Thermal vanishing ink

Abstract

The invention provides a thermal vanishing ink, which consists of the following components by weight: 10-80 parts of water; 0-30 parts of a cosolvent; 1-75 parts of a colorant; 0.01-1 part of a bactericide; 0.1-5 parts of a thickening agent; 0.1-2 parts of a pH regulator; 0.01-1 part of a corrosion inhibitor; 0.1-3 parts of an inorganic oxide; and 1-30 parts of a film-forming agent. The thermal vanishing ink provided by the invention can be applied to all materials of different colors, and can show silver gray on white and other light color materials and show silver white on black and other dark materials. The color can vanish through any heating mode, and the vanished ink trace is transparent or colorless, and has irreversibility. Being environment-friendly and non-toxic, the ink has uniform and stable solution system, is difficult to delaminate and is favorable of storage, thus being widely applicable in leather products, clothing products, stationery commodities and other fields to meet the demands of showing colors clearly on all ground color materials with different dark and light colors and irreversible vanishing after heating.

Description

technical field [0001] The present invention relates to an ink, in particular to a thermal erasing ink. Background technique [0002] Thermal disappearing ink can make the color of the ink disappear by any heating method (including ironing, oven, hair dryer, frictional heat, etc.), and after disappearing, it can be divided into reversibility or irreversibility. Under certain conditions, the original color will be restored, otherwise, irreversibility means that the color will not be restored. [0003] At present, most of the thermal erasable inks are reversible thermal erasable inks. The ink in the friction erasable pen refills in the prior art is reversible thermal erasable inks. It is mainly used in the field of stationery, but it is cooled to minus ten degrees Celsius. will return to its original color. [0004] After being used as a scribe mark in the process of leather products and clothing products, the color will disappear by heating, and the residual traces after di...

AI Technical Summary

Problems solved by technology

However, the biggest defect of mercury ink is that it cannot be dissipated by heat, and the product is toxic

Therefore, the traces of mercury ink that cannot be thermally eliminated can only be eliminated by artificial washing or wiping, which not only destroys the quality of leather, clothing and other products, but also takes time and effort. More importantly, the inorganic substances in its components contain heavy metals, which are easy to Destroying the water quality and environment, and the proportion of inorganic substances in mercury ink is relatively large, which is prone to quality problems such as ink stratification in a short period of time, which is not conducive to the storage of ink

[0006] To sum up, first, the color of the thermal elimination ink in the prior art cannot be clearly and visibly applied to all materials of different shades and shades in a single-color product

Second, the color thermal erasable inks in the prior art cannot achieve no residue or less residue after thermal eradication, and their application is limited due to the reversibility of the color

Third, although mercury ink can be applied to all materials of different colors as a monochrome product, it cannot be dissipated by heat, is not environmentally friendly, and is unstable

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