The bonding strength of paper and paperboard refers to the bonding strength between the face layer and the core layer of the paperboard. Cardboard is usually composed of multiple layers of paper, where the face layer is a thicker, smoother paper and the core is a thinner, less strong paper. These two layers of paper are bonded together by glue or other adhesives to form cardboard. Bond strength refers to the bond strength of the two plies of paper and is usually measured by applying a tensile force on a sample. If the bonding strength is low, the surface layer and core layer of the cardboard may be separated, resulting in a reduction in the strength of the cardboard, which affects its use during transportation and packaging. Therefore, bonding strength is an important indicator in the manufacture and use of paperboard.
The bond strength of paper and paperboard can be measured using a Scott Bond Strength Tester. The steps are as follows:
Place the sample to be tested on the test bench of the Scott Bond strength meter.
Place a circular test head on the surface of the sample and apply a certain force to bring the test head into contact with the sample surface.
At the beginning of the test, the test head is torn off the surface of the sample at a specific speed and force until the sample is separated.
Record the value displayed by the instrument, which is the binding strength of the sample.
Beichao reminds you: In order to ensure the accuracy of the measurement, the measurement should be repeated several times under the same experimental conditions and the average value should be taken. In addition, the sample preparation method and size will also affect the measurement results, so the appropriate sample preparation method and size should be selected before measurement.
