Ink for white board marker and method for manufacturing same

Abstract

The invention discloses a white-board pen ink and preparing method, which comprises the following parts: 3.5-5.0% dye,1.0-5.0% decapping agent,48.0-71.0% alcohol,15.0-25.0% propanol,5.0- 10.0% erasable agent,3.5-5.0% resin and 1.0-2.0% dispersant. the preparing method comprises the following steps: adding alcohol and propanol in the predispersing stove; stirring to add decapping agent, erasable agent, resin and dispersant until dissolving evenly; adding dye; stirring completely; grinding for 20-30h until the grain size D50 of dye particle reaches 120-200nm; discharging.

Description

technical field [0001] The invention relates to a whiteboard pen ink, in particular to a nanoscale pigment type whiteboard pen ink and a manufacturing method thereof, belonging to the technical field of ink. Background technique [0002] Whiteboard pens are a new category of products developed by the pen industry in recent years, and the matching whiteboard pen inks basically rely on imports. At present, the high-grade special inks sold in the market are changing from dye type to pigment type. The disadvantages of dye-based whiteboard pen ink are: the dye component is easy to crystallize, resulting in uneven ink output and poor writing; it is toxic and not environmentally friendly. [0003] Pigment-based whiteboard pen ink is based on the dispersion of pigment particles in the ink system to achieve the effect. Ordinary pigment-based whiteboard pen ink has large pigment particles and poor dispersion effect, which directly affects writing. A kind of nanoscale pigment type w...

AI Technical Summary

Problems solved by technology

The disadvantages of dye-based whiteboard pen ink are: the dye component is easy to crystallize, resulting in uneven ink output and poor writing; it is toxic and not environmentally friendly

However, as the particles become smaller, the specific surface area will increase greatly, the van der Waals gravitational force between the particles will become larger, and the particles will easily condense, which will lead to deterioration phenomena such as stratification and precipitation during storage.

It is difficult for the general process technology and equipment to make the pigment particles in the ink system achieve initial nanometerization, and it is difficult to maintain good dispersion stability

Furthermore, maintaining the stability of low viscosity is another important index. If the viscosity is too high, the amount of ink output will become smaller, resulting in poor writing, thread breakage, wire drawing, etc.; if the viscosity is too small, ink leakage will occur. Viscosity is another technical problem of whiteboard pen ink