[rdb90]

Two part question:
1) If I have a vacuum sealing machine, will the vacuum have 0 humidity?
2) Would a cyanoacrylate glue cure in a 0 humidity vacuum?

Thanks in advance

[magician4]

ref. 1)
as real machines like vacuum sealing machines never will produce a vacuum even near absolute zero Pascal, you always will have minuscule amounts of air left.
those will have their share of relative humidity.

hence: as a practical value, no , you wont have zero humidity from a vacuum sealing machine

it just might be low or even very low, which, on the other hand, might be sufficient for your purpose

ref 2)
typical cyanacrylate glues depend on water vapour  - else nothing would happen.
with very low values of humidity (or, as per your question, 0 humidity) the glue hence might stay next-to-practically-forever uncured


regards

Ingo

[Nitishajack]

Cyanoacrylate does cure in high humidity but bond strength decreases:

http://www.chenso.com/instant_adhesives.pdf

[Arkcon]

Nitishajack:  this thread is over two years old, and the discussion is likely forgotten.  The forum software gives you a heads up when you comment on an old thread by default, and maybe you should think more carefully about what to post.

Also, the topic is about low humidity, not high humidity.  So your post isn't really pertinent.

Also, whenever possible, please provide a citation for a factoid.  Is there an online resource that supports that high humidity weakens the cyanoacrylate bond?  Is this information quantitative?  That is to say, how weak of a bond for how high of a humidity,