Does Acetal Delrin emit fumes when warmed up?

[Hewhowearsmanyhats]

I'm using Delrin as a tray to hold small tubes while they cure in an convection oven that is warmed to 50 degrees C and cured over 38 hours. These tubes are sprayed with a chemistry and I'm concerned that the delrin might emit an vapor and contaminate the batch. Is there a concern? Should I pre heat the trays prior to loading them to "season" the delrin?

 

[Pud]

There is a possibility that Delrin (POM) might emit formaldehyde.

Your idea might be worthwhile.

Cheers

Harry

http://www.tynevalleyplastics.co.uk

 

[patprimmer]

Delrin is a very poor choice for an oven tray. It does emit formaldehyde when heated and if heated to much for to long will continue to produce formaldehyde as a byproduct of its degradation.

I would use polyester or even polypropylene at those temperatures. The PP will be a bit flexible but it is quite inert to a very wide range of chemicals. By comparison, polyesters are rigid, inert to almost everything and temperature resistant.

Regards
Pat
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[Demon3]

Polystyrene and SAN should also work, i.e. inert and able to withstand the temperature. Cheaper than Delrin too.

Chris DeArmitt

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