PVC can be divided into soft PVC and rigid PVC. Hard PVC market which accounts for about two-thirds of soft PVC 1/3. Soft PVC are generally used for surface floors, ceilings and leather, but because of soft PVC containing plasticizer (which is soft PVC and rigid PVC difference), physical performance is poor (as water pipes need to withstand a certain pressure, soft PVC not suitable for use), so its use has been limited. Hard PVC plasticizer-free, so easy to shape, good physical properties, and therefore has great development and application value. PVC material in the production process, it is bound to add some additives, such as stabilizers, plasticizers, and so, if all the use of environmentally friendly additive agent pvc pipe, PVC pipe that is also non-toxic and tasteless green products. The first half of 2013, subject to industry overcapacity, the impact of many unfavorable factors such as weak demand downstream, polyvinyl chloride (PVC) industry overall efficiency of the poor performance of the enterprise more difficult situation. However, eye-catching performance of PVC trade market, a number of data recovery significantly over last year adjustment. Insiders pointed out, however, as the US PVC plant operating rate increase, China is expected to PVC foreign trade will show a resumption of growth in imports, exports steady shrinking of the situation. According to the China Chlor-Alkali Industry Association statistics, as of the end of June 2013, the domestic PVC (vague resin) capacity of 23.92 million tons / year. PVC production capacity in the first half of this year which was 860,000 tons / year, quit 350,000 tons / year, a net increase of 510,000 tons / year, all exit capacity for calcium carbide production plant. Overall industry capacity expansion has been slowing down the speed of pvc pipe processing, but a steady increase productivity trend continues. Suspension polyvinyl chloride PVC resin body [palyvinyl chloride (bulk polymerization)] China has production, Sichuan Yibin Tianyuan, 内蒙古海吉 two companies, the method of product transparency and insulation than other methods. Solution polymerization of PVC resin used for surface coating on. At low temperature 20 ~ 30 ℃ or below 0 ℃ suspension, emulsion polymerization or bulk polymerization, both said low temperature. High molecular weight low temperature polymerization of PVC, high crystallinity, structural regularity is good, high glass transition temperature, heat resistance, solvent resistance is good. But difficult to process than ordinary PVC, lower impact strength, used for fiber and specialty plastics. The resulting emulsion PVC production called Emulsion PVC (Emulsion poly-merixation). It is a paste resin, high molecular weight, smaller particles. Emulsion PVC Model RH-xy, where R- emulsion method; H- paste resin; x- absolute viscosity resin ene solution; 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, 3 type absolute viscosity of 1.60 ~ 1.80mPa · s. y points Ⅰ, Ⅱ, Ⅲ number, number Ⅰ paste viscosity of not more than 3,000mPa · s pvc pipe manufacturers, Ⅱ No. paste viscosity of 3000 ~ 7000mPa · s pvc pipe, Ⅲ number paste viscosity of 7,000 ~ 10,000mPa · s. Acting pvc pipe, sea Widex (certified), 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.