We describe hardware and software features of an image analysis-based instrument developed in our laboratory to characterize web structure.The potential value of detailed web analysis that is possible today using image analysis is illustrated for a small number of roofing mat webs by characterizing basis weight (small area) uniformity,fiber bundle orientation (directionality control)_and fiber bundle diameter (dispersion quality).From this analysis,we show that it is possible to observe differences in web structure between the top and wire sides of webs,built-up roofing and shingle mat webs,production with hydraulic pressurized (closed) and atmospheric (open) headboxes.production with and without a flow synchronizer,and web basis weight.
展开▼
