Standard Filament–Reinforced Electrical Tape(F-380)
Standard Filament-Reinforced Electrical Tape is a high-strength electrical insulation tape constructed with polyester (PET) film and continuous fiberglass filaments aligned in the machine direction.
The reinforced construction provides excellent tensile strength, low elongation, and reliable dielectric performance.
It is widely used as motor winding tape, dry-type transformer insulation tape, and coil wrapping tape in electrical equipment manufacturing.
The tape helps stabilize wire bundles and coil structures while maintaining dependable insulation performance in electrical assemblies.
Overview
Standard Filament-Reinforced Electrical Tape combines a polyester insulation film with parallel fiberglass reinforcement to create a fiberglass reinforced electrical insulation tape designed for both mechanical reinforcement and electrical protection.
The PET backing provides stable dielectric properties, while the filament structure delivers high tensile strength along the tape length.
This design allows the tape to function as both a filament reinforced electrical tape and a reliable electrical insulation material.
Because of its mechanical strength and insulation stability, the tape is commonly used in manufacturing processes involving:
- electric motor winding
- transformer assembly
- generator coil production
- lead wire anchoring
- coil banding and coil reinforcement
- end-turn taping
- holding and separating ground insulation
- industrial electrical equipment manufacturing
In many applications, the tape functions as a motor winding tape or transformer insulation tape to secure wires and reinforce coil structures.
F-380 is primarily intended for motor, generator and dry-type transformer insulation and coil reinforcement. It is not qualified for direct exposure to transformer oil unless oil-compatibility, thermal-aging and corrosion data are confirmed for the exact grade.
Key Features
High Strength Filament Reinforcement
Continuous fiberglass filaments provide high tensile strength along the tape direction, allowing the tape to stabilize wires and coil structures during electrical assembly processes.
Reliable Electrical Insulation
The polyester film backing provides stable dielectric performance, enabling the tape to function as an electrical insulation tape in motors, transformers, and other electrical components.
Low Elongation for Coil Stability
Filament reinforcement minimizes tape elongation under tension, helping maintain stable positioning when used as coil wrapping tape or wire anchoring tape.
Thermal Stability
The tape is suitable for insulation systems up to Class F temperature rating (155°C).
Process Compatibility
The adhesive system remains stable during common electrical manufacturing processes such as varnish impregnation and thermal curing cycles.
Typical Applications
Standard Filament-Reinforced Electrical Tape is widely used in electrical manufacturing environments where both insulation and mechanical reinforcement are required.
Motor Winding
Used for lead wire anchoring, coil banding, and insulation reinforcement during motor assembly.
Dry-type Transformer Assembly
Functions as reinforced electrical insulation tape for stabilizing lead wires, supporting coil structures, and reinforcing insulation systems in dry-type transformer manufacturing.
Generator Coil Production
Used for coil wrapping, end-turn taping, and winding reinforcement during generator coil assembly.
Ground Insulation Holding and Separation
Helps hold and separate ground insulation materials in selected motor and transformer applications.
Electrical Equipment Manufacturing
Provides reinforced electrical insulation and mechanical support in industrial electrical components and assemblies.
For buyers selecting tape for motor leads, generator coils, dry-type transformer windings or ground-insulation support, see our Motor & Transformer Insulation guide for material selection by insulation position, winding tension, temperature exposure and varnish compatibility.
Electrical Insulation Performance
Typical electrical insulation properties are shown below.
| Property | Test Method | Typical Value |
| Dielectric Breakdown Voltage | IEC 60243 | ≥ 5 kV |
| Dielectric Strength | IEC 60243 | ≥ 38.5kV/mm |
| Insulation Resistance | IEC 62631 | ≥ 10¹² Ω |
| Volume Resistivity | ASTM D257 | ≥ 10¹⁴ Ω·cm |
These properties allow the tape to perform reliably in electrical insulation systems used in motors, transformers, and generator coils.
Thermal and Chemical Compatibility
The tape is designed for compatibility with common electrical insulation systems used in industrial manufacturing.
It can be used in processes involving:
varnish impregnation
thermal curing cycles
The adhesive formulation is designed for compatibility with common insulating materials such as:
polyester insulation varnish
epoxy resin systems
alkyd varnish
Compatibility with transformer insulating oils should be validated for oil-filled transformer applications.
Application-specific compatibility testing can be provided when required.
Copper Compatibility and Corrosion Resistance
The adhesive system is designed to be corrosion-neutral to copper conductors.
Testing according to IEC corrosion evaluation methods confirms that the tape does not promote electrolytic corrosion when used in contact with copper windings.
This ensures long-term reliability when the tape is used as:
- motor winding tape
- transformer insulation tape
- coil reinforcement tape
Technical Specifications
Typical product properties are shown below.
| Item | Specification |
| Backing Material | Polyester Film (PET) |
| Reinforcement | Fiberglass Filaments |
| Adhesive Type | Acrylic Pressure Sensitive Adhesive |
| Total Thickness | 0.13 mm |
| Tensile Strength | 750 N / 25 mm |
| Elongation | ≤ 5 % |
| Adhesion to Steel | 12 N / 25 mm |
| Temperature Rating | Class F (155°C) |
| Electrical Strength | 5(KV) |
Note: The values shown are typical data obtained under standard test conditions and should not be considered product specifications. Actual performance should be verified under the specific application, process, and end-use conditions.
Custom thickness and reinforcement structures may be available for specific electrical applications.
Standards and Test Methods
The tape is designed with reference to commonly used standards for electrical insulation tapes. Typical properties may be evaluated by applicable test methods under the following standards:
- IEC 60454-3-11 — Specifications for pressure-sensitive adhesive tapes for electrical purposes based on PET film / glass filament combinations
- IEC 60243 — Electric strength of insulating materials
- ASTM D3330 — Peel adhesion
- ASTM D3759 — Tensile strength
Quality Assurance
Each production batch undergoes quality inspection to ensure consistent performance.
Inspection procedures include:
- thickness verification
- tensile strength testing
- adhesion testing
Batch traceability ensures production records can be reviewed for industrial quality management requirements.
Downloads
Download TDS (PDF)
View All Datasheets
Request a Quote:
FAQ
Can this tape be used as motor winding tape?
Is the tape suitable for dry-type transformer insulation?
What insulation class does the tape support?
Is the adhesive compatible with varnish impregnation?
Does the tape cause corrosion on copper wires?
Is this tape suitable for dry-type or oil-filled transformers?
Buying Guides – All product selection guides
Comparison Articles – Product comparisons and feature analysis
Troubleshooting – Common issues and solutions
