At Sjcncin Insulation, we specialize in the development and manufacturing of advanced insulation materials and engineering plastic sheets. Supported by an experienced R&D team and modern production facilities in Wuxi, China, we provide reliable insulation solutions for power transmission, electrical equipment, industrial furnaces, and composite engineering applications worldwide.

Quick Product Summary

Product Name	3840 Epoxy Resin Insulating Rod (EPGC41)
Main Material	Epoxy Resin + High Strength Fiberglass
Manufacturing Process	Continuous Pultrusion
Diameter Range	Φ5mm – Φ200mm
Operating Temperature	170°C – 210°C Continuous
Short-Term Temperature	Up to 280°C
Tensile Strength	≥1200 MPa
Insulation Class	Class H
Colors Available	Aqua Green, Yellow
Applications	Composite Insulators, Switchgear, High Voltage Equipment, Industrial Furnaces

Product Overview

EPGC41 epoxy fiberglass insulating rods are engineered using high-strength continuous glass fiber reinforcements fully impregnated with epoxy resin systems. Through precision pultrusion and thermal curing technology, the material forms a highly consistent insulation rod with excellent dimensional stability and mechanical performance.

The material can be manufactured in round rods, square bars, wedges, channels, I-beams, and customized profiles according to customer drawings. Unlike conventional insulating materials, EPGC41 offers superior electrical insulation and structural strength simultaneously, making it ideal for demanding industrial environments.

The product complies with GB/T 13096-2008 and JB/T 10944-2010 standards and meets RoHS 2.0 environmental requirements.

Key Features

Exceptional Mechanical Strength

The tensile strength reaches ≥1200 MPa, making the rod suitable for both insulation and load-bearing applications. The high fiber content ensures excellent performance under tension, compression, and bending loads.

Outstanding Electrical Insulation

The insulation performance supports voltage applications ranging from 10kV to 1000kV, making the material suitable for power distribution and transmission systems.

High Temperature Resistance

The product operates continuously between 170°C and 210°C while tolerating short-term exposure up to 280°C without significant degradation.

Superior Corrosion Resistance

The epoxy matrix protects against moisture, chemicals, stress corrosion, and environmental aging, ensuring long-term stability in outdoor and industrial environments.

Excellent Machinability

The material supports sawing, drilling, milling, turning, planing, and tapping operations, allowing flexible customization for engineering projects.

Applications

Industry	Application
Power Transmission	Composite insulators and support structures
Switchgear Manufacturing	Disconnect switches and insulation supports
High Voltage Equipment	Electrical insulation components
Industrial Furnaces	High-temperature insulation systems
Steel Manufacturing	Electric furnace insulation
Aluminum Industry	Smelting equipment insulation
Calcium Carbide Plants	Electrical and thermal insulation structures
Composite Engineering	Custom pultruded structural profiles

Technical Parameter Table

Property	Regular Type	Acid Resistant Type
Density	≥2.1 g/cm³	≥2.1 g/cm³
Water Absorption	≤0.05%	≤0.05%
Tensile Strength	≥1200 MPa	≥1200 MPa
Suction Test	≥15 min	≥15 min
Water Diffusion Test	≤0.5 mA	≤0.5 mA
Volume Resistivity	≥10¹⁰ Ω·m	≥10¹⁰ Ω·m
Stress Corrosion Resistance	–	≥96 h
DC Breakdown Voltage	≥50 kV	≥50 kV
Lightning Impulse Voltage	≥5 Times	≥5 Times
Hot-State Bending Failure Load	≥230%	≥230%
Flame Retardancy	V0	V0

Dimension Specifications

Item	Specification
Diameter	Φ5mm – Φ200mm
Length	Customized According to Requirements
Color	Aqua Green / Yellow
Shape Options	Round, Square, Wedge, Channel, I-Beam, Custom Profiles

Advantages of EPGC41 Epoxy Fiberglass Rods

Advantages	Customer Benefits
High Tensile Strength	Improved structural reliability
Excellent Dielectric Performance	Enhanced electrical safety
Low Water Absorption	Stable insulation performance
Corrosion Resistance	Long service life
Heat Resistance	Suitable for harsh environments
Easy Machining	Reduced fabrication costs
RoHS Compliance	Environmental compliance

Manufacturing Process

The production process begins with premium-grade continuous fiberglass rovings that are thoroughly impregnated with specially formulated epoxy resin systems. The saturated fibers pass through precision molds where shaping, curing, and consolidation occur under controlled temperature conditions.

The pultrusion process provides exceptional consistency, superior fiber alignment, and excellent dimensional accuracy. This manufacturing method produces insulation rods with significantly better mechanical and dielectric properties than many traditional insulation materials.

Quality Assurance

Every batch undergoes strict quality inspection to ensure compliance with international performance standards. Critical parameters such as tensile strength, density, dielectric performance, water absorption, and dimensional tolerances are carefully tested before shipment.

Sjcncin Insulation maintains a strong focus on continuous product improvement and customer satisfaction. Our engineering team works closely with customers to develop customized insulation solutions for demanding electrical and industrial applications.

Packaging & Storage

Item	Description
Primary Packaging	Kraft Paper Wrapping
Secondary Protection	Waterproof Plastic Bag
End Protection	Paper Tube Core with Brackets
Outer Packaging	Carton with Strapping
Storage Environment	Dry, Clean, Ventilated Warehouse
Storage Temperature	Below 5°C
Shelf Life	Up to 6 Months

Frequently Asked Questions

1. What is EPGC41 epoxy insulating rod used for?

EPGC41 is primarily used in composite insulators, switchgear, high-voltage equipment, electric furnaces, and industrial insulation systems requiring high mechanical strength and dielectric performance.

2. What temperature can the insulation rod withstand?

The rod can operate continuously at temperatures between 170°C and 210°C and withstand short-term exposure up to 280°C.

3. Can the rods be customized?

Yes. Diameter, length, color, and profile shape can all be customized according to project requirements and engineering drawings.

4. Is the material suitable for outdoor use?

Yes. The product offers excellent resistance to moisture, corrosion, UV exposure, and environmental aging, making it suitable for outdoor electrical applications.

5. Does the product comply with environmental standards?

Yes. The product complies with RoHS 2.0 requirements and follows relevant national insulation material standards.

6. What machining operations can be performed on the rod?

The material can be cut, drilled, milled, turned, planed, and tapped, providing flexibility for various industrial assembly and fabrication needs.

About Sjcncin Insulation

Sjcncin Insulation is a modern manufacturing enterprise specializing in insulation materials and engineering plastic sheets. Located in Houqiao Industrial Park, Xinwu District, Wuxi City, Jiangsu Province, China, the company combines advanced manufacturing equipment, strong R&D capabilities, and professional technical support to deliver high-quality insulation products for global customers.

With a young and innovative engineering team, Sjcncin Insulation continues to develop reliable insulation solutions that meet the evolving requirements of electrical, energy, transportation, and industrial markets worldwide.