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Attaching foam to plasticized PVC

Attaching foam to plasticized PVC

Attaching foam to plasticized PVC

Hey guys - have a question for you... a product that I am developing has an extruded length (32" long) of plasticized PVC covered by foam (not sure exactly what formulation is being used now by subcontractor) – but whatever is required/suggested can be obtained.

The profile of geometry in question is attached with PVC shown in black and foam in gray.

The question is – what'd be the easiest and best way to "weld" these two parts together? Currently 3M 467MP adhesive transfer tape is being used – because the bond has to take at least 250F temperature, and a margin of safety on top of that is nice – but an issue still exists – the attachment is a bit too soft, flexible, and the tips of the foam (which is cut out of a flat sheet) 'fly up' and out of 'containment slots' with significant deformation. Any suggestions for what chemicals that might create a no-fail bond (the word weld again comes to mind) between the two surfaces here?

Thanks a lot, everyone.

-Gene Gisin

RE: Attaching foam to plasticized PVC

Oh, and

is the picture referenced in the message above. :)

RE: Attaching foam to plasticized PVC

Use a foamed pvc and solvent bond it to the other part?

RE: Attaching foam to plasticized PVC

Thanks for the reply, sir. I will investigate that option, but I believe that foamed PVC is unlikely to provide enough resistance in normal usage - being either too hard or too brittle.

Thank you, however!

RE: Attaching foam to plasticized PVC

Err...no.  PVC can have widely varying modulus depending on how much plasticizer (I think) is in the mix.  Soft PVC (vinyl rubber) foam is available from McMaster.com for instance.

RE: Attaching foam to plasticized PVC

You are right. Thanks again! I'm pursuing this lead, with some good results from initial tests. Weld-on P-68 Primer (just primer, not even glue!) seems to glue PVC foam to reasonably heavily plasticized PVC quite well.  

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