PVC melt temperature during processing is a very important process parameters, if this argument would lead to inappropriate material decomposition problem. Very poor flow characteristics of PVC plastic PVC pipe manufacturers, the process is very narrow range. Especially large molecular weight PVC material more difficult to process (this material is usually added to improve the flow characteristics of lubricant) plastic PVC pipe products, it is often used are small molecular weight PVC material. PVC contraction rate is very low, typically 0.2 to 0.6%. Injection molding conditions melting temperature: 185 ~ 205 ℃ mold temperature: 20 ~ 50 ℃ injection pressure: can be as large 1500bar holding pressure: can be as large as 1000bar injection speed: To avoid material degradation of plastic PVC pipe fittings, general use of considerably injection speed. PVC resin is a polymer less stable under the action of light and heat will degrade plastic PVC pipe fittings supply, the process is the release of hydrogen chloride, structural changes occur, but the extent of relatively light. At the same time when a mechanical force, oxygen, odors, HCl and some of the active metal ions accelerate decomposition. Polyvinyl chloride resin after removal of HCl, produced in the main chain conjugated double stranded, the color will change. With the increase in the number of hydrogen chloride decomposition, polyvinyl chloride resin, the original white to yellow, pink, red, brown and even black. Shandong plastic PVC pipe _ sea Widex (certified) _ plastic PVC pipe provided by Qingdao Rubber Material Co., Widex. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is Qingdao, industrial products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Widex leadership in the sea with the staff warmly welcome all inquiries negotiations to create sea Widex a better future.