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Strength Testing. What is strength?. Power to resist something or resistance. Fiber strength …. Strength of fiber affects yarn strength, fabric strength, hand feel, drape and similar properties Fiber strength ∞ Yarn Strength Yarn strength ∞ Stiffness. Pressley Strength Tester….
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What is strength? • Power to resist something or resistance
Fiber strength … • Strength of fiber affects yarn strength, fabric strength, hand feel, drape and similar properties • Fiber strength ∞ Yarn Strength • Yarn strength ∞ Stiffness
Pressley Strength Tester… • Please see notes
Yarn Strength … • Single Yarn Strength • Lea Strength • CLSP (Count, Lea Strength Product) • Breaking Length • CLSP ∞ 160(Single yarn strength)
Fabric Strength … • Tearing Strength • Measure of resistance to tearing of either warp or weft yarn • Bursting Strength • Measure of overall resistance of both warp and weft against a force applied perpendicularly
Strip Test … • For woven fabrics • Sample size = 1 X 6 inches • Speed = 12 inches / minute
Bursting Strength … • For Knitted fabrics • Circular Sample