Injection-expansion molded, thermoplastic resin product and production
process thereof
    3.
    发明授权
    Injection-expansion molded, thermoplastic resin product and production process thereof 失效
    注塑膨胀成型,热塑性树脂制品及其制造方法

    公开(公告)号:US5997781A

    公开(公告)日:1999-12-07

    申请号:US829603

    申请日:1997-03-31

    Abstract: Disclosed is a process for the production of an injection-expansion molded, thermoplastic resin product. The process comprises a gas dissolving step, a cooling step, a metering and injection step, and an expansion controlling step. Specifically, a thermoplastic resin is molten in a continuous plasticator (1), supercritical carbon dioxide and/or nitrogen is added as a blowing agent, and the blowing agent and the thermoplastic resin are formed into a mutually-dissolved state. The resultant molten resin composition is cooled within the plasticator while maintaining a pressure equal to or higher than a critical pressure of the blowing agent. The thus-cooled molten resin composition is metered by an injector (7) and is filled in a mold (8). An internal pressure of the mold is lowered beyond the critical pressure of the blowing agent to produce cell nuclei, whereby the cell diameter is controlled. The blowing agent is maintained in a supercritical state up to the metering and injection step.

    Abstract translation: 公开了一种用于生产注射膨胀模制的热塑性树脂产品的方法。 该方法包括气体溶解步骤,冷却步骤,计量和注入步骤以及膨胀控制步骤。 具体地说,热塑性树脂在连续塑化器(1)中熔融,加入超临界二氧化碳和/或氮作为发泡剂,发泡剂和热塑性树脂形成相互溶解状态。 将所得熔融树脂组合物在塑化器内冷却,同时保持等于或高于发泡剂临界压力的压力。 如此冷却的熔融树脂组合物由注射器(7)计量并填充在模具(8)中。 模具的内部压力降低到超过发泡剂的临界压力以产生细胞核,从而控制细胞直径。 发泡剂维持在超临界状态直到计量和注射步骤。

    Process for preparing expanded product of thermoplastic resin
    4.
    发明授权
    Process for preparing expanded product of thermoplastic resin 失效
    制备热塑性树脂膨胀产品的方法

    公开(公告)号:US5830393A

    公开(公告)日:1998-11-03

    申请号:US887323

    申请日:1997-07-02

    CPC classification number: B29C44/461 B29C44/3446 B29C44/348 Y10S264/13

    Abstract: A process for preparing an expanded product of a thermoplastic resin which includes a gas dissolving step of adding supercritical carbon dioxide and/or nitrogen as an blowing agent to a thermoplastic resin, and melting it in the thermoplastic resin, a cooling step of cooling the resulting molten resin composition under a pressure not less than a critical pressure of the blowing agent, a nuclei forming step of discharging the molten resin composition from a die to lower the pressure to a level not more than the critical pressure, and an expansion controlling step of cooling an expanded product of the thermoplastic resin to a level not more than a glass transition temperature or a crystallization temperature of the resin to control a cell diameter of the expanded product.

    Abstract translation: 一种制备热塑性树脂的发泡产品的方法,包括将超临界二氧化碳和/或氮气作为发泡剂加入到热塑性树脂中并在热塑性树脂中熔化的气体溶解步骤,冷却步骤, 在不低于发泡剂的临界压力的压力下的熔融树脂组合物,将熔融树脂组合物从模具中排出以将压力降低到临界压力以下的成核步骤,以及膨胀控制步骤 将热塑性树脂的发泡产品冷却至不超过树脂的玻璃化转变温度或结晶温度的水平,以控制膨胀产品的泡孔直径。

    Molding machine for injection foaming
    5.
    发明授权
    Molding machine for injection foaming 有权
    注塑机成型机

    公开(公告)号:US07150615B2

    公开(公告)日:2006-12-19

    申请号:US10909401

    申请日:2004-08-03

    Abstract: A process for injection-foaming a thermoplastic resin by using an injection molding machine with a two-stage-compression screw, injecting a physical foaming agent into the cylinder of the machine at a pressure lower than the storage pressure of the physical foaming agent, mixing it with a melted resin and expanding the volume of the cavity of the mold at the time of injection, and an injection molding machine and resin composition suitable therefore.

    Abstract translation: 通过使用具有两级压缩螺杆的注射成型机将热塑性树脂注射发泡的方法,将物理发泡剂以低于物理发泡剂的储存压力的压力向机器的气缸中注入,混合 其具有熔融树脂并且在注射时膨胀模具的空腔的体积,因此适用于注塑机和树脂组合物。

    Foam of ultra high molecular weight polyethylene and process for the preparation of the same
    6.
    发明申请
    Foam of ultra high molecular weight polyethylene and process for the preparation of the same 审中-公开
    泡沫超高分子量聚乙烯及其制备方法相同

    公开(公告)号:US20060234033A1

    公开(公告)日:2006-10-19

    申请号:US11092887

    申请日:2005-03-29

    Abstract: The expanded product of the present invention is an expanded product having a density of from 0.02 to 0.7 g/cm3, which is obtained by expanding ultra-high-molecular-weight polyethylene having a viscosity average molecular weight of from 300,000 to 10,000,000. This expanded product can be prepared by adding carbon dioxide to ultra-high-molecular-weight polyethylene in the molten state in an extruder, and expanding the resin by extrusion such that each of the surface temperature and the central part temperature of the resin immediately after discharge from the die may be a predetermined temperature, while at the same time setting the residence time and pressure of the resin at the die section to specific values. Based on these, the invention provides an expanded product with good external appearance, having a skin layer to which the functions such as light weight, insulating property, sound absorption, low dielectric constant, impact absorption, flexibility and the like can be imparted without significantly deteriorating the excellent features of abrasion resistance, self-lubrication, impact strength, cryogenic properties and chemical resistance that are inherent to ultra-high-molecular-weight polyethylene; and a process for preparation of the expanded product stably.

    Abstract translation: 本发明的发泡产品是通过使具有粘均分子量的超高分子量聚乙烯发泡而获得的密度为0.02-0.7g / cm 3的发泡产品 从30万到10,000,000。 该膨胀产物可以通过在挤出机中以熔融状态向超高分子量聚乙烯中加入二氧化碳,并通过挤出使树脂膨胀,使得树脂的表面温度和中心部分温度立即在 从模具排出可以是预定温度,同时将树脂在模具部分的停留时间和压力设定为具体值。 基于这些,本发明提供了具有良好外观的膨胀产品,其具有皮肤层,能够赋予诸如重量轻,绝缘性能,吸声性,低介电常数,冲击吸收性,柔软性等功能的表皮层 劣化超高分子量聚乙烯固有的耐磨性,自润滑性,冲击强度,低温性能和耐化学性的优异特征; 以及稳定地制备膨胀产品的方法。

    Addition method of supercritical carbon dioxide, and production process of expanded thermoplastic resin product by making use of the addition method
    7.
    发明授权
    Addition method of supercritical carbon dioxide, and production process of expanded thermoplastic resin product by making use of the addition method 有权
    超临界二氧化碳的添加方法,以及通过添加方法生产膨胀热塑性树脂制品的方法

    公开(公告)号:US06328916B1

    公开(公告)日:2001-12-11

    申请号:US09351336

    申请日:1999-07-12

    CPC classification number: B29C44/348 B29C44/3446

    Abstract: This invention provides a method for stably adding a predetermined amount of supercritical carbon dioxide at a fixed delivery rate into a forming machine and also a process for producing an expanded thermoplastic resin product by making use of the addition method. Carbon dioxide is charged from a liquefied carbon dioxide cylinder (1) into a predetermined amount deliverable pump (2) while allowing the carbon dioxide to remain in a liquefied state. When the carbon dioxide is pressurized and delivered by the predetermined amount deliverable pump (2), a delivery pressure of the carbon dioxide is controlled at an optional pressure within a range of from a critical pressure (7.4 MPa) of carbon dioxide to 40 MPa to deliver the carbon dioxide without any fluctuation of the amount of the delivery by setting up the pressure of a pressure control valve (3). The carbon dioxide is heated to a critical temperature (31° C.) of carbon dioxide or higher to convert it into supercritical carbon dioxide. This supercritical carbon dioxide is then added to a molten thermoplastic resin in the forming machine (4).

    Abstract translation: 本发明提供了一种以固定的输送速率将预定量的超临界二氧化碳稳定地添加到成形机中的方法,以及通过使用添加方法制造发泡热塑性树脂产品的方法。 二氧化碳从液化二氧化碳气瓶(1)装入预定量的输送泵(2)中,同时使二氧化碳保持在液化状态。 当二氧化碳被预定量的可输送泵(2)加压和输送时,二氧化碳的输送压力被控制在从二氧化碳的临界压力(7.4MPa)到40MPa的范围内的任选压力到 通过设置压力控制阀(3)的压力来输送二氧化碳而没有输送量的任何波动。 将二氧化碳加热至二氧化碳或更高的临界温度(31℃)以将其转化为超临界二氧化碳。 然后将该超临界二氧化碳加入到成形机(4)中的熔融热塑性树脂中。

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