×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Water Soluble Paper Dissolution as a Function of Time

Water Soluble Paper Dissolution as a Function of Time

Water Soluble Paper Dissolution as a Function of Time

(OP)
Hi All,

I am looking for a water soluble paper for an application that necessitates the paper remain intact underwater for a period of time between 4-12 hours. This specification is not yet exact, nor is it necessary to be extremely precise, rather just that the paper remains intact for a larger time period than instantly dissolving.

The typical conditions that the paper must operate in would be water of about 55F and generally static water pressure, with occasional (5-10x/Hr) dynamic pressures exerted on it due to water flowing past it briefly (~5 seconds). The paper would not be serving as a barrier, but rather adhering to the inner surface of the vessel using a water activated adhesive.

I am aware that there are commercial suppliers of water soluble papers, but it appears that they do not have a method to control the dissolution beyond the few seconds/minutes that it normally takes (it is simply a function of the thickness of the paper).

Does anyone know of a coating that could be applied to the paper that would itself take 4-12 hours to dissolve off, thereby exposing the paper to water which would then dissolve the paper? Ideally the chemical applied would not interact with either the Sodium Carboxy Methyl Cellulose nor commercially available inks that may be printed onto the water soluble paper (not sure yet of the chemical composition of the inks).

Thanks for any thoughts you may have!

 

RE: Water Soluble Paper Dissolution as a Function of Time

Coat the paper with a water soluble polymer like PVA (polyvinyl alcohol)or carbopol (water soluble acrylic).

 

RE: Water Soluble Paper Dissolution as a Function of Time

(OP)
Hi CompositePro,

How would I go about varying the time until the PVA etc dissolves? would mixing it in different molar solutions effect this? or perhaps multiple coats?

i would do some experimentation to determine the concentrations/etc vs. time but am unsure as to what my variables would be!

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources