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发明授权
US3867492A Method of manufacturing objects containing a cavity filled with a rigid foam of polyurethane 失效
制造包含填充有聚氨酯硬质泡沫的空腔的物体的方法

Method of manufacturing objects containing a cavity filled with a rigid foam of polyurethane
摘要：
Manufacture of aritcles containing a cavity filled with rigid polyurethane foam by locating in the cavity or in the place which is to become the cavity a flexible polyurethane foam impregnated with isocyanate and protected against moisture and then removing the protectric barrier so that moisture gains access to the polyurethane foam and causes it to expand and cure to a rigid foam.
摘要（中）：

制造含有硬质聚氨酯泡沫塑料的空腔的装置，该腔体通过定位在浸入异氰酸酯并防止湿气的柔性聚氨酯泡沫的空腔或成为空腔的位置，然后移除保护隔离层，使得湿气进入 聚氨酯泡沫，并使其膨胀和固化成刚性泡沫。

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