Data Sheet

Koppe-Platz 1
92676 Eschenbach - Germany
Tel.:
Fax:
[e-mail]
www.kerafol.com
+49 (0) 96 45 - 88 300
+49 (0) 96 45 - 88 390
Important notes on page 2 / back
U 90
Keratherm silicone free U-Film
In case of concerns about using silicones,
we offer you a ceramic-lled polyurethane
lm as an alternative material. Besides
good thermal and outstanding electrical
properties, these lms are characterized by
very good perforation strength.
These good physical properties are mat-
ched with an excellent price-performance
ratio.
Applications
■ medical applications
■ laser equipment
■ lighting systems
■ CD-rom drives
■ aero units
■ space units
Optionally available with
adhesive coating!
Properties
Colour
Thermal Properties
Thermal resistance R
th
Thermal impedance R
ti
Thermal conductivity λ
Electrical Properties
Breakdown voltage U
d; ac
Dielectric breakdown E
d; ac
Volume resistivity
Dielectric loss factor tan δ
Dielectric constant ε
r
Mechanical Properties
Measured thickness (+/-10%)
Hardness
Tensile strength
Elongation
Physical Properties
Application temperature
Density
Flame rating
Possible thickness
Unit U 90
light blue
K/W 0.082
°Cmm²/W 32.9
Kin²/W 0.05
W/mK 6
kV 4
kV/mm 25
Ωm 2.0 x 10
11
1 13.7 x 10
-3
1 3.1
mm 0.200
Shore A 70 - 80
N/mm² 2.0
% 150
°C -40 to +125
g/cm³ 1.46
UL-94 V-0
mm 0.100 - 0.300
Compression U 90
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 10 20 30 40 50 60 70
Rth/R
pressure [N/cm²]
Compression U80 and U90
U90 Rth[K/W]
U90 R[Kin²/W]