| 摘要 |
<p>Non-woven webs are produced from cellulose, synthetic, or glass fibers utilizing a foam-laid process by employing fuzzy controllers. By using a fuzzy controller, it is possible to precisely control the foam-laid process to allow production of non-woven webs of a variety of different types of fibers, which webs have high uniformity, and high predictability, by allowing the foam to be handled in such a way that it always remains stable and substantially uniform. By using fuzzy controllers one may control at least the wire pit level, the mixer/pulp level, the manifold pressure for the former, the foam density, the efflux ratio (the velocity of the foam divided by the velocity of the wire), surfactant feed, total basis weight of the web produced, and particularly when glass webs are being made, the binder tank level. Particular input parameters are used for each of the fuzzy controllers. For example, the fuzzy controller for automatically controlling the level in the mixer/pulp tank has as its input parameters at least some (two through all) of the density and flow rate of foam being recirculated to the tank from the wire pit, the pH of the foam in the tank, the level of the foam in the wire pit, and the fiber added to the tank. A neural net control may be utilized for effecting quality control of substantially the entire method or system for making a non-woven web, and laboratory testing information is fed to the neural net control to facilitate its functionality.</p> |
