Estimation of Quality Indicators of Ecological Thermoplastic Fiber Materials

2020 Acta Montanistica Slovaca  
The article discusses the process of obtaining fibrous material from a thermoplastic by blowing methods, and also provides a method for calculating the average diameter d f and length l f of elementary fibers. According to the presented calculations, the average elementary fibers' diameter value d f depends on the airflow speed from the blow head in the fiber formation zone. The greater the air velocity V р , the smaller the diameter of the elementary fibers. The elementary fibers' length lf
more » ... ibers' length lf depends on their diameter d f and variable angle γ of the blowing head diffuser. The smaller the diameter of the elementary fibers d f and the larger the variable angle γ, the smaller the length of the elementary fibers. At γ = 0 degrees, the fiber is obtained, with an increase in the angle γ, the fiber length becomes fixed. The average elementary fibers' diameter d f varies depending on the speed of the airflow flowing from the blowing head in the fiber formation zone. The greater the air velocity V р , the smaller the diameter of the elementary fibers. The discrepancy between the calculating results of the average fiber diameter with their real values does not exceed 13%, which, according to the process complexity, can be considered satisfactory. The elementary fibers' length lf depends on the elementary fibers' diameter d f and a variable angle γ. The smaller the diameter of the elementary fibers d f and the larger the variable angle γ, the smaller the length of the elementary fibers. At γ = 0 deg, the infinite length fiber is obtained, and with an increase in the angle γ, the fiber length becomes fixed. Keywords recycled thermoplastic raw materials; vertical and horizontal method of blowing a melting jet; fiber formation; methodology for calculating the average diameter and length of elementary fibers.
doi:10.46544/ams.v25i1.2 fatcat:xmust7i3gfho7ir53jppfn2roe