Electrical insulation material DMD prepreg
Electrical insulation material DMD prepreg is made of non-woven polyester mat bonded to both sides of an electrical grade polyester film using heat-resistant resin, and then bake to half-solidified laminate, Electrical insulation material DMD prepreg is steady thermal-bond adhesive material, and the Electrical insulation material DMD prepreg thermal class is F(155℃)
Characteristics
Good properties of mechanism and electric , and Electrical insulation material DMD prepreg applicable for the high quality, insulation system
Good flexibility, high strength of bonding with resin and substrate material
Long storage time, simple molding process
Big content of dissolve resin, high strength divesting
Little content of volatile and part discharge
Application
Electrical insulation material DMD prepreg are used as slot insulation, phase insulation, and Electrical insulation material DMD prepreg liner insulation and layer-pressure insulation of class F dry type transformer.
Storage
Electrical insulation material DMD prepreg should be put into carton after sealed with plastic pocket, of which the weight is no less than 60kg. Electrical insulation material DMD prepreg storage under the dry, well-ventilated, room temperature. Electrical insulation material DMD prepreg should be care of fire-proof, moisture-proof, compression-proof and sun-proof and sun-proof. Electrical insulation material DMD prepreg can storage more than 6 months.
Curing Conditions
| Temperature ( ℃) | 130 | 140 | 150 |
| Times(hrs) | 5 | 4 | 3 |

| NO. | Items | Unit | Index | ||||||||||||||||||
| 1 | Nominal Thickness | mm | 0.15 | 0.18 | 0.20 | 0.23 | 0.25 | 0.30 | 0.35 | 0.40 | 0.45 | ||||||||||
| 2 | Thickness Tolerance | mm | ±0.020 | ±0.025 | ±0.030 | ±0.030 | ±0.030 | ±0.030 | ±0.035 | ±0.040 | ±0.045 | ||||||||||
| 3 | Nominal Gram and Tolerance | g/square meter | 170 | 210 | 230 | 240 | 260 | 300 | 360 | 440 | 490 | ||||||||||
| ±25 | ±30 | ±35 | ±30 | ±40 | ±45 | ±50 | ±55 | ±60 | |||||||||||||
| 4 | Film Nominal Thickness | mm | 0.05 | 0.05 | 0.05 | 0.10 | 0.10 | 0.15 | 0.188 | 0.25 | 0.25 | ||||||||||
| 5 | DMD Nominal Thickness | mm | 0.10 | 0.14 | 0.15 | 0.18 | 0.20 | 0.25 | 0.30 | 0.35 | 0.40 | ||||||||||
| 6 | Tensile Strength (MD) | n/cm | ≥70 | ≥80 | ≥100 | ||||||||||||||||
| 7 | Resin Content | % | 35±5 | 30±5 | 25±5 | 20±5 | |||||||||||||||
| 8 | Volatile Content | % | ≤1.5 | ||||||||||||||||||
| 9 | Dissolvable Resin Content | % | ≥85 | ||||||||||||||||||
| 10 | Dielectric Strength | MV/m | ≥40 | ||||||||||||||||||
| 11 | Breakdown Voltage(min) | kV | 7 | 7 | 7 | 10 | 10 | 13 | 15 | 18 | 18 | ||||||||||
| 12 | Tensile And Sheared Strength | mpa | ≥3.0 | ||||||||||||||||||
| 13 | Heat Shrinkable | TD | % | ≤1.0 | Special requirements will be negotiated by both sides | ||||||||||||||||
| MD | ≤2.0 | ||||||||||||||||||||
| 14 15 | Appearance | Flexible, smooth, no delaminating, machinery damage, impurity, crack, blister and adhesive phenomenon | |||||||||||||||||||
| 16 | Supplied Size | Supplied with reel, inner diameter is 76mm, the width is from 15mm to 1100mm, can be cut to tape | |||||||||||||||||||
| 17 | Color | Red , burnt almond, white | |||||||||||||||||||
| 18 | Index of Long Time High Temperature Resistance(TI) | ℃ | ≥155 | ||||||||||||||||||
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