Goel, AmitArns, ChristophHolmstad, RGregersen, O WBauget, FabriceAverdunk, HolgerSok, RobertSheppard, AdrianKnackstedt, Mark2015-12-070826-6220http://hdl.handle.net/1885/21820The effect of papermaking variables on the structure and transport properties of paper samples was analyzed Various newsprint samples were prepared on a pilot paper machine by varying the raw material furnish and process parameters, including headbox consistency, retention aids and calendering. Three-dimensional digital images of the sample structure were obtained by using the synchrotron X-ray computed tomography facility at ESRF, Grenoble, France. Structural parameters (porosity, specific surface area, pore-size distribution and tortuosity) and transport properties (permeability and diffusivity) were calculated directly on the digitized images. Results indicate that the calendering operation plays a dominant role in altering the structure and transport properties of the samples.Keywords: Calendering; Computerized tomography; Newsprint; Raw materials; Transport properties; X ray analysis; ESRF (CO); Three dimensional digital images; X ray computed tomography; X ray microtomography; Papermaking; Calendering; Newsprint; Paper Making; Raw Mat Calendering; Newsprint; Paper properties; Permeability; Pore size distribution; Porosity; Specific surface; Variables; X ray analysis20062015-12-07