Diamond Dotted Paper (Electrical Grade DDP for Transformer Insulation)

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Diamond Dotted Paper(Electrical Grade Diamond Dotted Paper)

Diamond dotted paper (DDP) is a specialized electrical insulation material widely used in transformer insulation systems known for its superior bonding strength and dielectric performance, it plays a critical role in modern transformer insulation systems. ACC Insulations manufactures premium diamond dotted paper designed to meet the stringent requirements of transformer manufacturers.

What Is Diamond Dotted Paper?

Diamond Dotted Paper (DDP) is a high-performance electrical insulation material used in power and distribution transformers for winding insulation and layer bonding. Manufactured using electrical grade kraft paper coated with B-stage epoxy resin in a diamond pattern, DDP provides superior dielectric strength, thermal stability, oil compatibility and mechanical reinforcement in transformer insulation systems.

Description
Usage/Application Transformer
Class Diamond Dotted Paper with diamond-shaped epoxy resin dotted
Thickness In mm, 0.12+-0.007, or 0.17+-0.01
Colour Brown Diamond Shap

Features

  • Electrical insulation
  • Enhanced mechanical strength
  • Improved drying process
  • Reduced partial discharge risk
  • Facilitates oil impregnation

Key Characteristics

  • Excellent dielectric strength
  • Strong bonding capability
  • High thermal resistance
  • Oil compatibility
  • Mechanical stability

Applications

Diamond dotted paper is commonly used for:

  • Transformer winding insulation
  • Layer bonding
  • Coil insulation
  • High-voltage transformer applications

Why Diamond Dotted Paper Is Important

DDP improves transformer performance by:

  • Preventing winding movement
  • Enhancing mechanical strength
  • Improving thermal endurance
  • Reducing insulation failure risk

Manufacturing Process

ACC Insulations uses advanced coating and curing processes to ensure:

  • Uniform resin distribution
  • Strong adhesive properties
  • Consistent performance

Technical Specifications

  • Base Paper: Electrical Grade Kraft Paper
  • Resin Type: B-Stage Epoxy Resin
  • Thermal Class: Class F / Class H (based on application)
  • Thickness Range: 0.12 ± 0.007 mm / 0.17 ± 0.01 mm
  • Bonding Temperature: As per transformer curing cycle
  • Oil Compatibility: Suitable for oil-filled transformers

Quality Assurance

Each batch undergoes:

  • Dielectric testing
  • Bond strength testing
  • Thermal endurance testing

Advantages of ACC Insulations DDP

  • Reliable bonding
  • Consistent coating
  • Custom sizes
  • High-quality raw materials

Industries Served

  • Power transformer manufacturing
  • Distribution transformers
  • Electrical equipment manufacturers

Related Insulation Products

Conclusion

Diamond dotted paper is essential for modern transformer insulation systems. ACC Insulations offers high-performance DDP that enhances transformer reliability and service life.

FAQs

Yes, it is designed for oil-filled transformers.

Yes, custom dimensions are available.

Properly stored material has a long shelf life.

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