Why is the membrane filter plate of the membrane filter press easily damaged?

The membrane Filter Plate of the diaphragm Filter Press is mainly composed of a base plate, a rubber diaphragm, a circular pressure plate, a metal layer, a sealing strip, a roller, a filtrate nozzle, an extrusion air nozzle, etc.
The diaphragm filter plate is placed between two perforated filter plates. Its function is to form a filter chamber together with the perforated filter plates. The diaphragm filter plate obtains high-pressure air bulges from the blower pipe to change the cavity volume and reduce the moisture content of the filter cake. .
The closed chamber of the diaphragm filter plate is composed of a rubber diaphragm and a filter plate base plate. In order to squeeze the slurry evenly and flatly, pressure plates are installed on the front and back sides of the rubber diaphragm to adjust the deformation. When the filter press is working, air is inflated into the closed chamber of the diaphragm filter plate to bulge the rubber diaphragm and change the cavity volume. Pressed copper concentrate slurry achieves the purpose of dehydration. When the airtight chamber of the diaphragm filter plate is inflated, the rubber diaphragm around the pressure plate bulges. The diaphragm in contact with the edge of the pressure plate is subject to shearing and tensile forces. After about 6 months of use, the diaphragm is prone to fatigue damage.