Product
DATA SHEET


HEAT_MIC.DOC(0200) ATTAMICA -H

Attamica-H is based on muscovite mica paper bonded with a heat resisting silicone resin. Several layers of the resin impregnated mica paper are pressed under heat and high pressure to form rigid sheets. The resulting fully cured laminate has good mechanical electrical and thermal properties. It is silver in colour, hard and rigid, may be punched, cut into various shapes & sizes and is available in a range of thicknesses.


APPLICATIONS

Applications include base and covering plates for electric toasters, hair-driers and many other domestic appliances as well as free standing heating elements, busbar supports and platen insulation and other thermal barriers. The material is used in many other applications where a thermally stable asbestos free product is required. The material generates very low smoke and odour at the initial heating only. If it is to be used in an enclosed environment, heat treatment prior to use is therefore recommended.


General properties  
Type of mica Muscovite mica paper based
Binder approx 10% silicone resin
Colour Silver
Density 2.1 - 2.2
Electrical properties  
Electric strength (min.) 25 kV/mm
Insulation resistance 10 16 Ohms/cm @ 20°C
Colour < 1% after 24 hours
Mechanical properties  
Flexural strength 200 MPa
Tensile strength 140 MPa
Compressive strength (22°C) 360 MPa
Compressive strength (200°C) 235 MPa
Thermal properties  
Weight loss at 550°C < 2%
Specific heat 866 J/kg/°C
Thermal conductivity 0.3 W/mK
Thermal expansion ^ 60 x 10-6cm/cm/K
Thermal expansion / / 10 x 10-6cm/cm/K
Temperature range 500°C continuous, 700°C intermittent
Specifications - IEC 371-3-3. VDE 0332 and DIN40612-H.E.M 3327
Sheet sizes 1000 x 1200 mm (other sheet sizes available on request)
Thickness range 0.1mm to 75mm

 
 
Attwater Group
PO Box 39, Hopwood Street, Preston
Lancashire PR1 1TA, England
Tel: +44 (0) 1772 258245
Fax: +44(0) 1772 203361
Email: info@attwater.co.uk
Web: http://www.attwater.co.uk