Introduction of PP5 plastic lunch box and whether it can be used for a long time
The PP5 plastic lunch box can be used for a long time.
The material of 5-PP is mainly polypropylene. Polypropylene is a non-toxic, odorless, and tasteless milky white highly crystalline polymer. It is the only material that can be used for microwave heating and is very healthy. It can be reused after careful cleaning, but the lid of the general microwave plastic box is not made of PP, so it is recommended to remove the lid when heating.
Polypropylene has good heat resistance, and the products can be sterilized at a temperature above 100°C, and will not deform at 150°C under the condition of no external force. The embrittlement temperature is -35℃, and embrittlement will occur below -35℃.
The chemical stability of polypropylene is very good. In addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, it is relatively stable to various other chemical reagents. However, low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons can soften and soften polypropylene. Swelling, and its chemical stability increases with the increase in crystallinity, so polypropylene is suitable for making various chemical pipes and fittings, and has good anti-corrosion effects.