I predict its still gonna suck, polyester already has really good stain resist properties as it is, there really isn't a whole lot that can stain it, its also much more resistant to bleaches, the problem with it is not its ability to repel stains, it does that already and always has, the problem is the fibers all fall over in one direction or the other and trap dirt on one side of the fibers, its a tuff problem as I don't care how much power your truckmount has it still will not lift the fibers and fluff them like you can on a nylon, this lifting and fluffing is what what makes the fibers stand up and makes it release the soil from the fibers. The mills and mill reps are pretty much insane and oblivious to the problems with polyester, I have had mill look me dead in the eye and tell me an olefin glue down is way better than a nylon glue down carpet. they don't see this stuff everyday after its put down, all they see is a carpet that looks just as good next to the nylon samples. if they can solve the problems with it all crushing over one way then they have something, but I don't see that happening, one thing I have always wondered is why they never use polyesters in loop type carpets, since polyester is kinda in between nylon and olefin for wear ability, I wonder how it would perform in a loop carpet especially in a low loop commerical carpet,
polyester is awesome in clothing, I make sure my work pants and work shirts are made with polyester, they dry quickly, stains don't soak in, they wash up good, and never need to be ironed. I think that is where they should stick with poly on
