Aseptic bags for tomato paste are multilayer liner bags that sit inside a standard 200–220 liter drum, holding the paste sterile and shelf-stable at ambient temperature. They replaced cans and frozen totes for bulk paste because they protect color, flavor, and vitamin content without preservatives or refrigeration, while cutting shipping weight. If you buy or process bulk paste, the hard part isn’t whether to go aseptic. It’s choosing the right barrier film and matching it to your fill process and shelf-life target.
Why Tomato Paste Ships in 220L Aseptic Bag-in-Drum
Tomato paste ships in 220-liter aseptic bag-in-drum because the format keeps high-acid, oxygen-sensitive paste sterile and shelf-stable at ambient temperature without preservatives. The flexible liner carries the oxygen and light barrier; the drum gives stacking strength. Together they cut weight versus steel cans and protect the deep red color through long export transit.
Paste oxidizes quickly once oxygen reaches it, dulling both color and flavor and degrading lycopene. A sealed, high-barrier liner slows that reaction to the point where the product stays stable for a year or more on a warehouse floor. Because the 220 L drum is the global bulk standard, holding about 200 kg of paste, a well-sized 无菌袋 drops straight into the drums, pallets, and handling equipment processors already run. Smaller 20 L to 125 L bags cover sampling and short runs; see our tomato paste packaging page for the full range.
Aseptic Filling vs Retort and Hot-Fill Canning
The distinction matters because it decides how much heat your product takes. In aseptic processing, the paste and the packaging are sterilized separately, then the sterile paste is filled into the sterile bag inside a sterile zone and sealed before anything can recontaminate it. A can, by contrast, is filled first and then cooked in a retort with the product inside.
That difference shows up in quality. Aseptic filling uses a short, high-temperature treatment that sterilizes the paste in seconds, so color, flavor, and nutrients survive better than they do under the long heat soak of a retort cook. Hot-fill into a barrier bag sits in between: the paste goes in hot enough to commercially sterilize the liner surface, then cools in place. For heat-sensitive tomato products headed for long storage, true aseptic cold-fill preserves the most quality, which is why it dominates bulk export paste.
Barrier Choice: Metallized, EVOH or Foil
The film structure is the single biggest spec decision, and it’s a direct trade between protection and cost. Here is how the barrier levels compare in our 220 L aseptic bags:
| 障碍级别 | 关键层 | OTR（cc/m²/24h） | 典型用途 |
|---|---|---|---|
| 标准版 | PE / MPET 12 / PE (metallized) | <1 | 果汁，一般流质食物 |
| 高 | PE / MPET 12 / EVOH 70 / PE | <0.5 | Purée and passata, long shelf-life foods |
| 超高 | PE / ALU 7 / PA 15 / PE (foil) | <0.01 | Tomato paste for long export storage |
For tomato paste at 28–30 or 36–38 Brix in a 220 L drum, we specify the ultra-high barrier foil bag, since paste shows any oxygen ingress as browning. Purée and passata usually run in a high-barrier bag. Lower barriers make sense only for shorter storage windows you have validated. If you’re still comparing rigid and flexible formats at this stage, our overview of 无菌纸盒包装 against bag-in-box lays out where each one earns its cost.
Filling and Sterilization for Tomato Paste Bags
Aseptic liners arrive pre-sterilized and sealed, so the bag itself never passes through your heat process. Our bags are irradiated before shipment and arrive sealed. Irradiation is a cold process, so it sterilizes the finished bag and spout without heat damage, which suits a component that carries a heat-sensitive barrier layer.
On the line, the spout or fitment is the control point. A 2-inch screw cap suits pumped discharge of thick paste, while a 1-inch pressure valve suits aseptic filling lines. A clean connection between the sterile filler head and the bag spout is what keeps the aseptic chain intact, and a poorly seated fitment is where most contamination gets in. We manufacture aseptic bags, spouts, and taps alongside bag-in-box filling machines, so the liner spec and the filler can be matched rather than forced together after the fact. Confirm with your supplier which fill temperature window the liner is rated for before you commit a line to hot-fill or cold aseptic.
Handling Aseptic Bags at the Receiving Plant
A sterile bag is only as good as its condition on arrival, and incoming inspection is where buyers catch problems before they hit the batch. Work through a short checklist on every lot:
- Inspect the outer drum or carton for crush damage, punctures, or moisture that signals a compromised liner inside.
- Check the bag film and seams for pinholes, creases that have cracked, and any sign of product weep around the spout.
- Confirm the spout cap and seal are intact and factory-closed, not loose or previously opened.
- Verify the lot and sterilization documentation match the shipment, and store bags cool, dry, and out of direct sunlight until use.
None of this requires lab equipment, but a documented visual and seal check at receiving is the cheapest insurance against filling good paste into a bag that quietly failed in transit. For sterility-critical runs, add a leak or vacuum check to the protocol and agree the acceptance criteria with your supplier in writing.
Bulk Formats Beyond the 220L Drum
The drum liner isn’t the only option, and volume usually decides. For very large runs, our aseptic bags go up to 1,400 L for bins and IBCs, which suits processors filling large blending tanks. We also produce IBC liners and FIBC liners for bulk non-aseptic products.
At the other end, smaller or retail-facing volumes often move to flexible pouches with their own fitments. If your paste is heading toward portioned or shelf-ready formats, our look at aseptic pouch packaging covers when a pouch beats both the bag and the carton.
常见问题解答
Can I store tomato paste in a can?
Yes, cans work, but retort canning cooks the paste in-container, which can dull color and flavor, and steel is heavy to ship. Aseptic bag-in-drum keeps bulk paste shelf-stable without that long heat soak.
什么是无菌食品包装？
Aseptic food packaging is a method where the product and the container are sterilized separately, then the sterile product is filled into the sterile container in a sterile zone and sealed. This keeps it shelf-stable without preservatives or refrigeration.
Which barrier level is best for tomato paste?
For paste in 220 L drums headed for long export storage, an ultra-high barrier aluminum foil bag. Purée and passata usually run in a high-barrier bag.
What size aseptic bag is used for tomato paste?
The standard is a 220 L bag-in-drum holding about 200 kg of paste. Smaller 20 L to 125 L bags are used for samples and short runs.
Before you lock a spec, match the barrier film to your actual shelf-life and transit conditions rather than defaulting to the cheapest or the strongest option. If you want help sizing that trade for a specific paste grade and route, talk to us at Hansin Packing about barrier structure, fill temperature, and drum or IBC volume, and we’ll match the liner, spout, and filling setup to your line.
