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SOME EFFECTS OF BLEND ON STRUCTURE
FABRIC RESEARCH LABS INC BOSTON MASS
Studies were made of the geometry of blended woolen yarns and the data applied in the description and analysis of the tensile and flexural behavior of the yarns. Fiber crimp contributes to the low load tensile softness of a yarn. Fiber and yarn elastic recovery from tension follow each other very closely except that geometric effects may tend to distort the behavior of blended yarns out of proportion to blend composition. Tensile strength of blended yarns can be predicted. Packing density of yarns is influenced by yarn twist and blend composition. The flexural rigidity of yarns ranges from slightly less than to about double or triple the theoretical sum of fiber rigidities. The general trends with twist and blend can be explained and related to the packing density. Author