Polyethylene resin for large-diameter winding pipe and industrial production method thereof

The invention discloses polyethylene resin for a large-diameter winding pipe and an industrial production method thereof. According to the invention, polyethylene powder with high density and narrow molecular weight distribution is produced by adopting a double-ring pipe slurry process and a chromium catalyst, and is subjected to melt extrusion granulation with a main antioxidant, an auxiliary antioxidant, stearic acid and the like to obtain the polyethylene resin. The large-diameter winding pipe made of the polyethylene resin has the advantages of light weight, convenience in connection and the like, also has good mechanical strength, stress cracking resistance, creep resistance and cold resistance, and can be widely applied to the fields of municipal underground drainage, pollution discharge, rainwater collection, road engineering drainage, ventilation and the like. 本发明公开了一种大口径缠绕管聚乙烯树脂及其工业化生产方法。采用双环管淤浆工艺及铬系催化剂生产高密度、分子量分布窄的聚乙烯粉料，将其与主抗氧剂、辅抗氧剂、硬脂酸等熔融挤出造粒，得到聚乙烯树脂。利用聚乙烯树脂制成的大口径缠绕管具有重量轻、连接方便等优点，具有良好的机械强度，及耐应力开裂性能