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Premium Electrical Insulation Materials for Global Industries

Xuchang Chengrui Insulation Materials Co., Ltd. is a trusted manufacturer of high-performance electrical insulation paper, films, boards, and composite materials. UL certified, IEC compliant, and exported to over 100 countries.

Electrical Insulation Paper Products

About Us

A reliable partner in electrical insulation solutions with over 15 years of expertise in manufacturing high-quality materials for motors, transformers, and industrial systems.

Factory and Production Line

Trusted Manufacturer of Electrical Insulating Materials

Xuchang Chengrui Insulation Material Co., Ltd. is a leading global supplier of electrical insulation solutions. Our comprehensive product line includes composite papers (DMD, NMN), insulation films, sleevings, pressboards, and specialty papers designed for durability and performance under extreme conditions.

All our products comply with international IEC standards and are UL certified. We maintain strict quality control from raw material sourcing to finished goods, ensuring consistency and reliability across every batch.

15+
Years Experience
3000+
Sq M Factory
100+
Countries Served
20M+
Annual Sales (USD)

Our Premium Products

High-performance electrical insulation materials engineered for reliability, heat resistance, and long-term durability.

Diamond Dotted Paper

Diamond Dotted Paper (DDP)

Epoxy-coated electrical insulation paper with diamond pattern for enhanced adhesion and mechanical strength.

  • • F-grade thermal class
  • • Used in motor windings
  • • UL recognized
  • • IEC compliant
Insulation Presspahn Paper

Insulation Presspahn Paper

High-density pressboard paper for transformer insulation with excellent dielectric strength.

  • • High compressive strength
  • • Low moisture absorption
  • • Ideal for core insulation
  • • Custom thickness available
Kraft Cable Insulation Paper

Electrical Cable Kraft Paper

100% sulfate wood pulp kraft paper for high-voltage cable insulation.

  • • High tensile strength
  • • Excellent dielectric properties
  • • Moisture-resistant
  • • Used in power transmission
Electrical Insulation Pressboard

Electrical Insulation Pressboard

Laminated pressboard for transformers and high-voltage equipment.

  • • High mechanical strength
  • • Low dielectric loss
  • • Custom shapes & sizes
  • • UL & IEC certified
Crepe Paper for Transformers

Insulation Crepe Paper

Highly flexible crepe paper made from superior sulfate insulation pulp.

  • • F-grade thermal rating
  • • Excellent conformability
  • • Used in transformer coils
  • • Resists cracking
DMD Insulation Paper

6641-F DMD Insulation Paper

Three-layer composite: polyester film sandwiched between two layers of insulating paper.

  • • F-class (155°C)
  • • High dielectric strength
  • • Slot liner for motors
  • • UL recognized
NHN Insulation Paper

6520/6521 NHN Insulation Paper

Two-ply laminate: polyamide film between two layers of presspaper.

  • • H-class (180°C)
  • • High thermal stability
  • • Used in high-temp motors
  • • Excellent mechanical strength
NMN Insulation Paper

6640 NMN Insulation Paper

Three-ply laminate with Nomex® and polyester film for superior performance.

  • • F-class (155°C)
  • • Flame retardant
  • • High tear resistance
  • • Ideal for EV motors

Why Choose Our Insulation Materials?

Engineered for performance, durability, and global compliance.

UL Certified

All products are UL recognized and meet rigorous safety and performance standards.

IEC Compliant

Designed and tested to meet international IEC standards for electrical insulation.

Custom Solutions

We offer tailored materials to meet specific voltage, temperature, and mechanical needs.

Global Shipping

Trusted by clients in over 100 countries with reliable logistics and support.

15+
Years in Industry
3000+
Sq M Factory
100+
Countries Served
$20M+
Annual Sales

Frequently Asked Questions

Quick answers to your pressing questions.

Q: What international certifications do your insulating papers have?

A: Our products comply with IEC standards and are UL certified. We can also provide RoHS environmental certification reports upon customer request.

Q: Can you customize insulation materials for specific applications?

A: Yes, we offer flexible customization for thickness, width, thermal class, and mechanical properties to meet your design requirements.

Q: What is the lead time for bulk orders?

A: Standard lead time is 15–25 days depending on order size and customization. We offer expedited options for urgent needs.

Q: Do you supply samples before bulk purchase?

A: Yes, we provide free samples for evaluation. Shipping may apply depending on destination.

Q: Which industries use your insulation materials?

A: Our products are used in motors, transformers, generators, EVs, power cables, and industrial drive systems worldwide.

Get in Touch

Contact Xuchang Chengrui Insulation Materials Co., Ltd. for product inquiries, samples, or custom solutions.

[email protected]
+86-15939981307
http://paperinsulation.com

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