don't get me wrong ...I've got no dog in this hunt I just stumbled on the topic and because I've worked with delrin a lot and because of the tendency lately for a lot of the people around here to throw around the word delrin and not really understand it... I do it to because delrin is a lot easier to say than Acetal copolymer resin
no I wasn't speaking about dupont.... delrin is just dupont's trademark name for that type of plastic ... the company I was thinking on is called TPI and they distribute quadrant plastics for the food industry...
here's a link
Total Plastics, Inc.
well that does depend on the right sort of plastic really... problem is that there's dozens of plastics right now in this industry that people are calling delrin... and theres a good dozen or so different delrin products....
Ok here's the thing....let me see how I can put this delicately....
as a side job I make some toys for the fetish minded folks...
delrin has long been a trend in what we'll call impact toys in that industry....because
the right kind of delrin.....is nonporous and therefore antimicrobial so it's easy to clean and be assured that no bacteria or fluids are left behind...
there ARE plastics that serve better than metal... I'd advise against nickel plating the interior of a juice tank.... annodizing would be superior to that and superior to bare aluminum... yes the right kind of plastic or glass would be surperior to that...as far as health and safety and bacterial issues go..
generally dupont is sketchy about saying anything is food safe or medical grade...
the other manufacturers will state something like : FDA, USDA, NSF, 3A Dairy and Canada AG compliant (that's for ACETRON® GP - CO-POLYMER ACETAL though)
delrin from the same place just says: FDA, NSF and 3A Dairy compliant
and those two examples are prime for what I mean as far as the right kind of plastic they're both Acetal ( ones copolymer and the other homopolymer) both resin.... but here:
ACETRON® GP - CO-POLYMER ACETAL
Improved dimensional stability vs. nylon - lower moisture absorption
Porosity-free rod and plate - minimized bacteria build-up, easier to sanitize
Low, consistent internal stress minimizes dimensional change in machining and use
Used in general bearing and wear and mixing components
FDA, USDA, NSF, 3A Dairy and Canada AG compliant
DELRIN® - HOMOPOLYMER ACETAL
Slightly higher strength than co-polymer acetal
Used in general, structural and bearing applications
(porosity may cause sanitation issues)
FDA, NSF and 3A Dairy compliant
both are considered food safe...but which sounds better to you
my