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Hot Air Shrinkage (HAS) without yarn tension

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Free shrinkage of Polymer Yarns

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Description

The free shrinkage (without any yarn tension) can be measured of yarns and cords according to BISFA 2004 Ch 10.4 or ASTM D 2259-02. A normal procedure for PET yarns is 15 minutes at 190 °C. All measurements are standard done at 3 specimen (n=3) and average values are reported.