发明名称 |
POLYETHYLENE MOLDING COMPOSITION FOR PRODUCING BLOWN FILMS HAVING IMPROVED PROCESSABILITY |
摘要 |
The invention relates to a polyethylene molding composition having a multimodal molar mass distribution particularly suitable for blow molding films having a thickness in the range from 8 to 200 mum. The molding composition has a density at a temperature of 23° C. in the range from 0.953 to 0.960 g/cm<SUP>3 </SUP>and an MFR<SUB>190/5 </SUB>of the final product after extrusion in the range from 0.10 to 0.50 dg/min. The composition comprises from 30 to 60% by weight of a first ethylene polymer fraction made of a homopolymer A having a first molecular weight, from 22 to 40% by weight of a second ethylene polymer fraction made of a further homopolymer or first copolymer B of ethylene and at least one first comonomer from the group of olefins having from 4 to 8 carbon atoms, the first copolymer B having a second molecular weight higher than the first molecular weight, and from 10 to 30% by weight of a third ethylene polymer fraction made of a second copolymer C having a third molecular weight higher than the second molecular weight. The molding composition of the invention allows to produce thin films having improved processability without impairing the mechanical properties. |
申请公布号 |
EP1853651(A1) |
申请公布日期 |
2007.11.14 |
申请号 |
EP20060743201 |
申请日期 |
2006.02.23 |
申请人 |
BASELL POLYOLEFINE GMBH |
发明人 |
BERTHOLD, JOACHIM;HEINICKE, LUTZ-GERD;MEIER, GERHARDUS |
分类号 |
C08J5/18;C08L23/04 |
主分类号 |
C08J5/18 |
代理机构 |
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代理人 |
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地址 |
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