Softening point close to the decomposition temperature of the polyvinyl chloride resin. It has begun to decompose plastic pvc pipe supply 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 process indicators, namely the decomposition temperature and heat stability. The so-called decomposition temperature is the temperature when a large number of release hydrogen chloride, the so-called heat stability is at a certain temperature conditions (typically 190 ℃) is not a lot of time to release hydrogen chloride. PVC prolonged exposure to 100 ℃, unless adding a basic stabilizer, 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 flame flame-resistant plastic pvc pipe prices, with self-extinguishing, non-drip. PVC is dependent on the electrical properties of the polymer residue number, formulation type and amount of various additives. Also with the electrical properties of PVC heat circumstances: When heating PVC decomposition pvc plastic pipe products, due to the presence of chloride ions and reduce its electrical insulation, if a large amount of chloride ions can not be alkaline stabilizer (e.g. lead salts) The neutralization will result in decreased electrical insulation properties. Unlike PVC, polyethylene, polypropylene such non-polar polymer, its electrical properties with frequency and temperature-dependent, such as the dielectric constant decreases with increasing frequency. Pvc plastic pipe products, 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.