New thermochromic ink

Abstract

The invention provides a new thermochromic ink comprising the following main components: 50-55 parts of a binder material, 1.5-2.5 parts of a crosslinking agent, 38-42 parts of a thermo-achromatizing reversible discoloring pigment and 5-8 parts of a defoaming agent, the binder material is a polyvinyl alcohol resin powder material, the crosslinking agent is a boric acid solution, and the defoaming agent is tributyl phosphate. The invention discloses the new thermochromic ink, the thermochromic ink is reasonable in component configuration, in line with energy saving and environmental protection requirements, simple in preparation process, and moderate in production cost, and the prepared ink is good in covering power, bright in color, good in wear resistance, high in color sensitivity, and very suitable for the fields of food security labels and thermal packaging materials and the like.

Description

technical field [0001] The invention relates to an ink, in particular to a novel thermochromic ink, and belongs to the technical field of inks. Background technique [0002] Ink is an important material for printing. It expresses patterns and characters on the substrate through printing. Ink is generally composed of pigments, binders, solvents and additives, etc. These components are evenly mixed and rolled repeatedly to form a viscous colloidal fluid. Ink is widely used in various printings such as books, periodicals, packaging and decoration, and architectural decoration. With the increase of social demand, the variety and output of ink have also expanded and increased accordingly. Thermochromic ink is a kind of ink with thermochromic properties, which can change color rapidly with the change of ambient temperature, so that the colored object has a dynamically changing color effect, so it is widely used in food anti-counterfeiting labels and heat-sensitive packaging mate...

AI Technical Summary

Problems solved by technology

In the current technology, most thermochromic inks are prepared by using inorganic or liquid crystal reversible thermochromic pigments. Although they have a certain thermochromic performance, the sensitivity of color change needs to be improved, and the stability is average; at the same time, due to the The defects in the selection of materials and the preparation process make the prepared thermochromic ink not meet the requirements of environmental protection, the production cost is high, and the adhesion and friction resistance are poor.