Paper makers wet felts

Details Paper makers wet felts Paper makers wet felts

1977-08-08

1979-07-24

Fisher, Richard V.

Paper making and fiber liberation

Apparatus

Running or indefinite length product forming and/or treating...

162358, 428280, 428282, 428288, 428300, 34 95, D21F 708, D21F 712

Patent

active

041621905

ABSTRACT:
A paper making apparatus of the type having a movable endless belt which conveys a wet web of paper between a pair of pressure rollers for driving water out of the web and then passing the web to a drying zone. A surface layer of the belt is formed from a water-absorbent nonwoven fiber material and a backing layer is provided which is coarser than the surface layer and is formed from water-absorbent wads of separate fibers. The surface layer has hydrophobic properties such that the surface layers has a critical surface tension less than 33 dynes per centimeter and is held in intimate contact with the backing layer by fibers of the surface layer which penetrate and are needled into the backing layer. The layers are thus so integrated that water forced into the surface layer by the pressure rollers is readily taken up by both layers to be retained thereby.

REFERENCES:
patent: 2943379 (1960-07-01), Foltz, Jr.
patent: 3214326 (1965-10-01), Lee
patent: 3214327 (1965-10-01), Wicker et al.
patent: 3329554 (1967-07-01), Hencken
patent: 3392079 (1968-07-01), Fekete
patent: 3401467 (1968-09-01), Koester
patent: 3545442 (1970-12-01), Wicker et al.
patent: 3664905 (1972-05-01), Schuster

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