Industrial polyvinyl chloride resin mainly amorphous structure, but it also contains some crystal regions (about 5%), no sharp melting point so polyvinyl chloride, is about 80 ℃ begins to soften, heat distortion temperature (1.82MPa under load) for 70-71 ℃, 150 ℃ under pressure begins to flow, and began a slow release hydrogen chloride, resulting in PVC color (from yellow to red, brown, or even black). Industrial PVC weight average molecular weight in the range of 4.8-4.8 million and a corresponding number average molecular weight of 2-1.95 million. The vast majority of industrial resin weight average molecular mass of 10-20 million and the number average molecular weight in the 4.55-6.4 million. Rigid PVC (unplasticized) has good mechanical strength, weather resistance and flame resistance PVC pipe prices, can be used alone as structural materials used in chemical manufacturing pipes, sheet metal and plastic injection products. Rigid PVC can be used to enhance the material. pvc Features 1. amorphous material, moisture absorption, poor mobility, in order to improve mobility, prevent air bubbles, should advance to dry. 2. easy to decompose, especially at elevated temperatures in contact with steel, copper easier decomposition (decomposition temperature of 200 degrees). Forming small temperature range, the material temperature must be strictly controlled. 3. Use the screw injection machine and when straight nozzle PVC pipe, large aperture should prevent stagnation dead material. 4. Die casting system should be thick, the gate should be large cross-section of PVC pipe, the mold should be cooled, the mold temperature 30-60 degrees, the material temperature 160-190. PVC pipe prices, PVC 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!