Fiber pervasion swelling agent and method for dyeing the same

Abstract

The invention discloses a fiber penetrating swelling agent which comprises the compositions in weight portion: 0.00016 to 0.0006 portion of laurocapram, 1 to 5 portions of N-methyl pyrrolidone, 5 to 10 portions of diacetone alcohol, 5 to 15 portions of ethyl salicylate, and 5 to 10 portions of isopropyl salicylate. The invention also discloses a method for dyeing by the fiber penetrating swelling agent, comprising the following steps that: a reducing agent and sodium hydrate are used for reducing the dye by a vatting method; the weight ratio of a reducing solution to the dye is 37.5: 0.8 to 2.0; a leveling agent and the fiber penetrating swelling agent are added to dye or a buffering agent is added to adjust the pH value and is dyed by vat acid, the temperature is reduced and the mixtureis washed; the mixture is subjected to oxidizing to develop color, fixing, reducing temperature and washing; the fresh water bath is performed, the fiber penetrating swelling agent is reduced and washed, and the temperature is reduced and the fiber penetrating swelling agent is produced. The fiber penetrating swelling agent ensures that the dye insoluble in water is effectively moistened and penetrated, and the fiber crystallizing area is effectively swelled to receive the dye; the fiber penetrating swelling agent ensures that a suspended solid is dyed evenly, has good homochromatism, improves the degree of dyeing, and solves the 'white core' problem of fiber.

Description

technical field [0001] The invention relates to the technical field of fiber treatment, especially the technical field of enhancing the permeable bulking property of fibers. Background technique [0002] Vat dyes have good color fastness, especially good color fastness to sunlight and soaping, but there are still some problems such as poor permeability, suspension dyeing color flower and unstable leuco body when dyed with leuco acid and leuco body. The problem is not resolved. [0003] The vat dye leuco dyeing method is to turn the insoluble vat dye into a water-soluble dye through alkali treatment, but at this time, the dyed sodium salt is no longer the original color, so it is called leuco, and the dye leuco is dyed The method is called leucosome staining. After dyeing, use the oxidation method to return to the original insoluble color development state. Leuco dyeing with traditional vat dyes, because the pH is around 12.0, will cause too much damage to the fiber, and i...

AI Technical Summary

Problems solved by technology

Some foreign related patents have made some improvements in solving the above problems, but there are certain problems: R.C.SHAH (Textile Chemist and Colorist, VOL4, N011, NOV7, 1972, P59-61) can delay the oxidation speed of hydrosulfite by adding protective colloid , thereby increasing the stability of vat dye leucosomes and leuco acids

However, due to the aggravation of polyester microfiber damage caused by high temperature, the strength of leather is reduced, and at the same time, the energy consumption in production is high. This means of improving color fastness by temperature is greatly limited.

[0009] Traditional penetrants such as pull open powder BX, Pingping plus O, and penetrant OPE phosphate are all hydrophilic, and they can neither make the water-insoluble solid dye particles effectively wet and penetrate, nor make the crystallization area of ​​the fiber Effective swelling to accept dyes; combined with hydrophilic dispersants including sodium lignin sulfonate, dispersant IW, dispersant N, dispersant MF, and dispersant CNF together with the above penetrating agents, it cannot achieve both Wet dye suspension particles and puffed fibers make the suspension dye uniform and have good color matching

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