There are also various types of absorbent packaging, such as MoistCatch films by Kyodo Printing, desiccant packaging by Onyx Specialty Papers, and FreshWell rigid trays by Aptar. Examples of common commercial scavenger pads and sachets that absorb moisture from food include Dri-Loc by Novipax, absorbent pads by Thermasorb, and MeatPad by McAirlaid’s. Moisture scavengers control moisture in the headspace of a package and absorb liquid weeping from food, which extends product shelf life. PEAKfresh by PEAKfresh USA, Green Bags by Evert Fresh, Ethyl Stopper by Profresh Systems, and Bio Fresh by Grofit Plastics are other ethylene-scavenging products that are on the market. In addition, the incorporation of 1-MCP in corrugated linerboard eliminates the need for sachets and allows for more seamless and consistent produce distribution. FruitBrite by Hazel Technologies releases 1-MCP to diffuse ethylene blockers within the headspace of packaging during distribution. In addition, the compound 1-methylcyclopropene (1-MCP) is commonly used in the washing and processing of fresh produce and to block ethylene receptors and slow senescence. Regardless of whether ethylene-absorbing sachets contain zeolite or potassium permanganate, they absorb ethylene and moisture to reduce senescence and release sulfur dioxide if water comes in contact with the sachet pads that contain sodium metabisulfite salt. They are typically available in sachet form and can be integrated into the package structure. Ethylene scavengers extend the shelf life of produce by slowing the ripening process and senescence. The ability for consumers to activate oxygen scavengers within an opened resealable package is an emerging development in this area. Oxygen-absorbing liners on the underside of beer closures, such as the Carlsberg FreshCap, are said to increase the shelf life of beer by 15%. These substrates are incorporated into polymer structures as light-sensitive dyes or sacrificial unsaturated dienes. The most common substrate in oxygen scavengers is iron followed by ascorbic acid and other substrates. Oxygen absorbers stall oxidation and inhibit microbial growth. The Carlsberg ZerO2 cap contains an oxygen scavenger (in the cap) that is said to increase the shelf life of beer by 15%.
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