Epoxy Resin Coating Powder with High Tracking Resistance for Electrical Insulation

Products

Epoxy Resin Coating Powder have for Bus-bar Insulation
SUMILITERESIN™ ECP is Coating Powder for Electrical Insulation Based on Epoxy Resin.
It has High Tracking Resistance, Strong Adhesion to Copper, and Excellent Coating Workability.

Plant

Shizuoka Plant

Laboratories

High Performance Plastic Technology Development Laboratory

Features

Advantages of Epoxy Resin（Our Estimation）

High Electrical Insulation
Good Adhesion to Metals
Low Melt Viscosity When Heated
(Easy to Cover)

Advantages of Powder Coatings（Our Estimation）

View Point	Powder Coatings	Thermoplastic Molding Materials	Heat Shrink Tubing (Thermoplastic)
Design Flexibility	○	○	△
Labor Saving	○	○	△
Mold Requirement	○	×	○
Adhesion to Metal	○	△	×
Implementation Environment	△	○	○

Epoxy Resin Powder Coating with High Tracking Resistance
（Developed Product, Our Measurement Values）

	Item	Unit, Condition	Product Developed
	Curing Condition	–	40 min at 170℃
Electrical	Tracking Resistance (CTI)	V, UL2597 STT	900
	Volume Resistivity	Ω・cm	1×10¹⁵
	Dielectric Breakdown Voltage	kV/mm, 1 mm	35

Thermal	Glass Transition Temperature	℃	135
Thermal	C.T.E (< Tg)	ppm, TMA	35
Mechanical	3-Point Bending Strength	MPa	100
	Shear Tensile Strength	MPa, C1100	13
	Dupont Impact Strength	cm, 1/16 inch, 500g, 500μm thickness	≧50

Test Method

Applications

Reduces Creepage Distance
No Mold Required
Increases Design Flexibility
Contributes to Labor Savings

For example, suitable for busbar insulation coating

Coating Method

Electrostatic coating is suitable for powder coating on metal.Powder particles are attached to metal surfaces by electrostatic attraction using a spray gun or a fluidizing bed, then they are cured by heating. You can select areas to coat by masking.

Coating to Curing Process (Cross-Section Image)