High-resistance steam resistant packaging film convenient for direct microwave heating and preparation method thereof

Abstract

The invention belongs to the technical field of packaging materials, and in particular relates to a high-resistance steam resistant packaging film convenient for direct microwave heating and a preparation method thereof. The packaging film comprises an aluminum oxide plated PET (polyethylene terephthalate) film layer, a first steam resistant adhesive layer, a polyamide film layer, a second steam resistant adhesive layer and a steam resistant curtain coating polypropylene film layer which are adhered together in sequence. The preparation method of the packaging film comprises the following steps of: preparing an aluminum oxide plated PET film by steam-plating aluminum oxide on a PET film; then compounding the aluminum oxide plated PET film and the polyamide film layer together to obtain an outer layer film; and compounding the steam resistant curtain coating polypropylene film layer and the outer film layer together through a solvent-less compounding technology, thus obtaining the packaging film. The packaging film can heated with microwave directly, can resist 135DEG C high-temperature digestion to ensure that sterilization is carried out more comprehensive and thorough, and is high in resistance, good in heat sealability and air tightness, good in impact resistance, and excellent in physical mechanical property.

Description

technical field [0001] The invention belongs to the technical field of packaging materials, and in particular relates to a high-barrier and retort-resistant packaging film convenient for direct microwave heating and a preparation method thereof. Background technique [0002] As a "sunrise industry", plastic packaging materials are an indispensable part of the development of the national economy. With the development of the economy, the growth of social demand and the expansion of export commodities, the requirements for plastic packaging materials are getting higher and higher. Plastic packaging materials should be developed in the direction of energy saving, pollution prevention, multi-function and humanization. [0003] Retort packaging is one of the fastest-growing packaging categories in the past two years. High-temperature resistant retort food packaging bags (hereinafter referred to as retort-resistant bags), commonly known as soft cans, are most notable for their lon...

AI Technical Summary

Problems solved by technology

PVDC, which is widely used as a packaging material with high barrier performance, will produce Cl when its waste is burned. 2 It will cause environmental pollution; the barrier performance of EVOH is greatly affected by the environment, and when the humidity is greater than 60%, the barrier performance will drop significantly; the aluminum foil is opaque, consumes a lot of resources, is easy to wrinkle, and blocks microwave transmission; The permeability is poor, and the aluminum layer is easy to fall off when cooking at high temperature

[0006] Therefore, traditional barrier materials are difficult to adapt to the consumption and use of direct microwave heating. The food processing industry urgently needs a packaging material that not only has excellent barrier properties, can withstand cooking at 135°C, and can be directly heated in a microwave oven.

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