阅读说明：本技术 一种纤维素纤维面料的数码印花工艺 (Digital printing process of cellulose fiber fabric ) 是由 李田田 房宽峻 侯凯文 孙付运 林凯 范全成 房磊 沈允涛 张迁迁 王圣然 于 2020-07-07 设计创作，主要内容包括：本发明提供了一种纤维素纤维面料的数码印花工艺,包括以下步骤：将纤维素纤维面料依次进行预处理改性、水洗、烘干、数码印花喷印、烘干、蒸化和后处理；所述预处理改性的改性剂为阳离子改性剂；所述后处理的助剂剂为阴离子助剂。本发明提供的方法不需增稠剂类上浆剂上浆,印花后可减少水洗流程或不水洗,降低了污水处理成本,可以真正做到污水零色度,同时防止数码印花白底沾色。(The invention provides a digital printing process of a cellulose fiber fabric, which comprises the following steps: sequentially carrying out pretreatment modification, washing, drying, digital printing and jet printing, drying, steaming and post-treatment on the cellulose fiber fabric; the modifying agent for pretreatment modification is a cationic modifying agent; the post-treatment auxiliary agent is an anionic auxiliary agent. The method provided by the invention does not need a thickening agent sizing agent for sizing, can reduce the washing process or not wash after printing, reduces the sewage treatment cost, can really realize zero chroma of sewage, and simultaneously prevents the white bottom of digital printing from staining.)

1. A digital printing process of a cellulose fiber fabric is characterized by comprising the following steps:

sequentially carrying out pretreatment modification, washing, drying, digital printing and jet printing, drying, steaming and post-treatment on the cellulose fiber fabric;

the modifying agent for pretreatment modification is a cationic modifying agent;

the auxiliary agent used for the post-treatment is an anionic auxiliary agent.

2. The digital printing process according to claim 1, wherein the cationic modifier is one or more of a quaternary ammonium salt modifier and an ammonium chloride modifier.

3. The digital printing process according to claim 1, wherein the pretreatment modification method comprises method 1, method 2 or method 3;

the method 1 comprises the following steps:

padding cellulose fiber fabric with a cationic modifier with a liquid carrying rate of 70-80%, drying and baking;

the method 2 comprises the following steps:

padding a cationic modifier into the cellulose fiber fabric, wherein the liquid carrying rate is 70-80%, and stacking at room temperature;

the method 3 comprises the following steps:

padding the cellulose fiber fabric with a cationic modifier with a liquid carrying rate of 70-80%, drying and steaming.

4. The digital printing process according to claim 3, wherein in the method 1, the drying temperature is 80-100 ℃, the baking temperature is 120-150 ℃, and the baking time is 1-3 min;

in the method 2, the drying temperature is 80-100 ℃, the steaming temperature is 100-103 ℃, and the steaming time is 5-10 min.

5. The digital printing process according to claim 1, wherein the step of washing with water is: sequentially comprises room temperature water washing, hot water washing, room temperature water washing, acid solution neutralization water washing and room temperature water washing.

6. The digital printing process according to claim 4, wherein the acid solution in the acid solution neutralization and water washing is selected from one or more of citric acid aqueous solution, acetic acid and hydrochloric acid.

7. The digital printing process according to claim 1, wherein the anion auxiliary agent is selected from one or more of carboxylate anion auxiliary agent and sulfonate anion auxiliary agent.

8. The digital printing process according to claim 1, wherein the post-treatment comprises the following steps: padding or spraying an anionic assistant, and drying.

9. The digital printing process according to claim 8, wherein the drying temperature is 80-100 ℃.

Technical Field

The invention belongs to the technical field of printing prevention, and particularly relates to a digital printing process of a cellulose fiber fabric.

Background

The digital printing has the characteristics of no need of screen making, low energy consumption, no waste and high precision, and can adapt to the market of individuation, small batch and quick delivery. The digital printing ink has high cost, the fixation rate of the reactive dye ink is about 70 percent, a large amount of reactive dye is wasted, and the sewage chroma is increased, so that the sewage treatment is difficult.

Chinese patent CN 108589347A discloses a finishing method for reactive dye ink-jet printing based on cationic modifier ink, which comprises the steps of spray-printing the cationic modifier ink and the reactive dye ink in a cellulose fiber fabric pattern area subjected to sizing treatment by an ink-jet printing process, steaming or baking, and finally soaping to obtain a reactive dye ink-jet printed fabric; the interval time between the jet printing of the cationic modifier ink and the jet printing of the reactive dye ink is 0-2 min; the cationic modifier ink is ink containing 1.0-60.0 wt% of cationic modifier; the cationic modifier is a molecule with the molecular structure containing a reactive group and a positive charge group and the number average molecular weight of 100-30000, wherein the reactive group is one or more of epoxy group, s-triazine, pyridine and olefin, and the positive charge group comprises one or more of quaternary ammonium salt and ammonium chloride structure. The cationic modification of translation articles such as Sunwbo and the like has influence on the ink-jet printing performance of cotton fabrics, and after the cationic modification, the digital printing sizing agent is padded and then digital printing is carried out, so that the color depth and the resolution of the fabrics can be improved.

The method or local modification only increases the color depth of the patterns of the digital printing part, or sizing pretreatment is needed after modification, thus increasing the cost.

Disclosure of Invention

In view of the above, the technical problem to be solved by the present invention is to provide a digital printing process for cellulose fiber fabric, which does not need to be sized after pretreatment, reduces the process flow, does not need to be washed after printing, and reduces the sewage treatment cost.

The invention provides a digital printing process of a cellulose fiber fabric, which comprises the following steps:

sequentially carrying out pretreatment modification, washing, drying, digital printing and jet printing, drying, steaming and post-treatment on the cellulose fiber fabric;

the modifying agent for pretreatment modification is a cationic modifying agent;

the auxiliary agent used for the post-treatment is an anionic auxiliary agent.

Preferably, the cationic modifier is one or more of a quaternary ammonium salt modifier and an ammonium chloride modifier.

Preferably, the method of pretreatment modification comprises method 1, method 2 or method 3;

the method 1 comprises the following steps:

padding cellulose fiber fabric with a cationic modifier with a liquid carrying rate of 70-80%, drying and baking;

the method 2 comprises the following steps:

padding a cationic modifier into the cellulose fiber fabric, wherein the liquid carrying rate is 70-80%, and stacking at room temperature;

the method 3 comprises the following steps:

padding the cellulose fiber fabric with a cationic modifier with a liquid carrying rate of 70-80%, drying and steaming.

Preferably, in the method 1, the drying temperature is 80-100 ℃, the baking temperature is 120-150 ℃, and the baking time is 1-3 min;

in the method 2, the drying temperature is 80-100 ℃, the steaming temperature is 100-103 ℃, and the steaming time is 5-10 min.

Preferably, the step of washing with water is: sequentially comprises room temperature water washing, hot water washing, room temperature water washing, acid solution neutralization water washing and room temperature water washing.

Preferably, the acid solution is selected from one or more of citric acid aqueous solution, acetic acid and hydrochloric acid.

Preferably, the anionic assistant is selected from one or more of carboxylate anionic assistant and sulfonate anionic assistant.

Preferably, the post-treatment step is: padding or spraying an anionic assistant, and drying.

Preferably, the drying temperature is 80-100 ℃.

Compared with the prior art, the invention provides a digital printing process of a cellulose fiber fabric, which comprises the following steps: sequentially carrying out pretreatment modification, washing, drying, digital printing and jet printing, drying, steaming and post-treatment on the cellulose fiber fabric; the modifying agent for pretreatment modification is a cationic modifying agent; the post-treatment auxiliary agent is an anionic auxiliary agent. The method provided by the invention does not need a thickening agent sizing agent for sizing, can reduce the washing process or not wash after printing, reduces the sewage treatment cost, can really realize zero chroma of sewage, and simultaneously prevents the white bottom of digital printing from staining.

Detailed Description

The invention provides a digital printing process of a cellulose fiber fabric, which comprises the following steps:

sequentially carrying out pretreatment modification, washing, drying, digital printing and jet printing, drying, steaming and post-treatment on the cellulose fiber fabric;

the modifying agent for pretreatment modification is a cationic modifying agent;

the assistant for post-treatment is an anionic assistant.

The invention carries out digital printing on the surface of the cellulose fiber fabric, and firstly carries out pretreatment modification on the cellulose fiber fabric in sequence.

Wherein the modifying agent modified by pretreatment is a cationic modifying agent; preferably, the cationic modifier is one or more of a quaternary ammonium salt modifier and an ammonium chloride modifier.

In some embodiments of the invention, the cationic modifier is selected from the group consisting of 3-chloro-2-hydroxypropyltrimethylammonium chloride, epoxypropyltrimethylammonium chloride, and 3-acrylamido-2-hydroxypropyltrimethylammonium chloride.

The cation modifier is in the form of an alkaline aqueous solution of the cation modifier, wherein the alkaline aqueous solution of the cation modifier is a mixture of an aqueous solution of the cation modifier and an aqueous solution of an alkaline agent, the concentration of the cation modifier in the aqueous solution of the cation modifier is 60-300 g/L, and the concentration of the alkaline agent in the aqueous solution of the alkaline agent is 10-60 g/L. The alkaline agent is one or more of sodium hydroxide or sodium carbonate. The volume ratio of the mixed aqueous solution of the cationic modifier and the aqueous solution of the alkaline agent is 1:1-2: 1.

Specifically, the pretreatment modification method includes method 1, method 2 or method 3;

the method 1 comprises the following steps:

padding the cellulose fiber fabric with a cationic modifier with a liquid carrying rate of 70-80%, drying and baking.

Wherein the drying temperature is 80-100 ℃, and preferably 85-95 ℃; the baking temperature is 120-150 ℃, preferably 130-140 ℃, and the baking time is 1-3 min.

The method 2 comprises the following steps:

padding a cationic modifier into the cellulose fiber fabric, wherein the liquid carrying rate is 70-80%, and stacking at room temperature;

in the present invention, the room temperature is defined as 25 ± 5 ℃.

The method 3 comprises the following steps:

padding the cellulose fiber fabric with a cationic modifier with a liquid carrying rate of 70-80%, drying and steaming.

The drying temperature is 80-100 ℃, and preferably 85-95 ℃; the steaming temperature is 100-103 ℃, and the steaming time is 5-10 min.

Washing the cellulose fiber fabric subjected to pretreatment modification with water, wherein the washing step is as follows: sequentially comprises room temperature water washing, hot water washing, room temperature water washing, acid solution neutralization water washing and room temperature water washing.

In the present invention, the temperature of the water used for the room temperature water washing is 25 ± 5 ℃;

the temperature of hot water used for hot water washing is 80-98 ℃;

the temperature of the acid solution for neutralizing and washing the acid solution in the water washing is room temperature, the acid solution in the acid solution neutralizing and washing the water washing is selected from one or more of citric acid aqueous solution, acetic acid and hydrochloric acid, and citric acid is preferred.

And neutralizing the acid solution and washing the acid solution with water until the acid solution is nearly neutral, wherein the pH value is 6-8.

And (5) drying after water is carried out to obtain the pretreated cellulose fiber fabric. Wherein the drying temperature is 80-120 ℃.

Then, digital printing and jet printing are carried out on the pretreated cellulose fiber fabric, and the jet printing method is not particularly limited by the invention, and can be a method known by the technicians in the field.

And drying and steaming after the digital printing and jet printing.

Wherein the drying temperature is 80-100 ℃, the steaming temperature is 100-103 ℃, and the time is 7-15 min.

And finally, carrying out post-treatment, wherein the auxiliary agent used in the post-treatment is an anionic auxiliary agent. The anion auxiliary agent is selected from one or more of carboxylate anion auxiliary agent and sulfonate anion auxiliary agent.

In some embodiments of the invention, the anionic adjuvant is selected from sodium polystyrene sulfonate.

The anionic aid is in the form of an aqueous solution of the anionic aid. The concentration of the anionic assistant in the aqueous solution of the anionic assistant is 60 g/L-200 g/L.

The post-treatment method comprises the following steps: padding or spraying an anion assistant, drying, and washing with water at room temperature.

Wherein the concentration of the padding or spraying anionic assistant is 60-200 g/L, and the liquid carrying amount is 70-90%.

The drying temperature is 80-120 ℃.

The method provided by the invention does not need a thickening agent sizing agent for sizing, reduces the washing process flow after printing or does not need washing, reduces the sewage treatment cost, can really realize zero chroma of sewage, and simultaneously prevents the white bottom of digital printing from staining.

For further understanding of the present invention, the digital printing process of the cellulose fiber fabric provided by the present invention is described below with reference to the following examples, and the scope of the present invention is not limited by the following examples.