Types of cardboard for carton production
When choosing packaging, apart from the shape and proper size, it is important to select an appropriate type of cardboard for the packaging.
There are a number of parameters to choose from, such as: rigidity, compressive strength, bending resistance, etc.
Carton manufacturers use two types of cardboard for making the right kind of packaging, namely:
It consists of several layers of paper (cardboard can have three or five layers) – with the outer layers smooth, and the inner corrugated. The flutes can be of varying thickness and depending on this factor, they are marked with the following symbols: B, C, E, BC, BE.
Below you can see an example of several types of corrugated cardboard:
Three-layer cardboard – consists of two flat layers and one corrugated layer.
- E – (micro-flute) flute thickness between 1.1 and 1.7 mm
- B – flute thickness between 2.5 and 3.0 mm
- C – flute thickness between 3.0 and 3.7 mm
Five-layer cardboard – consists of three flat layers and two corrugated layers.
- BC – flute thickness between 5.5 and 6.7 mm
- BE – flute thickness between 3.6 and 4.7 mm
This kind of cardboard is characterised by high rigidity, therefore it is used mainly for larger packages.
It consists of a single smooth sheet of paper with a specific basis weight and thickness. It is mused primarily for the production of smaller cartons which do not require high durability. It is used to make various kinds of spacers, corner pieces, etc.