Is plastic wrap the same as a fresh-keeping bag? What is a fresh-keeping bag?

Fresh-keeping bags mainly refer to bags made of food preservative film, which are mainly used to preserve vegetables, fruits, grains, cooked food and other foods. They are widely used in daily life. Cling film is a type of plastic packaging product used in daily life to preserve food. Cling film has moderate oxygen permeability and moisture permeability, which can extend the shelf life of food and make food and fruits fresher.

Contents of this article

1. Is plastic wrap the same as a plastic bag?

2. What is a fresh-keeping bag?

3. How long can a vacuum bag preserve food?

Is plastic wrap the same as a plastic bag?

No, the differences are as follows:

1. Cling film: Cling film is a type of plastic packaging product used in daily life to preserve food. Cling film has moderate oxygen and moisture permeability, regulates the oxygen and moisture content around the preserved food, blocks dust in the air, and thus prolongs the shelf life of the food. Most of the cling films sold on the market, like commonly used plastic bags, are made of ethylene masterbatch as raw materials.

2. Fresh-keeping bags: Fresh-keeping bags are like plastic bags and can be used to hold food directly. They are mainly used to preserve vegetables, fruits, grains, cooked food and other foods. They are widely used in daily life.

What is a fresh-keeping bag?

Fresh-keeping bags mainly refer to bags made of food preservative film, which are mainly used to preserve vegetables, fruits, grains, cooked food and other foods. They are widely used in daily life. Fresh-keeping bags are divided into polyethylene, polyvinyl chloride, polyvinylidene chloride and other types according to the material they are made of.

When choosing a fresh-keeping bag, please note:

1. Pay attention to the material marked on the product: Polyethylene bags (PE) are widely used for food packaging; Polypropylene bags (PP) have high transparency and are mainly used for packaging bread, snacks, etc.; Polyvinyl chloride bags (PVC) can also be used for packaging perishable foods such as vegetables and fruits, but cannot be used for packaging oily foods or heating in microwave ovens.

2. When heating food in a microwave oven, choose a fresh-keeping bag that is specially designed for microwave ovens (such as Miojie and Xubaoxian).

3. Refrigerated and frozen foods in the refrigerator should be stored in fresh-keeping bags instead of ordinary plastic bags. The special process and raw materials of fresh-keeping bags or films have good air permeability and fresh-keeping properties, while ordinary plastic bags will cause food to rot and deteriorate after being used for a long time, and the purpose of preservation cannot be achieved.

4. It is best to use a colorless and transparent plastic bag.

How long can vacuum bags preserve food?

The time that vacuum bags can preserve food usually depends on the food they contain. If they are used to store relatively fresh agricultural and sideline products, they can usually be stored for about 6 days. If they are used to store cooked food, they can be stored for about 15 days, and if they are used to store nuts, they can be stored for about 12 months.

Vacuum bags are used to store relatively fresh agricultural and sideline products, which can usually extend the shelf life to about 6 days. Vacuum bags can remove oxygen. When food is deprived of air, bacteria cannot grow under vacuum, which delays spoilage.

Vacuum bags are used to store cooked food, which can extend the shelf life to about 15 days. After removing oxygen from the vacuum bags, the food can be prevented from being oxidized and spoiled. Cooked food contains a large amount of unsaturated fatty acids, which will begin to rot under the action of oxygen, and the vitamin A and vitamin C in the food will also be lost. Vacuum oxygen bags can prevent food from being oxidized.

Due to the absence of oxygen, nuts can usually be kept in vacuum bags for about 12 months. When storing food, vacuum oxygen bags can resist pressure and block gas, allowing the food to maintain its color, taste, shape, etc., extending the shelf life of nuts to 12 months.