This product is made of polyether polyurethane elastomer as the base material, adding high-efficiency flame retardant and other processing aids, and is made by mixing, plasticizing and granulating. It has excellent performance such as halogen-free, high flame retardant grade, high resilience, hydrolysis resistance, heat resistance, weather resistance, oil resistance, etc., and can add matte, frosted and other effects according to customer needs; no precipitation pollution, in line with Rohs and other relevant requirements.
Suitable for 3.0\5.0\8.0 Optical Cable Outer Sheath.
Product Parameters
| Testing items | VALUE | Typical Value | UNIT | Method |
| Physical properties | ||||
| Density | 1.20±0.05 | 1.2 | g/cm3 | GB/T 1033 |
| Hardness (6mm plate) | 90±3 | 90 | HA | GB/T 2411 |
| Brittle temperature | ≤-40 | -40 | ℃ | GB/T 5470 |
| UL temperature grade | 80 | 80 | ℃ | UL |
| Mechanical properties | ||||
| Tensile strength before aging | ≥10 | 17 | M Pa | GB/T 1040 |
| Elongation at break before aging | ≥400 | 550 | % | GB/T 1040 |
| Performance after aging110℃×168h | ||||
| Tensile strength retention rate | ≥70 | 76 | % | GB/T 2951.12 |
| Elongation at break retention rate | ≥70 | 90 | % | GB/T 2951.12 |
| Tear resistance | ≥40 | 40 | N/mm | CQC1103-2015 appendix B |
| IRM902,100℃*168H | ||||
| Tensile strength retention rate | ≥70 | 82 | % | / |
| Elongation retention rate | ≥70 | 85 | % | / |
| Flame characteristics | ||||
| Oxygen Index | ≥25 | 25 | % | GB/T 2406 |
TPU Thermoplastic Polyurethane Cable Jacket Material is a high-performance material used for cable jackets.
It has been widely used in the fields of data transmission and communication due to its unique physical and chemical properties.
1. Abrasion Resistance:TPU materials have excellent abrasion resistance, which is essential for the long-term stability of optical cables in various environments.
2. Flexibility:TPU can maintain flexibility even under low temperature conditions, which helps the installation and maintenance of optical cables in cold environments.
3. Chemical Resistance:TPU is resistant to many chemicals, including oils, acids and alkalis, which makes it suitable for use in chemically polluted environments.
4. Weather Resistance:TPU can resist the erosion of ultraviolet rays and ozone, keep the material performance from deteriorating, and is suitable for outdoor use.
5. Hydrolysis Resistance:TPU has low permeability to moisture and can protect the inside of the optical cable from moisture damage.
6. Flame Retardancy:By adding flame retardants, TPU can be made into cable jacket materials that meet different flame retardant standards, such as UL standards or IEC standards.
7. Environmental Protection:TPU is a recyclable material that does not contain harmful substances and meets environmental protection requirements.
1. Communication optical cable: used to protect optical fibers from physical damage and environmental impacts, ensuring the stability of data transmission.
2. Industrial automation: In automation equipment and robotic systems, TPU-sheathed cables can withstand frequent bending and twisting.
3. Automotive cables: used for cable protection inside cars, such as connecting wires for sensors and actuators.
4. Medical equipment: In medical equipment, TPU-sheathed cables can provide the necessary flexibility and biocompatibility.
5. Energy and infrastructure: In wind power, solar energy and other renewable energy systems, TPU sheathing materials can protect cables from harsh environments.
Flame-retardant TPU optical cable material is a type of highly elastic, abrasion-resistant, oil-resistant, halogen-free flame-retardant polyurethane sheath material used in optical fiber loose tubes, outdoor drop cables, mining optical cables, and military/specialty optical cables.
Its role is to protect optical fibers in harsh environments while meeting flame-retardant requirements.
It is ideal for: Indoor and outdoor bending-resistant drop cables (FTTH) Special/military/police communication cables High-flexibility optical cables (robotics cables, rail transit) Petrochemical, mining, and industrial automation optical cables
① Matrix resin: TPU (thermoplastic polyurethane) Generally, it is polyether-based TPU because it is more resistant to hydrolysis, has stronger low-temperature flexibility, and better processing stability. Some formulations use polyester-based TPU as a reinforcing version (to improve abrasion resistance and mechanical strength).
② Flame Retardant System (Core Differentiation)
TPU itself is flammable, therefore the flame retardant system is the soul of the material. It generally includes: Halogen-free flame retardant systems (mainstream, low toxicity)
Common Combinations:
Phosphorus-nitrogen flame retardants (MPP, APP, intumescent systems)
Organophosphorus flame retardants (non-halogen)
Synergies (flame retardant carbon source + foaming agent)
Features:
Less smoke
No corrosive gases produced
Can meet UL94 V-0 / IEC 60332-1
Halogenated systems (used for higher flame retardant ratings)
Used for demanding specialty optical cables, such as those used in mining.
However, they are generally not used in civilian communications because they produce smoke and corrosive gases.
③ Processing and Stabilizing Agents
Used to maintain extrusion stability and long-term performance:
Heat stabilizers (TPU is highly heat-sensitive)
Antioxidants
Light stabilizers (prevent yellowing)
Flow modifiers (improve melt uniformity)
① Extremely High Mechanical Properties
TPU is known for its "strength and toughness":
Tensile strength: 25–50 MPa
Tear strength≈50–100 kN/m
High abrasion resistance (previously used in shoe soles and industrial belts → optical cables also enjoy the same protection)
Optical cable pressure resistance and stab resistance are significantly improved.
② High Flexibility (Especially Suitable For Optical Cables With Small Bending Radii)
Remains soft even at -40°C
Does not crack
Suitable for long-term dynamic bending
Gradually replacing PVC/Nylon/PE in the application of special optical cables. For FTTH cables, TPU can significantly improve bending life.
③ Excellent Flame Retardant Properties
A well-formulated system can achieve: IEC60332-1, UL94V-0, VW-1, FT1 / FT2
This is crucial for cabling in confined spaces (indoors, computer rooms, subways).
④ Strong Environmental Resistance
TPU has excellent inherent properties: Oil-resistant, Hydrolysis-resistant (polyether type), Antimicrobial, Abrasion-resistant, UV-resistant (with light stabilizer). It exhibits very stable performance in industrial cable applications.
