What is the application analysis of plastic blow molding machine in food plastics?
Plastic bottle blowing machine is a packaging technology that vacuumizes the airtight container before the container is sealed, so that there is basically no air in the sealed container. The technology of plastic blow molding machine 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 developed rapidly. my country's plastic blow molding machine technology was developed in the early 1980s, while 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, and some will gradually replace hard packaging. The prospects are very promising. Vacuum, the term is translated from the Latin vacuo, which means nothingness. In fact, vacuum should be understood as a space where the gas is thinner. In a designated space, the state of gas below one atmosphere of pressure is collectively referred to as a vacuum. The degree of thinness of the gas in the vacuum state is called the degree of vacuum (degreeofvacuum), which is usually expressed by the pressure value. Therefore, the plastic blow molding machine is actually not completely vacuum, and the vacuum degree in the food container packaged by the plastic blow molding machine technology is usually 600-1333pa. Therefore, the plastic blow molding machine is also called decompression packaging or exhaust packaging. The characteristics of the plastic blow molding machine are as follows: 1. Part of the air (oxygen) in the packaging container is excluded, which can effectively prevent food spoilage. 2. The use of packaging materials with excellent barrier properties (air tightness) and strict sealing technology and requirements can effectively prevent the exchange of the contents of the packaging, which can avoid food weight loss, loss of taste, and prevent secondary pollution. 3. The gas inside the container of the plastic blow molding machine has been removed, which accelerates the conduction of heat, which can improve the efficiency of thermal sterilization and avoid the rupture of the packaging container due to the expansion of the gas during thermal sterilization.
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