Flame-retardant four-core optical cable

A flame-retardant four-core optical cable is designed with multiple protective layers, including a PE sheath, fire-retardant layer, PBT jacket, and central reinforcement, ensuring high-temperature resistance, mechanical durability, and stable data transmission.

Structure and Materials

A typical high-temperature flame-retardant four-core optical cable includes the following layers: PE Outer Sheath: Provides environmental protection and mechanical strength.

Fire-

Retardant Layer: Positioned inside the PE sheath to prevent fire propagation. Wearing Layer: Enhances abrasion resistance and reduces deformation under pressure. Compressive Layer: Protects the optical fibers from external pressure and mechanical stress.

PB

T Loose Jacket: Encases each optical fiber, preventing mutual extrusion and friction. Optical Fiber Core: Four single-mode or multimode fibers for high-speed data transmission. Central Reinforcement: Provides structural stability and prevents bending or crushing.

Separation Region with Filling Paste: Surrounds the compressive layer to further protect fibers and maintain signal integrity.

Performance Characteristics

Fire Resistance: The cable meets flame-retardant standards, delaying combustion and maintaining operation during fire events. Mechanical Durability: High tensile and compressive strength, suitable for conduit, aerial, or direct burial installation. Data Transmission: Supports high-speed communication with low signal loss, suitable for single-mode (OS2) or multimode (OM3/OM4) fibers.

Environmental Resistance: Non-metallic design prevents corrosion and lightning-induced interruptions, making it ideal for humid or outdoor environments. ApplicationsFlame-retardant four-core optical cables are widely used in: Telecommunications: 5G base station access, enterprise networks, and data centers.

Safety-

Critical Systems: Fire alarm systems, voice evacuation networks, and public building communications.

High-

Risk Environments: Tunnels, metro lines, and areas requiring continuous operation during fire emergencies. Common ModelsGYXTW (Armored) and GYXTY (Unarmored): Central beam tube designs with flame-retardant layers. Gyftzy Series: Non-metallic, flame-retardant, suitable for outdoor and complex cabling scenarios.

Draka Fire

Tuf: Armored, fire-resistant, and bend-insensitive, compliant with IEC 60331-25 and IEC 60332-2-3-24C standards. These cables combine high flame-retardant performance, mechanical protection, and reliable optical transmission, making them essential for modern communication infrastructure where safety and stability are critical.