Easily degradable paper-like novel high-barrier packaging film for UHT liquid milk

Abstract

The invention discloses an easily degradable paper-like novel high-barrier packaging film for UHT liquid milk. The packaging film is a nine-layer composite structure processed by a nine-layer co-extrusion apparatus in one shot. The packaging film has paper-like appearance and can be written like book paper; meanwhile, the film has high-barrier performance and enables a shelf life to be prolonged to 3 months, and the greatest advantage of the film is that the film is degradable.

Description

technical field [0001] The invention relates to a novel UHT liquid milk high-barrier packaging film which has a paper-like appearance and is easy to degrade. Background technique [0002] At present, there are two main types of packaging methods for UHT liquid milk: one is Tetra Pak and Tetra Pak Pillow produced by Tetra Pak Packaging Co., Ltd. of Sweden; the other is co-extrusion of three or five layers of black and white plastic film. The former has high barrier properties, good shelf display effect, shelf life of more than 6 months, good formability, and almost monopolizes the high-end market of liquid milk packaging, but the packaging cost is relatively high, and it needs to be used on Tetra Pak’s special packaging machine , strong exclusivity. The packaging cost of the latter is low, but the toughness of the material is not good, and the rate of bag breakage is high during the process of running the machine, especially at low temperature, and the shelf life is generall...

AI Technical Summary

Problems solved by technology

[0003] Although the above two material structures currently occupy the Chinese market, both Tetra Pak and black and white milk film are non-degradable materials that have a great impact on the environment

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