Brand: YILONG
Materials: Phenolic Resin + Cotton Cloth
Process: Laminated
Color: Brown, Black
Wall thickness: 2-200mm
OD: 10-1200mm
Length: 1000mm
Packaging: Pallet, Wooden Box
Description
The 3526 Phenolic Cotton Cloth Tube is similar to IEC PFCC22 laminated tube, is a composite tube made of laminated phenolic resin and cotton cloth, which is widely used in electrical insulation and mechanical protection fields. 3526 has high tensile strength, low water absorption, and is suitable for insulating structural parts that require high mechanical strength and can withstand a variety of mechanical processing.
We have tubes of below standards:
GOST Standard: 3526
IEC Standard: PFCC21, PFCC22, PFCC23
DIN: Hgw2086, Hgw2085, -
NEMA Standard: C, CE, L, LE
Features
Mechanical Strength – High strength and wear resistance for durable performance
Electrical Insulation – Excellent voltage resistance, suitable for electrical applications
Heat Resistance – Class B (130°C) heat resistance, flame retardant
Chemical Resistance – Resistant to acid, alkali, and low water absorption
Customization – Flexible sizes and specifications, with support for custom orders
ISO9001 Certified – Reliable quality and adherence to international standards
Applications
Used for insulating structural parts in motors, transformers, and electrical appliances. Ideal for bearings, sleeves, and high-strength mechanical parts in the mechanical industry. Suitable for corrosion-resistant pipes and seals in the chemical industry. Performs well in furnaces, heat exchangers, and other high-temperature environments. Also used for instrument components and electronic component brackets in precision machining.
Technical Data Sheet
| No. | Item | Unit | Range | Phenolic Cloth Laminates | ||||
| PFCC21 | PFCC22 | PFCC23 | PFCC24 | 3526 | ||||
| LE | L | CE | C | — | ||||
| HGW2086 | HGW2085 | — | — | — | ||||
| 1 | Flexural Strength (Perpendicular to Laminations) | MPa | ≥ | 90 | 80 | 80 | 100 | 80 |
| 2 | Compressive Strength (Axial) | MPa | ≥ | 110 | 100 | 100 | 120 | 45 |
| 3 | Shear Strength (Nominal Dia ≤100 mm) | MPa | ≥ | 90 | 90 | 90 | 100 | 80 |
| 4 | Electric Strength ⊥ (in oil at 90°C, wall thickness 1.6 mm) | kV/mm | ≥ | 2.1 | 2.1 | — | 2.1 | 3.5 |
| 5 | Breakdown Voltage Parallel to Laminations (in oil at 90°C) | kV | ≥ | 10 | 10 | 8 | 10 | 10 |
| 6 | Dissipation Factor (1 MHz) | — | ≤ | — | — | — | — | — |
| 7 | Dissipation Factor (48–62 Hz) | — | ≤ | — | — | — | — | — |
| 8 | Dielectric Constant (1 MHz) | — | ≥ | — | — | — | — | — |
| 9 | Insulation Resistance After Water Immersion (Nominal thickness ≥10 mm, nominal inner dia ≥8 mm) | MΩ | ≥ | 10 | 2 | 0.5 | 2 | 10 |
| 10 | Heat Resistance | ℃ | ≤ | 120 | 120 | 120 | 120 | 130 |
| 11 | Water Absorption | mg/cm² | ≤ | 5 | 10 | 13 | 5 | 4 |
| 12 | Density | g/cm³ | — | 1.15-1.35 | 1.15-1.35 | 1.15-1.35 | 1.15-1.35 | 1.15-1.35 |
| 13 | Flammability | Class | — | — | — | — | — | — |
| 14 | Standard | IEC 61212-3-1:2006 | GB/T 5132 | |||||
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