ASTM D1578 - 93(2016)

Standard Test Method for Breaking Strength of Yarn in Skein Form

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1.1 This test method covers the determination of the breaking strength of yarn in skein form. The observed breaking strength is expressed in units of force, and equations are provided to convert breaking strength to skein breaking tenacity and to skein break factor.Note 1: For the determination of the breaking strength and elongation of yarn by the single strand method, refer to Test Method D2256.1.2 This test method is applicable to spun yarns, either single or plied, composed of any fiber or blend of fibers, but is not suitable for yarns which stretch more than 5?% when the tension is increased from 2.5 to 7.5 mN/tex or 0.03 to 0.08 gf/denier.1.3 This test method provides three options based on the perimeter of the reel, the number of wraps in the skein, and the machine speed or time-to-break.1.3.1 Option 1—Eighty, forty, or twenty turns on a 1.50-m or 1.5-yd reel, broken at 300 mm/min or 12 in./min.1.3.2 Option 2—Fifty turns on a 1.00-m or 1-yd reel, broken at 300 mm/min or 12 in.

Number of pages: 8

International relationships :

ICS: 59.080.50 - Ropes

Item number: A002820