Ethylene random polymer is also a kind of polypropylene, and the basic structure of its polymer chain is modified by adding different kinds of monomer molecules. Ethylene is the most commonly used monomer, which changes the physical properties of polypropylene. Compared with pp homopolymer, random polymer has improved optical properties (increased transparency and reduced haze), improved impact resistance, increased flexibility and reduced melting temperature, thus reducing thermal welding temperature; At the same time, it is basically the same as homopolymer in chemical stability, water vapor isolation performance and organ sensory performance (low odor and low taste). Used in the fields of blow molding, injection molding, film and sheet extrusion processing, as food packaging materials, medical packaging materials and daily consumer goods.
PP-R pipes are also called type III polypropylene pipes and random polypropylene pipes. They are extruded into pipes and injected into pipe fittings. It is a new plastic pipeline product developed and applied in Europe in the early 1990s. At the end of 1980s, about 5% of PP-R molecular chains were randomly homopolymerized by gas phase polymerization, which became a new generation of pipeline materials. It has high strength, good impact resistance and long-term creep performance. At the same time, the pipeline has excellent chemical corrosion resistance and is insoluble in any known solvent at room temperature, so it is more suitable for conveying chemical fluids in chemical plants and other places besides home decoration. The service life can reach 50 years, and there is no cheaper material to replace it on the market.
Wei Xing has four modern production bases in Zhejiang, Shanghai and Tianjin. The main products are PP-R pipeline system, PE pipeline system, PB, PE-RT pipeline system, PE double-wall corrugated pipe system, HDPE drainage on the same floor, etc., which are widely used in water supply, drainage, sewage, gas, heating, electric power, mines and other fields. The company has a strong provincial R&D center and testing center, and middle and senior technical elites gather, persist in innovation and actively carry out international technical exchanges and cooperation. The company is one of the main drafting units of the national standard "Polypropylene Piping System for Hot and Cold Water", edited and participated in many national and industrial standards, and many technologies filled the gaps in China and obtained more than 30 national patents. It is recognized as a high-tech enterprise in Zhejiang Province. The company took the lead in passing the ISO 9001/ISO14001quality and environment dual-system certification in the same industry. Advanced equipment, high-quality raw materials, exquisite technology, innovative research and development capabilities and refined modern management mode ensure excellent quality. Company products were awarded "China Famous Brand Products"; PP-R series pipes, PE water supply pipes, gas pipes, double-walled corrugated pipes, etc. Has passed the "national inspection exemption"; Wei Xing trademark was recognized as "China well-known trademark".