Waterproof dye-based ink for ink-jet printing and preparation method thereof

Abstract

The invention provides waterproof dye-based ink for ink-jet printing and a preparation method thereof. The waterproof dye-based ink for ink-jet printing is characterized by containing the following components according to mass percent: 5-20 percent of water soluble dye, 0.3-0.6 percent of modified polyurethane resin, 10-40 percent of acrylic resin, 3-5 percent of humectant, 0.1-1 percent of non-ionic surface active agent, 5-10 percent of diethylene glycol, 0.1-0.5 percent of preservative, 0.1-1 percent of pH modifiers and 30-70 percent of water. The waterproof dye-based ink for ink-jet printing and the preparation method thereof belong to the technical field of printing supplies; the waterproof dye-based ink has good waterproof, light resistant, scratching resistant and stability properties, and is low in production cost and good in environment benefit.

Description

technical field [0001] The invention belongs to the technical field of printing consumables, and in particular relates to a waterproof dye ink for inkjet printing and a preparation method thereof. Background technique [0002] With the increasing popularity of inkjet printers, inkjet printers are accepted by more and more consumers. Ink is an important part of inkjet printing materials, and its quality and performance are closely related to printing effects. [0003] The inks used in inkjet printers are roughly divided into two categories, dye inks and pigment inks. Dye ink exists at the water-soluble molecular level, so the printed proofs have good color expressiveness, but they will dissolve again when exposed to water, resulting in scattered ink and ink dropouts on the printed proofs. Pigment ink exists in the form of solid particles, and the printed proofs will not mix with water when they encounter water, but there are problems such as poor color performance of the pr...

AI Technical Summary

Problems solved by technology

Dye ink exists at the water-soluble molecular level, so the printed proofs have good color expression, but they will dissolve again when exposed to water, resulting in scattered ink and ink dropouts on the printed proofs

Pigment ink exists in the form of solid particles, and the printed proofs will not mix with water when they encounter water, but there are problems such as poor color performance of the printed proofs, complicated preparation process and high composition

[0004] Chinese patent application 201310024200.6 discloses an inkjet ink, which uses high weather resistance dyes, modified polyurethane resin emulsions and ultraviolet absorbers as raw materials, has good water resistance, etc., but has poor long-term stability and high Weather-resistant dyes are more expensive, which in turn leads to higher ink costs

The patent application also pointed out: the selection of high weather resistance dyes can improve the light resistance of dye inkjet inks, thereby prolonging the use time of inks; adding anti-ultraviolet agents can also improve the light resistance of inks; modified polyurethane resin emulsions can be compounded with modified Non-toxic acrylic resin emulsion; the addition amount of modified polyurethane resin emulsion is 1-13%, preferably 3-10%. It works well, but adding too much will bring difficulties to ink storage stability and printing fluency

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