The basic principle of fresh-keeping packaging machine
The basic principle of Zhongshan fresh-keeping packaging machine The vacuum tray sealing machine adopts the start-up vacuum sealing method, and the electrical appliance adopts the Omron programmable logic controller, which has the functions of automatic evacuation, heat sealing, and waste film recovery of the film cutting machine. The machine adopts intelligent digital display temperature control Air vent temperature. The temperature error is less than plus or minus 2, the sealing strength is high, and the sealing performance is good. The fuselage is made of stainless steel and conforms to relevant food hygiene standards. The execution parts of the equipment adopt pneumatic control system, which simplifies the mechanical structure, reduces the failure rate significantly, makes the machine run more smoothly and safely, and has a beautiful seal, which greatly improves the productivity and service life of the equipment. [Equipment principle] Principle of food modified atmosphere preservation: The principle of food modified atmosphere preservation packaging is based on the different preservation effects of different gases on food, and the use of different mixed gases to achieve the purpose of preservation, color preservation, shape preservation and quality preservation. The composition of mixed gases commonly used in food modified atmosphere preservation packaging is CO2, N2 and O2, and various gases have different effects on food preservation. 1. Carbon dioxide (CO2) can inhibit the reproduction and growth of most aerobic bacteria and molds at high concentrations, which is beneficial to inhibit the reproduction of microbial insects. 2. Oxygen (O2) can inhibit the reproduction of anaerobic bacteria. Through oxygen-adjusted packaging, fresh fish can inhibit the reproduction of toxin-producing anaerobic Clostridium botulinum; fresh meat can maintain bright colors; fresh fruits and vegetables can prolong It does not wither during the fresh-keeping period. 3. Nitrogen (N2) inhibits the respiration of food itself and microbial insects and acts as a filling gas to keep the package in good shape. 【Scope of application】 1. Requirements for modified atmosphere preservation of different foods When applying the modified atmosphere packaging technology of food, the appropriate modified atmosphere atmosphere should be selected according to the different preservation characteristics of the products. 2. In the modified atmosphere of oxygen-sensitive food (such as fried peanuts, etc.) packaging, vacuuming and filling with nitrogen can further reduce the residual oxygen content in the packaging, that is, nitrogen-filled packaging, which achieves better results than vacuum packaging. 3. The modified atmosphere of the red meat packaging adopts the mixed gas composed of high oxygen content and carbon dioxide, which can maintain the color and lustre and anti-corrosion. 4. The modified atmosphere of fresh fish packaging adopts the mixed gas composed of O2, CO2 and N2, which can inhibit the reproduction of aerobic bacteria and anaerobic bacteria at the same time and preserve freshness. 5. The modified atmosphere of fresh fruit and vegetable packaging adopts the mixed gas composed of low oxygen, high carbon dioxide (compared with air) and nitrogen, which can inhibit the aerobic respiration of fruit and vegetable metabolism and keep fresh. 6. In the modified atmosphere of cooked food (cooked meat, fried fish, etc.) packaging, the mixed gas composed of CO2 and N2 can inhibit spoilage bacteria and prevent corrosion. 7. In the modified atmosphere of the packaging of baked goods (such as cakes, moon cakes, etc.), the mixed gas composed of CO2 and N2 can prevent mildew and corrosion. Zhongshan Kenwei Electromechanical Co., Ltd. has been supplying preservative packaging machines and desiccant packaging machines for a long time. The products show diversified development. Good products are always looking for good users. Our quality requirements are the guarantee for your choice of products!
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