I looked up washing instructions for PUL:
http://www.diapersewingsupplies.com/washing-pul-fabric/
My bet is you could not depend on the laundry staff to dry the bibs on low (or hang dry).
It looks to me as if terry cloth backed with vinyl could work. The second link below has information on the different materials used in purchased adult bibs:
http://www.outonthetownbibs.com/
https://www.assistedlivingstore.com/...ers_guide.aspx