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Strength Testing

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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Strength Testing

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  1. Strength Testing

  2. What is strength? • Power to resist something or resistance

  3. Fiber strength … • Strength of fiber affects yarn strength, fabric strength, hand feel, drape and similar properties • Fiber strength ∞ Yarn Strength • Yarn strength ∞ Stiffness

  4. Pressley Strength Tester… • Please see notes

  5. Yarn Strength … • Single Yarn Strength • Lea Strength • CLSP (Count, Lea Strength Product) • Breaking Length • CLSP ∞ 160(Single yarn strength)

  6. Lea Strength Tester

  7. 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

  8. Bursting and Tearing strength

  9. Strip Test … • For woven fabrics • Sample size = 1 X 6 inches • Speed = 12 inches / minute

  10. Bursting Strength … • For Knitted fabrics • Circular Sample

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