pvc plastic pipe manufacturers, sea Widex (certified), pvc plastic pipe fittings provided by Qingdao Rubber Material Co., Widex. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is specialized in "PVC profiles, seals, ABS extrusion profiles, PVC raw material" of the enterprise, the company of "honesty, hard service" concept, for You provide the most quality products and services. Welcome to inquire! Contact: Zhao Shuang. Advantages pipe has good tensile, compressive strength: but its flexible than other plastic pipe. 2. The fluid resistance: PVC-U pipe wall is very smooth, fluid resistance is small, its roughness coefficient of only 0.009 pvc plastic pipe manufacturer, its water capacity than an equivalent diameter cast iron pipe increased by 20% over the concrete pipes increased by 40%. 3. corrosion resistance, excellent chemical resistance: PVC-U pipe has excellent resistance to acid, alkali pvc plastic pipe, corrosion-resistant, unaffected by moisture and soil pH of water, without any preservative treatment pipeline laying. 4. Good water tightness: Install PVC-U pipes, regardless of the use of an adhesive or rubber ring connection, have good water tightness. 5. Anti-gnawing: PVC-U pipe is not a nutrient source, and therefore will not be subject to rodent attack. According to the test proved that the US National Sanitation Foundation conducted in Michigan, rats gnawing not PVC-U pipes. 6, performance testing: Curing time shrinkage splitting tensile strength properties of the thermal stability of the peel strength of the storage period applicable to hazardous materials release hair. Suspension polymerization of the monomer was suspended micro droplets dispersed in the aqueous phase pvc plastic pipe products, the choice of oil-soluble initiator is soluble in the monomer, the polymerization reaction is carried out in these droplets, the polymerization reaction heat in a timely manner by water absorption, in order to ensure that 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. For food packaging PVC pvc plastic pipe price, 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 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 production costs, 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.