Patent ID: 6153040
Filing Date: 2000-11-28
Classification: B32B,E04C,Y10T

Abstract:
A process for reducing rollups of a paper layer of a gypsum board panel during lamination of a film to a paper layer on an opposite side of the gypsum board panel, comprising:providing a laminator;providing at least one sheet of gypsum board, each said sheet having a face paper layer and a backing paper layer, each said paper layer having an exterior surface having a coefficient of friction;at least one of said face paper layer and said backing paper layer being treated on said exterior surface with an agent for reducing said coefficient of friction at a rate in the range of 0.01 lb/MSF-1.0 lb/MSF such that the gypsum board has a slide angle between 11.75 and 17.9 degrees;providing a supply of the film and installing the film in said laminator; andfeeding said at least one sheet of gypsum board through said laminator so that the film is laminated thereon;whereby said coefficient of friction is reduced to a level to prevent rollups caused by said feeding of said sheet of gypsum board through said laminator while being maintained at a sufficiently high level to ensure efficient handling of said at least one sheet of gypsum board.