Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Water Soluable Coating

Status
Not open for further replies.

Executnr

Mechanical
Jun 12, 2003
23
I am looking for a coating that can be applied to a cardboard cylinder that will ultimatly be submerged in water. The coating needs to extend the time needed for the water to soak through the cardboard but not make the cardboard waterproof.

It needs to be non-toxic as well.

Any info would be helpful
Thanks
Wayne Soule
KS Design llc
 
Replies continue below

Recommended for you

Try soybean oil, AKA a lecithin or an ester, or a water emulsion silicone. These would slow down the water permeation, but eventually wash out and allow water through.
 
Polyvinyl alcohol would give a reinforcing effect while dry and a controlled solubility on entering water. ISP ltd should be able to help, they do loads of varyingly soluble polymers like polyvinylpyrollidone that would allow you to fine tune the solubility. They're also very safe biologically which is pretty important if I'm guessing correctly!

Regards Nairbo
 
There is a product that you can try and can be found at It comes in various formulas. It is basically a no stick coating that is hydrophobic, but gas permable.

Malcolm
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor