Knowledge

As a cable material, PVC, like polyethylene, should consider the electrical properties after coloring. In particular, polyvinyl chloride has poorer insulation properties than polyethylene, so the infl

Sulfide colorants (such as cadmium red, yellow, etc.) are used for coloring PVC, and hydrogen sulfide may be released due to the decomposition of colorants. Such colorants should not be mixed with lea

The measurement method is the hue change of pigmented polyethylene when heated to 180°C. Due to the metal ions contained in the pigment, the decomposition of PVC is accelerated, resulting in a hue cha

Polyvinyl chloride has poor thermal stability and light resistance. At 150 ° C, hydrogen chloride begins to decompose, and adverse reactions occur with the amount of plasticizer. In addition, the infl

PVC generally needs to be modified and granulated first. After being prepared into granules with a screw extruder, the plasticization is more sufficient and the processing is easier, especially for pr

PVC resin is a polar non-crystalline high polymer, density: 1.380 g/cm3, glass transition temperature: 87 ℃, so it has poor thermal stability and is not easy to process. It cannot be used directly. It

The polymerization device is special, mainly composed of a vertical prepolymerization kettle and a horizontal polymerization kettle with a frame agitator. The polymerization is carried out in two stag

One of the earliest industrial production methods of PVC. In emulsion polymerization, in addition to water and vinyl chloride monomers, surfactants such as sodium alkyl sulfonate are added as emulsifi

The monomer is suspended and dispersed in the water phase in the form of droplets, and the selected oil-soluble initiator is dissolved in the monomer. The polymerization reaction is carried out in the

PVC is prepared by free radical addition polymerization. The polymerization methods are mainly divided into suspension polymerization, emulsion polymerization and bulk polymerization. Suspension polym

In the first half of 2013, affected by many unfavorable factors such as overcapacity in the industry and weak downstream demand, the overall performance of the polyvinyl chloride (PVC) industry was no

Although China has the world's largest PVC production capacity, the ethylene-based PVC import volume in 2009 hit a new record due to the fall in ethylene prices. On the other hand, China's PVC market