Fiber cement & silicate board Imerys minerals for controlling dimensional stability, thermal shrinkage and fiber board integrity
Imerys wollastonites and micas are ideal solutions for controlling dimensional stability, hydric movement, thermal shrinkage and board integrity in fiber cement and silicate board applications.
Certain 'formed building products' such as fiber cement boards are produced using the Hatschek process. When produced for wet rooms or for fire-resistant applications, these boards have to meet strict dimensional stability performance criteria. Using specific minerals and specific mineral combinations, manufacturers can achieve these dimensional stability performance requirements.
Nyad® G and Nyad MG high aspect ratio wollastonites provide high temperature resistance as well as dimensional stability in wet-room and fire-resistant fiber cement board formulations.
Suzorite® 20 S and Suzorite® 30 S low bulk density phlogopite mica improve thermal shrinkage and control hydric movement in fiber cement boards for wet room applications.
Often both minerals are formulated together to create a synergetic effect in fiber cement board.
Loading levels will depend on board specifications, but generally both minerals are formulated in the formulation at 4-7m% for wollastonite and 8-10m% for coarse mica.
We offer a full range of bespoke formulation and technical and process support services to help you match the right mineral grade to your application requirement.