发明授权
US06770341B1 Polyethylene molding material and pipe produced therewith with improved mechanical properties
有权
聚乙烯成型材料及其制造的管材具有改善的机械性能
- 专利标题： Polyethylene molding material and pipe produced therewith with improved mechanical properties
- 专利标题（中）： 聚乙烯成型材料及其制造的管材具有改善的机械性能
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申请号： US10018764申请日： 2001-12-17
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公开(公告)号： US06770341B1公开(公告)日： 2004-08-03
- 发明人: Ludwig Böhm , Joachim Berthold , Johannes-Friedrich Enderle , Elke Damm , Ulrich Schulte
- 申请人： Ludwig Böhm , Joachim Berthold , Johannes-Friedrich Enderle , Elke Damm , Ulrich Schulte
- 优先权： DE19929812 19990630
- 主分类号： C08L2304
- IPC分类号： C08L2304
摘要：
A polyethylene molding material has a bimodal molecular weight distribution with an overall density of ≧0.948 g/cm3 and a melt flow index MFI190/5 of ≦0.2 dg/min. The molding material comprises from 35 to 65% by weight of low-molecular-weight ethylene hompolymer A having a viscosity number VNA in the range from 40 to 90 cm3/g, a melt flow index MFI190/2.16 A in the range from 40 to 2000 dg/min and a density dA of ≧0.965 g/cm3. Also included is from 35 to 65% by weight of high-molecular-weight ethylene copolymer B having a viscosity number VNB in the range from 500 to 2000 cm3/g, a melt flow index MFI190/5 B in the range from 0.02 to 0.2 dg/min and a density dB in the range from 0.922 to 0.944 g/cm3.
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