From Loctite:
"PP is the more difficult of your two substrates to bond. Our best
solution is to apply Primer 770 to the PP, then try one of our cyanoacrylates, such as 401. This should give you a good bond, but you would need to test for the fluid exposure, as cyanoacrylates do not typically have the best long-term resistance
to water. Another possibility with better fluid resistance, but lower adhesion to PP, would be a UV acrylic, such as 3105. The datasheets can be downloaded from our website."
|