Low-smoke, halogen-free, flame-retardant (LS HFFR) compounds are increasingly preferred in cable and wiring applications because they reduce smoke density and eliminate halogen-derived corrosive gases during a fire. In enclosed or high-occupancy environments - such as buildings, transportation systems, and infrastructure - these characteristics can improve visibility, reduce damage to sensitive equipment, and support safer evacuation and recovery. LS HFFR materials are often specified to meet evolving fire, smoke, and toxicity requirements while still delivering the mechanical performance, flexibility, and durability needed for modern cable designs.
Why Choose Halogen Free Flame Retardant (HFFR) Compounds?
HFFR Product Portfolio / Material Grades
Application / Use Cases for HFFR Cables & Compounds
Building wiring & residential/commercial wiring: Improved fire performance and reduced smoke generation to support safer electrical installations.
Industrial cables: Flame-retardant, halogen-free cable solutions designed for demanding industrial environments.
Data centers / server rooms / IT infrastructure: Low-smoke, halogen-free materials help limit corrosive smoke and support protection of equipment and personnel during fire events.
Public infrastructure / mass transit / rail / tunnels / marine / shipboard wiring: Applications with stringent safety and regulatory requirements where low-smoke, halogen-free performance is essential.
Power cables, energy distribution, high-voltage / medium-voltage cables: applications requiring flame-retardant, halogen-free performance within the appropriate voltage and thermal limits.
- Specialty environments: including hospitals, high-occupancy buildings, underground installations, and confined spaces — where low-smoke, halogen-free cable materials support visibility and evacuation safety.
Certifications & Compliance Standards
Relevant Standards & Test Categories May Include:
Fire Propagation & Smoke Performance (Finished-Cable Tests): These tests evaluate flame spread, heat release, and smoke development at the cable level under defined fire scenarios.
EU / CPR: EN 50399 (large-scale cable fire testing for heat release, flame spread, and smoke), along with IEC/EN 60332-1-2 and IEC/EN 60332-3 flame-spread series. Classification is defined under EN 13501-6, with market placement governed by EN 50575 (CPR).
North America: UL 1685 vertical-tray flame testing (including FT4 / IEEE 1202 exposures, supporting limited-smoke evaluations) and UL 1666 riser testing (CMR flame propagation height).
Industrial / Commercial Tray Applications: IEEE 1202 (FT4) vertical-tray flame test, often referenced in conjunction with UL 1685.
Marine & Offshore: IEC shipboard cable standards (e.g., IEC 60092-360 material families), typically used alongside IEC 60332, IEC 60754, and IEC 61034 for LS HFFR shipboard cables.
Rail: EN 45545-2 fire safety requirements, with smoke and toxicity assessments commonly conducted using ISO 5659-2 and EN 17084 where applicable.
Smoke Density & Emission (Materials and Cables): These tests focus on quantifying smoke generation during combustion.
IEC 61034: Optical smoke density measurement.
ISO 5659-2: Single-chamber smoke density testing, widely referenced in rail and transportation applications.
Halogen-Free / Acid Gas Performance (Materials and Cables): These evaluations verify reduced halogen acid gas emission and corrosivity during fire events.
IEC 60754-1 / IEC 60754-2: Halogen acid gas content and corrosivity.
UL 2885: Assessment supporting UL halogen-free and acid-gas material recognition.
Wire & Cable Test Method Compendia (North America): These standards define general physical, electrical, and flame test methods used across many cable constructions.
- UL 2556 / CSA C22.2 No. 2556: General wire and cable test methods, including VW-1 flame testing and related physical and dielectric evaluations.
Regulatory & Application Frameworks: These frameworks govern market access and product compliance rather than individual test methods.
EU Construction Products Regulation (CPR) via EN 50575, with performance classification under EN 13501-6.
RoHS, REACH, and other regional environmental or product-safety regulations, as applicable.
常见问题解答：
LS HFFR compounds are low-smoke, halogen-free, flame-retardant materials used primarily in wire and cable applications. They are formulated without halogen-containing additives and are designed to limit smoke generation and corrosive gas release during fire events while providing required mechanical and electrical performance.
Unlike PVC and other halogenated flame-retardant materials, LS HFFR compounds do not contain chlorine or bromine. In fire conditions, this helps reduce corrosive halogen acid gases and smoke density. Material selection between LS HFFR and PVC depends on application requirements, regulatory standards, and performance trade-offs rather than one material being universally better than another.
LS HFFR compounds typically have different processing characteristics than PVC and may require adjustments to extrusion parameters such as temperature profiles, screw design, or line speed. While they are not direct drop-in replacements for PVC, LS HFFR materials can be processed efficiently on conventional wire and cable equipment with proper setup and optimization.
