SU806796A1 - Method of anticrease treatment of textile cloth - Google Patents

Description

one

The invention relates to a method for crushing textile fabrics, such as denim, and can be used in the finishing industry in the textile industry.

There is a method of permanent decoration of textile fabric by convective heat supply to the front and back sides of the fabric I.

However, in a known manner, the intensity of the finishing process is low. The method is particularly inefficient in the case of finishing textile fabrics such as denim, which is associated with the features of the structure of this type

tissues.

The purpose of the invention is to improve the quality of denim finish with convective heat supply.

The goal is achieved by the fact that the reverse side of the fabric is additionally heated by cyclic contact of the fabric with a heated surface with a surface with a duration of each cycle of 0.2-1.0 s with a interval between cycles of 2-10 s, and the temperature of the heated surface is 5-10 ° C below the temperature of destruction tissue. In addition, the number of cycles of tissue contact with the surface area is 10–20.

Claims (2)

Depending on the geometric characteristics of the tension rollers, the dimensions of the heat chamber and the speed of movement of the textile fabric, the processing parameters are set within the specified limits, and the duration of one contact cycle on the wrong side of the fabric with the heating surface is 0-1.0 s, and the interval between cycles of 2-10 s. A decrease in the contact time below the specified limit impairs the quality indicators due to the fact that a significant percentage of the applied resin does not have time to polymerize. The implementation of a single contact for a time exceeding 1 s leads to the overheating of the fabric, burning it and, consequently, to a sharp decrease in the strength characteristics. Heating the tissue side of the fabric at temperatures below the temperature at which the fabric is destroyed, allows for intensified heating of the fabric in depth and, as a result, intensifies the polymerization process of the resin. However, increasing the temperature of the heated surfaces to a value less than the difference in degrading from the temperature of destruction of the fabric leads to the burning of the surface and a sharp decrease in the strength of the characteristics of the textile fabric. Lowering the temperature of the heated surfaces that come into contact with the wrong side of the fabric, to a value of more than 10 ° C different from the destruction of the fabric, reduces the efficiency of the proposed method and leads to the need to increase the heat treatment time of the textile fabric. Example 1. A textile cloth, such as denim, is fed to a heat chamber at a speed of 15 m / min. At the same time, the 10 upper tension rollers of the chamber are heated to a temperature lower than the temperature of destruction of the fabric. Heated to the air is fed into the chamber with the speed of the incident flow of 1 m / s. With the passage of the upper rollers, the fabric on the wrong side covers the heated surface of the roller, as a result of which heat is supplied to the wrong side of the fabric - by the contact and convection method. The duration of the contact of the web with one roller is 1 s, the interval during which heat is supplied to the seamy side of the fabric by convection only, 10 s. The heat supply to the front side of the fabric is thus carried out only by convection. Example 2, Denim fabric served in a heat chamber at a speed of 30 m / min. At the same time, the 15 upper tension rollers of the chamber are heated to a temperature lower than the temperature of destruction of the fabric. Heated to 20 (fC air is fed into the chamber with an incidental flow velocity of 1 m / s. The movement of the fabric along the rollers is carried out. Similarly to example I, the duration of the contact of the web with the surface of one roller is 0.6 s, and the interval during which heat is supplied to the k side of the fabric only by convection, 6 s Heat is supplied to the front side of the fabric only by convection. Example 3. Denim fabric is fed into the heat chamber at a speed of 60 m / min. At the same time, 20 upper tension rollers chambers are heated to The heated air is fed into the chamber with a flow velocity of 1 m / s. The tissue is moved along the rollers as in Example 1, the duration of the contact of the web with the surface of one roller is 0.2 s, and the interval during which heat is supplied to the seamy side of the fabric only by convection, 2 s. Heat is supplied to the front side of the fabric only by convection. Thus, the proposed method of the non-crushable finishing of a textile fabric allows to intensify the process due to additional heating of the fabric, as well as to improve its strength characteristics. Claim 1. The method of indelible finishing textile fabric, by convective heat to the front and back sides of the fabric, characterized in that, in order to intensify the process and improve the quality of denim when convective heat supply, the wrong side of the fabric is additionally heated by cyclic contact of the fabric with a heated surface with a duration of each cycle of 0.2 - 1.0 s and with an interval between cycles of 2-10 s, moreover, the temperature of the heated surface is 5 - lower than the temperature tissue destruction .. 2. A method according to claim 1, characterized in that the number of cycles of contact of the fabric with the heated surface is 10 to 20. Sources of information,. taken into account during the examination 1. USSR author's certificate 9351, CL. D 06 C 7/04, 1929.