Modified Atmosphere Packaging (MAP) or gas flushing is a proven and natural method that extends the shelf life of food products. By replacing the air inside food packaging with a specific gas or gas mixture, MAP slows spoilage and preserves taste, safety, and appearance. Combined with suitable packaging materials and controlled temperatures, MAP helps keep food fresher for longer.
How MAP Protects Food
MAP combats food spoilage caused by:
- Microorganisms: Bacteria, yeast, and mould growth is slowed by reducing oxygen levels.
- Enzymes: While enzymes promote ripening in produce, MAP gases help regulate their activity.
- Oxidation: By replacing oxygen, MAP prevents rancidity, discoloration, and stale flavours.
- Light Exposure: MAP packaging can provide protection from harmful light exposure.
- Pests: While gases alone can't stop insects or rodents, MAP packaging creates a barrier that deters pests.
- Physical Damage: Nitrogen-filled bags cushion delicate items like chips, preventing crushing.
- Temperature Control: MAP gases combined with insulated packaging help regulate internal temperatures.
- Time: MAP delays the natural processes that lead to spoilage, giving food products a longer shelf life.
Common MAP Gases and Their Uses
- Nitrogen (N2): Nitrogen is a tasteless and odourless inert gas used to displace air and as a filler gas when mixed with other packaging gases. It is also used for packaging potato chips, cereals, and other dry foods like cocoa powder, coffee, powder milk, and nuts. It is also a filler gas in many beverages, from beer to wine to soft drinks and mineral waters.
- Carbon Dioxide (CO2): Slows oxidation and microbial growth; often paired with nitrogen to stabilize packaging.
- Nitrous Oxide: Used in aerosol creams and explored for packaging fish fillets.
- Carbon Monoxide (CO): Preserves meat's colour and tenderness (restricted in some regions).
- Argon (Ar): An alternative to nitrogen, though less common due to cost.
- Oxygen (O2): Used selectively to maintain the red colour of fresh meat.
- Hydrogen (H2) & Helium (He): Employed mainly for leak detection in packaging systems.
Why MAP Matters
MAP extends food shelf life up to five times longer, reducing spoilage and minimizing food waste. By maintaining product quality, taste, and texture, MAP reduces the need for artificial additives and preservatives. This increased lifespan enables food manufacturers to expand distribution, enter new markets, and reduce costs by minimizing losses.
Modified Atmosphere Packaging is a smart, effective solution for improving food longevity and ensuring products remain fresh and appealing to consumers.
At Oxymed, we provide high-quality gas solutions tailored for Modified Atmosphere Packaging, ensuring food remains fresh, safe, and visually appealing for extended periods. Reach out to Oxymed for your MAP needs so that your businesses can confidently preserve food integrity while expanding your market reach.
