Patent ID: 6530316
Filing Date: 2003-03-11
Classification: B27N,B29K,B30B,C10M,C10N

Abstract:
In a continuous operation press for the manufacture and treating of a board web comprising prefabricated material or raw material and cellulose-containing particles, the board web being passed into an inlet region of a lower endless steel belt and an upper endless steel belt, which travel at a predetermined velocity in a transport direction, wherein there is provided a smooth coating formed with grooves serving as a sliding surface located at least in the main press region and the calibration region disposed downstream therefrom, the smooth coating is supported on a lower countersupport and on an upper countersupport, the board web gliding above the smooth coating with the aid of fluid lubricant, the supply of said fluid lubricant being under pressure, the lubricant being supplied to the smooth coating through supply conduits and supply openings and discharged therefrom through discharge openings and discharge conduits, the lubricant being recirculated and optionally heated or cooled, the improvement comprising using as the lubricant at least one phenyl-endblocked polydiorganosiloxane-polyphenylorganosiloxane random copolymer fluid selected from the group consisting of phenyldimethylsiloxy-endblocked polydiorganosiloxane-polyphenylorganosiloxane random copolymer fluids, diphenylmethylsiloxy-endblocked polydiorganosiloxane-polyphenylorganosiloxane random copolymer fluids, and triphenylsiloxy-endblocked polydiorganosiloxane-polyphenylorganosiloxane random copolymer fluids.