Methods for rapid purging of blowing agents from foamed polymer products

作者: Thomas M. Pontiff , Joseph P. Rapp

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摘要: Objects of thermoplastic polymer foam such as, e.g., sheeting polyolefins as polyethylene, are treated at elevated temperatures effective to rapidly purge the a substantial portion residual blowing agent. Significant economies achieved by reducing amounts agents (such flammable, toxic or environmentally hazardous gases) levels presenting no fire hazard other safety hazards in times substantially less than required conventional aging under ambient conditions. The processes can be carried out ovens heating zones which form continuations basic production line, with extracted recycled disposed combustion.

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