PVC resin industry is the basis of type and energy-intensive industries, subject to demand and energy prices, greater impact, but it is also a basic chemical raw materials, and is therefore also very closely associated with economic development. From the 2012 situation, the domestic PVC resin capacity is still declining, while the downstream demand growth is relatively slow, coupled with exports, increase imports, domestic PVC resin overall operating rate is not high PVC plastic pipe manufacturers, large number of idle production capacity of PVC plastic pipe, market prices remain in low levels, the price range is reduced. In addition, PVC resin futures listed some extent, an increase of PVC resin market price volatility uncertainty . Looking to the next few years, China's PVC resin industry will be in a more difficult period of consolidation, there are a variety of factors will influence the future development of PVC resin in China. Suspension polymerization of the monomer was suspended micro droplets dispersed in the aqueous phase, the choice of oil-soluble initiator is soluble in the monomer, the polymerization reaction is carried out in these droplets, the polymerization reaction heat is absorbed by the water in time, in order to ensure These droplets dispersed in water, the form of beads, suspension stabilizers need to be added, such as gelatin, polyvinyl alcohol, methyl cellulose, hydroxyethyl cellulose and the like. Initiator to use more organic peroxides and azo compounds, such as peroxydicarbonate, diisopropyl peroxydicarbonate, dicyclohexyl peroxydicarbonate, di-ethylhexyl acrylate and azobisisobutyronitrile heptanenitrile, even azobisisobutyronitrile and the like. Polymerization in a polymerization vessel is carried out with a stirrer. After the polymerization, the material flows into the recycling monomer within the monomer recovery tank or stripper. Then flows into the mixing vessel, washed and then centrifugal dewatering, drying derived resin products. Vinyl chloride monomer should be as pumping from the resin. As food packaging of PVC, free monomer content should be controlled below 1ppm. To ensure that the provisions of the polymerization to obtain resin molecular weight and molecular weight distribution and to prevent implosion PVC plastic pipe fittings, must control the temperature and pressure of the polymerization process is good. Size and size distribution of the resin by stirring for selection and control the speed and the amount of suspension stabilizers. Mass of the resin to the particle size and particle size distribution, molecular weight and molecular weight distribution, apparent density, porosity, fish-eye, thermal stability, color, free flowing powder and impurity content and other properties characterized. The polymerization of polyvinyl chloride (referred to as PVC) waterproofing membrane is the main equipment should kettle, kettle body made of steel or enamel-lined stainless steel, equipped with a stirrer and a heat jacket temperature control, cold exhaust pipe or inside, reflux condenser. In order to reduce the cost of production of PVC plastic pipe processing, the volume of the reactor by a few cubic meters, more than ten cubic gradually to the large-scale development, the maximum has been reached 200m (see tank reactor). Polymerization reactor to be cleaning after repeated use. Polyvinyl alcohol and cellulose ethers as suspension stabilizer obtained PVC generally more loose, more porosity, large surface area, to absorb the plasticizer and plasticized. PVC plastic pipe prices, PVC plastic pipe fittings, 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!