Flute refers to the wavy layer of paperboard material sandwiched between two flat linerboards in corrugated board. It is the primary component that gives corrugated board its strength and cushioning ability.

The most common flute profiles:

A-Flute is the most substantial and thickest flute profile among all corrugated flutes. It has a height of approximately 4.8mm and provides excellent cushioning and protection during shipping and handling. Ideal for heavy and fragile items such as appliances, electronics, and furniture.

B-Flute is the second most common flute profile after A-Flute. It has a height of around 3.2mm and offers good cushioning and stacking strength. Suitable for cosmetics, food, and pharmaceuticals.

C-Flute is the most widely used flute profile in the packaging industry. It has a height of approximately 4mm and provides a balance between cushioning and stacking strength. Ideal for appliances, automotive parts, and furniture.

E-Flute is the thinnest flute profile. It has a height of around 1.6mm and provides a smooth surface for printing high-quality graphics. Suitable for cosmetics, food, and electronics.

F-Flute is a specialty flute profile that has a height of approximately 0.8mm. It provides excellent printing surface and is ideal for luxury goods, displays, and point-of-purchase (POP) materials.

Understanding the different flute profiles is essential for selecting the right corrugated board for your packaging.

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