SU1386679A1 - Method of producing rayon fibre - Google Patents

Description

(21) 4064436 / 23-05;

(22) 04/29/86

(46) 04/07/88. Vu. № 13 (71) Belarusian Institute of Technology. S.M.Kirov

(72) I.F.Alexandrovich, A.N.Murashkevich, G.V.Orlova, M.A.Titov, V.V.Pechkobsky and T.I.Soiko

(53) 677.463.021 (088.8)

(56) Author's testimony of the USSR

 1249075, cl. 0 01 F 2/08, 1985.

Viscose fiber production. Technological regulations If 3500-80. Mogilev plant of artificial fibers, V.V. Kuibyshev, Mogilev, 1980.

(54) METHOD FOR OBTAINING VISCOSE FIBER

(57) The invention relates to the manufacture of chemical fibers, in particular to a method of finishing viscose tow. The invention makes it possible to reduce the sulfur content of the fiber and increase the process economics due to the fact that viscose fiber is obtained by molding viscose into a sedimentation bath followed by plasticization stretching, restoring the newly formed tow and finishing it, including desulfurization 0.25-0. , 55% sodium metasilicate solution, 1 tab.

with

00

0: a 1: D

one

The invention relates to the production of chemical fibers, in particular to a method of finishing a viscose tow.

The purpose of the invention is to reduce the sulfur content of the fiber and increase the efficiency of the process.

EXAMPLE 1. Viscose, containing 8.2% i - cellulose, is 6.3% NaOH, its viscosity is 45 s, matured 20 cm in 1 N N. C1, is molded into a precipitation bath containing 13.4% (145 g / l)

 1.5% (15 g / l) ZnSQ} ,, beats the weight 1.3 g / cm. Formed harness No. 1800 with a nominal linear density of elemental fiber of 0.56 tex is drawn in a plasticizing bath, and carbon disulfide is distilled off from the apparatus at a water temperature of 92 ° C.

The fiber finishing is carried out in the following sequence:

washed with circulating water at

13

25

washed with fresh dried water at 57 ° C;

treated with a solution of sodium metasilicate with a concentration of 0.55% at, treatment time 30 s;

wash the fiber from sodium metasilicate with softened water first at 50 ° Cf and then fresh with softened water at 57 C.

This is followed by the handling of the harness with the HBC 21 concentrate-

3Q

6679 2

days 1.5% at 50 ° C. Drying of the finished fiber is carried out in a belt dryer at 125 ° C.

Sulfur content and physico-mechanical parameters are determined in the finished tow. Consumption of desulfurization is controlled by changing the concentration in the finishing solution.

Q Examples 2-6. The conditions for obtaining a tow are similar to Example 1, the difference is in the concentration of sodium metasilicate solutions at the desulfurization stage. In the example

5 6 desulfurization of viscose harness is carried out by a known method with a 1.0% solution of NaOH.

The table shows a comparative analysis of the known and proposed

20 ways to obtain viscose fiber in tow.

Claims (1)

Invention Formula The method of obtaining viscose fiber by molding the viscose into a precipitation bath followed by plasticization stretching, restoring the freshly formed tow, and finishing it, including desulfurization, characterized in that desulfurization is carried out to reduce the sulfur content of the fiber and increase the efficiency of the process. , 25-0,55% solution of sodium metasilicate.