| 1、Products Summarize：
The products are made of electrical alkali-free fiber cloth,impregnated with epoxy-phenolic resin,by processing under backing and heating.
3240 Epoxy-phenolic Glass Cloth Laminated Sheets have high mechanical,heat resistance and dielectric properties.it is suitable for insulation structure parts in motor and electric apparatus.and it is also used in transformer oil and humid environment. 2、Technique Request：
1. Appearance:surface should be neat and smooth,disallowing to have impurity and other obvious defect,allowing to have slight scoring,the edge should incised tidy,edge faces have no delamination and crack.
2. Width and length >450-980mm,allowed tolerance ±15mm
3. Nominal thickness and tolerance in chart 1 Chart 1 nominal thickness and tolerance mm be separated
| Nominal Thickness | Allowed Deviation | Nominal Thickness | Allowed Deviation | Nominal Thickness | Allowed Deviation | | 0.2 0.3 | ±0.07 | 5.0 5.5 | ±0.48 | 21-30（Apart 1） | ±1.50 | | 0.5 0.8 | ±0.14 | 6.0 6.5 | ±0.58 | 32-40（Apart 2） | ±2.00 | | 1.0 1.2 1.5 | ±0.22 | 7.0 8.0 | ±0.68 | 42-50（Apart 2） | ±2.20 | | 1.8 2.0 | ±0.28 | 9.0 10.0 | ±0.80 | 52-60（Apart 2） | ±2.50 | | 2.5 3.0 3.5 | ±0.33 | 11-15（Apart 1） | ±1.00 | 65-80（Apart 5） | ±2.80 | | 4.0 4.5 | ±0.38 | 16-20（Apart 1） | ±1.30 | | | 4. Disallowing crack and dregs falling after machining.
5. Setback in chart 2 Chart 2 Setback mm | Nominal Thickness | Setback no higher than | | 5.0-7.0 | 10 | | 8.0-15 | 7 | | 16-30 | 3 | 6. Physics ,mechanical and dielectric properties in chart 3 Chart 3 physics ,mechanical and dielectric properties | S.N | Item Name | unit | index Value | | 1 | Density | g/cm3 | 1.70-1.90 | | 2 | Martens Temperature（length wise direction） | ℃ | ≥200 | | 3 | | Bending Strength： | length wise direction | | | cross wise direction | | Mpa | ≥392
≥294 | | 4 | | Tensile Strength： | length wise direction | | | cross wise direction | | Mpa | ≥343
≥245 | | 5 | Bond Strength | N | ≥5684 | | 6 | | Impact Resistant Strength： | length wise direction | | | cross wise direction | | KJ/m2 | ≥150
≥100 | | 7 | | Surface Resistance： | Normal | | | Soaking | | MΩ | ≥1.0×107
≥1.0×105 | | 8 | | Volume Resistance： | Normal | | | Soaking | | MΩ·m | ≥1.0×105
≥1.0×103 | | 9 | | Parallel layer direction insulation： | Normal | | | Soaking | | MΩ | ≥1.0×104
≥1.0×102 | | 10 | Dissipation Factor 50HZ | | ≤0.050 | | 11 | Uprightness layer direction dielectric strength
in 90±2℃ transformer oil | | Sheets Thickness0.5-1mm | | Sheets Thickness1.1-2mm | | Sheets Thickness2.1-3mm | | Sheets Thickness3mm以上 | | by way of one surface processed | | MV/m | | | 12 | Parallel Withstand Voltage in 90±2℃ transformer oil | KV | ≥30.0 | 3、Storage period：
18 months from leaving factory | 
