Modern consumers increasingly prefer products with short ingredient lists and minimal additives, which places higher demands on packaging’s preservation performance.

For most food and beverages, PET plastic packaging alone does not provide sufficient freshness protection. From the moment a product leaves the factory until it reaches the consumer, oxygen is constantly present—both as residual oxygen initially trapped inside the package and as oxygen that continuously permeates from the outside. The more oxygen the food or beverage is exposed to, the faster oxidative degradation occurs. Oxidation alters flavor and colour, directly affecting consumer purchase decisions and repeat purchases.

YORK Oxygen Absorber: Active Oxygen Scavenging that Reduces Oxygen Transmission Rate by 80-99%

Plastic oxygen absorbers offer a solution to oxidative product deterioration. YORK Oxygen Absorber actively consumes residual oxygen inside the package through a chemical mechanism, achieving a technological upgrade from “passive defence” to “active scavenging”. At the same time, when integrated into the plastic packaging, the oxygen absorber hinders oxygen permeation through the container wall, reducing the overall oxygen transmission rate by 80-99%, thereby providing long-term barrier protection for the contents.

YORK Oxygen Absorber technology is applicable to both PET and polyolefin packaging and has already been adopted by several beverage and alcoholic drink brands.

Working Principle of the Oxygen Absorber

This technology highly concentrates active oxygen-scavenging ingredients in a polymer carrier, which is then integrated into the bottle wall through compounding and blow-moulding. It relies on chemical reactions and particle orientation to achieve both active and passive oxygen barrier effects.

Oxygen Barrier Performance – Comparative Data

The figure below illustrates the oxygen concentration inside bottles under four conditions: blank PET bottle, 2% ActiveFresh Oxygen Absorber, 2% ProBarrier Oxygen Absorber, and 2% Crystal Oxygen Absorber. It clearly demonstrates the differences in controlling internal oxygen levels.

Compared with the blank PET bottle, all bottles containing oxygen absorbers show a significant reduction in oxygen content.

Core Applications of Oxygen Absorber in PET Packaging

1. Beer Packaging

When PET is used for beer bottles, its limited gas barrier properties can lead to loss of carbonation and oxidative off-flavours, seriously shortening the beer’s shelf life.

Oxygen absorber technology, integrated into the PET bottle wall, effectively absorbs both the oxygen that permeates through the wall and the residual oxygen inside the bottle, significantly delaying oxidative deterioration and preserving the beer’s fresh taste.

2. Tea Beverages

The active components in tea, such as polyphenols, are highly susceptible to oxidation, which darkens the liquor colour, imparts astringency, and diminishes aroma.

By continuously scavenging oxygen within the PET package, the oxygen absorber maintains the clear colour and mellow taste of the tea liquor. This technology gives tea brands greater flexibility in their market strategies, especially for “clean-label” products.

3. Fruit Juices and Functional Beverages

Fruit juices and functional drinks are rich in vitamin C, natural pigments, and flavour compounds that are extremely sensitive to oxygen. Exposure to oxygen causes vitamin degradation, colour fading, flavour loss, and nutrient depletion.

Integrating an oxygen absorber into PET packaging actively removes internal oxygen, providing reliable protection for pure juices, blended juices, and beverages with added functional ingredients.

4. Dairy Products

Milk and yoghurt also suffer from quality deterioration due to oxidation. Lipid oxidation produces undesirable rancid flavours, while protein oxidation can affect texture and nutritional value. The use of oxygen absorbers in PET-packaged dairy products effectively extends shelf life and improves flavour retention.

Advantages of Oxygen Absorber Technology

1. Long-Term Oxygen Scavenging Capacity

High-performance oxygen absorbers provide both short-term and long-term oxygen removal. Test data show that PET bottles using YORK Oxygen Absorber technology can maintain very low oxygen levels for over 300 days. In contrast, untreated PET bottles maintain acceptable oxygen levels for less than one month. This clearly demonstrates the exceptional long-term freshness-preserving performance of the oxygen absorber.

2. Food Safety and Regulatory Compliance

Food-contact-grade oxygen absorbers must strictly comply with food safety regulations in various countries. YORK Oxygen Absorber meets both Chinese and international food-contact standards, ensuring that it provides excellent barrier protection without compromising the safety or quality of the contents.