Reversible temperature change erasable neutral ink composition and its manufacturing method

Abstract

The invention discloses a reversible temperature change erasable neutral ink composition and its manufacturing method. The composition comprises the following components by weight: (a) 30-50 parts of a reversible temperature change pigment; (b) 2-5 parts of a shear thinning viscosity conditioning agent; (c) 0-5 parts of a viscosity stabilizer; (d) 5-20 parts of a moisturizing wetting agent; (e) 0.05-0.5 part of an antiseptic antimildew agent; and (f) 14.5-72.95 parts of deionized water. The total weight of the components (a)-(f) accounts for 95-100% of the total weight of the composition. The neutral ink provided in the invention has excellent writing performance, instantaneous erasability, long time erasability as well as excellent rewriting performance.

Description

technical field [0001] The invention relates to a reversible temperature-changing neutral ink composition, in particular to a reversible temperature-changing erasable neutral ink composition and a manufacturing method thereof. Background technique [0002] At present, erasable hard pen writing instruments on the market are mainly divided into pencils, erasable ballpoint pens, acid-base erasable erasable pens, ordinary eraser erasable gel pens, etc. The handwriting written by other writing tools can be erased and modified. Handwriting is not easy to modify. At present, the latest general eraser erasable gel pen, although it can be erased with an eraser, will leave obvious handwriting after erasing, and after repeated writing, the font will be blurred, which will affect the visual effect; and there are requirements on the choice of paper. In the student's workbook, the fastness is not good, and the handwriting will be blurred when the paper is rubbed. However, if it is used o...

AI Technical Summary

Problems solved by technology

[0004] The first is the oil-soluble eraser-erasable ballpoint pen ink that wraps the dye with a polymer rubber substance and uses a volatile organic solvent as a carrier. Because it uses a volatile organic solvent, it is not safe to use and is not environmentally friendly.

[0005] The second is the magic gel pen ink. This kind of ink uses chemical reaction, acid-base neutralization principle to make it develop color --- achromatic, so there are usually two pens, one (including acid ink) for pen For writing color development, use another pen (containing alkaline reagent) to wipe when it needs to be modified, to achieve acid-base neutralization and make the color fade away, and it cannot be reused on the same wrong font position. Two inks of this kind It is inconvenient to carry the pen, and when used, a chemical reaction occurs, which is unsafe and environmentally friendly

Although this kind of ink can be erased with an eraser, it is difficult to control the uniformity of the particles, and a large part of the small particles will penetrate into the fibers of the paper. After the eraser is erased, obvious writing will be left. After repeated writing, the font will be blurred. Affect the visual effect; and there are requirements on the choice of paper. In student workbooks, the fastness is not good, and paper friction will make the handwriting blurred. When used on office paper A4 paper, it will leave a deep stain after erasing. handwriting

[0007] Based on the above, there is an urgent need in this area for a kind of excellent writing performance, instant erasability, long-term erasability and excellent rewriting performance; it breaks through the poor fastness of erasable gel pens on the market, and challenges Paper and ink products with various disadvantages such as writing and leaving obvious handwriting after being altered