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    • 1. 发明授权
    • Process for making non-thermoplastic starch fibers
    • 制造非热塑性淀粉纤维的方法
    • US07276201B2
    • 2007-10-02
    • US10803751
    • 2004-03-18
    • Michael David JamesLarry Neil MackeyDonald Eugene EnsignSavas Aydore
    • Michael David JamesLarry Neil MackeyDonald Eugene EnsignSavas Aydore
    • D01D5/098D01D10/02D01F9/00
    • D01F9/00
    • A process for making non-thermoplastic starch fibers comprises the steps of: (a) providing a non-thermoplastic starch composition comprising from about 50% to about 75% by weight of modified starch and from about 25% to about 50% of water and having a shear viscosity within the at least one nozzle from about 1 to about 80 Pascals·second at the processing temperature and at a shear rate of 3,000 sec−1; (b) extruding the non-thermoplastic starch composition through at least one extrusion nozzle terminating with a nozzle tip, thereby forming at least one embryonic starch fiber; (c) attenuating the at least one embryonic starch fiber with an attenuating air having an average velocity at the nozzle tip greater than about 30 meters per second, to cause the fiber to form an average equivalent diameter of less than about 20 microns; (d) dewatering the at least one embryonic starch fiber to a consistency of from about 70% to about 99% by weight, thereby producing at least one non-thermoplastic starch fiber, wherein the starch fiber as a whole has no melting point.
    • 制备非热塑性淀粉纤维的方法包括以下步骤:(a)提供非热塑性淀粉组合物,其包含约50%至约75%重量的改性淀粉和约25%至约50%的水,以及 在加工温度和3000秒-1的剪切速率下,在至少一个喷嘴内具有约1至约80帕斯卡秒的剪切粘度; (b)通过终止于喷嘴尖端的至少一个挤出喷嘴挤出非热塑性淀粉组合物,从而形成至少一种胚胎淀粉纤维; (c)用具有大于约30米/秒的喷嘴尖端的平均速度的衰减空气减弱至少一种胚胎淀粉纤维,以使纤维形成小于约20微米的平均当量直径; (d)将至少一种胚胎淀粉纤维脱水至约70%至约99%重量的稠度,从而制备至少一种非热塑性淀粉纤维,其中整个淀粉纤维没有熔点。
    • 5. 发明授权
    • Vacuum apparatus having transitional area for controlling the rate of
application of vacuum in a through air drying papermaking process
    • 真空设备具有用于控制通风干燥造纸工艺中真空应用速率的过渡区域
    • US5776311A
    • 1998-07-07
    • US706917
    • 1996-09-03
    • Paul Dennis TrokhanDonald Eugene Ensign
    • Paul Dennis TrokhanDonald Eugene Ensign
    • D21F1/52D21F2/00D21F11/00D21F1/48
    • D21F2/00D21F1/52D21F11/006
    • A papermaking vacuum apparatus having a web-facing surface adapted to support a papermaking belt and comprising a head, a body and at least one vacuum slot disposed in the head and defining an aperture on the web-facing surface. The vacuum slot is in fluid communication with the web-facing surface and extends from the web-facing surface to the body which is in further fluid communication with a vacuum source. The web-facing surface comprises a leading surface and a trailing surface. The leading surface has a transitional area juxtaposed with the aperture created by the vacuum slot. This transitional area has a predetermined Z-directional spacing from the papermaking belt, which Z-spacing continuously and gradually increases in the machine direction whereby the amount of vacuum pressure applied through the vacuum slot to the paper web gradually increases as the paper web travels in the machine direction over the slot.
    • 一种造纸真空装置,具有面向卷筒纸的表面,其适于支撑造纸带并且包括头部,主体和布置在头部中的至少一个真空槽,并且在面向卷筒纸的表面上限定孔。 真空槽与面向卷筒纸的表面流体连通,并且从卷筒纸面向表面延伸到与真空源进一步流体连通的主体。 卷筒纸表面包括前表面和后表面。 前导表面具有与由真空槽产生的孔并列的过渡区域。 该过渡区域与造纸带具有预定的Z方向间隔,Z-间距在机器方向上连续且逐渐增加,从而通过真空槽向纸幅施加的真空压力随着纸幅行进而逐渐增加 机器方向在插槽上。