Overview
Phenolic resin board, commonly referred to as 'bakelite board,' is a thermosetting plastic laminate made by impregnating layers of paper or fabric with phenolic resin and then compressing them under heat. Developed in the early 20th century, it was one of the first synthetic plastics and remains vital in industrial applications due to its durability and versatility. This material is prized for its balance of mechanical strength, electrical insulation, and resistance to heat and chemicals. Unlike thermoplastics, phenolic boards do not melt upon reheating, making them suitable for high-temperature environments. Their affordability and ease of machining further contribute to widespread use.
Physical and Chemical Properties
Phenolic resin boards exhibit exceptional stability under stress and heat, with a typical operating temperature range of -40°C to 120°C. Their density ranges from 1.3 to 1.4 g/cm³, providing a lightweight yet robust structure. The material's insulation resistance exceeds 10^12 ohm-cm, making it ideal for electrical components. Chemically, phenolic boards resist weak acids, alkalis, and organic solvents, though prolonged exposure to strong acids or bases may cause degradation. They are non-conductive and flame-retardant, often achieving UL94 V-0 ratings. Surface finishes can vary from smooth to textured, depending on the reinforcing material used during manufacture.
Main Applications
In the electrical industry, phenolic boards serve as insulating substrates for circuit breakers, switchgear, and transformer components. Their dielectric strength and arc resistance prevent electrical failures in high-voltage applications. Mechanical uses include gears, bearings, and wear plates, where low friction and high dimensional stability are critical. In construction, they are employed as durable wall panels or flooring underlayments. Specialty grades with added fillers (e.g., graphite or mica) cater to niche applications like aerospace or automotive parts.
Safety and Storage
While phenolic resin boards are generally safe, machining processes generate dust that requires proper ventilation or PPE (e.g., N95 masks). The material emits trace formaldehyde when overheated (>150°C), necessitating controlled workshop environments. Storage recommendations include keeping boards flat to prevent warping and away from moisture to maintain insulation properties. UV exposure should be minimized to prevent surface discoloration. Bulk purchases should be stacked with protective interleaving to avoid scratches.
B2B Procurement Guide
Industrial buyers should prioritize suppliers with ISO 9001 certification to ensure consistent quality. Key specifications to confirm include thickness tolerance (±0.1–0.5 mm), flame resistance ratings, and flexural strength (typically 70–120 MPa). For cost efficiency, consider purchasing standard-sized sheets (e.g., 4' x 8') unless custom cuts are required. Lead times vary from 1–4 weeks for specialty grades. Sample testing is advised for critical applications, particularly where thermal cycling or chemical exposure is expected.
Related Manufacturers
- 主营：无机预涂板、硅酸钙板、纤维水泥板、穿孔吸音板、防爆泄压板、吊顶天花板、吊顶压花板、隧道钢钙板、硅酸盐防火板、水泥外墙挂板、洁净板、冰火板、硅晶板
- 主营：玻镁板、防火板、硫酸镁板、玻镁防火板、防火玻镁板
- 主营：密度仪、粘度计、软化点测定仪、承载板测定仪、电动击实仪、车辙试验机、混合料拌和机、乳化沥青电荷仪、车辙试样成型机、光谱仪、测试仪、回弹仪、贯入仪、抛光机、振动台、分析仪、检测仪、芯样磨平机、测厚仪、抗折抗压一体机、粘度仪、胶砂搅拌机、测量仪、恒温水浴、建筑门窗综合物理性能