Flute refers to the shape and specification of the corrugated medium within corrugated board. It is a key factor that determines the board’s cushioning performance, strength, and thickness. Common flute types include A, B, C, E, F, and micro flutes (such as E, F, G flutes). Each flute type varies in height and flute count: A-flute is higher with better cushioning, B-flute is flatter with stronger compression resistance, C-flute offers balanced performance, and micro flutes like E and F are thinner and provide smoother surfaces ideal for high-quality printing and small packaging. The choice of flute type directly influences the packaging’s strength, protective function, and printability.
