6641 F-CLASS DMD Insulating composite paper
As a Class F insulating material (long-term operating temperature of 155°C), 6641 DMD excels in high-temperature environments. Its core layer uses a high-melting-point polyester film (e.g., 6020 electrical insulation polyester film), combined with Class F adhesive, which remains intact (no delamination or blistering) for 10 minutes at 180±2°C. This heat resistance makes it suitable for high-load motors, dry-type transformers, and other equipment, maintaining stable performance even during short-term overloads (e.g., 200°C).
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Composite insulation paper
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Product Technical Parameters:
| Serial Number | Indicator Name | Units | Indicator value | |||||||||
| 1 | Nominal thickness | ㎜ | 0.15 | 0.18 | 0.2 | 0.23 | 0.25 | 0.3 | 0.35 | 0.4 | ||
| 2 | Allowable deviation of thickness | ㎜ | ±0.020 | ±0.025 | ±0.030 | ±0.030 | ±0.030 | ±0.035 | ±0.040 | ±0.040 | ||
| 3 | Quantitative | g/㎡ | 150±22 | 190±28 | 210±32 | 240±36 | 260±39 | 310±46 | 390±58 | 440±66 | ||
| 4 | Tensile strength≥ | Lengthways | Before bending | N/10mm | 80 | 100 | 120 | 130 | 150 | 170 | 200 | 300 |
| After bending | 80 | 90 | 105 | 115 | 130 | 150 | 180 | 220 | ||||
| Transverse | Before bending | 80 | 90 | 105 | 115 | 130 | 150 | 180 | 220 | |||
| After bending | 70 | 80 | 95 | 100 | 120 | 130 | 160 | 200 | ||||
| 5 | Strain elongation≥ | Lengthways | ％ | 10 | 5 | |||||||
| Transverse | 15 | 5 | ||||||||||
| 6 | Breakdown voltage≥ | Normal state | ㎸ | 7 | 8 | 9 | 10 | 11 | 13 | 15 | 18 | |
| 150℃±2℃ | 6 | 7 | 8 | 9 | 10 | 12 | 14 | 17 | ||||
| 7 | Tensile strength≥ | Lengthways | N | 10 | 15 | 20 | ||||||
| 8 | Transverse | 15 | 20 | 30 | ||||||||
| 9 | Normal adhesiveness | － | No stratification, no bubbles or other defects | |||||||||
| 10 | Hot-state adhesion（200℃±2℃/10min） | － | No stratification, no foaming, no glue bleeding | |||||||||
| 11 | Adhesion after getting damp | － | No stratification | |||||||||
| 12 | Temperature index | － | ≥155 | |||||||||
Product quality standards:
Six Key Product Advantages of 6641 F-CLASS DMD Insulating Composite Paper：
1. Outstanding High-Temperature Resistance
- Three-layer composite structure: The outer polyester fiber non-woven fabric (D) provides excellent tear and abrasion resistance, while the middle polyester film (M) enhances rigidity. For example, its longitudinal tensile strength reaches 80–370N/cm, and transverse tensile strength 70–350N/cm, retaining over 80% of its strength after bending.
- Good process adaptability: The material’s flexibility allows it to fit complex insulating shapes (e.g., bending and winding for motor slot insulation) while maintaining dimensional stability.
3. Excellent Electrical Insulation Performance
- High breakdown voltage: With a thickness of 0.15–0.40mm, 6641 DMD achieves a breakdown voltage of 6–22kV, meeting the inter-turn and interlayer insulation requirements for Class F motors.
- Low dielectric loss: Dielectric loss tangent (tanδ) ≤ 0.005, minimizing energy loss and improving equipment efficiency.
- Stable insulation resistance: Maintains high insulation resistance under normal conditions and reliable performance in wet or oily environments.
4. Strong Chemical Corrosion Resistance and Environmental Adaptability
- Oil and solvent resistance: The outer non-woven fabric absorbs impregnating resin and resists erosion from oils, acids, alkalis, and other chemicals, suitable for harsh environments like chemical and metallurgical industries.
- Moisture and mold resistance: Dense structure effectively blocks moisture penetration, preventing insulation degradation caused by humidity.
5. Environmental Compliance and Certifications
- International standard compliance: Certified by UL (OBJS2-B class insulation system) and compliant with the RoHS directive, being lead-free, nickel-free, and cadmium-free to meet EU environmental requirements.
- Halogen-free formulation: Uses halogen-free adhesives, releasing no harmful gases when burned, aligning with green manufacturing trends.
6. Wide Range of Applications
- Motor applications: Serves as 定型绝缘材料 (shaped insulating material) for Y-series motors, used in slot insulation, phase insulation, and gasket insulation to enhance reliability and service life.
- Transformer applications: Suitable for interlayer insulation and end-sealing insulation in dry-type transformers, withstanding high-frequency electric fields and temperature fluctuations.
- Other electrical equipment: Provides reliable insulation for reactors, instrument transformers, and more.
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Since its establishment, Jingwei has always been committed to the field of electrical insulation materials. With excellent quality, innovative technology and professional services, it provides efficient and reliable insulation solutions to global customers, and has won the trust and praise of global customers.
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Since its establishment, Jingwei has always been committed to the field of electrical insulation materials. With excellent quality, innovative technology and professional services, it provides efficient and reliable insulation solutions to global customers, and has won the trust and praise of global customers.
6641 F-CLASS DMD Insulating composite paper
As a Class F insulating material (long-term operating temperature of 155°C), 6641 DMD excels in high-temperature environments. Its core layer uses a high-melting-point polyester film (e.g., 6020 electrical insulation polyester film), combined with Class F adhesive, which remains intact (no delamination or blistering) for 10 minutes at 180±2°C. This heat resistance makes it suitable for high-load motors, dry-type transformers, and other equipment, maintaining stable performance even during short-term overloads (e.g., 200°C).
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