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    • 10. 发明申请
    • BLOWNFILM GRADE SHOWING SUPERIOR STIFFNESS, TRANSPARENCY AND PROCESSING BEHAVIOUR
    • BLOWNFILM等级显示超级强度,透明度和处理行为
    • WO2011076636A1
    • 2011-06-30
    • PCT/EP2010/069788
    • 2010-12-15
    • BOREALIS AGBERNREITNER, KlausNIEDERSÜSS, KlausGAHLEITNER, Markus
    • BERNREITNER, KlausNIEDERSÜSS, KlausGAHLEITNER, Markus
    • C08J5/18
    • C08J5/18C08F10/06C08J2323/14C08L23/14C08L2205/24C08F210/06C08F210/16C08F2500/09C08F2500/11C08F2500/12C08F2500/26C08F110/06C08L23/12
    • Extrusion blown film comprising a polypropylene composition, said polypropylene composition comprises a random propylene copolymer, a high melt strength polypropylene, a polypropylene and optionally a clarifier, wherein • the random propylene copolymer comprises units derived from propylene and at least another C 2 to C 20 α-olefin, • the high melt strength polypropylene has a branching index g' of less than 1.0, the polypropylene (B) has a MFR 2 (230°C) of at least 400 g/10min, • the clarifier comprises at least one α-nucleating agent, and wherein further • the branching index g' of the random propylene copolymer and the branching index g' of the polypropylene are higher than the branching index g' of the high melt strength polypropylene, • the random propylene copolymer has lower melt flow rate MFR 2 (230°C) than the polypropylene, • the extrusion melt blown film and/or the polypropylene composition (i) fulfill(s) the equation (I) Tm -Tc 2 (230°C) of 1.0 to 5.5 g/10min.
    • 包含聚丙烯组合物的挤压吹塑薄膜,所述聚丙烯组合物包含无规丙烯共聚物,高熔体强度聚丙烯,聚丙烯和任选的澄清剂,其中无规丙烯共聚物包含衍生自丙烯和至少另一个C 2至C 20α- 烯烃,°高熔体强度聚丙烯具有小于1.0的支化指数g',聚丙烯(B)具有至少400g / 10min的MFR 2(230℃),该澄清剂包含至少一个成核 并且其中随机丙烯共聚物的支化指数g'和聚丙烯的支化指数g'还高于高熔体强度聚丙烯的支化指数g',无规丙烯共聚物具有较低的熔体流动速率 MFR2(230℃)高于聚丙烯,挤压熔融吹塑薄膜和/或聚丙烯组合物(i)满足式(I)Tm-Tc <30(I)其中Tm是熔融温度 钛白粉[℃]占挤出熔融吹塑薄膜或聚丙烯组合物的总熔融焓Hm的50%以上; Tc是挤出熔融吹塑薄膜或聚丙烯组合物的结晶温度[℃] 和/或(ii)具有1.0至5.5g / 10min的熔体流动速率MFR 2(230℃)。