Phenolic Paper sheet

Raw Materials & Production Process

• Raw Materials: High-quality bleached wood pulp paper and cotton-linter paper are commonly used as reinforcement materials. The phenolic resin used is synthesized from high-purity petrochemical raw materials.
• Production Process: Electrical insulating paper is first impregnated with phenolic resin, allowing the resin to fully penetrate the paper fibers. The impregnated paper is then baked to remove solvents and moisture. Multiple layers of this treated paper are stacked and hot pressed under high temperature and pressure, during which the phenolic resin cures and firmly bonds the sheets into a solid laminate. The final product is obtained after cutting and trimming.

Product Features

• Excellent Mechanical Properties: It has high strength and hardness, with good mechanical durability. It can withstand significant external force and impact without delaminating or cracking, making it suitable for applications with demanding mechanical requirements.
• Outstanding Electrical Insulation: It offers good insulation properties under normal conditions, effectively preventing current leakage and helping avoid short circuits and other electrical hazards. Ideal for use in insulating structural components of electrical equipment.
• Good Heat Resistance: It meets insulation heat resistance class E (up to 120°C) and maintains stable performance in medium-temperature environments. It can also be used in transformer oil.
• Good Machinability: It can be processed by sawing, drilling, planing, punching, and shearing into various shapes and sizes to meet diverse application needs.

Product Specifications

• Colors: Commonly available in orange-red, black, yellow, brown, etc.
• Standard Sizes: Thickness typically ranges from 1 to 50 mm, with common options including 3mm, 4mm, 5mm, 6mm, 8mm, and 10mm. Standard sheet sizes include 1000mm × 2000mm and 1220mm × 2440mm.

Application Fields

• Electrical Industry: Widely used in motors and electrical equipment as insulating structural parts, such as insulation boards, terminal boards, and brackets. Its excellent electrical and mechanical performance ensures safe and reliable operation of electrical devices.
• Electronics Industry: Suitable for use as backing boards for PCB drilling, distribution boxes, jigs, mold base plates, and low/high voltage wiring boxes. Also used in the manufacturing of insulating parts in ICT and ITE test fixtures, test jigs, silicone rubber keypad molds, etc.
• Other Fields: Can be used to produce mechanical parts that require both strength and insulation, as well as in consumer products like packaging machines and combs.

Precautions

Although phenolic paper laminate offers good insulation, avoid direct contact with high-voltage conductors during use to prevent electric shock.

Avoid prolonged exposure to high temperatures, which may affect its performance.

During storage and use, protect the surface from sharp objects to avoid damaging its insulation properties and appearance.