pvc pipe prices heterosexual _ sea Widex (certified) _pvc heterosexual pipe provided by Qingdao Rubber Material Co., Ltd. Widex. Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is specialized in "PVC profiles, seals, ABS extruded profiles, PVC raw material" of the enterprise, the company adhering to the "honesty, hard service" concept, for You provide the highest quality products and services. Welcome to inquire! Contact: Zhao Shuang. PVC profile products experienced a period of rapid development and introduction period from the time point of view, can be defined as the mid-1980s to 1990s of the twentieth century, and around 1995 to 2002. After 2003, PVC profile industry entered a transition period. The import of products: Manufacturer common pursuit of low cost, simplified window profiles section, fill a large number of formulations of calcium carbonate, resulting in low performance, a lot of quality problems affecting the promotion of the product. Dominant heterosexual pvc pipe prices in 1995 began, a number of strong businesses, start the digestion and absorption of foreign technology essence Continental profiles, developed their own doors and windows series, becoming the plastic doors and windows, doors and promoting technological upgrading and development, but also the entire industry has been an unprecedented development and growth. Suspension polyvinyl chloride PVC resin body [palyvinyl chloride (bulk polymerization)] China has produced, Sichuan Yibin Tianyuan, 内蒙古海吉 two companies, the process of transparency and insulation products than other methods. Solution polymerization of PVC resin used for surface coating areas. At low temperature 20 ~ 30 ℃ or below 0 ℃ suspension, emulsion polymerization or bulk polymerization are called hypothermia. Low molecular weight polyvinyl chloride polymerization is high, high crystallinity, structural regularity, good glass transition temperature, high heat resistance, good solvent resistance. But difficult to process than ordinary polyvinyl chloride, impact strength slightly, used as fiber and specialty plastic products. The resulting emulsion production of polyvinyl chloride PVC Emulsion says (Emulsion poly-merixation). It is a paste resin pvc pipe heterosexual wholesale, high molecular weight, smaller particles. Emulsion PVC Model RH-xy, where R- emulsion method; H- paste resin; ene absolute viscosity of the resin solution x-; y- paste viscosity. x points 1,2,3 type, a type of absolute viscosity of 2.01-2.4mPa · s, type 2 absolute viscosity of 1.81 ~ 2.00mPa · s pvc pipe material heterosexual, 3 type absolute viscosity of 1.60 ~ 1.80mPa · s. y points Ⅰ, Ⅱ, Ⅲ No. No. Ⅰ paste viscosity of not more than 3,000mPa · s, Ⅱ No. paste viscosity of 3000 ~ 7000mPa · s, Ⅲ No. paste viscosity of 7,000 ~ 10,000mPa · s.