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    High efficiency gear pump for pumping highly viscous fluids
    1.
    发明授权
    High efficiency gear pump for pumping highly viscous fluids 有权
    高效齿轮泵用于泵送高粘度流体

    公开(公告)号：US06210139B1

    公开(公告)日：2001-04-03

    申请号：US09398181

    申请日：1999-09-17

    申请人： Ravi Ramanathan ,  Robert E. Wrisley ,  Thomas J. Parsons ,  Kun S. Hyun

    发明人： Ravi Ramanathan ,  Robert E. Wrisley ,  Thomas J. Parsons ,  Kun S. Hyun

    IPC分类号： F04C216

    CPC分类号： F04C13/002 ,  F04C2/086

    摘要： A gear pump exhibiting improved efficiency over a broader range of fluid viscosity and pump speed includes a compression zone defined between each of a pair of pump gears and internal walls of a gear chamber, wherein the compression zones have a non-uniform thickness along a longitudinal direction of the gears. The geometry of the compression zones provides a mechanism whereby the drag of the viscous fluid which is induced by the rotation of the pump gears carries the viscous fluid through a progressively narrower gap in the direction of rotation ending in a final smooth pinch-off at the start of the seal zone. The geometry of the compression zone maximizes the drag and pressurization of the viscous fluid being pumped into the teeth of the gears, thereby assisting in the complete filling of the teeth. The result is improved fill efficiency over a broader range of pump speeds and over a broader range of fluid viscosity.

    摘要翻译： 在更宽的流体粘度和泵速范围内显示出提高的效率的齿轮泵包括在一对泵齿轮和齿轮室的内壁之间限定的压缩区域，其中压缩区沿纵向具有不均匀的厚度 齿轮方向。 压缩区的几何形状提供了一种机构，由此由泵齿轮的旋转引起的粘性流体的阻力将粘性流体沿着旋转方向上的逐渐变窄的间隙运送，从而以最终平滑夹紧 开始密封区。 压缩区域的几何形状使得被泵送到齿轮齿中的粘性流体的阻力和加压最大化，从而有助于完全填充牙齿。 结果是在更宽的泵速范围内和在更宽的流体粘度范围内提高了填充效率。

    Extrusion of vinylidene chloride copolymers under inert atmosphere
    3.
    发明授权
    Extrusion of vinylidene chloride copolymers under inert atmosphere 失效
    在惰性气氛下挤出偏二氯乙烯共聚物

    公开(公告)号：US5045259A

    公开(公告)日：1991-09-03

    申请号：US493100

    申请日：1990-03-14

    申请人： Jack A. Berdasco ,  Stephen R. Betso ,  Kun S. Hyun ,  Bobby A. Howell ,  Bernard C. Obi-Ahuba

    发明人： Jack A. Berdasco ,  Stephen R. Betso ,  Kun S. Hyun ,  Bobby A. Howell ,  Bernard C. Obi-Ahuba

    IPC分类号： B29C47/00 ,  B29C47/76

    CPC分类号： B29C47/76 ,  B29C47/0071 ,  B29C47/802 ,  B29C47/827 ,  B29C47/862 ,  B29C47/0021

    摘要： The present invention is a process for forming an extruded article containing a copolymer of vinylidene chloride and at least one other ethylenically-unsaturated comonomer, said process comprising the step of extruding the copolymer in the presence of (1) at least one gas which is inert with respect to the copolymer and does not plasticize the copolymer; and (2) essentially no gases which are not inert with respect to the copolymer. Vinylidene chloride copolymers extruded according to the process of the present invention have lower metal adhesion and less tendency to contain specks of carbon than do vinylidene chloride copolymer copolymers extruded under an air atmosphere.

    摘要翻译： 本发明是一种形成含有偏二氯乙烯与至少一种其它烯属不饱和共聚单体的共聚物的挤压制品的方法，所述方法包括在（1）至少一种惰性气体的存在下挤出共聚物的步骤 并且不使共聚物增塑; 和（2）基本上没有相对于共聚物不是惰性的气体。 根据本发明的方法挤出的偏二氯乙烯共聚物在空气气氛下挤出的偏二氯乙烯共聚物共聚物具有较低的金属粘附性和较少的含有碳斑的趋势。

    Extruder screw
    6.
    发明授权
    Extruder screw 失效
    挤出机螺丝

    公开(公告)号：US6017145A

    公开(公告)日：2000-01-25

    申请号：US366526

    申请日：1994-12-30

    申请人： Steven R. Jenkins ,  Kun S. Hyun

    发明人： Steven R. Jenkins ,  Kun S. Hyun

    IPC分类号： B29C47/38 ,  B29C47/60 ,  A21C1/06

    CPC分类号： B29C47/6081 ,  B29C47/60 ,  B29C47/6018 ,  B29C47/625 ,  B29C47/0021

    摘要： An extruder screw for use in a barrel of an extruder for forwarding thermoplastic polymer from a first end to a second end of the extruder. The extruder comprises a transition section and at least one flight extending substantially along the length of the screw. A dam is positioned at the point where the rapid melting of the solids starts to slow down and the rate of solid bed width decrease approaches zero. The dam provides the screw with a high output of extrudate and close control of the residence time of polymer particles as they are transported through the screw, resulting in an extrudate which is uniformly melted and which is substantially free of degradation products and/or entrapped air.

    摘要翻译： 一种挤出机螺杆，用于挤出机筒中，用于将热塑性聚合物从挤出机的第一端转移到第二端。 挤出机包括过渡段和基本上沿螺杆长度延伸的至少一个螺旋。 大坝位于固体快速熔化开始减速的地步，固体床宽度的降低速率接近零点。 大坝为螺杆提供高产量的挤出物，并且密封控制聚合物颗粒在通过螺杆输送时的停留时间，导致挤出物均匀熔化，基本上不含降解产物和/或夹带空气 。

    Extrudable polymeric composition
    7.
    发明授权
    Extrudable polymeric composition 失效
    可挤压聚合物组合物

    公开(公告)号：US5115029A

    公开(公告)日：1992-05-19

    申请号：US484748

    申请日：1990-02-26

    申请人： Donald E. Kirkpatrick ,  James A. Stevenson ,  Kun S. Hyun

    发明人： Donald E. Kirkpatrick ,  James A. Stevenson ,  Kun S. Hyun

    IPC分类号： C08L23/02 ,  C08L27/08

    CPC分类号： C08L27/08 ,  C08L23/02

    摘要： In one embodiment, the present invention is a polymeric composition, in pellet form, which comprises a vinyldene chloride interpolymer, and a friction reducing polymer (FRP) in an amount of from about 0.1 to about 40 weight percent, said weight percent being based on the total weight of the polymeric composition. The FRP is selected to selected to lower the frictional coefficient and the mechanical energy to extrude of the polymeric composition. In another embodiment, the present invention is a polymeric composition, in either power or pellet form, possessing improved extrudability, composition comprises a vinylidene chloride interpolymer in an amount of from about 55 to about 99.85 weight percent, a FRP in an amount from about 0.1 to about 40 weight percent, and a salt of an acid in an amount of between about 0.05 and about 5 weight percent, said weight percents being based on the total weight of the polymeric composition.

    摘要翻译： 在一个实施方案中，本发明是颗粒形式的聚合物组合物，其包含氯乙烯聚合物聚合物和约0.1至约40重量％的摩擦降低聚合物（FRP），所述重量百分比基于 聚合物组合物的总重量。 选择FRP以降低摩擦系数和挤出聚合物组合物的机械能。 在另一个实施方案中，本发明是以功率或丸状形式的聚合物组合物，其具有改进的可挤出性，组合物包含量为约55至约99.85重量％的偏二氯乙烯互聚物，约0.1重量％的FRP 至约40重量％，以及约0.05至约5重量％之间的酸的盐，所述重量百分比基于聚合物组合物的总重量。

    Vinylidene chloride interpolymer possessing improved extrudability
    9.
    发明授权
    Vinylidene chloride interpolymer possessing improved extrudability 失效
    偏二氯乙烯互聚物具有改进的挤出性能

    公开(公告)号：US4692508A

    公开(公告)日：1987-09-08

    申请号：US811214

    申请日：1985-12-20

    申请人： Mark J. Hall ,  Kun S. Hyun

    发明人： Mark J. Hall ,  Kun S. Hyun

    IPC分类号： C08J3/00 ,  C08J3/12 ,  C08F6/00

    CPC分类号： C08J3/12 ,  C08J2327/08

    摘要： A process for improving the extrudability of a vinylidene chloride interpolymer pellet. A vinylidene chloride interpolymer pellet displaying a first endotherm, as determined by differential scanning calorimetry according to American Society of Testing and Materials Test Method D-3417, below 75.degree. Celsius is exposed to a temperature above about 55.degree. Celsius for a length of time sufficient to raise said first endotherm to 75.degree. Celsius or above. Pellets treated in such a manner possess improved extrudability.

    摘要翻译： 一种改善偏二氯乙烯互聚物颗粒的挤出性能的方法。 根据美国测试和材料测试方法D-3417测定的低于75℃的通过差示扫描量热法测定的偏二氯乙烯互聚物颗粒暴露于高于约55℃的温度下足够长的时间 将第一次吸热提高至75摄氏度或以上。 以这种方式处理的颗粒具有改进的挤出性。