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Often the oxygen absorber or scavenger is enclosed in a porous sachet or packet but it can also be part of packaging films and structures. [4] Others are part of a polymer structure. [5] Oxygen absorbing chemicals are also commonly added to boiler feedwater used in boiler systems, to reduce corrosion of components within the system. [6]
On the other hand, active MA involves the use of active systems such as O 2 and CO 2 scavengers or emitters, moisture absorbers, ethylene scavengers, ethanol emitters and gas flushing in the packaging film or container to modify the atmosphere within the package.
Other metals, such as platinum or palladium can also be used. Organic oxygen scavengers can also be applied, such as tocopherols, unsaturated hydrocarbons, ascorbic acid, and oxygen scavengers based on enzymes or microorganisms. Newer systems are on cards or can be built into package films or molded structures. [8]
Most lower pressure systems (lower than 650 psi (4,500 kPa)) use non-volatile treatment programs. The most commonly used oxygen scavenger for lower pressure systems is sodium sulfite (Na 2 SO 3). It is very effective and rapidly reacts with traces of oxygen to form sodium sulfate (Na 2 SO 4) which is non-scaling. Most higher pressure systems ...
Specialized packaging is needed to regain and even extend that shelf life. Packaging includes tray, [4] absorbent pad (meat diaper), specialty plastic films, [5] etc. Oxygen scavengers and modified atmosphere packaging are used to keep the products visually appealing and consumer safe. [6] [7]
Modified atmosphere/modified humidity (MA/MH) packaging is a technology used to preserve the quality of fresh produce so that it can be sold to markets far away from where it is grown, extend the marketing period, and to help suppliers reduce food waste within the cold chain. Commercial examples of MA/MH include sea freight of Galia and ...
Packaging engineering, also package engineering, packaging technology and packaging science, is a broad topic ranging from design conceptualization to product placement. All steps along the manufacturing process, and more, must be taken into account in the design of the package for any given product.
A hermetic seal is any type of sealing that makes a given object airtight (preventing the passage of air, oxygen, or other gases). The term originally applied to airtight glass containers but, as technology advanced, it applied to a larger category of materials, including metals, rubber, and plastics. Hermetic seals are essential to the correct ...