The basic characteristics of corrugated board (2)

Third, punch not piercing strength (cardboard puncture strength tester) as shown below

This experiment was invented by Bichi. In the United States and Japan, the puncture strength is as important as the burst strength.

The puncture strength is measured by a penetrator, which is called a puncture strength tester. It determines the power consumed by a right-angled triangular cone penetrating a corrugated paperboard. The unit is “joule (J)”. When the pendulum drives a right-angled triangle to break the corrugated cardboard, the lost energy is equivalent to the three edges of the corrugated cardboard. Cardboard resistance. The difference between the angle at which the pendulum was initially raised and the angle at which the pendulum breaks through the cardboard is equal to the amount of solution lost by the pendulum. That is, the puncture resistance value can be calculated according to the angle of the pendulum.

Fourth, side pressure strength (computer monitoring compression instrument)

The side pressure strength test is a corrugated paperboard with a certain thickness (width 25mm) on a corrugated surface and can withstand the vertical uniform increase in force per unit length. It is called the side pressure strength of a corrugated paperboard and the unit of the side pressure strength, N /m.

Three blocks of 100mm ± 0.5mm × 25mm ± 0.5mm without printing, no mechanical indentation, and no damage were taken from each of the three sample boxes. The test method of edge pressure strength is to place the sample in the middle of the platen under the tester so that the corrugation of the sample is perpendicular to the two platens. The guide block is used to support the sample so that the surface of the sample is perpendicular to the platen and the tester is applied. pressure. The side pressure of the corrugated board directly affects the supporting strength of the corrugated box. The corrugated board production process, corrugated board structure, adhesive quality and other factors can affect the side pressure of corrugated board.

Fifth, flat compressive strength test (computer monitoring compression instrument)

The flat compressive strength can reflect the softness and hardness of the corrugated paperboard, so it is a very important feature. In accordance with the provisions of the method using a dedicated sampling instrument to cut 32cm2 sample area on the plane compressive strength test.

In general, the main reasons for the low compressive strength of corrugated paper are the following:

1, poor quality of tile.

2, corrugated board moisture content is high.

3, poor corrugated molding.

4, due to some reason caused the collapse of corrugated.