Printing And Dyeing Process Of Cotton Fabric

The pretreatment process of printing and dyeing includes desizing, scouring and bleaching for three steps, desizing, boiling and mixing, and rebleaching for two steps. Desizing, boiling and bleaching are one step.

The three step method and the two step process are long, and water, steam and personnel are much used, which is very unsuitable for the current clean production.

In the one-step process, due to the lack of research and development in the early stage auxiliaries, the poor stability of the auxiliaries, the poor batch quality, the unstable quality of the fabric pretreatment, and the poor quality of the semi-finished products, aiming at these problems, the printing and dyeing customers and auxiliaries have optimized the technological formula, technological process and equipment flow through a series of technological screening and equipment simplification.

It solves the problem of poor repeatability of the semi-finished products in the pretreatment of cotton fabric. The production speed is 85 m / min, and the semi finished products are more than 10cm/30 minutes, and the whiteness is more than >80.

Therefore, the equipment process first solved the desizing and hot water washing after removing the piled piled heap, removed most of the dyestuffs and debris, rapidly cooled down, and was suitable for room temperature leaching of one step method of liquid material; multiple dip and multi rolling, and the application of the high feed liquid device to make the one-step method of liquid permeating through the core quickly and soaking through the core to the liquid machine (the newest type) features: the end plate was made of 3mm stainless steel plate, and was machined by laser cutting and NC shearing plate edge folding.

A two roller horizontal rolling structure is adopted. The cylinder is used on both sides. The pressure can be adjusted individually, and the pre impregnating groove is arranged. The fabric enters the preimpregnated tank to impregnate first, so that under the action of vacuum negative pressure and swelling and suction, the liquid can enter the inner part of the fiber and realize the immersion.

The low pressure on the upper rolling point is favorable for the liquid on the surface and enters the steamer.

The multi dip and multi rolling infusion is fully porous.

Multi dip two rolling, achieve the fiber vacuum and liquid delivery, and the liquid volume can be adjusted according to the fabric, up to l20%.

It is equipped with circulating filter self-cleaning system (dynamic filter box), indirect heating and temperature automatic control.

The high feed liquid system is equipped with a uniform working fluid application system. It can automatically control the amount of five kinds of chemical AIDS through PLC, and is equipped with an imported electric induction flowmeter and a pneumatic regulating valve.

Features: soaked core, uniform liquid belt.

Large volume.

Advanced steaming design: high production efficiency, quick exchange of lotion and high utilization rate of lotion.

Design of cleaning and cleaning mechanism: on the combined machine, the cleaning mechanism is adopted, only the last one is added to the water, the large flow is smooth and strong spray, and the fabric is exchanged with the lotion, and the pulp and floating color of the fabric fully expanded are removed quickly.

Dynamic filter box with brush roller, filter drum, slag discharge bucket, box, pmission system, circulation booster pump and so on. After filtering drum, filtrate the fiber and flocculation paste in the lotion, then brush the roller into the slag discharge bucket by the brush roller, separate the tank from outside, separate from the washing liquid, ensure that the cleaning liquid is clean, and avoid two stains.

The use of lotion greatly improves the utilization rate of water. The washing cycle reduces heating and saves steam.

Rotary waste hot water heat recovery device: the device can heat the waste heat discharged from the waste water after washing (the temperature of the discharged hot washing liquid is generally 60~90 degrees Celsius), and exchange water with the newly washed water to increase the temperature from the water temperature to 50~72 degrees Celsius. Because the labyrinth liquid heat progressive heat exchange mechanism and the centrifugal water film surface heat exchange advanced heat exchange mechanism, the surface area of cold water and hot water has large contact, and the heat exchange is very sufficient, and the exchange efficiency is as high as 90%.

One of the advantages is that the steam used for washing and heating is reduced, and steam is very obvious to avoid scaling and dirt deposition.

The cost of investment is high, and the cost of investment is recovered in two months.

According to the varieties of fabrics, the enhanced technology prescription and various high efficiency auxiliaries are used to control the reaction rate of alkali oxygen and one bath. The temperature, time, speed and dosage of chemical agents are formulated and adjusted.