Polyester felts: polyester provides superior thermal shock resistance, excellent fatigue endurance, puncture resistance and crack bridging capabilities.
The use of polyester reinforcements is widespread in modified bitumen systems. The primary benefit of using polyester in modified bitumen systems is for its high elongation properties and tensile strength.
This is well suited to the performance of the modified bitumen coating. Polyester also exhibits high puncture resistance; tear strength and the durability to withstand high roof traffic.
The true strength of polyester reinforcements are that much more puncture resistant then the fiber reinforcements.
Polyester can remain dimensionally stable during the torching application or when applied in hot asphalt.