RU2001982C1 - Method for production of fibre - Google Patents

Description

100 x 40 mm in size were soaked for 2-3 s in a solution of zinc chloride with a density of 1.92 g / cm and rolled onto each other with a rubber roller with a force of about 2 kg. After keeping the samples at room temperature for 1 hour, they were washed. Each fiber sample was subsequently washed in 100 ml of solution. Each portion of the wash solution changed after 10-20 minutes. Washing was considered complete if the zinc content in the wash water remained constant after 1 hour of exposure to the solution. The zinc content in the solution was determined by the trilonometry method after preliminary precipitation of alkali zinc hydroxide and subsequent dissolution of the precipitate in hydrochloric acid. A wash solution was prepared by introducing into the water a complexing agent, for example Trilon B or thiourea.

The experimental results are presented in table.2.

From table 2 it follows that when using distilled water, the time for complete washing of the fiber samples is 180

min, and when using a 0.06% solution of Trilon B (disodium salt of ethylenediaminetetraacetic acid) - only 80 min. Thus, the washing speed increases by more than 2 times.

Table 3 presents the test results of the tensile strength samples. The tests were carried out after the samples were completely washed and dried at a temperature of 60 ° C.

Thus, the invention can significantly accelerate the washing process by preventing the precipitation of hydroxide in the pores of the fibers with a slight increase in the strength of the fibers.

(56) Axelrod G.Z. Study of the physicomechanical phenomena of the process of the interaction of cellulose with zinc chloride solutions under conditions of fiber production. Thesis for the competition. scientist, degree of candidate of technical sciences L: VNIIB, 1968.

UK patent No. 260374, 1925.

Table 1 Effect of dilution of a 10 M zinc chloride solution on precipitation

table 2

The dependence of the washing time of the fiber samples on the composition of the washing solution

Table 3 The effect of the composition of the washing solution on the tensile strength of the fiber samples

FORMULA AND SECTION

Claims (3)

1. A METHOD FOR PRODUCING FIBER, comprising treating the paper with a solution of zinc chloride, followed by washing it with water, characterized in that a complexing agent is additionally introduced into the water during the washing of the fiber. 2. The method according to claim 1. characterized in that Continuation of the table. 2 that disodium salt of ethylene diamintetraacetic acid in the amount of May 0, is used as a complexing agent. % 3. The method according to claim 1, characterized in that thiourea in an amount of 2 wt.% Is used as complexing agent.