A kind of anti-counterfeiting water-based irreversible temperature-changing ink and its preparation method

Abstract

The invention belongs to the field of anti-counterfeiting printing inks, and in particular relates to an anti-counterfeiting water-based irreversible temperature-changing ink and a preparation method thereof. The ink comprises the following raw materials in parts by weight: 40-50 parts of water-based acrylic resin; 20-50 parts of diacetylene glycol irreversible color pigments 30 parts; 1-2 parts of emulsifier; 5-10 parts of co-solvent; 2-5 parts of dispersant; 0.1-0.4 parts of defoamer; 20-30 parts of water. The preparation method is simple, wherein a static mixer is used, and the prepared ink is more stable. The main solvent of the anti-counterfeiting water-based irreversible temperature-changing ink provided by the invention is water, and a small amount of non-toxic organic co-solvent is used. It is an environmentally friendly ink and has a better working environment; the ink provided by the invention is in a suitable temperature range ( For example, 50-70°C) can irreversibly change from blue to red, which can prevent criminals from tearing off the label on the genuine product by heating and then using it on the counterfeit product, which has a good anti-counterfeiting effect.

Description

technical field [0001] The invention belongs to the field of anti-counterfeiting printing inks, and in particular relates to an anti-counterfeiting water-based irreversible temperature-changing ink and a preparation method thereof. Background technique [0002] The anti-counterfeit label of the product is an important basis for consumers to distinguish the authenticity of the product. Usually, the anti-counterfeit label is attached to the product or the packaging of the product in the form of a self-adhesive label. At present, anti-counterfeiting methods are usually used on packaging, such as: laser holography, digital query, printing anti-counterfeiting, etc. To a certain extent, it increases the technical difficulty of logo imitation and increases the cost input of logo imitation. However, these anti-counterfeit labels can be completely peeled off from genuine products by heating, and are reused on fake and inferior products, causing losses to producers and consumers. ...

AI Technical Summary

Problems solved by technology

There are mainly three types of temperature-changing pigments currently used: ①Inorganic substances, thermal decomposition produces color changes, which are generally irreversible, but the temperature of thermal decomposition is high, above 100 degrees, but the label is peeled off by heating at 70 degrees or even lower The temperature can be achieved, so the use of inorganic temperature-changing pigments cannot meet the standard requirements of label anti-transfer - the purpose of preventing heat transfer

② Liquid crystal material, the temperature of liquid crystal color change is very low, usually below 30 degrees, the color change occurs, and the color change is reversible, so the purpose of anti-transfer cannot be achieved

Images