
I have just completed the testing of the relative strength of samples of polyester and silnylon tent fabrics that have been exposed to the elements for a rather long period of 500 days. The new polyester supported a load of 14 Kg without breaking. The exposed polyester broke at about 8 Kg of load, while the silnylon began to break at 2 Kg. Here is a little video of my primitive testing with a bucket of water as the load.
For more information on my polyester/silnylon testing, please see; https://timtinker.com/polyester-ageing-test-for-tent-fabric/
Tim