Wet short steaming pad dyeing process adopting vat dye microcapsules

Abstract

The invention discloses a wet short steaming pad dyeing process adopting vat dye microcapsules. The wet short steaming pad dyeing process comprises procedures as follows: S1, padding and rolling in a dyeing : to-be-dyed fabric is padded in the dyeing for double padding and double rolling, and the dyeing is prepared from 0.1%-10% (owf) of the vat dye microcapsules, 1-20 g / L of thiourea dioxide, 1-3 g / L of a pH buffering agent, 1-3 g / L of a penetrant and 5-30 g / L of an accelerator; S2, padding and rolling in an alkaline : the to-be-dyed fabric obtained through treatment in S1 is directly padded and rolled in the alkaline for single padding and single rolling, and the alkaline is prepared from 5-30 g / L of caustic soda and 0-10 g of sodium dithionite; S3, reduction and steaming: saturated steam is used for rapid steaming; S4, oxidization: hydrogen peroxide is adopted for oxidation. By means of the wet short steaming pad dyeing process adopting the vat dye microcapsules, the level dyeing property and the color fastness are remarkably improved, the process is simple and energy is saved.

Description

technical field [0001] The invention relates to the technical field of vat dyeing, in particular to a vat dye microcapsule wet short steam pad dyeing process. Background technique [0002] Due to its excellent color fastness to rinsing and light, vat dyeing has always been the favorite of people for dyeing cotton products. At present, the demand for cotton and linen fabrics dyed with vat dyes is gradually increasing in the international printing and dyeing market. However, due to its high requirements, if the vat dyes of cotton and linen fabrics are dyed by general fluid dip dyeing, this requirement cannot be met at all. The color fastness is poor, and its application has been limited. [0003] In the prior art, cotton and linen fabrics are usually dyed by padding with vat dye suspension, which is carried out by padding vat dye suspension dye solution, drying, padding and steaming the reducing solution, and then oxidative soaping and drying. Such a process not only needs t...

AI Technical Summary

Problems solved by technology

At present, the demand for cotton and linen fabrics dyed with vat dyes is gradually increasing in the international printing and dyeing market. However, due to its high requirements, if the vat dyes of cotton and linen fabrics are dyed by general fluid dip dyeing, this requirement cannot be met at all. Poor color fastness, its application has been limited

[0003] In the prior art, cotton and linen fabrics are usually dyed by padding with vat dye suspension, which is carried out by padding vat dye suspension dye solution, drying, padding and steaming the reducing solution, and then oxidative soaping and drying. Such a process not only needs to waste a lot of energy, but also in the drying process of the primer, due to the migration of the dye to the upper part of the pile, it is difficult to adjust the color difference between the left, middle and right sides and the front and back sides, which is unacceptable to customers.

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