In rapidly developing industries such as new energy vehicles, industrial automation, and rail transit, high-voltage wiring harnesses have become a key component in electrical systems. High-voltage wiring harnesses have put forward higher requirements on material performance, among which flame-retardant TPU (thermoplastic polyurethane) is gradually becoming the preferred material for wiring harness sheaths and insulation layers. This article will explore in depth the application value and advantages of Flame-Retardant TPU in high-voltage wiring harnesses.
High-voltage wiring harnesses usually work in high-voltage, high-temperature, easy-to-friction, and flammable environments. Conventional PVC or PE materials are gradually insufficient in terms of heat resistance and flame retardancy.
Flame-retardant TPU developed by Angreen is a thermoplastic elastomer with excellent flame retardant properties and flexibility. It is specially designed to withstand high temperatures and prevent the spread of fire. Due to its excellent performance, it has become a popular choice in various industries, especially in high-voltage wiring harnesses.
In contrast, flame-retardant TPU has the following core advantages:
·Excellent flame-retardant performance (meeting UL94 V-0 standard)
·Wear-resistant and scratch-resistant, suitable for complex wiring environments
·Excellent flexibility, improving wiring efficiency
·Stronger resistance to chemical corrosion (oil, solvent, acid and alkali, etc.)
·Low smoke and halogen-free, more environmentally friendly, in line with international standards such as RoHS and REACH
The operating voltage of new energy vehicle battery systems is usually as high as 400V~800V, requiring wiring harness materials to have high flame retardancy and heat resistance stability. Flame-retardant TPU sheaths not only improve the safety of the entire vehicle, but also effectively extend the service life of the wiring harness.
Under high-frequency movement and complex working environments, traditional cables are prone to damage and aging.
The flame-retardant TPU sheath has good resilience and fatigue resistance, can adapt to dynamic cable bending requirements, and ensure long-term stable operation of equipment.
The demand for high safety levels drives the rail transit industry to adopt low-smoke halogen-free flame-retardant materials. TPU is widely used in vehicle cables and control system harnesses due to its dual advantages of environmental protection and flame retardancy.
In addition, it can also be used to produce high-voltage cables for renewable energy equipment wiring systems, high-voltage cables for aerospace electrical cable systems, etc.
| Performance indicators | PVC | XLPE | Flame retardant TPU |
| Flame retardant grade | V-2 | V-0~V-1 | V-0 |
| Flexibility | General | General | Excellent |
| Abrasion resistance | Poor | Medium | Excellent |
| Environmental protection | Halogen | Halogen-free | Low smoke and halogen-free |
| Bending life | Low | Medium | High |
As can be seen from the table, flame-retardant TPU has obvious comprehensive advantages in safety and durability, especially in high-voltage systems that require flexible and dynamic wiring.
IV. Key technical indicators for selecting flame-retardant TPU materials
When selecting flame-retardant TPU materials, it is recommended to focus on the following technical parameters:
Flame Retardant Grade: UL94 V-0
Tensile Strength:≥25 MPa
Abrasion Resistance coefficient:≤0.2
Low Smoke Zero Halogencertification:RoHS, REACH
Operating temperature range: -40℃~ +125℃
As electrical systems evolve towards high performance, high density and environmental protection, flame-retardant TPU is gradually replacing traditional materials and becoming one of the standard configuration materials for high-voltage wiring harnesses.
If you are looking for a sheath material that combines safety, flexibility and durability, flame-retardant TPU is undoubtedly a priority choice.
