Results of research on factors intensifying hemp trust preparation processes

The object of the research is technological processes, plant material (stems of industrial hemp), factors that intensify the processes of preparation of the trust. The influence of the stem mass, preliminary destruction of their outer shell by flattening or beating, periodic moistening of the stems every other day on the time of the pulp preparation and the quality of the fibre was systematically investigated. It has been established that the shortest time for preparing the trust is 35 days for flattened and moistened stems every other day at a stacking density of 1 kg.mE−1. The noted term is 20% less than with a stacking density of 2 and 3 kg.mE−1, 5.7% less than for stems laid out on a film with and without moistening every other day at a stacking density of 1 kg.mE−1, 31% less than for stems spread on the film at a density of 2 kg.mE−1, and 42.9% less for ones spread at a density of 3 kg.mE−1, by 31.4% less than for stems spread out on the rettery with a density of 1 kg.mE−1, and by 42.8% at densities of 2 and 3 kg.mE−1, respectively. The stem colour indicator, determined with the device during the laying period, changed from the initial value of 45.2 lux for a density of 1 kg.mE−1, density of 2 kg.mE−1 — 45.4 lux, density of 3 kg.mE−1 — 45.7 lux, to values of 21.2 lux, 21.6 and 21.8 lux at the time of raising the trust, respectively. It was established that the produced long fibre corresponded to the 2nd — 3rd grade according to the content of shive (1.2–1.6%), by the content of tow (1.8–2.5%) – 3rd — 4th grade, by the content of hurd (6.5–10.5%) 3rd — 4th grade, respectively. According to the index of breaking load (16.6–25.1 daN), the obtained long fibre corresponded to the 3rd–4th grade. The index of linear density of the produced long fibre in all options for the preparation of hemp trust exceeded the maximum permissible value of 50 Tex, which, along with the complex indicators, made it possible to classify the fibre as non-standard.