An oxygen absorber, also known as an oxygen scavenger, is a small packet or sachet that is used to remove oxygen from a sealed container. It is commonly used in food packaging, pharmaceuticals, and other products that are sensitive to oxygen exposure.
Here are some key points about oxygen absorbers:
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Purpose: Oxygen absorbers are used to extend the shelf life of products by reducing or eliminating the presence of oxygen within a sealed package. Oxygen can cause deterioration, spoilage, or degradation of certain products, including food, pharmaceuticals, and sensitive electronic components.
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Working principle: Oxygen absorbers typically contain iron powder, salt, and an activated carbon component. The iron powder acts as a catalyst, reacting with oxygen to form iron oxide (rust). This process consumes the available oxygen in the packaging, creating a low-oxygen or oxygen-free environment.
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Types and sizes: Oxygen absorbers come in different sizes and oxygen-absorbing capacities to suit various applications. The most common type is the iron-based oxygen absorber, which is often used for food preservation. Other types include organic-based oxygen absorbers, which are used for certain pharmaceutical products.
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Packaging compatibility: Oxygen absorbers are usually packaged in airtight, moisture-resistant materials to prevent premature activation or deterioration. They are commonly made of a food-grade material that is safe for direct contact with food.
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Activation and usage: Oxygen absorbers are activated when exposed to air. Once the package is opened, the oxygen absorber starts to work, consuming oxygen and creating an oxygen-reduced environment. Therefore, it’s crucial to use the absorbers promptly and seal the packaging tightly after removing the required quantity.
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Effectiveness: The effectiveness of oxygen absorbers depends on several factors, including the size and number of absorbers used, the initial oxygen level in the package, and the permeability of the packaging material to oxygen. It’s essential to consider these factors and follow the recommended guidelines provided by the manufacturer.
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Precautions: Oxygen absorbers are not edible and should be kept out of reach of children and pets. If accidentally ingested, medical attention should be sought immediately. Additionally, it’s important to store oxygen absorbers in a cool, dry place to prevent premature activation.
When using oxygen absorbers for food preservation, it’s crucial to remember that they work in conjunction with proper packaging techniques, such as vacuum sealing or using oxygen-barrier films, to achieve the desired shelf life extension. It’s recommended to consult with packaging experts or follow guidelines provided by the oxygen absorber manufacturer to ensure effective and safe usage.
