In recent years, invisible car clothes have become popular in the automotive aftermarket with various advantages, but at the same time, many car owners have doubts: in the final analysis, isn't invisible car clothes a layer of plastic or rubber film? In that case, will high temperature affect its structural change and reduce its performance?

确实，炎热的夏季、加上车身90%以上都是更容易吸热的金属材质，汽车内温度普遍在60度以上。曾有人成功在引擎盖上烤鱼煎蛋，车友对于高温是否会影响隐形车衣性能有所担忧也属正常，那么隐形车衣究竟耐不耐高温呢？

Indeed, in hot summer, more than 90% of the body is made of metal materials that are easier to absorb heat, and the temperature in the car is generally more than 60 degrees. Some people have successfully roasted fish and fried eggs on the hood. It is normal for motorists to worry about whether high temperature will affect the performance of invisible car clothes. So can invisible car clothes withstand high temperature?

在此小编想说，隐形车衣能不能抗住高温袭击得由基材决定。

In this small series, I want to say that whether the invisible car clothes can resist the high temperature attack depends on the substrate.

1、PVC（TPH）基材所制作的隐形车衣不耐高温

1. The invisible car clothes made of PVC (TPH) substrate are not resistant to high temperature

PVC——聚氯乙烯，也称塑料，稳定性差，耐热性差。温度长期保持在55℃以上会缓慢分解，温度越高，降解速度越快；温度在77~90℃会玻璃化，而100℃以上会产生氯化氢气体，进一步催化分解变色并且物理机械性能下降；故PVC材质隐形车衣在高温情况下很容易内部结构发生改变，性能很不稳定。举例来说：长期被太阳暴晒的水管会变脆、变黄；同理PVC材质的隐形车衣容易变黄，撕膜留胶，有时甚会散发一种奇怪的气味。

PVC - polyvinyl chloride, also known as plastic, has poor stability and poor heat resistance. If the temperature is kept above 55 ℃ for a long time, it will decompose slowly. The higher the temperature, the faster the degradation rate; When the temperature is 77 ~ 90 ℃, it will vitrify, while above 100 ℃, hydrogen chloride gas will be produced, which will further catalyze decomposition and discoloration, and the physical and mechanical properties will decline; Therefore, the internal structure of PVC invisible car clothes is easy to change under high temperature, and the performance is very unstable. For example: water pipes exposed to the sun for a long time will become brittle and yellow; Similarly, PVC invisible car clothes are easy to turn yellow, tear the film and leave glue, and sometimes even emit a strange smell.

2、TPU基材制作的车衣耐高温约120℃，不怕晒

2. The car clothes made of TPU base material can withstand high temperature of about 120 ℃ and are not afraid of sun exposure

TPU是热塑性聚氨酯弹性体橡胶，分子结构严密，耐高温，分脂肪族TPU和芳香族TPU两种。聚醚型（芳香族TPU）玻璃化温度为100.6~106.1℃，聚酯型（脂肪族TPU）玻璃化温度为108.9~122.8℃,聚醚型和聚酯型的脆性温度低于-62℃。采用TPU材质制作的车衣要比PVC材质的更加耐高温，而其中高质量的TPU基材（脂肪族TPU）制作的隐形车衣如YEECR，在-30℃到120℃的温度范围内性能稳定，太阳暴晒下车漆表面温度一般是60℃，所以TPU材质的隐形车衣耐高温。

TPU is a thermoplastic polyurethane elastomer rubber with tight molecular structure and high temperature resistance. It is divided into aliphatic TPU and aromatic TPU. The glass transition temperature of polyether type (aromatic TPU) is 100.6 ~ 106.1 ℃, that of polyester type (aliphatic TPU) is 108.9 ~ 122.8 ℃, and the brittleness temperature of polyether type and polyester type is lower than - 62 ℃. The vehicle clothing made of TPU is more resistant to high temperature than that made of PVC, and the invisible vehicle clothing made of high-quality TPU substrate (aliphatic TPU), such as yeecr, has stable performance in the temperature range of - 30 ℃ to 120 ℃, and the surface temperature of vehicle paint exposed to the sun is generally 60 ℃, so the invisible vehicle clothing made of TPU is resistant to high temperature.

综上，PVC基材制作的隐形车衣不耐高温，TPU基材制作的隐形车衣耐高温，并且基材越好耐高温性能越强。

To sum up, the invisible car clothes made of PVC substrate are not resistant to high temperature, and the invisible car clothes made of TPU substrate are resistant to high temperature, and the better the substrate is, the stronger the high temperature resistance is.