The vest bag is a kind of common plastic bag. As for why it is called a “vest bag”, as the name suggests, it is determined by its appearance: its shape resembles a vest, hence the name. The vest bag is simple to make and has a wide range of uses. It has become an indispensable necessities for people in daily life and provides people with great convenience.
The scope of application of the vest bag: First, it is used in supermarkets and large shopping malls. It is generally divided into three sizes of large, medium and small. It is printed with more exquisite printing patterns and text. The LOGO of the chain stores across the country is required to be consistent, with high quality requirements and at the same time. Environmental friendly. Second, it is used in community convenience stores. For this reason, its quality requirements are also high, but the quantity used is small, and LOGO is also printed. Some unprinted recycled vest bags are also purchased, and some are not environmentally friendly, so it is not recommended. The third is for farmers’ markets, which are basically unenvironmental vest bags, including red, black and white.
The main function of the vest bag is to remove oxygen and prevent food from spoiling. The principle is relatively simple: food spoilage is mainly caused by the activity of microorganisms, and most microorganisms (such as mold and yeast) need oxygen to survive. In vacuum packaging, this principle is used to remove oxygen from the packaging bags and food cells, thereby depriving the microorganisms of their living environment.
Experiments show that: when the oxygen concentration in the vest bag is less than or equal to 1%, the growth and reproduction speed of microorganisms will drop sharply. When the oxygen concentration of the vest bag is ≤0.5%, most microorganisms will stop multiplying.
The vest bag meets people’s convenient and fast psychological needs in production and life. Although the bag is small, its load-bearing function is obvious, which is why it is popular in daily life.
Post time: Nov-05-2022