聚氨酯海绵就是泡沫密度低于18 kg/m3以下的低密度PU,方法通常是水用量超过4.5份(每100份多元醇),TDI用量超过55份,泡沫的散热问题就非常突出,由于泡沫内部的热量不易散发,在发泡过程中温度自动升温超过180℃,会引起泡沫自燃,导致火灾危险。
用聚氨酯海绵法制备网眼多孔陶瓷。
Reticulated porous ceramics (SPC) were prepared by the polymeric sponge method.
它用聚氨酯海绵制造;
在制备泡沫镍材料的过程中,首先要求在聚氨酯海绵基体上低磷化学镀镍制备导电层。
As an initial stage on the process of foamed nickel preparation, a layer with low phosphorus content nickel deposit is applied on polyurethane foam substrate as a conducting layer.
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