Since I printed tickets at home, I was wanting to laminate them to protect them.Does anyone think I will have any problems with that?
You might. I don't know about the Swiss Pass, but you are specifically warned NOT to laminate some passes.
The problem is reading the barcode (QR code?). Lamination causes too much reflection and the scanners the on-train staff use (basically just smart phones) then have trouble reading the pass.
If you are worried about the pass getting mangled, torn or otherwise unreadable, just print out an extra copy (or copies) and put them in an envelope in the bottom of your case. To be used if required.
No problem folding them, as long as the fold does not go through the barcode - they warn you about that as well.