i disagree, a nylon fabric is much thinner than nylon sewing thread is. the fabric would degrade long before the thread would, just because it's so much thinner. leave your gear out in the sun for a prolonged period and it will get damaged regardless of thread choice.
i've had about equal success using nylon and polyester bonded thread. alot of quality nylon thread also has a uv resistent treatment as well. bonded is by far the best, this means the thread is made from continuous filaments rather than shorter pieces twisted and rolled together (like gutterman), so it is much less prone to breakage. a quality commercial bonded thread (nylon or poly) is going to be better than the gutterman, i garantee nothing sold in rei or made by any major outdoor gear manufactuer is sewn with gutterman thread or anything like it.
bonded 46 is a good weight, and will probably still be thin enough to work in a home machine. i use 46 for my quilts and 69 for my hammocks and tarps, but the 46 should be strong enough for all those applications. the 69 would likely cause more tension problems in your home machine than the 46 would just because it's a little heavier and better suited for a commercial machine, although i used to sew bonded 69 with my old dressmaker home machine
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