Microwave heating composite packaging film and preparation method thereof

Abstract

The invention discloses a microwave heating composite packaging film which is formed by compositing a polyethylene film, a two-way tensile silicon-plated nylon membrane and a two-way tensile nylon film. The polyethylene film is composed of a corona layer and a heat sealing layer, the heat sealing layer is composed of metallocene polyethylene, low-density polyethylene and slip agent, and weight ratio among the metallocene polyethylene, the low-density polyethylene and the slip agent is 50-85:15-50:1-2. Barrier properties of the microwave heating composite packaging film exceed requirements of existing products containing aluminum foil. The microwave heating composite packaging film has good temperature adaptive performance, can be processed, transported and stored at the temperature ranging from -40 DEG C to 121 DEG C, has excellent mechanical performance, is remarkable in shock-resistant effect and punctuation-resistant effect, has the advantages of being low in sealing temperature, short in heat sealing temperature and high in sealing strength, and prevents packing contents from being influenced due to the fact that bags are damaged because of too high heat sealing temperature. Clear and flamboyant patterns can be printed on the microwave heating composite packaging film, and the microwave heating composite packaging film has good practicability.

Description

technical field [0001] The invention relates to a packaging material, in particular to a microwave-heatable composite packaging film and a preparation method thereof. Background technique [0002] With the improvement of people's living standards and the accelerated pace of life, the demand for convenient and easy-to-process foods continues to increase. The consumption of instant cooked meat products increases at a rate of more than 10% every year. At present, the packaging of fast cooked meat products is mainly packaged with aluminum-plastic composite film. Typical packaging structures include PET / AL / PA / CPP, PA / AL / CPP, PA / AL / PA / LLDPE and other structures. The above material structures are designed to meet the shelf life requirements. Aluminum foil was chosen as the barrier layer. This type of packaging has the following problems: (1) Due to the use of aluminum foil, the packaging is opaque and the contents cannot be seen. (2) Due to the use of aluminum foil, the package ...

AI Technical Summary

Problems solved by technology

This type of packaging has the following problems: (1) Due to the use of aluminum foil, the packaging is opaque and the contents cannot be seen

(2) Due to the use of aluminum foil, the package cannot be directly used for microwave heating. When heating is required, the package can only be opened and the contents can be placed in a special microwave tray for microwave heating.

(3) Can not give full play to the effect of quick packaging