Waterbased pigment type ink-jet printing ink and preparation method and application thereof

Abstract

The invention relates to waterbased pigment type ink-jet printing ink and a preparation method and application thereof. The ink comprises the following components by weight percent: 5.0-25.0% of pigment paste, 0.2-2.0% of surfactant, 2.0-15.0% of fabric adhesive, 5.0-35.0% of moisturizer, 0.5-3.0% of pH regulator, 0.1-0.5% of antibacterial agent and the balance of deionized water. The preparationmethod is as follows: mixing and stirring the components and filtering. The application method comprises the following steps: the waterbased pigment type ink-jet printing inks with four basic colors are respectively filled in the ink boxes of an ink-jet printing machine, a computer is used to print the required colors and patterns on fabric, and then the fabric is baked for fixation. The ink-jet printing ink has good storage stability and printing fluency and high washing fastness and rubbing fastness; and the preparation method and application method have simple processes and good application prospects.

Description

technical field [0001] The invention belongs to the field of inkjet printing inks, in particular to a water-based pigment inkjet printing ink and its preparation method and application. Background technique [0002] Due to the complex and lengthy operation process of traditional screen and rotary screen printing, and cannot meet the requirements of high quality, small batches, diversified patterns, and individualization, digital printing technology gets rid of the simulation of traditional printing color separation, film production, and net making. The method has the obvious advantages of convenient operation, no pollution and high return, which brings unprecedented development opportunities to the textile printing and dyeing industry. Digital inkjet printing is to input the required printing pattern into the computer in digital form, after editing and processing the computerized printing color separation and drawing, and then directly spray the printing ink onto various fab...

AI Technical Summary

Problems solved by technology

Digital printing ink is an important consumable for digital printing. The performance of digital printing ink directly affects the quality of printing. At present, the ink used for fabric digital printing is mainly based on dye ink, but there are many shortcomings in the use of dye ink for fabric digital printing:( 1) Dye inks are not universal, different fabrics require different types of dye inks to meet printing requirements

In addition, pigment-based inkjet printing ink saves water and electricity because it does not require fabric pretreatment and post-washing process, the manufacturing process is simple, and the production cost can be reduced. Therefore, the advantages of pigment-based inkjet printing ink for fabric inkjet printing are obvious. Yes, but the problem that this technology has not yet solved is: no suitable fabric adhesive can be found, which leads to low washing fastness and insufficient dry rubbing fastness of inkjet printing products

At present, adding polyacrylic acid emulsion and polyurethane emulsion to the water-based pigment inkjet printing ink as a binder to improve the adhesion of pigment particles and fabrics is rare, especially the report of using polyurethane emulsion as binder is almost non-existent.

[0005] The most representative patents are US7338988 and US70301175 when polyacrylate emulsion is added to water-based pigment-based inkjet ink abroad. However, the inkjet inks in these patents are mainly aimed at the coloring of plastic materials such as PE, PVC, and PU. Dry rubbing fastness and washing fastness are not ideal

Fang Kuanjun and others in China have done a lot of exploration work on water-based pigment-based inkjet printing inks. The polycarboxylic acid-type copolymers in patents CN200510040114. However, from the point of view of hyperdispersants, polycarboxylate copolymers are easy to reunite pigments dispersed by polycarboxylate copolymers due to the lack of single-point or multi-point anchoring groups in the macromolecular chain and the absence of solvated chains. ; From the perspective of fabric adhesives, polycarboxylic acid copolymers can chemically react with cellulose fabrics, but have almost no reaction with polyester, nylon and other chemical fiber fabrics, so the bonding effect is not enough

Patent CN200710024154.4 adds cross-linking agent to pigment-based inkjet printing ink to improve dry and wet rubbing fastness, but the effect is still unsatisfactory. Wet rubbing fastness is only 2-3 grades, and dry rubbing fastness is 3-4 class

In fact, if there is a cross-linking agent in the pigment-based inkjet printing ink, the ink will undergo a cross-linking reaction during transportation or storage, resulting in a decrease in the storage stability of the ink and a decrease in printing fluency.

Patent 200410013291.4 uses a self-crosslinking acrylic resin as a fabric adhesive. In the same way, the ink will also undergo crosslinking reactions during transportation or storage, resulting in increased ink viscosity, reduced storage stability and printing performance.