Method of drying a web
AssigneeKimberly-Clark Worldwide, Inc.
InventorsRussell F. Ross, Jack C. Lau
Life of this patent
Estimating the term…
Abstract
A method of drying a paper web is provided. The method utilizes a dryer, such as a through-dryer, having a first dryer section and a second dryer section. Within the first dryer section, a relatively wet paper web is dried at an elevated temperature, such as between about 400° F. to about 500° F. After being dried by the first dryer section, the web is relatively dry and is further dried by the second dryer section at a reduced temperature, such as between about 300° F. to about 400° F. A variety of control techniques can also be utilized to control the temperature of each dryer section.
Claims39
A method for drying a paper web comprising:
- providing a through-dryer having a first dryer section and a second dryer section;
- drying a relatively wet paper web having a solids consistency between about 20% to about 40% within said first dryer section at an elevated temperature to form a relatively dry paper web without significantly increasing the temperature of the paper web above the thermal degradation temperature of the paper web;
- and
- subsequently drying the relatively dry paper web within said second dryer section at a reduced temperature in comparison to said elevated temperature.
A method for drying a paper web comprising:
- providing a dryer having a first dryer section and a second dryer section;
- drying a relatively wet paper web having an initial solids consistency of between about 20% to about 40% within said first dryer section at an elevated temperature to form a relatively dry paper web without significantly increasing the temperature of the paper web above the thermal degradation temperature of the paper web, wherein said relatively dry paper has a solids consistency between about 45% to about 70%;
- and
- subsequently drying the relatively dry paper web within said second dryer section at a reduced temperature in comparison to said elevated temperature.
A method for drying a paper web comprising:
- providing a through-dryer having a first dryer section and a second dryer section;
- drying the paper web having an initial solids consistently less than about 60% within said first dryer section at an elevated temperature ranging from about 400° F. to about 500° F. to form a paper web having a solids consistently greater than about 25% without significantly increasing the temperature of the paper web above the thermal degradation temperature of the paper web;
- and
- subsequently drying the paper web having a solids consistently greater than about 25% within said second dryer section at a reduced temperature ranging from about 300° F. to about 400° F.
A method for drying a paper web comprising:
- providing a dryer having a first dryer section and a second dryer section;
- drying a relatively wet paper web within said first dryer section at an elevated temperature to form a relatively dry paper web without significantly increasing the temperature of the paper web above the thermal degradation temperature of the paper web;
- and
- subsequently drying the relatively dry paper web within said second dryer section at a reduced temperature in comparison to said elevated temperature, wherein said elevated temperature ranges from about 400° F. to about 500° F. and said reduced temperature ranges from about 300° F. to about 400° F.
Dependencies are inferred from the claim text.