Description
Manufacturing Excellence
SIDA Phenolic Cotton Cloth Laminated Products are engineered through a precision manufacturing process where multiple layers of high-quality cotton cloth are saturated with phenolic resin, baked into prepreg form, and then consolidated through hot-press molding. This process creates dense, uniform structures with outstanding mechanical integrity and electrical insulation performance. Our products conform to international standards including GB/T 1303-2009, IEC 60893-3-4, and NEMA LI-1 grades C and CE
Key Features & Advantages
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Superior Mechanical Properties: High flexural strength (≥100 MPa) and compressive strength (≥147 MPa) ensure reliable performance under mechanical stress
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Excellent Electrical Insulation: Volume resistivity of 10⁷-10⁸ Ω·cm and breakdown voltage ≥10 kV in transformer oil
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Thermal Stability: Class E insulation rating (120°C continuous operation) with short-term capability up to 300°C
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Easy Machinability: Can be drilled, milled, turned, and threaded without delamination
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Dimensional Stability: Maintains structural integrity and tight tolerances even in humid conditions
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Chemical Resistance: Resistant to most oils, greases, and weak chemicals (note: not suitable for strong acids/alkalis)
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Certified Quality: UL approved (E310670), REACH and RoHS compliant
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Versatile Forms: Available as sheets, rods, and tubes with customizable dimensions
Technical Data Tables
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Property requirements; Norm 60893-3-4©IEC:2003 (German version: EN 60893-3-4:2004) |
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Property |
IEC 60893-2 Subclause |
Unit |
Min. oder Max. |
Thickness of sheet to which test is applicable mm |
Type |
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|
PF CC 201 |
PF CC 202 |
PF CC 203 |
PF CC 204 |
PF CC 305 |
PF GC 201 |
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Flexural strength |
5.1 |
Mpa |
Min. |
≥ 1,6 |
100 |
90 |
110 |
100 |
125 |
140 |
|
Charpy impact strength ║to lamination (note 3) |
5.4.2 |
kJ/m² |
Min. |
≥ 5 |
8,8 |
7,8 |
7 |
6 |
6 |
25 |
|
Izod impact strength ║to lamination (note 3) |
5.4.3 |
kJ/m² |
Min. |
≥ 5 |
5,4 |
5,9 |
5,9 |
4,9 |
4,9 |
29 |
|
Electrical strength at 90 °C in oil ┴ to lamination |
6.1.1 |
kV/mm |
Min. |
≤ 3 |
table 6 |
table 6 |
table 6 |
table 6 |
table 6 |
table 6 |
|
Breakdown voltage at 90 °C in oil ║to lamination |
6.1.1 |
kV |
Min. |
> 3 |
1 |
20 |
1 |
20 |
1 |
20 |
|
Insulation resistance after immersion in water |
6.3 |
M Ω |
Min. |
All |
1 |
5×101 |
1 |
5×101 |
1 |
1×10² |
|
Water absorption |
8.2 |
mg |
Max. |
All |
table 7 |
table 7 |
table 7 |
table 7 |
table 7 |
table 7 |
Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.
Application Scenarios
Electrical & Power Industry
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Transformer Insulation: Structural components, spacers, and insulating supports in oil-immersed transformers
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Motor & Generator Parts: Insulating sleeves, end plates, and slot wedges
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Switchgear Components: Base plates, terminal supports, and arc barriers
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Circuit Breakers: Insulating links and operating rods
Mechanical & Industrial Equipment
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Gear Wheels: Lightweight, wear-resistant gear components
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Friction Surfaces: Brake linings and clutch plates
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Bushings & Bearings: Self-lubricating bearing materials
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Structural Supports: Machine bases and equipment frames
Automotive & Transportation
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Electrical System Insulation: Battery trays, fuse holders
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Engine Components: Thermal shields and insulating spacers
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Transmission Parts: Wear pads and thrust washers
Aerospace & Defense
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Aircraft Electrical Systems: Lightweight insulating components
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Communication Equipment: RF insulating supports
Special Considerations
⚠️ Environmental Limitations: Not recommended for continuous exposure to strong acids, strong alkalis, or organic solvents like acetone
In high-humidity coastal environments, additional moisture-proofing treatments are advised to maintain long-term insulation resistance
⚠️ Voltage Limitations: Not suitable for ultra-high voltage applications above 220kV without additional insulation enhancements
Frequently Asked Questions (FAQs)
A: Phenolic cotton cloth laminates offer higher mechanical strength and better machinability than paper-based phenolics, making them ideal for structural applications. However, paper phenolics have slightly better dielectric properties for pure electrical applications.
A: Yes, our rods machine excellently and can be threaded for use as insulating bolts, nuts, and threaded rods. Standard thread sizes M12, M16, and M20 are readily available
A: Water absorption is typically ≤2.2% after 24 hours
A: No, phenolic cotton cloth laminates are not certified for food contact. They are designed for industrial electrical and mechanical applications only.
A: Our phenolic laminates can be sawed, drilled, milled, turned, ground, and tapped with standard carbide tools. They exhibit minimal delamination and maintain tight tolerances.
A: Standard products have no MOQ. Custom machined parts require a minimum order of 50 pieces or 100kg, depending on complexity.
A: 3025 is the standard grade for general-purpose sheets. 3723 is the rod-specific grade with optimized mechanical properties for cylindrical applications. Both offer similar electrical performance.
A: All products are UL 94 HB rated, with UL certification (E310670), REACH, and RoHS compliance available upon request
Testing Standards & Quality Assurance
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IEC 60893-3-4: Insulating materials – Industrial rigid laminated sheets based on thermosetting resins
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GB/T 1303-2009: Industrial rigid laminated sheets and rods based on thermosetting resins for electrical purposes
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GB-T 5132.1-2009 / IEC 61212-1:2006: Insulating materials – Industrial rigid round laminated tubes and rods
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NEMA LI-1: Standards for industrial laminates (grades C, CE)
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UL 94: Flammability testing
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ISO 527, ISO 179, ISO 75: Mechanical and thermal property testing