Laminates

What Are the Different Grades of Phenolic Laminates & Benefits of Each?

Phenolic laminates are composite materials composed of layers of paper or fabric impregnated with phenolic resin, which are then cured under heat and pressure. These laminates are available in various grades, each offering distinct benefits based on their composition and properties. It is important to consult the specific manufacturer's documentation and product data sheets to understand the detailed properties, limitations, and recommended applications for each grade of phenolic laminate. The benefits and suitability of a particular grade may vary depending on the specific requirements of the intended application. Moore Addison works with a variety of commonly used grades of phenolic laminates. Here are several examples with their advantages:

• NEMA Grade X/XX/XXX
  These are general-purpose phenolic laminates. They are known for their high mechanical strength, excellent electrical insulation properties, and good resistance to moisture, heat, and chemicals. They are commonly used for applications such as electrical insulation, switchgear, terminal boards, and mechanical components.
• NEMA Grade C
  This grade of phenolic laminate is reinforced with a canvas fabric. It offers higher impact strength and dimensional stability compared to the X/XX/XXX grades. NEMA Grade C laminates are suitable for applications that require enhanced mechanical properties, such as gears, bushings, and bearing retainers.
• NEMA Grade LE
  LE stands for "low electrical conductivity." This grade of phenolic laminate is specifically designed to have low electrical conductivity, making it suitable for electrical insulation applications where high voltage and low leakage current are critical, such as in transformers and high-voltage insulation barriers.
• G-10/FR-4
  These are flame-retardant phenolic laminates. They are reinforced with glass cloth and offer excellent mechanical strength, dimensional stability, and electrical insulation properties. G-10/FR-4 laminates have self-extinguishing properties, making them suitable for applications that require flame resistance, such as electrical connectors, printed circuit boards (PCBs), and structural components.
• G-11
  G-11 laminates are similar to G-10/FR-4 laminates but offer higher temperature resistance. They can withstand continuous operating temperatures of up to 180°C (356°F) without significant loss of mechanical or electrical properties. G-11 laminates are commonly used in high-temperature electrical applications, such as electric motor insulation, coil forms, and insulating washers.
• XPC
  XPC stands for "phenolic cotton cloth." This grade of phenolic laminate is reinforced with cotton fabric, which provides good mechanical strength, excellent dimensional stability, and good electrical insulation properties. XPC laminates are often used in applications that require high impact resistance, such as tooling jigs, fixtures, and wear-resistant components.