High-strength and high-barrier composite packaging film for medicines

Abstract

The invention relates to a high-strength and high-barrier composite packaging film for medicines. The high-strength and high-barrier composite packaging film is prepared by the following steps: firstly extruding reactants obtained by condensation-polymerization reaction of m-phenylene diformyl and oxalic acid into a film to prepare a main film body; then fixing an aluminium-foil film on the surface of the main film body, compositing ethylene-vinyl alcohol copolymer on the surface of the aluminium-foil film, spraying an adhesive between the surface of the ethylene-vinyl alcohol copolymer and ethylene-octene copolymer, a polypropylene material and a PA (Polyamide) material, finally plating aluminium and laminating a BOPP (Biaxially-Oriented Polypropylene) thin film. The high-strength and high-barrier composite packaging film has the beneficial effects that an ethylene-vinyl alcohol thin film has good water-impermeable property and non-oxygen-permeable property, but the moisture-absorbingproperty is good, so when the ethylene-vinyl alcohol thin film is composited between multilayer films, the composite packaging film for the medicines has good water-impermeable and non-oxygen-permeable properties; aluminium powder plated on the surface and the aluminium-foil thin film composited inside are good in light-shading property, and the aluminium foil is high in density and poor in oxygen-permeable property and water-permeable property.

Description

technical field [0001] The invention relates to a composite packaging film, in particular to a high-strength and high-barrier medicine composite packaging film. Background technique [0002] At present, in the pharmaceutical packaging market, the pharmaceutical packaging films prepared by general enterprises are composed of biaxially oriented polypropylene, aluminum foil and cast polypropylene, and their barrier properties are relatively good; but due to the use of aluminum foil, the cost is relatively high; Although the cost of the packaging film made of ester and polyethylene has been greatly reduced, its barrier property is relatively poor, so the shelf life of the medicines in the package will be affected and the shelf life will be reduced. Contents of the invention [0003] The purpose of the present invention is to provide a high-strength and high-barrier medicine composite packaging film. [0004] The above-mentioned technical purpose of the present invention is ac...

AI Technical Summary

Problems solved by technology

[0002] At present, in the pharmaceutical packaging market, the pharmaceutical packaging films prepared by general enterprises are composed of biaxially oriented polypropylene, aluminum foil and cast polypropylene, and their barrier properties are relatively good; but due to the use of aluminum foil, the cost is relatively high; Although the cost of the packaging film made of polyester and polyethylene has been greatly reduced, its barrier property is relatively poor, so the shelf life of the medicines in the package will be affected and the shelf life will be reduced.