阅读说明：本技术 一种适用于羊毛织物的无尿素喷墨印花预处理液及预处理方法 (Non-urea ink-jet printing pretreatment liquid suitable for wool fabric and pretreatment method ) 是由 房宽峻 安芳芳 刘秀明 李畅 梁迎超 刘昊 于 2020-04-20 设计创作，主要内容包括：一种适用于羊毛织物的无尿素喷墨印花预处理液及预处理方法,该预处理液包括以下质量百分比的组分：0.5~3%的聚合物；0.5~2%的季铵盐型阳离子表面活性剂；0.1~4%的pH调节剂；余量为水。将该预处理液通过浸轧或涂层的方法施加到羊毛织物表面,得到带液率为60~100%的预处理织物。使用本发明喷墨印花预处理制备的喷墨印花羊毛织物表观得色量高,清晰度好,颜色更加鲜艳。(The urea-free ink-jet printing pretreatment liquid suitable for wool fabrics and the pretreatment method thereof comprise the following components in percentage by mass: 0.5-3% of a polymer; 0.5-2% of quaternary ammonium salt cationic surfactant; 0.1-4% of a pH regulator; the balance being water. The pretreatment liquid is applied to the surface of the wool fabric through a padding or coating method, and the pretreatment fabric with the liquid carrying rate of 60-100% is obtained. The ink-jet printing wool fabric prepared by the ink-jet printing pretreatment has high apparent color yield, good definition and more bright color.)

1. The urea-free ink-jet printing pretreatment liquid suitable for wool fabrics is characterized by comprising the following components in percentage by mass:

0.5-3% of a polymer;

0.5-2% of quaternary ammonium salt cationic surfactant;

0.1-4% of a pH regulator;

the balance being water.

2. The non-urea ink-jet printing pretreatment liquid suitable for wool fabrics according to claim 1, wherein the polymer is at least one of sodium carboxymethyl cellulose, carboxymethyl hydroxypropyl cellulose, hydroxyethyl cellulose and hydroxypropyl starch.

3. The non-urea inkjet printing pretreatment solution suitable for wool fabrics according to claim 1, wherein the surfactant is at least one of dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, hexadecyl dimethyl benzyl ammonium chloride and octadecyl dimethyl benzyl ammonium chloride.

4. The non-urea ink jet printing pretreatment liquid suitable for wool fabrics according to claim 1, wherein the pH regulator is ammonium sulfate; the pH value of the pretreatment liquid is 5.0-6.8.

5. The urea-free ink-jet printing pretreatment liquid suitable for wool fabrics according to claim 1, wherein 0.5-4% of an anticorrosive bactericide is added into the pretreatment liquid in percentage by mass; the antiseptic bactericide is at least one of 5-chloro-2-methyl-4-isothiazoline-3-ketone, 4-chloro-3, 5-dimethylphenol and 3-methyl-4-isopropylphenol.

6. The urea-free ink-jet printing pretreatment liquid suitable for wool fabrics according to claim 1, wherein 0.1-1% of a water softener is added into the pretreatment liquid in percentage by mass; the water softener is sodium hexametaphosphate or disodium ethylene diamine tetraacetate.

7. The urea-free ink-jet printing pretreatment liquid suitable for wool fabrics according to claim 1, wherein an anti-reducing agent is added into the pretreatment liquid in a mass percentage of no more than 1%, and the anti-reducing agent is sodium m-nitrobenzenesulfonate or sodium m-nitro-p-toluenesulfonate.

8. A method for pretreating wool fabrics with the urea-free ink-jet printing pretreatment solution suitable for wool fabrics according to claim 1, comprising the steps of:

(1) the pretreatment liquid is applied to the surface of the wool fabric by padding or coating,

(2) and (3) drying the wool fabric subjected to the step (1).

9. The method for pretreating the wool fabric by using the urea-free ink-jet printing pretreatment solution suitable for the wool fabric according to claim 8, wherein the liquid carrying rate of the fabric in the step (1) is 60-100%, and the water content of the fabric after drying in the step (2) is 5-20%.

Technical Field

The invention belongs to the technical field of inkjet printing of textiles, and particularly relates to a urea-free inkjet printing pretreatment liquid and a pretreatment method suitable for wool fabrics.

Background

Wool fibers are mainly composed of an outer scale layer and an inner cortex layer, and are natural protein fibers. Because of having soft hand feeling, excellent hygroscopicity and warmth retention, the fabric is popular with consumers.

However, the traditional printing process is complex, the small-batch production cost is high, and the wool printing fabric in the market has very small occupation ratio. The inkjet printing technology of the textiles, which can realize high definition, small batch production and low energy consumption, brings opportunities for printing the textiles by wool. Unlike conventional printing, ink jet printed patterns are formed by mixing ink droplets jetted on the surface of a fabric, however, a pretreating agent capable of helping the binding of a dye to a fiber cannot be directly added to the ink. If ink droplets are directly sprayed on the surface of untreated wool fabrics, excessive bleeding can result in low color yield and poor definition of the printed fabrics. Therefore, the wool fabric must be treated before ink jet printing to promote the adsorption and fixation of ink droplets on the fiber surface, thereby improving the ink jet printing performance.

The invention discloses a wool knitted fabric ink-jet printing process, wherein the fabric subjected to microwave radiation pretreatment is pretreated by a padding method, the liquid carrying rate is 65%, the bath ratio is 1:10, 5% of wheat starch, 3% of an anti-seepage agent, 1% of sodium salt, 0.5% of a defoaming agent and 3% of a light fastness improving agent are added, the fabric is treated by a special ink-jet printing pigment ink after pretreatment, after fixation, the unfixed dye ink can be effectively removed by an alkali washing process, the chemical resistance of the pigment is stimulated, and the water-washing resistance of the pigment are enhanced. But is not suitable for the ink-jet printing of reactive dye ink and acid dye ink of wool fabrics. CN 106894244B discloses a digital printing pretreatment slurry suitable for worsted fabrics and a preparation method thereof: the composite material comprises the following raw materials in parts by weight: 10-12 parts of urea, ammonium sulfate: 4-7, 1-3 of AR, 1-3 of AP, 0.5-2 of UNI, guar gum: 1-3, water: 70-80. Through the pretreatment of the sizing agent, the wool fabric is more firmly colored and brighter in color, and the visual requirements of different users are met. The urea is used as a moisture absorption cosolvent, and is beneficial to swelling of a size film and fibers during steaming fixation, so that dye is favorably transferred from the size film to the surfaces of the fibers, and the apparent color yield of the printed fabric is improved. However, the use of urea causes the ammonia nitrogen index of the water body to be increased sharply and the eutrophication phenomenon of the water body to be serious, which is not beneficial to ecological environmental protection.

Disclosure of Invention

The invention aims to solve the technical problem of providing the urea-free ink-jet printing pretreatment liquid and the pretreatment method suitable for the wool fabric. The wool ink-jet printing fabric obtained by the method has the advantages of high apparent color depth, high definition, high color vividness and environmental friendliness.

In order to solve the technical problems, the invention adopts the technical scheme that: the urea-free ink-jet printing pretreatment liquid suitable for wool fabrics is characterized by comprising the following components in percentage by mass:

0.5-3% of a polymer;

0.5-2% of quaternary ammonium salt cationic surfactant;

0.1-4% of a pH regulator;

the balance being water.

The polymer is at least one of sodium carboxymethyl cellulose, carboxymethyl hydroxypropyl cellulose, hydroxyethyl cellulose and hydroxypropyl starch.

The surfactant is at least one of dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, hexadecyl dimethyl benzyl ammonium chloride and octadecyl dimethyl benzyl ammonium chloride.

The pH regulator is ammonium sulfate; the pH value of the pretreatment liquid is 5.0-6.8.

And 0.5-4% of an anticorrosive bactericide is added into the pretreatment solution according to the mass percentage.

The antiseptic bactericide is at least one of 5-chloro-2-methyl-4-isothiazoline-3-ketone, 4-chloro-3, 5-dimethylphenol and 3-methyl-4-isopropylphenol.

And 0.1-1% of water softener is added into the pretreatment liquid according to the mass percentage.

The water softener is sodium hexametaphosphate or disodium ethylene diamine tetraacetate.

And adding an anti-reducing agent in an amount of not more than 1% by mass into the pretreatment solution.

The anti-reducing agent is sodium m-nitrobenzenesulfonate or sodium m-nitro-p-toluenesulfonate.

The method for pretreating the wool fabric by using the urea-free ink-jet printing pretreatment solution suitable for the wool fabric is characterized by comprising the following steps of:

(1) the pretreatment liquid is applied to the surface of the wool fabric by padding or coating,

(2) and (2) drying the wool fabric subjected to the step (1).

The liquid carrying rate of the fabric in the step (1) is 60-100%, and the water content of the dried fabric in the step (2) is 5-20%.

The preferable technical scheme is that the polymer is carboxymethyl hydroxypropyl cellulose with the content of 1-2%.

The preferable technical scheme is that the surfactant is octadecyl trimethyl ammonium chloride, and the content of the surfactant is 1-1.5%.

The preferable technical scheme is that the content of the pH regulator ammonium sulfate is 1-2%.

The preferable technical scheme is that the pH value of the pretreatment liquid is 5.5-6.5.

The preferable technical scheme is that the antiseptic bactericide is 2-methyl-4-isothiazoline-3-ketone with the content of 1.5-2.5%.

The preferable technical scheme is that the water softener is sodium hexametaphosphate, and the content of the water softener is 0.5-1%.

The preferable technical scheme is that the anti-reducing agent is sodium m-nitrobenzenesulfonate, and the content of the sodium m-nitrobenzenesulfonate is 0.1-0.6%.

The preferable technical scheme is that the pretreatment method is a padding method, and the liquid carrying rate of the fabric is 75-85%.

The preferable technical scheme is that the water content of the dried fabric is 10-18%.

The invention has the beneficial effects that:

(1) the pretreatment liquid for the inkjet printing of the wool fabric, which is prepared by the invention, does not contain urea, reduces the emission of ammonia nitrogen, and is environment-friendly.

(2) The invention uses quaternary ammonium salt cationic surfactant to improve the moisture absorption of fabric and the electrostatic attraction to dye molecules, which is beneficial to the combination of dye and fabric.

(3) The polymer used in the invention has high viscosity, good rheological property and film forming property, is beneficial to inhibiting excessive penetration of ink drops on the surface of a fabric, and is more suitable for fine patterns.

(4) The ink-jet printing wool fabric prepared by the ink-jet printing treating agent has high apparent color yield, good definition and more bright color.

Detailed Description

The invention provides a urea-free ink-jet printing pretreatment liquid suitable for wool fabrics and a pretreatment method, and is characterized in that the pretreatment liquid comprises the following components in percentage by mass:

0.5-3% of a polymer;

0.5-2% of quaternary ammonium salt cationic surfactant;

0.1-4% of a pH regulator;

0.5-4% of an antiseptic bactericide;

0.1-1% of a water softener;

0-1% of an anti-reducing agent;

the balance being water.

The method for pretreating the wool fabric by using the urea-free ink-jet printing pretreatment solution suitable for the wool fabric is characterized by comprising the following steps of:

(1) the pretreatment liquid is applied to the surface of the wool fabric by padding or coating,

(2) and (2) drying the wool fabric subjected to the step (1).

The liquid carrying rate of the fabric in the step (1) is 60-100%, and the water content of the dried fabric in the step (2) is 5-20%.

The raw material source of the treating agent is not particularly limited, and a commercially available product can be adopted.

In the printing treatment liquid provided by the embodiment of the invention, one or more of quaternary ammonium salt type cationic surfactants dodecyl trimethyl ammonium chloride, hexadecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, hexadecyl dimethyl benzyl ammonium chloride and octadecyl dimethyl benzyl ammonium chloride are adopted, the surfactant forms micelles on the surface of the fabric, cationic groups face air, the hygroscopicity of the treated fabric and the electrostatic attraction to negatively charged dye molecules can be improved, and the combination of the dye molecules and the fabric is facilitated in the steaming process.

In the printing processing liquid provided by the embodiment of the invention, one or more of polymers of sodium carboxymethyl cellulose, carboxymethyl hydroxypropyl cellulose, hydroxyethyl cellulose and hydroxypropyl starch with high viscosity, good rheological property and good film forming property are adopted, so that excessive penetration of ink drops on the surface of a fabric can be prevented. This is because the treating agent is transferred to the fabric surface under the action of shear forces, and when subjected to shear forces, the viscosity of the treating agent, which is highly rheological, can be rapidly reduced, transferred to the fabric surface and spread uniformly, and when the shear forces are removed, the treating agent forms a relatively thin and uniform film on the fabric surface. The film formed by the treating agent blocks the capillary on the surface of the fabric, ink drops are difficult to excessively seep on the surface of the treating agent film with higher viscosity, and in addition, the thinner treating agent film shortens the distance of the dye to spread to the fabric across the film, so the treated wool ink-jet printing fabric can obtain fine patterns.

In the printing treatment liquid provided by the embodiment of the invention, ammonium sulfate is used for adjusting the printing treatment liquid to be acidic. The ammonium sulfate is strong acid weak base salt, the aqueous solution of the ammonium sulfate is acidic, and ammonia gas is continuously released in the steaming process, so that a weak acid environment for the reaction of the reactive dye and the fiber is ensured; wool is not alkali-resistant and the groups in wool that react mainly with reactive dyes are mercapto and amino groups, which can react with dyes under weakly acidic and neutral conditions, so the embodiment of the present invention uses ammonium sulfate to adjust the printing paste to be weakly acidic. The invention is not only suitable for the reactive dye ink-jet printing, but also suitable for the acid dye ink-jet printing.

In the printing treatment liquid provided by the embodiment of the invention, one or more of antiseptic bactericides 5-chloro-2-methyl-4-isothiazolin-3-one, 4-chloro-3, 5-dimethylphenol and 3-methyl-4-isopropylphenol are used, so that the printing treatment liquid has strong inhibiting and killing effects on common bacteria, fungi, algae and the like, can inhibit the growth and reproduction of microorganisms and can protect the treatment liquid from being damaged.

In the printing treatment liquid provided by the embodiment of the invention, the water softener sodium hexametaphosphate or disodium ethylene diamine tetraacetate is used, so that the water softener has very excellent complexing force on metal ions such as calcium and magnesium, color spots and color spots caused by precipitation of heavy metal ions and anionic dye can be avoided, the rubbing fastness of printed fabrics is improved, and therefore, the water softener has no requirement on water in the treatment liquid and can be deionized water or tap water.

In the printing treating fluid provided by the embodiment of the invention, the reducing agent sodium m-nitrobenzenesulfonate or sodium m-nitro-p-toluenesulfonate is used, so that the dye can be effectively prevented from being reduced in the printing process, and the color light of the printed fabric is protected from being damaged.

The embodiment of the invention applies reactive dye ink or acid dye ink to carry out ink-jet printing. The invention has no special limitation on the color and the structural composition of the reactive dye ink or the acid dye ink used for the ink-jet printing, and can adopt the conventional commercially available ink. Wherein the color of the ink includes cyan, magenta, yellow, black, and the like.

The embodiment of the invention applies the pretreatment liquid to the surface of the fabric by using a padding or coating method, the liquid carrying rate of the fabric is 60-100%, and the color block with the filling rate of 100% is subjected to ink-jet printing on the surface of the fabric after drying.

The color performance of the ink-jet printing fabric obtained in the embodiment of the invention is tested by using a Datacolor SF-600 colorimeter under the conditions of a D65 light source, a 10-degree visual angle and a 3mm measuring aperture, the monochrome color blocks of the ink-jet printing fabric are folded by 4 layers, 8 points are randomly selected to measure K/S values and color data such as brightness L, red and green light a, yellow and blue light b, color saturation C, hue angle h degrees and the like, and the average value is obtained by averaging the results, and the apparent color depth K/S value of the fabric is calculated as follows:

K/S＝(1-R)²/(2×R)；

in the formula, K represents the absorption coefficient of the fabric to light, S represents the scattering coefficient, and R represents the reflectivity at the maximum absorption wavelength of the dye. Unless otherwise specified herein, the K/S value generally refers to the apparent color value of the front side of the fabric.

The anti-seepage performance of the ink-jet printed fabric obtained in the embodiment is tested, a straight line with the width of 500 micrometers is printed on the surface of the fabric, a video microscope is used for testing the line width, and the thinner the actual line width is, the better the anti-seepage performance of the fabric is.

The inkjet printed fabric obtained in the embodiment is subjected to tests such as breaking strength and the like; the breaking strength of the fabric was operated according to the method described in GB/T3923.1-2003 "test strips for the tensile Properties of textile fabrics first part breaking strength and elongation at break". The test fabric was a 30 cm long by 5 cm wide strip, which was averaged over three tests.

For further understanding of the present application, the enzyme treatment method of wool woven fabric and the inkjet printing method of wool woven fabric provided in the present application are specifically described below with reference to some examples. It should be understood that the described embodiments are only some of the embodiments of the present invention, and should not be construed as limiting the scope of the present invention.