A plastic bottle blowing machine is a packaging technique in which an article is placed in an airtight container and a vacuum is applied before the container is sealed to make the sealed container substantially free of air. Plastic bottle blowing machine technology originated in the 1940s. In 1950, polyester polyethylene plastic film was successfully used in plastic bottle blowing machines, and the plastic bottle blowing machine was rapidly developed.
China’s plastic bottle blowing machine technology was developed in the early 1980s, and vacuum air-filled 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 application range is increasing. Wide range, some will gradually replace hard packaging, the prospects are very optimistic.
Vacuum, the term is translated from the Latin vacuo, its meaning is nothing. In fact, vacuum should be understood as a space where gas is thin. In a given space, the state of the gas below one atmospheric pressure is collectively referred to as vacuum. The degree of gas thinness in a vacuum state is called a degree of vacuum and is usually expressed by a pressure value. Therefore, the plastic bottle blowing machine is not actually completely vacuum, and the vacuum in the food container packaged by the plastic bottle blowing machine technology is usually 600-1333 Pa. Therefore, the plastic bottle blowing machine is also called a vacuum packaging or exhaust packaging.
The characteristics of the plastic bottle blowing machine are as follows: 1. Excluding some air (oxygen) in the packaging container, it can effectively prevent food from spoiling. 2, the use of barrier properties (air tightness) excellent packaging materials and strict sealing technology and requirements, can effectively prevent the exchange of packaging content substances, can avoid food weight loss, loss of taste, but also prevent secondary pollution. 3. The gas inside the plastic bottle blowing machine container has been eliminated, which accelerates the heat conduction, which can improve the heat sterilization efficiency and avoid the rupture of the packaging container due to the expansion of the gas during the heat sterilization.
In the food industry, the application of plastic bottle blowing machines is very common, all kinds of cooked products such as chicken legs, ham, sausages, etc.; pickled products such as various pickles and soy products, preserved fruits, etc. Use a plastic bottle blowing machine. The plastic fresh-keeping period of the plastic bottle blowing machine greatly extends the shelf life of the food.