Compositions, methods, and apparatus for manufacturing sheets having a highly inorganically filled matrix. Suitable inorganically filled mixtures are prepared by mixing together an organic polymer binder, water, one or more aggregate materials, fibers, and optional admixtures in the correct proportions...http://www.google.com.au/patents/US5928741?utm_source=gb-gplus-sharePatent US5928741 - Laminated articles of manufacture fashioned from sheets having a highly inorganically filled organic polymer matrix
