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14 条记录 (耗时 0.019 秒)

    Reduction in die drool in filled resins and product improvement
    1.
    发明授权
    Reduction in die drool in filled resins and product improvement 失效
    减少灌装树脂中的流口水和产品改进

    公开(公告)号：US5008056A

    公开(公告)日：1991-04-16

    申请号：US454458

    申请日：1989-12-21

    申请人： Stuart J. Kurtz ,  Steve R. Szaniszlo

    发明人： Stuart J. Kurtz ,  Steve R. Szaniszlo

    IPC分类号： B29C47/12

    CPC分类号： B29C47/0883 ,  B29C47/28 ,  B29C47/0016

    摘要： A process for reducing die drool during extrusion of highly filled polymeric resins for production of jacketing insulation for wire and cable by incorporating into the surface of the die in contact with said resin a compound which decreases the adhesiveness between the polymeric resin and the die surface, said compound being employed in an amount sufficient to reduce die drool.

    摘要翻译： 一种用于在挤出高填充聚合物树脂期间减少模具流出的方法，用于通过将降低聚合物树脂和模具表面之间的粘合性的化合物结合到与所述树脂接触的模具的表面中来生产用于电线和电缆的护套绝缘体， 所述化合物的用量足以降低口水。

    Method and apparatus for cooling film bubble of low strain hardening polymers
    4.
    发明授权
    Method and apparatus for cooling film bubble of low strain hardening polymers 失效
    低应变硬化聚合物冷却膜气泡的方法和装置

    公开(公告)号：US4330501A

    公开(公告)日：1982-05-18

    申请号：US164293

    申请日：1980-06-30

    申请人： David N. Jones ,  Stuart J. Kurtz

    发明人： David N. Jones ,  Stuart J. Kurtz

    IPC分类号： B29C49/00 ,  B29C47/88 ,  B29C55/00 ,  B29C55/28 ,  B29D7/22

    CPC分类号： B29C47/8835 ,  B29C47/0026

    摘要： A process and apparatus are disclosed for forming blown film of a low strain hardening polymer, such as a low pressure polymerized-low density ethylene copolymer, including an improved film bubble cooling technique which permits high production rates to be achieved with good film bubble stability. The disclosed process comprises cooling a molten film bubble by contacting the outside of the film bubble with separate annular streams of cooling fluid fed through at least two stacked annular cooling rings disposed around the film bubble, wherein all or substantially all of the cooling fluid exits the system through a common plane formed by the last cooling ring.The disclosed apparatus comprises means for forming a molten film bubble and means for cooling same including at least two separate annular cooling rings disposed around the bubble, each provided with means for feeding an annular cooling fluid stream against the bubble and further including means whereby all or substantially all of said cooling fluid exits the system through a common plane formed by the last cooling ring.

    摘要翻译： 公开了一种用于形成低应变硬化聚合物的吹塑薄膜的方法和设备，例如低压聚合低密度乙烯共聚物，包括改进的薄膜气泡冷却技术，其可以以良好的膜泡稳定性实现高生产率。 所公开的方法包括通过使薄膜气泡的外部与通过设置在膜气泡周围的至少两个堆叠的环形冷却环进料的冷却流体的单独的环形流来冷却熔融膜气泡，其中全部或基本上所有的冷却流体离开 系统通过由最后一个冷却环形成的共同平面。 所公开的装置包括用于形成熔融膜气泡的装置和用于冷却装置的装置，其包括设置在气泡周围的至少两个分离的环形冷却环，每个设置有用于将环形冷却流体流供给气泡的装置，并且还包括装置， 基本上所有的冷却流体通过由最后一个冷却环形成的公共平面离开系统。

    Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer
    6.
    发明授权
    Process for reducing melt fracture during extrusion of a molten narrow molecular weight distribution, linear, ethylene copolymer 失效
    用于在熔融的窄分子量分布挤出过程中减少熔体断裂的方法，线型乙烯共聚物

    公开(公告)号：US4360494A

    公开(公告)日：1982-11-23

    申请号：US249914

    申请日：1981-04-01

    申请人： Stuart J. Kurtz

    发明人： Stuart J. Kurtz

    IPC分类号： B29C49/00 ,  B29B7/00 ,  B29B11/10 ,  B29C47/00 ,  B29C47/14 ,  B29C47/20 ,  B29C49/04 ,  B29C65/00 ,  B29D23/04

    CPC分类号： B29C47/0026 ,  B29C47/0004 ,  B29C47/14 ,  B29C47/20 ,  B29K2023/00

    摘要： A process for reducing melt fracture formed during extrusion of a molten narrow molecular weight distribution, linear, ethylene polymer, which comprises extruding said polymer through a die having a discharge outlet defining an exit die gap formed by opposing die lip surfaces and wherein one surface of the die lip and/or die land in contact with the molten polymer extends beyond the opposing surface of the die lip and/or die land in the direction of the axis of flow of the molten polymer through the die exit and wherein said extended die lip has a groove extending around said extended die lip, said groove being disposed opposite the leading edge of the opposing die lip surface whereby melt fracture is reduced on both surfaces of the polymer leaving said die exit.

    摘要翻译： 一种用于减少挤出熔融的窄分子量分布（线性乙烯聚合物）期间形成的熔体断裂的方法，其包括通过具有排出口的模具挤出所述聚合物，所述排出口限定由相对的模唇表面形成的出口模具间隙， 与熔融聚合物接触的模唇和/或模具平台沿着熔融聚合物流过模头出口的流动方向延伸超过模唇和/或模具座的相对表面，并且其中所述延伸模唇 具有围绕所述延伸的模唇缘延伸的凹槽，所述凹槽与相对的模唇表面的前缘相对设置，从而在离开模具出口的聚合物的两个表面上降低了熔体断裂。

    Mixer heads for polyolefin extruders
    8.
    发明授权
    Mixer heads for polyolefin extruders 失效
    聚烯烃挤出机的搅拌头

    公开(公告)号：US4425044A

    公开(公告)日：1984-01-10

    申请号：US313626

    申请日：1981-10-21

    申请人： Stuart J. Kurtz ,  Leonard S. Scarola ,  John C. Miller

    发明人： Stuart J. Kurtz ,  Leonard S. Scarola ,  John C. Miller

    IPC分类号： B29B7/00 ,  B29C47/00 ,  B29C47/64 ,  B29B1/06

    CPC分类号： B29C47/6043 ,  B29C47/0845 ,  B29C47/0849 ,  B29C47/0009

    摘要： In a single screw extruder mixer head for mixing high viscosity linear polyolefins materials employing a plurality of alternate longitudinal mixing and wiping barriers, the improvement of providing longitudinal radially-stepped regions on the opened bevelled leading edge portions of the outer surface of the wiping barriers to act as hydrodynamic wedges to the passage of polyolefin material passing between the surfaces and the inner walls of the extruder barrel; and radially-stepped opened bevelled leading edge portions of the outer surfaces of the wiping barriers and the outer circumferential surfaces of full diameter of the mixer head supporting an outer coating of gall-resistant material.

    摘要翻译： 在用于混合使用多个交替的纵向混合和擦拭屏障的高粘度线性聚烯烃材料的单螺杆挤出机混合机头中，改进了在擦拭屏障的外表面的敞开的倾斜前缘部分上提供纵向径向台阶区域， 作为通过在挤出机筒的表面和内壁之间通过的聚烯烃材料的流体动力楔; 和擦拭屏障的外表面的径向开放的斜边前缘部分和混合头的全直径的外圆周表面，其支撑耐磨材料的外涂层。