US Patent Issued to JSP on April 15 for "Method for producing polypropylene-based resin expanded beads and polypropylene-based resin expanded beads" (Japanese Inventors)

ALEXANDRIA, Va., June 5 -- United States Patent no. 12,275,831, issued on April 15, was assigned to JSP Corp. (Tokyo).

"Method for producing polypropylene-based resin expanded beads and polypropylene-based resin expanded beads" was invented by Tokunobu Nohara (Tokyo) and Yasutaka Ode (Utsunomiya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for producing polypropylene-based resin expanded beads includes dispersion, blowing agent impregnation, and foaming steps. Beads used in the dispersion step include a core layer having a polypropylene-based resin as a base material resin, and a fusion-bonding layer covering core layer; the beads fusion-bonding layer includes carbon black and a NOR-type hi...