ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,552, issued on June 24, was assigned to KURARAY Co. LTD. (Kurashiki, Japan).
"Composite fiber" was invented by Shoji Onogi (Osaka, Japan), Takayuki Ikeda (Kurashiki, Japan), Shinya Kawakado (Saijo, Japan) and Hitoshi Nakatsuka (Saijo, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention relates to a composite fiber for obtaining a fiber having a strength at 100% elongation of 0.04 cN/dtex or less, wherein the composite fiber is composed of component X comprising a polyvinyl-based thermoplastic elastomer, or a thermoplastic polyurethane elastomer having a glass transition temperature of 0deg C. or lower, and component Y which is...