Water Hose Widely used
PE pipe At present, China's municipal pipe market, plastic pipe is steadily developing, PE pipe, PP-R pipe, UPVC pipe have a place, which PE pipe strong momentum of development is the most impressive. PE pipe use a wide range of areas. Which gives the water pipe and gas pipe is its two largest application market.
PE resin: is made of monomer ethylene polymerization, due to the polymerization due to pressure, temperature and other polymerization conditions are different, can be obtained different density of resin, and thus high density polyethylene, medium density polyethylene and low density poly Ethylene In the processing of different types of PE pipe, according to its different application conditions, the choice of different resin grades, while the requirements of the extruder and mold are also different.
PE water supply pipe: water supply PE pipe is the traditional steel pipe, PVC drinking water pipe replacement products. Water pipes must withstand a certain pressure, usually to use a large molecular weight, mechanical properties of better PE resin, such as HDPE resin. LDPE resin has low tensile strength, poor pressure resistance, poor rigidity, poor dimensional stability during molding, and difficulty in connection, and is not suitable as a material for water supply pressure pipes. However, due to its higher health indicators, LDPE, especially LLDPE resin has become a common material for the production of drinking water pipes.
PE low temperature brittle point of water pipe -70 ℃, better than other pipes. In the winter field construction PVC (PVC-U) tube is easy to brittle, there is a clear special evidence, in order to improve the toughness of PP and low temperature impact resistance, ethylene and propylene monomer can be copolymerized into random copolymer Polypropylene (PP-R), which generally uses the iPP process route and method to copolymerize propylene and ethylene, to obtain a copolymer of propylene and ethylene in the main chain, PP-R Most of the ethylene content of materials in about 3%. But the improved PP-R low temperature performance is still unsatisfactory, the embrittlement point of about -15 ℃, much higher than the polyethylene pipe embrittlement point temperature -70 ℃. The author
PE water pipes are stretchable, but PE to the water pipe stretch on the PE water pipe what benefits? So here's a brief talk about the benefits of stretch.
The macromolecule polymer has the widest range of mechanical properties in all known materials because of its high molecular weight composition due to the long chain molecules and the molecular motion with significant relaxation properties. Such as high polymer material has a very high elongation, the general elongation of PE elongation of 90% to 950%, through a special production process, part of the material elongation can be above 1000%, while the general high Material elongation at break is also more than 50% to 100%. Generally, the tensile properties of the material are required to have a heat-shrinkable film and a stretch film. A good pipe, not only should have a good economy, and should have a stable and reliable interface, material impact resistance, anti-cracking, anti-aging, corrosion and a series of advantages, compared with traditional pipe, PE water supply system has the following A series of advantages:
⑴ reliable connection: polyethylene pipe system between the use of electric hot melt connection, the joint strength is higher than the pipe body strength.
⑵ low temperature impact resistance: polyethylene low temperature embrittlement temperature is very low, in the -60-60 ℃ temperature range of safe use. Winter construction, due to good impact resistance of the material, no pipe embrittlement.
⑶ good resistance to stress cracking: PE water pipes with low gap sensitivity, high shear strength and excellent scratch resistance, resistance to environmental stress cracking performance is also very prominent.
⑷ good chemical resistance: PE water pipe can withstand a variety of chemical media corrosion, the existence of chemical substances in the soil will not cause any degradation of the pipeline. Polyethylene is an electrical insulator and therefore does not degrade, rust or electrochemical corrosion;
⑸ flexible: PE flexible water pipe makes it easy to bend, the project can change the direction of the pipeline to bypass the obstacles, in many cases, the flexibility of the pipe can reduce the amount of pipe and reduce the installation costs.