Abstract:
A soft, embossed, sanitary paper product having a basis weight 10.17 to 101.72m² (between about 6 and about 60 pounds per 2,880 square feet) and having a cross-machine direction tensile 22.32 to 1116.12 g/cm (between 2 and 100 ounces per inch), the paper having a plurality of bosses extending up and down from a formed midplane, each upward extending boss being flanked on two sides, in each of two directions, by a downwardly extending boss, and in at least one of the two directions, the paper between an upward extending boss tip and an adjacent downward extending boss tip on one side has a higher strain than the paper between the upward extending boss tip and an adjacent downward extending boss tip on the opposite side, and its production.
Abstract:
Apparatus for dispensing a length of sheet material from a roll (33) eg of paper towels is actuated in response to the proximity of a portion of a band of a user to the apparatus without the hand of a user contacting the apparatus. The dispensing is done by an electrical motor (57) operating for a predetermined time and which can be powered by batteries (61). An LED (50) transmits pulses of light which are sensed by a sensor (52) arranged on the opposite side of a hand receiving open cavity (46q). When the pulses of light are interrupted by the hand a capacitor (88) is enabled to actuate the dispensing mechanism. The housing (31) of the apparatus has a modular frame (46) having a first compartment (46b) for the means for advancing the sheet material and a second compartment (46f) for the means for activating the advancing means. The dispensing apparatus can include means for storing energy (eg., 61) for energizing the advancing means in response to the withdrawal of sheet material from the dispensing apparatus by a user.
Abstract:
In a process for bleaching lignocellulosic pulp with ozone, irradiation of the pulp with ultraviolet light enhances the efficiency of the ozone and the bleachability of the pulp.
Abstract:
There is described a papermaking machine of the type wherein a web of lignocellulosic fibers is formed, and wherein the formed web is transferred to a dewatering and imprinting felt, said felt and web then passing through a nip formed by a pressure roll and a drying cylinder so as to deposit the web on the drying cylinder, said web having a dryness level between 7 percent and 35 percent as it enters said nip, characterized by the felt having imprinting yarn strands forming knuckles adjacent to the web contacting surface of the felt, the imprinting yarn strands having a spacing of about 6 to about 25 per 0.0254 meters but not significantly exceeding the average fiber length, the felt having a web facing greater than about 153 grams per square meter, and the felt having a ratio of face web in grams per square meter to the diameter in meters of the imprinting yarn strands adjacent to the web contacting side of the felt of from about 60,000 to about 600,000 wereby the web is differentially pressed onto the dryer surface. The machine of this invention is especially useful in manufacturing sanitary paper tissue and towel products.
Abstract:
Method of providing a desired surface effect in a release coating including the steps of applying a coating of an electron beam radiation curable composition or material to a side of a substrate (7), pressing the coated side of the substrate (7) against a replicative surface having the desired surface effect e.g. a surface textured roll (18), and irradiating the coating with electron beam radiation at a curing station (3) through the substrate (7) to partially cure the coating sufficiently to enable it to be removed with the substrate (7) from the replicative surface securely attached to the substrate (7) and with the replicated surface effect in the coating being maintained, the improvement being the further step of irradiating the coating a second time at a curing station (5), preferably from the other side, with electron beam radiation without first applying additional coating.