for a hammock, you will probably much prefer a slick nylon. you can slide around easier and it feels good to your skin.
i wouldn't want one made of cordura or anything with a texture like that for a hammock. that includes supplex/taslan
you can get nylon taffeta a little heavier than 1.9 ripstop.
also consider just using two layers of 1.1 or 1.9 or one of each. this should give you plenty of strength.