Film preparation and inspection of Physical and Mechanical Properties - "Membrane adhesion determination method"

The results measured by the method stipulated in my country's GB1720-79 are actually not the real adhesion force, but the comprehensive result of many forces, and the method stipulated in ISO2409-72 has no principle difference from GB1720-79, just circled The law is changed to the grid method. The pull-off test method stipulated in ISO4624 is a method for measuring the true adhesion, which is relatively strict. It is used to determine the minimum tensile strength between a sample with a fixed cross-sectional area and the substrate. The direction of this tension is perpendicular to the substrate, and its magnitude is the magnitude of the force used to pull off the coating film per unit area from the substrate (instead of disconnecting from the middle of the Xu film). In this method, the first is to use a Tensile Testing Machine, and the second is to choose an appropriate adhesive to bond the coating film and the upper measuring head.