Comparison of methods for assessing the technological quality of flax fiber products

Abstract

The paper presents the results of a comparative analysis of technological quality assessment of flax fiber by the main features: the yield and number of long and short fiber, the content and total fiber yield, determined by different methods of regulatory documentation. The research took place in 2001–2021 in the flax–growing regions of Russia: Tver, Smolensk, Vologda, Kostroma regions. It is established that the information value of the obtained results depends on the chosen evaluation method. The absolute deviations of the average level of the values of the signs determined by various methods are 3.55 - 9.05% for the output of a long fiber, its numbers are 0.00 - 1.64 N, the output of a short fiber is 0.20 - 11.60%, its numbers are 0.40 - 2.75 N, the content and total fiber output are 0.40–10,8%; relative deviations are for the same signs, respectively equal, 24,0–44,5%, 0,00– 13,60%, 1,80–51,60,%, 1,30–44,40%, 1,00–32,00%. The given example shows a possible variation in the assessment of the integral technological quality of flax (from number 1.25 to number 2.00) and the cost of the products produced from it (long and short fiber) (19%), subject to determination by the following two options. The first option provided for the determination of the output of a long fiber on a laboratory ribboner CMT-200M, the numbers of a long fiber - according to the change N4 GOST 10330–76, the output of a short fiber according to the method of technological evaluation of the quality of flax on the ribboner TL-40, the numbers of a short fiber according to GOST 9394- 76. The second option was to find the output of long and short fibers in production conditions on a ribboner, organoleptic evaluation of the number of the long fiber and determination of the number of the short fiber by calculation. It is concluded that it is necessary to bring the level of values of these signs determined by various methods to a single level in order to increase the informational value of assessing the technological quality of flax raw materials.