Single Wall Corrugated Board

“C” flute is most often used where top to bottom box compression strength and contents cushioning is required;

and where the primary pack/contents provide minimal or no contribution to the stacking strength of the outer

C flute approximate thickness = 3.8mm

“B” flute is most often used where containment and space utilisation are of more importance than stacking strength;

and where the primary pack/contents provide all, or most of the stacking strength

B flute approximate thickness = 2.6mm

“R” flute or “I” flute (these are virtually identical) have recently been introduced and are most often used for shelf-ready packaging, where containment and space utilisation, particularly on supermarket shelves, are of more importance than stacking strength;

and where the primary pack/contents provide all, or most of the stacking strength

R / I flute approximate thickness = 2.2mm

“E” flute is most often used for inner packaging, where top to bottom compression strength and contents cushioning is of low priority;

and where space utilisation is of importance

E flute approximate thickness = 1.2mm

“N” flute is most often used for inner packaging, where top to bottom compression strength and contents cushioning is of low priority;

where high quality graphics are employed to enhance point of sale and where space utilisation is of importance

N flute approximate thickness = 0.9mm

This diagram shows the typical configuration of Single Wall corrugated board.

Three reels of paper have been used – two Liners and one Corrugating medium.

Twin Cushion (Double Wall) Corrugated Board

Combinations of flutes into Twin Cushion (“B/C”, “A/C” and “A/A”) are most often used when heavy duty packaging is required;

B/C T/C approximate thickness = 6.2mm

A/C T/C approximate thickness = 8.5mm

A/A T/C approximate thickness = 11.0mm

“B/E” Twin Cushion and “C/E” Twin Cushion are used in some fresh produce packaging and other special applications where high performance is required and pack design is enhanced by the thinner board grade

B/E T/C approximate thickness = 3.6mm

C/E T/C approximate thickness = 4.8mm

This diagram shows the typical configuration of Twin Cushion (Double Wall) corrugated board.

Five reels of paper have been used – three Liners and two Corrugating Mediums.

Triple Wall Corrugated Board

Triwall (“A/A/C”) is most often used when very heavy duty packaging is required;

A/A/C Triwall approximate thickness = 13.5mm

This diagram shows the typical configuration of Triple Wall (Triwall) corrugated board.

Seven reels of paper have been used – four Liners and three Corrugating Mediums.