Will the properties of waterproof fabrics change when exposed to high temperatures?

The properties of waterproof fabrics may change when exposed to high temperatures.
Specifically, when a waterproof fabric is exposed to a high temperature environment, such as between 240°C and 260°C, it may undergo thermal degradation, causing its waterproof performance to gradually weaken. In more serious cases, high temperatures may also cause the waterproof fabric to become brittle and deformed.
In addition, waterproof fabrics are usually made of polyester fiber, polyurethane and other materials. These materials are prone to oxidation reactions at high temperatures, resulting in changes in the properties of the materials.
Therefore, when using waterproof fabrics, especially in high temperature environments, care should be taken to avoid prolonged exposure to high temperatures, so as not to affect its waterproof performance and service life.