Recyclable environment-friendly gluing-free thermal transfer printing ink

Abstract

The invention discloses recyclable environment-friendly gluing-free thermal transfer printing ink. The ink is prepared from, by weight, the following components: 15-25% of acrylic resin, 1.5-2.5% of cellulose acetate resin, 1-3% of flexible resin, 7-30% of a pigment, 50-63% of a mixed solvent, 0-2% of an adjuvant, 0-1% of matte powder, 0-2% of wax powder and 1-3% of alkaline filler. The acrylic resin in an ink formula consists of methyl acrylate and butyl acrylate together, the alkaline filler is calcium carbonate or sodium carbonate, the flexible resin is a polyurethane resin prepolymer, theprinting production benefit and efficiency of thermal transfer printing film can be improved, the viscosity, thixotropy and printing adaptability of the ink are positively improved for the acidity ofa recovered solvent, the acidic components in the recovered solvent can be neutralized, the pH value of the ink is kept at 6-7 for normal printing, isocyanate groups can react with the moisture in therecovered solvent, the crosslinking density of an ink layer is increased while the water is consumed, high-temperature conditions can be provided, and the reaction is promoted.

Description

【Technical field】 [0001] The invention relates to the technical field of fine chemicals, in particular to the technical field of a recyclable, environmentally friendly, glue-free thermal transfer ink. 【Background technique】 [0002] Thermal transfer technology refers to printing ink on a specific substrate (such as polyethylene terephthalate (PET) film) through a printing machine to make a transfer film, and then passing the printed transfer film through a certain It is a process technology that transfers patterns to target substrates (such as photo frames, furniture facades, polymer plates and stationery plastics, etc.) under high temperature and pressure. The transfer printing process can be divided into cold transfer printing and thermal transfer printing according to the transfer temperature. The process structure of most thermal transfer films is "PET film / / release agent / / thermal transfer ink layer / / adhesive layer" , The ink will produce a lot of VOC during the product...

AI Technical Summary

Problems solved by technology

[0003] The process structure of the existing transfer film has too many layers, resulting in the production of thermal transfer film with complex patterns, the printing color set of the printing machine is not enough, and the printing needs to be distributed and cannot be printed at one time

Moreover, the back glue is generally more expensive, resulting in low efficiency and benefit of thermal transfer film

[0004] In the recovered VOC, because the decomposition of esters produces acidity, the pH value is relatively small (PH value <6), which affects the printing performance of the ink and the physical and chemical properties and odor of the transfer film