Based on its high mechanical strength and stability, as well as its light weight and excellent elasticity, vulcanized fibers are not only used in stamping parts, seals, laminates and other industrial products, but also used as carrier materials for grinding wheels, which are called vulcanized fibre grinding wheels or abbreviated steel-paper grinding discs. For this purpose, backbones with thickness ranging from 0.38 mm to 0.84 mm are usually used.
The cellulose in the back base of vulcanized fibers has hygroscopicity, that is to say, it absorbs or discharges moisture in the environment, which leads to the volume change of the fibers. For steel-paper abrasive discs exposed to excessive or low air humidity, this characteristic may cause the abrasive disc to bulge. Therefore, it is recommended to store the grinding disc in an environment with appropriate air humidity (relative humidity about 45-65%)