Silane Cross-linked LSZH Flame Retardant Insulation Compound (Class B1/B2) Officially Mass-Produced, Optimized for Global Construction Engineering Cables

Driven by stricter global construction fire safety codes and green building standards, the demand for low-smoke zero-halogen (LSZH) cable materials has surged in high-rise buildings, hospitals, metro tunnels, and data centers worldwide. Our newly developed silane cross-linked LSZH flame retardant insulation compound covering Class B1 & B2 fire ratings has achieved stable mass production, solving long-standing drawbacks of traditional thermoplastic LSZH and irradiation cross-linked materials for cable manufacturers.
Industry Bottlenecks of Conventional LSZH Materials
Thermoplastic LSZH without cross-link structure only withstands continuous temperature below 90℃, failing Class B1 strict fire tests for high-risk construction sites.
Irradiation cross-linked LSZH delivers good heat resistance but requires outsourced radiation processing, raising production cost by 20-30% and causing unstable delivery cycles.
High loading halogen-free flame retardant fillers lead to high melt viscosity, resulting in extrusion defects such as bubbles and sharkskin, lowering finished cable yield.
Core Advantages of Silane Cross-linked LSZH Compound
Cost-effective One-step Cross-link Technology
Silane graft modification enables natural water-bath cross-linking after cable extrusion; no extra irradiation or UV equipment is required. Ordinary cable extrusion lines are fully compatible, cutting overall processing cost by over 15%. After cross-linking, the 3D network structure provides continuous 105℃ heat resistance and outstanding anti-aging performance.
Two Fire Ratings Cover All Construction Scenarios
Class B1 Grade: Passes GB 31247 top construction cable fire resistance test. Limited flame spread, low heat release, and ultra-low toxic smoke emission, ideal for skyscrapers, hospitals, metro, data centers, and underground utility tunnels.
Class B2 Grade: Balanced flame retardancy and smooth extrusion performance, cost-efficient for residential buildings, shopping malls, and general public facilities.
Eco-friendly Low-smoke Zero-halogen Formula
Free of halogens, lead, and heavy metals. Low smoke density during combustion without corrosive toxic gas, complying with LEED green building and EU CPR construction product regulations. Excellent moisture and chemical resistance extends cable service life by over 10 years vs traditional PVC insulation.
High-efficiency Extrusion Performance
Optimized filler dispersion reduces melt pressure, eliminating surface defects and boosting mass production yield up to 99.7%, compatible with high-speed extrusion lines.
Market Outlook & Application
Global LSZH construction cable market maintains a 5.7% CAGR from 2026 to 2030, while Class B1 high-end flame-retardant cable demand grows above 18% annually. This silane cross-linked LSZH compound fits power cables, control cables, and fire-resistant cables for all construction engineering projects.
Global Support Service
Full sets of third-party fire test certificates and combustion performance approvals are available. Free sample extrusion testing, customized formula adjustment, and on-site technical guidance for extrusion & cross-link process are provided for worldwide cable manufacturers.