Manufacturers of daily chemical packaging bags analyze the materials of cooking bags in detail
There are two layers, three layers, four layers and even more. The two-layer cooking bag is transparent plastic / plastic, such as PET / CPP or OPA / CPP; the three-layer cooking bag has transparent plastic / plastic, such as PET / OPA / CPP, and opaque type containing aluminum foil, such as PET / AI / CPP, OPA / AI / CPP; the four-layer cooking bag is made of aluminum foil and opaque PET / AI / OPA / CPP, The inner layer of cooking bag with more layers does not need pure CPP film, but uses multi-layer coextrusion film, such as PA / EVOH / PP coextrusion film, PA / PVA / PP coextrusion film, and pet or aluminum foil to form more layers of composite film, but the number is not large, The four layer PET / AI / OPA / CPP cooking bag containing aluminum foil can meet all the requirements of cooking food. In addition, the materials that can be used in cooking bag include PVDC with high barrier property, PVA with high oxygen resistance, pen with high heat resistance and high barrier property, and special aromatic nylon MXD6
In general, after the contents are filled, the space is replaced with inert gases such as nitrogen or carbonate gas to prevent discoloration or oil oxidation of the contents. At present, this method is widely used. When these products are treated by the general cooking and sterilization method, due to the gas in the container, it is easy to expand, burst, damage the sealing film, and sometimes lead to the decline of commodity value and secondary pollution after sterilization. In order to solve these problems, in the whole process of cooking and sterilization, especially in the heating and cooling process, it is necessary to control the internal pressure of the container equal to that of the sterilization device.
Even for bagged products, in order to maintain the shape of millet, rice, noodles, etc., some products sometimes adopt the method of gas replacement. However, the situation that liquid food is sealed by suction after filling and the solid product is vacuum packed is still the mainstream. Liquid products with nitrogen replacement method can not find an advantage, on the contrary, from its hindering heat transfer situation, the disadvantage factor is greater. After the food filled in the sealed container is heated and sterilized, the "safe and delicious" food is provided to the consumer's table through normal temperature circulation. In fact, the most important thing is the "safety" of the food. It is very important to meet the "palatability" on the premise of ensuring the food safety.
There are many kinds of materials for food packaging bags of daily chemical packaging bag manufacturers, each has its own advantages and disadvantages, customers should choose according to their own products. Food packaging bags are generally composite packaging
Two layer composite: PA / PE or PA / rcpp; PET / PE or PET / rcpp
Three layer composites: PET / PA / PE; PET / Al / rcpp; PA / Al / rcpp
Four layer composite: PET / PA / Al / rcpp
Different types of food packaging bags can be customized according to customer requirements. The common bag types include three side seal, middle seal organ, side seal, suction mouth self-supporting bag, etc.
After reading the above content, we can find that the seemingly simple food safety bag has many functions. Food safety is related to our life, and food safety bag is the top priority of food safety. http://www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag