阅读说明：本技术 一种提升活性印花织物手感的脱糊剂及其制备方法 (Desizing agent for improving hand feeling of active printed fabric and preparation method thereof ) 是由 陈松 陈震雷 刘佳雨 于 2021-08-19 设计创作，主要内容包括：本发明公开了一种提升活性印花织物手感的脱糊剂。该脱糊剂包括下述质量份的组分：脂肪醇聚氧乙烯醚20-40份；丙烯酸聚合物5-15份,聚丙烯酰胺1-3份,去离子水25-30份。经大量应用测试,本发明提供的脱糊剂通过添加剂的形式,屏蔽糊料的活性反应基,降低糊料与染料的反应性,有利于织物得色量的提升,同时减少染料与糊料的反应物聚集在织物表面,易洗除,提升织物手感,简化了合成工艺,更有利于工厂使用推广。(The invention discloses a desizing agent for improving the hand feeling of an active printed fabric. The desizing agent comprises the following components in parts by mass: 20-40 parts of fatty alcohol-polyoxyethylene ether; 5-15 parts of acrylic polymer, 1-3 parts of polyacrylamide and 25-30 parts of deionized water. Through a large number of application tests, the desizing agent provided by the invention shields the active reactive group of the paste in the form of an additive, reduces the reactivity of the paste and the dye, is beneficial to the improvement of the color yield of the fabric, reduces the accumulation of reactants of the dye and the paste on the surface of the fabric, is easy to wash away, improves the hand feeling of the fabric, simplifies the synthesis process, and is more beneficial to the use and popularization of a factory.)

1. The desizing agent for improving the hand feeling of the active printed fabric comprises the following raw materials in parts by mass: 20-40 parts of fatty alcohol-polyoxyethylene ether; 5-15 parts of acrylic polymer, 1-3 parts of polyacrylamide, 0.5 part of defoaming agent and 25 parts of deionized water.

2. The desizing agent of claim 1, wherein:

the fatty alcohol-polyoxyethylene ether is at least one of nonionic surfactant of C22-C8 and polymer synthesized by ethylene oxide and/or propylene oxide with the addition number of 8-100;

the acrylic polymer is specifically one of sodium polyacrylate with molecular weight of 5000-50000 or a propylene-maleic copolymer;

the polyacrylamide is nonionic polyacrylamide, and the molecular weight of the polyacrylamide is 200-300 million;

the defoaming agent is one of mineral oil or organic silicon.

3. The desizing agent of claim 1 or 2, wherein: the desizing agent is selected from any one of the following 1) to 4):

1) the desizing agent is prepared from the following raw materials in parts by mass: 40 parts of fatty alcohol-polyoxyethylene ether; 5 parts of acrylic polymer, 3 parts of polyacrylamide, 0.5 part of defoaming agent and 30 parts of deionized water.

2) The desizing agent is prepared from the following raw materials in parts by mass: 30 parts of fatty alcohol-polyoxyethylene ether; 8 parts of acrylic polymer, 2 parts of polyacrylamide, 0.5 part of defoaming agent and 25 parts of deionized water.

3) The desizing agent is prepared from the following raw materials in parts by mass: 35 parts of fatty alcohol-polyoxyethylene ether; 10 parts of acrylic polymer, 1 part of polyacrylamide, 0.5 part of defoaming agent and 25 parts of deionized water.

4) The desizing agent is prepared from the following raw materials in parts by mass: 20 parts of fatty alcohol-polyoxyethylene ether; 15 parts of acrylic polymer, 1 part of polyacrylamide, 0.5 part of defoaming agent and 30 parts of deionized water.

4. A process for preparing a de-pasting agent for improving the hand of reactive printed fabrics according to any of claims 1 to 3, comprising the steps of:

(1) adding deionized water into a reaction kettle, stirring, adding fatty alcohol-polyoxyethylene ether, and continuing stirring for 5-10 min;

(2) adding polyacrylamide into the reaction kettle, and continuously stirring for 10-15 min;

(3) and adding an acrylic polymer into the reaction kettle, and uniformly stirring to obtain the desizing agent.

5. Use of a desizing agent according to any of claims 1 to 3 for improving the feel of reactive printed textiles in the preparation of cotton reactive printing pastes.

6. A cotton reactive printing paste comprising a common cotton reactive printing paste and the desizing agent of any of claims 1-3.

7. Cotton-reactive printing paste according to claim 6, characterized in that: the dosage of the desizing agent is 9-11% of the mass of the cotton active printing paste.

8. Cotton-reactive printing paste according to claim 6, characterized in that: the cotton active printing paste is sodium carboxymethylcellulose (degree of substitution of 1.0), and the dosage of the desizing agent is 10%.

Technical Field

The invention belongs to the technical field of textile chemistry and dyeing and finishing engineering, and particularly relates to a preparation method and application of a desizing agent for improving the hand feeling of an active printed fabric.

Background

Sodium alginate, which does not contain primary hydroxyl group capable of reacting with reactive dye, is used as a common paste for reactive printing, but the price of sodium alginate is continuously increased due to the application of sodium alginate in food, medical treatment and other aspects, and the development of a sodium alginate substitute is stimulated because the secondary hydroxyl group of sodium alginate reacts with dye when the sodium alginate is dyed with strong reactive dye along with the improvement of the quality of printed products. At present, the development of sodium alginate modification, modified sodium carboxymethylcellulose, modified starch and other pastes is mainly focused on at home and abroad, but the existence of primary hydroxyl and secondary hydroxyl cannot be completely solved, and satisfactory printing effect and color fastness cannot be obtained.

Disclosure of Invention

The invention aims to provide a desizing agent for improving the hand feeling of an active printing fabric and improve the printing hand feeling of modified paste such as modified sodium alginate, modified cellulose, modified starch and other modified natural polysaccharide pastes.

The desizing agent for improving the hand feeling of the reactive printed fabric, provided by the invention, is composed of the following raw materials in parts by mass: 20-40 parts of fatty alcohol-polyoxyethylene ether; 5-15 parts of acrylic polymer, 1-3 parts of polyacrylamide, 0.5 part of defoaming agent and 25 parts of deionized water.

The fatty alcohol-polyoxyethylene ether can be a nonionic surfactant of C22-C8, and a polymer synthesized by the addition of ethylene oxide and/or propylene oxide with the addition number of 8-100 (such as C₁₈(EO)₁₂) At least one of;

the acrylic polymer can be one of sodium polyacrylate with molecular weight of 5000-50000 or a propylene-maleic copolymer;

the polyacrylamide can be specifically one of nonionic types, and the molecular weight of the polyacrylamide can be 200-300 ten thousand;

the defoaming agent can be mineral oil or organic silicon, such as BYK-055;

BYK-055 according to the invention was purchased from Bick chemical, Germany;

the fatty alcohol-polyoxyethylene ether, the polyacrylic acid polymer and the polyacrylamide are all commercially available commodities.

According to one embodiment of the invention, the desizing agent consists of the following raw materials in parts by mass: 40 parts of fatty alcohol-polyoxyethylene ether; 5 parts of acrylic polymer, 3 parts of polyacrylamide, 0.5 part of defoaming agent and 30 parts of deionized water.

According to one embodiment of the invention, the desizing agent consists of the following raw materials in parts by mass: 30 parts of fatty alcohol-polyoxyethylene ether; 8 parts of acrylic polymer, 2 parts of polyacrylamide, 0.5 part of defoaming agent and 25 parts of deionized water.

According to one embodiment of the invention, the desizing agent consists of the following raw materials in parts by mass: 35 parts of fatty alcohol-polyoxyethylene ether; 10 parts of acrylic polymer, 1 part of polyacrylamide, 0.5 part of defoaming agent and 25 parts of deionized water.

According to one embodiment of the invention, the desizing agent consists of the following raw materials in parts by mass: 20 parts of fatty alcohol-polyoxyethylene ether; 15 parts of acrylic polymer, 1 part of polyacrylamide, 0.5 part of defoaming agent and 30 parts of deionized water.

The invention also provides a preparation method of the desizing agent for improving the hand feeling of the active printed fabric.

The preparation method of the desizing agent for improving the hand feeling of the active printed fabric, provided by the invention, comprises the following steps:

(1) adding deionized water into a reaction kettle, stirring, adding a defoaming agent, and uniformly stirring;

(2) adding fatty alcohol-polyoxyethylene ether into the reaction kettle, and continuously stirring for 5-10 min;

(3) adding polyacrylamide into the reaction kettle, and continuously stirring for 10-15 min;

(4) adding acrylic polymer into the reaction kettle, and stirring uniformly to obtain the paste removing agent.

The invention also provides application of the desizing agent in preparing cotton active printing paste.

The invention also protects cotton reactive printing paste HL-X100.

The cotton reactive printing paste HL-X100 protected by the invention comprises the cotton reactive printing paste and the desizing agent.

Wherein the dosage of the desizing agent is 9-11% of the mass of the cotton active printing paste.

Specifically, the cotton reactive printing paste is sodium carboxymethylcellulose (degree of substitution of 1.0), and the amount of the desizing agent can be 10%.

Compared with the prior art, the invention has the following beneficial effects:

(1) the desizing agent provided by the invention shields the active reactive group of the paste in the form of the additive, reduces the reactivity of the paste and the dye, is beneficial to improving the color yield of the fabric, reduces the accumulation of the reactant of the dye and the paste on the surface of the fabric, is easy to wash, improves the paste removal rate of the fabric, and improves the hand feeling of the fabric.

(2) The desizing agent provided by the invention is convenient to prepare, simple in use and operation, easy to industrially use and popularize, low in cost, safe and environment-friendly.

Drawings

FIG. 1 is a graph showing the comparison of the paste removal rate under the effect of the paste removal agents with different ratios in examples 1 to 4 of the present invention.

FIG. 2 is a comparison of the color yield of samples prepared by the desizing agents of different ratios in examples 1 to 4 of the present invention.

Detailed Description

The present invention will be further illustrated with reference to the following specific examples, but the present invention is not limited to the following examples. The method is a conventional method unless otherwise specified. The starting materials are commercially available from the open literature unless otherwise specified.

Examples 1-4 Depasts for improving the feel of reactive printed fabrics

The preparation method comprises the following steps:

(1) adding deionized water into a reaction kettle, stirring, adding a defoaming agent, and uniformly stirring;

(2) adding fatty alcohol-polyoxyethylene ether into the reaction kettle, and continuously stirring for 5-10 min;

(3) adding polyacrylamide into the reaction kettle, and continuously stirring for 10-15 min;

(4) adding acrylic polymer into the reaction kettle, and stirring uniformly to obtain the paste removing agent.

Evaluation of Depasting Effect of example 5 and examples 1 to 4

The desizing agents prepared in the examples were tested by sampling according to the following methods:

printing experiment

1. Material distribution: the textile used is pure cotton plain weave fabric which is desized, boiled and bleached

2. Paste preparation:

comparative example: weighing 6g sodium carboxymethylcellulose (degree of substitution of 1.0), 10g carboxymethyl starch (degree of substitution of 0.8), and 8g alginate ester, respectively, adding into corresponding water while stirring, stirring for 20min, and stirring for 40 min.

Example (b): 6g of sodium carboxymethylcellulose (degree of substitution of 1.0), 10g of carboxymethyl starch (degree of substitution of 0.8) and 8g of alginic acid ester are weighed respectively, added into corresponding water while stirring, stirred for 20min, added with 0.6g, 1.0g and 0.8g of paste removed in example corresponding to 10% of paste, and stirred for 40 min.

3. Printing formula:

name (R)	Printing prescription	Printing prescription	Printing prescription
				Active emerald SPEH	5％	5％	5％
Anti-dyeing salt	3％	3％	3％
				Urea	5％	5％	5％
Baking soda	3％	3％	3％
				Water (W)	54％	34％	44％
Paste material	Sodium carboxymethylcellulose 30%	50 percent of carboxymethyl starch	Alginic acid ester 4%
				Total of	100％	100％	100％

4. Printing process

Paste making → flat screen printing (screen 120 mesh, magnetic rod pressure 35, vehicle speed 25) → drying (100-.

5. Index testing

5.1 Depasting Rate test

The paste removal rate is one of important indexes for representing the hand feeling of printed fabricsThe paste removal rate is not only related to the printing process, but also depends on the characteristics of the paste, the printed fabric with high paste removal rate is soft to touch, and the paste removal rate is expressed as (m) =₂-m₃)/(m₂-m₁) Calculating the rate of paste removal by 100%, wherein m₁、m₂、m₃The dry weight/g of the fabric before printing, after printing and after soaping are respectively.

5.2 apparent color yield test

Using colorimeters at D₆₅Respectively testing the color depth (K/S) of the front surface of the printed fabric under the conditions of a light source and a standard of 10 DEG_{Is just}) The larger the K/S value, the deeper the apparent color yield.

By the above tests, the paste removal rate of the samples prepared in examples 1-4 is shown in FIG. 1, and the color yield of the samples prepared in examples 1-4 is shown in FIG. 2.

As can be seen from figure 1, after the desizing agents of the examples 1 to 4 are added, the paste removing rate of the sodium carboxymethyl cellulose reaches over 90 percent, which is obviously higher than 80 percent of the paste removing rate of the comparative example, and the prepared fabric has soft hand feeling. FIG. 2 shows that the fabric color yield of the examples can be improved by 5% -10% compared with the comparative examples, which shows that the desizing agent has better active group shielding performance on the paste, and the effective concentration of the dye is increased under the effect of the desizing agent, so that the dye uptake is improved.

The present invention is not limited to the above-mentioned alternative embodiments, and any modifications, substitutions, improvements, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.