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公开(公告)号：US4954302A
公开(公告)日：1990-09-04
申请号：US238507
申请日：1988-08-31
IPC分类号： D01D1/06
CPC分类号： D01D1/06
摘要： A process for controlling the relative viscosity of synthetic yarns during production thereof. At least three pressure measurements are taken at three spaced locations in a transfer line for carrying molten polymer to a spinneret. Temperature and throughput of polymer in said transfer line are measured. An estimated relative viscosity of yarn produced by employing a predetermined correlation between pressure drop, throughput, temperature and relative viscosity is then calculated. A meaningful operating condition in the melting zone is adjusted in response to deviations in the estimated relative viscosity of said yarn from a desired relative viscosity of said yarn.
摘要翻译： 一种在制造合成纱线时控制合成纱线的相对粘度的方法。 在传送管线中的三个间隔位置处进行至少三次压力测量，以将熔融聚合物运送到喷丝头。 测量所述传输线中聚合物的温度和通量。 然后计算通过使用压降，通量，温度和相对粘度之间的预定相关性所产生的纱线的估计相对粘度。 响应于所述纱线的估计相对粘度与所述纱线的期望相对粘度的偏差而调整熔融区域中的有意义的操作条件。
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公开(公告)号：US5695698A
公开(公告)日：1997-12-09
申请号：US594277
申请日：1996-01-30
摘要： A process and apparatus for the continuous solid state forming of semicrystalline polymers using roll-drawing is disclosed. The output of an extruded thick polymer profile is stabilized by a gear pump. The profile is passed through a die for the desired geometry and a cooling calibrator. The profile is heat conditioned in heating tunnels to a temperature below the melting point prior to deformation between sets of rolls. A plurality, e.g. four pairs of rolls apply both compression and tension to the polymer profile. The tension applied on the profile, the roll gap, the linear speed of the profile and its temperature are monitored and controlled for the amount of polymer deformation and relaxation allowed. High tensile modulus and strength, both in the longitudinal and transverse direction of the polymeric strip, can be achieved.
摘要翻译： 公开了一种使用辊拉连续固态形成半结晶聚合物的方法和装置。 挤出的厚聚合物轮廓的输出由齿轮泵稳定。 轮廓通过模具以获得所需的几何形状和冷却校准器。 在加热隧道之前，将轮廓加热调节至低于熔点的温度，然后在辊组之间变形。 多个，例如。 四对辊对聚合物轮廓施加压缩和张力。 监测和控制施加在型材上的张力，辊间隙，轮廓的线速度及其温度，以允许聚合物变形和松弛的量。 可以实现在聚合物条的纵向和横向方向上的高拉伸模量和强度。
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3.发明授权Method and device for evaluation of surface properties, especially molecular orientation, in non-transparent layers 失效用于评估非透明层中表面性质，特别是分子取向的方法和装置
公开(公告)号：US5365067A
公开(公告)日：1994-11-15
申请号：US83468
申请日：1993-06-30
CPC分类号： G01N21/21
摘要： A method and apparatus for determining surface molecular orientation and related properties of an opaque polymeric sheet relies on the detection of relative intensity of spectral reflectance in at least one polarized beam reflected from the surface of the sheet rather than transmitted therethrough. The relative intensity is affected by the preferential orientation of the polymeric chains. The method is fast and can be applied on-line at a speed of the running sheet as high as 1000 m/s.
摘要翻译： 用于确定不透明聚合物片材的表面分子取向和相关性质的方法和装置依赖于从片材表面反射的至少一个偏振光束中的光谱反射率的相对强度的检测，而不是从其透射。 相对强度受聚合物链优先取向的影响。 该方法快速，可以以高达1000m / s的速度在线上运行。
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