B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 1/26 (2006.01) C04B 35/636 (2006.01) C04B 35/80 (2006.01) C04B 35/81 (2006.01) C08L 3/04 (2006.01) D21H 13/36 (2006.01) D21H 13/38 (2006.01) D21H 13/46 (2006.01)
Patent
CA 2302207
A method of vacuum forming of aqueous, fibrous slurries and products produced thereby are disclosed. The method entails forming an aqueous slurry of ceramic fiber, cationic starch and silica sol. The silica has, based on total weight of the sol, about 50 % silica having a particle size range of from about 7 nm to about 200 nm and a specific surface area of about 100 m2/gm to about 10 m2/gm. The slurry is passed through a porous screen under a vacuum pressure depositing the solids content onto the screen to produce high strength products.
L'invention concerne un procédé de formation sous vide de suspensions aqueuses et fibreuses ainsi que les produits ainsi obtenus. Le procédé consiste à former une suspension aqueuse de fibres de céramique, d'amidon cationique et de sol de silice. La silice comprend, sur la base du poids total du sol, environ 50 % de silice présentant une gamme de grosseurs particulaires comprise entre environ 7nm et 200 nm ainsi qu'une aire de surface spécifique comprise entre environ 100m<2>/gm et environ 10m<2>/gm. On fait passer la suspension à travers un tamis poreux sous une dépression afin que le contenu en solides se dépose sur le tamis pour produire des produits de haute résistance.
Smith Paul Raymond
Wesbond Corporation
LandOfFree
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