UTR Insulation Sheet Manufactured By Zibo Haichen Composite Materials

UTR Insulation Sheet: Definition & Zibo Haichen's Manufacturing

What is UTR Sheet?

UTR  is a halogen-free, fiberglass mat-reinforced polyester laminate engineered for high-performance electrical insulation and flame resistance . As a NEMA GPO-3 grade thermoset composite, it is produced by impregnating alkali-free fiberglass mat with unsaturated polyester resin, followed by high-pressure curing.

Key Properties

- Superior Electrical Insulation: Excellent dielectric strength and resistance to arc and tracking (over 1,000 minutes tracking resistance), preventing short circuits and leakage.
- UL94 V-0 Flame Retardant: Halogen-free formulation generates low smoke and low toxicity during combustion, ideal for high-safety environments .
- High Mechanical Strength: Rigid, impact-resistant, and non-shattering; provides structural support while insulating .
- Thermal Stability: UL temperature ratings of 120–210°C (electrical) and 130–210°C (mechanical) for consistent performance at elevated temperatures .
- Easy Machinability: Drill, punch, shear, and machine with standard metalworking equipment; well-suited for high-speed processing .
- Cost-Effective: Outperforms phenolic laminates and replaces costly epoxy/silicone materials in many applications .

Common Applications

- High/low-voltage switchgears, distribution boards, and control panels
- Transformer and motor insulation supports
- Electrical safety barriers and insulating work surfaces
- New energy equipment, rail transit, and marine systems

Zibo Haichen's UTR Sheet Manufacturing

Zibo Haichen Composite Materials Co., Ltd. (formerly Zibo Haiqiang Composite Materials Co., Ltd.), founded in 1992 in Zibo, Shandong Province, is a specialized manufacturer and R&D enterprise for advanced composite insulation products.

Core Competencies

- Certified Quality: ISO 9001 (quality), ISO 14001 (environment), UL, and REACH certifications.
- Professional Expertise: 30+ years in composite materials; in-house R&D institute (established 2008) collaborating with universities.
- Full-Scale Production: In-house production of UTR/GPO-3 sheets, SMC insulation boards, and custom machined components .
- Advanced Processes: Compression molding, pultrusion, injection molding, and hand lay-up for diverse product requirements.

Why Choose Haichen's UTR Sheet?

- Premium Raw Materials: High-quality fiberglass mat and halogen-free polyester resin for consistent UTR-grade performance .
- Precision Manufacturing: Strict quality control for thickness uniformity, dimensional stability, and electrical/mechanical properties.
- Custom Solutions: Custom sizes, thicknesses (0.79mm–50.8mm), and CNC-machined parts per drawings.
- Reliable Supply: Stable production capacity and timely delivery for domestic and global clients .

Conclusion

UTR sheet is a critical high-performance insulation material combining electrical safety, flame resistance, and mechanical durability. Zibo Haichen, as a trusted Chinese manufacturer, delivers high-quality UTR sheets and custom insulation solutions for global electrical, industrial, and new energy markets.