Cardboard is the thickest paper-based material, which can be up to 4 mm thick. It can consist of one or many layers. We distinguish two types of cardboard: solid cardboard and corrugated cardboard.
Solid cardboard resembles thick paper in appearance. It is produced by gluing several layers of so-called paper pulp, making it a single coherent layer in the end. It features a very dense structure, making it puncture-resistant. Solid cardboard is commonly used for packaging medicine, perfumes, toothpaste, confectionery products, etc.
Corrugated cardboard consists of alternating flat layers called liners – and a wavy layer called fluting. Depending on the number of layers, we distinguish cardboard as:
2 - layer,
3 - layer,
4 - layer,
5 - layer,
6 - and even 7 - layer.
At Prost-Key Packaging, we have the capacity to produce cardboard with the following flutes:
B flute - thickness from 2.5 to 3 mm,
C flute - thickness from 3 to 3.7 mm,
E flute (microflute) - thickness from 1.1 to 1.7 mm,
F flute (microflute) - thickness from 0.6 to 1.1 mm.
Market-wide corrugated cardboard is used with flutes: C, D, K, A, G, O. The higher the flute, the greater the stiffness of the cardboard. Conversely, cardboard with a lower flute is characterized by resistance to crushing and puncturing, making it an excellent material for packaging that requires printing. This type of cardboard can also be used as a package filler, with its significant advantage over bubble wrap being its biodegradability.
Solid cardboard also comes in versions up to 11 mm thick, thus taking first place among paper materials in terms of thickness. At Prost-Key, we use recycled cardboard, so the material is environmentally friendly. It is most commonly used in the production of boxes.
Types of cardboard
