Polyethylene homo- or copolymer having improved wear properties

The present invention relates to a polyethylene homo- or copolymer having improved wear properties. In particular, the invention relates to an ultra-high molecular weight polyethylene having improved wear properties prepared using a heterogeneous Ziegler catalyst system. Said polyethylene homo- or copolymer is characterized in that the abrasion index of said polyethylene is related to the elongational stress according to the formula (I): in which ES is equal to elongational stress as measured according to ISO 11542-2:1998 AI is equal to abrasion index, as measured according to ISO 15527:2010 where the reference material according to ISO 15527:2010 is set to 100; Beta and 1.8; and 0.015 and lt 0.017. 本发明涉及具有改进耐磨性的聚乙烯均聚或共聚物。具体地，本发明涉及应用非均相Ziegler催化剂体系制备的具有改进耐磨性的超高分子量聚乙烯。所述聚乙烯均聚或共聚物的特征在于所述聚乙烯的磨损指数按下式与拉伸应力相关：其中：ES＝按ISO 11542-2:1998测量的拉伸应力，AI＝按ISO 15527:2010测量的磨损指数，其中参比材料按ISO 15527:2010设定为100；β