阅读说明：本技术 一种潮湿状态纺织品数码印花的方法 (Digital printing method for textile in wet state ) 是由 孙付运 房宽峻 侯长华 沈允涛 李田田 钱翠香 齐乐乐 刘曰兴 于 2020-05-27 设计创作，主要内容包括：本发明属于纺织品数码印花技术领域,尤其涉及一种潮湿状态纺织品数码印花的方法,包括以下工艺步骤：预处理工作液的制备；刮浆处理,将预处理工作液均匀刮浆在干燥纺织品上；印花处理,将刮浆处理后的潮湿纺织品不进行烘干操作,直接进行数码打印,烘干,蒸化,水洗即可。本发明可解决现有技术中使用拉幅定型机进行预处理造成的纬斜、泛黄、预处理液和能源浪费等问题,并且使用该方法的数码印花产品颜色饱满、鲜艳。(The invention belongs to the technical field of digital printing of textiles, and particularly relates to a digital printing method of a textile in a wet state, which comprises the following process steps: preparing a pretreatment working solution; performing scraping treatment, namely uniformly scraping the pretreatment working solution on the dry textile; and printing, namely directly performing digital printing, drying, steaming and washing on the wet textile subjected to the pulp scraping treatment without drying. The invention can solve the problems of skewness of weft, yellowing, pretreatment liquid waste, energy waste and the like caused by pretreatment by using the tentering setting machine in the prior art, and the digital printing product using the method has full and bright color.)

1. A method for digitally printing textiles in a wet state is characterized by comprising the following process steps:

(1) preparing a pretreatment working solution;

(2) and (3) pulp scraping treatment: uniformly scraping the pretreatment working solution on the dry textile;

(3) printing treatment: and (3) directly performing digital printing, drying, steaming and washing on the wet textile subjected to the pulp scraping treatment in the step (2) without drying.

2. A method of digitally printing textiles in a wet state according to claim 1, characterised in that said pretreatment liquor comprises the following components in parts by weight: 1-5 parts of thickening agent, 1-4 parts of baking soda, 5-20 parts of urea, 0.5-2 parts of dye-resistant salt S, 0.1-1 part of sodium metasilicate and the balance of water.

3. A method of digitally printing textiles in a wet state as claimed in claim 2 characterised in that said thickening agent is one or more of sodium alginate, alginate esters, methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, starch, modified starch, polyacrylates, polyacrylamides.

4. The method for digital printing textiles in a wet state as claimed in claim 2, wherein the viscosity of the pretreatment working fluid is 500-10000 mPa-s and the pH is 8-10.

5. A method of digitally printing textiles in a wet state according to claim 2, characterised in that the preparation of said pretreatment liquor comprises:

(1) adding urea, sodium bicarbonate, anti-staining salt S and sodium metasilicate into water, stirring and dissolving to obtain a uniform mixed solution;

(2) and continuously stirring the mixed solution, slowly adding a thickening agent, continuously stirring for 0.5-2h, and standing for 1-3 h to obtain the pretreatment working solution.

6. A method of digitally printing textiles in a wet state according to claim 1, characterised in that the specific process of the doctor blade treatment is: using a screen plate with the mesh number of 80-100 to carry out pulp scraping treatment on the dry textile by using the pretreatment working solution, wherein the pulp scraping pressure is 1mV-5mV, and the pulp scraping speed is 10-50mm/s, uniformly conveying the pretreatment solution to the screen plate, and uniformly scraping the pretreatment solution on the textile.

7. A method of digitally printing textiles in a wet state according to claim 6 characterised in that the pre-treatment liquor is evenly doctored on the textile front side.

8. A method of digitally printing textiles in the wet state as claimed in claim 6 characterised in that the wet pick up of the textiles after the size removal treatment is between 30% and 50%.

Technical Field

The invention belongs to the technical field of digital printing of textiles, and particularly relates to a digital printing method for textiles in a wet state.

Background

In recent years, digital printing technology is rapidly developed to meet the market demands of small batch, diversified variety and rapid delivery of printing orders. In order to obtain a better printing effect, the digital printing of the textile needs to be carried out pretreatment on the textile before printing, otherwise, the defects of chromatic aberration, poor fineness, non-bright color and the like of the printing can occur.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a digital printing method for textiles in a wet state, which can solve the problems of oblique weft and easy yellowing of grey cloth, serious waste of pretreatment liquid and energy and the like caused by a pretreatment mode in the prior art, and digital printing products using the method are full and bright in color.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for digitally printing textiles in a wet state comprises the following process steps:

(1) preparing a pretreatment working solution;

(2) and (3) pulp scraping treatment: uniformly scraping the pretreatment working solution on the dry textile;

(3) printing treatment: and (3) directly performing digital printing, drying, steaming and washing on the wet textile subjected to the pulp scraping treatment in the step (2) without drying.

Compared with the method for padding the treatment liquid by the tentering setting machine commonly used in the prior art, the method for scraping the size can effectively avoid the problems of skewness, yellowing and the like of the gray fabric, in addition, the method only carries out single-side scraping size treatment, and compared with the method for pretreating all the padding pretreatment liquid of the gray fabric in the prior art, the method can effectively save the pretreatment liquid, avoid energy waste and greatly reduce the production cost. Secondly, in the method, after the textile is pretreated, the digital printing is directly carried out in a wet state without drying treatment. Compared with the method in the prior art, the method reduces the process steps of drying and rolling after padding treatment fluid, on one hand, the problems of yellowing of grey cloth and the like caused by drying treatment can be effectively avoided, and on the other hand, the production cost is greatly saved.

Preferably, the pretreatment working solution comprises the following components in parts by weight: 1-5 parts of thickening agent, 1-4 parts of baking soda, 5-20 parts of urea, 0.5-2 parts of dye-resistant salt S, 0.1-1 part of sodium metasilicate and the balance of water. The dosage of the thickening agent, the baking soda, the urea and the like needs to be adjusted according to the type of the textile, for example, the type of the textile is a pure spinning or blended fabric composed of cotton, terylene, tencel and the like. The prepared pretreatment working solution has a good color fixing effect on textiles, so that the produced digital printing products are full and bright in color and good in color fastness.

Preferably, the thickener is one or more of sodium alginate, alginate ester, methyl cellulose, carboxymethyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, methyl hydroxyethyl cellulose, starch, modified starch, polyacrylate and polyacrylamide.

Preferably, the viscosity of the pretreatment working fluid is 500-10000 mPa.s, and the pH value is 8-10.

Preferably, the preparation step of the pretreatment working solution comprises the following steps:

(1) adding urea, sodium bicarbonate, anti-staining salt S and sodium metasilicate into water, stirring and dissolving to obtain a uniform mixed solution;

(2) and continuously stirring the mixed solution, slowly adding a thickening agent, continuously stirring for 0.5-2h, and standing for 1-3 h to obtain the pretreatment working solution.

Preferably, the specific process of the pulp scraping treatment comprises the following steps: using a screen plate with the mesh number of 80-100 to carry out pulp scraping treatment on the dry textile by using the pretreatment working solution, wherein the pulp scraping pressure is 1mV-5mV, and the pulp scraping speed is 10-50mm/s, uniformly conveying the pretreatment solution to the screen plate, and uniformly scraping the pretreatment solution on the textile.

Preferably, the pretreatment liquor is evenly doctored onto the textile face. The digital printing is single-sided printing, only single-sided sizing is needed, the single-sided pulp scraping treatment is only carried out, and compared with the method for pretreating all the padding pretreatment liquid of the gray fabric in the prior art, the method can effectively save the pretreatment liquid, avoid energy waste and greatly reduce the production cost.

Preferably, the wet pick rate of the textile after the size scraping treatment is 30-50%.

Advantageous effects

The invention discloses a method for digital printing of textiles in a wet state, which comprises the steps of firstly carrying out single-side pulp scraping treatment on the textiles by using a specially prepared pretreatment liquid of the invention, and compared with a method for padding the treatment liquid of a tentering setting machine in the prior art, the method for scraping the pulp can effectively avoid the problems of skewness, yellowing and the like of grey cloth caused by the tentering setting machine.

Secondly, in the method, after the textile is pretreated, the digital printing is directly carried out in a wet state without drying treatment. Compared with the method in the prior art, the method reduces the process steps of drying and rolling after padding treatment liquid, on one hand, the problems of yellowing of grey cloth and the like caused by drying treatment can be effectively avoided, on the other hand, the production cost is greatly saved, and the digital printing product using the method has full and bright color.

In conclusion, the method for digitally printing the textile in the wet state can solve the problems of oblique weft and easy yellowing of grey cloth, serious waste of pretreatment liquid and energy and the like caused by a pretreatment mode in the prior art, can effectively save the pretreatment liquid, avoid energy waste and greatly reduce the production cost, and digital printing products using the method are full and bright in color. Therefore, the invention has outstanding substantive features and obvious progress.

Detailed Description

Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in the present specification and the appended claims should not be construed as limited to general and dictionary meanings, but interpreted based on the meanings and concepts corresponding to technical aspects of the present invention on the basis of the principle that the inventor is allowed to define terms appropriately for the best explanation. Accordingly, the description proposed herein is just a preferable example for the purpose of illustrations only, not intended to limit the scope of the invention, so it should be understood that other equivalents and modifications could be made thereto without departing from the spirit and scope of the invention.

The following examples are given by way of illustration of embodiments of the invention and are not to be construed as limiting the invention, and it will be understood by those skilled in the art that modifications may be made without departing from the spirit and scope of the invention. Unless otherwise specified, reagents and equipment used in the following examples are commercially available products.

The fabric color index test refers to "color science and computer color measuring and matching practical technology" Xue dynasty Beijing of China: chemical T publishers, 2004, 62-63.

The color fastness to rubbing of the fabric is determined with reference to GB/T3920-. The color fastness to washing refers to GB/T3921.1-1997 color fastness to washing of textile color test: test 1 ″.