METHOD OF TESTING TEXTILE MATERIAL FOR FORMABILITY Russian patent published in 2001 - IPC

FIELD: light industry and general service. SUBSTANCE: method involves preparing sample for testing; fixing sample in clamping unit of tensile-testing machine; measuring sample deflection upon applying of tensile force; releasing sample and providing relaxation. Tensile force is 0.75 of Pp, where Pp is tensile load. Sample is left for relaxation in active media. Process formability and operational formability are determined from formulae,%: at <R Fpr= f²/R²•100,, Fop= ; at > R Fpr=(2f-R)/R * 100 Fop= ( -R)/R*100; at =R F=100%, where f is sample deflection upon applying tensile force, mm; R is spherical member radius, mm; is sample deflection upon relaxation in active medium, mm; F is formability of material, %. Method allows test conditions to approximate conditions of manufacture and usage of sewing articles. EFFECT: increased efficiency and wider range of sample characteristics. 4 dwg, 1 tbl, 1 ex