Dyeing pretreatment process for cotton and cheese or warp beam containing cotton fiber

Abstract

The invention provides a dyeing pretreatment process for cotton and cheese or warp beams containing cotton fiber, which is characterized by adopting the following steps: (1) treating the cheese or warp beams in a main cylinder by use of biological enzyme for 30 to 50 minutes at the temperature of between 40 and 55 DEG C, and bleaching the cheese or warp beams with oxygen for 30 to 50 minutes at the temperature of between 70 and 95 DEG C; (2) discharging water; (3) washing, discharging water again; and (4) performing enzyme treatment for removing hydrogen peroxide. As the process changes the prior pretreatment for the cotton and cheese or warp beams containing cotton fiber into biological enzyme treatment and oxygen bleaching and reduces the amount of caustic soda and hydrogen peroxide as auxiliaries, the process has the advantages that the maximum temperature of the process is 15 to 40 DEG C lower than of the temperature of the normal oxygen bleaching, the process reduces energy consumption, improves dye-uptake rate, reduces pollution on environment, allows pretreatment to be more friendly to environment, ensures that the whiteness and capillary effect after treatment are equivalent to that of the normal high-temperature pretreatment, improves the dye-uptake rate of cotton fiber, does not limit or affect dyeing process, does not need to replace equipment, has low energy consumption, and is simple to realize.

Description

technical field [0001] The invention provides a cotton and cotton fiber-containing cheese or warp beam dyeing pretreatment process, which belongs to the technical field of textile printing and dyeing. Background technique [0002] Cotton fabric is a natural cellulose fiber that is popular among consumers. However, in the dyeing industry, due to the competition of delivery time and cost, the treatment process before dyeing is farther and farther away from "green". At the same time, with the improvement of people's living standards, more and more attention is paid to the requirements of environmental protection. In the prior art, affected by the concept of "time-temperature equivalence", the treatment process temperature of cotton and cotton-containing fiber package before dyeing is getting higher and higher, and some have reached as high as 110 degrees or even above. The difference is large, the cylinder body heats the surrounding air to form a convection effect, the high te...

AI Technical Summary

Problems solved by technology

In the prior art, affected by the concept of "time-temperature equivalence", the treatment process temperature of cotton and cotton-containing fiber package before dyeing is getting higher and higher, and some have reached as high as 110 degrees or even above. The difference is large, the cylinder body heats the surrounding air to form a convection effect, the high temperature cylinder body is equivalent to a "heating air" for the surrounding environment, and the temperature pollution to the environment is increasing day by day; and because of this "heating air" effect, the cylinder body temperature The temperature difference between the cylinder body and the pre-treatment bath in the cylinder will cause heat exchange between the treatment bath and the cylinder body, and the temperature of the treatment bath will decrease. Cause energy waste to gradually increase

The higher the pretreatment temperature, the more obvious this effect is, which has a certain negative effect on environmental protection.

However, after pure biological enzyme treatment, the whiteness is too low, and there is a certain difference in the degree of uniformity of the pretreatment, and there is also a certain difference in the pretreatment of the normal capillary effect ratio, which basically cannot meet the requirements of varieties with a certain brightness and whiteness.