Kevlar KM2 Yarn and Fabric Strength Under Quasi-Static Tension

摘要

Kevlar KM2, 600 denier, was Instron tested in quasi-static, uniaxial tension to determine its strength. Specimens included both single yarns and 68- yarn-wide, single-ply strips of plain-woven fabric (Style 706). Never-woven single-yarn speciens were tested with varying degrees of initial twist. Strength of the untwisted, never-woven yarn was 2.66 +/= 0.04 GPa. The twist multiplier was 1.2. Single warp-oriented and fill-oriented yarns were extracted from Style 706 fabric, tested, and found to have strengths of 2.06 +/= 0.01 and 2.20 % 0.05 GPa, respeptively. The single-ply fabric specimens of both warp and fill orientations were tested and found to have strengths of 2.23 +/= 0.04 and 2.67 +/= 0.04 GPa, respectively. The strength effects of weaving, finishing, yarn extraction, and inter-yarn contact are discussed.