The fresh-keeping film produced by the fresh-keeping production equipment is a commonly used packaging material for fresh-keeping food. It has moderate oxygen and moisture permeability, regulates the oxygen content and moisture content around the fresh-keeping product, and blocks dust in the air, thereby extending the food The shelf life. PVC cling film has the characteristics of high and low temperature resistance, high transparency, stretchability and viscosity, easy to use, low price, and is widely used in fresh food packaging. It has become an inseparable part of people's lives. So how does it keep food fresh? The following is a simple analysis.
Ensure that the channels for food to absorb oxygen and exhale carbon dioxide during storage are unobstructed, so that the food can be kept fresh, bright in color, and maintain the original flavor, so that it will not rot and deteriorate. Food cling film is used for packaging vegetables, fruits, cooked food, etc., and can also prevent food from odor and dehydration in the refrigerator.
Food cling film is a polymer with fresh-keeping properties and high oxygen and carbon dioxide permeability. It can allow food to get an appropriate amount of oxygen for unobstructed breathing and keep the stored food fresh. So when placing items, wrap them in plastic wrap and put them in the refrigerator.
As a new type of sanitary product, PE food wrap is very simple and easy to use, so many families use it. Many families use plastic wrap to keep food fresh and retain moisture. If the food cling film is used correctly, it can retain moisture and nutrition of the food; if it is used incorrectly, it will not only fail to keep it fresh, but also affect health.
At present, there are mainly three types of food cling films commonly used in the market: polyethylene (PE), polyvinyl chloride (PVC), and polyvinylidene chloride (PVDC). When using a microwave oven to heat food, the cling film should be isolated from the food. Do not let the two come into direct contact, to prevent the temperature from being too high and the cling film may be damaged and stick to the food. It is necessary to use plastic wrap to preserve food at room temperature. This will not only fail to maintain freshness, but will also accelerate the decay and deterioration of food due to high water content.