Irrigation pipe, due to the small drip flow, slow infiltration, mainly through the capillary diffusion of tension, is one of the most effective types of water conservation and irrigation methods. Local precise irrigation, greatly limits to improve the utilization of irrigation water pipe manufacturers, reduces weeds growing irrigation pipe manufacturers, improve soil structure irrigation pipe specifications, reducing the water pressure requirements. At the same time through a header fertilization device for precise fertilization irrigation pipe, really done low-input, high-yield. Higher molecular weights result in higher polymer viscosity, but the viscosity and temperature and shear rate used in the test concerned. Rheological measurements on the molecular weight or molecular weight materials were characterized. HDPE grade molecular weight range generally have from 40 000 to 300 000, weight average molecular weight generally corresponds to a melt index range, i.e. from 100 to 0. 029 / 10min. Generally, a higher MW (lower melt index MI) enhanced melt strength, better toughness and ESCR, but higher MW and make processing more difficult or requires a higher pressure or temperature. The molecular weight distribution (MWD): PE WD of catalysts and processes based on the use of rather different from narrow to wide. The most commonly used measure MWD index irregularity index (HI), which is equal to weight average molecular weight (MW) divided by number average molecular weight (Mn). The index range is 4-30 all HDPE grades. Narrow MWD provides low warpage during molding and high impact resistance. In the most broad MWD provides workability during extrusion. Broad MWD can also improve the melt strength and creep resistance. Xiong Wang Thai Plastic Products Factory sales irrigation pipe irrigation pipe Jinzhou _ _ provided by Xiong Xiong Wong Tai Wang Thai Plastic Products Factory. Xiong Wang Thai Plastic Products Factory (www.wangtai668.com) strong, credible, in Baoding UPVC pipe industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Taihe Wang Xiong you hand into the brilliant, for a better future!