通信電纜絕緣膏
Item Test Method Grade
Naptel 952 Insojell 924 Insojell 73
Physical Properties
Colour Visual White - -
Drop Point/°C ASTM D566 Mod.* 90 Minimum 90 Minimum 73 Minimum
Cone Penetration 
at 25°C/0.1 mm
ASTM D937 Mod.* 80 Minimum 40-100 60-90
Kinematic Viscosity at 120°C/cSt ASTM D445 125 - 165 125 - 400 13-25
Flash Point/°C ASTM D92 200 Minimum 200 Minimum 230 Minimum
Separation of Oil IEC 811-5-1 Pass Pass Pass
Low Temperature Brittleness IEC 811-5-1 Pass Pass Pass
Chemical Properties
Total Acid Number/mg KOH g-1 IEC 811-5-1 0.05 Maximum 0.05 Maximum 0.05 Maximum
Absence of Corrosive Components IEC 811-5-1 Pass Pass Pass
Electrical Properties
Volume Resistivity 
at 100°C/W.cm
IEC 247, ASTM D1169 150 x 1012 Minimum 1 x 1012 Minimum 1 x 1012 Minimum
Volume Resistivity 
at 23°C/W.cm
IEC 247, ASTM D257 - 1 x 1015 Minimum 1 x 1015 Minimum
Dielectric Dissipation Factor at 100°C IEC 247, ASTM D952 0.0005 Maximum - -
Dielectric Dissipation Factor at 23°C, 1 MHz ASTM D150 0.0015 Maximum - -
Relative Permittivity 
at 23°C
ASTM D150 2.3 Maximum 2.3 Maximum 2.3 Maximum

Further specifications on request