Our F Class Epoxy Prepreg DMD is made by impregnating polyester film and polyester fiber non-woven fabric (DMD) with heat-resistant modified epoxy resin, followed by baking. It can be further cured during use and is a reliable thermally adhesive material with a heat resistance rating of F-grade (155°C). This Dry-type Transformer Insulation material combines the excellent electrical properties of polyester film with the mechanical strength of polyester fiber non-woven fabric, while the epoxy resin impregnation provides good heat resistance and insulation properties. It is widely used in F-grade dry-type transformer coil interlayer insulation, end-sealing insulation, motor coil insulation, and wound laminated tubes, among other applications.
1. High mechanical strength and excellent electrical properties, suitable for high-strength insulation systems.
2. Good flexibility, strong adhesion between the resin and DMD substrate, no powder shedding, and no discoloration.
3. Long storage life and simple forming process.
4. High soluble resin content, ensuring the product tightly bonds with metal conductors after curing, with exceptional peel strength.
5. Low volatile content, ensuring excellent partial discharge performance of the product.
6. Outstanding heat resistance, capable of withstanding high temperatures, suitable for F-grade insulation systems (maximum operating temperature of 155°C)
| Item | Unit | Requirement | ||||||
| Nominal thickness | mm | 0.18 | 0.2 | 0.23 | 0.25 | 0.3 | 0.4 | |
| Thickness tolerance | mm | ±0.02 | ±0.03 | ±0.04 | ||||
| Grammage | g/m2 | 200±20 | 240±28 | 250±37 | 290±45 | 380±53 | 460±54 | |
| Tensile strength | MD no bending | N/10mm | ≥80 | ≥120 | ||||
| Breakdown voltage | KV | ≥8 | ≥10 | |||||
| Soluble resin content | g/m2 | ≥45 | ||||||
| Volatile content | % | ≤1.5 | ||||||
| Tensile shear strength | Mpa | ≥5 | ||||||
| Temperature index(TI) | – | ≥155 | ||||||
* Interlayer insulation for low-voltage coils of dry-type transformers: Serves as an interlayer insulation material, effectively isolating coils with different voltage levels, preventing electrical breakdown, and enhancing safety.
* Slot and phase insulation for F-grade motors: Used for slot and phase insulation in motors, improving insulation performance and operational reliability while extending equipment lifespan.
* Insulation for other electrical equipment: Suitable for other electrical equipment requiring high insulation performance, such as capacitors, voltage regulators, and high-voltage devices.
* Base material for wound laminated tubes: Used in the production of wound laminated tubes, providing high mechanical strength and excellent heat resistance, ideal for specialized electrical structural applications.
GBS Die Cut, as adhesive tape supplier, focuses on the research & development, production and sales of various types of adhesive tapes for different industries and has been authorized as golden distributor of many noted brands for so many years, such as Nomex, Formex, Rogers Poron, 3M, Tesa, and so forth.
In today’s world, where efficiency, safety, and aesthetics are highly valued, floor marking tapes play a vital role in floor protection and guidance. Among these, 3M 471 Floor Tape stands
In various industries, masking tape is a vital auxiliary material used widely in automotive manufacturing, electronics production, aerospace, construction, and interior decoration. Among the many masking tapes available, green polyester
For inquiries about our products or price list, pls leave your email to us and we will be in touch within 24 hours.
