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    • 1. 发明授权
    • Process for producing a monofilament having high tenacity
    • 具有高强度的单丝的制造方法
    • US4504432A
    • 1985-03-12
    • US572610
    • 1984-01-23
    • Ryosuke KameiToyoaki TanakaTakeshi SanoMasataka Kotani
    • Ryosuke KameiToyoaki TanakaTakeshi SanoMasataka Kotani
    • D01F6/46D01D5/16D01F6/04D01D5/12
    • D01D5/16D01F6/04
    • A monofilament of a thermoplastic resin having a high tenacity is produced by a process in which a monofilament is melt spun at a temperature of 220.degree. C. to 310.degree. C. from a thermoplastic resin through a nozzle having a cross-sectional area S (mm.sup.2) satisfying the following equations: ##EQU1## wherein I is a maximum cross-sectional secondary moment max (Ix, Iy) (i.e., the maximum secondary moment in the cross-sectional secondary moments with respect to the main x axis and y axis passing through the center of the gravity of the cross-section); and, then, is subjected to a multi-stage stretching under the conditions satisfying the following equations: ##EQU2## wherein i is a number of stretching stages, e is a base of natural logarithm (i.e., 2.71828), V.sub.1 is the first take-off linear velocity (m/min), V.sub.i+1 is the final take-off linear velocity (m/min) at the i-stretching stage, DR.sub.Ti is the total stretching ratio at the i-stretching stage, DR.sub.Tiw is the DR.sub.Ti from which the monofilament begins to become whitened at the i-stretching stage, T.sub.m is the melting point of the thermoplastic resin and .theta..sub.i is the temperature of the filament at the i-stretching stage.
    • 具有高强度的热塑性树脂的单丝通过一种方法制备,其中将单丝在220℃至310℃的温度下从热塑性树脂通过具有横截面积S( mm2)满足以下等式:0.503mm2 θi / = 2)其中i是拉伸阶段的数量,e是自然对数的基数(即2.71828),V1是第一个起飞线速度(m / min),Vi + 1是最终的 起始线速度(m / min)在第i个拉伸阶段,DRTi是i拉伸阶段的总拉伸比,DRTiw是在i拉伸阶段单丝开始变白的DRTi 是热塑性树脂的熔点,θi是在i拉伸阶段的长丝的温度。
    • 9. 发明申请
    • Polypropylene-base molded article and container
    • 聚丙烯基成型品和容器
    • US20070122577A1
    • 2007-05-31
    • US10572704
    • 2004-09-21
    • Toshiharu IwasakiMasataka KotaniKatsuyuki Yoshikawa
    • Toshiharu IwasakiMasataka KotaniKatsuyuki Yoshikawa
    • B32B27/32B32B27/08B32B1/02
    • C08L23/10B32B1/02C08L23/0815C08L23/16Y10T428/1352Y10T428/31913Y10T428/31938C08L2666/06
    • One of the objects of the present invention is to provide a molded article excellent in all of transparency, impact resistance, flexibility and blocking resistance. The present invention provides the polypropylene-base molded article of the present invention is a single-layer or multilayer molded article having a layer comprising a thermoplastic resin composition containing a polypropylene resin composition (A) satisfying the following requirements and an ethylene-base copolymer (B) comprising an ethylene and at least one α-olefin having 4 or more carbon atoms. The polypropylene resin composition (A) is a composition where a polypropylene component (C) and a copolymer elastomer component (D) of propylene, ethylene and/or α-olefin having from 4 to 12 carbon atoms are contained each in a specific range, the melt flow rate is in a specific range, the content of the unit originated in the propylene in the copolymer elastomer component (D) is specified, and the xylene-soluble portion Xs satisfies specific requirements.
    • 本发明的目的之一是提供透明性,耐冲击性,柔韧性和抗粘连性全部优异的成型体。 本发明提供本发明的聚丙烯基成型体是具有包含含有满足下述要求的聚丙烯树脂组合物(A)的热塑性树脂组合物的层和乙烯 - 共聚物( B)包含乙烯和至少一种具有4个或更多个碳原子的α-烯烃。 聚丙烯树脂组合物(A)是其中含有丙烯,乙烯和/或具有4至12个碳原子的α-烯烃的聚丙烯组分(C)和共聚物弹性体组分(D)各自在特定范围内的组合物, 熔体流动速率在特定范围内,规定共聚弹性体成分(D)中的丙烯中的单元含量,二甲苯可溶成分X N满足特定要求。