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    • 4. 发明申请
    • POLYETHYLENE MOLDING COMPOSITION FOR PRODUCING BLOWN FILMS HAVING IMPROVED MECHANICAL PROPERTIES AND PROCESSABILITY
    • 用于生产具有改进机械性能和加工性能的薄膜的聚乙烯模塑组合物
    • WO2006092379A1
    • 2006-09-08
    • PCT/EP2006/060224
    • 2006-02-23
    • BASELL POLYOLEFINE GMBHBERTHOLD, JoachimHEINICKE, Lutz-GerdMEIER, Gerhardus
    • BERTHOLD, JoachimHEINICKE, Lutz-GerdMEIER, Gerhardus
    • C08L23/04C08F297/08
    • C08L23/04C08L23/06C08L23/0807C08L2205/02C08L2666/06
    • 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 0.948 to 0.953 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 films having a good balance between processability and mechanical properties.
    • 本发明涉及具有多峰摩尔质量分布的聚乙烯模塑组合物,特别适用于厚度在8至200μm范围内的吹塑薄膜。 模塑组合物在23℃的温度下的密度为0.948〜0.953g / cm 3,挤出后的最终产品的MFR190 / 5为0.10〜0.50dg / min。 该组合物包含30至60重量%的第一乙烯聚合物部分,其由具有第一分子量的均聚物A,22至40重量%的由另外的均聚物或第一共聚物B制成的第二乙烯聚合物部分制成, 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备在加工性和机械性能之间具有良好平衡的膜。
    • 5. 发明申请
    • POLYETHYLENE MOLDING COMPOSITION FOR PRODUCING BLOWN FILMS HAVING IMPROVED MECHANICAL PROPERTIES
    • 用于生产具有改进的机械性能的薄膜的聚乙烯模塑组合物
    • WO2006092377A1
    • 2006-09-08
    • PCT/EP2006/060222
    • 2006-02-23
    • BASELL POLYOLEFINE GMBHBERTHOLD, JoachimHEINICKE, Lutz-gerdMEIER, Gerhardus
    • BERTHOLD, JoachimHEINICKE, Lutz-gerdMEIER, Gerhardus
    • C08J5/18C08L23/04
    • C08L23/06C08J5/18C08J2323/04C08L23/04C08L23/08C08L23/0807C08L2205/03C08L2666/06
    • 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 0.940 to 0.948 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 40 to 60% by weight of a first ethylene polymer fraction made of a homopolymer A having a first molecular weight, from 25 to 45% by weight of a second ethylene polymer fraction made of a 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 mechanical properties, in particular in terms of dart drop impact strength, at a high take-off speed without impairing the film bubble stability.
    • 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。 成型组合物的密度在23℃的温度范围为0.940〜0.948g / cm3,挤出后的最终产品的MFR190 / 5为0.10〜0.50dg / min。 组合物包含40至60重量%的由第一分子量的均聚物A制成的第一乙烯聚合物部分,25至45重量%的由乙烯的第一共聚物B制成的第二乙烯聚合物部分 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,其由 第二共聚物C的第三分子量高于第二分子量。 本发明的模塑组合物允许以高起飞速度产生具有改进的机械性能的薄膜,特别是在滴落冲击强度方面,而不损害膜泡稳定性。