Flexible sheet material
AssigneeAMFU Limited
InventorsBrian Hargreaves, Alan K. Cousens
Life of this patent
Estimating the term…
Abstract
Flexible sheet material suitable for use in the manufacture of gaskets has a basis (85-95% by weight) of fine particles of a non-fibrous charged-layer-silicate mineral such as chlorite and includes a minor proportion (at least 2% but not more than 15% by weight of the material) of organic web-forming fibers, preferably cellulose fibers. The fine particles of the silicate mineral and the web-forming fibers are bound together with a synthetic rubber.
Claims7
Non-asbestos flexible sheet material having a basis of a major portion of fine particles of a chlorite as a non-fibrous charged-layer-silicate mineral and including a minor proportion of organic web-forming fibers, said fine particles and said organic web-forming fibers being bound together with a synthetic rubber;
- said flexible sheet material being made by a process in which an aqueous slurry of the aforesaid ingredients is progressively dewatered as a layer on a water-permeable conveyor and the dewatered layer is subsequently compressed and dried, said flexible sheet material having said ingredients in the following proportions by dry weight:
- ______________________________________ silicate mineral 85-95% organic web-forming fibers 2-15% synthetic rubber 1-10% ______________________________________
Dependencies are inferred from the claim text.