PVC early in 1835 to the United States V. Le Niao found to yield a white solid when sunlight chloride, namely PVC. PVC was discovered in the 19th century, pvc pipe supply injection twice, once in 1835 Henri Victor Regnault injection pvc pipe prices, another is Eugen Baumann found in 1872. Two opportunities, this polymer appear in is placed in the sun too vinyl chloride beaker, to a white solid. Early 20th century, the Russian chemist Ivan Ostromislensky and Germany Griesheim-Elektron chemist Fritz Klatte Also, try PVC used for commercial purposes, but the difficulty is how to process this kind of hard, sometimes brittle polymer of. pvc identification may also be determined by measuring the material to determine whether it contains chlorine, but because the vinyl chloride copolymer, polychloroprene, polyvinylidene chloride, chlorinated polyvinyl chloride and so contains a higher proportion of chlorine, but also the color by pyridine reaction to identify. Note that before the test, the sample must be approved by ether extraction to pvc injection pipe products, test methods remove plasticizers: ether and benzene will take over after the sample was dissolved in tetrahydrofuran, the insoluble component, precipitated by the addition of methanol extraction below 75 degrees after the former dry. The dried small sample need not react with 1ml of pyridine, in a few minutes, add 2 drops of 5% methanol in presence of sodium hydroxide solution (1g of sodium hydroxide was dissolved in methanol then 20ml), immediately look colors, 5min and 1h were observed once again. Identification of different colors according to the chlorine plastic. pvc injection pipe products, sea Widex (certified), pvc injection 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.