Packaging material structure suitable for microwave
Release time:
2018-06-28
According to the principle of microwave, combined with the heat resistance of packaging materials, the structure level of plastic flexible packaging materials adapted to microwave should be scientifically selected. Ordinary plastic composite flexible packaging materials are only suitable for microwave heating and microwave thawing; for microwave cooking, microwave drying, microwave sterilization and other lack of use safety; ordinary plastic flexible packaging materials should be prohibited for microwave baking and microwave puffing, and special appliances must be used. 1. Single-layer structure regular plastic films include: PET, OPP, PE, CPP, NY, EVOH and other flexible packaging materials single-layer film, can be used as food packaging materials, microwave heating, microwave can directly pass through these materials, energy evenly into the packaging of food. 2, plastic structure Plastic-plastic structure flexible packaging composite films are the most common, mainly including multilayer films compounded, such as: PET // PE, NY // PE, PET // CPP, NY // CPP, OPP // PE, OPP // CPP, PET // NY // CPP, OPP // PVDC // CPP, etc. Composite films made by multilayer co-extrusion process are as follows: PE/PVDC/PE, PE/EVOH/PE, PE/NY/PVDC/NY/PE, etc. These composite membranes can also be passed through by microwaves without substantial loss of microwave energy. 3. Paper-plastic structure Paper/PE, wax/paper/PE, PE paper/PE, etc., the paper-plastic structure can also be passed through by microwaves, but the passing efficiency of the paper-plastic structure is affected by the moisture content in the paper. The higher the moisture content of the paper, the greater the loss of microwave energy. The loss of energy causes the temperature of the packaging material to rise, and the heating efficiency of the packaged food will be slightly affected. It should be noted that: because metal reflects microwave, single-layer aluminum foil and aluminum-plated film, and composite film containing aluminum foil and aluminum-plated film can not be used for microwave heating.
According to the principle of microwave, combined with the heat resistance of packaging materials, the structure level of plastic flexible packaging materials adapted to microwave should be scientifically selected.
Ordinary plastic composite flexible packaging materials are only suitable for microwave heating and microwave thawing; for microwave cooking, microwave drying, microwave sterilization and other lack of use safety; ordinary plastic flexible packaging materials should be prohibited for microwave baking and microwave puffing, and special appliances must be used.
1. Single-layer structure
regular plastic films include: PET, OPP, PE, CPP, NY, EVOH and other flexible packaging materials single-layer film, can be used as food packaging materials, microwave heating, microwave can directly pass through these materials, energy evenly into the packaging of food.
2, plastic structure
Plastic-plastic structure flexible packaging composite films are the most common, mainly including multilayer films compounded, such as: PET // PE, NY // PE, PET // CPP, NY // CPP, OPP // PE, OPP // CPP, PET // NY // CPP, OPP // PVDC // CPP, etc. Composite films made by multilayer co-extrusion process are as follows: PE/PVDC/PE, PE/EVOH/PE, PE/NY/PVDC/NY/PE, etc. These composite membranes can also be passed through by microwaves without substantial loss of microwave energy.
3. Paper-plastic structure
Paper/PE, wax/paper/PE, PE paper/PE, etc., the paper-plastic structure can also be passed through by microwaves, but the passing efficiency of the paper-plastic structure is affected by the moisture content in the paper. The higher the moisture content of the paper, the greater the loss of microwave energy. The loss of energy causes the temperature of the packaging material to rise, and the heating efficiency of the packaged food will be slightly affected.
It should be noted that: because metal reflects microwave, single-layer aluminum foil and aluminum-plated film, and composite film containing aluminum foil and aluminum-plated film can not be used for microwave heating.
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