KR20120132740A - One bath dyeing method of complex fabric with polyester-cotton - Google Patents

Abstract

PURPOSE: 1 bath dyeing method for polyester thread with inorganic material and cotton of mixed fabric is provided to develop a dyeing process of polyester thread with functional inorganic material and a cotton of mixed fabric from the previous 2 bath dyeing process, thereby reducing the dyeing waste water and energy. CONSTITUTION: The dyeing method for polyester thread with inorganic material and cotton of mixed fabric comprises steps of dyeing by using reactive dyes and disperse dyes on polyester thread with inorganic material and cotton of mixed fabric, and after dyeing polyester thread at 120~130°C under the condition of mixture of dyes and acetate, dye cotton fabric at 50~65°C of cooling condition.

Description

One bath dyeing method of complex fabric with polyester-cotton}

In the present invention, when dyeing a blended fabric made by blending a polyester yarn and a cotton yarn mixed with functional inorganic particles, due to the difference in dyeability, two-dye dyeing is usually performed to increase the dyeing process as well as to match colors. Because it is difficult, it relates to a dyeing method that can proceed dyeing in one bath rather than two baths.

Cotton Fiber By using the advantages of existing polyester fibers and functionalities, they can be less wrinkled and have a cotton feel as well as dyeing cotton after polyester dyeing. There were inconveniences of dyeing twice, and dyeing wastewater and dyeing process were contaminated by different yarns due to the generation of dye wastewater and dyeing process during two-bath dyeing.

The dyeing of polyester yarn proceeds dyeing at high temperature and high pressure, and the holding time at high temperature affects the dyeing amount. After dyeing at high temperature, it is cooled and then cotton dyeing at 60 ° C. Cotton dyeing is performed at normal pressure and the input time and order of dyeing aid are important dyeing factors.

When dyeing polyester yarns containing functional minerals at high temperature and high pressure, the dyeing characteristics of the disperse dyes are changed by the functional inorganics. The deep color is expressed by the site where the functional inorganics are dropped, and a small amount of dye can express a desired color. It is more effective at producing muddy and dark colors than bright and light colors.

In addition, since the functional inorganic material is mixed and spun into a polyester yarn, it affects the crystallinity of the polyester, which increases crystallinity, which may cause a decrease in the amount of dyeing during dyeing due to the reduction of the amorphous region. Therefore, it is necessary to appropriately control the reduction of color depth and dyeing amount at high temperature and high pressure dyeing of polyester yarn containing functional inorganic materials.

When dyeing a blend of functional yarns containing functional inorganic polyester yarns and ordinary cotton yarns in one bath, it is necessary to increase the reactivity so that there are no unreacted dispersion dyes so that the dispersion dyes are not transferred to the cotton yarns. The dyeing temperature and holding time may be important factors in order not to cause dye transfer of the reaction dye. Therefore, when dyeing the blended fabric of functional polyester yarn and cotton yarn, it is necessary to establish the process according to the proper dyeing temperature and time.

The present invention for solving such a conventional problem is to develop an energy-saving dyeing process in which dyeing energy is saved by developing a one-bath dyeing process of functional polyester yarn and cotton yarn.

The present invention for achieving the above object, in the method of dyeing a blended polyester yarn and cotton yarn mixed with inorganic materials using a reactive dye and disperse dye, 120 to 130 in the state mixed with acetic acid in the dye It is to provide a one-bath dyeing method of a mixture of polyester yarn and cotton yarn mixed with inorganic yarns, characterized in that dyeing the first yarn yarn at a temperature of ℃ and then dyeing cotton yarn in the state of cooling to 50 ~ 65 ℃ The purpose.

Hereinafter, one bath dyeing method of the blended polyester yarn and cotton yarn mixed with the inorganic material of the present invention will be described in detail.

1 bath dyeing method of blended polyester yarn and cotton yarn mixed with inorganic material of the present invention First, the polyester yarn was dyed at a temperature of 120-130 ° C. in a state in which acetic acid was mixed and then cooled to 50-65 ° C. It is made by dyeing cotton yarn in the state.

That is, first dyeing the polyester yarn contained in the blended fabric and then dyeing cotton yarn.

After disperse dyes, reaction dyes, dyeing aids and acetic acid are added, the polyester yarn is first dyed at a temperature of 120 ~ 130 ℃.

At this time, acetic acid is preferably used 2% to improve the dyeing amount of polyester and cotton yarn.

If the dyeing temperature is less than 120 ℃, there is a problem that the dyeing is not good because there is not enough intermolecular voids in the amorphous region of the polyester, and if the dyeing temperature is higher than 130 ℃, the crystallization of the polyester by the functional inorganic proceeds to lower the dyeing amount rather There is a problem.

Next, the cotton yarn is dyed in the state which cooled the temperature to 50-65 degreeC. If the temperature is less than 50 ℃, there is a problem that the salt is generated due to partial unreacted reaction of the reaction dye and the cellulose fiber, and if the temperature is higher than 65 ℃, the dye does not bond with the cellulose molecules in the fixing process after dyeing There is.

One bath dyeing method of the blended polyester yarn and cotton yarn blended inorganic material of the present invention is a dyeing process capable of dyeing the blended fabric of the functional yarn mixed polyester yarn and cotton yarn in two baths in one bath Developing the process has the effect of reducing the dyeing waste water and energy.

Hereinafter, the one-bath dyeing method of the blended polyester yarn and the cotton yarn mixed with the inorganic material of the present invention will be described in detail by way of examples, the scope of the present invention is not limited to the following examples.

EXAMPLES 1-6

In order to examine the dyeing ratio of the polyester in the blended yarn of the TiO ₂ mixed polyester yarn and cotton yarn during the first bath dyeing, dyeing was performed under the conditions shown in Table 1 below.

Dye at 130 ℃ Dyeing rate (%)
Amount of dye (owf) % Of acetic acid Example 1
One
One 92 Example 2 2 94 Example 3 3 95 Example 4
1.5 One 91 Example 5 2 92 Example 6 3 94

As shown in Table 1, in the example of the polyester dyeing process at the first high temperature and high pressure during one bath dyeing, the dyeing amount did not change as the amount of dye increased, and the amount of acetic acid increased and the pH was increased. It can be seen that the lower the amount of dyeing increases.

[Examples 7 to 12]

In order to examine the dyeing rate of the cotton yarn in the blended yarn of the TiO ₂ mixed polyester yarn and the cotton yarn which proceeds first during one bath dyeing, dyeing was performed under the conditions shown in Table 2 below.

Dye at 60 ℃ Dyeing rate (%)
Amount of dye (owf) % Of acetic acid Example 7
One
One 85 Example 8 2 87 Example 9 3 86 Example 10
1.5 One 84 Example 11 2 88 Example 12 3 87

As shown in Table 2, in the example of the cotton yarn dyeing process performed at a second pressure during one bath dyeing, the dyeing amount increased as the amount of dye increased, but the pH increased as the amount of alkali increased. It can be seen that it does not increase proportionally.

Claims (1)

In the method of dyeing a mixture of polyester yarn and cotton yarn mixed with inorganic materials using reactive dyes and disperse dyes, first dyeing the polyester yarn at a temperature of 120 ~ 130 ℃ in the state mixed with acetic acid A one-bath dyeing method of a blended fabric of a polyester yarn and a cotton yarn mixed with an inorganic material, characterized by dyeing cotton yarn in a state of cooling to 50 to 65 ° C.