The thin section of PVC foam board is based on strength. The PVC resin is a white or light yellow powder with a relative density of 1.35-1.45. The degree of softness and hardness of the product can be adjusted by adding plasticizers. Mechanical Properties PVC has higher hardness and mechanical properties. And with the increase of molecular weight, but with the temperature decreases. The rigid PVC has good mechanical properties and its elastic modulus can reach 1500-3000 MPa. The flexibility of soft PVC is 1.5-15 MPa. However, the elongation at break is as high as 200%-450%. The friction of PVC is general, the static friction factor is 0.4-0.5, and the dynamic friction factor is 0.23.