At FRIEND GROUP, innovation is driven by a relentless pursuit of excellence in electrical insulation solutions. We are proud to introduce two groundbreaking products that redefine industry standards: F870CP Silicone Glass Cloth Laminated Sheet and F881NH Halogen-Free FR4 Epoxy Glass Cloth Laminated Sheet. These materials combine superior technical performance with environmental responsibility, addressing the evolving demands of high-voltage systems, renewable energy infrastructure, and global sustainability mandates.
F870CP: Unmatched Electrical Stability in Extreme Environments
The F870CP Silicone Glass Cloth Laminated Sheet sets a new benchmark for electrical insulation in high-stress applications. With a CTI (Comparative Tracking Index) of 600 and arc resistance of 220 seconds, this material excels in environments where traditional insulators falter. CTI 600 ensures exceptional resistance to surface leakage current even under humid or contaminated conditions, making it ideal for high-voltage equipment such as EV charging stations, solar inverters, and industrial power modules . The 250-second arc resistance rating-a critical parameter for safety in switchgear and transformers-dramatically reduces the risk of catastrophic failures caused by electrical arcing.
Constructed with a proprietary silicone resin system reinforced by glass cloth, F870CP delivers:
- High mechanical strength: Resilient against thermal cycling and mechanical stress, essential for components subjected to vibration or thermal expansion.
- Low flammability: Compliant with UL 94 V-0 standards, minimizing fire propagation risks in enclosed systems.
Applications span across industries:
- Renewable energy: Protects inverters and grid infrastructure from voltage surges and environmental contaminants.
- Automotive: Enhances safety in high-voltage EV battery packs and power electronics.

F881NH: Halogen-Free FR4 for Sustainable Electronics
The F881NH Halogen-Free FR4 Epoxy Glass Cloth Laminated Sheet represents a leap forward in eco-friendly circuit board materials. Building on the proven reliability of FR4, this innovation eliminates hazardous halogens while maintaining superior flame retardancy. By achieving UL 94 V-0 certification without brominated or chlorinated compounds, F881NH meets the strictest international environmental regulations, including RoHS, REACH, and IEC 61249-2-21 .
Key advantages include:
- Enhanced electrical properties: Maintains FR4's low dielectric constant and dissipation factor, ensuring signal integrity in high-frequency circuits.
- Global compliance: Facilitates market access in regions with stringent environmental policies, such as the EU and North America.

Why Choose FRIEND GROUP's New Materials?
Both F870CP and F881NH embody our commitment to performance, sustainability, and customer-centric innovation:
Technical Leadership: Our R&D team leveraged advanced polymer science to optimize formulations, ensuring CTI 600 and halogen-free FR4 properties that outperform industry norms.
Certification Assurance: Products undergo rigorous third-party testing to meet UL, IEC, and regional standards, minimizing compliance risks for clients.
Customization Flexibility: Tailored solutions for thickness, surface finish, and mechanical properties are available to address unique application requirements.
Supply Chain Reliability: Backed by FRIEND GROUP's global manufacturing network, ensuring consistent quality and timely delivery.
Join the Electrical Insulation Evolution As industries accelerate toward electrification and sustainability, FRIEND GROUP's F870CP and F881NH stand as testament to what's possible when innovation meets responsibility. Whether you're designing next-gen power grids, EV infrastructure, or eco-friendly electronics, these materials empower you to engineer with confidence.

