Which lunch boxes cannot be put in the microwave oven?
Microwave oven is a cooking appliance that uses food to absorb microwave energy in the microwave field to heat itself. The microwave generated by the microwave generator in the microwave oven establishes a microwave electric field in the microwave oven cavity, and certain measures are taken to make this microwave electric field distributed as evenly as possible in the furnace cavity.
The food is put into the microwave field, and the control center controls the cooking time and microwave field intensity to carry out various cooking processes. So which lunch boxes cannot be put into the microwave oven?
1. Plastic lunch boxes with poor heat resistance
Ordinary plastic lunch boxes have poor heat resistance and cannot be used as microwave cooking utensils.
2. Glass lunch boxes with poor heat resistance
When cooking food, the temperature can be very high, making it easy to break the glass lunch box. Therefore, heat-resistant glass lunch boxes cannot be used.
3. Metal lunch boxes that cannot be penetrated by microwaves
Metal lunch boxes such as aluminum pots, enamel pots and stainless steel pots cannot be penetrated by microwaves, and ignition will occur on the inner wall of the furnace when it touches metal, so it cannot be used.
Step 4: Lunch boxes for lacquerware
The paint on the lacquer's lunch box may peel off and melt after being heated, generating harmful substances, and the container may also crack. Heated food is also unhealthy to eat.
Ordinary lunch boxes are currently mostly plastic products, and polyethylene is non-toxic, but some are cheap and inferior useful polyvinyl chloride, which releases toxic substances when heated. Various lunch boxes have different materials, some are marked with the words microwave oven special, but the materials are divided into PP and PP + PS, and some are suitable for what and what materials are not marked.
PP refers to polypropylene, which has excellent mechanical properties and thermal properties, and is used in various performance laminating materials and packaging materials. PS is commonly known as hard glue, ordinary hard glue, hard and brittle, when beaten, it emits a metallic "ding" sound, the sound is crisp, commonly known as "ring glue", non-toxic and odorless.
These materials are also safe to heat in a microwave oven and do not release toxic substances. It is important to note that lunch boxes are usually labeled as being suitable for use in microwave ovens. Some lunch boxes have lids that are not made of PP, so they cannot be heated in a microwave oven. When cooking hot meals, it is best not to use lids.
