Electrical Laminated Wood is a high-strength insulating composite manufactured from selected birch, stained wood, and ash veneers impregnated with specialized insulating resin and hot-pressed under controlled temperature and pressure to achieve uniform density and dimensional stability. It provides excellent mechanical strength, good electrical insulation performance, and high compatibility with transformer oil, enabling reliable long-term operation in oil-immersed environments up to 105℃.
With lower weight and cost compared to steel and other laminate materials, Electrical Laminated Wood is widely used in power and instrument transformers for pressure plates, spacer blocks, support elements, and clamping components, and serves as an effective replacement for steel plates, insulating paper laminates, epoxy paper boards, and woven glass fabric laminates.
Electrical laminated wood
KP20222
150℃
F
beech veneers, phenol-formaldehyde resin
8~120mm
0.9~1.3g/cm³
1000 x 1500, 2000 x 1000, 1200 x 2200, 2400 x 1200, 1500 x 3000
Outstanding Insulation Performance
Excellent Heat Resistance
High Strength & Pressure Resistance
● As part of oil-filled transformer, such as upper and lower pressure plate.
● Lead bracket and iron yoke cushion block.
● Clamping device in mutual inductor.
| No. | Index Name | Unit | Index | |||
|---|---|---|---|---|---|---|
| 1 | Thickness | mm | ≤1.6 | >1.6-3.0 | >3.0-6.0 | |
| 2 | Thickness Deviation | % | ±7.5 | ±5.0 | ±5.0 | |
| 3 | Performance Density | g/cm3 | 1.0-1.2 | 1.1-1.12 | 1.15-1.3 | |
| 4 | Tensile Strength (Portrait) | MPa | ≥100 | ≥105 | ≥110 | |
| 5 | Tensile Strength (Transverse) | MPa | ≥75 | ≥80 | ≥85 | |
| 6 | Elongation | Portrait | % | ≥3.0 | ≥3.0 | ≥3.0 |
| Transverse | ≥4.0 | ≥4.0 | ≥4.0 | |||
| 7 | Compressibility | % | ≤10.0 | ≤7.5 | ≤5.0 | |
| 8 | Shrinkage | Portrait | % | ≤0.5 | ≤0.5 | ≤0.5 |
| Transverse | ≤0.7 | 0.7 | ≤0.7 | |||
| Thickness Direction | ≤0.5 | ≤0.5 | ≤0.5 | |||
| 9 | Interlaminar Bonding | Check whether one or more layers of stripping surface rupture obviously rough or scared |
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| 10 | Water Content | % | ≤6.0 | ≤6.0 | ≤6.0 | |
| 11 | Ash Content | % | ≤1.0 | ≤1.0 | ≤1.0 | |
| 12 | Water Extraction Conductivity | Ms/m | ≤5.0 | ≤6.0 | ≤8.0 | |
| 13 | Ph Of Aqueous Extract | / | 6.0-9.0 | 6.0-9.0 | 6.0-9.0 | |
| 14 | Oil Absorption | % | ≥11.0 | ≥9.0 | ≥7.0 | |
| No. | Property | Unit | Model | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Veneers technique target | Rings technique target | ||||||||||
| P3B | C1B | C2B | C3B | C4B | T2B | T4B | |||||
| 1 | Density | g/cm3 | 1.1-1.2 | 0.7-0.9 | 0.9-1.1 | 1.1-1.2 | 1.2-1.3 | 0.9-1.1 | 1.2-1.3 | ||
| 2 | Moisture | % | ≤6 | ≤6 | ≤6 | ≤6 | ≤6 | ≤6 | ≤6 | ||
| 3 | Vertical Layer Direction Flexural Strength | Direction A | Mpa | ≥150 | ≥45 | ≥55 | ≥65 | ≥80 | Diameter>1000mm | ≥100 | ≥140 |
| 4 | Direction B | Diameter≤1000mm | ≥90 | ≥125 | |||||||
| 5 | Vertical Layer Direction Flexural Modulus of elasticity | Direction A | Gpa | ≥14 | ≥4.5 | ≥6 | ≥80 | ≥9 | ≥10 | ≥13 | |
| Direction B | - | ||||||||||
| 6 | Compressibility (Below 20Mpa) | C | % | ≤3 | ≤5 | ≤4 | ≤3 | ≤2.5 | ≤5 | ≤4 | |
| Crev | ≥70 | ≥70 | ≥70 | ≥70 | ≥70 | ≥70 | ≥70 | ||||
| 7 | Impact Strength (Side Test) | Direction A | KJ/m2 | ≥35 | ≥6 | ≥10 | ≥13 | ≥15 | ≥25 | ≥35 | |
| Direction B | - | ||||||||||
| 11 | Shear Strength | Mpa | ≥8 | ≥5 | ≥7 | ≥8 | ≥9 | ≥7 | ≥9 | ||
| 12 | Vertical Layer Direction Eletric Strength | KV/mm | ≥11 | ≥9 | ≥10 | ≥11 | ≥12 | ≥10 | ≥10 | ||
| 13 | Parallel Layer Direction Puncture Voltage | KV | ≥50 | ≥50 | ≥50 | ≥50 | ≥50 | ≥50 | ≥50 | ||
| 14 | Shrinkage after drying | Direction A | % | ≤0.2 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.3 | Girth | ≤0.5 | ≤0.5 ≤3 |
| Direction B | ≤0.5 | ≤0.3 | ≤0.3 | ≤0.3 | ≤0.3 | Thickness | ≤3 | ||||
| Thickness | ≤3 | ≤3 | ≤3 | ≤3 | ≤3 | ||||||
| 15 | Oil Absorption | % | ≥8 | ≥20 | ≥15 | ≥8 | ≥5 | ≥15 | ≥5 | ||
| 16 | Contaimination to Liqid Dielectric | - | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ≤0.1 | ||
Yes, based on drawings or samples.
UL, RoHS, REACH, CE, ISO, etc.
Usually 100 kg or 100 sheets, negotiable.
Yes, common samples free, buyer pays freight.
2-4 weeks after payment.
Yes, including labeling and packaging.
Yes, over 20 years.
T/T 30% deposit, 70% before shipment. Negotiable if supports needed.
Yes, we offer CNC machining.
Manufacturer and Exporter
No.3, Mianzhi Street, Zhucheng, Shandong, China
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