US Patent Issued to MITSUBISHI CHEMICAL on Nov. 4 for "Method for producing polyvinyl alcohol resin" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 6 -- United States Patent no. 12,460,027, issued on Nov. 4, was assigned to MITSUBISHI CHEMICAL Corp. (Tokyo).

"Method for producing polyvinyl alcohol resin" was invented by Yoshihito Yamauchi (Tokyo) and Norihito Sakai (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing a polyvinyl alcohol resin having an absorbance of not less than 0.2 at 280 nm, which includes: melt-kneading a polyvinyl alcohol resin material; extruding the resulting melt-kneaded polyvinyl alcohol resin into a sheet; cooling the resulting polyvinyl alcohol resin sheet; and pulverizing the cooled polyvinyl alcohol resin sheet. The method ensures a higher productivity and an excellent long-run ...