NON-ASBESTOS GASKET MATERIAL

摘要

Non-asbestos flexible sheet material suitable for use in gaskets (eg automobile exhaust manifold gaskets) operating at high temperature (eg 500 - 700 DEG C) is made by impregnating a non-woven tissue of glass or like fibre stable at 700 DEG C with an aqueous slurry of inorganic filler, particularly a clay, said aqueous slurry including a dispersed elastomeric binder (eg an acrylic) and a dispersed or dissolved binder (eg colloidal silica) which is essentially inorganic and is effective above 300 DEG C. The impregnated tissue is then dried. Mineral or carbon fibres may be used instead of glass.