Glass Filament Reinforced Tapes

Description

GFRTs are constructed from a glass filament reinforcement embedded in a flexible polymer carrier, then coated on one or both sides with an adhesive suited to the operating temperature and substrate. The glass filaments provide high tensile strength and dimensional stability, while the adhesive (commonly rubber or acrylic chemistries) determines heat resistance, chemical compatibility, and surface adhesion. GFRTs resist abrasion and edge-tearing, enabling long service life in tight winding environments and in locations where insulation layers must remain securely in place during assembly and operation. They are particularly advantageous in applications where conventional tapes might fail to maintain tension or where insulation materials are subject to mechanical vibration and thermal cycling. GFRTs typically exhibit dielectric strengths suitable for electrical insulation tasks and maintain performance across a broad temperature range when paired with appropriate adhesive chemistries.

Typical advantages:

• High tensile strength and resistance to edge-tear

• Excellent conformability around irregular shapes and coil windings

• Good dielectric properties and electrical insulation performance

• Compatibility with high-temperature environments when using suitable adhesives

• Secure bonding that withstands vibration and handling during assembly

Common use cases:

• Heavy banding of insulation wraps on coils, transformers, and motors

• Securing insulation blankets and jackets on piping and ductwork

• Bundling and tying electrical leads, coil leads, and related assemblies in electrical equipment

Main parameters

• Thickness: 0.17–0.33 mm

• Width: 8–50 mm

• Insulation class (adhesive-dependent): F class 130°C or 155°C

• Adhesive options: rubber-based (lower-temperature variants) and acrylic-based (higher-temperature variants)

• Tensile strength: superior to standard glass cloth tapes (exact values depend on construction and adhesive)

• Dielectric strength: high, suitable for coil and transformer applications

Data table

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

• Heavy coil winding and securing insulation layers in transformers, motors, and large electrical machines.

• Securing insulation blankets in high-temperature equipment and systems with exposed or semi-exposed insulation surfaces.

• Banding insulation on piping systems where jackets or facings require robust securing measures.

• Temporary or semi-permanent fastening during assembly and testing where non-permanent solutions are preferred.

FAQs

• What is GFRT and how does it differ from standard glass cloth tape?

  • GFRT uses fiberglass reinforcement embedded in a carrier with high-tensile strength and enhanced edge-tear resistance, typically offering better mechanical performance than standard glass cloth tapes. The adhesive system chosen (rubber or acrylic) dictates temperature ratings and dielectric properties.​

• What temperatures can GFRT handle?

  • Temperature ratings depend on the adhesive: commonly 130°C for rubber-based adhesive and up to 155°C for acrylic-based adhesive in insulation and winding applications.​

• Can GFRT be used on coil windings exposed to moisture or chemicals?

  • GFRTs with appropriate adhesives (often acrylic-based) offer good resistance to chemicals and solvents, but compatibility should be confirmed with the adhesive datasheet and the specific environmental exposure.​

• Are there any precautions when applying GFRT?

  • Ensure proper overlap to enable self-adhesion around the material and avoid gaps that could allow movement under vibration. Follow recommended tension and winding guidelines from the manufacturer.​

• How do I select the right GFRT variant?

  • Choose based on required insulation class, operating temperature, width to match the insulation geometry, and tension needs. For higher-temperature or higher-strength requirements, select acrylic-based adhesives with appropriate thickness and width.​

Testing standards and quality considerations

• Align product specifications with common industry standards for insulation materials and electrical tapes, including temperature classes (130°C and 155°C) and dielectric performance.

• Provide MSDS and product data sheets detailing thickness, width, adhesive type, tensile properties, dielectric strength, aging performance, and chemical resistance.

• Include compliance statements (UL, IEC, or other regional certifications) where applicable, noting that GFRTs may be UL-listed or meet IEC standards for electrical insulation materials depending on the adhesive and film certifications.