Fibrous tape base material

Details Fibrous tape base material Fibrous tape base material

D - Textiles, Paper

21

H

28/7

D21H 27/00 (2006.01) C09J 7/04 (2006.01) D21F 11/00 (2006.01) D21H 25/00 (2006.01)

Patent

CA 1309242

ABSTRACT OF THE DISCLOSURE A sheet of fibrous web material having opposite smooth sur- faces, an apparent bulk in the range of about .10 to about .20 caliper pts/lb ream and a machine direction stretch of at least 8%, wherein surface undulations on the opposite smooth surfaces of the sheet have an amplitude variance of less than .0002 inch. The invention includes an apparatus and a method of manufacturing the product comprising partially dewatering a wet fibrous web to about 30% to 50% solids, converying the web to a compression nip defined by a smooth-surfaced roll and a smooth-surfaced fabric material, moving the fabric material at a speed of about 10% to 20% less than the surface speed of the smooth-surfaced roll, com- pressing the web in the nip with a compression force of less than 15 lbs/linear inch, with an average pressure of less than about 50 psi in the compression nip, and drying the web. The dried web¦ has an apparent bulk less than .20 caliper pts/lb ream.

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