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The Processing Performance of Raw Wool: Introduction to Prediction

The Processing Performance of Raw Wool: Introduction to Prediction. Produced for the CRC for Premium Quality Wool undergraduate program by; Dr. Trevor Mahar, Australian Wool Testing Authority Ltd. Fibre length in Top. Dependent on: Greasy wool Fibre length Amount of Fibre breakage

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The Processing Performance of Raw Wool: Introduction to Prediction

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  1. The Processing Performance of Raw Wool: Introduction to Prediction Produced for the CRC for Premium Quality Wool undergraduate program by; Dr. Trevor Mahar, Australian Wool Testing Authority Ltd.

  2. Fibre length in Top • Dependent on: • Greasy wool Fibre length • Amount of Fibre breakage • Location of breakage along Fibre • short fibre is combed out • Can be estimated (predicted) by raw wool properties • Staple Length (SL) • Staple Strength (SS) • Position of break (POB) Trevor Mahar

  3. TEAM • Trials Evaluating Additional Measurement • PREDICTION based on Objective Measurements • used simple regression techniques • 603 consignments (88,000 bales) • 28 mills in 12 countries • managed by industry committee Trevor Mahar

  4. H = 0.52L + 0.47S + 0.95D - 0.19M* - 0.45V - 3.5 H = Hauteur (mm) L = Staple Length (mm) S = Staple Strength (N/ktex) D = Fibre Diameter (µm) M*= Adjusted % mid breaks (%) V = Vegetable Matter Base (%) TEAM formula for Hauteur Trevor Mahar

  5. STAPLE LENGTH 100 STAPLE STRENGTH 88 DIAMETER 46 M* 40 VM 19 Relative Importance of Properties Trevor Mahar

  6. Noil% (N%) N = - 0.11L - 0.14S - 0.35D + 0.94V + 27.7 Coefficient of Variation of Hauteur (CVH) CVH = 0.12L - 0.41S - 0.35D + 0.2M* + 49.3 Further TEAM formulas Trevor Mahar

  7. 120 Standard Deviation: 3.4mm 100 80 Frequency 60 40 20 0 -10 -8 -6 -4 -2 0 2 4 6 8 10 (Actual - Predicted) Hauteur (mm) Accuracy of TEAM predictions Trevor Mahar

  8. Accuracy of TEAM - 4 mills Accuracy of Topmakers - 4 Mills S.D. = 2.8mm S.D. = 3.2mm -10 -8 -6 -4 -2 0 2 4 6 8 10 -10 2 4 6 -8 -6 -4 -2 0 8 10 (Actual - Predicted) Hauteur (mm) Objective vs Subjective Trevor Mahar

  9. Recommendations • Formulas • Mill specific activities • Encourage additional measurements • Improve wool metrology • Improve processing knowledge • Harmonise testing Trevor Mahar

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