METHOD OF DETERMINATION OF SHARE OF IMPURITIES IN TEXTILE MATERIALS Russian patent published in 1994 - IPC

FIELD: textile industry. SUBSTANCE: method of determination of share of impurities in textile material lies in its cutting into measured sections of equal length, in formation of sample, in its screening through sieve with preset sizes of meshes and in finding of initial share of impurities in initial sample. Length l of measured section of material and size of meshes α are interrelated by relation 2<l/α<60 and size of meshes is determined from relation 1<αn_f<3, where n_f is maximum thickness of fibre of investigated material, mm. For determination of shares of different impurities, for instance dirt and fibre flaws, additional sample of same mass is formed from measured sections of material. Fibre fraction in it is crushed, it is passed through sieve to separation of fibre fraction and dirt impurities. Share П_d of dirt impurities is found and share of fibre flaws is computed by formula П_fe, where П_fe= П-П_d is share of impurities in initial sample. EFFECT: enhanced accuracy of determination of share of impurities. 2 cl, 2 tbl