A water-based ink with high color fastness applied to PVC printing

Abstract

The invention relates to high-color-fastness water-based ink for PVC (polyvinyl chloride) printing. The ink is prepared from the following components in parts by mass: 35-45 parts of a water-based acrylic resin emulsion, 7-14 parts of pigment, 2-4 parts of ammonia water, 1-2 parts of a defoaming agent and 4-7 parts of an auxiliary agent, wherein the pigment is modified pigment. A modification method of the modified pigment comprises steps as follows: mixing ordinary pigment, molybdenum disulfide powder and ethanol, and adding the mixture to a stirring container for stirring for 15-25 minutes; then adding sodium 3-sulfobenzoate, and stirring the mixture uniformly to obtain a microemulsion; adding a mixed solution of water, ethanol and a silane coupling agent to a high-pressure atomizing spray gun so as to uniformly spray the mixed solution into the stirring microemulsion in an atomized manner, and stirring the microemulsion continuously; finally, drying the microemulsion to obtain the modified pigment. The high-color-fastness water-based ink for PVC printing has the characteristics of small contact angle, good wettability, high light fastness and good dispersion property.

Description

technical field [0001] The invention relates to a water-based ink with high color fastness applied to PVC printing, which belongs to the technical field of water-based ink. Background technique [0002] Water-based ink has some characteristics different from other inks due to its own water solvent characteristics, and has the following advantages: [0003] 1. Green and environmental protection. Water-based ink does not use organic volatile solvents and contains almost no volatile organic compounds (VOC). This greatly improves the ink manufacturing and printing operation environment, and ensures the health of operators and end product users. [0004] 2. Printing characteristics. Water-based ink is relatively stable, and it is not easy to corrode the plate roller. The plate roller is easy to clean after printing, and it is suitable for most printing methods. [0005] 3. Security. Water-based ink does not contain organic solvents, the water-based system is relatively stabl...

AI Technical Summary

Problems solved by technology

[0008] 2. Adhesion problem

Especially when applied to plastic substrates, it is more prone to poor adhesion

[0009] 3. Surface effect problem

It still has defects such as poor adhesion, poor color fastness to light, slow drying, dark shadows in printing, poor layered printing, poor gloss, and easy to appear small white spots, which make it unable to be widely used