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    • 5. 发明申请
    • TREATING POLYSTYRENE FOAM
    • 处理聚苯乙烯泡沫
    • WO2003024684A1
    • 2003-03-27
    • PCT/US2002/029659
    • 2002-09-20
    • ATLAS ROOFING CORPORATION
    • DEMPSEY, Richard, W.REDINGTON, Thomas, A.BLANPIED, Robert, H.
    • B29B13/02
    • B29C43/48B29B13/021B29B17/0036B29C33/04B29C33/60B29C43/006B29C43/228B29C43/52B29C44/5636B29C2043/3416B29C2043/5816B29K2025/00B29K2105/04B29K2105/251B29K2105/26Y02W30/62
    • Polystyrene foam scrap particulate is treated ( e.g. , recycled) to increase density while minimizing amount of heat required to convert it into densified solid flakes, avoiding noticeable polymer degradation. Polystyrene particulates are first heated to a semi-molten state in a heating zone (30) so that the particulates coalesce. Pressure is then applied in a pressure zone (40) while the polystyrene is coalescing, using a pressure mechanism (20, 42) which crushes the heated and softened polystyrene, maintaining the pressure until it cools below its softening temperature, squeezing out essentially all gases and precluding rebounding to a pre-crushed density. The sustained pressure obviates utilization of a degree of heat which would melt the polystyrene to its completely molten state. The sustained crushing and cooling enhances the bulk density, producing flakes having an average thickness of 0.010 inch to 0.035 inch. An enhanced bulk density throughput index in excess of 500 is obtained.
    • 将聚苯乙烯泡沫废料颗粒处理(例如,再循环)以增加密度,同时最小化将其转化成致密固体薄片所需的热量,避免显着的聚合物降解。 聚苯乙烯微粒首先在加热区(30)中被加热到半熔融状态,使得颗粒聚结。 然后使用压缩加热和软化的聚苯乙烯的压力机构(20,42)将压力施加在压力区(40)中,同时聚苯乙烯聚结,保持压力,直到其冷却到低于其软化温度,挤出基本上所有的气体 并排除反弹至预先破碎的密度。 持续的压力消除了将聚苯乙烯熔化成其完全熔融状态的一定程度的热量的利用。 持续的破碎和冷却增强了堆积密度,产生了平均厚度为0.010英寸至0.035英寸的薄片。 获得超过500的增强堆密度通量指数。