Product Description
EVA Based HFFR Inner Sheath Compound for RRU Optical Cable
This EVA-based Low Smoke Zero Halogen (LSZH) compound is specifically engineered for the inner sheath layer of RRU (Remote Radio Unit) and outdoor fiber optic cables. It serves as a critical fire safety barrier, providing exceptional flame retardancy and mechanical protection while maintaining the flexibility required for complex cable routing in 5G base stations and telecom networks.
Formulated with a high-performance EVA/PE copolymer matrix and an advanced ATH/MDH inorganic flame-retardant system, this compound ensures zero halogen acid gas emission and ultra-low smoke density during combustion. This protects sensitive electronic equipment from corrosive damage and maintains clear evacuation conditions in the event of a fire.
The material offers excellent processability with smooth extrusion characteristics, ensuring a tight, concentric bond with the cable core. Its optimized balance of flexibility and toughness allows the finished cable to withstand rigorous bending and installation stresses without cracking. Furthermore, the lightweight nature of this compound contributes to a reduced overall cable weight, facilitating easier aerial deployment and reducing the load on support structures.
Fully compliant with RoHS and REACH regulations, this inner sheath compound is the ideal choice for manufacturers producing high-reliability RRU cables, FTTH drop cables, and aerial ADSS cables that demand the highest standards of fire safety and environmental sustainability.
Property | Unit | Enterprise Standard | Typical Value | Test Method |
Density | g/cm3 | ≤1.45 | 1.33 | GB/T 1033.1-2008 |
Hardness | Shore D | 46±3 | 47 | GB/T2411-2008 |
Tensile Strength | MPa | ≥12 | 14 | GB/T 1040-2006 |
Elongation at Break | % | ≥350 | 370 | GB/T 1040-2006 |
Aging Performance | ℃×h | 100×240 | 100×240 | GB/T 2951.12-2008 |
Tensile Strength Retention | % | ≥80 | 88 | |
Elongation Retention | % | ≥80 | 83 | |
Impact Brittleness Temperature (-40℃) | ≤15/30 | PASS | GB/T 5470-2008 | |
Volume Resistivity (20℃) | W.m | ≥1×1010 | 2.2×1011 | GB/T 1410-2006 |
Dielectric Strength | MV/m | ≥18 | 28 | GB/T 1408.1-2006 |
Oxygen Index (LOI) | % | ≥25 | 27 | GB/T 2406.2-2009 |
Halogen Acid Gas Emission | mg/g | ≤5 | 1.2 | GB/T 17650.1-1998 |
pH Value | ≥4.3 | 5.9 | GB/T 17650.2-1998 | |
Conductivity | μ.s/mm | ≤10 | 1 |
Excellent Crack Resistance – Prevents jacket cracking during tight bending, thermal cycling and field handling, ensuring long-term cable integrity.
Superior Weathering Resistance – Withstands UV, ozone, humidity and temperature fluctuations for stable outdoor RRU deployment.
High Mechanical Strength – Balanced tensile strength and abrasion resistance provide robust protection for internal optical fiber units.
Good Processability – Smooth melt flow and low die swell reduce extruder pressure and surface defects, improving production efficiency.
Lightweight Cable Construction – PE-based low-density formulation reduces overall cable weight, easing aerial installation and tower load.
RRU (Remote Radio Unit) Optical Cable Outer Jacket – Serves as the primary protective layer for 5G base station RRU cables, ensuring fire safety and mechanical robustness in confined equipment spaces.
Aerial & ADSS Optical Cables – Applied as the outer sheath for self-supporting aerial cables, resisting UV, wind vibration and environmental aging.
FTTH Drop Cables (Indoor/Outdoor Transition) – Used for the outer jacket of FTTH drop cables to maintain flexibility and flame retardancy across indoor-outdoor boundaries.
Underground & Duct Telecom Cables – Functions as a moisture and abrasion resistant barrier for cables installed in ducts or directly buried environments.
5G Base Station & Telecom Backbone Cables – Ideal for high-density telecom cables requiring halogen free, low-smoke jackets to protect critical communication infrastructure.
