This invention relates to a process for forming composite yarns comprising an elastic filament and at least one relatively inelastic filament, which process comprises entangling a latent-contractable elastomer producing polymer filament with a relatively inelastic filament while the latent-contractable...http://www.google.ca/patents/US4554121?utm_source=gb-gplus-sharePatent US4554121 - Method of forming latent-contractable elastomeric composite yarns
