D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
92/11, 9/51, 154
D21H 13/38 (2006.01) D21F 11/02 (2006.01) D21H 13/40 (2006.01) D21H 17/37 (2006.01) D21J 1/20 (2006.01)
Patent
CA 1330290
METHOD FOR MANUFACTURING A MINERAL PANEL Abstract of the Disclosure Method for the manufacture of structural mineral panels on a foraminous support wire by forming a dilute aqueous dispersion of mineral fiber and/or lightweight aggregate with some fiber and binder solids in water. A small amount of cationic flocculant such as polyacrylamide is added sufficient to effect coating of the binder solids onto the mineral fiber materials and the slurry is passed to a first flooded section of the support wire to form an open, entangled, structural mass having water in interstitial spaces of the entangled mass. Water is stripped from the mass and the mass dried substantially without collapse of the open structure, first by application of brief pulses of high vacuum followed by further vacuum and passing heated dry air through the open entangled structure. This produces a very uniform homogeneous panel core with very evenly spaced and uniformly sized voids in the open cored structure.
555869
Englert Mark Howard
Izard David Graham
Macrae & Co.
Usg Interiors Inc.
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