Stand-up pouches rely on their bottom construction for stability and shape. The two most common options are K-seal and Parabolic gusset, and each performs differently depending on pouch size and filling weight.

K-Seal Bottom
A K-seal has angled bottom corners that reduce stress on the seals and create a wide, stable base.
Best for medium to large pouches and heavier products.

Key benefits:

• High stability and volume efficiency
• Ideal for 0,5–3 kg formats
• Strong performance in mono-PE and mono-PP structures

Parabolic Gusset
A Parabolic gusset has a rounded, curved bottom that gives the pouch a softer shape.
Best for smaller formats with lighter fills.

Key benefits:

• Premium look with a smooth, rounded base
• Ideal for 20–300 g pouches
• Natural shaping when filled

Summary

• K-seal: Strong, stable, and optimal for heavy or high-density products.
• Parabolic gusset: Elegant, soft design suited for lightweight, small-format pouches.

Qpack helps you choose the right bottom construction for your product, ensuring performance, stability, and shelf impact.