Reactive dye cold pad-batch dyeing equipment and dyeing method

Abstract

The invention relates to the technical field of dyeing and provides reactive dye cold pad-batch dyeing equipment and a dyeing method. The dyeing equipment comprises a first dipping tank, a first padder, a ventilating device, a second dipping tank, a second padder and a rolling and piling device. The dyeing method comprises the following steps of primary padding, wherein fabric sequentially passes through the first dipping tank and the first padder, and the first dipping tank contains reactive dye and deoxygenation enzyme; ventilating treatment for 1-4 minutes; secondary padding, wherein the fabric sequentially passes through the second dipping tank and the second padder, and the second dipping tank contains alkaline agents; aftertreatment. According to the reactive dye cold pad-batch dyeing method, the reactive dye and the alkaline agents are padded in a separated mode, and the problems that because the reactive dye and the alkaline agents react before padding, diffusivity of the reactive dye is decreased, and dyeing is unstable are solved; the selection range of the reactive dye and the color fixing alkaline agents is enlarged, the requirement for the equipment is lowered, a proportioning pump is omitted, and operation is convenient.

Description

technical field [0001] The invention relates to the technical field of dyeing, in particular to a reactive dye cold pad-batch dyeing equipment and a dyeing method. Background technique [0002] The cold pad-batch process of reactive dyes has been widely used in printing and dyeing factories because of its high color fixing rate, low energy consumption, and small footprint. In the earliest cold pad-batch process, reactive dyes and alkali agents were mixed together as chemical materials, and then added to the dipping tank, and the fabric was dyed by padding the mixture of reactive dyes and alkali agents. Because reactive dyes and alkali agents are mixed together, and the time is relatively long, the selection of reactive dyes and color-fixing alkali agents is relatively limited, and reactive reactive dyes with strong alkali resistance are poor, resulting in difficult control of head-to-tail color difference. It can only dye some medium-light colors, reactive dyes with good al...

AI Technical Summary

Problems solved by technology

However, reactive dyes and alkali agents must be mixed and then padded onto the fabric, which cannot fundamentally eliminate the poor diffusivity and color instability of reactive dyes when they encounter alkali. The choice of reactive dyes and alkali agents is also limited to a certain range. Within the range, the cost is high, and the process control requirements are strict. For some special bright orange, bright yellow and bright blue, there are still poor penetration and diffusion, low utilization of reactive dyes, unstable shade, and poor dyeing depth. , cloth surface unevenness

At the same time, the fabric must be pre-treated before dyeing, because after the pre-treatment of the fabric, the dried cloth is piled up in the cloth car, resulting in inconsistent temperature on the cloth surface, which also affects the dyeing effect and is prone to color difference

[0004] Also, because in the actual production process, hydrogen peroxide will inevitably remain on the cloth surface after oxygen bleaching in the pre-treatment. Because of the residual hydrogen peroxide, it is easy to produce color difference and "white spots" on the cloth surface during cold batch dyeing, especially There is a greater chance of "white spots" and color shifts when dyeing lighter colored fabrics

In conventional cold pad-batch dyeing, because there is a strong alkali agent in the dyeing bath, the deoxygenase cannot be in the same bath with the alkali agent, so before dyeing, a deoxygenase deoxidation process must be added to ensure the stability of the shade and the uniformity of the cloth surface consistent, increased production costs

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