It can make the cutting disc have good shape retention, and generally use thermosetting phenolic resin as a binder. The diamond grits are mixed with resin and then sintered by hot pressing. After thermal curing, grinding is carried out. This process takes several hours, so the production cost is relatively high.
With the advancement of production technology, thermal curing resins are gradually replaced by light curing resins. Photocrosslinkable polymer, initiator and additive composition. The most essential difference between it and thermosetting resin is that its curing process is a chemical reaction caused by absorbing light radiation of the corresponding wavelength. Converts photocurable resins from liquid to solid. Its transition from liquid to solid is the result of an increase in molecular weight, not solvent volatilization. Therefore, it has the advantages of fast curing, no pollution and energy saving. But the limiting factor is the high price of its raw materials.
The use of light-curing resin method to manufacture ultra-thin cutting discs. my country has successfully developed an ultra-thin diamond cutting disc with a thickness of 0.15mm using light-cured resin as a binder. And successfully completed the cutting test of single crystal silicon wafer.
