PVC foam board is a kind of sheet with waterproof, flame retardant, acid and alkali resistant, anti-mite, light weight, heat preservation, sound insulation and shock absorption characteristics. It is widely used in exterior wall decoration and various public buildings. Interpret the coefficient of performance of PVC foam board.

1, mechanical properties

PVC foam board has high hardness and mechanical properties. And it increases with the increase of molecular weight, but decreases with the increase of temperature. The mechanical properties of rigid PVC are good, and its elastic modulus can reach 1500-3000MPa. The soft PVC has an elasticity of 1.5-15 MPa. However, the elongation at break is as high as 200%-450%. The friction of PVC is generally, the static friction factor is 0.4-0.5, and the dynamic friction factor is 0.23.

2, electrical performance

PVC foam board is a kind of polymer with better electrical properties, but its electrical insulation is not as good as PP and PE due to its high polarity. Dielectric constant, dielectric loss tangent and volume resistivity are large, corona resistance is not good, generally suitable for medium and low voltage and low frequency insulation materials.

3, thermal performance

The heat-resistant stability of the PVC foamed board is very poor, and it starts to decompose at 140 ° C, and the melting temperature is 160 ° C. PVC has a small coefficient of linear expansion, is flame retardant, and has an oxidation index of up to 45 or more.