Consumer properties of hemp fiber different stalk collection periods

Purpose. Determination of consumer characteristics of hemp fibers obtained from the bast after harvesting green straw stems and mature stems to obtain seeds. Methodology. The studies used standard methods outlined in existing regulatory documents. The length of the fibers and their percentage distribution, tex, linear density were determined according to DSTU ISO 6989: 2005 “Textile fibers” and DSTU ISO 5084: 2004 “Determination of thickness of textile materials”. Findings. It was found that the fibers extracted after deep processing of the bast obtained from the stalks of straw after full ripeness for seeds have a high linear density of 3.2-5.6 tex, which is suitable only for the manufacture of coarse twisted products, container fabrics and burlap. The price of such fibers in the world market is 8600 UAH / t. The fiber obtained after deep processing of the bast extracted from the stalks of green straw is sufficiently thin 0.7-0.8 tex, which corresponds to the linear density of cotonin. Such fiber can be used for the manufacture of products for various purposes: fabrics, sewing clothes, clothes, shoes, pulp, paper. Hemp kotonizirovanny fiber is a valuable cellulose-compatible raw material, the price of such fiber on the world market is 28500 UAH / t. Originality. For the first time, the consumer characteristics of hemp fiber extracted from the bast, which is obtained from hemp stems of different times of collecting green stems and seeds after full maturity of the stems, were determined. The practical value. The conducted experimental studies will make it possible to determine the timing of harvesting hemp stems to obtain fibers for one purpose or another, depending on the availability of manufacturers' demand for finished hemp products and goods for various purposes

technical hemp; harvest time; fiber; linear density of bast; green stems