Terylene grey fabric pretreating device

Abstract

The invention discloses a terylene grey fabric pretreating device, belonging to the technical field of dyeing machinery. The terylene grey fabric pretreating device sequentially comprises a fabric feed device, an alkali tank, a padder and a fabric discharge device, wherein the fabric feed device comprises a fabric tightener, high-position fabric guide rolls, a centering device and fabric guide rolls; the fabric tightener is installed at the front end of a front beam, and the tension of the fabric tightener is regulated by a regulating lever; the high-position fabric guide rolls are positioned at the back end of the cross beam, the cross beam is connected with the top end of a column, and the centering device is installed at the middle part of the column; the bottom of the alkali tank is provided with a plurality of immersion rolls, and the fabric guide rolls corresponding to the immersion rolls are installed above the alkali tank; the back part of the alkali tank is provided with the padder, and the padder comprises upper rolls and lower rolls; the back surface of the padder is provided with tension swing rolls for regulating the tension of the fabric; the fabric discharge device comprises a swing arm, a fabric roller and a cylinder; one end of the swing arm is hinged on the frame, and the other end of the swing arm is provided with the fabric roller; the cylinder body is hinged on the frame; and the top end of a piston rod of the cylinder is hinged below the middle part of the swing arm.

Description

technical field [0001] The invention relates to a pretreatment device for polyester gray cloth, which belongs to polyester dyeing pretreatment equipment. Background technique [0002] The commonly used size for weaving polyester fabric is polyacrylate, which is an acrylate copolymer size. Before polyester is dyed, it must be desizing and scouring. The main purpose of the desizing and refining process is to remove the oil agent added during fiber manufacturing and the size added during weaving. In order to improve the air permeability and moisture absorption of polyester fabrics, it is necessary to carry out alkali weight reduction treatment on polyester fabrics. After alkali weight reduction treatment on polyester fabrics, the fibers will be hydrolyzed and thinned, the gaps between fibers and yarns will increase, and the air permeability will increase. , and the hydrophilicity of the fiber surface has also been improved. [0003] The desizing and alkali reduction of polye...

AI Technical Summary

Problems solved by technology

As the cloth reacts while advancing in the alkali tank, the alkali is constantly consumed, and the oligomers and monomers of various molecular weights falling off the cloth surface continue to enter the alkali solution, so that the alkali concentration cannot be kept at a certain value. , resulting in unstable product quality

After the alkali reduction is completed, because there is a high concentration of lye on the cloth surface, it must be washed with a large amount of water for many times. On the one hand, a large amount of alkali is wasted; Its washing effect is still not satisfactory

This process is not only long and complicated, but also consumes a lot of water, electricity, and steam. In addition, the chain runs in the concentrated alkali tank all the year round, resulting in a high failure rate of equipment, etc.

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