Combined dyeing process

Abstract

The present invention provides a combined dyeing method that includes: a scouring process (S12) of scouring a dyeing target material which is chemically dyed with a chemical dye to remove impurities remaining in the dyeing target material; an eco-friendly dyeing process (S13) of dyeing the dyeing target material with an natural dye; a mordanting process (S14) of adding a mordant to the dyeing target material to fix the natural dye to the dyeing target material; a cleaning process (S15) of removing the mordant remaining in the dyeing target material; and a drying process (S16) of drying the dyeing target material.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Application No. 10-2014-0030158, filed on Mar. 14, 2014, with the Korean Intellectual Property Office, the disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a combined dyeing method, and more particularly, to a combined dyeing method that reduces side effects of a conventional chemical dyeing method and also overcomes shortcomings of a conventional eco-friendly dyeing method.[0004]2. Description of the Related Art[0005]A conventional chemical dyeing method is a method for extracting dyes having various properties and colors from a petroleum compound through artificial processes and dyeing clothes, and is carried out through ① a desizing process, ② a scouring process, ③ a bleaching process, ④ a dyeing process, {circle around (5)} a cleaning process, and ⑥ a drying process.[0006]The desizing pro...

AI Technical Summary

Benefits of technology

The present invention provides a combined dyeing method that combines the benefits of chemical dyeing and eco-friendly dyeing methods. This method reduces the side effects of chemical dyeing and also improves the shortcomings of eco-friendly dyeing methods. By first using the chemical dyeing method to achieve desired colors and fastness, and then using the eco-friendly dyeing method to remove toxins and express natural colors, the resulting dyeing effect is better. This method also avoids excessive expense by only requiring a single eco-friendly dyeing method.

Problems solved by technology

The chemical dye is prepared by adding toxic chemicals to a petroleum compound (benzene) or the like, and, thus, toxic substances are discharged during a process for producing the chemical dye.

These dyes are water-soluble, and, thus, they are likely to come out of the fiber if washed and likely to be discolored by the sun.

A vat dye such as indigo or indanthrene and a sulfide dye are not dissolved in water and thus cannot be used as dyes as they are.

Since most synthetic fibers are hydrophobic, it is difficult to dye the synthetic fibers with water-soluble dyes.

However, this chemical dyeing method causes environmental pollution since various toxic substances are added during production of dyes and during a dyeing process.

In particular, while fiber is dyed with chemical dyes, various toxic auxiliaries for dyeing are added, and, thus, environmental pollutants are discharged.

Further, when the dyed fiber is neutralized and washed, a lot of water is used.

The water used at this time contains environmental pollutants such as toxic substances, and, thus, a lot of waste water is generated.

Further, recently, in the case of dyeing fabric so as to be expressed in various colors and vivid colors, the chemical dyeing method is carried out several times, resulting in worsening of environmental pollution and waste of water.

Furthermore, in the case of blue jeans chemically dyed with indigo, arylamine which is a toxic compound has been detected from some blue jeans.

Therefore, if the chemical dyeing method is carried out several times to blue jeans to be dyed with indigo in order to achieve various colors, a washing effect, or vivid colors, a user may be exposed more times to such a toxic compound.

However, such a eco-friendly dyeing method is relatively high in production cost as compared with the chemical dyeing method, and is not adequate for expression of various colors.

Further, in the eco-friendly dyeing method, brightness and chroma is low as compared with the chemical dyeing method, and the eco-friendly dyeing method is not adequate for mass production.

Furthermore, in the eco-friendly dyeing method, fastness is low and a dye transfer rate is high.

Also, in the case of dyeing blue jeans by means of the eco-friendly dyeing method with natural indigo, it is a bit difficult to achieve various colors, a washing effect, or vivid colors.

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