Viscose Textile Yarn Research Articles

New fibres prepared from cellulose-aqueous solution of sodium hydroxide systems (review)

The following basic conclusions were drawn from the published data examined; cellulose treated in steamblast conditions can form solutions and gelling pastes in an aqueous solution of sodium hydroxide; the solubility of cellulose in aqueous sodium hydroxide solution is primarily a function of the intramolecular bonds in the cellobiose unit with constant DP; intramolecular bonds are most efficiently broken in steamblast treatment in the cellobiose unit of cellulose I and cellulose III; monofilaments and yarns were obtained from solutions and gelling pastes of cellulose in aqueous sodium hydroxide solution; the physicomechanical properties of the monofilaments and yarns obtained from solutions and gelling pastes of cellulose in aqueous sodium hydroxide solution are still significantly lower than these indexes for viscose textile yarn.

Use of electrodialysis to desalinate wash water from the manufacture of viscose textile yarn

-- As a result of tests, the possibility of operating an electrodialysis unit under a regime of current reversal to desalinate wash water without preliminary purification from organic substances has been established.

Colorimetric evaluation of the structural uniformity of viscose textile yarns

Colorimetric evaluation of the structural uniformity of viscose textile yarns

Kinetics of dye sorption by viscose textile yarn

Viscose textile yarns which have been spun from viscoses of different ripeness indexes and have been dried at different temperatures have the smallest differences in dyeing after 8–12 min or 50–60 min after the start of the dyeing process.

Possibility of using acrylic compounds to finish viscose textile yarn

The possibility of using acrylic compounds to finish viscose yarn has been investigated. It has been shown that polybutyl methacrylate in an amount of 0.5–4% by wt., with addition of 0.1–0.8% paraffin, is effective.

Constructional features of machines for making man-made fibres from solutions

A series of machines has been developed for the manufacture of viscose textile yarn, viscose technical yarn, polyacrylonitrile fibre, and so on.

Some features of contact-convective drying of viscose yarn

Expenditures of heat in drying individual viscose textile yarns have been studied as a function of the construction of the device for condensated withdrawal from the type PNSh machines.

Spinning viscose textile yarn into a zinc-aluminum-containing precipitation bath under manufacturing conditions

Viscose textile yarn has been prepared by spinning in a zinc-aluminum-containing precipitation bath under manufacturing conditions. The yarn-spinning process in a zinc-aluminum-containing bath is stable, and is accompanied by an increased evolution of carbon disulfide and hydrogen sulfide. Viscose textile yarn spun in a zinc-aluminum-containing bath conforms to the All-Union State Standard and is characterized by a lower elongation and an increased swelling and shrinkage. Processes of warping and weaving the yarn have been carried out without any difficulties.

Procedure for evaluating operating viscose fibre manufacturing plants for their conformity to low-waste and waste-free technology

On the basis of calculations, waste-freeness coefficients have been obtained for target, actually realized, and attainable viscose fibre, viscose textile yarn, and cellulose film manufacturing operations. The waste-freeness coefficients of actually realized technological processes in operating manufacturing units are in the range from 0.279 to 0.497.

Spinning viscose textile into a precipitation bath containing zinc and aluminum

A viscose textile yarn was been prepared by spinning viscose into a zinc-aluminum-containing precipitation bath.

Promising technology in the preparation of viscose textile yarn

A technology for the preparation of viscose textile yarns has been described which makes it possible to automate the technological process, mechanize labor-intensive operations, increase labor productivity by 30–40%, increase take-up of product from a unit area by a factor of 1.5–2.0, reduce the energy-intensity of the process by 20%, and reduce the carbon disulfide concentration in the working zone to 1–3 mg/m3.

Sorption of water vapor by Siblon fibre

Water vapor sorption and desorption isotherms for Siblon high-modulus viscose fibre have been obtained at 20°C. It has been shown that Siblon has a higher absorptive power for water vapor as compared with other viscose fibres, textile yarn, and cotton cellulose.

Use of polymeric transporting cylinders for PNSh machines

The possibility of using polymeric transporting cylinders instead of the traditional rubber-coated ones has been investigated. The surface of the cylinders has a high hardness, and is resistant to the abrasive action of viscose textile yarn or knives for cutting off tow. The results of laboratory and manufacturing studies permit one to recommend polymeric transporting cylinders for equipping PNSh serially produced machines.

Expenditure of heat energy in drying viscose textile yarns

It has been found that the thermogravimetric analysis method is applicable for determining the expenditure of thermal energy in desorbing moisture from hydrocellulose textile fibres; it gives a quantitative evaluation of the fractional composition of the water sorbed by the yarns and of its bonding energy with the yarn matrix.

Brightening and sizing preparation for finishing viscose textile yarn

A brightening and sizing preparation has been developed which is based on a copolymer having a high content of acrylic ester units, prepared by a one-stage, high-temperature hydrolysis of an acrylonitrile copolymer in the presence of a mixture of water and an aliphatic alcohol.

Reducing water consumption in washing viscose textile yarn in packages

The effect of specific flow rate of soft water on the intensity and extent of wash-out of viscose textile yarn in packages has been studied. A process of washing yarn on OK-I machines with a reduced consumption of soft water — down to 60 m3 per metric ton of yarn — has been developed and carried out in manufacturing.

Effect of precipitation bath composition on the swelling of viscose textile yarn

The dependence of the degree of swelling of freshly spun viscose textile yarn (primary swelling) and of the finished yarn (secondary swelling) on precipitation bath composition has been investigated by the mathematical planning method, using a three-factor experiment.

Some features of manufacturing complex viscose textile yarn by the continuous method

Some features of manufacturing complex viscose textile yarn by the continuous method

Advisability of establishing norms for the specific electrical resistance of viscose textile yarns

It has been shown that the form of preparation and the amount of it on viscose yarn do not exert an important effect on its specific surface electrical resistance.

Viscose textile yarns from the continuous production method with improved consumer properties

Moisture transfer has been studied in viscose textile complex yarns having a linear density of 13.3 tex where the linear density of the elementary filaments was 0.13–0.75 tex, as compared with moisture transfer in cotton, natural silk, and polyamide yarns.