Preparation method of reactive dye printing paste for printing fine patterns

A printing paste and reactive dye technology, applied in the textile field, can solve the problems of poor rheology and permeability of sodium alginate paste, edge bleeding, poor hand feeling, etc., achieve good rheology and permeability, increase added value, Improvement of screen penetration and depaste rate

Inactive Publication Date: 2012-07-25
XI'AN POLYTECHNIC UNIVERSITY
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of reactive dye printing paste for printing fine patterns, which solves the problem of poor rheology and permeability of existing sodium alginate paste, and can avoid the problem of poor rheology and permeability during the printing process. , especially in high-mesh printing, fine patterns, large-area printing and fabric printing with tight texture, there are problems of network blocking, edge bleeding and poor hand feeling

Method used

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  • Preparation method of reactive dye printing paste for printing fine patterns
  • Preparation method of reactive dye printing paste for printing fine patterns
  • Preparation method of reactive dye printing paste for printing fine patterns

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Experimental program
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Embodiment

[0022] In the experiment, we changed the reaction temperature, the dosage of cross-linking agent epichlorohydrin, the reaction time, and the pH value, and designed an orthogonal experiment. The results are shown in Table 1.

[0023] Table 1 L of sodium alginate modification condition 9 (3 4 ) Orthogonal experimental results

[0024]

[0025] Table 1 shows that the reaction time has the greatest impact on modified sodium alginate; the optimal reaction time between epichlorohydrin and sodium alginate is 1.5h. During the reaction process, the epoxy compound reacts with water at the same time, and there is a competing reaction between the crosslinking reaction and the hydrolysis of the epoxy compound. With the prolongation of the reaction time, the hydrolysis reaction intensifies, resulting in a decrease in the viscosity of the crosslinked alginic acid paste.

[0026] Sodium alginate solution is easily converted into alginic acid in acidic solution at pH, forming a gel to pre...

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Abstract

The invention discloses a preparation method of a reactive dye printing paste for printing fine patterns. The preparation method comprises the following steps: firstly preparing sodium alginate paste with a mass concentration of 3% at a room temperature as a crude paste, and standing for 24 hours; secondly adding sodium hydroxide solution with a mass concentration of 2% into the crude paste under fully mixing at a normal temperature to dissolve the crude paste in the sodium hydroxide solution to produce sodium carboxylate, increasing the temperature while adding epoxy chloropropane with a mass 3-7% of the crude paste, and allowing cross-linking between epoxy chloropropane and alcoholic hydroxyl groups in the sodium carboxylate molecule to form ether bonds so as to prepare cross-linked sodium alginate; and finally adding hydrochloric acid with a mass concentration of 2% in cross-linked sodium alginate under mixing for neutralization, adding absolute ethanol until floccules appear, using a high-speed centrifuge to precipitate the floccules, and drying the precipitate and grinding into powder to obtain the printing paste. The preparation method provided by the invention solves the problems of poor rheological property and permeability of the sodium alginate paste in prior arts.

Description

technical field [0001] The invention belongs to the technical field of textiles, and relates to a preparation method of a printing paste, in particular to a preparation method of a reactive dye printing paste used for printing fine patterns. Background technique [0002] The sodium alginate paste used for reactive dye printing has poor rheology and permeability, and it is prone to blockage and edge in the printing process, especially in high-mesh printing, fine pattern, large-area printing and tight fabric printing. Infiltration and other problems, resulting in the inability to increase the added value of the product. In order to seek a paste that can replace sodium alginate, increase the viscosity of the paste, reduce the PVI index, and make it have better rheology and thixotropy, most researchers are working on starch derivatives, cellulose derivatives substances, guar gum derivatives, and synthetic pastes. Wang Chunlan and others partially esterified alginic acid to mak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P1/48D06P1/38C08B37/14
Inventor 谭艳君刘昌南洪俊金
Owner XI'AN POLYTECHNIC UNIVERSITY
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