A kind of preparation method of high-speed coating connection stripping transfer glue

Abstract

The invention relates to a preparation method of a high-speed coating / connecting line peeling transfer adhesive, which comprises the following steps: (1) adding butyl acrylate, methyl methacrylate or styrene, acidic functional monomer and crosslinking monomer into an emulsifier solution to prepare a core preemulsion; (2) adding butyl acrylate, methyl methacrylate or styrene, acidic functional monomer and tert-dodecyl mercaptan into the emulsifier solution to obtain a shell preemulsion; (3) preparing an initiator solution; (4) adding deionized water, water-based acrylic resin, anionic emulsifier, sodium bicarbonate and part of the core preemulsion into a reaction vessel, and adding part of the initiator solution; dropwisely adding the rest of core preemulsion and the rest of initiator solution to obtain a core emulsion; and (5) dropwisely adding the shell preemulsion and the rest of initiator solution into the core emulsion, adding ammonia water, defoaming agent and wetting agent, and filtering to obtain the transfer adhesive. The transfer adhesive can adapt to high-speed coating and connecting line peeling transfer, and has the advantages of high peeling completeness and favorable adhesive force.

Description

technical field [0001] The invention relates to an adhesive, in particular to a method for preparing a high-speed coating on-line stripping transfer adhesive, and the prepared transfer adhesive can be used for high-speed coating on-line stripping to produce transfer aluminized paper. Background technique [0002] In order to adapt to the new requirements of joining WTO and WHO, the State Tobacco Resale Bureau of China has revised the technical standards of cigarette materials, replacing PET composite cardboard or aluminum foil composite cardboard with vacuum aluminized materials. This provides an opportunity for the development of transfer metallized paper, especially transfer metallized paper has obvious advantages in environmental performance and cost. [0003] The production process of transfer aluminized paper is as follows: PET film is coated with peeling layer paint, coated with information layer paint on the peeled layer, aluminized on the information layer to make al...

AI Technical Summary

Problems solved by technology

[0006] However, the existing transfer adhesives have more or less disadvantages, which are difficult to meet the requirements of high-speed coating connection stripping, for example: drying is not fast enough, it takes a long time to dry and have a good adhesion to the aluminum layer. Focus; when performing high-speed coating, the transfer glue will generate a large amount of foam under the violent agitation of the rubber roller, which seriously affects the actual coating operation; the small molecule emulsifier produces a migration effect, and the interface between the transfer glue and the aluminum layer is formed. Weak interface layer reduces the adhesion of the transfer glue; water-based glue has a large surface tension because of the presence of a large amount of water, while the surface tension of the plastic film is obviously lower. Spreading, shrinkage cavity and other defects are easy to occur during coating; heat resistance is poor, and it tends to soften soon above 100 °C, resulting in the destruction of the mirror effect of the aluminum coating layer on the transfer adhesive, and diffuse reflection on the gloss , the aluminized layer will lose its gloss and form atomization, resulting in the scrapping of the transferred aluminized paper; the transfer adhesive is prone to poor leveling during high-speed coating