Diamond Dotted Paper

Diamond dotted insulation paper is made of electrical insulating paper coated with heat curable epoxy resin.

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Diamond Dotted Paper (DDP) | Electrical Insulation Bonding Paper

Diamond Dotted Paper (DDP) is a specialized electrical insulation paper coated with thermosetting epoxy adhesive dots arranged in a diamond pattern on one side. It is widely used in transformers, motors, and coils to provide both electrical insulation and bonding strength during the heating process.

When subjected to heat, the adhesive dots melt and bond the insulation layers together, forming a strong, unified structure that improves mechanical stability, vibration resistance, and insulation reliability. DDP is highly compatible with insulating oils and maintains excellent performance under thermal and electrical stress.

Diamond dotted paper is commonly used for interlayer insulation in transformers and winding insulation in electrical equipment, ensuring long-term durability and performance.

Key Features

• Excellent electrical insulation performance
• Strong adhesion after heat curing
• Improves coil rigidity and mechanical strength
• Good oil compatibility
• High thermal stability
• Easy to handle and process

Product Details

Diamond Dotted Paper (DDP)

Parameter	Details
Product Name	Diamond Dotted Paper (DDP)
Base Material	Electrical Insulation Kraft Paper
Coating	Epoxy Adhesive (Diamond Pattern)
Application	Transformer and motor winding insulation
Thermal Class	Class B / F (as per adhesive type)
Bonding Property	Heat-activated bonding
Oil Compatibility	Excellent (transformer oil compatible)
Thickness Range	0.05 mm – 0.5 mm (customizable)
Form	Rolls / Sheets
Color	Natural Brown
Key Function	Insulation + bonding of winding layers
End Use Industries	Transformers, motors, electrical equipment