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Standard: IEC 60641-3-2:2007,JB/T10442.3-2017
Regular Width: 1000-1330mm( supports customized cutting.)
Thickness: 0.05mm,0.08mm,0.13mm,0.18mm,0.25mm,0.075mm,0.125mm
Rool diameter: 250~300mm
Weight of each roll: 45~60Kg
Certificate: UL,RoHS,MSDS,CEMT,Factory inspection Report
Application: oil-immersed transformers, Wire wrap insulation, Current & instrument transformers
Diamond Dotted Paper is made of insulation paper coated with modified special epoxy resin in a diamond shape. The adhesive strength of the epoxy resin is enough to prevent the displacement of each layer of the winding during short circuit, thereby ensuring the long-term mechanical and physical properties of insulation structure.
Excellent Bonding Performance: The resin melts and cures during heating, forming a solid winding structure and improving short-circuit resistance
Good Electrical Insulation Properties: High dielectric strength with stable electrical performance
Enhanced Mechanical Strength: Improves winding stability and vibration resistance
Good Oil Compatibility: Fully compatible with transformer oil without affecting insulation performance
Easy Processing: Suitable for automatic winding processes, improving production efficiency
Thermal Class
Standard: Class A (105°C)
Customizable: Class E (120°C) / Class B (130°C) / Class F (155°C)
Oil-Immersed Transformers: Used for interlayer insulation and bonding of windings
Distribution Transformers: Enhances coil integrity and short-circuit resistance
Reactors and Motors: Used for coil insulation and structural reinforcement
1.Factory: We operate a professional electrical insulation materials manufacturing facility and are ISO-certified.
2.Fully Automated Production: Our advanced automated workshop is supported by a strict and comprehensive quality management system.
3.Quality Inspection: Equipped with four major laboratories and five core product performance testing capabilities.
4.Processing Services: We provide customized processing solutions based on your requirements, ensuring high quality and on-time delivery.
5.Product Certification: Our products comply with UL, SGS, RoHS, and REACH standards. Sample testing is available upon request.
6.Ready Stock Supply: Standard products can be delivered within 7–15 days.
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 | Diamond dotted paper | ||||
| SECTIONI-MAIN CHARACTERISTICS | ||||||
| Thickness | mm | 0.08 | 0.13 | 0.18 | 0.25 | |
| Tolerance | % | ±10 | ±10 | ±10 | ±10 | |
| Density | g/cm³ | 0.90-1.02 | ||||
| Oil absorption | % | ≥20 | ||||
| Moisture content | % | 4~8 | ||||
| Single-sided adhesive thickness | μm | 6-12 | ||||
| Ash content | % | ≤0.8 | ||||
| pH of aqueous extract | – | 6.5-8.5 | ||||
| SECTIONII-MECHANICAL CHARACTERISTICS | ||||||
| Tensile strength | MD | N/mm² | ≥70 | |||
| CMD | ≥35 | |||||
| Bonding strength | Room temperature | kPa | ≥650 | |||
| 100℃±2℃ | ≥450 | |||||
| Elongation | MD | % | ≥2.0 | |||
| CMD | ≥4.0 | |||||
| Tearing resistance | CMD | mN | ≥510 | ≥1700 | ≥2800 | ≥4200 |
| SECTIONⅢ-ELECTRICAL DATA | ||||||
| Breakdown voltage | ln air | kV | ≥0.7 | ≥1.1 | ≥1.6 | ≥2.1 |
| In oil | ≥4 | ≥7 | ≥9 | ≥11 | ||
| Conductivity of the aqueous extract | mS/m | ≤8.0 | ||||
