C - Chemistry – Metallurgy – 04 – B
Patent
C - Chemistry, Metallurgy
04
B
92/11, 25/111, 2
C04B 28/04 (2006.01)
Patent
CA 1153021
ABSTRACT A board or sheet product having a density of at least 1300 kg/m is formed from a non-asbestos composition comprising (i) an inorganic binder or the precursors thereof in an amount of at least 75% of the composition on a dry weight basis, and (ii) from 2 to 25%, on the same basis, of cotton having a freeness of 20-80° (Schopper Riegler). The cotton, which suitably comprises first cut linters, is preferably processed to a free- ness of 25-40° S.R. The impact resistance of the products may be improved by including in the initial mix synthetic organic fibres, e.g. polypropylene fibres.
354523
Harper Stephen
Johnson Andrew
Cape Boards & Panels Limited
Gowling Lafleur Henderson Llp
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