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Strength Testing - PowerPoint PPT Presentation

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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