Phenolic fabric laminated rods for processing parts

Phenolic fabric laminate is a high-performance insulating material. It is manufactured by impregnating cotton fabric with phenolic resin and then hot-pressing it under controlled temperature and pressure.

SJ TECH provides precision CNC machining services for phenolic resin rods, delivering custom components with excellent mechanical strength, electrical insulation properties, and dimensional stability.

Production process of phenolic fiber rods
1. Prepreg production (impregnated fabrics)

The cotton fabric is impregnated with phenolic resin and dried to a semi-cured state (stage B) to ensure that the resin content and stability are controlled.

2. Hot pressing

The prepreg is wound or stacked onto a mandrel and cured at 140–160°C and under pressure to form a dense laminated bar with strong internal adhesion.

3. Post-processing

After curing, the rods are demolded and further processed into finished mechanical parts.

Processing capacity

Phenolic fiber rods have excellent processing properties and can be processed using standard equipment:

CNC turning, milling,
Drilling, tapping
Cutting and grinding
Processing advantages:
The process is smooth with minimal deformation;
Stable size control;
Suitable for complex custom parts

Machining Considerations:
Use sharp cutting tools to prevent delamination.
Use air or non-aqueous coolants.
Control feed rate and spindle speed for a superior surface finish.
Technical Specifications:
Property | Typical Value
Density | 1.26 – 1.50 g/cm³
Flexural Strength | ≥ 90 MPa
Compressive Strength | ≥ 138 MPa
Dielectric Strength (in oil) | ≥ 10 kV
Insulation Resistance | 10¹² – 10¹⁴ Ω·cm
Operating Temperature | 120 – 150°C
Water Absorption | 1.0% – 1.7%
Warping | ≤ 2%
Key Features:
Excellent mechanical strength,
Capable of withstanding loads and impacts in structural applications.
Reliable electrical insulation,
High insulation resistance and dielectric properties.
Good heat resistance (Class E),
Stable operation at 120–150°C.
Good chemical resistance,
Resistant to common acids, alkalis, and solvents.
Self-extinguishing (flame-retardant),
Enhanced safety in electrical environments.
Good machinability,
Suitable for CNC machining and precision processing.

Application Areas:

Phenolic fiber rods are widely used in: the electrical industry (insulation components for motors, transformers, and high-voltage switchgear; oil-immersed insulation structures); the mechanical industry (gears, rollers, bearing cages, and load-bearing structural parts); tooling and fixtures (ICT/ITE test fixtures, industrial jigs, and molds); and special applications (thread-guiding rollers for the textile and glass fiber industries).

Why Choose SJ TECH
✔ Professional manufacturer of insulation materials
✔ Advanced CNC machining capabilities
✔ Strict process control ensuring consistent product quality
✔ Custom production based on drawings
✔ Fast delivery and extensive global export experience
Customization Options

We offer:

CNC machined parts with
custom diameters and lengths
OEM/ODM production
Manufacturing based on drawings or samples

👉 Send your drawings for a quick quote
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