US Patent Issued on June 2 for "Method for manufacturing a new sound-absorbing and noise-reducing material by using polyimide foam scraps" (Chinese Inventor)

ALEXANDRIA, Va., June 2 -- United States Patent no. 12,643,986, issued on June 2.

"Method for manufacturing a new sound-absorbing and noise-reducing material by using polyimide foam scraps" was invented by Zhiyi Lu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention discloses a method for manufacturing a new sound-absorbing and noise-reducing material by using polyimide foam scraps, cutting and processing the scraps generated in the process of polyimide foam production into particles of different sizes, drying red iron oxide or black iron oxide or titanium dioxide as inorganic additive, and then using each component in parts by weight, putting the inorganic additive into the mixer, and the...