FREMGANGSMAATE FOR FREMSTILLING AV ET FIBERFORSTERKET PLATEPRODUKT.

摘要

1521482 Board TAC CONSTRUCTION MATERIALS Ltd 26 May 1976 [30 May 1975] 23536/75 Heading D2B A process for making a fibrous board or sheet comprises forming said board or sheet on a rotary sieve from an aqueous slurry containing ¢ to 20% by wt. vitreous fibres, (based on the finished product), an inorganic binder, and a minor proportion of non- asbestos fibres having a Canadian Standard Freeness of 20-300‹. The latter fibres may be a cellulosic pulp. The vitreous fibres may be glass and/or mineral wool fibres. The inorganic binder may be ordinary Portland cement and may include pulverised fuel ash. Perlite, china clay and/or diatomite may be added to the slurry to regulate the density of the final product, and free silica containing materials may also be added to react with any lime released with the binder sets.