Anti-Pollution Flashover Coatings

Coating Sample	Density	Tensile Strength	Elongation at Break	Tensile Shear Strength
	≤1.28 g/cm3	≥3MPa	≥200%	≥3MPa
Blank	1.208	1.06	407	0.93
Competitor Product	1.266	3.15	412	3.14
HB-132	1.228	3.21	432	3.19

Density Analysis

Density affects the application performance of the coating and the quality of the final coating. The lower the density, the smaller the risk of sagging on vertical surfaces and top surfaces, resulting in better application performance. Therefore, the required density for coating samples should be ≤1.28g/cm³.

Among them, the density of the blank sample was 1.208g/cm³, which meets the requirement, but its mechanical properties are poor, indicating that simply reducing the density without support from reinforcing materials is not advisable.

The density of the competing product was 1.266g/cm³, close to the upper limit, posing a risk of sagging or requiring a larger amount of coating per unit area.

The density of HIFULL® HB-132 was 1.228g/cm³, at a moderately low level, ensuring good application adaptability while providing a reasonable basis for improving mechanical properties.

Tensile Strength and Elongation at Break

Tensile strength reflects the material’s ability to resist external force damage, while elongation at break indicates its flexibility and deformation resistance. Together, these determine the durability of the coating under environmental conditions such as temperature and humidity changes, mechanical vibrations, and corrosion. Therefore, it is required that the tensile strength of coating samples be ≥3MPa.

The tensile strength of the blank sample was only 1.06 MPa, far below the 3 MPa requirement, making it unable to meet actual usage demands. The tensile strength of the competing product was 3.15 MPa, just above the threshold, performing basically acceptably. The tensile strength of HIFULL® HB-132 reached 3.21 MPa, surpassing that of the competing product, indicating a denser internal structure and significant reinforcement effect from the fumed silica.

Regarding elongation at break, all three samples far exceeded the 200% requirement, demonstrating good toughness of the base resin system. Among them, HIFULL® HB-132 achieved 432%, higher than both the competing product and the blank sample, showing better deformation adaptability and greater advantage in alternating high-low temperature environments.

Tensile Shear Strength

Tensile shear strength is a key indicator for evaluating the bonding strength between the coating and the substrate, directly affecting the adhesion and long-term service reliability of the coating. Therefore, it is required that the tensile shear strength of coating samples be ≥3MPa.

Data shows that the tensile shear strength of the blank sample was only 0.93 MPa, seriously failing to meet standards. The competing product had a value of 3.14 MPa, barely passing. HIFULL® HB-132 stood at 3.19 MPa, superior to the competing product, displaying more excellent interfacial bonding performance, thanks to the interface enhancement effect brought by fumed silica.

Based on the above data analysis, researchers believe that HIFULL® HB-132 performs well in multiple key performance indicators when applied in anti-pollution flashover coatings:

These advantages stem from precise formulation, exquisite craftsmanship, and fine dispersion during the application and development process of HIFULL® fumed silica HB-132. By forming a three-dimensional network structure, fumed silica effectively enhances the matrix resin’s performance, optimizes filler distribution, reduces overall density, thus achieving a balance between strength and toughness. They will provide more reliable protection for the external insulation of power equipment, aiding the power industry’s progress towards safer, more stable, and efficient operations。