METHOD FOR EVALUATING RIGIDITY OF ENZYME-PROCESSED FLAX-CONTAINING YARN Russian patent published in 2007 - IPC G01N19/00 D06M16/00 

FIELD: textile industry, in particular, controlling of yarn processing with enzymes in manufacture of textile materials.

SUBSTANCE: method involves processing single-twist flax-containing yarn comprising 5-50% of short flax fibers with wool and/or synthetic filaments with the use of known amounts of enzymes and conditioning; thereafter, finding out dependence between flexural rigidity defined on the basis of labor consumed for deformation at constant speed of samples of predetermined length against surface having constant curvature, sample length and curvature radius, and averaged on n samples, and number of twists until rupture occurs in direction corresponding to initial twisting of yarn, said parameters being measured after preliminary stretching of samples; measuring number of twists until rupture occurs in indicated manner; determining, on the basis of found out dependence, flexural rigidity corresponding to measured number of twists until rupture occurs.

EFFECT: increased operational efficiency and simplified evaluation of flax-containing yarn for flexural rigidity after processing of individual batches with enzymes at different times in apparatus having single charging volume substantially smaller than amount of basic yarn, and retention of flexural rigidity quality due to yarn twisting until rupture occurs.

5 dwg, 4 tbl