Bonding PTFE to EPDM

[magusinp]

I am designing a product which will be using a diaphragm. It needs to be PTFE coated EPDM. The supplier sent back samples bonded with an acrylic-based double-coated film. These diaphragms peeled right apart. I believe there is a better way to bond PTFE to EPDM. I have heard that the best way is to burnish the PTFE surface with a primer and then bond using a cyanoacryate gel. But this is just one idea. What do ya'll think? And can you recommend some product?

 

[unclesyd]

There are two ways to achieve somewhat of a bond with Teflon, both involved surface modification. If you have quantities use a plasma etch. If it is low volume use a chemical etch such as Tetra-Etch. It is still a bear of a job.
You have to work with the adhesive suppliers to find out which adhesive will work the best with each system.

http://www.ptiwebsite.com/index.cfm/ac/home

http://www.abbetch.com/about.htm

 

[btrueblood]

ECTFE may be a better "teflon" to use for bonding.

Why do you need Teflon?