Method of manufacturing a foamed urethane structural product having high and low density portions
作者： Lester V Ottinger
DOI:
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摘要: Invention covers high quality molded urethane structural products comprising a unique mixture of density foam and low speed process for manufacturing the same. In essence, two (or more) formulations are spray applied from one bank application nozzles. The initial cures almost immediately is while secondary slightly overlaps, slower, relatively density.
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