It should have the ability to fuse nylon, though you'd have to experiment with fuse rate and such. The color spectrum for most nylon is right for it to be susceptible, given how fast it chows a hole in electrical tape.

The collimation is fairly tight I am told, you might get a foot or two spread at half a mile, maybe less. My buddy is experimenting with different lensing settings attached to his to diverge the beam, with some pretty good results. I think he gets an 8' spot at 400 yards that is intensely bright using his current lensing configuration. He also says he can see some nodal patterning once in a while. I have to admit, it is pretty wild to watch him move the spot down the road towards a building. The spot doesn't lose much intensity as it moves away. Cohesive light is a darned cool thing.