1. The Dominant Role of Glass Fiber Glass fiber is the primary structural material in insulating core rods, serving as the reinforcing "skeleton." In composite insulators used domestically, glass fiber accounts for approximately 80% of the core rod's total weight and about 65% of its volume. Consequently, the properties of the glass fiber dictate the overall performance of the core rod. 2. Advantages of E-Glass (Alkali-Free Glass Fiber) Composite insulator core rods typically utilize E-glass (Alkali-free glass fiber). E-glass is primarily composed of silicon dioxide (SiO₂), aluminum oxide (Al₂O₃), and boron oxide (B₂O₃). These oxides possess stable molecular structures and exist in a crystalline...

Process Overview The pultrusion process for insulating core rods involves non-twisted fiberglass rovings being impregnated with resin in a dip tank at a controlled traction speed. After being pre-formed by specialized equipment, the materials enter the mold cavity. The final product is formed through complex physical and chemical reactions as it passes through specific zones: cooling, preheating, gelation, and curing. The fundamental solidification of the core rod occurs within the mold cavity. Therefore, the process parameters for each zone must be strategically selected based on the continuous movement and phase transitions of the impregnated fibers inside the mold. Zone Analysis within the Mold Cavity ...

Taporel's High-Temperature and Acid-Resistant Composite Insulator Core Rods offer not only exceptional mechanical and electrical properties but also superior stress-corrosion resistance integrated into our high-temperature resistant formula. Our core rods have successfully passed a 7,200-hour stress-corrosion resistance test, vastly exceeding the industry standard requirement of only 96 hours. This makes our products a leader in long-term reliability for harsh environments. Applications & Environments These core rods are compatible with various composite insulator manufacturing processes, especially injection molding. We strongly recommend using our high-temperature and acid-resistant rods for insulators installed in: High-pollution areas (Industrial zones, coastal regions). Regions prone to acid rain. Technical Classifications & Specifications Our composite core rods...

No. Technical Requirements / Parameters Unit Specification 1 Density (at 20±2°C) g/cm³ ≥ 2.15 2 Water Absorption % ≤ 0.05 3 Tensile Strength MPa ≥ 1260 4 Tensile Modulus kN/mm² ≥ 56 5 Flexural Strength MPa ≥ 900 6 Compressive Strength MPa ≥ 590 7 Torsional Strength N/mm² ≥ 90 8 Hot Flexural Strength (at 150°C) MPa ≥ 300 9 Dye Penetration Test min ≥ 15 10 Water Diffusion Test (1% NaCl boiling 100h, 12kV, 1 min) μA ≤ 100 11 Power Frequency Breakdown Voltage kV/cm ≥ 56 12 Full-wave Impulse Voltage kV/cm ≥ 95 13 Heat Deflection Temperature (HDT) °C ≥ 155 Applicable Standards:Our products comply with GB, DL, IEC, and ASTM international standards, as well as Enterprise Standards.

IntroductionDefects in composite insulator core rods are often unavoidable during the manufacturing process. How can these defects be accurately diagnosed? Today, Taporel Electrical Insulation will share some professional knowledge regarding infrared diagnostic techniques. 1. Infrared Characteristics of Internal Defects in Composite Insulators The primary heat sources in composite insulators include polarization loss, partial discharge (PD), and leakage current. Polarization loss and PD are typically caused by excessive electric field concentration due to internal defects. Heating caused by leakage current is mainly manifested as surface degradation. The current concentrates at these degraded areas, creating a significant temperature difference compared to the surrounding regions. Generally,...