The special lunch boxes for microwave ovens are made of the following materials:

1. Glassware

Including borosilicate glass, glass-ceramics, and titanium oxide crystallized glass The utensils are suitable for long-term use in microwave ovens due to their good microwave penetration performance, stable physical and chemical properties, and high temperature resistance (up to 500°C or even 1000°C).

2. Ceramic ware

There are heat-resistant ceramics and ordinary ceramics. Pots, plates and other utensils made of heat-resistant ceramics are suitable for long-term use in microwave ovens, while ordinary ceramic utensils can only be used for short-term heating. In particular, we should remind you that ceramic vessels containing gold and silver wires will cause sparks when used in a microwave oven, so they should not be used.

3. Plastic utensils

Various utensils made of polypropylene, polypropylene resin, composite polypropylene, polysulfone and other materials can withstand temperatures above 120 degrees Celsius and can be used in microwave ovens heating. Containers made of PET resin and polyester materials have a temperature resistance of over 220 degrees Celsius and can be used for barbecues.

4. Wooden paper and other utensils

In wet conditions, these utensils can be used in the microwave oven for a short time. But over time, the drying of the utensils will cause excessive combustion. Painted utensils are prohibited from being used in microwave ovens because the paint contains benzene, which will dissipate when heated by microwaves and contaminate food. Therefore, for safety and health, it is better to choose a microwave lunch box made of glass or ceramic.

Microwave lunch boxes are made of different materials. Some are marked with microwave-specific words, but the materials are divided into PP and PP PS, and some are not marked with any material. There are many types of microwave lunch boxes, some are suitable for use in microwave ovens, some are not, and some are even harmful to health. Therefore, when consumers purchase microwave lunch boxes, they should carefully select them, and the most important thing is to master three elements: ① strong microwave penetration, ② high temperature resistance, and ③ compliance with food hygiene requirements.

Experts said that PP refers to polypropylene, which has excellent mechanical and thermal properties and is used in various performance laminates and packaging materials. PS is commonly known as hard glue. Ordinary hard glue is hard and brittle. When struck, it makes a metallic "ding-dang" sound. The sound is crisp and clear. It is commonly known as "ringing glue". It is non-toxic and tasteless. This kind of material can be used for packaging, and it is non-toxic, tasteless and safe to use. Lunch boxes made of PP are relatively soft, while lunch boxes made of PS are slightly harder. There is no difference in other aspects.

These materials are also safe to be heated in a microwave oven and will not release toxic substances. It should be noted that most lunch boxes are marked whether they are suitable for microwave use. The lids of some lunch boxes are not made of PP, so they cannot be heated in a microwave. It is best not to wear a lid when heating meals. In addition, if some lunch boxes are not marked with materials, they may be inferior quality lunch boxes and it is best not to put them in the microwave oven.