Paper making and fiber liberation – Processes and products – Non-uniform – irregular or configured web or sheet
Patent
1991-04-30
1993-06-29
Chin, Peter
Paper making and fiber liberation
Processes and products
Non-uniform, irregular or configured web or sheet
162111, 162112, 162113, 162117, D21H 2718
Patent
active
052230929
ABSTRACT:
A sheet of fibrous web material having one textile-like surface and an opposite substantially smooth surface, a grain depth memory factor greater than 80, an apparent density in the range of about 4 to about 7 pound ream/caliper point in mils, a caliper (at a basis weight between about 50 and about 75 pounds/3000 square feet) greater than 0.008 inch, and a machine-direction sheet stretch of at least 5%. The invention includes a method of manufacturing the sheet comprising partially dewatering a wet fibrous web to about 30% to about 60% solids, conveying the web to a compression nip defined by a smooth-surfaced roll and a textured-surfaced fabric material, moving the fabric material at a speed of about 15% to about 35% less than the surface speed of the smooth-surfaced roll, compressing the web in the nip with a compression force between about 5 pounds/linear inch and about 100 pounds/linear inch, with an average pressure of between about 20 pounds per square inch and about 400 pounds per square inch in the compression nip, subjecting the fabric material to a tension on opposite sides of the compression nip with the tension on the fabric material entering the nip being greater than the tension on the fabric material exiting the nip, and drying the web.
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Bouchette Michael P.
Grinnell Gary C.
Klowak Bernard G.
Chin Peter
James River Corporation
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