Newbie looking at 6040 (China CNC) for polypropylene 15mm sheet

[m_c]

My current system is one of those cheap bendy hoses with air and "mist".
I have pretty decent air going through it with a tiny amount of regular water and have not had any chip welds.

Probably could do with some sort of coolant fluid or additive in the water though to assist.

Is the air flow enough to blow the chips well out the way?
Provided it's keeping chips well away from the cutter, then your setup should be fine. Even if you have to give an extra blast occasionally, it sounds like you've got a reasonable setup, and I wouldn't worry.

It might be worth trying some of the misting fluids though. This is what I used to use - http://www.johnnealeltd.co.uk/shopenvirocutse10.html