CN103993490B - A kind of terylene basic dyeing one auxiliary agent and application thereof - Google Patents

Abstract

The invention belongs to the field of light chemical engineering, and in particular relates to an auxiliary agent for dyeing polyester fibers. The invention provides a special auxiliary agent suitable for alkaline dyeing of polyester disperse dyes, which can adapt to alkaline dye bath dyeing, omit the reduction cleaning process, and even cooperate with the one-bath process of desizing, refining and dyeing, and finally dye the fabric evenly. It has good dyeability and soft hand feeling, and at the same time, it can avoid the reduction of color fastness caused by carrier dyeing.

Description

A kind of basic dyeing auxiliary agent for polyester and its application

technical field

The invention belongs to the field of light chemical engineering, and in particular relates to an auxiliary agent for dyeing polyester fibers.

Background technique

The dyeing process of polyester fiber with disperse dyes has always been in weak acidic medium, and the pH is generally controlled at 4.5-6, which is mainly considered from the stability of dyes and fibers. However, the pretreatment processes of polyester fabrics such as desizing, relaxation, alkali weight reduction, and polyester microfiber fabric opening are all carried out under alkaline conditions. Before dyeing, they must be fully washed and acid neutralized to remove the fabric. residual alkali. After the dyeing is completed, it is necessary to carry out post-treatments such as reduction cleaning and soaping in an alkaline medium. With the development of dyeing technology and technology, people are increasingly pursuing fast and energy-saving dyeing technology. Since the 1980s, people have studied the alkaline dyeing of polyester fabrics, and it is still a research hotspot.

NaOH is rarely used as an alkaline agent in basic dyeing of disperse dyes. This is because NaOH is a strong base that can be completely ionized in aqueous solution. OH- is a strong nucleophile that is easy to attack the dyes with low electronegativity atoms, the structure of the dye is destroyed. Some commonly used inorganic weak bases are used as alkaline agents, such as Na ₂ CO ₃ , Na ₃ PO ₄ , NaBO ₃ ·4H ₂ O, etc., such as patent CN103243581A, patent CN1208097A. Now research has found that some disperse dyes have better resistance to strong alkali, which can meet the alkaline conditions dyeing with sodium hydroxide as the medium, and realize the one-step processing technology of desizing and dyeing polyester fibers. Some buffer solutions play a certain role in protecting the dye in polyester alkaline dyeing, such as sodium hydroxide-amino acid buffer solution, sodium hydroxide-borax buffer solution, etc. However, this alkaline dyeing solution contains impurities such as oligomers, dyes, dispersants, shavings, etc., which are very prone to uneven dyeing, and even the dyes will agglomerate. However, some auxiliaries have poor heat and alkali stability, are unstable in this alkaline dyeing environment, and are prone to denaturation. The article "Research on Basic Dyeing and Leveling Agents for Polyester Superfine Fibers" (Advances in Textile Science and Technology, No. 2, 2013) also proposed a carrier-based alkaline leveling agent based on o-phenylphenol, but this leveling agent It will change the dyeing performance of polyester, decrease the color fastness to staining, and decrease the color fastness to rubbing.

Contents of the invention

The purpose of the present invention is to provide a kind of special auxiliary agent suitable for basic dyeing of polyester disperse dyes, and the specific technical scheme is:

All-in-one auxiliaries for polyester alkaline dyeing, the components of which are calculated by weight percentage:

The preparation method of the above polyester basic dyeing integrated auxiliary agent is conventional stirring, mixing the components according to the weight percentage, and stirring evenly.

The present invention also provides an application of the above-mentioned polyester alkaline dyeing integrated auxiliary agent in the dyeing process, specifically:

The all-in-one auxiliaries for polyester alkaline dyeing are added after the polyester is pre-treated and washed, and there is no need to adjust the pH value. When used, it can be put into the dyeing bath together or successively with alkali-resistant disperse dyes. The specific dyeing formula is: the bath ratio is 1:15-50 (mass ratio of fabric to dye liquor), and alkali-resistant disperse dyes are relative to the fabric ( That is, 0.1-10% of the weight of owf), the concentration of the basic dyeing integrated auxiliary agent in the dyeing solution is 2-5g·L ^-1 .

The beneficial effects of the present invention are:

Some alkaline dyeing auxiliaries currently available on the market can keep the initial pH of the dye bath at 8.5-10.5, and the polyester alkaline dyeing agent provided by the invention can keep the dye bath at a relatively stable alkaline pH: maintain the pH of the dye solution In the small range between 9.2-9.4, the pH value of the dyeing solution can still be stable at a dyeing temperature of 130°C to obtain a good dyeing effect and hand feeling;

The polyester alkaline dyeing all-in-one agent provided by the invention can adapt to alkaline dyeing bath dyeing, omit the reduction cleaning process, and even cooperate with the process of desizing, refining and dyeing in one bath, and the final dyed fabric has good level dyeing property, soft hand feeling, and Avoid the reduction of color fastness caused by carrier dyeing;

The polyester alkaline dyeing all-in-one agent of the present invention can dye polyester fibers under alkaline conditions, effectively reduce the influence of oligomers, have no deviation in color light after dyeing, improve the dyeing fastness, and at the same time, the hand feeling of polyester fibers is softer , In factory production, the washing process before dyeing can be reduced and the cost can be reduced.

Instructions attached

Fig. 1 is the flowchart of the dyeing process in the embodiment 5 of the present invention.

detailed description

Embodiment 1 (basic dyeing agent 1)

Each component is calculated as:

Embodiment 2 (basic dyeing agent 2)

Each component is calculated as:

Embodiment 3 (basic dyeing agent 3)

Each component is calculated as:

Embodiment 4 (basic dyeing agent 4)

Each component is calculated as:

Example 5

Select alkali-resistant disperse dyes C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 56, and carry out traditional acid dyeing process dyeing of white polyester jersey fabric. The process formula and process are as follows:

The dyeing process flow chart is shown in Figure 1.

Example 6

Select alkali-resistant disperse dyes C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 56, and carry out basic dyeing process dyeing. The process formula is as follows:

Disperse dyes/%(o.w.f)2

"Basic Chromosome 1"/g·L ^-1 2

Bath ratio 1:50

Pre-dyed fabric and other dyeing processes are all the same as in Example 5.

The initial pH value of the dye bath is 9.3. When the temperature rises to 135°C during the dyeing process, the pH value of the dye bath is 9.2. After the dyeing process, the pH value of the dye bath remains at 9.2.

Example 7

Select alkali-resistant disperse dyes C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 56, and carry out basic dyeing process dyeing. The process formula is as follows:

Disperse dyes/%(o.w.f)2

"Basic Chromosome 2"/g·L ^-1 4

Bath ratio 1:50

Pre-dyed fabric and other dyeing processes are all the same as in Example 5.

The initial pH value of the dye bath is 9.4. When the temperature rises to 135°C during the dyeing process, the pH value of the dye bath is 9.2. After the dyeing process, the pH value of the dye bath remains at 9.3.

Example 8

Select alkali-resistant disperse dyes C.I. Disperse Yellow 54, C.I. Disperse Red 60, and C.I. Disperse Blue 56, and carry out basic dyeing process dyeing. The process formula is as follows:

Disperse dyes/%(o.w.f)2

"Basic Chromosome 3"/g·L ^-1 5

Bath ratio 1:50

Pre-dyed fabric and other dyeing processes are all the same as in Example 5.

The initial pH value of the dye bath is 9.2. When the temperature rises to 135°C during the dyeing process, the pH value of the dye bath is 9.3. After the dyeing process, the pH value of the dye bath remains at 9.2.

Table 1 Comparison of polyester fabric dyeing parameters in acid dyeing process and alkaline dyeing process

Table 2 Comparison of color fastness between alkaline dyed and acid dyed fabrics

The color fastness to rubbing is tested according to GB/T3920-2008 "Textile Color Fastness Tests Color Fastness to Rubbing"

The color fastness to soaping is tested according to GB/T3921—2008 "Textile Color Fastness Tests Color Fastness to Soaping"

Example 9

The factory set out, the liquid volume of the overflow dyeing machine is 3000L, and the dyeing is carried out after refining and washing. The dyeing formula is as follows:

Fabric: polyester textured silk fabric

Disperse Yellow 54/%(o.w.f)0.1

"Basic Chromosome 1"/g·L ^-1 5

Bath ratio 1:15

His dyeing process is all the same as in Example 5,

The initial pH value of the dye bath is 9.4. When the temperature rises to 135°C during the dyeing process, the pH value of the dye bath is 9.3. After the dyeing process, the pH value of the dye bath remains at 9.3.

After dyeing, wash once in hot water, wash once in cold water, and measure the color fastness of the fabric after drying: both dry and wet rubbing fastness are 4-5 grades, staining fastness is 3-4 grades, color fastness to fading is 4-5 class. The fabric feels soft to the touch.

Example 10

The factory set out, the liquid volume of the overflow dyeing machine is 3000L, and the dyeing is carried out after refining and washing. The dyeing formula is as follows:

Fabric: polyester textured silk fabric

Disperse Red 60/% (o.w.f) 10

"Basic Chromosome 3"/g·L ^-1 5

Bath ratio 1:20

His dyeing process is all the same as in Example 5,

The initial pH value of the dye bath is 9.2. When the temperature rises to 135°C during the dyeing process, the pH value of the dye bath is 9.3. After the dyeing process, the pH value of the dye bath remains at 9.3.

After dyeing, wash with reducing soap once, wash with hot water once, wash with cold water once, after drying, measure the color fastness of the fabric: the dry and wet rubbing fastness is 4-5, the staining fastness is 3-4, and the color is faded Color fastness level 4-5. The fabric feels soft to the touch.

Claims (2)

1. the application of terylene basic dyeing one auxiliary agent in dyeing, is characterized in that:

Described one auxiliary agent percentage is calculated, and comprises following component,

Described is applied as, and described one auxiliary agent is applied to alkaline dye bath dyeing.

2. the application of terylene basic dyeing one auxiliary agent as claimed in claim 1 in dyeing, it is characterized in that: adopt in the dyeing of described terylene basic dyeing one auxiliary agent, dyeing recipe comprises; bath raio is 1:15 ~ 50; alkali resistance disperse dye is the 0.1-10% of fabric weight, and the concentration of terylene basic dyeing one auxiliary agent in dye liquor is 2-5gL ^-1.