How are epoxy fiberglass laminate rods defining industrial insulating materials？

Epoxy fiberglass laminate rods, commonly known as epoxy rods, are composite materials formed by impregnating non-alkali glass fiber cloth with epoxy resin and hot-pressing it through a molding die.

1. How is the epoxy fiberglass laminate rod made?

• Material Makeup: Constructed from non-alkali glass fiber cloth (as the reinforcing substrate) and epoxy resin (as the matrix binder).
• Manufacturing Process: The glass cloth is saturated with epoxy resin, layered, and then cured under heat and pressure in a cylindrical mold, resulting in a solid rod with uniform cross-section.

2. What are the key properties?

• High Mechanical Strength: Exhibits excellent tensile, bending, and compressive strength, suitable for load-bearing components in mechanical systems (e.g., shafts, supports) that require resistance to deformation.
• Superior Electrical Insulation: Maintains high dielectric strength and volume resistivity, making it ideal for insulating parts in high-voltage equipment (e.g., transformers, switchgear) to prevent electrical breakdown.
• Chemical Corrosion Resistance: Resistant to acids, alkalis, and salts, suitable for use in corrosive environments (e.g., chemical processing, marine applications) without degradation.
• Thermal Stability: Retains mechanical and electrical properties at elevated temperatures (typically up to 130°C for B-class insulation), suitable for heat-generating equipment.
• Good Machinability: Can be easily cut, drilled, milled, or threaded to custom dimensions, enabling precise fabrication for various applications.

3. What are the common uses of epoxy fiberglass laminate rods?

• Electrical & Electronics: Insulating rods, supports, and spacers in transformers, motors, generators, and circuit breakers.Substrates for printed circuit boards (PCBs) and components requiring high insulation.
• Mechanical Engineering: Structural components like gears, shafts, and handles that demand high strength and wear resistance.
• Aerospace & Aviation: Lightweight yet robust parts for aircraft interiors, satellite structures, and engine components.
• Chemical & Industrial: Corrosion-resistant pipes, casings, and fixtures in chemical plants, wastewater treatment, and marine engineering.

4. Common Standards & Types

• NEMA G-10/G-11: G-10 (EPGC21) offers medium-temperature mechanical and electrical properties, while G-11 (EPGC22) maintains strength at higher temperatures.
• FR-4: Flame-retardant variant (EPGC23) compliant with UL94 V-0, suitable for fire-sensitive applications.
• Equivalent Specifications: DIN Hgw2375, GB/T 5130 (China), and JB/T 10191 (mechanical standards).

In summary, epoxy fiberglass laminate rods combine the reinforcing strength of glass fiber with the adhesive and insulating properties of epoxy, making them versatile in high-performance industrial and technical applications.