公开(公告)号：US20160251504A1

公开(公告)日：2016-09-01

申请号：US15154800

申请日：2016-05-13

Applicant: Basell Polyolefine GmbH

Inventor： Joachim Berthold ,  Lutz-Gerd Heinicke ,  Gerhardus Meier

IPC: C08L23/06 ,  C08J5/18

CPC classification number: C08L23/06 ,  C08J5/18 ,  C08J2323/04 ,  C08J2323/06 ,  C08J2423/08 ,  C08L23/04 ,  C08L23/08 ,  C08L23/0807 ,  C08L23/0815 ,  C08L2203/16 ,  C08L2205/025 ,  C08L2205/03 ,  C08L2666/06

Abstract: 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 μm. The molding composition has a density at a temperature of 23° C. in the range from 0.953 to 0.960 g/cm3 and an MFR190/5 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.

Abstract translation: 本发明涉及具有特别适用于厚度在8至200μm范围内的吹塑薄膜的多峰摩尔质量分布的聚乙烯模塑组合物。 模塑组合物的密度在23℃的温度范围为0.953至0.960g / cm3，挤出后的最终产品的MFR 190/5为0.10至0.50dg / min。 该组合物包含30至60重量％的由具有第一分子量的均聚物A制成的第一乙烯聚合物部分，22至40重量％的由其它均聚物或第一共聚物B制成的第二乙烯聚合物部分 乙烯和来自具有4至8个碳原子的烯烃基团的至少一种第一共聚单体，第一共聚物B具有高于第一分子量的第二分子量和10至30重量％的第三乙烯聚合物部分 由具有高于第二分子量的第三分子量的第二共聚物C制成。 本发明的模塑组合物允许制造具有改进加工性能的薄膜而不损害机械性能。

公开(公告)号：US10174186B2

公开(公告)日：2019-01-08

申请号：US15154800

申请日：2016-05-13

Applicant: Basell Polyolefine GmbH

Inventor： Joachim Berthold ,  Lutz-Gerd Heinicke ,  Gerhardus Meier

IPC: C08L23/06 ,  C08J5/18 ,  C08L23/04 ,  C08F2/38 ,  C08L23/08

Abstract: 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 μm. The molding composition has a density at a temperature of 23° C. in the range from 0.953 to 0.960 g/cm3 and an MFR190/5 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.