About: http://webisa.webdatacommons.org/383860435

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	The surface sulfonation process decreases the permeability of the inner thermoplastic pipe to volatile hydrocarbons and other gases that might affect the performance of the outer thermoplastic reinforcing layer.
http://www.w3.org/ns/prov#wasQuotedFrom	freshpatents.com