The key function of the vacuum packaging machine is to remove oxygen, which is beneficial to avoid food mildew. Aspergillus flavus and yeast) need oxygen to survive,
The vacuum packaging bag is to use this basic principle to remove the oxygen in the packaging bag and the food cells, so that the microorganisms lose the natural environment for survival.
Vacuum packaging bags cannot inhibit the growth of Pseudomonas aeruginosa and the mildew and discoloration of food caused by enzyme reaction, so it needs to be integrated with other auxiliary methods, such as freezing, freezing, drying, high temperature sterilization, irradiation sterilization, microwave sterilization , salted, etc.
Nowadays, ordinary vacuum packaging machines often use 2-4mm thick stainless steel plates as raw materials. If the raw material is thin, then the working pressure of the vacuum pump is high, it is very easy to cause welding cracks, and the vacuum chamber is very easy to leak.
Under normal circumstances, the stainless steel plate vacuum chamber opens the sealing around the plan view on the plan view. If the manufacturer's processing technology is insufficient, the sealing groove is relatively flat, and the relative density of the vacuum chamber will be reduced.
At this stage, some vacuum packaging machines on the vacuum chamber are aluminum alloy casting, and then the sealed shell is used, and the lower vacuum chamber is produced and processed with excessively thick stainless steel plates. For the selection of vacuum machines, if you want to pack liquid or particulate matter such as dry and non-corrosive objects, it is recommended to use aluminum alloy profiles, but if you want to pack fruit juice with high concentration of acid, it is recommended to use stainless steel plates.
For hydraulic seals, silica gel should be used. Silica gel has high heat resistance, good corrosion resistance, good airtightness and long service life.
Full transparent cover: beautiful and elegant, you can see the actual effect of the vacuum packaging bag, the disadvantage is that the application life is short, because the pressure difference between the inside and outside is very large, when the cover is very easy to crack, it will be fatigued for a long time.
General thick steel plate: the usual thickness of thick steel plate is about 2mm. When the long-term working pressure is at the limit, the bottom of the outer cover is firm and not easy to deform, and the actual working pressure of the packaging machine is about 150Pa.
Thickened thick steel plate: High-quality vacuum packaging machines usually use 4mm cold-rolled plates, usually SUS304 stainless steel plates as raw materials for vacuum packaging machines.
Let's talk about the Rashen plastic film used in the vacuum packaging machine. The first is the detection of plastic films for food-grade materials. The automatic Rashen plastic film vacuum packaging machine may be used to detect food-grade materials for food packaging. Plastic film .
The bags are usually packaged in composite bags, and the polymer materials are high-pressure polyethylene, polypropylene, polyester, and polyester. Usually PET/PE is applied. Like high temperature steaming, polyester composite CPP or other polymer materials. With the improvement of the standard of clothing, food, housing and transportation, most of the sales market is a package of food.
