By Dr. David R. Roisum
The reasons for measuring web weight are many. First, it is the most common quality measure in commerce. Weight is simultaneously an important attribute, machine setting, and test measurement.
It is also an extremely important factor in economics. Approximately half of the cost to produce a web is in raw materials, so losing tight control of weight may mean losing control of profit, even if you are in spec.
Finally, it is a necessary alternative to measuring thickness, which is ill-defined for many soft and fuzzy materials such as foam, nonwovens, textiles and tissue. We will cover the measures and issues with thickness in the next video clip.