Assertion: lignin's use | /r/HasProperty | limited in its commercial application
Facets:
value: currently
type: TEMPORAL
Source sentences:
text: Currently, the use of kraft lignin in PF resins is limited in its commercial application because lignin has a lower reactivity with formaldehyde compared with phenol, and the lignin-phenol-formaldehyde requires higher curing temperatures (Siddiqui 2013).