double screw extruder,The macromolecule paint free boards are compound material, which is a new type decorative material, no formaldehyde content, surface smooth and beauty, restraining combustion, elegance color, handle comfort, paint free, burm blocking, innoxious, prevent mildew and damp, no volatile odor, fine surface hardness, anti-impact, sound insulation, shockproof, no shrinking and crazing.
