Foaming mechanism and countermeasures of hot press:

It may be that the material is not completely cured, the local temperature is too high, or the volatile content in the material is large, and the air traps between the sheets, which makes the semicircular bulge on the surface of the product.

(①When increasing the molding pressure

(②Extend the heat preservation time

(③) Lower the mold temperature.

④Reduce the unwinding area

(5) The surface color of the product is uneven