Waterproof type neutral ink with pigment in Nano level for pen, and preparation method

Abstract

This invention provides a method for producing nanoscale pigment waterproof neutral pen ink, which comprises: nanoscale stock solution 40 wt. %, thickener 40-50 wt. %, and diluter 10-20 wt. %. The average particle size of the pigment is 100-200 nm. The method comprises: adding nanoscale stock solution into a blending pot, adding diluter under stirring, stirring for another 30-90 min, adding thickener, then stirring for 1-3 h, terminating stirring, and discharging. The ink has such advantages as good color, stable quality, fluent writing, high fatigue resistance, no demixing, separation or precipitation after a long-time storage, high solarization resistance, high waterproof performance, no toxicity, high production and usage safety, and no pollution. The ink can be widely used for metal ballpoint pen, polypropylene pen and plastic pen.

Description

technical field [0001] The invention relates to a gel pen ink, in particular to a nanoscale pigment waterproof gel pen ink and a manufacturing method thereof, belonging to the technical field of ink. Background technique [0002] At present, the high-grade special pen ink sold in the domestic and foreign markets has changed from dye type to pigment type. Compared with the dye type, a nano-scale pigment gel pen ink can effectively solve the problems of fading and bleeding, but the pigment type gel pen ink produced by the ordinary production process and formula has a large particle size, which affects Its permeability prolongs the drying time, and there will be plugging, disconnection, uneven ink output and other phenomena. [0003] Pigment-based inks are colored by dispersing fine particles of pigments in the medium used. The ideal dispersion system should have a "primary (primary) particle" pigment dispersion state. Nanoization of primary pigment particles will improve the ...

AI Technical Summary

Problems solved by technology

Compared with the dye type, a nano-scale pigment gel pen ink can effectively solve the problems of fading and bleeding, but the pigment type gel pen ink produced by the ordinary production process and formula has a large particle size, which affects Its permeability prolongs the drying time, and there will be plugging, disconnection, uneven ink output, etc.

[0003] Pigment-based inks are colored by dispersing fine particles of pigments in the medium used. The ideal dispersion system should have a "primary (primary) particle" pigment dispersion state. Nanoization of primary pigment particles will improve the quality and The use effect is greatly improved, but as the particles become smaller, the specific surface area will double, the van der Waals attraction between the particles will become larger, and the particles will easily aggregate, resulting in poor dispersion stability, aggregation, and stratification during storage. , separation, precipitation and other deterioration phenomena, it is difficult for the general process formula and equipment to make the pigment ink system achieve the nano-sized primary particles and make it show good dispersion stability

Furthermore, the stability of viscosity is another important technical issue. The viscosity of the product will directly affect the use effect of the gel pen. If the viscosity is too high, the ink output will become smaller, resulting in broken lines or unsmooth writing, and the viscosity is too high. Small, there will be ink leakage, which will affect the writing effect. Moderate and stable viscosity value is an important indicator of gel pen ink