To produce our packaging we use corrugated cardboard which consists of external smooth sheets of cardboard and internal waved sheets of cardboard. There are many different types of corrugated cardboard with different technical specification and usage.
SINGLE FACE BOARD
This type of cardboard does not have the same durability as other types of corrugated cardboard. Single face corrugated predominantly consists of two layers of paper (an outer liner and fluting) and is supplied in rolls. It is mostly used as inner packaging to separate and protect individual products inside the outer packaging.
SINGLE WALL BOARD
Single wall corrugated board (also known as double face board) consists of one piece of fluted material glued between two pieces of liner. This is the most commonly used style of corrugated cardboard that has five different styles of flutes.
- A-Flute (approx. 5mm height): This is the original corrugated flute design and is the thickest. With it’s thickness, A-flute provides the greatest cushioning properties for fragile products.
- B-Flute (approx. 3mm height): This is a very robust flute, offering compactness for minimising storage space. It provides a good printing surface and is most often used for die-cut boxes, canned goods and displays.
- C-Flute (approx. 3.5mm height): The most widely used flute size, commonly used for shipping cartons. C-flute offers good crushing resistance, good stacking strength, and highly acceptable printing properties.
- E-Flute (approx. 1.2mm height) : It gives an excellent crush resistance and compression strength. It provides a high quality surface to print upon and is most commonly used in smaller cartons and die-cuts applications (cosmetics boxes, glass and ceramic boxes, pizza boxes).
- F-Flute / Micro-Flute (approx. 0.8mm height): The newest type of corrugated cardboard. F-flute is only half the thickness of E-flute and is currently expanding in use because it can reduce the total amount of paper fiber in packaging for a more sustainable solution.
Generally, larger flute profiles deliver greater vertical compression strength and cushioning. Smaller flute profiles provide enhanced structural and graphics capabilities for use in retail packaging.
DOUBLE WALL BOARD
Double wall corrugated board consists of two pieces of fluted material glued between three pieces of liner. This board is resistant to breaking when stacked and is commonly used for larger industrial containers.
Different flute profiles can be combined in one piece of combined board. For example, a double wall board may contain one layer of B-flute medium with one layer of C-flute medium. Mixing flute profiles allows designers to adjust compression strength, cushioning strength and total thickness of the combined board. Most popular double wall board types are:
- EB-Flute (approx. 4.2mm height) – this is a combination of B-Flute on the inside and E-flute on the outside. It gives an excellent performance level in both print finish and impact protection.
- BC-Flute (approx. 6.5mm height) – this is a combination of C-flute on the inside and B-flute on the outside. This type of flute is most commonly used in shipping cartons for higher levels of contents protection.
TRIPLE WALL BOARD
Triple wall corrugated board consists of three pieces of fluted material glued between four pieces of liner. This board is commonly used as a more lightweight substitute for wooden shipping crates for larger or heavier shipments.
At Duncan Packaging we can offer you a wide range of possibilities when trying to decide on a cardboard type. If you are still unsure as to what cardboard type you want be sure to call us or fill our quick contact form.