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. Below, China and the United States introduce you to the functional coefficient of PVC foam board.
1. Mechanical properties
PVC foam board has high hardness and mechanical properties. And it progresses 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 conflict of PVC is general, the static collision factor is 0.4-0.5, and the dynamic collision factor is 0.23.
2, electrical performance
PVC foam board is a kind of polymer with better electrical function, 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, and 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 differentiate 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.