Elastomeric yams mechanical properties

Core yam and cover yam with elastomeric fiber as the core shows lower elongation than that of the fiber itself. Usually, the draw ratio of the elastomeric fiber is from 2 to less than 4 when spinning as a core yam. Even with the elongation decrease, other mechanical properties have been improved such as tenacity, antifriction, hand feeling, and other functions such as moisture management. The elastomeric yams greatly increase the process ability and wearability of bare elastomeric fiber itself. These yams also are another important basis for functional sportswear design besides the elastomeric fibers. 

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