And yes it's stronger than degraded polyester.
Quoted from the following link: "Tenara M1000 is similar in weight to V-92. Its breaking strength is 8-10 lb. vs. 14 lb. for V-92, but M1000 does not lose strength over the years." (v-92 is polyester)
http://www.lotathings.com/images/threadguide.pdf