How to seal nylon ?

[mark2222]

Hello,

We would like to use nylon to hold ink. This is part of a pen that is being 3d printed in nylon 12.

Is there a post production technique that we could use to stop the nylon absorbing the ink ?

Thanks for any pointers !

 

[mark2222]

I received some information from RelTek about their products :

"The B-45 and B-482 are possibilities. You mentioned that the reservoir might need to be dipped; the two epoxies are simular viscosity to honey, which makes it fairly easy to pour into a container and dip your parts in to coat.

However, surface prep on the nylon may be required to increase surface energy and create a stronger bond. We recommend abrading the surfaces with 100-120 grit sandpaper and clean with isopropyl alcohol. Ideally, the adhesive coating should fall between .004'-.007' thick over the nylon, to ensure a good cross-link. Average cure time is 24-36 hours at ambient. "

RelTek get huge credit in my book for answering so effectively.

This is looking close to a viable solution.

 

[Demon3]

Glad they answered with practical advice although it sounds like they don't have full comprehension of the topic. For example surface energy is not increased by abrasion or an alcohol wash. Sanding just gives more surface area.

Chris DeArmitt PhD FRSC CChem