The corrugated waves of corrugated cardboard are like arched doors connected one by one, arranged in a row and supporting each other to form a triangular structure. They have good mechanical strength and can withstand certain pressure from a flat surface. They are also elastic and have good buffering effect; It can be made into pads or containers of various shapes and sizes according to needs, which is simpler and faster than plastic cushioning materials; It is less affected by temperature, has good light blocking properties, does not deteriorate under light exposure, and is generally less affected by humidity. However, it is not suitable for long-term use in environments with high humidity, as this will affect its strength.

According to different combinations, corrugated cardboard can be divided into the following five types:

A cardboard made of a layer of core paper and cowhide card is called "corrugated cardboard". Corrugated cardboard is generally only used as a cushion, spacing, and wrapping for irregularly shaped objects.

A cardboard consisting of one layer of core paper and two layers of cowhide cards is called "single pit cardboard".

3. A double-layer core paper sandwiched between three layers of cowhide cards is called "double pit cardboard". Double pit cardboard can be composed of pit paper with different pit widths and paper types, such as using "B" pit paper with "C" pit paper.

The three-layer core paper sandwiched between four layers of cowhide cards is called "three pit cardboard".

5. Ultra strong dual body cardboard is developed from single pit cardboard, with the middle layer of core paper consisting of two thick core papers stacked and bonded together.

It is gratifying that today we can produce many different combinations of corrugated cardboard, which have different characteristics and strengths to meet the ever-changing needs of the market.