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    • 1. 发明授权
    • Polymer blend and method for obtaining same
    • 聚合物共混物及其制备方法
    • US4673711A
    • 1987-06-16
    • US734434
    • 1985-05-16
    • Gordon V. Sharps, Jr.Tien-Kuei Su
    • Gordon V. Sharps, Jr.Tien-Kuei Su
    • B29C47/00C08L23/10C08L25/04
    • C08L23/10B29C47/0004C08L25/04B29C47/0021B29K2023/12
    • A resin composition is disclosed which comprises a blend of from about 40 to about 95 percent by weight thereof of a first polymeric component and from about 50 to about 5 percent by weight thereof of a second polymeric component, the blend being characterized by an interior region containing a disproportionately higher content of first polymeric component and an exterior region containing a disproportionately higher content of second polymeric component, the first polymeric component being selected from the group consisting of amorphous homopolymer of styrene or lower alkyl substituted styrene and amorphous copolymer of styrene and/or alkyl substituted styrene containing up to about 40 weight percent thereof of at least one other olefinic monomer copolymerized therewith and the second polymeric component being selected from the group consisting of crystalline homopolymer of propylene and crystalline copolymer of propylene containing up to about 30 weight percent thereof of at least one other olefinic monomer copolymerized therewith.
    • 公开了一种树脂组合物,其包含约40至约95重量%的第一聚合物组分和约50至约5重量%的第二聚合物组分的共混物,所述共混物的特征在于内部区域 其含有不成比例地较高含量的第一聚合物组分和含有不成比例更高含量的第二聚合物组分的外部区域,所述第一聚合物组分选自苯乙烯的无定形均聚物或低级烷基取代的苯乙烯和苯乙烯和/ 或含有至多约40重量%的至少一个与其共聚的其它烯属单体的烷基取代苯乙烯,第二聚合组分选自丙烯的结晶均聚物和含有至多约30重量%的丙烯的结晶共聚物 至少在 与其共聚的其它烯属单体。
    • 7. 发明授权
    • Single lip rotary tubular extrusion die
    • 单唇旋转管状挤出模具
    • US4784594A
    • 1988-11-15
    • US21630
    • 1987-03-03
    • Gordon V. Sharps, Jr.
    • Gordon V. Sharps, Jr.
    • B29C47/00B29C47/06B29C47/24B29C47/28
    • B29C47/28B29C47/0023B29C47/0026B29C47/009B29C47/065B29C47/24B29C47/266B29C2791/007B29C47/0057B29C47/26Y10S428/91
    • Disclosed is a single lip tubular extrusion die in which a plurality of separate melt streams passing through respective annular flow paths are fed to a common annular flow passage extending axially to and terminating at a die orifice. The annular flow passage is connected to the annular flow paths through respective groups of holes spaced annularly about the die axis. Each group of holes has its openings to the common annular flow passage spaced a different radial distance from the die axis to allow the separate melt streams to be layered in the common annular flow passage and co-extruded. One of the die lips is rotatable so that each melt stream produces a uniform layer of polymer in the extruded film while imparting a molecular orientation to the extruded film in the transverse direction (TD). An extruder-type seal may be provided adjacent a gap between a rotating and stationary part of the die to force melt attempting to penetrate the gap into the annular flow passage.
    • 公开了一种单唇形管状挤出模头,其中通过相应的环形流动路径的多个单独的熔体流被供给到轴向延伸并终止于模口的公共环形流动通道。 环形流动通道通过围绕模具轴线环形间隔的相应组的孔连接到环形流动通道。 每组孔具有与公共环形流动通道的开口,其与模具轴线间隔开不同的径向距离,以允许单独的熔体流层叠在共同的环形流动通道中并共挤出。 模唇中的一个可旋转,使得每个熔体流在挤出的膜中产生均匀的聚合物层,同时在横向(TD)上赋予挤出膜的分子取向。 可以在模具的旋转和静止部分之间的间隙附近设置挤出机型密封件,以迫使熔化物试图穿过间隙进入环形流动通道。