Our Diamond-Dotted DMD Paper (also known as Diamond-Dotted DMD Insulation Paper) is composed of polyester film and polyester fiber non-woven fabric, bonded with F-grade heat-resistant adhesive (continuous operating temperature up to 155°C). Its surface is coated with diamond-patterned specially modified epoxy resin and undergoes B-stage curing, providing excellent mechanical strength, dielectric properties, adhesion, and heat resistance. Available in thicknesses of 0.10mm, 0.16mm, 0.20mm, 0.25mm, 0.40mm, and 0.50mm, it comes in standard widths of 1000±2mm, 25±2mm, and 50±2mm. This material is primarily used for layer insulation, turn insulation, and end insulation in oil-immersed high-overload transformers, as well as for wrapping copper and aluminum flat wires, ensuring long-term stable performance.
1.Excellent Mechanical Strength: Withstands high mechanical stress without damage, ensuring stability.
2.Good Dielectric Properties: Offers high insulation resistance and breakdown voltage, ensuring the safe operation of electrical equipment.
3.Superior Adhesion: The coating melts at a certain temperature to create adhesion and cures as the temperature rises, bonding adjacent winding layers into a stable unit.
4.Outstanding Heat Resistance: Rated F-class, maintaining reliable insulation performance even under high temperatures.
5.Versatile Processing Options: Available for slitting, slicing, and die-cutting to meet various application needs.
| Index name | Unit | Index value | |||||||||
| Substrate thickness | mm | 0.1 | 0.13 | 0.15 | 0.17 | 0.2 | 0.25 | 0.3 | |||
| Thickness limit deviation | mm | ±0.02 | ±0.03 | ||||||||
| Single-sided adhesive thickness | μm | 5～15 | |||||||||
| Contamination of transformer oil | / | No pollution(△tans<0.001) | |||||||||
| Tensile strength No bending | Vertical | N/10mm | 60 | 90 | ≥100 | ≥120 | ≥140 | ≥190 | ≥270 | ||
| Horizontal | 50 | 80 | ≥90 | ≥105 | ≥120 | ≥170 | ≥200 | ||||
| Elongation at break | Vertical | % | ≥15 | 5 | |||||||
| Horizontal | ≥20 | 5 | |||||||||
| Breakdown voltage, normal | kV | 4 | 5 | 6 | 7 | 9 | 12 | 15 | |||
| Long term heat resistance | / | ≥155 | |||||||||
| Curing conditions | Low temperature 90±5℃, 2h; then high temperature 140±5℃, ≥4h | ||||||||||
| Bond strength | kPa | ≥350 | |||||||||
* For Oil-Immersed Power Transformers: Used as interlayer, turn, and end insulation to enhance dielectric strength and ensure long-term stable operation.
* For Motor Windings: Provides reliable insulation to prevent short circuits between windings, improving motor efficiency and lifespan.
* As a Corona-Resistant Material: Improves electric field distribution in high-voltage equipment, reducing partial discharge and energy loss.
* For Cable Insulation and Shielding: Serves as an isolation layer to prevent electromagnetic interference, enhancing signal stability and system reliability.
* For Electronic Devices: Used in circuit board insulation and protection to ensure proper operation and prevent electrical interference and short circuits.
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.
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