A paper-plastic composite-transfer process using one-component solvent-free glue

Abstract

The invention provides a paper-plastic composite-transfer process using a single-component solvent-free glue. The process includes the compounding of the transfer film and paper and the peeling off of the transfer base film. The average relative molecular weight of the glue compounded by the transfer film and paper is 1000. ‑6000 one-component solvent-free polyurethane glue with free NCO ‑ The content is 2-10%, and the viscosity of the glue at 55-85°C is 200-800mpa.s; the device for compounding the transfer film and paper includes a coating unit, a humidifying unit, a compounding unit, a cooling unit and a winding unit; The cloth unit is a five-roll glue transfer coating structure composed of rubber storage steel roller, metering steel roller, transfer rubber roller, coating steel roller and coating pressure roller; after the transfer film and paper are combined, the transfer base Membrane peeling. Compound-transfer process of the present invention, by controlling the NCO of glue ‑ Content, viscosity, relative average molecular weight and control of coating uniformity and coating thickness to obtain cigarette bale transfer paper with good folding resistance, strong adhesion and resistance to moisture change.

Description

Technical field [0001] The present invention relates to a plastic composite - transfer process, and particularly to a plastic composite paperboard production of cigarette transfer - transfer process, and more particularly, to a transfer of cardboard applied to cigarette production and use of one-component the solvent glue plastic composite - transfer process. Background technique [0002] The cigarette package is mainly for protecting the cigarettes, cigarettes convenient storage and transport. Currently used cigarette pack made of paper, cardboard and mainly white hard coated flexible bag packages, which belong to grade paper wrapper. In order to increase the decorative and security of the cigarette pack, usually by transfer white cardboard or paper jam (jam cigarette transfer) coated with the transfer film after peeling the base film to give a composite building material as the cartridge body. Transfer of cardboard cigarette packets are currently using a wet process to produce ...

AI Technical Summary

Problems solved by technology

At present, cigarette pack transfer cardboard is produced by wet lamination process: that is, after coating the self-crosslinking type modified acrylate polymer emulsion on the transfer film surface (aluminum layer or zinc sulfide layer) of the transfer film, it is combined with paper Pressing, entering the oven for thermal curing, and then peeling off the base film to achieve the purpose of compound-transfer, this process has the advantages of convenient coating construction, good leveling, no organic solvent volatilization, etc., but the product has the advantages of compound firmness and Performance defects such as poor folding resistance (especially poor wet strength) have not been overcome; in addition, the composite process is to glue the transfer film surface of the transfer film through a three-roller glue transfer method. The three-roller glue transfer structure is mainly composed of anilox It is composed of steel roller, glue roller, and coating roller. The transfer method is mainly that the anilox steel roller transfers the glue from the glue tank to the glue roller, and then applies pressure to the glue through the coating roller. On the surface of the substrate, this three-roller glue transfer method cannot coat high-viscosity solvent-free glue, and the uniformity is very poor, and the amount of glue is controlled by pressure, so the accuracy is even worse

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