Flute is used to strengthen or reinforce cardboard used in your packaging, provide a central layer in corrugated board, separate the liners, provide insulation against sudden temperature changes, gives board rigidity and crushing strength.
Flute is categorized by thickness of paper being folded (fluting paper) - larger flutes (A&B) provide greater strength and cushioning while smaller flutes provide better printability and foldability
Types of flute:
- A-flute = original fluting for corrugated boxes, thickest with highest arch size, good for fragile/delicate items, 36 flutes per foot.
- B-flute = used for food/retail/customized print packaging, second highest arch size, good stacking strength and crushing resistance, good for canned goods and POP displays, 49 flutes per foot.
- C-flute = most commonly used corrugated box flute, good cushioning/stacking/printing properties, used for shipping/corrugated box display packaging, good for glass/furniture/dairy, 41 flutes per foot.
- E-flute = second most commonly used corrugated box, eco-friendly, used to print high quality print graphics, used for die-cut boxes and retail/printed corrugated box packaging, good for cosmetic/ceramic/pizza boxes, 90 flutes per foot.
- F-flute = small/tighter, eco-friendly/lower fibre content packaging, looks of high value, provides solid structure, used for custom printed boxes and retail packaging, good for cosmetic/jewelry/shoe boxes, 128 flutes per foot.
Note: PackMojo uses E-flute by default for corrugated mailer boxes, and B-flute for larger corrugated mailer boxes. If you'd like a different flute, please contact us.