Heat Resistant Mica Sheet

This series mica sheets are high-temp insulating materials, made from muscovite or phlogopite mica paper and organic silicone resin after melting and laminating process. They are widely used in electrical appliances such as toaster, hair dryer and other electric heaters which require high temperature and electric insulation.

GT-M-R: Muscovite Rigid Sheet

GT-P-R: Phlogopite Rigid Sheet

GT-M-S: Muscovite Soft Sheet

GT-P-S: Phlogopite Soft Sheet

 

PropertiesⅠ(Rigid sheet):

Items		Test standard	GT-M-R	GT-P-R
Mica content %		IEC371	≥90	≥90
Resin content %		IEC371	≤10	≤10
Density g/m3		IEC371	1.7-2.25	1.7-2.25
Heat resistance	Continuous ℃		500	700
	Intermittent ℃		700	900
Heat loss	At 500℃ %	IEC371	≤1	≤1
	At 700℃ %	IEC371	≤2	≤2
Flexural strength N/mm2		GB/T5019	≥160	≥140
Water absorption 24h/23℃ %		GB/T5019	≤1	≤1.5
Dielectric strength Kv/mm		IEC243	≥20	≥20
Volume resistivity	23℃ ohm·cm	IEC93	≥1017	≥1017
	500℃ ohm·cm	IEC93	≥1012	≥1012

 

Properties Ⅱ(Soft sheet)

Items		Test standard	GT-M-S	GT-P-S
Mica content, %		IEC371	≥90	≥90
Resin content %		IEC371	≤10	≤10
Density, g/cm3		IEC371	1.7-2.15	1.7-2.15
Heat resistance	Continuous ℃	---	500	700
	Intermittent ℃	---	700	900
Heat loss	At 500 ℃ %	IEC371	<3	<3
Water absorption 24h/23 ℃ %		---	---	---
Dielectric strength Kv/mm		IEC243	≥20	≥18
Volume resistivity	23℃ ohm·cm	IEC93	≥1017	≥1017
	500℃ ohm·cm	IEC93	≥1012	≥1012