Oxygen-absorbing packaging prevents food from spoiling by blocking the entry of outside oxygen into the package and removing oxygen from the package. In countries such as Japan, the United States and Australia, oxygen-absorbing packaging has been successfully used in food packaging to extend the shelf life of foods and control food quality and safety. Applications include built-in pouches, labels , polyester bottles, films, and caps. And padding, etc.
Built-in pouch type oxygen-absorbing packaging
90% of the commercial oxygen-absorbing packaging is a built-in pouch made of a highly breathable material with an active oxygen-absorbing component. When it is placed in the package together with the food, the oxygen in the package is activated by the built-in pouch. The oxygen component is removed. In 1977, Japan's Mitsubishi GasChemical Company launched Ageless in the food field, opening the era of commercial application of oxygen-absorbing packaging. The United States did not begin to apply oxygen-absorbing packaging until 1984. FreshPax is an oxygen-absorbing package developed by Multisorb Corporation of the United States to prevent spoilage of foods, medicines, etc., and effectively prevent oxidation of oils and vitamins.
Oxygen label
In 1991, Multisorb introduced the world's first iron-based oxygen-absorbing label, FreshMax. It can be affixed inside food packaging and minimizes the possibility of being ingested by consumers. FreshMax's outer layer can be printed , the inner layer can be in contact with food, and it is resistant to fat and water, and can be applied to a variety of meat and baked goods. In addition, the oxygen label is also ATCO developed by Standa, France.
Oxygen-absorbing polyester bottle
Developed by American BPAmoco, Amosorb is the world's first directly addable oxygen-absorbing resin, and its active oxygen-absorbing component is iron-based. Amosorb can be used not only as an inner layer material for multi-layer composite packaging materials , but also as a single-layer oxygen-absorbing bottle after being blended with a plastic resin before processing. In addition, the valOR series developed by Valspar in the United States, the Oxbar multi-layer oxygen-absorbing packaging developed by CrownCork & Seal in the United States, and the oxygen-absorbing blending resin of OSP developed by Chevron Phillips Chemical in the United States are all very effective oxygen-absorbing polyester bottles.
Oxygen absorbing film
Japan's ToyoSeikan Kaisha Company developed an iron-based additive-type oxygen-absorbing material in 1993 under the trade name Oxyguard, which is a multi-layered film, which is printed, barrier, and oxygen-absorbing layer from the outside to the inside. In contact with the food, the barrier layer prevents external oxygen from penetrating into the package. The oxygen in the package is removed through the food contact layer in the oxygen-absorbing layer, and oxygen absorption is activated by moisture. In addition, the company's CryovacOS1000 co-extruded multi-layer oxygen film using OSP technology, ShelfplusO2-2400 for PE film developed by Ciba Specialty Chemicals of Switzerland, and ShelfplusO2-2500 for PP film.
Oxygen cap and pad
The bottle cap and stopper with the oxygen-absorbing function developed by WR Grace of the United States under the trade name Darex, the active oxygen-absorbing component is ascorbic acid or sulfide, which can absorb the gaseous oxygen in the headspace of the bottle. Another oxygen-absorbing product of the company is the PureSeal cap liner. The oxygen-absorbing principle is the oxidation of ascorbate and the transition metal salt is used as a catalyst. Similar products include DarExtend, developed by Darex, and DarEval, which was developed jointly with EVALCA. DarEval is an EVOH-based oxygen-absorbing material used primarily for crown caps and as a barrier for multi-layer PET bottles. .
As the most widely used technology in active packaging, oxygen-absorbing packaging has formed a considerable market scale abroad, which can effectively guarantee food quality, extend the shelf life of food, and has a very promising development prospect.
The above content is selected from the 16th issue of “Printing Technology·Packaging and Decoration†of Keyin Media in 2012. For more journal content, please pay attention to the journal channel. The latest journal content clicks into the electronic journal channel of Keyin.com.
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