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1. 发明授权

US5411689A Method for accelerating removal of residual blowing agent from extruded flexible foams 失效
标题翻译：从挤出的柔性泡沫中加速除去残余发泡剂的方法
公开(公告)号：US5411689A
公开(公告)日：1995-05-02
申请号：US37036
申请日：1993-03-25
申请人： Shau-Tarng Lee , Andrew Oiestad
发明人： Shau-Tarng Lee , Andrew Oiestad
IPC分类号： B29C35/02 , B29C37/00 , B29C44/56 , B29C44/00
CPC分类号： B29C35/0277 , B29C44/56 , B29C44/5609 , B29C37/006 , B29K2105/046 , Y10S264/15
摘要： A method is disclosed for accelerating the removal of blowing agent from elongate, flexible polyolefin foam bodies, such as polyethylene foam sheeting, in the absence of substantial tension on the foam body so as to avoid breaks in the foam body. The elongate flexible foam body is introduced into a heating zone and draped over a plurality of substantially parallel bars in an endless path. Tension on the foam body is avoided because the foam loops are free hanging between these parallel bars. An endless drive means transports the parallel bars through the heating zone about the endless path, thereby transporting the foam body through the heating zone for removal of blowing agent. Forced heated air is blown over the exposed surface of the foam body at a pre-determined temperature and for a pre-determined time sufficient to remove a substantial portion of the residual blowing agent and to cause sufficient air to diffuse into the foam body so that there is no substantial reduction in the thickness of the foam.
摘要翻译：公开了一种用于在泡沫体上不存在实质张力的情况下加速从细长的柔性聚烯烃泡沫体（例如聚乙烯泡沫片）中除去发泡剂的方法，以避免泡沫体中的断裂。细长的柔性泡沫体被引入加热区域并且在多个基本上平行的条上悬挂在环形路径中。避免泡沫体上的张力，因为泡沫环自由悬挂在这些平行杆之间。环形驱动装置将平行杆通过围绕环形路径的加热区输送，从而将泡沫体输送通过加热区以除去发泡剂。强制加热的空气以预定的温度吹过泡沫体的暴露的表面，并且预定时间足以除去大部分的残留的发泡剂并引起足够的空气扩散到泡沫体中，使得泡沫的厚度没有显着降低。

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