Patent ID: 7469526
Filing Date: 2008-12-30
Classification: D02G,D10B,Y10T

Abstract:
1. A heat and flame resistant sewing thread, comprising: a core strand comprising glass material filaments having an elongation of between about 1% to about 5%; a sheath of substantially heat resistant staple fibers, including microdenier aramid fibers selected from the group comprising meta-aramid and para-aramid fibers, ring spun about said core strand in a counterclockwise direction with a level of twist sufficient to cause contraction of said core strand; and wherein at least a portion of said core strand and said staple fibers of said sheath spun about core strand is subjected to twisting in a clockwise direction with a level of twist sufficient to negate torque effects resulting from ring spinning said microdenier fibers about said core strand and to generate additional contraction of said core strand.