Kraft Paper Coffee Bag with Degassing Valve

What this bag is

This is a kraft paper coffee bag designed to protect roasted coffee from the main causes of staling: oxygen, moisture and light. The outer kraft paper layer gives a natural, matte finish that takes print well and feels substantial in hand. Behind it sits an aluminised film that blocks light and resists moisture ingress, so the bag holds its internal environment through storage and transport. The structure is food-grade throughout, which means every layer that touches the beans is approved for direct contact. For a roaster, the practical effect is a pack that keeps coffee closer to its roast profile for longer, without the glossy plastic look that some retail shelves reject.

Features that matter on the shelf

The one-way degassing valve is the central functional feature. Freshly roasted coffee releases carbon dioxide for several days after roasting. Without a valve, that gas builds inside a sealed bag and can balloon or burst the pack. The valve lets CO2 escape while restricting outside air from entering, which limits oxidation. It also helps prevent the bag from bloating on the shelf, keeping the pack flat and stackable.

The resealable zipper uses a concave-convex interlocking profile. It opens and closes repeatedly without losing grip, so buyers can reclose the bag after each use rather than transferring beans to another container. That repeated seal is what preserves aroma between brews.

The aluminised inner film provides the light and moisture barrier. Light accelerates oxidation in coffee oils, and moisture degrades texture and flavour. The metallised layer addresses both without adding significant weight.

The materials include recyclable and environmentally friendly options. Kraft paper, PLA and PBS are available, and the construction can be specified to meet international environmental and food safety standards. The exact certification depends on the chosen material combination and the manufacturing partner's current certificates, which we confirm per order.

Where it is used

This bag suits whole bean and ground coffee across retail and wholesale formats. Common sizes range from 250 g and 500 g retail packs to 1 kg and larger bulk bags, though the structure can be scaled to other fill weights. The kraft paper face is popular with specialty roasters who want a natural look that still carries a full-colour print. Beyond coffee, the same construction works for loose-leaf tea, dry snacks such as nuts and granola, and other products that benefit from a valve or a resealable closure. The bag can be printed in custom colours and artwork, and the valve position is typically placed on the front panel away from the fill seam.

Filling, sealing and handling

These bags run on standard vertical form-fill-seal or pre-made pouch filling lines. The top seal is heat-sealed after filling; the zipper sits below the seal line, so the bag is opened by tearing or cutting above the zipper and then resealed with the interlocking strip. The valve should be kept clear of the seal area and not compressed during packing. For roasters, a common trade-off is between the kraft paper look and maximum barrier: aluminised film gives good light and moisture protection, but if you need an all-polyolefin recyclable structure, the barrier performance changes and you should confirm the shelf-life target with your packaging supplier. Lead time for digital print runs is 10-15 working days after artwork approval; rotogravure runs take 20-25 working days. Low MOQ starts from 100 pcs for pouches with digital printing, or 10,000 pcs with rotogravure. Free stock pouch samples are available; you cover courier only.