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    • 3. 发明授权
    • Continuous filter
    • 连续过滤器
    • US5320753A
    • 1994-06-14
    • US61877
    • 1993-05-17
    • Peter T. Keillor, IIIWilliam A. Kirksey
    • Peter T. Keillor, IIIWilliam A. Kirksey
    • B01D33/04B29C47/68B01D33/044
    • B29C47/685B01D33/04B29C47/0014B29C47/0021B29C47/003
    • Filtration process and filters for use with materials such as, but not limited to, melts, utilizing a band of filter medium sealed in the filter rollers to seal the material from the outside. In one embodiment, the seal rollers reduce to a minimum the leakage of melt to the outside and make it possible to advance the filter medium through the filter continuously. In various embodiments, the filter medium can be advanced either by the takeup spool or by driving the seal rollers and the rate of movement of the filter medium through the filter can be controlled to maintain a constant pressure drop across the filter. Two component wear-resistant seals are also provided. Maintaining constant conditions through continuous advancement of the filter medium during filtration yields higher product quality and dimensional stability.
    • 过滤工艺和过滤器用于材料,例如但不限于熔化,利用密封在过滤辊中的过滤介质带将材料从外部密封。 在一个实施例中,密封辊将熔体的泄漏减少到外部,并且使得可以连续地使过滤介质前进过滤器。 在各种实施例中,过滤介质可以通过卷取阀芯或通过驱动密封辊进行,并且可以控制过滤介质通过过滤器的移动速率以保持过滤器上的恒定的压降。 还提供双组分耐磨密封件。 通过在过滤过程中不断推进过滤介质来保持恒定条件,可以获得更高的产品质量和尺寸稳定性。
    • 4. 发明授权
    • Method for determining the residence time distribution of a polymer
extruder
    • 确定聚合物挤出机的停留时间分布的方法
    • US5062713A
    • 1991-11-05
    • US608066
    • 1990-11-01
    • Stuart FarquharsonPeter T. Keillor, III
    • Stuart FarquharsonPeter T. Keillor, III
    • B29C47/92G01N21/31G01N21/85
    • B29C47/92G01N21/85B29C2947/92057B29C2947/92409B29C2947/92485B29C47/0014B29C47/0026G01N2021/1746G01N2021/3137G01N21/314
    • A method for the on-line determination of the residence time distribution of a polymer extruder by injecting a quantity of dye, such as Mobay Red 5B, into the feed throat of the extruder and then photometrically monitoring the polymer flowing from the extruder for the dye. The advance of the present invention is to direct a single beam of polychromatic light through the polymer flowing from the extruder, e.g., by using a quartz-halogen light source and an optical fiber, and then to split this single beam of light that has passed through the polymer into two beams, e.g., by the use of a bifurcated optical fiber, each of which resulting beams are then passed through a separate filter to a separate photodetector. The wavelength of maximum transmission of one of the filters is selected to be near the wavelength of maximum light absorption of the dye so that the signal from the photodetector associated with this filter is a function of the concentration of the dye in the polymer flowing from the extruder. The wavelength of maximum transmission of the other filter is selected to be near the wavelength of minimum light adsorption of the dye and the polymer so that the signal from the photodetector associated with this filter is a function of the background light absorption of the polymer flowing from the extruder. The noise level of the dye concentration signal can be a problem due to bubbles and inclusions in the polymer flowing from the extruder and this noise level is substantially reduced by correcting the dye concentration signal with the background signal.
    • 通过将一定量的染料(例如Mobay Red 5B)注射到挤出机的进料喉中,然后对从染料的挤出机流出的聚合物进行光度监测来在线测定聚合物挤出机的停留时间分布的方法 。 本发明的进步是通过例如通过使用石英卤素光源和光纤从挤出机流出的聚合物引导单个多色光束,然后将已经通过的单光束 通过聚合物分成两个光束,例如通过使用分叉光纤,然后将所得到的光束中的每一个通过单独的滤光器到单独的光电检测器。 选择一个滤光器的最大透射波长接近于染料的最大光吸收波长,使得与该滤光片相关的来自光电检测器的信号是从聚合物流中的染料浓度的函数 挤出机。 选择另一个滤光器的最大透射波长接近于染料和聚合物的最小光吸收波长,使得来自与该滤光片相关联的光电检测器的信号是从该滤光片流出的聚合物的背景光吸收的函数 挤出机。 染料浓度信号的噪声水平可能是由于挤出机中流出的聚合物中的气泡和夹杂物引起的问题,并且通过用背景信号校正染料浓度信号,该噪声水平被显着降低。