About: http://webisa.webdatacommons.org/429721358

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	According to the drawing method, a film such as of polytetrafluoroethylene or polypropylene is drawn at a high temperature and is heat-treated to obtain a porous film.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es