This answer is anecdotal and should be read as a guideline.
I had to design a piece of equipment that would be installed on a "wet" food line. This meant that the plastic fascia had to be "food safe". The rest of the equipment was 316 stainless steel and acceptable: -
I could find (back then) no guidelines that were sufficiently global or generic about plastics and, this piece of equipment needed to be CE marked so it was important to get right from a legislative standpoint. The plastic fascia was tooled as part of the design so we had a choice of materials, but what choice?
In the end, I looked at various plastic materials from lego bricks to water bottles (plus many more) and decided that the material used in lego bricks (ABS) had gained enough reputation over decades and that it was a safe bet. The justification for the choice of ABS was documented and there was never a problem.
OK, this answer is just me giving you a guideline on how to tackle this issue - I'm not saying ABS is useful or even practical for what you want. Do some research and find other materials/applications that are similar.