Use plastic wrap to protect food. The correct use of plastic wrap

. According to different materials, plastic wrap can be divided into four types:

PE plastic wrap:

the most common plastic wrap on the market, with a high safety factor, such as raw fruits and vegetables, meat Leftovers can be wrapped directly with PE plastic wrap. The only disadvantage of PE fresh-keeping film is poor heat resistance.

PVC cling film:

this cling film should be rare now, but it does not rule out that it is still on sale in some supermarkets. PVC plastic wrap is only suitable for wrapping some frozen fruits and vegetables. For meat and greasy dishes,

pvdc and PMP fresh-keeping films can not be wrapped with this kind of fresh-keeping film:

these two kinds of fresh-keeping films are the safest and most versatile among the fresh-keeping films. High safety factor, good isolation performance for water, many gases and oils. Moreover, it can withstand high temperature heating of up to 180 ℃.

tips for selecting fresh-keeping film:

1. Logo: when purchasing fresh-keeping film, you must go to a regular supermarket or shopping mall, and you must choose polyethylene (PE) products with QS logo and certificate number.

2. Packaging: if you want to buy a fully packaged product, and the packaging indicates the production date and shelf life, you must choose the fresh-keeping film within the shelf life, so as to avoid the breeding of bacteria and bacteria, and the fresh-keeping film with polyethylene as raw material and without plasticizer is safer.

3. Appearance: if the fresh-keeping film is flat, without bubble perforation and damaged impurities, it is a qualified fresh-keeping film.

4. Taste: qualified preservative films do not have any peculiar smell. For those with taste, they will not only taste with food, but also affect food safety.

How to use the plastic wrap correctly

1. Cool the food first

no matter which kind of plastic wrap is made, as long as it directly contacts hot food with a temperature of more than 60 ℃, the plastic wrap is easy to melt plasticizer or toxin, Therefore, the food should be placed in a deep bowl, and if it is hot, it should be cooled first, and then the preservative film should be covered on the container to prevent the food from contacting the preservative film after the heat rises and releasing toxic substances.

2. Avoid contacting high-fat foods

cheese, ham, sausage and other high-fat foods. Do not directly contact the fresh-keeping film to avoid dissolving plasticizer.

3. Use a deep container

. The preservative film of any material should be at least 2 cm away from the food, so that the preservative film only contacts the container, not the food itself, so put the food materials into a deep bowl or glass box.

4. Never heat the preservative film. The heat-resistant temperature of

PVC or PE preservative film shall be at least 110 ℃, but as long as it is heated in an electric cooker, oven or microwave oven, the preservative film is easy to soften or deform, and then release chemicals, so the preservative film must not be heated.

5. The fresh-keeping film made of

pe or PVC can be used to coat fresh vegetables and fruits without oil and at normal temperature, but the vegetables and fruits wrapped with fresh-keeping film bought from the mall should be thoroughly cleaned before eating. If the food is kept fresh by refrigeration or freezing, first isolate the fruits and vegetables with paper towels or white paper, and then keep the outer layer fresh with fresh-keeping film, which is the safest use principle.

Which foods can’t use preservative film:

preservative film is a common plastic packaging product for fresh food. It can be often seen in many families. It can be used for food insurance, not only storing food in the refrigerator, It is also very common in microwave heating food. But not all foods can use plastic wrap.

some professionals have tested that the vitamin C content of leek yellow, rape and lettuce leaves wrapped with preservative film is 1 or 33 mg more than that of leek yellow without preservative film after being placed for one day; It is 1 or 92 mg more than rape and lettuce leaves. But don’t think that the nutrition of all foods wrapped with plastic wrap will be higher than that without plastic wrap. For example, if radish, beans and cucumber are wrapped with plastic wrap for storage, the content of vitamin C will be greatly reduced. Therefore, it is not recommended to store these foods with plastic wrap.

in addition, all kinds of cooked food, hot food and food containing oil, especially meat, are not recommended to be wrapped and stored with plastic wrap, because the chemical components in the plastic wrap will volatilize after wrapped with plastic wrap, which will be integrated into the food and affect the body health. Therefore, it is recommended to eat cooked food and meat at one time or store them in plastic wrap, Never use plastic wrap. Only the correct use of plastic wrap can make your body healthier.