Application analysis of plastic bottle blowing machine in food plastics, plastic bottle blowing machine-machinery professional production
Plastic blow molding machine is a packaging technology in which articles are put into air-tight containers and vacuum is applied before the container is sealed, so that there is basically no air in the sealed container. Plastic bottle blowing machine technology originated in the 1940s. In 1950, polyester and polyethylene plastic films were successfully used in plastic blow molding machines. Since then, plastic blow molding machines have been rapidly developed. my country's plastic blow molding machine technology was developed in the early 1980s, and vacuum inflation Packaging technology began to be used in small quantities in the early 1990s. With the promotion of small packaging and the development of supermarkets, its scope of application has become more and more extensive. Some of them will gradually replace rigid packaging. The prospects are very promising. Vacuum, the term is translated from the Latin vacuo, and its meaning is nothingness. In fact, vacuum should be understood as a space where gas is relatively rare. In the designated space, the gas state below one atmospheric pressure is collectively called vacuum. The degree of gas rarefaction under vacuum is called degree of vacuum, and it is usually expressed by pressure value. Therefore, the plastic bottle blowing machine is actually not completely vacuum. The vacuum degree in the food container packaged with the plastic bottle blowing machine technology is usually 600-1333pa. Therefore, the plastic bottle blowing machine is also called decompression packaging or exhaust packaging. The characteristics of the plastic bottle blowing machine are as follows: 1. Part of the air (oxygen) in the packaging container is eliminated, which can effectively prevent food from spoiling. 2. The use of packaging materials with excellent barrier properties (air tightness) and strict sealing technology and requirements can effectively prevent the exchange of packaging contents, which can avoid food weight loss and taste loss, and prevent secondary pollution. 3. The gas inside the plastic bottle blowing machine container has been eliminated, which accelerates the heat transfer, which can improve the efficiency of heat sterilization and avoid the rupture of the packaging container due to the expansion of gas during heat sterilization.
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