'Vinyl' might mean polyvinyl ethylene--'vinyl' could be a somewhat dated
term for a polyolefin....again the PE or PP are ok as long as they
degrade beautifully with UV. The webbing on outdoor lawn furniture used
to be polyvinyl propylene... and it degraded within a few summers of
exposure.
Mary W. Ballard
Senior Textiles Conservator,
Museum Conservation Institute, Smithsonian Institution
4210 Silver Hill Road, Suitland MD 20746 U.S.A.
tel: 301-238-1210 fax: 301-238-3709
email [log in to unmask]