Thermally fused braid. In other words heated to a point where the fibres bond together no polymer is used to bond it only heat thats why UV affects it badly. Dyneema is dyneema. It is the worlds strongest fibre. Used by police and armed forces in bullet protection clothing and armor. Check this site out
http://www.dsm.com/en_US/html/hpf/home_dyneema.htm give it a read and see if you change over to straight dyneema braid. You will notice the difference.
Cheers Moggy