CAPILLARY DEWATERING METHOD AND APPARATUS.

摘要

Disclosed is a method for reducing the moisture content of a paper web in a papermaking process from in the range of 10 percent to 32 percent dry to the range of 33 percent to 50 percent dry wherein the embryonic web (14) is supported on a knuckled through drier fabric and lightly pressed between the knuckled through drier fabric and a capillary membrane (12) of a capillary dewatering roll. The capillary membrane (12) has capillary pores therethrough which have a substantially straight through, non-tortuous path with a pore aspect ratio of from about 2 to about 20. A vacuum is drawn within the capillary dewatering roll which is not greater than the negative capillary suction pressure of the capillary pores.