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REACH directive 33 compliant
Keratherm Double Sided
Thermal Adhesive Tape
KL 90 & KL 91
 Keratherm Green
Description

Keratherm KL90 & KL91 highly thermally conductive, double-sided adhesive tapes. These tapes provide 1.4 W/mK of thermal conductivity – nearly three times higher than other thermal tapes – for more effective heat transfer from hot components to heat sinks.

Keratherm KL 90 tape consists of a ceramic-filled acrylic adhesive film that provides exceptional bonding properties, and replaces the use of mechanical fasteners, reducing costs and assembly time. A fiberglass-reinforced version, KL91, is available for applications requiring higher levels of ruggedness, peel strength, and conformability to irregular surfaces. Both Keratherm KL90 and KL91 mounting tapes are silicone-free, eliminating any contamination concerns. If necessary, the tapes can be cleanly removed using a thin-edge blade.

Keratherm KL 90 double-sided adhesive tape is supplied on 400 mm (15.75 in) wide rolls, and is also available in custom die-cut shapes.
Keratherm Double Sided Adhesive Tape : KL 90 & KL 91
Property Unit KL 90 KL 91
Color   black black
Adhesive   acrylic acrylic
Reinforcement (fiberglass)   without with
Thermal Properties
Thermal Resistance * Rth K/W 0.52 0.52
Thermal Impedance * Rti ˚Cmm2/W
Kin2/W		 208
0.32		 220
0.34
Thermal Conductivity * W/mK 1.4 1.35
Electrical Properties
Dielectric Breakdown  Ed; ac kV/mm 10.0 10.0
Volume Resistivity Ωcm 2.6 x 104 2.6 x 104
Dielectric Loss Factor  tan δ 1 30.5 x 10-2 30.5 x 10-2
Dielectric Constant  εr 1 18.5 18.5
Mechanical Properties
Hardness Shore A 45 59
Tensile Strength (single adhesive film) MPa 0.25 0.25
Specific Film Characteristics Unit KL 90
(without fiberglass)		 KL 91
(with fiberglass)
Application (pressure/time) N/cm2/sec 10/10 10/15
Tensile Shear Strength
[25mmx25mm-adhesive area-180˚ 
aluminum – adhesive film – aluminum]		 N/cm2
[DIN EN 1645]		 >30 >25
Tensile Shear Strength 
temperature-depending **
[25mmx25mm-adhesive area-180˚ 
aluminum – adhesive film – aluminum]		 -20˚C
+20˚C
+60˚C
+70˚C
+80˚C		 N/cm2
[DIN EN 1645]		 157.2
51.7
14.1
12.0
10.7		 146.8
50.3
13.6
10.7
9.5
Adhesion* (bonding strength) Nmm >1.2 >1.0
Tack* (surface adhesiveness) mm >1.5 >1.2
Peel Strength (90˚ on aluminum) N/25mm 3 [adhesive] 9 [adhesive]
Application Temperature (continuous) ˚C -40 to +125 -40 to +125
Overall Thickness (±10%) mm .300 .300
Shelf Life months 12 12
  * - used measurement - Texture Analyser (TA.XT-plus)
** - according to test standard DIN EN 1645; test speed 0,5 inch/min;
       adhesion area of 25x25 mm² (1inch²);
       glued on an AlCuMg1-substrate, stored at room temperature for 62 hours.

 

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