Today, as the automotive industry accelerates towards intelligence and electrification, extremely cold environments remain the "touchstone" for testing the reliability of components. Whether it is fuel powered heavy-duty trucks traveling through the snowy plains of Northeast China or electric vehicles galloping in high-altitude areas, material brittleness and cable breakage caused by low temperatures have always been common pain points that plague the industry. Ordinary sheath materials are prone to hard cracking in severe cold, which not only affects signal transmission but may also pose safety hazards.
The impact of low temperatures in winter on automotive cables is systematic and destructive
When the ambient temperature drops below -20 ℃, ordinary
TPUThe material will become hard and brittle. The reason is that low temperature slows down the molecular chain activity inside the material, causing a sharp increase in material hardness and a significant decrease in elasticity.
During winter testing by car manufacturers, the wiring harness needs to be constantly bent and twisted while the vehicle is in motion, especially the TPU protective covers in the engine compartment and chassis, which are exposed to low temperatures and repeated stress for a long time. In this case, it is easy for small cracks to appear on the surface of the sheath, and as the number of bends increases, the cracks will gradually expand, ultimately leading to fracture.
Winter test data from multiple car companies show that after 500000 bending tests at -30 ℃, the cracking rate of ordinary TPU sheaths exceeds 60%; When the temperature drops to -40 ℃, almost all of them experience brittle fracture. This performance clearly cannot meet the actual usage needs of vehicles in extremely cold regions.
In response to this long-standing industry challenge, Wanhua Chemical has launched a new series of low-temperature resistant cable TPU products - WHT-C886V, C891V, and C894V. The glass transition temperature (Tg) of this series of products has been reduced to below -50 ℃, and it can still maintain excellent low-temperature flexibility and high strength durability in extreme low-temperature environments ranging from -40 ℃ to -50 ℃, fundamentally solving the problem of low-temperature brittle fracture and providing a more universal material solution for automotive cables and wire harness sheaths.
Wanhua Chemical's low-temperature resistant TPU series products, with verifiable performance data, accurately respond to the real pain points of automotive cables under extreme cold conditions. This product not only overcomes the stubborn problem of ordinary materials being easily brittle under low temperature dynamic stress, but also is widely applicable to the full vehicle harness protection scenarios of various vehicle models, providing a universal and reliable cold resistant cable material solution for the automotive industry. In the future, Wanhua Chemical will continue to delve into the forefront of materials science, promote innovative applications of low-temperature resistant TPU materials in more demanding fields, and help the entire industry chain evolve towards higher efficiency, safety, and sustainability.
