Writing chalk and preparation method thereof

Abstract

The invention discloses a writing chalk and a preparation method thereof, and particularly relates to the technical field of writing pens. The writing chalk comprises liquid paraffin, a moisture absorbent, a solvent, titanium dioxide, talcum powder and gypsum powder. The preparation method of the writing chalk comprises the following steps: mixing and stirring the liquid paraffin, the moisture absorbent, the solvent and the water; adding titanium dioxide and talcum powder into the mixture, and stirring; adding the gypsum powder while stirring, and continuously stirring; and after the materials are uniformly mixed, injecting the mixed material stirred in the above steps into a mold, extruding, and drying to obtain the material. The writing chalk is clear in pen touch, easy to wipe, unlimited in dryness and humidity, not prone to sticking to the hand when used and good in hand feeling.

Description

Technical field [0001] The present application relates to the technical field of writing pen, and in particular, a writing chalk and a preparation method thereof. Background technique [0002] With the rapid development of informationization, more and more display cover glass must not only meet the needs of HD display, but also ensure the requirements of touch effect, multi-function writing. At present, there is no special writing chalk, which is mainly to increase the roughness of the glass surface, making the traditional pen writing marks to its surface, but during the actual use, due to traditional pen Mainly used in traditional blackboards, when displaying glass glass, the writing traces have become poor, and the far distance is difficult to identify; or increase the substance of a large amount of oil or organic solvent, so that the adhesion is greatly enhanced, but It is often difficult to erase, affect the experience of teachers and students. [0003] Such as Chinese patent...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN110408265A discloses a kind of pen, besides dyestuff, has also increased various organic solvents such as resin, adhesion promoter, solubilizer, humectant, leveling agent, can write on glass, steel, ceramics etc., although color and luster is bright , water resistance, but often difficult to erase, the use experience is very poor

[0005] The above-mentioned writing chalk adds a large amount of grease, waxes, resins and other substances, such as synthetic wax, liquid paraffin (ie mineral oil), etc., although the writing color rendering degree is greatly improved, but because the display cover glass is mostly anti-glare ( Anti-glare, AG) treatment, the surface roughness is greater than that of ordinary glass, so it is extremely difficult to wipe, and multiple wet wipes are required, otherwise there will be a large area of ​​writing marks and water mixed stains on the board surface, and a large amount of oil wax resin components Do not use special cleaning agent, it will remain after every writing, if things go on like this, it will damage the surface of the board and affect the touch effect

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