This film is used in Transformers for Insulation such as in Toroidal Transformers, Current / Potential
Transformers (CTPT) & Instrumentation Transformers.

Sr.Nos
Property
Unit
Test Method
Typical Value
- General
 ---- - - - - -
1
 Thickness
Polymers
50
125
187
250
2
 Density
M2/Kg
Polymers
14.3
5.71
3.76
2.86
3
 Yield
gm/cc
ASTM-D-1505
1.4
1.4
1.4
1.4
4
 Water Absorption (Max)
%
ASTM-D-570
0.8
0.6
0.6
0.6
5
 Service Temp
°C
Polymers
-
- 70 to 150
6
 OligomerExtraction
%
Polymers
-
1.5
1.5
1.5
-
 Mechanical
 - - - - - -
1
 Tensile Strength at break (MD/TD)
Kg/cm2
ASTM-D-882
1850
1800
1800
1800
2
 Elongation (MD/TD)
%
ASTM-D-882
130
150
150
150
3
 Slip (COF)
-
ASTM-D-1894
0.4
0.3
0.3
0.3
-
 Optical
 - - - - - -
1
 Haze
%
ASTM-D-1003
10
70
80
88
-
 Thermal - - - - - -
1
 Shrinkage @150°C 30 min
MD
TD

%
%
ASTM-D-1204

1.2
 0.4

1
0.4

1
0.4

1
0.4
2
 Shrinkage @150°C 5 min
MD
TD
%

ASTM-D-1204
-
1.8
1
1.8
1
1.8
1
3
 Melting Point
°C
DSC
255
255
255
255
4
 Specific Heat @ 25°C
cal /g /°C
-
-

0.32
0.32
0.32
5
 Coeff of Thermal Expansion
between 20°C& 50°C
1/K
(cm/cm°C)
-
-
 -
-
36 X 10 -6 (MD)
23 X 10 -6 (TD)
-
-
 Electrical
 - - - - - -
1
 Break Down Voltage(2"Brass electrode)
KV
ASTM-D-149
9.5
15.5
18
9.5
2
 Surface Resistivity
Ohm
ASTM-D-257
10 12
10 12
10 12
10 12
3
 Volume Resistivity @ R T.
Ohm cm
ASTM-D-257
10 16
10 16
10 16
10 16
4
 Dielectric Constant
-
ASTM-D-1505
-
-
-
-
5
 Permitivity
23°C, 50 Hz
23°C, 1 kHz
23°C, 10 kHz
0°C, 50 Hz
50°C, 50 Hz
-
IEC 250
-
-

3.26
3.24
3.21
3.26
3.27
-
6
 Dissipation Factor
23°C, 50 Hz
23°C, 1 kHz
23°C, 10 kHz
0°C, 50 Hz
50°C, 50 Hz
-

IEC 250

-
-

0.002
0.0055
0.011
0.004
0.0015
-

MD - Machine Direction
TD - Transverse Direction

Roll - ID / OD / Length / Width - Available as per customers specifications

The data given above has been obtained using standard test procedures on defined specimens. The
results should therefore only be regarded as a general guide to material properties and not as design data