Bulk production processes in water, no dispersant is added only under conditions of polymerization initiator, the latter does not require treatment equipment, low investment, energy efficiency and low cost. Product transparency bulk PVC resin production with high electrical insulation, easy processing of plastic PVC pipe products, equipment and processing suspension resins can be used for the processing of bulk resin. PVC body process has been greatly developed in the 1980s. However, despite theoretically reaction process to produce resin suspension and bulk polymerization can be used in the same field, in fact, plants generally use only one of them, because of the suspension and the body resin can not be mixed, even a small amount of mixing also due to electrostatic effect leading to reduced polymer powder flowability, and suspension polymerization of the resin easier to get, so most plants gave up the body resin, bulk process in recent years there has been stalled or declining state. Softening point close to the decomposition temperature of the polyvinyl chloride resin. It has begun to decompose at 140 ℃, the decomposition at 170 ℃ when more quickly. In order to ensure the normal molding process, PVC resin provides for the two most important indicators of plastic PVC pipe technology, namely the decomposition temperature and heat stability. The so-called decomposition temperature is the temperature when large amount of hydrogen chloride release plastic PVC pipe characteristics, thermal stability is the so-called under certain temperature conditions (typically 190 ℃) is not a lot of time to release hydrogen chloride. PVC at 100 ℃ for long-term exposure unless adding a basic stabilizer PVC plastic pipe manufacturers, or will decompose, if it exceeds 180 ℃ the rapid decomposition. Long-term use temperature of most PVC products should not exceed 55 ℃, but specially formulated PVC for long-term use temperature up to 90 ℃. Soft PVC products will harden at low temperatures. PVC because it contains chlorine atoms in the molecule, so it and its copolymers generally fire flame resistant, self-extinguishing, non-drip. Shandong plastic PVC pipe, plastic PVC 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!