Abstract: A method for drying fibrous webs utilizing a limiting orifice medium with a plurality of pores. The web is disposed on a supporting fluid permeable carrier. The web is pressed between the supporting carrier and the limiting orifice medium. A vacuum greater than the breakthrough pressure of the pores of the medium is drawn through the pores and the web.

Abstract: Machine for the manufacture of a fiber material web that includes a shoe pressing unit, a cylinder including one of a drying and tissue cylinder, in which shoe pressing unit and the cylinder are arranged to form at least one press nip, and a water absorbent carrier band. A water-impermeable pressing band is provided, in which the water absorbent carrier band and the water-impermeable pressing band are guided through the at least one press nip, and the fiber material web is adapted to pass through the at least one press nip with the water absorbent carrier band and the water-impermeable pressing band. The at least one press nip has a length in a web travel direction of less than or equal to approximately 60 mm. A pressure profile which results over the press nip length has a maximum pressing pressure which is greater than or equal to approximately 3.3 Mpa.

Abstract: A dry end section for a paper-making machine for producing a high-bulk tissue is provided. Such a machine comprises a through-air dryer adapted to finally dry a paper web and a through-air drying fabric configured to transport the web through the through-air dryer. A separating device is included for facilitating separation of the web from the through-air drying fabric. A reel is also provided and is configured to receive the web thereon. The web is received directly on the separating device or on a fabric wrapped about the separating device. In some instances, the web may be compressed between the separating device and an adjacent roll or by a web-compressing device disposed along the fabric transporting the web. The web is then transported to the reel directly from the fabric or other support mechanism extending between the separating device and the reel, without free draw of the web. Associated methods are also provided.

Abstract: Spirally wound paper products are disclosed having desirable roll firmness characteristics and softness properties. The rolled products can be made from a single ply tissue web formed according to various processes. Once formed, the tissue web is subjected to a shear-calendering device that increases the fuzz-on-edge properties of the web and preserves the bulk of the web when wound.

Abstract: The present invention relates to a process of manufacturing a high bulk, low weight paper product produced by using a high level of groundwood containing sheet, blade coating with specifically formulated coatings then passing the paper web between two extended-nip calenders, one calender for each side of paper. As a result, densification of the resulting coated paper product is reduced, while maintaining stiffness and opacity comparable to heavier weight sheets.

Abstract: The present invention relates to a wet-laid non-woven sheet made from a essentially binder-free aramid floc, wherein the aramid floc includes at least 25 percent by weight of para-aramid floc based on the total weight of aramid floc only, and a process for making the sheet.

Abstract: A method and an arrangement for manufacturing calendered paper or board particularly in the on-line manufacturing method. In the method, a base web is formed from a mixture of water and pulp supplied from the headbox and the web is dried by removing water over the press section and over the dryer section by heating. The formed web is calendered at least once to modify the surface on at least one of its sides. Before calendering the cross-direction thickness profile of the web is standardized and calendering is carried out by means of a long-nip calender, whereby good surface quality is obtained without losing the bulk or stiffness of the web.

Abstract: Printing paper or paperboard of 30-200 g/m2 grammage is made in a machine with a wet section, press section and drying section. The web passes through a roll press with a double-felted roll-press nip, then in a shoe press with an extended single or double-felted shoe-press nip, and pressed in a deflection-compensating roll press, having a double-felted roll-press nip and open press rolls. The web travels at at least 1,200 m/min.; is subjected in the roll-press nip to a linear load from 100 to 300 kN-m and a specific pressure from 5 to 15 MPa; and is subjected in the shoe-press nip to a linear load from 500 to 1,500 kN/m and a specific high pressure from 4 to 13 MPa, to obtain a dewatered web with a dry-solids content of at least 38 percent after the roll-press nip and at least 45 percent after the shoe-press nip.

Abstract: A dry end of a tissue machine is made shorter by close-coupling a reel-up to the drying section and supporting the web from the drying section to the reel-up by a foil or a belt such that web stability is maintained, thus allowing high-speed operation. The foil's downstream edge can form a nip with the paper roll and nip load can be controlled by controlling pivotal movement of the foil. The reel-up can include a calendering belt for calendering the web as it passes through a nip between the belt and a reel drum supported on the belt, and a rotatable reel spool on which a paper roll is wound in nipping engagement with the reel drum. Alternatively, the reel drum can be eliminated and the paper roll can be supported on the belt. A composite shaftless core for winding is also disclosed.

Abstract: A method of compressively modifying, such as by calendering, an uncreped throughdried tissue sheet is disclosed. The dried tissue sheet, initially supported by the throughdrying fabric, is removed from the throughdrying fabric and compressively modified. Thereafter, the compressively modified sheet is recombined with a papermaking fabric and carried to a reel section while supported by the fabric. The sheet is always, or substantially always, supported by a fabric or a roll surface to minimize opportunities for sheet breaks or otherwise adversely affecting sheet properties.

Abstract: The present invention relates a method for the manufacture of paper, in particular of coated fine paper, in which method paper stock is fed from a headbox (100) to a wire section (200) in which water is drained from a paper web (W), in which method the paper web (W) is passed from the wire section (200) to a press section (300) to press water out of the paper web (W), and in which method, after the press section (300), the paper web (W) is dried in a dryer section (400), precalendered and coated in a coating station (600), after which the paper web (W) is dried in a drying section (650) and calendered in a final calender (900), and reeled in a reel-up (1000). In the method the stock is fed into the headbox (100) using multilayering technology, the paper web (W) is precalendered in a one or more reinforced-nip calender (500), the paper web (W) is coated in a film coating unit.

Abstract: Tissue paper is calendered in at least one calendering nip. The tissue paper is calendered in at least one soft, long calendering nip. By belt calendering a high crêping effect is achieved when a so-called post-nip contact is used. With post-nip contact, the web and the belt are in contact with the thermo roll over a distance of 10-200 mm after the nip, whereby the belt tension presses the web against the surface of the thermo roll, and hereby the belt expands in the nip, and when it is then restored it will crêpe the paper. In this manner a soft tissue paper with maximum bulkiness is brought about. The belt tension used in the belt calender is 1-10 kN/m.

Abstract: A method for manufacturing a paper or board web in which stock is fed from a headbox (100) to a wire section (200), in which water is removed from the web (W) and from which the web (W) is passed to a press section (300), in which water is pressed out of the web (W) and after which the web (W) is dried in a dryer section (400) and reeled by means of a reel-up (800). According to the invention, additives, fillers and/or fines are fed into the stock of the surface layers of the web (W) in order to reduce the pore size distribution of the web in the surface layers so as to substantially correspond to a precoated web. The invention also relates to a paper or board machine which is characterized in that it is structured for enabling the feeding of additives, fillers and/or fines into a fiber stock such that an uncoated web substantially corresponds in its properties to a precoated web.

Abstract: The invention relates to a calender intended to calender a paper or board web (4), which calander comprising a calendering section, in which there are at least two members, such as rolls (1, 2, 3), in nip contact, between which the web (4) being calendered is arranged to run. For reducing the moisture and heat leaving the web (4) while it is being calendered a wall (16, 17), covering at least part of the calendering section, is formed from the web (4) being calendered by changing its direction of travel.

Abstract: The invention relates to a method for passing a web (W) in connection with a finishing device of a paper or board machine, in which method the web (W) is passed from a preceding treatment stage to the finishing device in which the web (W) is finished in the finishing device and from which finishing device the web (W) is pased further to a subsequent treatment stage. The web (W) is brought to a roll (11; 14) of the finishing device as supported substantially before a nip area (N1; N2). The web (W) is passed from the circumference of a roll (12; 15) of the finishing device as substantially supported after the nip area (N1; N2). The invention also relates to a device for passing a web in connection with a finishing device of a paper machine.

Abstract: A roll for use in an air press assembly of a papermaking machine has a pair of ends associated therewith. The roll includes a pair of edge portions with each edge portion extending to one of the pair of ends. Each edge portion has an edge surface portion composed of a first material, the first material having a first hardness. The roll further includes a middle portion located between the pair of edge portions, the middle portion having a middle surface portion composed of a second material. The second material has a second hardness, the second material being harder than the first material. The first material is preferably a soft, seal material which promotes reduced air leakage from the air press assembly.

Abstract: A method for the production of a liner comprising at least a top layer and a base layer is provided, wherein a forming section with at least two forming units is used to create a fiber web, said fiber web being conveyed through a press section and further to a drying section, said press section comprising a number of roll nips and at least one impermeable transfer belt with at least one smooth surface, wherein said transfer belt runs through the last nip in the press section in such a manner that its top layer is pressed against said smooth surface of the transfer belt.

Abstract: An improved method and apparatus for imparting a smooth surface to gypsum fiber panels. The method involves imparting energy to the surface of a slurry as the slurry is dewatered just prior to rehydration. The apparatus used to impart the energy is a water spray including a source of pressurized water such as a pump, a distribution manifold and a plurality of nozzles to direct the water spray at the surface of the slurry. In operation, the water spray is directed against the surface of the slurry. The flow disrupts the slurry to a fraction of its total depth, thus dispersing clumps or flocs of commingled crystals and fibers in the depth that would give the surface of the finished panel a rough surface if they were allowed to remain.

Abstract: Fine paper is manufactured in a paper machine by feeding stock into a headbox (100) from a short circulation the stock volume of which has been minimized, water is removed from the paper web (W) most advantageously in a gap former (250), in the press section (300) water is pressed out of the paper web (W) in an extended nip press (360), in the dryer section (400) impingement drying (450) is employed for the drying of the paper web (W), the paper web (W) is pre-calendered in a calender (900) employing low nip loads, both surfaces of the paper web (W) are precoated at the same time, after precoating (500) the paper web (W) is dried by means of contact-free drying (660), the paper web (W) is coated in an on-line coating station/stations (700, 800), after which the paper web (W) is at least partly dried in a drying section/sections (750, 850) by means of contact-free drying of the paper web (W), and the paper web (W) is calendered in an on-line calender (900) while the linear load in each nip is regulated separat

Abstract: In the method for precalendering a paper or paperboard web (W) a web that has undergone earlier dewatering stages is calendered to attain a suitable surface for the coating process. The web is calendered (C) one-sidedly in such a manner that the absorption level of the second side (W2) of the web entering the calendering, which is higher than the absorption level of the first side (W1), is reduced in the calendering nearly to the same level or at least to the same level with the first side (W1).

Abstract: An improved method for imprinting a paper web during a wet pressing event is disclosed which results in asymmetrical protrusions corresponding to the deflection conduits of a deflection member. In one embodiment, differential velocity transfer during a pressing event serves to improve the molding and imprinting of a web with a deflection member. Improved deflection members are also disclosed. Improved tissue webs produced are also disclosed having useful sets of physical and geometrical properties, such as a pattern densified network and a repeating pattern of protrusions having asymmetrical structures.

Abstract: A process for increasing the tactile properties of a base web without adversely affecting the strength of the web is disclosed. In general, the process includes the steps of placing a base web in between a first moving conveyor and a second moving conveyor. The conveyors are then wrapped around a shear inducing roll which creates shear forces that act upon the base web. The shear inducing roll typically has a relatively small diameter. In some applications, more than one shear inducing roll may be incorporated into the system. In other applications, the shear inducing roll can also be a nip roll for decreasing the caliper of the base web. The shear inducing roll may be stationary, as in the form of a stationary shoe with a convex edge, or may rotate. In one embodiment, the shear inducing roll can rotate on an air bearing.

Abstract: Pressing arrangement having two press rolls forming at least one press nip for dewatering a web, and two dewatering belts arranged to be guided through the at least one press nip with the web. The dewatering belts positioned on opposite sides of the web to absorb water. A common guidance path, formed by the dewatering belts guiding the web, is located after the at least one press nip. A separating roll and a lower one of the dewatering belts is arranged to wrap the separating roll along with the web at an end of the common guidance path. An upper one of the dewatering belts is arranged to be guided away from the web in a separation path in a region of the separating roll. Lower dewatering belt and web wrap the separating roll subsequent to the separation path at a wrapping angle of at least about 30°.

Abstract: Uncreped throughdried tissue sheets are mechanically treated by calendering and embossing to provide a unique combination of desirable properties to the resulting sheet, which exhibits more surface uniformity, improved softness, high bulk and absorbency.

Abstract: A creped tissue paper is made by creping a tissue paper from a drying cylinder with a creping doctor, receiving the creped web on a carrying fabric, carrying the creped web on the carrying fabric through a compression nip that compresses the web to substantially reduce its thickness and improve softness of the web, and carrying the creped, compressed web on the carrying fabric or a subsequent fabric to a reel-up.

Abstract: Pressing arrangement for treating a fibrous material web that includes opposing surface and shoe press roll including non-rotationally mounted carrier, flexible pressing jacket arranged to circulate around carrier, and at least one press shoe supported on carrier. The at least one press shoe is arranged to press flexible pressing jacket against opposing surface. Shoe press roll and opposing surface are arranged to form press nip elongated in jacket travel direction, and the at least one press shoe includes outlet arranged to extend beyond, in jacket travel direction, an end of press nip. The at least one press shoe is arranged to press pressing jacket against opposing surface such that, in a region of press nip, pressing jacket is moved radially outside of a circular path formed by pressing jacket in an unstressed state, and pressing jacket is arranged to rest against a free end of outlet.

Abstract: In the method, a release layer is formed on base paper to manufacture release paper. The base paper is calendered before forming the release layer in-line on the same production line. A further object of the invention is equipment for manufacturing release paper, which equipment can be used to form a release layer on top of a base paper. The equipment comprises a calender (4) located before the release layer forming unit (5) in-line on the same production line.

Abstract: A method and an apparatus for the production and processing of a material web, specifically a paper or cardboard web are described, whereby the material web is first wound and subsequently unwound for a subsequent finishing process and whereby the material web after being wound and prior to the finishing process is remoistened so that its moisture immediately prior to the finishing process is higher than that immediately prior to winding.

Abstract: Suction box in a paper machine including a vacuum chamber, a deck or a number of substantially U-section holders open toward a wire and ribs arranged in the deck or the holders so that they can be loaded against the wire. At least in a running situation, the deck of the suction box is curved or the ribs are arranged to provide a curve run of the wire so that the wire tension of the curved run over the deck or ribs serves to lower a normal force which is produced by the vacuum present in the suction box and which is effective between the wire and the deck or ribs.

Abstract: The present invention relates to a paper tissue, and in particular to facial tissue, and disposable handkerchiefs. Claimed and described is a paper tissue comprising at least two plies, characterized in that the paper tissue has a physiological surface smoothness parameter of less than 700 microns, preferably from 650 microns to 50 microns, more preferably from 650 microns to 300 microns and in combination has a caliper per ply of more than 0.09 mm, preferably from 0.09 mm to 0.5 mm, more preferably from 0.1 mm to 0.2 mm. In one preferred embodiment a three-ply tissue with embossed middle ply is provided. Further is a related process claimed and described.

Abstract: There is disclosed a roller (10) for a texturing press on a papermaking machine adapted to be fitted with an interchangeable engraved sleeve (12) and comprising a cylindrical shell (20, 21) having a plurality of axially and circumferentially spaced apertures (23) in its peripheral surface through which pressure fluid may be ejected and at least one axially extending channel (22) within the thickness of the shell for the supply of pressure fluid to the apertures.

Abstract: Method and apparatus for fiber-reinforced mats and asphalt coated sheets for use in roofing and water resistant membranes. Mats and sheets according to the invention exhibit superior tensile strength and resistance to wrinkling. The mat aspect of the invention comprises product and method for producing mats comprised of organic matting materials such as cellulose, paper, other wood products, or felt, and reinforcing fibers such as fiberglass, plastics, and other relatively high-strength natural and synthetic fibers, the fibers being incorporated within the matting material during production of the mat. The sheet aspect of the invention comprises product and method for mats of the type described above with added asphalt coatings to improve the water-proofing qualities of the mats.

Abstract: Press section of a machine for producing a fiber material, web and process for guiding a fiber material web through the press section. The press section includes at least two double-felted presses arranged in series in a travel direction of the fiber material web. An upstream one of the at least two double-felted presses may include a deflection-controlled shoe press roll and a suction roll, and the deflection-controlled shoe press roll and the suction roll may be arranged to form an upstream press nip. The process may include guiding the fiber material web through a press nip of an upstream one of the at least two double-felted presses formed by a deflection-controlled shoe press roll and a suction roll.

Abstract: Thermoplastic fibres of different melting points are present in an aqueous slurry of refractory fibres, binder and flocculant. The slurry is passed through a screen to form a wet body which is heated to dry the body and melt the thermoplastic fibres to bind the refractory fibres together.

Abstract: A method for increasing caliper control of a fibrous web as the web is wound onto a roll is provided. The method includes winding the fibrous web containing cellulosic fiber onto the roll to form a wound product and conveying the web through a nip prior to winding the web onto the roll. The nip is configured to apply a pressure to the web to selectively decrease the caliper of the web as the web is wound onto the roll. Also disclosed is a system for controlling the caliper of the fibrous web in which a calender device forms a nip through which the fibrous web is conveyed. The system includes an adjustment device, which is configured to adjust the nip of the calender device to increase pressure on the fibrous web as the diameter of the roll increases thus increasing uniformity of the caliper of the fibrous web.

Abstract: A method for directly forming and finishing a web product is provided. The method includes forming a web on a forming apparatus, continuously transferring the formed web to a conveyor, performing a converting step on the web as the web is continuously supported and advanced on the conveyor, and finishing the web into a product substantially ready for packaging. A system for performing the method is also provided.

Abstract: In the method for manufacturing surface-treated printing paper, a paper web is first dried down to a target moisture of the surface treatment, and it is wetted again to the target moisture before the surface treatment. The rewetting to the target moisture is conducted on the web running to the surface treatment before a device effecting the surface treatment of the web, as seen in the travel direction of the web. Before re-wetting, the moisture profile of the web is adjusted in the drying section by wetting the web at a point which is located before the area of the heavy shrinkage (cd shrinkage area) in the travel direction of the web.

Abstract: Shoe roll for dewatering or calendering a moving fibrous web. The shoe roll includes a flexible, replaceable press cover having two end regions and at least one end supporting disc. At least one of the two end regions have reinforcing inlays and are releasably coupled to the at least one end supporting disc. A quick-acting closure, located between an inner wall of the at least one end region and the at least one end supporting disc, includes a radially pressing element structured to exert a pressing force and to simultaneously seal an interior of the shoe roll from an external environment. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

Abstract: The present invention is a method of making a tissue product. An aqueous suspension of papermaking fibers is deposited onto a forming fabric thereby forming a wet tissue web. The wet tissue web is transferred to a sculpted fabric having a tissue machine contacting side and a tissue contacting side. The tissue contacting side includes an upper porous member comprising a base with nonwoven elevated regions thereon. The nonwoven elevated regions comprise a first group of nonwoven raised elements and a second group of nonwoven raised elements, both raised relative to the base. The first group of nonwoven raised elements extends in at least a first direction and the second group of nonwoven raised elements extends in at least a second direction.

Abstract: The present invention is a method of making a tissue product. An aqueous suspension of papermaking fibers is deposited onto a forming fabric thereby forming a wet tissue web. The wet tissue web is transferred to a woven sculpted fabric having a tissue contacting surface. The tissue contacting surface includes at least a first group of strands and a second group of strands wherein the first group of strands extend in a first direction and the second group of strands extend in a second direction.

Abstract: The present invention is a woven sculpted fabric for the manufacture of a tissue web having a tissue contacting surface. The tissue contacting surface of the woven sculpted fabric includes at least a first group of strands and a second group of strands wherein the first group of strands extend in the cross-machine direction of the woven sculpted fabric and the second group of strands extend in the machine direction of the woven sculpted fabric.

Abstract: A tissue sheet is made using a modified wet pressing process employing an integrally sealed air press. After initial formation and conventional vacuum dewatering, the wet web may be conformed to the surface contour of a relatively coarse fabric to give the web a textured surface. By creating a pressure differential across the web, the air press noncompressively dewaters the wet web to a consistency of about 30 to about 40 percent prior to a heated drying cylinder. The web may be dried to substantially preserve its three-dimensional, throughdried-like texture. The process provides a web having an exceptionally high degree of bulk and absorbency not expected in wet-pressed products.

Abstract: A paper machine for manufacturing textured soft paper comprises a press section with a press nip, through which an impermeable belt and a felt run with the fibrous web between them, a drying cylinder and a transfer roll forming a nip for transfer of the web to the drying cylinder. According to the invention the belt is a texturing belt having a back layer and a web-contacting layer having depressions with surface portions situated between them to form a relief pattern in the web upon passage through the press nip, the texturing belt running from the press to the drying cylinder in order to carry the textured web to the transfer nip. The felt runs away from the texturing belt before a water film formed in the press nip on the texturing belt breaks up. A device is provided before the transfer nip to apply adhesive on the drying cylinder.

Abstract: A process for increasing the tactile properties of a base web without adversely effecting the strength of the web is disclosed. In one embodiment, the process includes the steps of placing a creped base web between a first moving conveyor and a second moving conveyor. The conveyors are then wrapped around a shear-inducing roll which creates shear forces and compressive forces that act upon the base web. The shear forces disrupt the web, increasing the softness and decreasing the stiffness of the web. The compressive forces are localized at the areas where the fabric knuckles contact the base web, imparting a unique fabric-imprinted pattern to the web with limited caliper reduction. The shear-inducing roll typically has a relatively small diameter. In some applications, more than one shear-inducing roll may be incorporated into the system.

Abstract: The invention relates to a method for producing a calendered paper web. According to the method, a paper web is formed from a fibrous raw material in a paper machine, and the paper web is calendered. According to the invention, a fibrous raw material is used which is at least partly made up of a chemimechanical pulp of a wood species of the Populus family, and the calendering is performed by online soft-calendering. By means of the invention, the gloss and smoothness of papers can be improved without decreasing their bulk.

Abstract: A method in a paper machine for transferring a paper web from a wet wire in a former section to a pick-up fabric or an equivalent transfer fabric of a press section, including the steps of forming a pick-up point on the wet wire and separating an edge strip from at least one edge of the web prior to the pick-up point by means of at least one cutting device. The method further includes separating the web from the wet wire and passing the web onto the pick-up fabric at the pick-up point. The method also includes applying a pressure difference to the at least one edge strip through the wet wire or the pick-up fabric at or after the pick-up point to cause the at least one edge strip to either follow the wet wire or become separated from the pick-up fabric after the pick-up point and to be placed in a broke system arranged beneath the paper machine.

Abstract: The invention relates to a press in a machine for the production or treatment of a continuously running web of cellulosic fibrous material, for instance a paper, tissue or board machine. The press includes a press device and a counter element arranged opposite the press device, which is arranged to form a press zone in the form of an extended press nip in cooperation with the press device having a certain width in the machine direction for pressing the fibrous web as it runs through the press nip.

Abstract: The invention relates to a method and arrangement for processing a wide paper or board web in connection with such a manufacturing method, in which a wide base web (14) is manufactured and the base web is processed in at least one processing stage before the separation of the finished product by cutting it transversely from the web on the production line. According to the invention, the base web (14) is divided at least once to form two part-webs (17, 18) before the separation of the finished product by cutting it transversely from the web and before the final processing stage preceding separation. At least one part-web (17, 18) formed in this manner is guided to a finishing stage before the separation of the finished product by cutting it transversely from the web on the production line.

Abstract: Press section of a machine and process for producing webs. The press section includes a shoe press including a shoe press unit and a counter roll. The shoe press unit includes at least two press shoes and an elastic liquid-impermeable press belt guided over the at least two press shoes, and the at least two press shoes have different lengths measured in a web travel direction and each of the two press shoes is arranged for movement (i.e. alternatively positionable) between an idle position and a press position facing the counter roll.

Abstract: The invention relates to a calender intended to calender a paper or board web (4), which calander comprising a calendering section, in which there are at least two members, such as rolls (1, 2, 3), in nip contact, between which the web (4) being calendered is arranged to run. For reducing the moisture and heat leaving the web (4) while it is being calendered a wall (16, 17), covering at least part of the calendering section, is formed from the web (4) being calendered by changing its direction of travel.