Method for cooking of cotton fabrics

FIELD: textile industry, in particular, cotton fabric cooking technology used in textile material dyeing process.

SUBSTANCE: method involves dividing fabric cooking reservoir of material washing machine, wherein fabric is impregnated, into two chambers by means of partition featuring properties of fine filter for water; introducing electrodes into said chambers; filling with water, said chamber with negative electrode, which is defined as cathode chamber, being filled with water containing (mg/l): sodium nitrate 3-5; sodium bisulfate 2-3; surfactant 1-2; charging the same cathode chamber with edible salt in an amount of 30-60 g/l; directing running water through chamber incorporating positive electrode; supplying electrodes with electric potential difference of 5-35 V; charging fabric into cathode chamber; impregnating fabric with cooking solution of indicated composition; squeezing fabric to moisture content of 100-110%; boiling in boiling cooking apparatus under saturated steam atmosphere at temperature of 100-105 C during 1 hour; washing with hot and cold water in material washing machine.

EFFECT: reduced expenses for cotton fabric cooking process, and improved safety conditions during fabric cooking process.

1 dwg

 

The invention relates to textile production, namely, to methods of otwarcie cotton fabrics in the dyeing process of textile materials.

Known methods of otwarcie under pressure (swelling) of cotton fabrics pre-impregnated and extract them in an alkaline cooking solutions, degumming with sodium hydroxide (8-18 g/l caustic soda dry or sodium hydroxide solution, beats. weight of 1.01-1,02) under a pressure of 1.5-3 ATM, at a temperature of 110-130°C. [see Bernard Century Practice of bleaching and dyeing of textile materials. - "Light industry", 1971, - s-152]

The disadvantage of this way of analog is the lack of efficiency of the process, a great time operations, the high cost of the production process, high degree of risk due to the use of elevated pressures and elevated temperatures otwarcie.

The closest technical solution to the same destination to the claimed method according to the essential features and the maximum achievable effect and therefore adopted for the prototype is the way otwarte cotton fabrics, including impregnation of the fabric in a bath of material-washing machine cooking solution containing (g/l): sodium hydroxide 20-30, sodium silicate 3-5, sodium bisulfate 2-3, hall 1-2, squeezing the fabric to a moisture content of 100-110%, the evaporation in suparna cooking apparatus in the atmosphere n Semenovo steam at a temperature of 100-105° C for 1 hour followed by rinsing with hot and cold water in the material-washing machine [see Balashov SO, Bulusheva N.E., Novoradovskaya T.S., garden SF Short course of chemical technology of fibrous materials. - M: Light and food industry. 1984, - p.29-33].

The disadvantage of the prototype method is the complexity and high cost of the production process, high degree of risk due to the necessity of working with concentrated caustic soda.

The technical result is to simplify and cheapen the process otwarte cotton fabric, improvement of conditions of safety.

This technical result in the implementation of the invention is achieved in that the capacity of the material and washing machines, in which the impregnated fabric, divided into two chambers by a partition having properties filter, water purification, cells enter electrodes, pour water, and into the chamber with the negative electrode, called the cathode chamber, pour water, containing (g/l): sodium silicate 3-5, sodium bisulfate 2-3, hall 1-2, the same cathode load table salt in the amount of 30-60 g/l, through the camera with a positive electrode, called the anode chamber, miss flowing water is fed to the electrodes, the electric potential difference value 5-35, download fabric cathode ka is ERU capacity, impregnate the fabric of the cooking water, then wring out the fabric to a moisture content of 100-110%, zaparivajut in suparna cooking apparatus in an atmosphere of saturated water vapor at a temperature of 100-105°C for 1 hour, washed with hot and cold water in the material and washing machine.

The invention is illustrated in the drawing.

Bath 1 material and washing machines are divided into two chambers by a partition 2, with the properties of the fine filter water in both chambers are electrodes 3, the camera 4 with the electrode with a negative potential, called the cathode chamber, is intended for introduction into it of an aqueous solution containing (g/l): sodium silicate 3-5, sodium bisulfate 2-3, hall 1-2, salt 30-60, for impregnation of the fabric of the cooking solution, the chamber 5 containing the electrode with a positive potential, is designed for running water, the device 6 is loaded into the tub and unloaded from bath tissue, device 7 wring out the cloth, through the wires 8 and 9 is applied to the electrodes constant time difference of electric potentials size 5-35 Century

Specified in the formula limits the values of the processing parameters selected for the following reasons. The lower limit of the amount loaded to the cathode of salt 30 g/l is necessary and sufficient for impregnation of fabrics cooking solution when applying to elect the odes of constant time difference of electric potentials 35, the upper limit of 60 g/l is necessary and sufficient when applying to the electrodes 5 Century

Example. Bath 1 material-washing machines, of polyethylene wall thickness of 15 mm is divided into two chambers when the ratio of their volumes of 1:20 by a partition 2 from a sheet of polyethylene with a thickness of 5 mm, having the properties of the fine filter water in the form of through holes with a diameter of 0.5 mm with a step of 5 mm in both cameras along the opposite wall is injected flat graphite electrodes 3, and the chamber of larger volume 4 to the negative electrode, called the cathode chamber, pour water, containing (g/l): sodium silicate 4, bisulfate, sodium 2,5, a surfactant, 1.5, the same cathode load table salt in the amount of 45 g/l, through the chamber 5 with the positive electrode, called the anode chamber, pass running water, served on the electrodes, the electric potential difference value of 20 V, load cotton fabric from severe fiber to the cathode of the bath fixture 6, impregnate the fabric of the cooking solution, wring out the fabric to a moisture content of 105% device 7, zaparivajut in suparna cooking apparatus in an atmosphere of saturated water vapor at a temperature of 100-105°C for 1 hour, washed with hot and cold water in the material and washing machine.

The advantage of the proposed method compared with the method about what otipo is the lack of transactions for delivery to the place of production of caustic soda, store it in a special storage, transshipment through alkali-resistant alkali pipelines, valves, dispenser in the bath material and washing machine for impregnating a cotton fabric cooking solution.

Using the proposed method allows to simplify, reduce costs, make more secure way to otwarte cotton fabrics due to refusal of delivery to the place of production of concentrated caustic soda, use of tanks for storage of concentrated caustic soda, pipelines, valves, metering device for introducing caustic soda in the bath material and washing machine.

How otwarte cotton fabrics, including impregnation of the fabric in a bath of material-washing machine cooking solution containing, g/l: sodium silicate 3-5, sodium bisulfate 2-3, hall 1-2, squeezing the fabric to a moisture content of 100-110%, the evaporation in suparna cooking apparatus in an atmosphere of saturated water vapor at a temperature of 100-105°within hours, flushing hot and cold water in the material-washing machine, characterized in that the capacity of the material-washing machine, in which the impregnated fabric, divided into two chambers by a partition having properties filter water in cells injected electrodes, pour water, and into the chamber with the negative electrode, called the Yu cathode chamber, fill in water containing sodium silicate, sodium bisulfite, surfactants of the above concentrations, the same cathode load table salt in the amount of 30-60 g/l, through the camera with a positive electrode miss running water, served on the electrodes, the electric potential difference 5-35 In, load the fabric to the cathode, impregnate the fabric of the cooking solution.



 

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