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    • 1. 发明授权
    • Poly(butylene terephthalate) copolyester and a process for preparing it
    • 聚(对苯二甲酸丁二醇酯)共聚酯及其制备方法
    • US5162153A
    • 1992-11-10
    • US878086
    • 1992-05-04
    • A. Wayne CookeBarrie L. Davies
    • A. Wayne CookeBarrie L. Davies
    • C08G63/16C08G63/692C08G63/87
    • C08G63/16C08G63/6926C08G63/87Y10T428/2929Y10T428/2931
    • Poly(butylene terephthalate) copolyester advantageous of use as sheath materials in bicomponent fibers are prepared by a process for preparing a high-molecular weight, linear copolyester by condensing 40-85 molar percent of terephthalic acid optionally in the form of a dialkyl ester, half of which component can optionally be replaced by another dicarboxylic acid also optionally in the dialkyl ester form, and 60-15 molar percent of a blend of dimethyl adipate, dimethyl glutarate and dimethyl succinate with an alkanediol of 2-6 carbon atoms in its carbon chain, at an elevated temperature in the presence of a conventional catalyst, in a first condensation stage which is an interesterification or esterification stage and a second condensation stage which is polycondensation stage, whereby a copolyester melt is produce. The process comprises, before or during the first condensation stage, adding 0.005-0.1 molar percent, based on the total acid component, of a C.sub.6 -aryl or C.sub.7 -alkaryl ester of phosphorous acid or of phosphoric acid to the reaction mixture.
    • 通过将40-85摩尔%的对苯二甲酸任选以二烷基酯的形式缩合制备高分子量线性共聚酯的方法制备有益于双组分纤维中护套材料的聚对苯二甲酸丁二醇酯共聚酯 其组分可以任选地被另外的二羧酸替代,也可任选地是二烷基酯形式,60-15摩尔%的己二酸二甲酯,戊二酸二甲酯和琥珀酸二甲酯与其碳链中具有2-6个碳原子的链烷二醇的共混物 在常规催化剂存在下在升高的温度下进行,在作为酯交换反应阶段的第一缩合步骤和缩聚阶段的第二冷凝阶段,从而产生共聚酯熔体。 该方法包括在第一缩合阶段之前或期间,将基于总酸成分的0.005-0.1摩尔%的亚磷酸或磷酸的C6芳基或C7-烷芳基酯加入到反应混合物中。
    • 2. 发明授权
    • Method of spinning bicomponent filaments
    • 双组分纺丝方法
    • US5505889A
    • 1996-04-09
    • US91704
    • 1993-07-14
    • Barrie L. Davies
    • Barrie L. Davies
    • D01D5/34D01F8/04
    • D01D5/34Y10S264/26
    • A method of melt spinning sheath/core bicomponent fibers including the steps of passing multiple streams of pressurized molten core polymer from distributor flow passages into multiple parallel spinneret flow passages in respective axial or coaxial alignment with said multiple distributor flow passages. In pressured molten sheath polymer is passed through channels positioned in the top surface of the spinneret and surrounding the inlets of the spinneret flow passages. The sheath polymer is directed to flow from the channels into each of the spinneret flow passages and each of the polymer streams at a controlled pressure drop.
    • 一种熔融纺丝鞘/芯双组分纤维的方法,包括以下步骤:将多个加压的熔融核心聚合物流从分配器流动通道传送到与所述多个分配器流动通道分别轴向或同轴对准的多个平行的喷丝板流动通道中。 在加压的熔融鞘中,聚合物通过定位在喷丝头顶表面中的通道并围绕喷丝头流道的入口。 护套聚合物被引导以在受控的压降下从通道流入每个喷丝板流动通道和每个聚合物流。
    • 3. 发明授权
    • Method and apparatus for spinning bicomponent filaments and products
produced therefrom
    • 用于纺丝双组分长丝的方法和设备及由其制备的产品
    • US5256050A
    • 1993-10-26
    • US895412
    • 1992-06-05
    • Barrie L. Davies
    • Barrie L. Davies
    • D01D5/34B29C47/00D01D5/00
    • D01D5/34Y10S264/26
    • An apparatus for spinning bicomponent sheath/core filaments having a distributor plate and spinnerette and a shim positioned between the distributor plate and spinnerette to effect a controlled pressure drop of the sheath polymer material. In particular, the distributor plate and spinnerette each have a plurality of spaced core polymer flow passages and sheath polymer passages wherein the respective core polymer flow passages are axially aligned and the respective sheath polymer flow passages are aligned. The shim is positioned between the spinnerette and distributor plate to control the sheath polymer flow from the outlet of the distributor sheath polymer flow passages to the inlet of each spinnerette core polymer flow passage separately. Producing sheath/core bicomponent fibers using this apparatus results in fibers having concentric sheath/core configurations and increased throughput.
    • 用于纺丝具有分布板和纺丝板的双组分鞘/芯丝的装置和位于分布板和纺丝板之间的垫片,以实现鞘聚合物材料的受控压降。 特别地,分布板和喷丝板各自具有多个间隔开的芯聚合物流动通道和鞘聚合物通道,其中相应的芯聚合物流动通道被轴向对准并且相应的护套聚合物流动通道对齐。 垫片位于喷丝板和分配器板之间,以分别控制从分布器护套聚合物流动通道的出口到每个纺丝板芯聚合物流动通道的入口的护套聚合物流。 使用该装置生产护套/芯双组分纤维导致具有同心皮/芯构型和增加的生产量的纤维。