Custom Printed Tin-Tie Coffee Bag

What this pack is

This is a flat bottom bag or side gusset bag built for roasted coffee. The wall is a three-layer laminate: a matte film outer layer, an aluminized layer, and a PE inner layer, at 120 micron. The matte film gives a soft-touch finish that resists scuffing. The aluminized layer blocks light and slows moisture and oxygen ingress. The PE inner layer is food-grade and heat-sealable, so it forms the product-contact surface and the closure on your filling line.

The flat bottom construction has a rectangular base that holds its shape once filled. The side gusset version folds flat before filling and expands as the coffee settles. Both stand unaided on a shelf, which reduces the labour and secondary packaging needed for display. The 120 micron gauge is heavy enough to hold creases and block light, but still flexible enough to run on common vertical form-fill-seal and premade pouch fillers. Thickness can be adjusted if your roast profile or fill weight needs a different stiffness.

The laminate is not a high-barrier foil structure. It is a practical middle ground: aluminized layers slow oxidation compared with clear film, but they do not match a full aluminium foil laminate for long-term storage. For roasted coffee sold within a normal retail cycle, that trade-off is usually acceptable and keeps the pack lighter and more flexible.

Features called out

A one-way degassing valve sits on the front or back panel. It lets carbon dioxide escape from freshly roasted beans while blocking outside air from entering. Without a valve, CO2 builds up inside a sealed pack and can balloon or burst the seams. The valve is a small, low-profile component that does not interrupt the print area.

The zipper is a press-to-close track positioned below the top seal. Tearing off the seal exposes the zipper, so the bag can be resealed after opening. A tear notch is placed at the same level to start the tear cleanly. This keeps the coffee fresher between brews and avoids the need for a separate clip.

Printing is high-definition digital. Digital print holds fine detail and small type, which suits origin stories, roast dates, and small-batch branding. It also avoids the plate costs of rotogravure, so short runs are economical. The matte film outer layer takes ink well and gives a non-reflective finish that reads as premium on a dark shelf.

The base is self-supporting. A flat bottom bag or an expanded side gusset bag stands upright without a shelf-ready tray. That saves space in storage and on the shelf, and it keeps the front panel facing the shopper.

Where it is used

The bag suits whole bean and ground coffee in retail and foodservice sizes. Typical fills are 250 g, 500 g, and 1 kg, though the flat bottom format also works for larger catering packs. The valve and zipper are most useful for whole bean, where CO2 release continues after packing. Ground coffee also benefits from the valve, but the zipper is the main reclosure feature.

Beyond coffee, the same structure is used for loose-leaf tea, cocoa, dried fruit, nuts, and specialty dry goods that need light and moisture protection. The side gusset version is often chosen when the pack needs to ship flat before filling. The flat bottom version is chosen when shelf presence and stackability matter most.

Filling, sealing and handling

Flat bottom and side gusset bags are usually filled on premade pouch machines or by hand for small batches. The top seal is heat-sealed through the PE inner layer. Seal temperature, pressure, and dwell time need to be set for the laminate and the fill weight; too much heat can distort the matte film, too little leaves a weak seal. The valve should be positioned so it is not covered by the top seal or the zipper.

For coffee, fill weight and degassing rate determine how much headspace to leave. A pack filled too full can stress the base corners. A pack filled too loosely will not stand well. If you run a valve, check that the valve seat is clear of grounds before sealing.

The honest trade-off is barrier versus recyclability. The aluminized laminate gives good light and moisture protection at a moderate cost, but it is a multi-material structure and is not widely recyclable. If recyclability is a priority, mono-material PE or PP structures are available, but they generally offer lower oxygen and moisture barrier than aluminized laminates. Choose based on your shelf-life target and the recycling infrastructure in your market.

Minimum order quantity is low for digital print: from 100 pcs for pouches. Lead time for digital print runs is 10–15 working days after artwork approval. Rotogravure printing is available for larger runs, with higher MOQs and a 20–25 working day lead time. Free stock pouch samples are available; you pay courier only.