Discuss the various aspects of heat pressed vinyl transfers. Popular and new types of vinyl media, suppliers, vinyl cutters /plotters, press times, quality, how to instructions and more can be found in this heat press sub forum.
Depending on the particular flavor of nylon, the melting point could be 400* to 650*. nylon is basically a polymer (plastic) melted and spun into fibers then made into fabric. The properties of the polymer that is used determines the melting point. Either way, you should be OK pressing at the time and temps you need for heat pressed vinyl, but I'd plan on wasting one jacket as a test just as a safety buffer.
First of all, it depends on what kind of vinyl your normal t-shirt vinyl is. It may or may not be suited for nylon.
It also depends on what temp you need to use for that vinyl. Whatever the temp, be sure to use your teflon sheet.
I would stay away from inkjet transfers for nylon. Those usually need to be pressed longer, and at a higher temp. I think you'll get a much more professional, clean look with the RIGHT vinyl.
They should be able to recommend a material specifically for nylon. Most materials that are specifically for cotton and polyester. Others have specialty adhesives that are designed to adhere to smooth surfaces such as nylon and leather.
These nylon compatible products usually have melting points for the adhesive at lower temperatures and shorter dwell times.
I have used the Eco Film Plus on nylon jackets.....they turned out great and the customer was thrilled enough to recommend me to a fire dept. and also a track team....
I got this at Imprintables Warehouse......easy ppl to work with.
100% Nylon.... 
