Change the air,
change the clockModified atmosphere packaging replaces the air in the sealed tray with a gas mix matched to your product — extending shelf life without additives. Barrier materials in stock, seals validated.

Food spoils through two oxygen-driven mechanisms: oxidation — fats going rancid, colours fading — and the growth of aerobic microorganisms. Modified atmosphere packaging attacks both at the source. By evacuating the ambient air (roughly 21% oxygen) and replacing it with a mix dominated by carbon dioxide and nitrogen, the pack starves oxidation and actively suppresses bacterial and mould growth. The shelf-life gain depends on the product, but the principle is universal: the atmosphere does chemically what preservatives would otherwise do — which is why MAP is the backbone of clean-label fresh food.

There is no universal MAP recipe — the mix follows the product's biology. High-CO₂ mixes suit protein and poultry, where microbial suppression is the priority. Red meat is the famous exception: it needs deliberately high oxygen to keep the red oxymyoglobin colour consumers expect. Bakery runs on CO₂/N₂ to hold mould at bay without drying. Respiring produce needs a breathable equilibrium rather than a fixed mix. Hard cheese, pasta and snacks typically take a simple nitrogen flush. We define the target mix and residual-oxygen specification with you — and the recipe is then locked to the tool on the line.

A MAP pack is specified by its residual oxygen: the percentage of O₂ left inside after flushing and sealing. Getting from 21% to a low single-digit or sub-percent level is a machine capability — evacuation depth, flush time, chamber design — and holding it over shelf life is a materials capability. Verification is part of production, not a one-off: headspace gas analysis on samples confirms the mix, and the result is documented per batch alongside the seal-integrity checks.

Fresh fruit, vegetables and salads are alive — they keep respiring after packing, consuming oxygen and producing CO₂. Seal them behind a total barrier and they suffocate into off-flavours; leave them open and they wilt. Equilibrium MAP solves this with controlled permeability: the film's transmission rate — sometimes tuned with micro-perforation — is matched to the product's respiration, so the atmosphere inside settles at a steady, beneficial mix. It's the opposite discipline of high-barrier MAP, and it's why "which film?" has no answer until "which product?" is asked. Both regimes run on the same trays and the same line — only the lidding specification changes.

Standard packaging plastics are not gas-tight — oxygen migrates through them slowly but steadily. A MAP pack therefore needs barrier materials: trays with an EVOH core or coated structures, and lidding films with matching barrier performance. The measure is OTR — oxygen transmission rate — and it must be matched to the shelf-life target: a 21-day chilled pack tolerates more transmission than a 12-month ambient one. Anti-fog additives in the lidding keep condensation from clouding the pack in the chilled cabinet. All of it is stocked and specified in our materials range.

MAP keeps the pack's shape and presentation — right for delicate products and anything that must look composed on the shelf. Vacuum removes the atmosphere entirely and pulls the film onto the product — maximum oxygen exclusion for robust items. Skin packaging is the premium hybrid: the film is drawn tight over the product against a flat tray, giving vacuum-level shelf life with a presentation that lifts the product toward the customer. All three run on the same line here, so the choice is driven by the product — not by which machine happens to stand on the floor.

Packaging is often framed as an environmental cost, but for fresh food the arithmetic usually runs the other way: the footprint of wasted food dwarfs the footprint of the pack that would have saved it. Extending shelf life from days to weeks cuts waste across the whole chain — retail, logistics and household. Combined with recyclable mono-material barrier structures and clean skeleton recycling from die cutting, MAP is one of the strongest sustainability tools in food packaging.

MAP has traditionally been the province of large tray-sealing lines — fast, but heavy in floor space, changeover time and minimum batch size. Our approach scales it down without giving up control: the gas flush happens in the seal station of the same compact line that forms and cuts the pack, the mix and flush time are part of the tool's recipe, and changeover to another product is a tool swap, not a rebuild. That makes modified atmosphere realistic for specialty producers, pilot runs and product launches — batch sizes where the shelf-life gain matters commercially but a dedicated MAP hall never would. See the Nova 360 for the line behind it.

A MAP pack isn't finished when it seals — it's finished when the shelf-life claim on the label is proven. That proof is a study: packs produced under production conditions, stored at the intended temperature, and opened at intervals for microbiological counts, headspace analysis and sensory evaluation. The packaging variables under test are exactly the ones on this page — gas mix, residual oxygen, barrier performance, seal integrity — which is why the study should run on the real pack from the real line, not a lab approximation. We produce validation batches for precisely this purpose, and the batch documentation feeds straight into your quality file.

MAP protects the product from the atmosphere, but it cannot undo contamination that goes into the pack before the lid seals. The gas mix suppresses microbial growth; it does not sterilise. So the quality of a MAP pack is set as much in the seconds before sealing as in the flush itself: a clean seal area free of product debris, film handled without contamination, and a filling step that keeps the initial microbial load low. On our line the forming, filling window and sealing sit in one flow under controlled conditions, which shortens the exposure and removes the hand-offs where contamination usually creeps in. Good atmosphere plus a clean start is what turns a shelf-life claim into a shelf-life fact — one without the other disappoints.