Definition and Overview
3021 Phenolic Paper Laminates are high-performance composite materials produced by impregnating cellulose-based paper with phenolic resin, followed by a controlled hot-pressing process. These laminates are widely used in electrical insulation and mechanical engineering due to their reliability, durability, and cost-effectiveness. Compared to fabric-based phenolic laminates, 3021 laminates feature a dense, smooth surface that ensures excellent dimensional stability and uniform thickness, making them suitable for components requiring precise machining.
Key Features
3021 Phenolic Paper Laminates offer a range of properties that meet the demanding requirements of industrial applications:
l Excellent Electrical Insulation: High dielectric strength and low power loss ensure safe operation in electrical devices.
l Mechanical Durability: Strong resistance to impact, compression, and wear, making them suitable for structural components.
l Thermal Stability: Maintains performance under moderate operating temperatures, ideal for motors, transformers, and switchgear.
l Chemical Resistance: Resistant to oils, fuels, and mild chemicals, extending component lifespan.
l Dimensional Stability: Minimal warping or shrinkage under mechanical or thermal stress.
Applications in Industry
3021 Phenolic Paper Laminates are widely used in various industries:
l Electrical and Electronics: Insulating sheets for transformers, switchboards, terminal blocks, and printed circuit board supports.
l Mechanical Components: Gears, spacers, bushings, and other parts requiring durability and stability.
l Automotive Industry: Insulating elements in electric motors, starters, sensors, and connectors.
l General Manufacturing: Custom machined components for industrial machinery and consumer devices.
Comparison with 3025 Phenolic Paper Laminates
3021 and 3025 phenolic paper laminates share many characteristics, but there are key differences in density, mechanical strength, and electrical performance. 3025 is generally used for more demanding applications where higher mechanical strength or thermal endurance is required. The following table summarizes their main parameters:
|
Parameter |
3021 Phenolic Paper Laminate |
3025 Phenolic Paper Laminate |
Notes |
|
Density |
1.35–1.40 g/cm³ |
1.45–1.50 g/cm³ |
3025 is denser, offering higher mechanical strength |
|
Tensile Strength |
60–80 MPa |
80–100 MPa |
3025 better for heavy-duty mechanical stress |
|
Flexural Strength |
110–130 MPa |
130–150 MPa |
3025 stronger under bending load |
|
Compressive Strength |
300–350 MPa |
350–400 MPa |
3025 withstands higher compression |
|
Dielectric Strength |
16–20 kV/mm |
18–22 kV/mm |
3025 slightly higher insulation capability |
|
Water Absorption |
≤0.8% |
≤0.5% |
3025 absorbs less moisture, better for humid environments |
|
Operating Temperature |
120–130°C |
130–140°C |
3025 tolerates slightly higher temperatures |
|
Surface Finish |
Smooth |
Slightly rougher |
3021 better for precision machining |
YILONG INSULATION Advantages
YILONG INSULATION’s 3021 Phenolic Paper Laminates are manufactured with strict quality control to ensure uniformity, reliability, and superior performance. Key advantages include:
Consistent Electrical and Mechanical Performance: Reliable insulation and structural support for diverse applications.
Precision Thickness and Flatness: Reduces machining waste and improves assembly efficiency.
Chemical and Thermal Resistance: Suitable for challenging industrial environments.
Sustainable Manufacturing Practices: Ensures consistent quality while minimizing environmental impact.
Conclusion
3021 Phenolic Paper Laminates are a versatile, reliable, and cost-effective material for electrical insulation and mechanical applications. Their smooth surface, dimensional stability, and robust insulation properties make them ideal for transformers, switchgear, and precision-machined components. Compared to 3025, 3021 offers excellent surface finish and cost-effectiveness for general-purpose applications, while 3025 excels in high-strength or high-temperature scenarios. With YILONG INSULATION’s stringent quality standards, 3021 laminates continue to be a trusted choice in the industry.
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