What material does the food vacuum bag use to be the most environmentally friendly?
Vacuum in a vacuum bag, a term translated from Latin vacuo, means nothing. In fact, vacuum should be understood as a thinner space for gas. In a specified space, a gas state below an atmospheric pressure is collectively referred to as a vacuum. The degree of gas thinness in a vacuum state is called the degree of vacuum,000 and is usually expressed as a pressure value. Therefore, vacuum packaging is not actually completely vacuum, the vacuum in food containers packaged using vacuum packaging technology is usually 600-1333Pa (standard atmospheric pressure: 101325Pa). Therefore, vacuum packaging is also called decompression packaging or exhaust packaging.
Food vacuum packaging bags are widely used in the food industry, this is precisely because the vacuum packaging will be all the air in the package out of the seal, to maintain the bag in a highly decompressed state, air is scarce equivalent to low oxygen effect, so that microorganisms do not have living conditions, in order to achieve the purpose of fresh food, no disease. In addition to inhibiting the growth and reproduction of microorganisms, another important function is to prevent food oxidation, because fat food contains a large number of unsaturated fatty acids, oxygenated by the action of oxidation, so that food taste, deterioration, in addition, oxidation also makes vitamin A and C loss, food coloring unstable substances by the action of oxygen, so that the color darkens.
Therefore, deoxygenation can effectively prevent food spoilage, maintain its color, aroma, taste and nutritional value. Generally in salted food, pickles, soy products, meat products, convenience food, soft cans and so on play a role. In addition, there are many foods that are not suitable for vacuum packaging and must be vacuum inflatable packaging, such as brittle fragile food, easy to block food, easy to deform oily food, sharp angle or high hardness will puncture the packaging of food. The main role of vacuum inflatable packaging in addition to vacuum packaging with the quality of oxygen function, there are mainly anti-pressure, gas resistance, preservation and other effects, can more effectively make food long-term to maintain the original color, aroma, taste, shape and nutritional value.
