D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 5/20 (2006.01) D21F 5/18 (2006.01) D21F 11/14 (2006.01)
Patent
CA 2452031
The energy efficiency of a throughdrying papermaking process is improved by recycling exhaust air from one or more throughdryers to further heat the web at various places in the process. The present invention provides for a process for making tissue comprising the steps of forming a wet tissue web by depositing an aqueous suspension of papermaking fibers onto a forming fabric; partially dewatering the wet tissue web while it is supported by a papermaking fabric; drying the wet web in one or more throughdryers, wherein heated drying air gathers moisture from the wet web as it is passed through the wet web and is exhausted from the throughdryer(s); and recycling exhaust air from one or more of the throughdryers to heat the fabric at one or more points in the process.
L'invention concerne l'amélioration du rendement énergétique d'un procédé de fabrication de papier par séchage à l'air par recyclage de l'air d'évacuation d'un ou de plusieurs dispositifs de séchage à l'air afin de chauffer la bande de papier à divers endroits au cours du processus.
Gropp Ronald Frederick
Hada Frank Stephen
Hermans Michael Alan
Leitner Charlcie Christie Kay
Parszewski Marek
Borden Ladner Gervais Llp
Kimberly-Clark Worldwide Inc.
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