Application of deoxidizer packaging
Vacuum packaging can remove most of the oxygen in the packaging. However, due to the limitation of vacuum degree, a small amount of oxygen remains in the package. In addition, sealing composite flexible packaging may also be permeable to oxygen. Therefore, products that are sensitive to trace oxygen require further deoxygenation. In order to completely inhibit the mold, the oxygen inside the package must be<1%, then less than 0.5%. Deoxidizer sealing packaging, also known as deoxidizing packaging, is often written as FOA packaging. It refers to sealing the deoxidizer packet with the product in a packaging container with good barrier properties, so that the container maintains an 'oxygen-free' state (oxygen-free)<0.1%), a packaging method to protect the product. Deoxygenation sealing packaging is currently mainly used in the packaging of the following products: 1. Processed food. Deoxidizers can prevent the oxidation of fats and pigments in food, inhibit the growth and reproduction of aerobic microorganisms, and can be used to maintain the aroma of food, prevent spoilage, and prolong the shelf life. Such as deoxygenation packaging of fried foods, cakes, dried meat products, sausages, tea and seaweed, etc., food materials are all packaged with deoxidizer packaging machines, which not only packs fast, but also avoids the secondary infection of manual packaging. . 2. Grain grains. Deoxidizers can slow down the respiration of grains, inhibit the series of pests and molds, and delay the aging speed, thereby extending the shelf life. 3. Chinese medicinal materials, cultural relics, textiles. It can prevent pests and molds, and prevent discoloration of pictures. 4. Precision instruments, electronic equipment, ordnance. Anti-mildew and anti-rust. Deoxygenation packaging has developed rapidly in industrialized countries since the mid-1970s, and my country began its industrial application in the 1980s. It has the advantages of simple preparation, convenient use, hygienic safety, low price and good product protection effect. It is a packaging technology worthy of popularization and application, and has been widely used in food packaging in my country. When choosing the type and amount of deoxidizer, in addition to product characteristics, such as the water activity AW of food, the following points should be paid attention to: 1. Storage and opening of deoxidizer. The deoxidizer is packaged in air permeable pouches, such as paper/PE bags, and small holes can be made on the pouches; the pouches are then filled with a certain amount of oxygen permeability.<10ml/m2 (101325Pa). 24h high barrier performance bag, such as PE/PA/PE bag seal for show. The deoxidizer packaged in large bags should be placed in a cool place and the shelf life is one year. Generally, when the deoxygenation bag is taken from the big bag, it should be put into the package immediately after opening, so as not to affect the use effect. After the iron-based deoxidizer is taken out from the big bag, it can be used within 5 hours at 25~30 degrees Celsius and 88% RH without affecting the effect. 2. Place the oxygen detection indicator. The deoxidizing effect in the package, especially the deoxidizing packaging effect of those instruments, ordnance, cultural relics that have been sealed for a long time, can be sealed with oxygen detection indicator at the same time, so as to observe and inspect, and take timely measures. 3. Security. In food and drug packaging, the deoxidizer should be specially marked to avoid accidental ingestion, and the deoxidizer packet should not be in direct contact with the food during packaging.
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