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    • 5. 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
    • 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
    • US06328916B1
    • 2001-12-11
    • US09351336
    • 1999-07-12
    • Shigeo NishikawaEiichi SugiharaMasahiro TakedachiKaoru YoritaHaruo InoueYoko ShimadaMichio Eriguchi
    • Shigeo NishikawaEiichi SugiharaMasahiro TakedachiKaoru YoritaHaruo InoueYoko ShimadaMichio Eriguchi
    • B29C4402
    • B29C44/348B29C44/3446
    • 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).
    • 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。