Method for desizing of cotton fabrics and apparatus for performing the same

FIELD: textile industry, in particular, cotton fabric desizing process and equipment.

SUBSTANCE: method involves dividing bath adapted for desizing of cotton fabrics into two chambers by means of partition featuring the properties of fine filter for water; introducing electrodes into both of said chambers and filling bath with water; introducing into bath chamber of larger size incorporating positive electrode and used as anode chamber sulfites in an amount of 3-15 g/l, powder of amphoteric aluminosilicates: montmorillonite, beidellite, nontronite, kaolinite, halloysite, talc in an amount of 1-30 g/l, each component being introduced individually or in random mixture thereof; charging cotton fabrics into bath; supplying constant potential difference of 5-35 V to electrodes; impregnating and holding fabric in anode part of bath at temperature of 30-40 C during 0.5-5 hours; washing fabrics with cold water; discharging fabrics from bath and squeezing.

EFFECT: simplified construction and reduced production costs, increased efficiency, and improved safety during operation of apparatus.

3 cl, 1 dwg

 

The invention relates to the textile industry, and in particular to methods and devices rasshifrovka cotton fabrics.

Known methods of rasshifrovka cotton fabrics, which consists in the fact that the fabric is impregnated with the bath water solution of sulfuric acid concentration of 2-3 g/l, soak the cloth in the bath in an aqueous acid solution at a temperature of 30-40°C for 2-24 hours, washed with cold water and wring out [see Balashov SO, Bulusheva N.E., Novoradovskaya T.S., garden SF Short course of chemical technology of fibrous materials. - M: Light and food industries, 1984. - p.26-27].

The disadvantage of these methods analogous is the lack of efficiency of the process rasshifrovka, relatively large, up to 24 hours, time rasshifrovka and because of the high cost of the process rasshifrovka cotton fabrics.

Known devices for rasshifrovka cotton fabrics, including bath of an aqueous solution of acid, water heater acid solution contained in the bath, the delivery system into the tub and output tissues of the bath harness or rasprave, the dewatering fabric devices [see Balashov SO, Bulusheva N.E., Novoradovskaya T.S., garden SF Short course of chemical technology of fibrous materials. - M: Light and food industries, 1984. - p.26-29].

A disadvantage of the known device is the STV-analogues is the lack of efficiency of their work, a relatively large time required to complete rasshifrovka cotton fabrics, and because of the high cost of the process rasshifrovka.

The closest technical solution to the same destination to the claimed method according to the essential features and achieved the greatest positive effect, and therefore the selected prototype is way pre-treatment of water supplied to rasshifrovka, the magnetic field [see Davidson M.I. electromagnetic treatment of water systems in the textile industry. - M.: Legprombytizdat, 1988, p.87-89].

The method includes magiceye flowing through the dielectric to the water pipeline, filling the bath with water, the introduction into it of concentrated sulfuric acid in a quantity sufficient to obtain a concentration of 2-3 g/l, treatment and restraint of cotton fabrics in the tub with aqueous acid solution at a temperature of 30-40°C for 1-12 hours, rinse with cold water and wring out the cloth.

The disadvantage of this method is a relatively long processing time fabric due to the weak intensity of the process rasshifrovka cotton fabrics, the high cost of this manufacturing operation, increased hazard to operating personnel when working with concentrated sulfuric acid: its delivery to the place of production, storage, what relevam through stainless steel piping, valves, dispenser in the bath, upon dilution of the concentrated acid in water to a lower concentration.

The closest technical solution of the same purposes of the claimed device according to the totality of symptoms and the achieved maximum positive effect, and therefore the selected prototype is a device for rasshifrovka tissues, including the bath for impregnation and extracts of cotton fabrics in a solution of sulfuric acid, an electromagnet that generates a constant magnetic field, the dielectric aqueduct crossing the magnetic lines of force, which serves minicinema water, a device for the dosed introduction of minichannel water sulfuric acid bath acid solution and soaking in her tissues, valves for I / o from a bath of the acid solution, water heater solution in the bath, device for submission to the tub, the conclusion from the bath tissue harness or rasprave, the dewatering fabric devices [see Davidson M.I. electromagnetic treatment of water systems in the textile industry. - M.: Legprombytizdat, 1988. - p.87-89].

The disadvantages of the known devices of the prototype are: complexity, bulkiness, large dimensions of the device design, the relatively low efficiency and a longer duration of time of the process rasshifrovka and therefore high when aImost installation and process rasshifrovka, increased risk during operation of the device in connection with the need for vessels, piping, valves for entering into a bath of sulphuric acid dosing to enter acids in minichannel water.

A single effect of a group of inventions is to simplify the design, reduce the size of the device, increasing the efficiency and reducing the time process rasshifrovka, cheapening the construction of the device and its operation, increasing the degree of safety in its operation.

Specified single technical result in the implementation of the present invention, the method is achieved by the fact that the water fill the tub to rasshifrovka tissue bath is divided into two chambers by a partition having the properties of the fine filter water, is introduced into both chambers of the electrodes in the camera baths with a positive electrode, called the anode chamber, introducing salt of sulfuric acid in the amount of 3-15 g/l, powder amphoteric silicates: montmorillonite, beidellite, nontronite, kaolinite (anoxia), Gallo of Asita, talc in the amount of 1-30 g/l, individually or in arbitrary mixtures thereof, serves on the electrodes a constant electric potential difference value 5-35, download cotton fabric in the anode chamber, soak the fabric in an aqueous solution of sulfuric acid at a temperature of 30-40°C for 0.5 to 5 hours, the item is washed with cold water, press, unload the fabric from the bath.

Specified single technical result in the implementation of the invention, a device is achieved in that the device consists of a bath to rasshifrovka cotton fabrics, divided into two parts by a partition having the properties of the fine filter water; electrodes in both parts of the baths, and the baths with the electrode under positive potential, which is the anode chamber baths, designed for impregnation of the fabric and holding it in sulfuric acid solution, the second part baths electrode under negative potential, which is the cathode chamber, is intended to fill it with water; dosing for introduction into the water of the bath salts of sulfuric acid in the amount of 3-15 g/l; metering device for maintaining the water bath powder amphoteric silicates: montmorillonite, kaolinite (anoxia), halloysite, beidellite, nontronite, talc, pyrophyllite in the amount of 1-30 g/l, one or an arbitrary mixture thereof; devices for feeding the fabric in a bath, taking it out of the tub harness or rasprava; the dewatering fabric devices.

The invention is illustrated in the drawing.

The device for implementing the method consists of bath 1 to rasshifrovka cotton fabrics, divided by a partition 2, with the properties of the fine filter water,electrodes 3 and 4 in both chambers, the anode part 5 baths, cathode part 6 baths, dispenser 7 for the introduction of salts of sulfuric acid, of a metering device 8 for the introduction of powder amphoteric silicates, fixtures 9 to enter into the bath, the conclusion from the bath tissue, fixture 10 for pressing fabric, wires 11 for supplying voltages to the electrodes.

Specified in the formula limits the values of the processing parameters selected for the following reasons. Salts of sulfuric acid in the range of 3-15 g/l enough of them formed in the anode part of a bath-electrolysis of a sulfuric acid concentration of 2-3 g/l, are necessary and sufficient for optimal rasshifrovka tissue. The minimum amount of powder amphoteric binder 1 g/l is necessary and sufficient for rasshifrovka tissue at the maximum voltage across the electrodes 35 and maximum exposure time of the fabric in the bath-the electrolyzer 5 hours. Accordingly, the maximum number specified powder 30 g/l is necessary and sufficient for rasshifrovka fabric with a minimum voltage on the electrodes 5 and the minimum time of exposure of the fabric in the bath-cell 0.5 hour.

Example. Plastic tub 1 for rasshifrovka divided into two chambers in the volume ratio 1:15 partition 2 - polyethylene sheet with a thickness of 0.003 m with through holes with a diameter of 0.0005 m with a step of 0.005 m injected into the chambers 5 and 6 GRAFITO the s electrodes 3 and 4, severe cotton fabric in rasprava using feeder and output 9 is injected into the chamber 5 of a larger volume of the positive electrode, called the anode chamber, filled with water bath until complete coverage of its fabric, is introduced into the water chamber 5 dispenser 7 copper sulfate in the amount of 15 g/l, is introduced into the water chamber 5 dispenser 8 montmorillonite powder in an amount of 10 g/l, serves on the electrodes 3 and 4, an electric potential difference of 15 V At the positive bias potential on the electrode in the chamber 5 with the tissue, the temperature maintained within the range of 30-35°With, soak the fabric for 2.5 hours, cut off voltage, pour the acid solution, washed cloth with cold water, discharged from the bath device 9, the press device 10.

When reaching the same result on the prototype method using the device of the prototype must be delivered to the premises with the installation of concentrated sulfuric acid, store it in a special acid-resistant vessel, sent by acid-resistant pipelines through acid-proof valve in the tank for rasshifrovka, emancipate water bulky electromagnet, to use a special heater for heating water in the tub, to process rasshifrovka harsh cotton fabric for five hours, because the intensity of p is ocess rasshifrovka in this case is two times slower.

Using the proposed method and device for its implementation allows you to:

1) significantly reduce the size of the device;

2) to simplify the process and design elimination of complicated devices by magnicidio water, replacing the function of the electric field applied to the electrodes directly into the tub to rasshifrovka fabric, a waiver of the need to deliver to the place of production of concentrated sulfuric acid to keep it in a specialized store, to have the piping, valves for entering into a bath of concentrated sulphuric acid, the dispenser to enter the acid into the water, remove heater aqueous solution of the acid in the bath (the water in the tub is heated by heat by passing current through the electrolyzer);

3) significantly reduce the cost of installation and process rasshifrovka;

4) increase the efficiency and reduce the time rasshifrovka;

5) to increase the safety of operation of the device by replacement of storage tanks for sulfuric acid storage tanks, salts of sulfuric acid, removing pipelines, valves for entering into a bath of sulphuric acid dosing to enter the acid into the water.

1. How rasshifrovka cotton fabrics, including filling water bath to rasshifrovka, loading cotton the tissue paper into the bath, impregnation and restraint fabrics in an aqueous solution of sulfuric acid concentration of 2-3 g/l at a temperature of 30-40°, rinse with cold water, discharging the tissues of the bath, centrifuge, characterized in that the bath is divided into two chambers by a partition from a material having properties of fine filter water, is introduced into both chambers of the bath electrodes in the camera baths larger the positive electrode, called the anode chamber, introducing salt of sulfuric acid in the amount of 315 g/l, powder amphoteric silicates: montmorillonite, beidellite, nontronite, kaolinite, halloysite, talc in the amount of 1-30 g/l, individually or in arbitrary mixtures thereof, serves on the electrodes of the cell constant electric potential difference value 5-35 In, soak the cloth in the anode side of the bath for 0.5-5 hours

2. The device for implementing the method of rasshifrovka cotton fabrics, comprising a tank for rasshifrovka cotton fabrics, the device for feeding in a bath o bath tissue harness or width, a device for pressing fabrics, characterized in that the bath is divided into two parts by a partition having properties filter, water purification, in both parts of the bath containing the electrodes, and part baths electrode under positive potential, which is the anode camera the bath, designed for impregnation of the fabric and holding it in the acid solution, the second part baths electrode under negative bias potential, which is the cathode chamber, is intended to fill it with water dispenser in water baths salts of sulfuric acid, a metering device for introducing into the water bath powder amphoteric binder.



 

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