Think of the coffee packs with sharp corners that keep their shape like a brick when filled. Behind that look is often quattro seal packaging. It takes its name from the fact that all four vertical corners are formed by seals.
The four corners that set quattro seal apart
In a standard side gusset bag, the corners fold softly. In a quattro seal bag, each of the four vertical edges is sealed separately. These seals act as a skeleton for the pack:
- It keeps its shape when filled and even as it starts to empty.
- The corners look sharp and neat.
- The pack does not collapse under its own weight.
Why designers love it
Quattro seal offers two wide side panels in addition to the front and back. Because the seals clearly separate the panels, each one can be designed like a separate “page”: the brand on the front, story and usage information on the sides, and legal information on the back.
Logistics and shelf benefits
Stackability: The brick shape lines up without gaps in cartons and on shelves.
Shelf order: Products line up neatly side by side, making the shelf look tidier.
Durability: Corner seals reduce the risk of the pack losing its shape during transport.
Suitable products
- Whole bean and ground coffee (with valve options)
- Tea
- Flour and baking mixes
- Premium dry foods such as rice and pulses
- Pet food (medium and large pack sizes)
Available options
- One-way aroma valve
- Zipper
- Tear notch
- Carry handle (for large pack sizes)
Quattro seal or flat bottom?
Both offer a premium look. As a general rule, quattro seal stands out when a sharp shape and stacking order are the priority, while a flat bottom pouch is the choice when a completely flat base and box-like stance are required. Your pack weight and filling method will clarify the decision.
Frequently asked questions
Why is quattro seal so common for coffee? Coffee needs a pack that keeps its shape and can take a valve. Quattro seal meets both needs and gives the brand a strong presence on the shelf.
Which printing method is used? Rotogravure or flexo printing is used depending on the design and order. Porpack has 8-colour rotogravure and 6-colour flexo capacity.
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