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Phenolic cotton cloth lamiate tube（PFCC21A/24A ）
Standard: IEC61212-2006, GB/T5132-2009
Regular Size: 1000mm(support customize)
Wall thickness: 2.5-200mm
Diameter:Ф9mm-Ф1030mm
Thermal rating: Class E(120℃)
Color: Brown/black
Application:oil transformers,switchgear,Electric motors, Wear-resistant bushings
Phenolic Cotton Cloth Tubes are high-strength rigid insulation materials manufactured by winding electrical-grade cotton cloth impregnated with phenolic resin under heat and pressure. Characterized by exceptional mechanical toughness, superior machinability, and natural wear resistance, these tubes are essential components in oil-immersed transformers, electric motors, and switchgear. They are widely used as insulating supports, bushings, and operating rods, and are frequently machined into wear-resistant sleeves or gears for textile and mining machinery due to their ability to withstand high impact and friction.
High mechanical strength and impact resistance
Good electrical insulation properties
Excellent wear resistance and machinability
Stable performance under medium-temperature conditions
Oil resistance, suitable for oil-immersed equipment
Insulation sleeves for motors and generators
Transformer insulation structural parts
Insulating supports in switchgear
Wear-resistant bushings in machinery
Structural insulation components in electrical equipment
1.Factory: We operate a professional electrical insulation materials manufacturing facility and are ISO-certified.
2.Fully Automated Production: Our advanced automated workshop is supported by a strict and comprehensive quality management system.
3.Quality Inspection: Equipped with four major laboratories and five core product performance testing capabilities.
4.Processing Services: We provide customized processing solutions based on your requirements, ensuring high quality and on-time delivery.
5.Product Certification: Our products comply with UL, SGS, RoHS, and REACH standards. Sample testing is available upon request.
6.Ready Stock Supply: Standard products can be delivered within 7–15 days.
Our company is certified to ISO 9001, ISO 14001, and ISO 45001 management systems. Our products also comply with international certifications and reports including UL, RoHS, REACH, MSDS, CEMT, as well as factory inspection and test reports provided before shipment.
We are a professional manufacturer of phenolic cotton cloth tubes, which can be customized according to your needs
| Number | Item | Unit | Value |
| 1 | Density | g/cm3 | 1.2-1.3 |
| 2 | Flexural Strength at Perpendicular Lamination （Under Normal） | MPa | ≥138 |
| 3 | Axial Compressive Strength | MPa | ≥118 |
| 4 | Dielectric Strength at Perpendicular Lamination （Transformer Oil at 90℃） | KV/mm | ≥3.5 |
| （Wall Thickness:3.0mm, Bore Size:20mm） | |||
| 5 | Water Absorption (3mm) | % | ≤5 |
| 6 | Thermal Index | – | 120 |
| Name | Unit | Value |
| Minimum Wall Thickness | mm | 2 |
| Maximum Wall Thickness | mm | 200 |
| Minimum Bore Size | mm | 10 |
| Maximum Bore Size | mm | 1200 |
| Length | mm | 1000 |
