... and environmental protection. Plastic board production lineOther purposed of PVC expansion boards: template, fitness equipment, breeding materials, dampproof ... art design materials, light clapboard Physical performance index of PVC free style expansion boards: item, unit, result, surface ... , result, elongation at break, % 15-20, Shore Hardness, D type, 45-50 water absorption, % ≥1.5, Vicat softening ...