SU637092A3 - Method of finishing textile web - Google Patents

Description

(54) METHOD FOR FINISHING TEXTILE CLOTH

12

have a mixture of 1-3 carbon atoms, especially methanol. Changing the water content in the mixture, regulate the rate of combustion op.irt. For each type of fiber, it is possible to choose the composition of the mixture, which prevents the sheet from burning.

The solution OR dispersion of the finishing agent may contain various additives and excipients such as dispersants, emulsifiers, thickeners, and carriers, wetting agents, swelling agents, solvents, etc.

The amount of aliphatic alcohol depends on both the nature of the fiber and the nature of the finishing agent.

The temperature of application of the finishing agent does not practically affect the result.

processing. Typically, this step is carried out at 10-60 ° C, preferably at room temperature.

According to a particular variant of the method, for reasons of fire hazard, the temperature of the solution or dispersion of the finishing agent, as well as the cloth, is reduced to a temperature below the flash point of the water-aliphatic alcohol mixture on it. Depending on the speed of the equipment, it is sufficient to cool the web to a temperature that lowers the flash point of the mixture by 1–40 ° C, preferably 1–15 ° C.

The flash point of various mixtures of alcohol - water is given in the table (German industrial standard 51755)

After spawning of the section; on the 1st agent, the product is dried in the chamber, where the water – aliphatic alcohol vapor mixture is ignited due to the heat of combustion of the syringe. Ignition is carried out, for example, by a spark gap, open flame or other ignition element. For reasons of fire, use a mixture of water - aliphatic alcohol with a flash point above room temperature.

It is advisable to combine drying under the conditions according to the invention, T: e. Due to the heat of combustion of the alcohol, with the usual methods of drying, for example, using drying drums. It is also advisable to produce ignition in the vicinity of the preheater. When using drying drums, the fabric is heated by contact with an oil-heated bag, infrared or gas radiator, and in the case of perforated ba | ) Abanov - hot air. Additional heaters are used, for example, with an increased water content in the iacTBOpe or finishing process. The resulting water vapor can be attached to fix the finishing agent in subsequent stages after the DRYING of the web.

In order to fix the finishing agent, it is also possible to use the heat generated in the chamber, as well as the combustion of alcohol.

In the process according to the invention, the fiber does not damage and does not form substances that pollute the environment, but by changing the burning rate, adjust the residual moisture of the web In the required limits. The burning effect is observed in the chamber and it is observed, which saves from this process in a separate stage.

Example 1. 2 g of dye having the formula

about ,

KH-lCHab-CHj

dissolved in 1 liter of a mixture of 90 vol. % methanol II 10 About. % water. With this solution, a polyester or polyamide fiber fabric is plus at room temperature and then dried in a pot by burning the i; a fabric; 1 and spiot due to the calorific value of the heat of combustion. A uniformly dyed blue fabric is obtained. If perchlorethylene or methylene chloride is used as a solvent instead of this mixture, and the drying is carried out by methods known before, then a strong dye migration and uneven dyeing are observed. After drying, the dye is fixed in both cases by the usual method. Example 2. Polyester fiber fabric is plus a solution of an optical bleach-benzoxazole derivative in a mixture of 65 vol. % methanol and 35 vol. % WATER. The concentration of bleach in the solution is 25 g / l. After plating, the fabric is dried in the chamber by burning alcohol on it, and then heat treated at 200 ° C for 30 s. Get a good quality bleaching. Example 3. A dyed fabric from a mixture of 67% polyester fibers and 33% cotton. Plus a solution containing 80 g / l dispersion polyvinyl acetate. As a solvent, the solution contains a mixture of 60 vol. % methanol and 40 vol. % water . After drying in the combustion chamber, the sheet is calendered. , A drying resistant effect is obtained. Example 4. 5 g of the dye C. I. 18852 active yellow 17 is dissolved in 250 ml of water at 60 ° C. 3 g of the dye of the formula Q-K KHQ-K K-pa is dissolved in 750 ml of water. Both solutions are flown off and shaken, and Bg of soda is added to the solution to fix the active dye. With this solution, 67% of polyester fibers and 33% cotton are woven, and then dried in a combustion chamber. A uniformly dyed fabric is obtained. The dye is fixed by hot air at 190 ° C for 1 lin. In conclusion, the tissue is washed with water, with a 1 g / l aqueous solution of methyl acid fatty acid with a concentration of 1 g / l, washed at boiling for 10 min and washed first in water and then in methanol. PRI me R 5. Poplin fabric from a mixture of 70% polyester fiber with 30% cotton is vented in a double-hull bath bathed in cooling vein with a solution of 20 g / l of disperse blue dye 56 (C. I. Up to 63285) and 15 g /, dye active g ;; luso1 19 (C. I. L 61200) in a mixture of 30 vol. % ethanol from 70 sat. % of water at pH 5 and a temperature of 15 ° C. The degree of tissue aiding of the solution is 55 fs. % After plating, the fabric is iodized into the combustion chamber1 and, where, after adjusting the rate of movement of the fabric, the fabric is dried to a residual moisture content of 7%. In the case of dye fixation, blasting, and drying using conventional methods, a uniform blue color is obtained on the fabric. A similar result is observed when used in a positive solution instead of ethanol isopropanol. PRI me R 6. Fabric from a mixture of polyester and viscose fibers plus a solution of 25 g / l of optical bleach - a derivative of stilbene (in the form of a 30% aqueous dispersion) in a mixture, 30 vol. % methanol with 70 vol. % water at 12 ° C. The absorption of the solution with a cloth is 60 wt. % The silicified fabric is dried in a chamber by burning the methanol located on it. By adjusting the speed of the fabric, its residual moisture reaches 5%. The optical bleach was fixed on the fiber by dry heat treatment at 200 ° C for 30 s. Example 7. Cotton fabric plus a solution of 20 g, l. Dye active blue 19 (C.L Ho 61200) in omesi 40 vol. % methanol and 60 vol. % water. The absorption of the solution by the tissue is 70 wt. % The flash point of the mixture is 32 ° C, therefore, for the sake of safety, the fabric is cooled by cooling the solution by plus to a temperature of 20 ° C. After the fabric is fed into the combustion chamber, 1T is heated, followed by igniting a mixture of iars and drying the fabric with methanol for c-tetylity of combustion. Dye fixation and washing of the colorexidum are carried out using known methods. The result is a very uniform blue color on the fabric. TaKiK.i way, the proposed method allows to reduce the duration of the finishing process, reduce energy costs, improve the uniformity of the finishing agent and regulate the residual; 1 st moisture of the whole. Formula ii 3: 1; i 1. The method of finishing a textile canvas by applying a solution or dispersion agent in 30-90 vol. % lifaty alcohol. from 10-70 sat. % wob, squeezing and drying, about tl and h and KI 1Ts and th topics. -; th, with a shortening of time; npji reduction of energy costs, improving the uniformity of the ratio of the integral agent and ;; .. cr lpr01 ;; 111 and residual in,; effective iron, drying oc Hi; ecTi.Hi in the combustion chamber; Nahol Nugosl on olotne alcohol by tsnloty sigornnn. 2. Method 110 n. 1, characterized in that 3 as a finishing agent jic7 3. The method according to claims 1 and 2, which is also distinguished by the fact that, in order to reduce the risk of fire, before drying, the fabric is cooled to a temperature below the flash point of the mixture of alcohol and water on it. 8 Priority points: 25.03.72 lp 1 and 2. / a.09.72 l about p. The source of information taken into account during the examination: 1. US Patent No. 2274751, cl. 8-173, pub. 1972.