the printing machine, laminating machine of hot stamping machine, this ...