Corrugated board is the backbone of modern packaging. Understanding its construction helps you make better decisions about which type suits your product and budget. Here's a breakdown of the key variables.
Board Construction
All corrugated board consists of fluted (wave-shaped) paper sandwiched between flat linerboards. The configuration determines strength, weight, and cost:
- Single Face: One liner + one fluted medium. Used for wrapping and cushioning, not structural.
- Single Wall (3-ply): Two liners + one fluted medium. The standard for most shipping boxes.
- Double Wall (5-ply): Three liners + two fluted mediums. For heavy products or stacking strength.
- Triple Wall (7-ply): Four liners + three fluted mediums. Industrial-grade, can replace wooden crates.
Flute Profiles
The flute size affects cushioning, stacking strength, and printability:
- A-Flute (4.8mm): Maximum cushioning. Best for fragile goods.
- B-Flute (3.0mm): Strong flat crush resistance. Ideal for canned goods and die-cut displays.
- C-Flute (3.6mm): The all-rounder. Most common for shipping boxes worldwide.
- E-Flute (1.5mm): Smooth surface, excellent for high-quality printing. Used for retail-ready packaging.
- F-Flute (0.8mm): Ultra-thin. Used for premium packaging where a smooth finish is critical.
Choosing the Right Combination
The best board type depends on your product weight, fragility, print requirements, and shipping method. Our packaging engineers can recommend the optimal combination for your specific application, balancing protection, presentation, and cost.