The invention below relates to a doctor blade device with an elongated doctor blade intended to operate continuously against a roll surface (2) and/or a cylinder surface (20) during scraping or wiping off material (IB) on the surface (20), which doctor blade device (5) comprises a carrier beam (10) adapted to the length of the roll surface or cylinder surface, which carrier beam has a clamping arrangement (4) for the positioning of a carrier part (3), arranged, in a groove in the longitudinal direction, to slidably carry the doctor blade (6), wherein the carrier part (3) comprises a carrier blade (30), a lip means (14) arranged at the carrier blade (30) and a spacer element (12) arranged between the lip means (14) and the carrier blade, wherein the carrier blade (30), the lip means (14), and the spacer element (12) are arranged, along a first long side edge of the carrier blade (30) between them, to form said groove (15) for slidable positioning in the longitudinal direction of the doctor blade (6) by support of the carrier blade (30), the lip (14), and the spacer element (12).

The invention below relates to a doctor blade device with an elongated doctor blade intended to operate continuously against a roll surface (2) and/or a cylinder surface (20) during scraping or wiping off material (IB) on the surface (20), which doctor blade device (5) comprises a carrier beam (10) adapted to the length of the roll surface or cylinder surface, which carrier beam has a clamping arrangement (4) for the positioning of a carrier part (3), arranged, in a groove in the longitudinal direction, to slidably carry the doctor blade (6), wherein the carrier part (3) comprises a carrier blade (30), a lip means (14) arranged at the carrier blade (30) and a spacer element (12) arranged between the lip means (14) and the carrier blade, wherein the carrier blade (30), the lip means (14), and the spacer element (12) are arranged, along a first long side edge of the carrier blade (30) between them, to form said groove (15) for slidable positioning in the longitudinal direction of the doctor blade (6) by support of the carrier blade (30), the lip (14), and the spacer element (12).

A method for creping paper includes applying an adhesive composition to an outer surface of a creping cylinder (Yankee cylinder) to form an adhesive coating, contacting paper with the adhesive coating, removing the paper and adhesive coating from the creping cylinder, and determining a quality of the adhesive coating. Determining the quality of the adhesive coating may include measuring a degree of cross-linking of the adhesive polymer, a concentration of the adhesive polymer in the adhesive coating, a water content of the adhesive coating, an ash content of the adhesive coating, or combinations thereof. Determining the quality of the adhesive coating may also include determining a thickness of the adhesive coating by measuring light absorbed by the coating and calculating the thickness using Beer's Law. Systems and apparatuses for determining the quality of the adhesive coating and for creping paper are also disclosed.

A method for creping paper includes applying an adhesive composition to an outer surface of a creping cylinder (Yankee cylinder) to form an adhesive coating, contacting paper with the adhesive coating, removing the paper and adhesive coating from the creping cylinder, and determining a quality of the adhesive coating. Determining the quality of the adhesive coating may include measuring a degree of cross-linking of the adhesive polymer, a concentration of the adhesive polymer in the adhesive coating, a water content of the adhesive coating, an ash content of the adhesive coating, or combinations thereof. Determining the quality of the adhesive coating may also include determining a thickness of the adhesive coating by measuring light absorbed by the coating and calculating the thickness using Beer's Law. Systems and apparatuses for determining the quality of the adhesive coating and for creping paper are also disclosed.

A composition is disclosed that may include an adhesive agent and a release aid. A Yankee dryer coating is also disclosed that may include a release aid. The release aid may include a cationic polymer salt that is a reaction product of a polyamine or a polyalkyleneimine and a substituted alkyl trialkyl quaternary ammonium salt. Also provided are methods of treating and creping paper.

A composition is disclosed that may include an adhesive agent and a release aid. A Yankee dryer coating is also disclosed that may include a release aid. The release aid may include a cationic polymer salt that is a reaction product of a polyamine or a polyalkyleneimine and a substituted alkyl trialkyl quaternary ammonium salt. Also provided are methods of treating and creping paper.

The current method relates to an on-line characterization of paper or paper products, such as tissue or other crepe paper products. The method uses an imaging source wherein one or more images are obtained of the sheets surface or topographical area or region, or the image is of an edge of a formed sheet. The one or more images are enhanced and analyzed using various techniques and metrics for characterizing the structure of the formed sheet. The information provides for real time adjustments on the machine.

A crepe process includes applying an adhesive composition to a nonwoven web, drying, and creping the nonwoven web on a creping drum. The improvement includes using an adhesive composition that includes an aqueous copolymer dispersion obtained by emulsion polymerization of a monomer mixture including 65 to 94.5% by weight of vinyl acetate, 5 to 30% by weight of ethylene, (meth)acrylamide, and 0.1 to 4% by weight of an N-methylol functional monomer. The N-methylol functional monomer constitutes from 25 to 85% by weight of the combined amounts of acrylamide and N-methylol functional monomer, which combined amounts constitute from 0.5 to 5% by weight of the monomer mixture. The emulsion polymerization is performed in the presence of 1 to 10% by weight of polyvinyl alcohol, based on the total weight of all monomers used for the polymerization. The adhesive composition does not include alkylphenol ethoxylates, phosphate ester surfactants, or sodium laureth sulfate.

A hygienic tissue paper includes first slits that are disposed in a longitudinal direction at predetermined intervals, the first slits extending in a width direction intersecting the longitudinal direction, wherein the first slits each include perforations, and wherein a cut length of each of the perforations increases from at least one end in the width direction toward a central portion in the width direction.

A creping blade and a preparation method thereof are provided. The creping blade comprises a base, wherein a wear-resistant coating is provided on the top of the base, and a protective layer is arranged below the wear-resistant coating at the contact point between the creping blade and a dryer, and the hardness of the protective layer is lower than that of the surface of the dryer of a paper machine. The creping blade of the invention is advantageous in that the friction portion of working surface has an unlimited area and has a high wear-resistant coating, and the paper impact portion has high wear resistance and high impact resistance, so that the creping blade has a long service life, which can be several times or even tens of times that of the common steel creping blade.