Inorganic composition for high temperature use and method of forming a millboard therefrom
AssigneeJohns Manville
InventorsFred L. Jackson, John Wilmer Axelson
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Abstract
An inorganic composition useful as material for Lehr rolls at temperatures above 500.degree.C consists essentially of 15-45% chrysotile asbestos, 40-75% talc component and 2-35% inorganic binder. The composition is also used in manufacturing millboard by forming a water slurry of said composition and transferring said slurry to a rotating screen cylinder, then to a moving belt and then to a rotating drum upon which layers of said slurry accumulate upon each other and are thereafter slit, dried and formed into a flat sheet.
Claims26
A composition useful at temperatures in excess of 500.degree.C which consists essentially of, in percentage by weight of the composition:
- 15-45% chrysotile asbestos fiber, 40-75% talc component, and 2-35% inorganic binder.
Dependencies are inferred from the claim text.