Boards and panels

Details Boards and panels Boards and panels

1984-08-27

1987-01-20

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162145, 162146, 162177, 1621811, 1621816, 1621818, 264 82, 264316, 264333, D21F 1300

Patent

active

046378600

ABSTRACT:
A process for the manufacture of a non-asbestos corrugated sheet comprising forming into corrugated form an aqueous slurry of a mixture comprising, on a dry weight basis, 40-60% cement, 30-40% silica and 5-15% cellulose fibres, compressing said corrugated form so produced in a press to reduce its thickness and increase its density, removing said form from said press and submitting said form to autoclaving to cause reaction to occur between said cement and said silica to form a binder matrix. The aqueous slurry may include a moldability aid such as finely divided silica, and the corrugated forms are suitably compressed individually and then passed through a steam tunnel partially to harden them before autoclaving. In corrugated sheets formed are suitable for external cladding and roofing.

REFERENCES:
patent: 1433864 (1922-10-01), Williams
patent: 1944895 (1934-01-01), Ledeboer
patent: 2011440 (1935-08-01), Dorn et al.
patent: 3645961 (1972-02-01), Goldfein
patent: 3969567 (1976-07-01), Occleshaw et al.
patent: 4132555 (1979-01-01), Barrable
patent: 4363666 (1982-12-01), Johnson et al.

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