Method and apparatus for temperature gradient calendering

Details Method and apparatus for temperature gradient calendering Method and apparatus for temperature gradient calendering

D - Textiles, Paper

21

G

92/4

D21G 1/00 (2006.01) D21G 1/02 (2006.01)

Patent

CA 1264588

METHOD AND APPARATUS FOR TEMPERATURE GRADIENT CALENDERING ABSTRACT OF THE DISCLOSURE A web of paper or similar material is sub- jected to at least one nip formed by an iron roll and a compliant roll. The iron roll is heated to a tempera- ture of at least the temperature at which the fibers in the web begin to deform. In the case of paper this is approximately 350°F. Preferably the web is passed through two nips the first nip polishing one side of the web, the second nip polishing the other side. The result is a web having improved gloss without sustantial loss of bulk and with minimum mottling.

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