PVC may be ethylene, chlorine and the catalyst is made by a substitution reaction. Because of its role in fire resistant, PVC is widely used in all kinds of industries: Cable sheath, fiber jacket, shoes, handbags, bags, accessories, signs and billboards, building and decorating supplies, furniture, ornaments , rollers, pipes, toys (such as the famous Italian "Rody" jumping horse), curtain, rolling door, auxiliary medical supplies, gloves, plastic wrap certain foods, such as certain fashion. A method for emulsion polymerization of the earliest industrial production of PVC. In the emulsion polymerization, in addition to water and vinyl chloride monomer outer pvc plastic pipe manufacturers, but also added a surfactant such as an alkyl sulfonate as emulsifier, the monomer is dispersed in an aqueous phase from an emulsion, a water-soluble potassium persulfate or ammonium persulfate as the initiator, you can also use "oxidation - reduction" initiation system, a different course and suspension polymerization. There are also added polyvinyl alcohol as emulsion stabilizers, dodecanethiol as regulator, sodium bicarbonate as a buffer. Batch polymerization method, semi-continuous and continuous method of three. Latex-like polymerization product, the emulsion particle diameter of 0.05 ~ 2μm, can be applied directly or spray-dried into powder resin. Emulsion polymerization method cycle is short, easier to control, to get the high molecular weight resin, more uniform degree of polymerization, suitable for PVC paste pvc plastic pipe products, manufactured leather or impregnated products. Emulsion polymerization complex formula pvc plastic pipe fittings, high impurity content of products. Bulk polymerization polymerization system is rather special, mainly by vertical prepolymerizer and framed horizontal agitator polymerization reactor composition. Polymerization in two stages. Monomer and initiator to the polymerization vessel in the pre-prepolymer 1h, to generate the seed particles, then the conversion rate of 8% to 10%, and then flows into the second polymerization reactor, the monomer and the prepolymer supplemented with an equal volume of to continue the polymerization. Conversion rate to be 85% to 90%, the discharge of residual monomer, and then crushed and sieved to obtain the finished product. Resin particle size and particle shape is controlled by the stirring speed, reaction heat brought out by monomer reflux condenser. This production process is simple, good product quality, production costs are lower. pvc plastic pipe products _pvc plastic pipe _ sea Widex Widex provided by Qingdao Rubber Material Co., Ltd. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) strong, credible, in Qingdao, Shandong industrial products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the sea Widex and you work into the brilliant, for a better future!