PVC Pipes manufacturer Widex _ Sea (certified) _PVC Yixingguan Widex provided by Qingdao Rubber Material Co., Widex Qingdao Rubber Material Co., Ltd. (www.haihuidaxiangsu.com) is specialized in "PVC profiles, seals, ABS extrusion profiles, PVC raw material" of the enterprise, the company of "honesty, hard service" concept, for You provide the most quality products and services. Welcome to inquire! Contact: Zhao Shuang. pvc pipe identification method 1: Look at the surface finish, and whiteness. 2: Take a sample fell shaped PVC pipe, easily broke calcium product generally is, of course, you have to comply with the requirements of the price is right, then it is possible. 3: Take a sample of the side with the foot PVC pipes Pipes price, see if you can crack or split after breaking elongation. (Generally you have to try to put a good set of lines, ha ha, otherwise people can not let you step on) 4: weather terms. The most direct way is to get a high 温高光 place to put a few days to see if the rate of change of the surface, but a waste of time. Mainly to see the former three like. Affect the quality of pipe materials and equipment and pipelines. These factors in the domestic and foreign manufacturers are the same. PVC resin is a polar non-crystalline polymers, density: 1.380 g / cm, glass transition temperature: 87 ℃, and therefore poor thermal stability, difficult processing. Can not directly use PVC Pipes, must be modified mixed, add the relevant additives and fillers can be used. And because of different additives and added to the relevant type and filler fraction, which determines the material properties and the requirements of PVC prepared is not the same. We usually call it PVC formulations, strictly speaking is modified PVC formulations, but only after a modification to use PVC. This category is often classified as a polymer modified materials. Studies of polymer materials modified plastics primarily focus on high performance general-purpose, single-component materials to the multi-component composite material change (alloys, blends, composites), giving the material functions, optimization of performance and price and so on. Modified method is mainly chemical modification, filling modification, enhancement modification, blending modification and nano-composite modified. The basic principle is modified by providing material additives function or enhance certain properties. Therefore, compete with PVC formulation technology, determines a plant technology and production capacity to compete.