Ultimately, we use two different test methods to measure the load securing properties of our anti-slip paper: For quick and easy determination, we measure the coefficient of sliding friction using a standardized coefficient of sliding friction block, a spring force gauge and the worst possible material pairing to build in safety, as this test method is not 100% accurate. This allows us to quickly confirm compliance with VDI standard 2700, even on site at the customer's premises if in doubt.

However, for more detailed evaluations, for example if the anti-slip paper quality required for a specific application is to be determined precisely, we rely on a more extensive procedure, whereby we determine the more meaningful slip angle for us in our laboratory using the "inclined plane" method.

What are the differences in determining the sliding friction coefficient and slip angle?

According to VDI standard 2700, a coefficient of sliding friction of 0.6 μ is required, which we must of course always comply with. We test this value with a coefficient of sliding friction determination block (REK) from the "Königsberger Ladungssicherungskreis" (KLSK), which allows us to check compliance with VDI standard 2700 sheet 14 relatively quickly and easily. We like to use this method for tests, as various surfaces (we usually test a smooth cardboard surface on anti-slip paper, which is one of the worst material pairings) can be simulated and thus a relatively practical result is achieved. In this context, we would like to point out that there are serious differences in the various material pairings with regard to the coefficients of sliding friction and if the block is only a little heavier, this also has a greater influence on the result. For these reasons, we honestly find this test somewhat inaccurate and, in case of doubt, also misinterpretable. This is why we usually carry out even more complex slip angle tests in our laboratory, which are based on a completely different test procedure. When we test the coefficient of sliding friction, we use a small DIN A4 sample and look at the force at which a displacement of the block is provoked. In the slip angle test, the exact material pairing is first simulated on a smooth, flat surface at the customer's premises and then this surface is tilted using a machine until the goods are displaced. This then corresponds to the slip angle and, in our opinion, is much more likely to simulate the practical challenges faced by the customer, as it is often also a question of determining the optimum anti-slip paper quality for the application. The quality should be both economical and, above all, suitable for the intended use as a load securing device.

What different test methods are there for determining the load securing values of anti-slip paper?

The different test methods play a decisive role in determining the load securing values of anti-slip paper, as they ensure in different ways that it meets the requirements for load securing. Two main methods are used to measure the load securing properties:

Using these two test methods, you can easily determine how effective and safe our anti-slip paper is and how well it secures the load.

How can different material pairings influence the sliding friction coefficient test and why is this test considered inaccurate?

Different material pairings can have a significant influence on the sliding friction coefficient test, as there are serious differences in the sliding friction coefficients between the various pairings. Depending on the material combination, the coefficient of sliding friction can be higher or lower, which in turn influences the test results and their interpretation. A specific challenge arises, for example, when pairing a smooth cardboard surface with anti-slip paper, which is considered one of the worst material pairings for this test. This variability in the material combinations leads to a relative inaccuracy of the sliding friction coefficient test.

The test is also considered inaccurate because even slight changes in the weight of the test block can have a major impact on the result. This shows the sensitivity of the test to external conditions, which limits its accuracy and therefore its reliability as an indicator of real conditions. Therefore, although the sliding friction coefficient test is used for quick and simple checks, more sophisticated slip angle tests are preferred for more precise and reliable results, especially with regard to the suitability for certain conditions of use of the anti-slip paper.

Why is it important to achieve practical results when determining the load securing values of anti-slip paper?

It is important to achieve practical results when determining the load securing values of anti-slip paper, as the real conditions under which the anti-slip paper is used should be simulated. When measuring the coefficient of sliding friction, for example, different surfaces are tested in order to simulate a situation that is as close to reality as possible. This is relevant as a wide variety of material pairings occur in real-life application scenarios and the effectiveness of the anti-slip paper must be guaranteed in every situation. Here, the practical determination helps to ensure that the anti-slip paper effectively supports load securing even under the worst possible conditions (which are simulated by the worst possible material pairing in the test). In addition, the simulation of real conditions, as carried out in the slip angle test by simulating the material pairing at the customer's premises and the subsequent inclination of the surface, allows the optimum anti-slip paper quality to be determined for the respective application. This is crucial in order to be able to offer the most suitable product both economically and in terms of its intended use as a load securing device. The aim is to find a product that not only meets the standards, but is also reliable in practice under various conditions.