Metallization biaxial stretching polyester (BOPET) pre-coating film using chemical treatment

Abstract

The invention relates to a chemical treated metalizing BOPET precoating film and a processing technique. The precoating film comprises a substrate, an intermediate layer and a hot cement layer, and is characterized in that the substrate is a chemical treated metalizing BOPET, the intermediate layer is PEI and the hot cement layer is EVA. The intermediate layer and the hot cement layer are coated and compounded on one surface of the substrate, thus obtaining the chemical treated metalizing BOPET precoating film. As the substrate layer of the precoating film adopts the chemical treated metalizing BOPET, after the presswork is laminated during the application process of the metalizing BOPET, various printings can be carried out on the chemical layer of the surface of the substrate, and otherprecoating films can not be applied in the way like the metalizing BOPET; in addition, being metalized, the substrate has good blocking performance and lightproof; meanwhile, the precoating film alsohas the advantages of high brightness and high tensile strength that the common BOPET precoating film can not compare with.

Description

[0001] Field [0002] The invention relates to the technical field of printing film, in particular to a chemically treated metallized biaxially stretched polyester (BOPET) precoat film and a processing technology. Background technique [0003] Printed matter lamination is an important means of post-press processing, which determines the final value of printed products. The lamination process of printed matter refers to covering the paper printed matter with a plastic film, using an adhesive in the middle, and after heat and pressure treatment, the plastic film and paper are bonded together to form a paper / plastic composite. One of the most advanced surface decoration processing technology. It protects and decorates printed matter, and is widely used in the field of packaging and printing, such as the surface processing of book covers, brochures, maps, advertising gift bags, and high-end packaging boxes. The coating can be divided into two types: coating film and pre-coating ...

AI Technical Summary

Problems solved by technology

However, this technology directly uses benzene-containing solvents in the coating process, which brings three major disadvantages that cannot be overcome due to its own process:

[0005] (1) Environmental protection issues: due to the volatilization and overflow of the toxic substance benzene, it causes air pollution and brings great harm to the health of producers and users; at the same time, the harmful substances remaining in the film are harmful to the health of consumers. adverse effects

[0006] (2) Quality problems: Since benzene, a volatile substance, continues to overflow after the film coating process, it is easy to form air bubbles between the film and the paper, making the surface of the printed product foggy, affecting the smoothness, clarity and color vividness of the printed product ; Sometimes due to insufficient bonding strength, it even causes cracking, wrinkling and peeling

In addition, that is, the production equipment of the coating film has a low degree of automation, which reduces the yield of the film coating

[0007] (3) Safety issues: Since the solution contains benzene, a volatile organic solvent, it is easy to form a flammable and explosive gas atmosphere around the liquid tank, and the plastic substrate used generates static electricity during operation, causing fire hazards

There have been several accidents like this, ranging from shutdowns to stop production, to machine burns, plant collapses, and casualties

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