Daily knowledge about cling film

Cling film is a daily necessities, which can be used to package uneaten meals or food. There are also many girls who use it to store cosmetics, etc. It can be seen that it is widely used. In fact, there is still a lot of knowledge in the plastic wrap, and it is in direct contact with our food, so we must pay more attention to its safety and health knowledge! Today, Xiaoke will do a good job of popularizing the knowledge about wrap film for everyone!

1, familiar with the classification of plastic wrap

The cling film of different materials has different effects. There are three main types of cling film materials, namely polyethylene (PE), polyvinyl chloride (PVC) and polydichloroethylene (PVDC).

a) Polyethylene (PE) is mainly used for packaging and storage of common fruits and vegetables;

b) Polyvinylidene chloride (PVDC), mainly used for some cooked hot dishes and food packaging;

c) Polyvinyl chloride (PVC) can be used as a general food packaging, but has a certain impact on human health.

In terms of raw materials, polyethylene and polyvinylidene chloride cling film are relatively safe to the human body.

2, how to distinguish between various plastic wrap

Understand the advantages and disadvantages, then how to distinguish the three plastic wrap? First of all, regular manufacturers have obvious labels on the product packaging name, and will also be indicated in the material description. If the label is PVC or PVC material, or marked unclear, it is recommended that you do not buy!

In addition, you can fire the plastic wrap to check: black smoke, irritating smell, PVC wrap film is automatically extinguished when leaving the flame, while PE and PVDC wrap film do not produce black smoke, no smell, will drip, leave It will continue to burn when the flame.

From the appearance, the ductility, transparency and viscosity of PVC cling film are higher than PE and PVDC cling film, so try to avoid it!

3, warm reminder

Finally, you should remind everyone not to cover the plastic wrap when the food is still hot, which will increase the loss of vitamins. It is best to wait until it is completely cooled before covering the plastic wrap.

In addition, you should also pay attention when using plastic wrap:

a) When heating oily foods, keep the wrap and food in isolation, and do not allow direct contact between the two. As the food is heated, the food oil will reach a very high temperature, destroying the plastic wrap and sticking to the food.

b) When heating the food, the container should be covered with plastic wrap, and then a small hole should be placed on the wrap with a needle such as a toothpick to facilitate evaporation of water and prevent the plastic wrap from blasting due to gas shrinkage.

c) The highest heat-resistant temperature marked by each brand of plastic wrap is different, some are about 10 °C, and the temperature in the microwave oven usually reaches about 110 °C. For long-term heating, you can choose high heat resistance. plastic wrap.