Long-acting barrier quality-guaranteeing food packaging material and manufacturing method thereof

Abstract

The invention provides a long-acting barrier quality-guaranteeing food packaging material, which has nine layers or seven layers; the change of the layers is required by customers; the first layer (outer layer) is a PE layer, the second layer is a paper layer, the third layer is an adhesive layer and the adhesive is polyurethane water-borne adhesive, the fourth layer is a PVDC coating layer, and the other five or three layers consist of a coextrusion film structure. The material has good long-acting performance on the basis of high barrier property.

Description

technical field [0001] The invention belongs to the field of packaging materials, in particular to a long-acting barrier and quality-preserving food packaging material and a manufacturing method thereof. Background technique [0002] It has long been known in the prior art to package and transport liquid food products in liquid-tight packaging containers made of laminated packaging materials, such packaging laminates comprising a plurality of individual layers which together give the finished packaging container With the mechanical properties and chemical resistance required for packaging products, the usual packaging laminates have a strong but foldable paper core or cardboard core, which is coated on both sides with a plastic, preferably polyethylene, outer layer to This moisture sensitive core layer is protected while allowing the packaging layer to be heat-sealable. The above-mentioned packaging laminates having only paper or cardboard layers and plastic layers enable t...

AI Technical Summary

Problems solved by technology

However, there are still great defects in the production process. The processing steps are from the second layer to the third layer to the fourth layer and then to the fifth layer. Low resistance, poor heat sealing performance, low coefficient of friction and low static electricity

According to the shortcomings of the above-mentioned prior art, the inventor invented a method for making barrier liquid food flexible packaging materials and materials (Chinese Patent No. ZL200410074523.7, Authorized Notice No. CN1319722C). Meeting the need for long-term packaged food