In many applications when oxygen is present and the temperature is over 850 F the ideal sealing material "Grafoil" or flexible graphite cannot be used. Flexible graphite or "Grafoil" will coke at those elevated temperatures when oxygen is present.An excellent alternative in many applications is mica. Some of the basics on mica are shown below. As a gasket material mica can be very effective in sealing those high temp critical applications with out failing due to the presence of oxygen.Mica gaskets are laminates made from Mica impregnated with resin, stacked and pressed at high temperature and pressure to achieve polymerisation.
Consists of muscovite or phlogopite,mica sheet(paper) impregnated with specially selected epoxy resin.It can be sawed, sheared and punched into intricate shapes.Because of its superior uniformity, automatic feeding and stacking are possible and high speed assembly operations.
Application of Mica Gasket:
Supports for heating resistors (i.e. convectors).
Thermal insulation in circuit breakers and between electronic components
In large thickness, as thermal insulators for industries with large stress such as
iron and steel works, chemical, glass and petro-chemical industries
Mechanical support and electrical insulator in high voltage cabins
Replacements for asbestos panels in forging machines and hydraulic presses
Specification:
Sheets: 1000 x 600mm and 1000 x 1200mm
Mica Gasket:Strips and cutting in shapes according to drawing
Thickness:0.3-2.0mm