Vacuum Packaging: Put food into the packaging bag, extract the air from the packaging bag, and complete the sealing process after reaching the predetermined vacuum. Vacuum inflatable packaging will put food into the packaging bag, extract the air from the packaging bag, reach the predetermined vacuum, then fill nitrogen or other mixed gases, and then complete the sealing process.
的原则,真空包装,真空包装指的是提取所有的空气的包装和包装材料与氧渗透率很低,所以氧气不能穿透到外面,减少氧化和酸败的新鲜肉类,以确保新鲜肉类的新鲜。真空包装鲜肉可在0±1℃下存放14 ~ 20d。
The principle of vacuum packaging, vacuum packaging refers to the extraction of all air packaging and packaging materials and low oxygen permeability, so oxygen can not penetrate outside, reduce oxidation and rancidity of fresh meat, to ensure the freshness of fresh meat. Fresh meat packaged in vacuum can be stored for 14 to 20 days at 0 (+1 C).
真空包装本身的保质期比托盘包装长5 ~ 7天，但真空包装后，由于氧气的阻塞，肉会变成暗红色，这将损害外观。然而，如果从包装上拿下来，肉被氧气冷却后会变成鲜红色。因此，真空包装一般用于酒店和一些仓储时间长、质量要求高的大卖场。
Vacuum packaging itself has a shelf life of 5 to 7 days longer than tray packaging, but after vacuum packaging, due to oxygen blockage, meat will turn dark red, which will damage the appearance. However, if removed from the package, the meat will turn bright red when cooled by oxygen. Therefore, vacuum packaging is generally used in hotels and some large stores with long storage time and high quality requirements.
Vacuum packaging materials include polyester, polyamide, nylon, polyester film and polyethylene multilayer materials in addition to polyvinylidene chloride (PVDC) with good air permeability and shrinkage. The antioxidant and air permeability of vinylidene chloride are suitable for various membrane crown materials, but its main disadvantage is non-thermal sealing. Polyester has strong tensile strength and softness; nylon has good oxygen-proof permeability, heat resistance and cold resistance, and its mechanical properties are very strong, but the water vapor permeability is high and the price is expensive, so many of them use multi-layer composite as vacuum packaging materials for fresh meat.
Vacuum packaging can inhibit the growth of microorganisms and avoid external pollution. It can reduce the oxidation rate of fat in meat and inhibit the activity of enzymes. Reduce water loss, maintain product weight; beautiful packaging, intuitive, enhance the desire to buy, easy to carry.