Thermal Interface Materials

TEK-SIL Materials

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Thermal Conductivity Conversion Table
Thermal Conductivity	BTU-in/hrft²F	Cal/cm • ºC • sec	Watt/m-K
BTU-in/hrft²F	1	3.4x10⁴	0.14
Cal/cm • ºC • sec	2.9x10³	1	4.2x10²
Watt/m-K	6.9	2.4x10e³	1

Formulations/Configurations

A variety of specific compounds are available for a wide range of performance requirements in Sheets, Rolls, Die-cuts, Gel, Extrusions or Moldings

Tek-Sil® Type	Application Guidelines	Typical Thermal Conductivity
		Cal/cm·sec·°C	W/m-K
Tek-Sil®SCT	General purpose for moldings and extrusions	2.9x10³	1.2
Tek-Sil®SCH	High heat conductivity	4.1x10³	1.7
Tek-Sil®SR	General purpose extrusion with .05mm glass cloth reinforcement	2.2x10³	0.9
Tek-Sil®SH	High heat conductivity with .05mm glass cloth reinforcement	3.4x10³	1.4
Tek-Sil®SB	Highest heat conductivity with .05mm glass cloth reinforcement	7.0x10³	2.9
Tek-Sil®SU	Very high heat conductivity	6.2x10³	2.6
Tek-Sil®SQ	Low hardness with high heat conductivity	2.6x10³	1.1
Mica	Shown for comparison purposes only	1.4x10³	0.59
Polyester	Shown for comparison purposes only	.34x10³	0.14

Test Properties			Tek-Sil® SCT			Tek-Sil® SCH
	Color		Greenish Gray			Brown
	Hardness (ASTM D2240, type A)		75			85
Physical	Tensile Strength (Mpa)		5.4			4.9
	Elongation (%)		100			60
	Tear Strength (KN/m) (angle, non-slit)		9			7
	Change in Hardness (point)	3 days	10 days	20 days	3 days	10 days	20 days
		+/-0.0	+/-5	+9	+1	+1	+3
Heat Aging	Change in Tensile Strength (%)	+/-0.0	+/-0.0	+6	-12	-12	-12
(aging test by heating)	Change in Elongation (%)	-16	-26	-34	-18	-24	-35
in air, to 200°C	Volume Resistivity (Mohm-m)		1.0X10⁷			1.0X10⁷
	Dielectric Breakdown Strength (kV/mm)		20			19
Electrical	Dielectric Constant	50Hz	10³ HZ	10⁶ Hz	50Hz	10³ HZ	10⁶ Hz
		4.9	4.9	4.9	5.7	5.4	4.9
	Dielectric Dissipation Factor	0.002	0.001	0.002	0.004	0.002	0.002
Thermal	Thermal Conductivity (W/m-K)		1.2			1.7
	Flame Retardant (UL94)		V-0			V-0

Test Properties			Tek-Sil® SU			Tek-Sil® SQ
	Color		Gray			Black
	Hardness (ASTM D2240, type A)		79			55
Physical	Tensile Strength (Mpa)		2.5			2.3
	Elongation (%)		110			250
	Tear Strength (KN/m) (angle, non-slit)		8			13
	Change in Hardness (point)	3 days	10 days	20 days	3 days	10 days	20 days
		+8	+11	+15	+/-0.0	+1	+5
Heat Aging	Change in Tensile Strength (%)	+19	+42	+62	+/-0.0	+14	+24
(aging test by heating	Change in Elongation (%)	-46	-49	-49	-7	-15	-27
in air, to 200°C	Volume Resistivity (Mohm-m)		1.0X10⁷			1.0X10⁷
	Dielectric Breakdown Strength (kV/mm)		17			22
Electrical	Dielectric Constant	50Hz	10³ HZ	10⁶ Hz	50Hz	10³ HZ	10⁶ Hz
		5.34	5.32	5.33	4.67	4.61	4.62
	Dielectric Dissipation Factor	0.0026	0.0014	0.001	0.0031	0.0015	0.0008
Thermal	Thermal Conductivity (W/m-K)		2.6			1.1
	Flame Retardant (UL94)		V-0			V-0

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