Plastic blowing machine is the goods into the airtight container, in the container before sealing vacuum, so that the sealed container basically no air in a packaging technology. Plastic bottle Blowing Machine technology originated in the 1940s. 1950, Polyester, polyethylene plastic film successfully used in plastic bottle blowing machine, since then, the plastic blowing machine has been rapidly developing China's plastic blowing machine technology was developed in the early 80 's, and vacuum packaging technology in the early 90 to start a small number of use, with the promotion of small packaging and the development of supermarkets, Its application scope is more and more extensive, some will gradually replace the hard packing, the foreground is very optimistic. Vacuum, the term translated from the Latin vacuo, its meaning is nothingness. In fact, the vacuum should be understood as a gas thinner space. In a specified space, a gas state below an atmospheric pressure is referred to as a vacuum. The degree of gas thinning in a vacuum is called the Vacuum degree (degreeofvacuum), usually expressed as a pressure value. Therefore, plastic blowing machine is not in fact completely vacuum, the use of plastic blowing machine technology packaging food containers in the vacuum is usually 600-1333pa. Therefore, the plastic blow molding machine called decompression packaging or exhaust packaging. The characteristics of the plastic blowing machine are as follows: 1, the elimination of the packaging container part of the air (oxygen), can effectively prevent food spoilage. 2, the use of barrier (gas tightness) excellent packaging materials and strict sealing technology and requirements, can effectively prevent the exchange of packaging content material, you can avoid food weight loss, taste, and prevent two times pollution. 3, plastic blowing machine container internal gas has been eliminated, accelerating the heat conduction, which can improve the heat sterilization efficiency, but also to avoid heating sterilization, due to the expansion of the gas and the packaging container rupture. In the food industry, plastic blowing machine application is very common, all kinds of cooked products such as chicken legs, ham, sausages, etc. pickled products such as a variety of pickles and soy products, preserved fruit and other food needs more and more use plastic blowing machine. After the plastic blowing machine food preservation period of long, greatly extend the shelf life of food.