Preparation method of high-barrier CPP (casting polypropylene) aluminized film

Abstract

The invention discloses a preparation method of a high-barrier CPP (casting polypropylene) aluminized film, which comprises the following steps: step 1, preparation of a high-barrier film: completely mixing the following ingredients by weight parts: 35-50 parts of polyethylene terephthalate (PET), 5-10 parts of o-phenylphenol and 5-20 parts of polyvinylidene chloride, centrifuging the mixture in a high-speed centrifuge, performing polymerization reaction; then performing extrusion molding on the material after polymerization reaction with a twin-screw extruder, cooling and drying to obtain the high-barrier film; step 2, selecting a PET base film with haze of 55-59.8% and light transmittance of 86-89%; and pasting the high-barrier film obtained in step 1 on the PET base film to obtain a PET film; step 3, performing corona on the upper surface of the PET film obtained in step 2; step 4, paving a fiberglass mesh layer on the surface of the PET film after corona; and step 5, performing vacuum aluminizing on the surface of the fiberglass mesh layer of the PET film by a vacuum aluminizing machine to form an aluminized layer, so as to obtain the high-barrier CPP aluminized film.

Description

technical field [0001] The invention relates to the technical field of film production, in particular to a production method of a high-barrier CPP aluminized film. Background technique [0002] Traditional flexible plastic packaging generally uses aluminum foil with a thickness of 6-20 μm. The aluminum foil has a silvery white luster. Printing transparent ink directly on the aluminum foil can have a unique metallic luster. Aluminum foil has good shading properties, gas barrier properties, moisture barrier properties, good thermal conductivity, and electromagnetic shielding properties. Among them, the most prominent is the barrier performance of aluminum foil. Under the premise of sufficient thickness of aluminum foil, it can completely block gas and moisture. Therefore, aluminum foil is an indispensable material in flexible plastic packaging base film and is widely used in pharmaceutical packaging, food Packaging, especially the flexible packaging of high-end products such ...

AI Technical Summary

Problems solved by technology

As people have higher and higher requirements for the aesthetic effect and quality of the outer packaging of products, further requirements are put forward for the high barrier properties of CPP films, but the existing CPP films are difficult to meet the requirements