Search results for vacuum packaging split into two families of question: what the machine is called, and what the process actually does. This guide takes the second route for the two processes buyers meet most often above the product pages — thermoforming and MAP (modified atmosphere packaging). Thermoforming answers how the pack is formed and filled; MAP answers what replaces the air inside it. If you arrived at the "which one should I choose" question instead, that verdict comparison lives in vacuum packing vs MAP.
What is thermoforming vacuum packaging?
A thermoforming packaging machine — also searched as a thermoforming vacuum packaging machine or thermoforming vacuum packing machine — forms the package from a roll of film rather than from pre-made bags. It is the family to look at when volume is high and the pack format is stable enough to justify a dedicated line. The process runs in five continuous steps:
- Forming — the bottom web (roll-stock film) is heated until pliable, then formed into trays or pouches by a mould. Buyers care about tray depth, format changes and film width here.
- Loading — product is placed into the formed cavities, by hand or by an automated loader. How often you change products decides how much automation pays back.
- Vacuum and gas flush — air is drawn out of the cavity, and where the product needs it a protective gas is flushed in. Gas flush is configured per line, not assumed — see the MAP section below.
- Sealing — a top web is laid over the filled cavities and heat-sealed, closing each pack.
- Cutting and output — the sealed web is cut into individual packs and discharged, ready for downstream check-weighing, metal detection or outer packing.
Because forming, filling and sealing happen in one continuous operation, a thermoforming line suits high-volume, fixed-format production. The four machine families in this range — chamber, external, thermoforming and MAP — sit side by side on the vacuum packing machine category page.
What is modified atmosphere packaging (MAP)?
MAP changes the atmosphere inside a sealed pack. After — or instead of — drawing a vacuum, the pack is flushed with a protective gas mixture chosen for the product, so the air that would spoil it is replaced rather than merely removed. Typical mixtures draw on three gas families: nitrogen displaces oxygen and keeps the pack from collapsing, carbon dioxide slows microbial growth, and oxygen is kept deliberately where the product needs it, as with fresh produce and red meat. The right mix is product-specific — it follows the food, its moisture and fat, the pack format and the shelf life you are targeting — which is why a modified atmosphere packaging machine is configured per line rather than picked from a table.
What stays constant across products: contact surfaces are food-grade SS304, and the machine is built to order, as a standalone unit or integrated into a full line — as on our box-type MAP vacuum sealer. Gas supply and mixing are set up per installation; tell us your volume and utilities and we confirm the arrangement in writing. You will also meet controlled atmosphere packaging (CAP) — the same managed-atmosphere idea under another name; in equipment terms a controlled atmosphere packaging machine is the pack-level machine described here, not a storage-room control system.
Thermoforming vs tray sealer: which suits your line?
Both produce a sealed tray; the difference is where the tray comes from. A thermoforming machine forms the tray inline from roll-stock film; a tray sealer seals a pre-formed tray that has been filled separately. The trade-offs buyers weigh:
- Throughput — inline forming keeps a continuous beat, which suits high-volume production; a tray sealer runs at the pace of loading and sealing.
- Changeover — pre-formed trays let you switch formats by changing the tray; thermoforming needs a film and mould change, which pays off when formats are stable.
- Pack format — thermoforming takes depth and shape from the film; a tray sealer accepts a wider mix of ready-made trays.
- Consumables — roll-stock film is bought by the roll; pre-formed trays carry their own tooling and logistics cost.
Neither is universally better — the choice follows your volume, format stability and consumable supply. For the wider framework across all machine types, see how to choose a vacuum packing machine.
Vacuum, MAP, or skin packaging?
Three mechanisms, three different jobs inside the pack:
- Vacuum packing removes the air from the pack — simple, and the default for a wide range of products.
- MAP replaces the air with a protective mixture — the route when the product is sensitive to pressure or benefits from a managed atmosphere.
- Skin packaging uses the product itself as the mould: a skin film is drawn tight over it so the pack takes the product's shape — common for fresh meat and seafood where presentation matters, as on the skin vacuum packaging machine in this range.
Choosing between the three is a verdict comparison, and it is done properly in vacuum packing vs MAP — this page stays with what each process is.
Which products use each process?
Typical applications, by process:
- Thermoforming — high-volume, fixed-format lines; typical loads on thermoforming lines in this range include cheese, sausage, pickles, fresh meat, seafood and fruit jam.
- MAP — fresh produce and prepared trays, where a managed atmosphere protects quality and the pack is part of the shelf appeal.
- Skin — fresh meat and seafood, where the product's shape and color are the selling point.
- Plain vacuum — the broad middle: fresh and cured meat, poultry, seafood, cheese, rice and grains, pickled vegetables and frozen prepared foods.
These are typical fits, not absolute rules — pack format, shelf-life target and distribution all move the answer. The vacuum packing machine range covers all four families.
From concept to machine: what we build
Once the process is settled, the machine decision is next. Across the range you will meet the DZ series — the DZ800/2SB double-chamber build, the DZ-1100 continuous-rolling packer, the DZ-4S four-seal machine with customizable nitrogen flushing, and the DZR roll-stock thermoforming series (DZR620, DZR520, DZR420). Chamber sizes are custom — published examples run 400×400 to 1000×1000 mm — with food-grade SS304 contact surfaces, and the range is available CE-marked for the EU with ISO 9001 quality management in place; the exact certificate scope is confirmed in writing per order. Model-level detail lives on the product pages: the DZ800/2SB technical guide walks through the double-chamber build, and the vacuum packing line solution covers packing integrated with sterilization and freezing.
Tell us your product, packaging format and daily volume — we will recommend the model and chamber size, and confirm the quotation and certificate scope in writing.
Frequently asked
How does a thermoforming machine form and seal a pack? In five continuous steps: the bottom film is heated and formed into trays or pouches, product is loaded, air is drawn out (with gas flush where the line is configured for it), a top web is heat-sealed over, and the sealed web is cut into individual packs and discharged. Forming, filling and sealing happen in one operation, which is what makes the line high-volume.
What gases are used in MAP packaging? Mixtures typically draw on three families — nitrogen, carbon dioxide and oxygen. Nitrogen displaces oxygen and keeps the pack from collapsing, carbon dioxide slows microbial growth, and oxygen is kept deliberately where the product needs it. The right mix is product-specific and is set with the line configuration, not from a table — tell us the product and shelf-life target and we confirm the arrangement in writing.
Thermoforming vs tray sealer — what's the difference? A thermoforming machine forms the tray inline from roll-stock film, which suits high volume with stable formats; a tray sealer seals pre-formed trays, which suits mixed formats and lower volume. The choice follows throughput, changeover frequency and consumable supply.
Is MAP the same as vacuum packing? No. Vacuum packing removes the air from the pack; MAP replaces it with a protective gas mixture. The mechanisms differ, and so do the products they suit — the verdict comparison is in vacuum packing vs MAP.
Can thermoforming or MAP equipment run as part of a full production line? Yes. Both are normally installed alongside the rest of the packing range so infeed, discharge and control logic match — the box-type MAP sealer, for example, runs as part of a full line. Tell us the upstream and downstream steps and we map the layout; the vacuum packing line solution shows packing integrated with sterilization and freezing.
This guide explains packaging processes for buyers. Machine configuration, gas arrangement and certificate scope are confirmed in writing per order.