A kind of vat dye suspension wet short steam pad dyeing process

Abstract

The invention discloses a vat dye suspension wet shortened steaming pad dyeing technology. The technology includes the following steps of 1, dye liquor padding, wherein fabric to be dyed is padded in vat dye suspension dye liquor, dipping and padding are carried out twice respectively, and the vat dye suspension dye liquor is prepared from 0.1-5% of superfine powder vat dye (oxf), 1-20 g / L of a reductant, 1-3 g / L of a penetrant, 1-3 g / L of a dispersant and 5-30 g / L of an accelerant; 2, alkali liquor padding, wherein the fabric to be dyed is directly padded in alkali liquor, dipping and padding are carried out once respectively, and the alkali liquor is prepared from 5-30 g / L of caustic soda and 0-10 g / L of sodium hydrosulfite; 3, steam reduction, wherein saturated steam is adopted for rapid steaming; 4, oxidation, wherein hydrogen peroxide is adopted for oxidation. According to the vat dye suspension wet shortened steaming pad dyeing technology, the level dyeing property and color fastness of the dyeing technology are significantly improved; besides, the technology is simple and saves energy.

Description

technical field [0001] The invention relates to the technical field of vat dyeing, in particular to a vat dye suspension 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 general fluid exhaust dyeing method is used to dye cotton and linen fabrics with vat dyes, it cannot meet this requirement at all, and the level dyeing and color fastness of the exhaust dyeing process are poor, so its application has been limited. [0003] In the prior art, cotton and linen fabrics are usually dyed by means of vat dye suspension pad dyeing, which is carried out by padding vat dye suspension dye solution, drying, padding and steaming the reducing solution...

AI Technical Summary

Problems solved by technology

However, due to its high requirements, if the general fluid exhaust dyeing method is used to dye cotton and linen fabrics with vat dyes, it cannot meet this requirement at all, and the level dyeing and color fastness of the exhaust dyeing process are poor, so its application has been limited.

[0003] In the prior art, cotton and linen fabrics are usually dyed by means of vat dye suspension pad dyeing, which is carried out by padding vat dye suspension dye solution, drying, padding and steaming the reducing solution, and then oxidative soaping and drying. The 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 color difference of the front and back, which is unacceptable to customers

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