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  • What is the diffrence of Carbide based and ethylene based PVC resin?

    1. Different of raw materials

    Carbide based PVC Resin is produced by acetylene of carbide and hydrogen chloride plus direct synthesis of

    vinyl chloride (VCM), ethylene based PVC resin is obtained by ethylene chlorination

    2. Diffrent molecular mass and molecular mass distribution

    The molecular mass of Carbide based PVC resin is lower than ethylene based PVC resin, and carbide basd

    PVC resin molecular mass distribution is wider than ethylene process PVC resin. The molecular mass distribution

     is narrow, can get better processing properties of PVC resin, carbide based PVC have wide molecular weight

    distribution will significantly reduce the thermal stability, heat distortion temperature, electrical insulation,

    mechanical strength and aging resistance; also can make PVC resin not easily plasticizing uniform in the

    usual processing condition, the existence of internal products serious quality problemsserious internal quality problems.

    3.VCM content is different

    Carbide based PVC have high content impurities such as moisture, acetylene and 1, 1- di chloroethane ,so lead to

     reduce the thermal stability, whiteness ,stenth ,aging resistance of PVC resin, and further affect the quality of PVC products.

    4. The content impurities is different

    Ethylene based PVC more purity than Carbide based PVC resin

    So compare with two type PVC resin Ethylene based PVC resin quliaty more better than carbide based PVC resin

    ethlylene based less use lubricants and impact modifier

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