Preparation method of environment-friendly packaging material

Abstract

The invention discloses a preparation method of an environment-friendly packaging material. The preparation method comprises the following procedures: (1) adding toluene diisocynate and the like into a first reaction kettle at the room temperature, so as to obtain a primary product; (2) adding dimethylolpropionic acid and the like into the primary product, so as to obtain an acrylate modified aromatic waterborne polyurethane emulsion; (3) adding silica sol and the acrylate modified aromatic waterborne polyurethane emulsion into a third reaction kettle at the room temperature, so as to obtain a mixed emulsion; (4) adding a proper amount of acrylic copolymer sylvite and the like into a fourth reaction kettle containing distilled water, so as to obtain a mixed base solution; (5) adding the mixed emulsion into the mixed base solution, so as to obtain the environment-friendly packaging material; (6) carrying out wiping and air-drying on a plastic film, and diluting the environment-friendly packaging material; and (7) spraying the environment-friendly packaging material to the plastic film, so as to obtain an environment-friendly packaging material paint film. By utilizing the environment-friendly packaging material prepared by virtue of the preparation method, a to-be-protected object can be effectively closed and protected, and the pollution, corrosion and damage of the object are prevented.

Description

technical field [0001] The invention relates to the field of packaging and decoration, in particular to a method for preparing a coating film of an environmentally friendly packaging material. Background technique [0002] In order to prevent the materials or semi-products exposed to the atmosphere from being polluted, corroded and damaged, and prolong their service life, they are usually coated with good protective and peelable coatings on their surfaces for effective and temporary maintenance. Archive protection. In this way, it can not only isolate the invasion of air, salt spray, and microorganisms from the outside to achieve anti-corrosion effect; but also achieve the effect of cleaning and decontamination by adsorbing pollutants. Compared with solvent-based protective coatings, water-based protective coatings are safer and more environmentally friendly, so they are widely used in the field of product packaging and decoration. However, the existing water-based protec...

AI Technical Summary

Problems solved by technology

However, the existing water-based protective coatings still have the disadvantages of low film strength, poor peelability and single protective performance.