CN103114473A - Pigment dyeing method for cotton fabric - Google Patents

Abstract

The invention provides a paint dyeing method for cotton fabrics and relates to the field of textiles. The method includes firstly performing low-temperature plasma pretreatment on the cotton fabric, and then performing paint dyeing; the low-temperature plasma is normal-pressure dielectric barrier discharge plasma. The coating dyeing method of the cotton fabric dielectric barrier discharge low-temperature plasma pretreatment of the present invention has no water and normal pressure treatment, is clean and efficient, has little environmental pollution, and can be processed continuously. The dyeing effect and color fastness meet the requirements, and is suitable for textile fabrics mass production.

Description

A kind of coating dyeing method of cotton fabric

technical field

The invention relates to a cotton fabric paint dyeing technique, and furthermore, relates to a paint dyeing method for cotton fabric pretreated by normal-pressure low-temperature plasma.

Background technique

Pigment dyeing is a technology that fixes paint on the surface of fibers or fabrics by means of adhesives to achieve surface coloring. It has the characteristics of simple process, low investment, energy saving, no need for washing, and less waste liquid discharge. It is widely used in textiles. dyeing. However, there is the problem of sticking to the roller in paint dyeing, and the dyed fabric has problems such as hard hand feeling and poor fastness. Stone washing, grinding white, blue pattern and other effects, this technology is applied in garment dyeing, yarn dyeing, knitted fabric dyeing and other fields.

Plasma technology has been introduced into the textile field since the 1960s, and low-temperature plasma is used for the performance characteristics of textiles. Low-temperature plasma surface modification is a dry treatment, which is energy-saving and water-saving, clean and efficient, simple to operate and easy to control, and less environmental pollution. The fabric treated by this method only acts on the micron-level superficial layer of the fiber, without destroying the properties of the fiber itself, so that the surface properties of the fiber can be changed to achieve ideal dyeing and finishing effects. The dry processing characteristics of textile modification by low-temperature plasma directly challenge the traditional chemical wet processing method with water as the medium. In recent years, research on the application of low-temperature plasma technology in the textile field has been strengthened at home and abroad.

Low temperature plasma is divided into dielectric barrier discharge, glow discharge and corona discharge. There are attempts in the prior art to apply glow discharge or corona discharge plasma technology to the field of cotton fabric dyeing. Low-temperature plasma technology can realize the surface modification of fibers in the normal pressure state to replace cationic modification to achieve the goal of anhydrous processing. However, glow discharge must be vacuumed during processing, and continuous processing cannot be performed. The effect of corona discharge treatment is not ideal.

Contents of the invention

Aiming at the problems existing in the dyeing technology of cotton fabrics in the prior art, such as the dyeing technology of cotton fabrics treated with cationic modification, water consumption and pollution caused by chemical wet processing with water as the medium. The invention provides a coating dyeing method for cotton fabrics treated with dielectric barrier discharge low-temperature plasma, anhydrous, normal pressure treatment, clean and efficient, less environmental pollution, and continuous processing, dyeing effect and color fastness meet the requirements, suitable for Mass production of textile fabrics.

The purpose of this invention is to provide a kind of coating dyeing method of cotton fabric.

The paint dyeing method for cotton fabrics of the present invention comprises the steps of pretreating the cotton fabrics with low-temperature plasma, and then dyeing the paint, wherein the low-temperature plasma is normal-pressure dielectric barrier discharge plasma.

In the cotton fabric dyeing method of the present invention, a dielectric barrier discharge plasma treatment device is used to pretreat the cotton fabric. The equipment used is a plasma equipment using dielectric barrier discharge in the prior art, a plasma discharge device described in Chinese patent CN201515547U.

When using dielectric barrier plasma equipment to pretreat cotton fabrics, the working power is preferably 2000-6000W, and the treatment time can be determined according to actual conditions. Preferably 2 to 15 minutes.

The cotton fabric dyeing method of the present invention can be applicable to various cotton fabrics of the prior art, and the pure cotton fabric with unit weight of 150～300g/ ^cm2 is preferred.

Specifically, the cotton fabric paint dyeing method of the present invention includes paint exhaust dyeing, binder dyeing, dehydration, drying and baking.

Wherein the bath ratio of the cotton fabric and the liquid in the dyeing stage of the paint is 1: (10-50). The liquid agent includes water and paint, and the amount of paint is 1-3% o.w.f (percentage of fabric or fiber weight). The paint can adopt various paints in the existing textile paint dyeing technology, preferably the average particle diameter of the paint is 20-200nm.

In the dyeing stage of the paint, the cotton fabric can be dipped in the liquid for 5 to 15 minutes at room temperature, and then heated to 60 to 80° C. for 10 to 30 minutes.

Wherein, in the continuous dyeing stage of the adhesive, the adhesive is added to the liquid in the above-mentioned paint exhausting stage, and the volume weight concentration of the adhesive in the liquid is 10-30 g/L. The adhesive is also selected from various adhesives in the existing textile paint dyeing technology, preferably at least one of polyacrylic adhesives and polyurethane adhesives.

In the adhesive dyeing stage, the temperature of the adhesive dyeing can be kept consistent with the final temperature of the coating dyeing stage, preferably at 60-80°C. The time of the adhesive dyeing can be determined according to the actual situation, preferably 10 ~20 minutes.

In the cotton fabric paint dyeing method of the present invention, after plasma pretreatment, paint exhaust dyeing, adhesive dyeing, subsequent dehydration, drying, baking, etc., are all conventional means in the existing textile paint dyeing technology. Generally, after the continuous dyeing of the adhesive, the cotton fabric is dehydrated, then dried at 70-90°C, and then baked, generally at 120-150°C for 1-4 minutes.

The cotton fabric paint dyeing method of the present invention uses the low-temperature plasma of the normal-pressure dielectric barrier discharge to treat the cotton fabric with the normal-pressure low-temperature plasma, which is a dry processing technology, and only modifies the surface of the cotton fiber without affecting the fiber itself The properties, dyeing effect and color fastness meet the requirements; the method is energy-saving and water-saving, clean and efficient, has little environmental pollution, can realize continuous processing and has a better effect on fabric treatment than corona discharge.

Detailed ways

Below in conjunction with embodiment, further illustrate the present invention.

Raw materials and equipment:

1. Pure cotton twill fabric: 340 threads/10cm×250 threads/10cm, 243g/m ² , width 1.5m.

2. Paint:

Imperon red K-BC, Imperon yellow K-RC, and Imperon blue K-BC are products of DyStar; the red, yellow and blue paints in common paints are all products of Beijing Caimei Printing and Dyeing Auxiliaries Co., Ltd.

3. Adhesive:

Polyurethane adhesive (PU), product of Shandong Textile Science Research Institute.

4. Cationic modifier: quaternary ammonium salt cationic modifier FK-316, a product of Beijing China Textile Chemical Co., Ltd.

5. Plasma discharge equipment: dielectric barrier discharge plasma equipment, same as Chinese patent CN201515547U, developed by Institute of Microelectronics, Chinese Academy of Sciences.

Experimental test methods and standards:

1) Determination of K/S value

The apparent depth of a dyed sample refers to the intuitive sense of depth that the color of an opaque solid substance gives people. The size of the surface depth is often affected by various factors such as the amount of colored substance in the solid substance, the physical state of the colored substance, and the optical properties of the solid surface. The size of the surface depth value can be expressed by the Kubela-Munk function value, that is, the K/S value:

$\mathrm{<span\; class="notranslate">\; K</span>}<span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; =</span>\frac{{<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; R</span>}}_{<span\; class="notranslate">\; \&infin;</span>}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}{\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; R</span>}}_{<span\; class="notranslate">\; \&infin;</span>}}$

In the formula: R _∞ - represents the reflectance of the colored sample tending to be infinitely thick, and can also be expressed by R (reflectance when light is not transmitted);

K- represents the absorption coefficient of the colored substance;

S- represents the scattering coefficient;

The larger the K/S value, the darker the color; the smaller the K/S value, the lighter the color.

2) Determination of level dyeing

Choose any point on the fabric as a standard point, measure the color difference ΔE _i between it and any 10 points on the color difference meter, use the following formula to calculate the standard deviation S of the sample, and use the S value to evaluate the level dyeing property of fabric dyeing:

$\mathrm{<span\; class="notranslate">\; S</span>}<span\; class="notranslate">\; =</span>\sqrt{\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; no</span>}}<span\; class="notranslate">\; \&CenterDot;</span>\underset{\mathrm{<span\; class="notranslate">\; i</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; no</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}\mathrm{<span\; class="notranslate">\; \&Delta;</span>}{{\mathrm{<span\; class="notranslate">\; E.</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}$

In the formula: S—sample standard deviation.

The smaller the S value, the better the level dyeing property.

3) Determination of color fastness

(1) Determination of color fastness to rubbing:

Dry rubbing fastness and wet rubbing fastness are tested according to GB/T 3920-1997 Test method for color fastness to rubbing of textiles.

(2) Determination of color fastness to scrubbing:

Test according to GB/T 420-2009 Test method for color fastness to washing of textiles.

(3) Determination of color fastness to soaping:

Test according to GB/T 3921.1-1997 Test method for color fastness to washing of textiles.

(4) Determination of color fastness to sunlight:

Test according to GB/T 8427-1998 Test method for color fastness of textiles to artificial light.

4) Determination of cotton fabric stiffness:

Refer to the GB/T 18318-2001 Determination Standard for the Bending Length of Textile Fabrics to measure the stiffness of the dyed fabrics.

Example 1

The pure cotton twill fabric was pretreated by dielectric barrier discharge plasma equipment, the processing power was 3000W, and the processing time was 2.8min. Then mix the paint Imperon red K-BC (average particle size 100nm) with water to form a paint liquid, the amount of paint is 1% (o.w.f), and the above pretreated cotton fabric is immersed in the paint dyeing solution with a bath ratio of 1:50. In the liquid, the paint is dipped for 10 minutes at room temperature, and the temperature is raised to 70°C for 10 minutes; then 20g/L of PU adhesive is added to the dipping liquid, and the adhesive is dyed for 10 minutes; after that, it is dehydrated and baked at 70°C Dry for 3 minutes, and finally bake at 120°C for 3 minutes to obtain dyed cotton fabric 1. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 1.

Example 2

Except that coating is changed into Imperon yellow K-RC (average particle diameter 90nm), all the other conditions are the same as embodiment 1. Dyed cotton fabric 2 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 1.

Example 3

Except changing coating into Imperon blue K-BC (average particle diameter 50nm), all the other conditions are the same as embodiment 1. Dyed cotton fabric 3 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 1.

Example 4

Except changing the red paint (average particle diameter 590nm) of paint into common paint, all the other conditions are the same as embodiment 1. Obtain dyed cotton fabric 4. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 1.

Example 5

Except that the yellow coating (average particle diameter 530nm) that coating is changed into common coating, all the other conditions are all the same as embodiment 1. Obtain dyed cotton fabric 5. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 1.

Example 6

Except that coating is changed into the blue coating (average particle diameter 520nm) of common coating, all the other conditions are all the same as embodiment 1. Dyed cotton fabric 6 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 1.

Table 1

It can be seen from Table 1 that under the same experimental conditions, for paints of the same color but different particle sizes, the paint with smaller particle size has a better dyeing effect than the paint with larger particle size .

Example 7

Except that the processing power of the dielectric barrier discharge plasma equipment for pretreatment is changed to 4000W, other conditions are the same as in embodiment 1. Dyed cotton fabric 7 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 2.

Example 8

Except that the processing power of the dielectric barrier discharge plasma equipment for pretreatment is changed to 4000W, other conditions are the same as in embodiment 2. Dyed cotton fabric 8 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 2.

Example 9

Except that the processing power of the dielectric barrier discharge plasma equipment for pretreatment is changed to 4000W, other conditions are the same as in embodiment 3. Dyed cotton fabric 9 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 2.

Example 10

Except that the processing power of the dielectric barrier discharge plasma equipment for pretreatment is changed to 5000W, other conditions are the same as in embodiment 1. A dyed cotton fabric 10 is obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 2.

Example 11

Except that the processing power of the dielectric barrier discharge plasma equipment for pretreatment is changed to 5000W, other conditions are the same as in embodiment 2. Dyed cotton fabric 11 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 2.

Example 12

Except that the processing power of the dielectric barrier discharge plasma equipment for pretreatment is changed to 5000W, other conditions are the same as in embodiment 3. A dyed cotton fabric 12 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 2.

Table 2

Comparative example 1

Carry out cationic modification pretreatment to pure cotton twill fabric, wherein the cationic modification prescription used is: treatment liquid is the aqueous solution of cationic modifier, the dosage of cationic modifier FK-316 is 5% (o.w.f.), with anhydrous Sodium carbonate adjusts the pH to 9-11, the bath ratio is 1:20, the treatment temperature is 75°C, and the treatment time is 30 minutes. Next, use the paint Imperon red K-BC and water to form a paint liquid, the paint dosage is 1% (o.w.f), and the pure cotton twill fabric is dip-dyeed at room temperature for 10 minutes, and the temperature is raised to 70 °C according to the bath ratio of 1:20. The paint was exhausted for 10 minutes; then 20 g/L of PU binder was added to the paint liquid, and the dyeing was continued for 10 minutes, dehydrated, dried at 70°C for 3 minutes, and baked at 120°C for 3 minutes to obtain comparative dyed cotton fabric 1. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 3.

Comparative example 2

Except that the paint was changed to Imperon Yellow K-RC, the other conditions were the same as in Comparative Example 1. A comparative dyed cotton fabric 2 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 3.

Comparative example 3

Except that the paint was changed to Imperon blue K-BC, the other conditions were the same as in Comparative Example 1. A comparative dyed cotton fabric 3 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 3.

Example 13

The pure cotton twill fabric was pretreated by dielectric barrier discharge plasma equipment, the processing power was 3000W, and the processing time was 2.8min. Then mix the paint impregnation liquid with the paint Imperon red K-BC (average particle diameter 100nm) and water, the paint consumption is 1% (o.w.f), the cotton fabric that will be pretreated above is immersed in the paint impregnation liquid according to the ratio of 1:20 Liquor ratio, the paint is dipped for 10 minutes at room temperature, and the temperature is raised to 70°C for 10 minutes; then 20g/L of PU adhesive is added to the liquid, and the adhesive is dyed for 10 minutes; after that, it is dehydrated and baked at 70°C Dry for 3 minutes, and finally bake at 120°C for 3 minutes to obtain dyed cotton fabric 13. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 3.

Example 14

Except changing coating into Imperon yellow K-RC, all the other conditions are the same as embodiment 13. Dyed cotton fabric 14 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 3.

Example 15

Except changing coating into Imperon blue K-BC, all the other conditions are the same as embodiment 13. A dyed cotton fabric 15 was obtained. Various tests were carried out on the dyed cotton fabric, and the data results are shown in Table 3.

table 3

As can be seen in Table 3, the cotton fabric dyed by the paint after the dielectric barrier discharge plasma pretreatment of the present invention can fully reach the effect and color fastness of cationic pretreatment paint dyeing in the prior art, but the method of the present invention is without Water treatment, energy saving and environmental protection, no chemical pollution, can be very suitable for large-scale cotton fabric dyeing production.

Claims (10)

1. the coating dyeing method of a COTTON FABRIC, comprise first COTTON FABRIC is carried out the low temperature plasma preliminary treatment, then carries out pigment dyeing, it is characterized in that: described low temperature plasma is the atmospheric dielectric barrier discharge plasma.

2. COTTON FABRIC coating dyeing method as claimed in claim 1, it is characterized in that: wherein said dielectric barrier discharge plasma processing power is 2000～6000W.

3. COTTON FABRIC coating dyeing method as claimed in claim 2, it is characterized in that: the wherein said dielectric barrier discharge plasma processing time is 2～15 minutes.

4. COTTON FABRIC coating dyeing method as claimed in claim 1, it is characterized in that: described COTTON FABRIC is that the unit grammes per square metre is 150～300g/cm ²Pure cotton fabric.

5. COTTON FABRIC coating dyeing method as described in one of claim 1～4 is characterized in that: wherein said pigment dyeing comprises exhaust dyeing with pigment, adhesive is continuous dyes, dewaters, dries and bakes.

6. COTTON FABRIC coating dyeing method as claimed in claim 5 is characterized in that: wherein said exhaust dyeing with pigment in the stage bath raio of COTTON FABRIC and dip dyeing liquid for shell be 1: (10～50), wherein dip dyeing liquid for shell comprises water and coating, the coating consumption is 1～3%o.w.f; Continuous the dying of described adhesive in the stage adds adhesive in above-mentioned dip dyeing liquid for shell, and the volume weight concentration of adhesive in dip dyeing liquid for shell is 10～30g/L.

7. COTTON FABRIC coating dyeing method as claimed in claim 6, it is characterized in that: the average grain diameter of wherein said coating is 20～200nm.

8. COTTON FABRIC coating dyeing method as claimed in claim 6 is characterized in that: wherein said adhesive is at least a in polyacrylic binder, polyurethane binding.

9. COTTON FABRIC coating dyeing method as claimed in claim 5, it is characterized in that: the wherein said exhaust dyeing with pigment stage comprises at room temperature contaminated COTTON FABRIC 5～15 minutes, then was warmed up to 60～80 ℃ and contaminated 10～30 minutes.

10. COTTON FABRIC coating dyeing method as claimed in claim 5 is characterized in that:

The wherein said exhaust dyeing with pigment stage comprises at room temperature contaminated COTTON FABRIC 5～15 minutes in dip dyeing liquid for shell, then being warmed up to 60～80 ℃ contaminated 10～30 minutes, wherein the bath raio of COTTON FABRIC and dip dyeing liquid for shell is 1: (10～50), dip dyeing liquid for shell comprises water and coating, the coating consumption is 1～3%o.w.f, and the average grain diameter of described coating is 20～200nm;

The wherein said continuous stage of dying adds adhesive in above-mentioned dip dyeing liquid for shell, and the volume weight concentration of adhesive in dip dyeing liquid for shell is 10～30g/L, and adhesive is at least a in polyacrylic binder, polyurethane binding; Described adhesive is continuous to be dyed the stage continuous to dye temperature is 60～80 ℃, and the time is 10～20 minutes.