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 supply pvc Pipes, washing 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. In order to secure a predetermined time of polymerization and the molecular weight and molecular weight distribution of the resin to prevent implosion, good temperature and pressure must be controlled polymerization process. 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 reactor is the main equipment should be profiled injection pvc pipe, made of steel, stainless steel or enamel-lined kettle body is made of heat jacket equipped with a stirrer and temperature control, or within cold pipes, a reflux condenser. In order to reduce production costs, the volume of the reactor by a few cubic meters, more than a dozen large-scale development gradually cubic Pipes pvc manufacturers, the maximum has been reached 200m (see tank reactor). Polymerization reactor to be cleaning after repeated use. Polyvinyl alcohol and cellulose ethers such as suspension stabilizer for PVC obtained generally more loose, more pores, large surface area, pvc Pipes, easy to absorb plasticizers and plastics. PVC resin is a polar non-crystalline polymers, density: 1.380 g / cm, glass transition temperature: 87 ℃, and therefore poor thermal stability, difficult processing. Can not be used directly, must be modified mixed, add the relevant additives and fillers can be used. And because of different additives and added to the relevant type and filler fraction, which determines the material properties and the requirements of PVC prepared is not the same. We usually call it PVC formulations, strictly speaking is modified PVC formulations, but only after a modification to use PVC. This category is often classified as a polymer modified materials. Studies of polymer materials modified plastics primarily focus on high performance general-purpose, single-component materials to the multi-component composite material change (alloys, blends, composites), giving the material functions, optimization of performance and price and so on. Modified method is mainly chemical modification, filling modification, enhancement modification, blending modification and nano-composite modified. The basic principle is modified by providing material additives function or enhance certain properties. Therefore, compete with PVC formulation technology, determines a plant technology and production capacity to compete. Qingdao Pipes pvc | pvc Pipes | 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!