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ABOUT US

Chengrui Factory1

Electrical insulation materials for motor & transformers

Since 2010, Chengrui has been dedicated to supplying electrical insulation materials for the global transformer and motor industries.

From insulation paper and insulation film to laminated sheets and customized insulation components, we provide practical insulation solutions that help manufacturers improve product reliability and simplify purchasing.

With years of export experience and a strong manufacturing network, Chengrui supports customers in more than 50 countries in Southeast Asia, South Asia, the Middle East, South America with stable quality, flexible production and efficient delivery.

Our mission is simple: to make sourcing electrical insulation materials easier, more reliable and more cost-effective for customers worldwide.


2010
Founded in
3000+
Sqm Factory
30+
Business Partners
10+
Compliance Documents

Electrical Insulation Materials

Supplying insulation materials for global motor and transformer manufacturers.

Diamond Dotted Paper (DDP)01

Diamond Dotted Paper (DDP)

Chengrui Insulation Material supply diamond dotted paper for transformer manufacturers, with common ...

Thermally Upgraded Diamond Dotted Paper  (TU DDP)02

Thermally Upgraded Diamond Dotted Paper (TU DDP)

Thermally Upgraded Diamond Dotted Paper is a 120°C thermal class insulation material for oil-immerse...

Electrical Insulation Kraft Paper Manufacturer|Custom DPC Paper03

Electrical Insulation Kraft Paper Manufacturer|Custom DPC Paper

Electrical insulation kraft paper manufacturer supplying transformer manufacturers and insulation co...

Electrical Insulation Pressboard For Transformer04

Electrical Insulation Pressboard For Transformer

Transformer pressboard for pressboard transformer insulation and transformer insulation pressboard a...

3021 Electrical Phenolic Paper Laminated Sheet05

3021 Electrical Phenolic Paper Laminated Sheet

Electrical grade phenolic paper sheet 3021 a high-performance electrical insulating laminate, also k...

Electrical Grade Insulation Crepe Paper For Transformer06

Electrical Grade Insulation Crepe Paper For Transformer

Electrical insulation crepe paper is mainly used in oil-immersed transformer. Chengrui Insulation su...

6051 Insulating Polyimide Film07

6051 Insulating Polyimide Film

6051 polyimide film or polyimide film sheet is one of the electrical insulation film. It is synthesi...

Densified Laminated Transformer Board Electrical Wood Sheet08

Densified Laminated Transformer Board Electrical Wood Sheet

Chengrui Insulation can provide densified laminated wood boards in standard sizes or process parts(c...

Certification

Certificate
Certificate
Certificate
Certificate
Certificate
Certificate

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Quick Answersfor You

Quick answers to your pressing questions.

Q: What international certifications does your insulating paper have?

A: Our products comply with IEC standards and can also provide RoHS environmental certification reports upon customer request. All certification certificates are available upon request.

Q: If I cannot provide complete specifications, can you assist with the selection process?

A: That's exactly what we excel at. Our technical sales team has extensive experience. Please provide your application scenario, operating temperature, voltage level, and other requirements, and we will recommend the most cost-effective and efficient insulation material solution for you.

Q: How about MOQ?

A: The standard minimum order quantity(MOQ) is usually 1000kg. For customized products, the specific quantity can be negotiated.

Q: Can you provide samples for testing?

A: Yes. We are happy to provide free samples to potential customers with specific project needs. Please tell us your specific application and testing requirements so that we can recommend the most suitable model and arrange for sample delivery.

Q: Are you a trader or manufacturer?

A: We are a manufacturer of composite insulating papers (such as DMD and NMN) and insulating sleeves, with our own factory and production lines. At the same time, we have established strong strategic partnerships with other material manufacturers, enabling us to act as your one-stop sourcing consultant, efficiently meeting your diverse product needs.

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