Shrinkage hot air (SHA), free shrinkage of Polymer Yarns

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.

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