often threads fraying is due to the needle being used- use a needle specific for the size/type of thread- you may have better luck- Superior Threads is one site that has free charts you can print off explaining the different type/sizes of threads and which needle you should use with them-
sewer's aid is a (thread conditioner) which can also help-
sometimes it is the thread- meant for use in a domestic machine- and being used in a faster running specialty machine-
if i really liked the thread and wanted to use it i would start with finding the correct needle- and correct machine speed for the thread- use sewer's aid- and experiment to see if i could make it work- if everything i try fails i would toss the thread and go looking for the same color/type from a different source.