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公开(公告)号：US4687641A
公开(公告)日：1987-08-18
申请号：US720820
申请日：1985-04-08
CPC分类号： B29C44/3461 , C08J11/02 , C08J9/228 , Y10S264/09
摘要： A process and apparatus for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and simultaneously recovering the foaming agent volatilized from the thermoplastic resin particles by discharging the foaming agent out of the space in the low-pressure vessel with controlling the pressure in the low-pressure vessel to substantially a given pressure. According to the process, the release of the volatile foaming agent into the air is prevented.
摘要翻译： 一种制备热塑性树脂预发泡颗粒的方法和装置，包括： 在高压下加热包含在压力容器中含有挥发性发泡剂和水性介质的热塑性树脂颗粒的水分散体; 将分散体从压力容器释放到密封的低压容器内的空间，其中压力低于压力容器中的压力，由此使热塑性树脂颗粒膨胀以产生预发泡颗粒; 同时通过将低压容器内的压力控制在基本给定的压力下，将发泡剂从低压容器的空间排出，同时回收从热塑性树脂颗粒挥发的发泡剂。 根据该方法，可以防止挥发性发泡剂向空气中的释放。
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公开(公告)号：US4525485A
公开(公告)日：1985-06-25
申请号：US647659
申请日：1984-09-06
CPC分类号： B29C44/3461 , C08J11/02 , C08J9/228 , Y10S264/09
摘要： A process for preparing pre-expanded particles of a thermoplastic resin which comprises; heating under an elevated pressure an aqueous dispersion comprising thermoplastic resin particles containing a volatile foaming agent and an aqueous medium in a pressure vessel; releasing the dispersion from the pressure vessel into a space within a sealed low-pressure vessel wherein the pressure is lower than that in the pressure vessel, whereby expanding the thermoplastic resin particles to give pre-expanded particles; and simultaneously recovering the foaming agent volatilized from the thermoplastic resin particles by discharging the foaming agent out of the space in the low-pressure vessel with controlling the pressure in the low-pressure vessel to substantially a given pressure. According to the process, the release of the volatile foaming agent into the air is prevented.
摘要翻译： 一种制备热塑性树脂预发泡颗粒的方法，包括： 在高压下加热包含在压力容器中含有挥发性发泡剂和水性介质的热塑性树脂颗粒的水分散体; 将分散体从压力容器释放到密封的低压容器内的空间，其中压力低于压力容器中的压力，由此使热塑性树脂颗粒膨胀以产生预发泡颗粒; 同时通过将低压容器内的压力控制在基本给定的压力下，将发泡剂从低压容器的空间排出，同时回收从热塑性树脂颗粒挥发的发泡剂。 根据该方法，可以防止挥发性发泡剂向空气中的释放。
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公开(公告)号：US5821272A
公开(公告)日：1998-10-13
申请号：US339
申请日：1998-01-20
CPC分类号： C08J9/22 , B29C44/3461 , B29C44/5609 , C08J2323/02 , Y10S264/09 , Y10S521/918
摘要： Post-treatment method of polyolefin resin pre-expanded particles comprising: introducing the polyolefin resin pre-expanded particles foamed by using an inflammable blowing agent into an extraction vessel filled with steam previously; feeding an additional steam into the extraction vessel; extracting the inflammable blowing agent gas from the polyolefin resin pre-expanded particles; discharging the resulting steam which contains the extracted inflammable blowing agent gas from the extraction vessel continuously or intermittently; and liquefying the steam to separate and recover the inflammable blowing agent gas. According to the post-treatment method of polyolefin resin pre-expanded particles, the inflammable blowing agent can be extracted from the pre-expanded particles in a short period of time and the extracted inflammable blowing agent can be re-used.
摘要翻译： PCT No.PCT / JP97 / 02074 Sec。 371日期1998年1月20日 102（e）日期1998年1月20日PCT提交1997年6月16日PCT公布。 第WO97 / 48759号公报 日期1997年12月24日聚烯烃树脂预发泡粒子的后处理方法包括：将通过使用可燃性发泡剂发泡的聚烯烃树脂预发泡颗粒引入预先装有蒸汽的萃取容器中; 将额外的蒸汽进料到提取容器中; 从聚烯烃树脂预发泡颗粒中提取易燃发泡剂气体; 从提取容器中连续或间歇地排出含有提取的易燃发泡剂气体的所得蒸汽; 并使蒸汽液化以分离和回收易燃发泡剂气体。 根据聚烯烃树脂预发泡颗粒的后处理方法，可以在短时间内从预发泡颗粒中提取易燃发泡剂，并且可以重新使用提取的可燃性发泡剂。
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公开(公告)号：US5248459A
公开(公告)日：1993-09-28
申请号：US730789
申请日：1991-07-23
申请人： Yukio Fukasawa , Hisatoshi Fukui , Shiro Tojo
发明人： Yukio Fukasawa , Hisatoshi Fukui , Shiro Tojo
IPC分类号： B29C44/00 , B29C44/44 , B29C44/60 , B29K25/00 , B29K105/00
CPC分类号： B29C44/60 , B29C44/445 , B29C2037/903
摘要： A method of manufacturing a molded resin foam by charging pre-expanded resin pellets into a cavity of a mold and subjecting them to expansion molding. In order to minimize differences in weight of the foam from product to product, the method is characterized in that prior to charging, the apparent density of the pre-expanded resin pellets is measured and, upon charging, the cracking width of the mold is regulated, on the basis of the measurement result, to a definite value determined depending upon the apparent density, whereby the weight of the pellets charged in the mold cavity is made constant. An apparatus for carrying out the method is characterized by providing an automatic expansion molding machine with an arrangement (2,3,4) for sampling a feedstock from a feed-stock hopper (1) and measuring its apparent density before molding, equipment (8) for measuring a current mold-closing position which interlocks with a mold opening or closing positioner (9), and a computer automatic cracking width control device (10) for obtaining the inputs of measured apparent density value and current mold-closing position from the former two, computing an optimal cracking width based on apparent density according to a program prepare beforehand, closing a hydraulic feed line for mold closing of a hydraulic mold opening or closing unit (11-16), and stopping the mold-closing at a position of the optimal cracking width.
摘要翻译： PCT No.PCT / JP90 / 01532 Sec。 371日期：1991年7月23日 102（e）日期1991年7月23日PCT 1990年11月26日PCT PCT。 公开号WO91 / 08102 日期：1991年6月13日。一种通过将预发泡树脂颗粒装入模具的空腔并对其进行膨胀成型制造模制树脂泡沫的方法。 为了使产品与产品的重量的差异最小化，该方法的特征在于，在充电之前，测量预发泡树脂颗粒的表观密度，并且在充电时，模具的开裂宽度被调节 基于测量结果，确定取决于表观密度的确定值，由此将填充在模腔中的颗粒的重量变为恒定。 一种用于实施该方法的装置的特征在于提供一种自动膨胀成型机，其具有用于从原料料斗（1）取样原料并测量其成型前的表观密度的装置（2,3,4），设备（8 ），用于测量与模具打开或关闭定位器（9）互锁的当前模具关闭位置;以及计算机自动裂缝宽度控制装置（10），用于从所述模具打开或关闭定位器（9）获得测量的表观密度值和当前模具关闭位置的输入 前者二，根据预先准备的程序计算出基于表观密度的最佳裂缝宽度，关闭用于液压模具打开或关闭单元（11-16）的模具关闭的液压进给管线，并且在模具闭合位置停止 的最佳开裂宽度。
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