CF6853 3250 Epoxy-Phenolic Glass Fabric Laminate

3250 Epoxy-Phenol-Glass Fabric Laminates Description

3250 Epoxy-Phenol-Glass Fabric Laminates is a high-performance composite material made from alkali-free glass fibre fabric impregnated with high-temperature resistant epoxy resin, providing exceptional mechanical strength, electrical insulation properties, and resistance to heat and moisture.

This laminate exhibits impressive mechanical properties, including a flexural strength perpendicular to the laminates of at least 340 MPa and a compressive strength perpendicular to the laminates of at least 350 MPa. The impact toughness is also excellent, with an Izod impact toughness parallel to the laminates of at least 42 kJ/m². These properties ensure the durability and reliability of the laminate in demanding applications.

Regarding electrical properties, the laminate offers a dielectric strength at 90°C in oil perpendicular to the laminates of at least 10.2 kV/mm and a breakthrough voltage at 90°C in oil parallel to the laminates of at least 45 kV. The insulation resistance after immersion in water is at least 50,000 MΩ, and the Comparative Tracking Index (CTI) is at least 200. Due to these attributes, it is suitable for high voltage electrical applications.

The thermal resistance of the laminate is rated at 130 °C, and the density ranges from 1.8 to 2.0 g/cm³. The maximum water absorption is minimal at 11.10 mg, ensuring stable performance in humid environments. These characteristics contribute to the suitability of the laminate for use in transformers, motors, and other electrical devices operating under harsh conditions.

3250 Epoxy-Phenol-Glass Fabric Laminates Applications

The 3250 Epoxy-Phenol-Glass Fabric Laminates is a high-performance composite material made from alkali-free glass fibre fabric impregnated with high-temperature resistant epoxy resin. This laminate provides exceptional mechanical strength, excellent electrical insulation properties, and resistance to heat, moisture, and transformer oil, making it suitable for demanding applications in electrical and mechanical systems.

The high mechanical strength of the laminate ensures longevity and reliability in structural applications, while its excellent electrical insulation properties make it ideal for use in electrical components. Its resistance to heat, moisture, and transformer oil allows it to operate effectively under varying environmental conditions, maintaining consistent performance over time.

The 3250 Epoxy-Phenol-Glass Fabric Laminates is widely used in the production of electrical insulation components such as busbars, terminal boards, switchgear, and transformers. Its versatility and strong properties make it a preferred choice for applications requiring high strength and reliability at elevated temperatures.

In summary, the 3250 Epoxy-Phenol-Glass Fabric Laminates offer a combination of high mechanical strength, excellent electrical insulation, and resistance to heat, moisture, and transformer oil, making it an ideal material for demanding applications in electrical and mechanical systems.

3250 Epoxy-Phenol-Glass Fabric Laminates Packaging

Our products are packaged in custom cartons of various sizes according to the dimensions of the material. Smaller items are securely packed in PP cartons, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging specifications and the use of appropriate cushioning materials to provide optimal protection during transport.

Packaging: Carton, Wooden crate, or custom.

Please see the packaging details for your information.

Manufacturing Process

1)Testing Procedures

(1)Chemical composition analysis - Verified using techniques such as GDMS or XRF to ensure compliance with purity requirements.

(2)Testing mechanical properties - Includes tensile strength, yield strength, and elongation tests to assess material performance.

(3)Dimension measurement - Measures thickness, width, and length to ensure compliance with specified tolerances.

(4)Surface quality inspection - Checking for defects such as scratches, cracks, or inclusions through visual and ultrasonic inspection.

(5)Hardness testing - Determining material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM Testing Procedures for detailed information.

3250 Epoxy-Phenol-Glass Fabric Laminates FAQs

Q1. What operating temperatures can the 3250 laminate withstand?

The 3250 laminate is an insulation material of Class H, designed for temperatures up to 180 °C, offering high thermal stability in demanding environments.

Q2. What are the typical applications?

Commonly used in high-temperature insulation components for large motors, transformers, switchgear, busbars, and terminal boards - particularly for slot wedges and structural components requiring Class H performance.

Q3. How does it resist moisture and wet conditions?

With high electrical stability under wet conditions, water absorption remains low (≤22 mg for 3 mm thick plates), ensuring insulating effectiveness even in humid or oil-immersed environments.

Related Information

1.Common preparation methods

The 3250 Epoxy-Phenol-Glass Fabric Laminates are produced by chemically treating alkali-free glass fibre fabric, thoroughly impregnating it with high glass transition epoxy-phenol resin, and then hot pressing the stacked layers under controlled temperature and pressure. This process cures the resin and fuses the layers into a dense,high-strengthcomposite board with outstanding thermal stability (Class H quality), excellent electrical insulation even in humid or oil-immersed environments and strong mechanical properties, making it ideal forelectrical and mechanical applicationsat high temperatures.