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Compare All Insulation Papers
| Paper Type | Grade Code | IEC Standard | Thickness Range | Max Roll Width |
|---|---|---|---|---|
| Kraft Paper | UB-IKP | IEC 60554-3-5:1984 | 0.05–0.125 mm | Upto 1250 mm |
| Press Paper | UB-IPP | IEC 60641-3-2 P2.1B | 0.125–0.5 mm | Upto 1250 mm |
| Diamond Dotted | UB-DDP | IEC 60641-3-2 P4.1A | 0.075–0.5 mm | Upto 1220 mm |
| Crepe Paper | UB-Crepe | IEC 60554-3-3:1980 | 0.075–0.125 mm | Upto 1000 mm |
| Thermally Upgraded | UB-TUP | IEC 60554-2:2001 | 0.075–0.5 mm | Upto 1500 mm |
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Insulation Kraft Paper
The standard conductor insulation paper — wound directly onto copper and aluminium conductors for winding in power and distribution transformers.
| Grade | Thickness Range | Master Roll Width (mm) | Tolerance (mm) |
|---|---|---|---|
| UB-IKP | 2 mil to 5 mil (0.05 mm to 0.125 mm) | Upto 1250 | +/- 5 |
Insulation Press Paper
A multi-layer structured insulation paper with high mechanical strength — used for heavier insulation requirements in power transformer windings.
| Grade | Thickness Range | Master Roll Width (mm) | Tolerance (mm) |
|---|---|---|---|
| UB-IPP | 5 mil to 20 mil (0.125 mm to 0.5 mm) | Upto 1250 | +/- 5 |
Diamond Dotted Paper
Epoxy resin-coated paper that bonds winding layers under heat and pressure — eliminates the need for varnish impregnation in coil assembly.
| Grade | Thickness Range | Master Roll Width (mm) | Tolerance (mm) |
|---|---|---|---|
| UB-DDP | 3 mil to 20 mil (0.075 mm to 0.5 mm) | Upto 1220 | +/- 5 |
Insulation Crepe Paper
High-elongation paper that conforms tightly to irregular surfaces — used for wrapping leads, bushings, and components requiring flexible insulation.
| Grade | Thickness Range | Master Roll Width (mm) | Tolerance (mm) |
|---|---|---|---|
| UB-Crepe | 3 mil to 5 mil (0.075 mm to 0.125 mm) | Upto 1000 | +/- 5 |
Thermally Upgraded Paper
Chemically treated paper engineered for extended transformer life — delivers superior thermal stability at 120°C class and significantly slower ageing than standard kraft.
| Grade | Thickness Range | Master Roll Width (mm) | Tolerance (mm) |
|---|---|---|---|
| UB-TUP | 3 mil to 20 mil (0.075 mm to 0.5 mm) | Upto 1500 | +/- 5 |
| UB-TUP(C) | 3 mil to 5 mil (0.075 mm to 0.125 mm) | Upto 1000 | +/- 5 |
| UB-TUP(DDP) | 3 mil to 20 mil (0.075 mm to 0.5 mm) | Upto 1450 | +/- 5 |
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