Although PP material has good heat resistance, if you heat food rich in fat for a long time, it may exceed the upper limit of heat resistance and cause safety problems. Therefore, the packaging box made of PP should avoid prolonged microwave heating.
The texture of the disposable plastic lunch box, although the material is PP, but the performance of repeated use is poor. It may “crack” after one or two uses.
PP plastic lunch boxes, in addition to being transparent, are very rich in colors, such as white, black, red, etc. There are rumors on the Internet that “the brightly colored PP plastic lunch boxes are made of recycled materials”, which is not accurate.
It is the color masterbatch that determines the color of the PP plastic lunch box, and the color can be adjusted by adding a very small amount of color masterbatch during production. After PP plastic tableware is used, it will indeed be recycled, but the only products that can be reused are daily necessities such as water basins and plastic dining chairs.
Some of the disposable plastic lunch boxes also use PET number 01, such as sushi. The plastic lunch box made of PET is usually very light and thin, and it is easy to deform when pressed.
It’s fine for cold, low-fat foods. Of course, this cannot be reused, it is not recommended to be heated, and it cannot be placed in the microwave. Open the package, eat the food, and throw away the lunch box
●plastic bag
No. 02, HDPE material / No. 04, LDPE material. Stable to grease at room temperature. Do not use for hot food.
At present, plastic bags mainly use HDPE No. 02 and LDPE No. 04. Usually thick HDPE No. 02, such as supermarket plastic shopping bags (vestia bags), tearable roll plastic bags for vegetables, fruits, and bulk grains.
The LDPE plastic bag No. 04 is usually thinner, such as the packaging plastic bag bought earlier. Some of these plastic bags will be marked with words similar to “food only”, but they should not be used for hot food.
For example, fried dough sticks, oil cakes, and egg cakes in breakfast, the surface temperature of the freshly prepared may exceed 110°C, which is really not suitable.
In addition, there are some plastic packaging bags that use the PP material numbered 05. For example, it is safe to use for packaging bread, bagged vegetables, etc.
●Disposable water cup
No. 05, PP material.
Microwaveable and reusable. Prolonged contact with grease and prolonged heating are not recommended.
Disposable plastic water cups are mainly divided into PP material No. 05 and PS material No. 06. It is easy to deform after being pressed softly. It is basically made of PP material numbered 05. It is safe to contact with various beverages, and it is no problem even for hot beverages.
No. 05PP
The one that is not easily deformed after hard pressing is the PS material numbered 06. Such plastic water cups are not recommended for hot drinks.
No. 06PS
No. 06 PS material and No. 05 PP material have a very simple identification technique. The material that looks very transparent and shiny is basically PS material No. 06. By the way, I took a look at the blind box box, which is also made of No. 06 PS material…
In addition to disposable plastic water cups, the “disposable paper cups” that many people use actually contain plastic.
The inner wall of the paper cup is covered with a layer of plastic film made of PE material, and it is completely OK to drink water or drink normally. If you use it to make hot tea, remember not to use it repeatedly, just brew it once or twice and throw it away.