Process for preparing waterborne labeling agent by using ultrasonic-microwave synergizing method

Abstract

The invention discloses a process for preparing a waterborne labeling agent by using an ultrasonic-microwave synergizing method and relates to the technical field of waterborne adhesives. The preparation method comprises the following steps: firstly, pretreatment of gelatin; secondly, chemical modification of cetyl alcohol; thirdly, preparation of a coalescing agent; and fourthly, preparation of the waterborne labeling agent. According to the labeling agent prepared by the process disclosed by the invention, during labeling, an ultrathin adhesive film can be formed between a label and a commodity; by forming the adhesive film, firm adhesion of the label in a normal use state of the commodity can be ensured, a trade mark can be effectively stripped and the labeling agent is cleared by modesof soaking with clear water and flushing when the commodity is recovered, and the clear rate of the labeling agent is enabled to reach 99.5 percent or above.

Description

Technical field: [0001] The invention relates to the technical field of water-based adhesives, in particular to a process for preparing water-based labeling agents by means of an ultrasonic-microwave synergy method. Background technique: [0002] Labeling agent, that is, commodity label adhesive. At present, many recyclable commodity packages use adhesives to stick labels separately, such as plastic packaging products and glass packaging products, so as to facilitate the rapid peeling off of labels during recycling. [0003] Existing adhesives mainly adopt traditional casein adhesives and water-based synthetic adhesives, but there are certain defects in these two products. First of all, traditional casein adhesives are sensitive to temperature. When the temperature drops or rises, the viscosity of casein adhesives will rise or fall rapidly, which will affect the stability of the product; and casein adhesives have high-speed shear The disadvantage of thinning is that the st...

AI Technical Summary

Problems solved by technology

First of all, traditional casein adhesives are sensitive to temperature. When the temperature drops or rises, the viscosity of casein adhesives will rise or fall rapidly, which will affect the stability of the product; and casein adhesives have high-speed shear The disadvantage of thinning is that the stability of the product is poor when used in high-speed machines, and it is easy to splash out from the sizing roller, causing pollution and a lot of loss of the machine

Secondly, water-based synthetic adhesives use a large amount of polymer water-resistant resin as raw materials. Although the water-resistant problem of the label is solved and the temperature sensitivity is reduced at the same time, because the polymer resin is difficult to dissolve in water, it cannot be recycled in plastic packaging products or glass packaging products. When the adhesive residue cannot be completely cleaned, if a co-solvent is used to remove the adhesive residue, there will be a problem of increasing the difficulty of cleaning wastewater treatment