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Name:Transformer Pressboard（Presspaper)
Standard: IEC 60641-3-1:2008 GB/T19264.3-2003
Regular Size: 1000*2000mm/1400*2100mm/2100*4200
Thickness: 0.5-5mm
Thermal rating: Class A(105℃)
Color: natural
Application: oil-immersed transformers,Capacitor,Electrical industry
Electrical paper pressboard is made of 100% high purity sulphate wood pulp by hot pressing. Due to its good compatibity and good mechanical strength, it is widely used for transformer layer insulation and coil winding, and it is also a base material for HV molded compenents.
Excellent insulation performance, agingresistance and mechanical properties
High electrical strength and low shrinkage
High density and flatness
Good compatibility with liquid dielectrics
Transformer Components: Used as internal insulation in oil-immersed power transformers to create spacers, blocks, insulation cylinders, barriers, and end rings.
Motors and Reactors: Acts as insulation support for rotating machines, inductors, and UHV (Ultra-High Voltage) transmission equipment.
Our company is certified to ISO 9001, ISO 14001, and ISO 45001 management systems. Our products also comply with international certifications and reports including UL, RoHS, REACH, MSDS, CEMT, as well as factory inspection and test reports provided before shipment.
| Product name | Unit | Pressboard (10kV) Pressboard (35kV) | ||||||||||
| SECTIONI-MAIN CHARACTERISTICS | ||||||||||||
| Thickness | mm | 0.8 | 1.0 | 2.0 | 3.0 | 4.0 | 0.8 | 1.0 | 2.0 | 3.0 | 4.0 | |
| Density | g/cm³ | 0.90- 1.15 | 0.95- 1.15 | 1.0-1.2 | 1.0-1.2 | 1.0-1.2 | 0.95- 1.15 | 0.95- 1.15 | 1.0-1.2 | 1.0-1.2 | 1.0-1.2 | |
| Water content | % | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | |
| pH of aqueous extract | N/A | 6.0-9.0 | 6.0-9.0 | |||||||||
| oil absorption | % | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | ≥15 | |
| Ash content | % | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | |
| Colour | Natural | |||||||||||
| SECTIONIⅡ-MECHANICAL CHARACTERISTICS | ||||||||||||
| Tensile strength | MD | MPa | ≥50 | ≥50 | ≥55 | ≥55 | ≥55 | ≥55 | ≥55 | ≥60 | ≥60 | ≥60 |
| CMD | ≥30 | ≥30 | ≥35 | ≥35 | ≥35 | ≥35 | ≥35 | ≥40 | ≥40 | ≥40 | ||
| Elongation | MD | % | ≥3.0 | ≥3.0 | ≥3.0 | ≥3.0 | ≥3.0 | ≥3.0 | ≥3.0 | ≥3.0 | ≥3.0 | ≥3.0 |
| CMD | ≥4.0 | ≥4.0 | ≥4.0 | ≥4.0 | ≥4.0 | ≥4.0 | ≥4.0 | ≥4.0 | ≥4.0 | ≥4.0 | ||
| Shrinkability | MD | % | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 | ≤0.7 |
| CMD | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ≤1.0 | ||
| TD | ≤7.0 | ≤5.0 | ≤5.0 | ≤5.0 | ≤5.0 | ≤5.0 | ≤5.0 | ≤5.0 | ≤5.0 | ≤5.0 | ||
| SECTIONⅢ-ELECTRICAL DATA | ||||||||||||
| Electric strength | In air | kV/mm | ≥9.0 | ≥10.0 | ≥11.0 | ≥11.0 | ≥11.0 | ≥10.0 | ≥10.0 | ≥11.0 | ≥11.0 | ≥11.0 |
| Electric strength | In oil(90℃) | kV | ≥30 | ≥35 | ≥40 | ≥40 | ≥40 | ≥35 | ≥35 | ≥40 | ≥40 | ≥40 |
| Conductivity of the aqueous extract | mS/m | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | ≤8.0 | |
