Preparation method of reactive dye printing paste for printing fine patterns

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...

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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

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