A Short Wet Steam Pad Dyeing Process of Cotton Fabric Vat Dyes

Abstract

The invention discloses a shortened wet steaming pad-dyeing technology of an all-cotton fabric vat dye. The technology comprises the following steps: 1, padding with the dye: padding an all-cotton fabric with the dye according to a bath ratio of 1:5-10 at 20-40DEG C to make the pickup be 85-95%; 2, adding an assistant: feeding the assistant by using a high-level liquid adding device to make the assistant pickup on the all-cotton fabric be 90-100%; 3, rapidly steaming: rapidly steaming by using saturated steam, wherein the temperature of a steaming box is 90-110DEG C, the humidity of the steaming box is 99-100%, and the steaming time is 1.5-2min; 4, carrying out high-temperature water washing; 5, carrying out oxidation treatment; and 6, soaping. The shortened wet steaming pad-dyeing technology of the all-cotton fabric vat dye has the advantages of good level dyeing property, high color fastness, simple process, environmental protection and healthiness.

Description

technical field [0001] The invention relates to the technical field of printing and dyeing, in particular to a short wet steam pad dyeing process of vat dyes for cotton fabrics. 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, the vat dyeing of cotton fabrics by general fluid exhaust dyeing cannot meet this requirement at all. [0003] This is because, on the one hand, the vat dye itself is insoluble or slightly soluble in water, and the synthesized vat dye particles are relatively large, which cannot be directly used in the printing and dyeing industry. Even after grinding, the dye particles are dispersed, but because the dye particles have Therefore, even if a certain dispersi...

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Problems solved by technology

However, due to its high requirements, the vat dyeing of cotton fabrics by general fluid exhaust dyeing cannot meet this requirement at all.

[0003] This is because, on the one hand, the vat dye itself is insoluble or slightly soluble in water, and the synthesized vat dye particles are relatively large, which cannot be directly used in the printing and dyeing industry. Even after grinding, the dye particles are dispersed, but because the dye particles have The tendency to re-aggregate, so even if a certain dispersion effect is formed, due to the poor stability of the dye dispersion, the level dyeing and color fastness of the vat dye exhaust dyeing process are also poor

On the other hand, in the prior art, cotton and linen fabrics are dyed by "conventional vat dye suspension padding". Customers also cannot accept

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