Page 1 TBS Thermal Bonding System TBS is a two-part, thermally conductive epoxy system, designed for bonding applications at thermal interfaces. It is ideal for use as a bonding medium in surface mounting assemblies and where the design of heat sinks does not allow for welding or brazing techniques to be employed due to complexity or geometry of the fins. High bond strength and excellent adhesion provides an alternative to welding techniques Very good thermal conductivity optimum efficiency of heat dissipation Contains solid glass spheres (200-300 m diameter) aids application by controlling the correct coating thickness Room temperature curing simple mixing and curing procedures for ease of use Approvals RoHS Compliant (2015/863/EU): Yes Typical Properties Colour (Part A): Blue Colour (Part B): Cream Viscosity 1rpm (Pa s) : 70-80 Mix Ratio (A:B): 3:1 Usable Life: 3 to 4 hours Cure Time: 45 mins 100C 75 mins 60C 8 to 12 hrs room temperature - hard 48 hours room temperature - full cure Cured Properties Cured Density (g/ml): 1.85 Thermal Conductivity: 1.1 W/m.K Operating Temperature Range: -40C to + 120C Deflection Temperature: 100C Electric Strength: 11 to 12 kV/mm 14 15 Volume Resistivity: 10 to 10 Ohms/cm 2 Tensile Strength: 2200N/cm 2 Modulus of Elasticity: 2 to 3 GN/m 2 0.29 - 0.435 x 106 lbf/in Specific Heat Capacity: 0.5 cal/g/C 30C Part A 0.35 cal/g/C 30C Part B Description Packaging Order Code Shelf Life Thermal Bonding System 20 ml Twin Syringe System TBS20S 36 months 1kg Kit TBS01K 24 months Page 2 Directions for Use TBS is especially useful in the manufacture of heat sink assemblies where piggy back arrangements are applied and where the manufactured design of heat sinks does not allow for welding or brazing techniques to be employed due to complexity or geometry of the fins. Bare metal parts and heat sinks can be coated with TBS to avoid the risk of short circuiting if they contact other parts due to vibration damage. Chassis assemblies can be used as heat sinks by coating them with TBS and mounting components on them - the chassis can still be earthed. Surfaces must be clean and dry and free from grease, dust and contaminants. Electrolube manufacture a range of solvent and water based cleaning solutions for the preparation of surfaces prior to application. Mix the two parts of the compound together (as per the mix ratio given above). Apply to one of the prepared surfaces using a clean instrument, ensuring a thin even coating is achieved. Press the two surfaces together firmly (1-2 bars is adequate and a pressure of over 6 bar should not be applied). The mixture will remain flexible to allow for positioning adjustments to be made at this stage if necessary. For full cure, please follow the instructions above. Additional Information There are many methods of measuring thermal conductivity, resulting in large variances in results. Electrolube utilise a heat flow method which takes into account the surface resistance of the test substrate, thus offering highly accurate results of true thermal conductivity. Some alternative methods do not account for such surface resistance and can create the illusion of higher thermal conductivity. Therefore, when comparing thermal conductivity measurements it is important to know what test method has been utilised. For more information please contact the Electrolube Technical Department. The rate at which heat flows is dependent on the temperature differential, the thickness and uniformity of the layer, and the thermal conductivity of the material. Products with the same comparable thermal conductivity value may have very different efficiencies of heat transfer in the end application depending on how successfully a thin even film can be applied. A full range of heat transfer products are available from Electrolube: standard and highly thermal conductive pastes (HTC, HTSP, etc.), gap filling materials (HTCPX), Silicone RTVs (TCOR, TCER) and encapsulation resins (ER2220, UR5633, SC2003). Revision 5: Dec 2016