Glossary index

Folder-Gluer Process (Folding and Gluing)

The folder-gluer process is the converting stage in cartonboard manufacturing in which a flat die-cut blank is folded along pre-scored crease lines and glued at designated bonding points to form its final three-dimensional structure.

Technical Description

After printing and die-cutting, the flat carton blank is fed into a folder-gluer machine that:

• performs pre-breaking of crease lines to prevent cracking
• folds panels and flaps according to the structural layout
• applies adhesive (typically PVA cold glue or hot-melt)
• compresses and conveys the finished cartons to the delivery section

The result is a carton that is either flat-packed or partially erected, ready for shipment or filling operations.

Types of Applications

• Straight-line cartons (4- and 6-corner)
• Crash-lock bottom cartons
• Automatic bottom cartons
• Window patching applications
• Double-wall or reinforced constructions
• Role in the Production Cycle

The folder-gluer stage directly affects:

• Production speed
• Structural integrity of the carton
• Dimensional accuracy
• Compatibility with automated filling lines
• Final perceived packaging quality

Improper machine setup may lead to misalignment, weak bonding, or performance issues during downstream packaging processes.

Machinery Used

High-speed folder-gluer machines, configurable with additional modules for special applications such as window patching, reinforcement insertion, or complex multi-point gluing.

This page is part of Gerp's glossary of terms. Gerp is a dedicated MIS to packaging industry. You are welcome to browse this website or contact us for more information.