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NOVEL PROCESS FOR MAKING POLYURETHANE REDUCED CRUSHING IN PREVENTING SAID PRODUCTS FROM SUBSTANT MENSIONALLY UPON COOLING PROCESS FOR MAKING POLYURETHANE PRODUCTS
NOVEL PROCESS FOR MAKING POLYURETHANE REDUCED CRUSHING IN PREVENTING SAID PRODUCTS FROM SUBSTANT MENSIONALLY UPON COOLING PROCESS FOR MAKING POLYURETHANE PRODUCTS
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机译:在制造聚氨酯产品的冷却过程中,从实质性意义上说,是一种防止聚氨酯泡沫破碎的新方法。
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摘要
A process for making molded high resilience polyurethane cellular products which require reduced crushing in preventing the products from substantially shrinking or changing dimensionally upon cooling which comprises: exposing the curing product to atmospheric pressure while in contact with the confines of the mold at a time when the cell walls of the curing polyurethane cellular product have cured sufficiently to develop sufficient strength to partially resist bursting by the pressure of said expansion gases contained within the cell walls upon exposure to atmospheric pressure, but before the cell walls have cured sufficiently to develop sufficient strength so that exposure to atmospheric pressure does not result in a reduction of the crushing force necessary to prevent the products from substantially shrinking or changing dimensionally.
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