Cold bleaching device for open-width knitted fabrics

Abstract

The invention discloses a cold bleaching device for open-width knitted fabrics, which comprises a frame, a cloth feeding device and a immersion / padding liquid device, and further comprises a wet supported cloth conveying device, a rollup device and a control circuit. The cloth feeding device, the immersion / padding liquid device and the wet supported cloth conveying device are all provided with mechanical open-width components, and the open-width knitted fabrics are subject to open-width flattening before entering the units described above; the immersion / padding liquid device and the wet supported cloth conveying device are the devices capable of forming, during the use thereof, supported conveyance for wet fabrics; during the use, the control circuit controls the rotating speed of electric motors in an active manner so that the cloth feeding device, the immersion / padding liquid device, the wet supported cloth conveying device and the rollup device realize the conveyance of the open-width knitted fabrics under bearable tension in a manner of synchronous operation, the open-width knitted fabrics are free from crumpling and curling in the entire treatment process, and can also be flatly rolled onto a cloth roller in the form of big batch which can be rotated, thus the fabrics, after being immersed in cold-bleaching liquid, can be completely piled up under movable state, thereby ensuring the consistent effect of cold batch oxygen bleaching.

Description

technical field [0001] The invention relates to a fabric dyeing pretreatment device, in particular to a cold bleaching device for open-width flat knitted fabrics. Background technique [0002] When dyeing medium and light-colored cotton knitted fabrics, in order to obtain a good dyeing effect, the cotton knitted fabrics must be pretreated before dyeing. Bleaching in the pretreatment is essential, because the bleaching agent used The main components are hydrogen peroxide and caustic soda, so bleaching is also called "oxygen bleaching". The purpose of oxygen bleaching is to bleach the impurities in the fiber and the stains caused by spinning and weaving, so that the dyeing effect of the subsequent process is better. [0003] For cotton knitted fabrics, when carrying out oxygen bleaching treatment, make the mixture formed by hydrogen peroxide and caustic soda flow into the liquid flow dyeing machine as the oxygen bleaching liquid, keep the temperature of the oxygen bleaching li...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent document CN1786320A discloses a cold pad-batch pretreatment process for cotton knitted fabrics, but the equipment used in this process is basically similar to the cold-batch oxygen bleaching equipment for woven fabrics. For open-width knitted fabrics, if the open-width knitted fabric is oxygen bleached with this equipment, it will wrinkle and curl during operation, resulting in inconsistent oxygen bleaching and a large number of crepes in the subsequent dyeing and side difference

This kind of stacking method will cause the oxygen bleaching liquid to seep from the top to the bottom and accumulate at the bottom of the cloth stacking car. During the stacking process, it will form an up-dry and down-moist form, which will produce inconsistent oxygen bleaching effects from top to bottom. Now cold stacking 5 hours, and then cooking for more than 10 minutes, which not only increases the consumption of water, steam and electricity, but also loses the meaning of cold stack oxygen bleaching

Otherwise, it will inevitably affect the dyeing quality of the subsequent process and cause defective cloth

In addition, the fabric is in a state of disorderly folding and stacking in the cloth car. After a long time, or affected by other factors, it will form wrinkles again, and oxygen bleaching must be redone.

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