Potting Solution for Electric Tool Controller | PUR 1627 Thermal Conductive Flame Retardant Potting compound IP68 Protection
——Thermal conductivity, flame retardancy, IP68 comprehensive protectionIn electric tools such as drills, hammers, angle grinders, impact wrenches, etc., the controller is equivalent to the “brain” of the entire machine. It works in a complex environment with high current, high temperature rise, strong vibration, dust, and water vapor coexistence for a long time. Once the sealing material is selected improperly, it is prone to:Excessive temperature rise, power device failureMoisture intrusion can cause short circuits and corrosionLong term vibration leads to cracking of solder joints and detachment of componentsInsufficient flame retardant rating poses safety hazardsTherefore, controller encapsulation is not just about “filling it up”, but requires systematic requirements for material performance and reliability.1、 The core challenge of sealing electric tool controllersone ️⃣ Both heat dissipation and insulation must be taken into accountThe power MOS, IGBT, and drive module continue to generate heat, requiring effective thermal conductivity of the potting material while maintaining excellent electrical insulation to avoid leakage risks.2. ️⃣ The flame retardant level is directly related to safetyElectric tools belong to high-power equipment, and the sealing material must meet the UL 94 V-0 flame retardant rating, which does not support combustion or drip under abnormal working conditions.3 ️⃣ High waterproof and moisture-proof requirementsIn outdoor or construction site usage scenarios, rainwater, condensate, and dust are everywhere. The controller needs to achieve IP68 protection, and the sealing material must have low water absorption and long-term stability.4 ️⃣ Complex structure with high requirements for process friendlinessThe internal components of the controller are dense and have many gaps. The sealing adhesive needs to have low viscosity, good fluidity, and a wide operating window to ensure complete coverage and no gaps.2、 Recommended solutions PUR 1627 thermal conductive flame-retardant polyurethane sealant PUR 1627 provides a highly balanced solution between performance and process to address the aforementioned challenges…
