Thermally Upgraded Nitrogen Diamond Dotted Paper For Transformer

Thermally Upgraded Nitrogen Diamond Dotted Paper For Transformer

Heat resistant(Thermally upgraded) diamond dotted paper is a resin-coated electrical insulation paper used for transformer winding insulation. It combines the functions of interlayer insulation and bonding support in one material, helping improve winding stability during coil manufacturing and drying.

This product is mainly used in:

• oil-filled transformers

• distribution transformers

• power transformers

• dry-type transformer coils

Compared with ordinary dotted paper, heat resistant diamond dotted paper is selected when the transformer design requires better thermal aging resistance, stronger winding stability and more reliable long-term insulation performance. 
Chengrui Insulation supplies heat resistant diamond dotted paper for transformer manufacturers, winding workshops, insulation material converters and industrial distributors. We support supply in rolls, slit rolls and cut sheets based on winding width, coil structure and production requirements

What Is Thermally Upgraded Diamond Dotted Paper?

Thermally upgraded diamond dotted paper is made by coating insulation paper with B-stage epoxy resin dots in a regular diamond pattern.

During transformer winding and heat treatment, these resin dots soften and bond adjacent winding layers together. This helps the coil maintain a more stable structure after drying and improves resistance to movement during handling and service.

The paper is described as heat resistant because the base insulation paper is designed for better thermal endurance than ordinary kraft-based dotted paper. In practical terms, this means the material is more suitable for transformer projects where thermal aging performance is a key concern.

Main Functions in Transformer Windings

In transformer production, this material is mainly used for the following purposes:

1. Interlayer Insulation

It provides electrical insulation between winding layers.

2. Winding Bonding

The resin dots help bond the coil layers during heating, which improves coil integrity.

3. Coil Stability

After curing, the winding becomes more compact and stable, which helps reduce displacement during handling, assembly and operation.

4. Improved Thermal Endurance

The heat resistant paper base is selected for applications where standard dotted paper may not provide enough thermal margin.

Why Transformer Manufacturers Choose Heat Resistant Diamond Dotted Paper

For transformer manufacturers, the value of this product is practical rather than theoretical.

It is usually selected when the customer needs:

dotted paper with better heat resistance

more stable winding structure

reliable bonding between winding layers

improved thermal aging performance

insulation paper suitable for long-term transformer service

In many transformer projects, the concern is not only whether the paper can insulate. The concern is whether the winding can remain stable after drying and during service life. That is where heat resistant diamond dotted paper offers an advantage.

Typical Applications

Heat resistant diamond dotted paper is commonly used for:

• interlayer insulation in transformer windings

• bonding insulation in distribution transformer coils

• winding insulation in oil-filled transformers

• coil bonding in dry-type transformers

• electrical insulation structures requiring improved thermal endurance

This product is especially suitable for customers who want a bonding insulation paper with stronger heat resistance than ordinary diamond dotted paper.

FAQ

Q1: What is heat resistant diamond dotted paper used for?

A: It is mainly used for interlayer insulation and bonding in transformer windings.

Q2: Why is it called heat resistant diamond dotted paper?

A: Because the paper base is designed for better thermal aging resistance than ordinary dotted paper, while the resin dots provide bonding during heating.

Q3: What is the function of the resin dots?

A: The resin dots soften during heating and bond adjacent winding layers together.

Q4: Is this product suitable for oil-filled transformers?

A: Yes. It is widely used in oil-filled transformer winding insulation structures.

Heat resistant diamond dotted paper is a practical transformer insulation material that combines:

• interlayer insulation

• resin bonding

• winding stability

• improved thermal aging resistance

For transformer manufacturers, the main value of this product is clear: it helps produce a more stable coil structure while also providing better thermal endurance than ordinary dotted paper.

If the project requires bonding insulation paper with improved heat resistance, this product is a practical option to evaluate.