Patent ID: 8398819

Claim:
A method of moist creping absorbent paper base sheet, the method comprising the steps of: (a) forming a nascent web comprising at least a major proportion of recycled fibers, wherein at least a major portion of the recycled fibers, as determined on a length-weighted basis, exhibits flattened ribbonlike cellulosic fibers; (b) applying a creping adhesive coating comprising an admixture of polyvinyl alcohol and a polyamide crosslinked with epichlorohydrin to a Yankee dryer; (c) passing the nascent web through a nip defined between a suction pressure roll and the Yankee dryer; (d) adhering an inner surface of the nascent web to the Yankee dryer with a controlled loading between the suction pressure roll and the Yankee dryer; (e) drying the nascent web on the Yankee dryer to a desired moisture content; (f) controlling, during the drying step, an outer surface of the nascent web to a web surface temperature of between about 110° C. and about 121° C., the web surface temperature being measured just prior to a creping step; (g) creping the nascent web from the Yankee dryer with an undulatory creping blade bearing against the Yankee dryer, to form a moist biaxially undulatory web, a contact area between the undulatory creping blade and the Yankee dryer defining an undulatory ribbon shape across the width of the Yankee dryer; (h) controlling, during the creping step, the web surface temperature to between about 110° C. and about 121° C.; and (i) following the creping step, drying the moist biaxially undulatory web to form a dry biaxially undulatory web.