CF6849 3248 Epoxy-Phenolic Glass Fabric Laminate

3248 Epoxy-Phenolic Glass Fabric Laminate Description

3248 Epoxy-Phenolic Glass Fabric Laminate is a high-performance composite material produced by hot-pressing alkali-free E-glass fabric impregnated with epoxy resin. This laminate exhibits excellent mechanical strength, with vertical bending strength exceeding 360 MPa and tensile strength up to 314 MPa. It maintains high impact resistance, with Charpy impact strength greater than 37 kJ/m². Electrically, it demonstrates exceptional dielectric properties, including a dielectric strength of over 17 kV/mm in transformer oil at 90°C and a breakdown voltage exceeding 40 kV. The laminate also exhibits a low dielectric dissipation factor (≤0.04) and low water absorption (≤0.5%). Thermally, it is rated for Class F insulation, withstanding continuous use at temperatures up to 155°C. Its density ranges from 1.8 to 2.0 g/cm³, ensuring durability and stability in various applications. These properties make 3248 Epoxy-Phenolic Glass Fabric Laminate suitable for demanding electrical insulation and structural components in motors, transformers, and other electrical equipment operating under high temperature and humidity conditions. Its combination of mechanical strength, electrical stability, and thermal resistance ensures reliable performance in challenging environments.

3248 Epoxy-Phenolic Glass Fabric Laminate Applications

3248 Epoxy-Phenolic Glass Fabric Laminate is a high-performance composite material widely used in various industrial applications due to its exceptional mechanical strength, electrical insulation properties, and thermal stability. In the electrical industry, it serves as a reliable insulating material for components such as switchgear, transformers, and motor parts, ensuring safe and efficient operation in demanding environments. Its resistance to moisture and transformer oil makes it suitable for applications exposed to humid or submerged conditions. The laminate's high thermal resistance allows it to function effectively in high-temperature settings, making it ideal for use in electrical machinery and equipment operating at elevated temperatures. Additionally, its mechanical strength and durability make it a preferred choice for structural components in various industrial applications, contributing to the longevity and reliability of machinery and equipment. The versatility of 3248 Epoxy-Phenolic Glass Fabric Laminate across different sectors underscores its importance as a material that combines strength, insulation, and thermal resistance to meet the rigorous demands of modern industrial applications.

3248 Epoxy-Phenolic Glass Fabric Laminate Packaging

Our products are packaged in customized cartons of various sizes based on the material dimensions. Small items are securely packed in PP boxes, while larger items are placed in custom wooden crates. We ensure strict adherence to packaging customization and the use of appropriate cushioning materials to provide optimal protection during transportation.

Packaging: Carton, Wooden Box, or Customized.

Kindly review the packaging details provided for your reference.

Manufacturing Process

1.       Testing Method

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

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

(3)    Dimensional Inspection - Measures thickness, width, and length to ensure adherence to specified tolerances.

(4)    Surface Quality Inspection - Checks for defects such as scratches, cracks, or inclusions through visual and ultrasonic examination.

(5)    Hardness Testing - Determines material hardness to confirm uniformity and mechanical reliability.

Please refer to the SAM testing procedures for detailed information.

3248 Epoxy-Phenolic Glass Fabric Laminate FAQs

Q1. What is 3248 Epoxy-Phenolic Glass Fabric Laminate?

It’s a high-performance composite material made by hot-pressing alkali-free E-glass fabric impregnated with epoxy resin. This laminate offers excellent mechanical strength and stable electrical performance, even under high humidity and in transformer oil.

Q2. What properties does it offer?

3248 laminate has high tensile, flexural, and compressive strength, making it suitable for structural applications. It maintains good dielectric properties in both dry and wet conditions, with a high comparative tracking index, indicating resistance to electrical tracking. Thermally, it is rated for Class F insulation, withstanding continuous use at temperatures up to 155 °C.

Q3. How is it used in industry?

This laminate is widely used in electrical machinery, including motors, transformers, and switchgear components. Its resistance to moisture and transformer oil makes it ideal for applications in humid or submerged environments.

Related Information

1.       Common Preparation Methods

3248 Epoxy-Phenolic Glass Fabric Laminate is produced through a precise and highly controlled lamination process. First, woven E-glass cloth is impregnated with epoxy resin to form “prepreg” sheets. These sheets are partially cured (B-staged) to achieve the ideal tackiness for stacking. Multiple prepreg layers are then aligned in the desired orientation and placed into a hot press. Under elevated temperature (typically around 155 °C) and high pressure (hundreds of psi or more), the resin fully cures, consolidating the layers into a dense, void-free composite. After pressing, the laminate is cooled, trimmed to size, and subjected to quality checks. This includes ensuring uniform thickness, verifying dimensional stability, testing mechanical and electrical properties, and confirming flame-retardancy. The result is a robust, electrically insulating, flame- and arc-resistant laminate suitable for demanding industrial applications.