Water-based Enamelled Winding Wire Insulating Coating It exhibits excellent penetration and filling properties, making it particularly suitable for secondary insulation and reinforcement of magnet wires. Additionally, the paint applies uniformly both above and below, and its moisture-resistant performance refers specifically to the ability of various water-based insulating paints to resist moisture absorption. Since water serves as the carrier, after curing—whether using alkyd, acrylic (including polyester) resins—the coatings may still reabsorb moisture and even deliquesce over time. In contrast, water-based epoxy resins stand out with significantly superior moisture resistance in this regard. Moreover, they offer exceptional bonding strength, firmly securing materials together. Undoubtedly, epoxy resins boast among the strongest adhesive properties of commonly used insulating paints.

　　In addition to its core advantages, water-based enamelled winding wire insulation boasts an extremely low solvent content, making it non-flammable and non-explosive, while also being environmentally friendly and emitting very little odor. Moreover, the electromagnetic wire remains securely intact with strong bonding strength, and its economical usage cost further sets it apart.

　　We compared the customer case with traditional oil-based coatings. The water-based paint exhibited a hanging weight of 12.5 grams, while the oil-based paint had a suspension weight of 14.75 grams. As a result, the water-based insulating coating showed a lower hanging capacity compared to its oil-based counterpart. Another key factor is the evaporation rate. The water-based coating evaporated at 78 grams, whereas the oil-based paint lost a staggering 2,453 grams through evaporation. This significant difference in evaporation rates directly translates into varying usage costs. In fact, when calculating the amount of paint needed, the cost difference between the two isn’t dramatic. However, due to the highly volatile nature of oil-based paints—where evaporation occurs at an extremely rapid pace—it becomes painfully obvious to anyone who’s ever used them. In particular, some paint cans remain relatively open, leading to astonishingly high losses and waste within just one day. In contrast, water-based paints exhibit much slower evaporation, meaning their overall usage costs are significantly lower when factoring in both material consumption and environmental impact.

　　Water-based enamelled winding wire insulation coatings will follow a typical application process, most commonly involving suspension immersion. After suspension immersion, the wires are baked in an oven. Alternatively, continuous immersion machines can be used—these are particularly well-suited for water-based coatings. Of course, their production efficiency may be limited. If a customer requires high daily output levels, a continuous immersion machine might not meet the necessary production demands. A third option is continuous suspension immersing, which is a non-contact method.

　　No matter which process is used for water-based enamel-coated winding wire insulation—whether it’s batch impregnation or continuous impregnation—the three critical factors remain time, temperature, and ventilation. If even one of these three factors is not properly controlled, the water-based enamel-coated winding wire insulation may develop inherent defects during application. Therefore, the following points should be carefully considered when making your application:

　　1. The curing and film-forming mechanism of waterborne epoxy emulsions differs from that of other water-based coatings and solvent-based epoxy paints. In this case, the crosslinking and curing process occurs as particles interpenetrate and undergo internal diffusion during water evaporation. Therefore, it is particularly important to carefully control the curing temperature, baking time, and ensure adequate removal of water vapor.

　　2. Curing temperature ≥ 120°C, baking time ≥ 90 minutes.

　　3. Continuous dip coating equipment and suspended dip coating equipment feature excellent ventilation and exhaust systems, effectively meeting exhaust requirements.

　　4. The exhaust valve and blower of the vacuum impregnation equipment must remain open. If the connecting pipe vents at an elevated height, a centrifugal pump should be installed for reinforcement. Also, take care to prevent condensate from flowing backward.