Custom Flat Barrier Pouches For Food

What this flat pouch is

This is a flat, three-side-seal pouch built from a matte film, pure aluminium foil and a PE inner layer. The 140 micron thickness is a total laminate caliper, not a single film. That matters because each layer does a different job: the outer matte film carries the print and resists scuffing, the aluminium foil blocks light, oxygen and water vapour, and the PE layer provides the heat-seal surface that closes the pouch on a filling line. The matte finish also cuts glare, so printed text and fine linework stay readable under shop lighting.

The aluminium foil core is the reason this structure is chosen over clear laminates. Light accelerates oxidation in coffee and tea, moisture turns dried fruit and nuts soft, and oxygen shortens shelf life in snack products. A foil layer interrupts all three. The trade-off is that foil laminates are not recyclable in most kerbside streams. If recyclability is a priority, mono-material PE or PP structures are available, but they will not match the barrier of a foil build at the same thickness.

Features and closures

The self-sealing strip uses a concave and convex occlusion profile. That is a press-to-close zipper: the two ribs interlock along the full width of the pouch and can be opened and closed many times without losing grip. It suits products that are consumed over days or weeks rather than in one sitting. The pouch can also be supplied with a tear notch above the zipper so the top is removed cleanly on first open, and with a hang hole if it needs to sit on a peg.

Printing is high-definition. Fine type, gradients and photographic images reproduce clearly on the matte outer film, which gives the pack a more premium shelf presence than a gloss or unprinted pouch. The print method can be rotogravure for long runs or digital for shorter runs, and the artwork is approved before production starts. Windows, one-way degassing valves, spouts and carry handles can be added if the product needs them, though the standard flat pouch does not include these unless specified.

Where it is used

The structure is aimed at dry food goods: tea, coffee, snacks, nuts and dried fruit. Flat pouches work well for these because they stack tightly in cartons and retail shelves, and the foil barrier protects aroma compounds in coffee and tea as well as texture in nuts and dried fruit. Common fill weights run from small single-serve sachets up to larger sharing packs, and sizes are fully customizable. The same pouch format is used for contract manufacturing runs where a brand needs a consistent pack across several SKUs.

Filling, sealing and handling

Flat pouches run on standard form-fill-seal or pre-made pouch filling lines. The PE sealant layer seals at typical heat-seal temperatures, and the seal area must be kept free of product, especially fine powders like tea dust or coffee grounds, or the seal will channel. The zipper profile sits below the top seal, so the fill opening is above it. If a degassing valve is added for roasted coffee, it must be positioned on the front panel away from the seal and the fill path.

Minimum order quantities depend on the print method. Digital printing starts at 100 pouches, while rotogravure starts at 10,000 pouches. Digital runs ship in 10-15 working days after artwork approval; rotogravure takes 20-25 working days. Stock pouch samples are free, with the customer covering courier only. The foil laminate is stiff and does not flex as much as a clear PE pouch, so it holds its shape on shelf but may need a slightly larger carton allowance.