Continuous process for making pressed panels

摘要

Prodn. of flat pressing plates in a continuous process comprises: (a) mixing cellulosic particles with additives; (b) adding a 1st amt. of water and mixing until the cellulosic particles are fully moistened; (c) mixing with a 1st binder contg. a component contg. Al2O3; (d) adding a 2nd amt. of water and mixing; (e) adding a 2nd binder contg. gypsum and mixing; (f) adding a 3rd amt. of water and mixing; (g) adding a 3rd binder contg. Portland cement; (h) charging the mixt. as a fleece; and (i) pressing the fleece at a predetermined temp. by maintaining the pressing time and pressure. The 2nd and/or 3rd amts. of water contain an accelerator/delayer for the binders.