ALEXANDRIA, Va., Sept. 15 -- United States Patent no. 12,735,544, issued on Sept. 15, was assigned to DMN MATERIAL TECHNOLOGY (JIANGSU) Ltd. (Nanjing, China).
"Process for foaming using carbon dioxide solution" was invented by Peng Bai (Nanjing, China) and Zhenxiu Zhang (Nanjing, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a foaming process using carbon dioxide solution, comprising: put a parison into the carbon dioxide solution for primary foaming, remove and put the parison into the carbon dioxide solution for secondary foaming to get the foam product. Compared with foaming process using high-pressure gas directly, the foaming process using polar liquid system can get a un...