Abstract: A machine for dewatering and drying a paper, cardboard or other fibrous web, to which machine a fibrous stock suspension is fed which is formed at least partially from waste paper. The machine includes at least two press nips which are formed in each case by two press rolls, wherein a fibrous web runs through first press nip with a water absorbing dewatering belt on both sides. The fibrous web then runs through a second press nip with at least one other dewatering belt and a smooth impermeable transfer belt on both sides. A transfer belt transfers the fibrous web after second press nip to a belt in a downstream machine unit, e.g. dryer group. The dryer group allows the fibrous web to be guided in a serpentine manner alternatively over heated dryer cylinders and vacuum equipped guide rolls.

Abstract: A tissue product includes at least one ply with embossed protrusions defining an interior volume, the embossed protrusions including a base, a top surface and a sidewall extending from the top surface to the base, wherein the sidewall of at least 10% of the embossed protrusion is provided with an indent region shaped such that the sidewall bends towards the interior volume of the embossed protrusion.

Abstract: The thickness of accumulated fiber can be appropriately measured when accumulating and processing fiber. A measuring device includes a distributor 60 that disperses material containing fiber; a mesh belt 72 that accumulates material dispersed by the distributor 60; a roller unit 650 that compresses a second web W2 accumulated on the mesh belt 72; and a measurement device 400 that measures the thickness of the second web W2 after compression by the roller unit 650.

Abstract: The invention relates to methods and an apparatus useful to installing and removing endless belts in a conveyor system and more preferably continuous fabrics, belts, felts and webs used in the papermaking process. According to the present invention a pair of guide rolls to move a first continuous fabric from a first fabric position to a second fabric position and a second fabric from the second fabric position to the first fabric position, passing the fabrics over one another as the position of the fabrics are exchanged. The movement of the first and second fabrics may be done at the same time so as to further enhance the efficiency of changing fabrics.

Abstract: The invention relates to a method for manufacturing a printing paper product, in which method natural fibres are introduced into a system which includes a paper machine. In the method, calcium hydroxide and carbon dioxide are admixed to natural fibres, for precipitating calcium carbonate onto the surfaces of the natural fibres, and said printing machine is used for manufacturing a printing paper product which includes at least said natural fibres, with calcium carbonate precipitated on their surfaces, as a filler for said printing paper product. The invention also relates to a system for manufacturing a printing paper product. Further, the invention relates to a calendered printing paper product which has not been coated with a pigment.

Abstract: A roll covering is particularly suited for use in the press section of a machine for the production of a web of fiber-based material, for example a papermaking machine, a paperboard machine, or a tissue machine. The roll covering is arranged on a roll core which, in particular, is composed of metal or of a fiber-composite material. The modulus of elasticity of the roll covering is from 500 to 1500 N/mm2.

Abstract: Spirally wound paper products are disclosed having desirable roll bulk, firmness and softness properties. The rolled products can be made from single ply tissue webs formed according to various processes.

Abstract: Processes for making fluff pulp sheets mechanically eliminate many unwanted fiber-to-fiber bonding (fiber bundles) in the sheet. Pulp slurry is deposited on a moving bottom forming wire to form a stock web. Pulp slurry is brought into contact with a moving top forming wire. The stock web is subjected to up and down dewatering creating separately formed layers to reduce fiber-to-fiber bonding. The stock web can be subjected to strong pulsating shear forces as it is being advanced along the bottom forming wire to break fiber bundles. The pulp slurry can be deposited on the bottom forming wire utilizing a headbox with dilution control to selectively adjust the concentration of the pulp slurry. Shoe presses can be used to dewater the web after it is subjected to the pulsating shear forces.

Abstract: A carrier-tape base paper making method and the base paper made thereby fall into the technical field of papermaking. According to performance requirements, the base paper is made through pulp conditioning and papermaking, in which different pulping and auxiliary materials for surface, intermediate and bottom layers are added. The method includes such steps as beating, conditioning, papermaking, calendering and reeling. The carrier-tape base paper features high strength, perfect waterproof and bonding performance, limited physical damages to electronic elements and satisfactory resilience.

Abstract: A nonwoven web of unmodified or cyanoethylated nanocellulose was found to have greater strength than kraft paper after immersion in oil at high temperature, making it useful as an insulation material for transformers. A mixture of nanocellulose and polymetaphenylene isophthalamide has further improved properties for use as an insulating material.

Abstract: The invention relates to a process for the production of paper, card and board, including the steps of draining a filler-containing paper stock, having a certain fibrous concentration and containing at least one water-soluble amphoteric copolymer, with sheet formation in a wire section, then pressing the paper in a press section, diluting the paper stock to a fibrous concentration in the range from 5 to 15 g/l, draining the diluted paper stock to form a sheet, and then pressing the sheet in the press section to a solids content G(x) wt % or greater, such that G(x) computes according to: G(x)=48+(x?15)·0.4, where x is the numerical value of a filler content of the dry paper, card or board (in wt %), and G(x) is a numerical value of the minimal solids content (in wt %) to which the sheet is pressed.

Abstract: A method to dewater a fibrous web includes directing the fibrous web through a first press zone defined between a revolving permeable belt and a revolving permeable support belt and having a first press zone length. The fibrous web is arranged lying between the revolving permeable belt and the revolving permeable support belt. A fluid is caused to flow through the permeable belt, the fibrous web and the support belt at least over a section of the first press zone length. The fibrous web is dewatered in a second press zone following the first press zone and defined between the revolving permeable belt and the revolving permeable support belt, the second press zone having a second press zone length. The fibrous web is led through the second press zone between the permeable belt and the support belt, the permeable belt and the support belt each having a different compressibility.

Abstract: An arrangement for treating a fiber web, in particular for sizing paper and board web (W), using a sizer (10) which has sizing equipment (3, 4) located on both sides of the web (W) and size press rolls (5, 6) located on both sides of the web (W) in between of which a size nip is formed. The web (W) when approaching the sizer (10) is first guided past the size nip of the sizer (10) in a process direction (D) and then is turned into an opposite direction (OD) in relation to the process direction (D) by at least one turning guide roll (15) such that the top side (TS) of the web (W) is sized by sizing equipment (4) located below the web (W).

Abstract: A method of manufacturing coated paper which consistently performs a papermaking process, a coating process, and a flattening process and includes a coating facility formed of a combination of a roll coater coating facility and first and second coating facilities in which coating methods are different from that of the roll coater coating facility, and the roll coater coating facility is provided between the first and second coating facilities.

Abstract: A method for forming a web of transversely extensible fibrous material includes the steps of subjecting a fluid-permeable endless conveyor belt of elastic material, of thickness increasing from its longitudinal axis to its edges, to a localized transverse stretching operation, achieved by temporarily withdrawing a longitudinal band thereof from the surface on which it naturally slides and maintaining it in contact, in this stretched condition, with at least a part of the surface of a support member; depositing a web of pliable fibrous material having a liquid content between 3% and 70% by weight against that portion of the conveyor belt of elastic material which has been transversely stretched; and with vacuum, maintaining the web of pliable fibrous material adhering to the conveyor belt of elastic material during its return to its original configuration, to cause the transverse contraction of the web and the simultaneous partial removal of liquid therefrom.

Abstract: A method of making a fabric-creped absorbent cellulosic sheet with improved dispensing characteristics. The method includes compactively dewatering a papermaking furnish to form a nascent web, applying the nascent web to a translating transfer surface, fabric-creping the web from the transfer surface at a consistency of from about 30 to about 60 percent utilizing a patterned creping fabric, the fabric-creping step occurring under pressure in a fabric creping nip defined between the transfer surface and the creping fabric, wherein the fabric is traveling at a fabric speed that is slower than the speed of the transfer surface, the web being creped from the transfer surface and transferred to the creping fabric, adhering the web to a drying cylinder with a resinous adhesive coating composition, drying the web on the drying cylinder to form a dried web, and peeling the dried web from the drying cylinder.

Abstract: An arrangement for treating a fiber web, in particular for sizing paper and board web (W), using a sizer (10) which has sizing equipment (3, 4) located on both sides of the web (W) and size press rolls (5, 6) located on both sides of the web (W) in between of which a size nip is formed. The web (W) when approaching the sizer (10) is first guided past the size nip of the sizer (10) in a process direction (D) and then is turned into an opposite direction (OD) in relation to the process direction (D) by at least one turning guide roll (15) such that the top side (TS) of the web (W) is sized by sizing equipment (4) located below the web (W).

Abstract: Processes for making fluff pulp sheets mechanically eliminate many unwanted fiber-to-fiber bonding (fiber bundles) in the sheet. Pulp slurry is deposited on a moving bottom forming wire to form a stock web. Pulp slurry is brought into contact with a moving top forming wire. The stock web is subjected to up and down dewatering creating separately formed layers to reduce fiber-to-fiber bonding. The stock web can be subjected to strong pulsating shear forces as it is being advanced along the bottom forming wire to break fiber bundles. The pulp slurry can be deposited on the bottom forming wire utilizing a headbox with dilution control to selectively adjust the concentration of the pulp slurry. Shoe presses can be used to dewater the web after it is subjected to the pulsating shear forces.

Abstract: The present disclosure provides tissue webs with improved durability produced by rewetting a dried tissue web, pressing the rewetted web and drying the web for a second time. This improved durability is manifested by a high cross-machine direction (CD) slope.

Abstract: The present disclosure provides tissue webs with improved durability produced by rewetting a dried tissue web, pressing the rewetted web and drying the web for a second time. This improved durability is manifested by a high cross-machine direction (CD) slope.

Abstract: A method to dewater a fibrous web includes directing the fibrous web through a first press zone defined between a revolving permeable belt and a revolving permeable support belt and having a first press zone length. The fibrous web is arranged lying between the revolving permeable belt and the revolving permeable support belt. A fluid is caused to flow through the permeable belt, the fibrous web and the support belt at least over a section of the first press zone length. The fibrous web is dewatered in a second press zone following the first press zone and defined between the revolving permeable belt and the revolving permeable support belt, the second press zone having a second press zone length. The fibrous web is led through the second press zone between the permeable belt and the support belt, the permeable belt and the support belt each having a different compressibility.

Abstract: A method for preparing aramid insulating paper, includes the operations of: providing aramid pulp slurry and aramid short fiber slurry at respective desired concentrations; blending, beating and fluffing the aramid pulp slurry and the aramid short fiber slurry in a given ratio to afford a paper pulp at a desired concentration; transiting the paper pulp to a papermaking machine fitted with a head box to form and make wet paper sheets; pressing to dewater the wet paper sheets and drying the dewatered paper sheets; and calendering the dried paper sheets at a high temperature to obtain the aramid insulating paper, wherein in operation iii), at least one ultrasonic generator is mounted on the head box to apply directional ultrasonic waves to the paper pulp flowing through the heat box. The aramid insulating paper prepared according to the method of the invention has enhanced strength, smoothness and uniformity.

Abstract: A pressing arrangement including at least one first fabric and second fabric both being permeable. A paper web is disposed between the first fabric and the second fabric. A pressure producing element is in contact with the first fabric. A support surface of a supporting structure is in contact with the second fabric. A differential pressure is provided between the first fabric and the support surface that acts on the first fabric, the paper web, and the second fabric, whereby the paper web is subjected to mechanical pressure and experiences a predetermined hydraulic pressure so as to cause water to be drained from the paper web. The pressing arrangement is structured and arranged to allow air to flow in a direction from the first fabric through the paper web and through the second fabric.

Abstract: Treatment liquid is sprayed onto a fibrous web surface by one or more spray boxes (21, 11, 23) having a spray chamber (4) and spray nozzles (1) in the travel direction of the fibrous web before a nip (N1 . . . N7; N8; N9) formed between them by two nip means (11 . . . 18) provided with a movable surface, and air and/or treatment medium mist is removed from the spray chamber and after having added treatment liquid the fibrous web is pressed in this nip. The spray chamber (4) is formed between a first spray box (21, 11, 23; 24; 25) and any successive first nip means (13; 52, 53; 62, 63) and second nip means (13; 52, 53; 62, 63), the fibrous web is guided supported by the surface of the first nip means to the spray chamber and the fibrous web is supported thereon during the spraying of treatment liquid.

Abstract: The present disclosure is generally directed to a multiple ply tissue product that includes a first ply and a second ply. The first ply includes a first outwardly facing layer having hardwood fibers, a second layer having softwood fibers, and a third layer having at least about 10 percent by weight post-consumer recycled fiber, wherein the second layer is positioned between the first layer and the third layer.

Abstract: The present invention provides tissue products having increased CD stretch, which may be manufactured using a process in which the nascent web is subjected to two distinct rush transfers. The first rush transfer occurs when the web is transferred from the forming fabric to the transfer fabric, i.e., the “first position,” and the second occurs when the web is transferred from the transfer fabric to the through-air drying fabric (TAD) fabric, i.e., the “second position.” The overall speed differential between the forming fabric and the TAD fabric may be, for example, from about 10 to about 50 percent, with the amount of rush transfer being divided between the first and second position in a manner sufficient to achieve the desired CD stretch and other sheet properties.

Abstract: Conductive nonwoven webs are disclosed. The nonwoven webs contain pulp fibers combined with conductive fibers. In one embodiment, the webs are made in a wetlaid tissue making process.

Abstract: Conductive nonwoven webs are disclosed. The nonwoven webs contain pulp fibers combined with conductive fibers. In one embodiment, the webs are made in a wetlaid tissue or paper making process. The pulp fibers contained in the webs may comprise softwood fibers, while the conductive fibers may comprise carbon fibers. Base webs can be produced having a resistance of less than about 100 Ohms/square in one embodiment. Once produced, the conductive material can be cut into slits that are then wound on spools. From the spools, the conductive slits can be fed into a process for making any suitable product.

Abstract: The specification discloses a method for making a paper material having a reduced tendency to cut human skin. The method includes providing a papermaking furnish containing cellulosic fibers and from about 0.5 to about 5.0 wt % by weight dry basis expandable microspheres, forming a paperboard web from the papermaking furnish, drying the web, and calendaring the web to a caliper of from about 11.0 to about 18.0 mils and a density ranging from about 7.0 to about 12.0 lb/3000 ft2/mil. Papers formed according to the method and articles formed therefrom are also disclosed.

Abstract: The invention relates to a process for manufacturing an absorbent sheet comprising at least two plies of cellulose wadding, consisting in combining said plies under pressure by passing between two steel cylindrical components, the first being smooth on the outside and the second being equipped with raised components on the outside and the hardness of the first cylindrical component being lower than that of the second cylindrical component. According to the invention, the first cylindrical component has a treated hardened surface layer and a deformable underlayer; the second cylindrical component has a hardened outer surface, and the sheet, when it passes between the two cylindrical components is compressed at a specific pressure between 40 and 250 N/mm2. Another subject of the invention is an assembly of steel cylindrical components intended for the manufacture of multiply absorbent sheets.

Abstract: Disclosed is an apparatus for drying a fibrous web, in particular a paper web, paperboard web or tissue web, by way of hot air, on which the fibrous web is charged with the supply air for the drying from a supply air chamber and on which exhaust air from the drying operation passes into an exhaust air chamber, whereby the exhaust air from the exhaust air chamber is supplied at least partly to the suction side of a pressure booster and at least a part of the supply air from the pressure side of the pressure booster is supplied to the supply air chamber.

Abstract: Treatment liquid is sprayed onto a fibrous web surface by one or more spray boxes (21, 22, 23) having a spray chamber (4) and spray nozzles (1) in the travel direction of the fibrous web before a nip (N1 . . . N7; N8; N9) formed between them by two nip means (11 . . . 18) provided with a movable surface, and air and/or treatment medium mist is removed from the spray chamber and after having added treatment liquid the fibrous web is pressed in this nip. The spray chamber (4) is formed between a first spray box (21, 22, 23; 24; 25) and any successive first nip means (13; 52, 53; 62, 63) and second nip means (13; 52, 53; 62, 63), the fibrous web is guided supported by the surface of the first nip means to the spray chamber and the fibrous web is supported thereon during the spraying of treatment liquid.

Abstract: A multi-ply tissue includes a first cellulosic embossed ply having an emboss pattern applied over a portion of its surface and a second cellulosic embossed ply of tissue. The first ply is contact laminated to the second ply so that the primary adhesion between the plies of tissue is the result of contact between cellulosic fibers. The first and second plies contact one another in contact areas, with the contact areas between the first and second plies defining compliant voids. The contact areas between the first ply and the second ply are elongated and/or rounded contact areas.

Abstract: The invention relates to a method for the production of a web of tissue paper, comprising the steps of: depositing a layer of an aqueous suspension of papermaking fibers on at least one forming fabric; reducing the water content of said layer until the amount in weight of the fibers in said layer is brought up to a first value; wet-embossing said layer in a nip between a pair of embossing rollers; and drying said embossed layer using a drying system to form a web of tissue paper.

Abstract: The invention relates to a method for the production of a web of tissue paper, comprising the steps of: depositing a layer of an aqueous suspension of papermaking fibers on at least one forming fabric; reducing the water content of said layer until the weight percentage of fiber in said layer is brought up to a first value; wet-embossing said layer in a nip between a pair of embossing rollers; and drying said layer to form a web of tissue paper.

Abstract: The object of the invention is an arrangement and a method for controlling underpressure in the drying section of a paper machine or the like in connection with a pocket space between two drying cylinders and one turn roll. The object of the invention is also a runnability component in a paper machine or the like, such as a board or a finishing machine. The runnability component comprises an entry side, a lower part and an exit side, which are in contact with each other and delimit the volume of a box-like runnability component, and a sealing element, which is arranged in connection with the entry side surface and which divides the surface into a first part and a second part. The runnability component is provided with a channel, which extends from the first part of the entry side surface to its second part and connects them.

Abstract: Method of drying a paper web in a press arrangement. The method includes moving the paper web, disposed between at least one first fabric and at least one second fabric, between a support surface and a pressure producing element and moving a fluid through the paper web, the at least one first and second fabrics, and the support surface. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: The invention relates to an arrangement and a method of a paper machine or the like for saving energy in the drying section. According to the invention, in the drying section of a paper machine or the like in connection with a pocket space (9) between two drying cylinders (1, 2) and one turn roll (3), there are the following delimiting said pocket space (9): a first drying cylinder (1), a second drying cylinder (2), a turning suction roll (3) and a wire (5, 5a, 5b), which is arranged to travel from the first drying cylinder (1) to the turning suction roll (3) and from there on to the second drying cylinder (2). The arrangement further comprises a box-like runnability component (10) and a sealing element (19) arranged in the lower part of the runnability component (10), in the gap between the runnability component and the turning suction roll (3) in order to seal said gap and thereby to promote the operation of the turning suction roll (3).

Abstract: System for drying a tissue or hygiene web. The system includes a permeable structured fabric carrying the web over a drying apparatus. A permeable dewatering fabric contacts the web and is guided over the drying apparatus. A mechanism is used to apply pressure to the permeable structured fabric, the web, and the permeable dewatering fabric at the drying apparatus. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: A method for producing a deep-nested embossed product is disclosed. The method comprises the steps of: a) providing an embossing apparatus having mating first and second embossing members; b) providing the first embossing member with a plurality of discrete embossing elements in a non-random pattern; c) providing the second embossing member with at least one linear embossing element; d) coordinating the at least one linear embossing element with the non-random pattern of first embossing elements; e) aligning the first embossing member and the second embossing member so that the non-random pattern of first embossing elements nest with the at least one linear embossing element to an engagement depth of greater than about 0.01 mm; f) providing one or more plies of material to the embossing apparatus; and, g) passing the one or more plies of the material between the first and second embossing members to produce the deep-nested embossed product.

Abstract: A belt for use in a long nip press having an arcuate pressure shoe. The belt has at least one layer having a polymer resin coating on at least one surface thereof. The resin coating has a plurality of grooves arranged therein and wherein a number of the grooves has a length less than a length of the arcuate pressure shoe to reduce ingoing nip spray.

Abstract: A device for drainage of a pulp web, particularly a tissue web, having a first pressing zone having a first pressing zone length through which the pulp web is fed horizontally between a circulating, permeable band and a circulating, permeable support band. The first pressing zone is designed such that a fluid can flow through the band, the pulp web and the support band at least on one part of the first pressing zone length. In addition, the device has a subsequent second pressing zone having a second pressing zone length. The pulp web is guided through the second pressing zone between two bands having differing compressibility.

Abstract: A support body for an apparatus having an extended nip formed between the support body and a counter-pressure member, having a working surface, being elastically deformable, and comprising a plurality of pressure chambers pressurized for controlled expanding in the direction of the working surface in order to load the nip. According to the invention the support body comprises a plurality of reinforcing profiles disposed in at least one chamber of the pressure chambers, the interiors of the profiles being in fluid communication with one another via holes, a wall of the profile facing said working surface including holes for communicating fluid between the interior of the profile and the chamber in which said profile is located, said profiles providing an inner support to walls defining said at least one chamber.

Abstract: The present invention aims to provide a cast-coated paper having good sheet gloss, printability and productivity and a process for preparing it. Herein disclosed is a cast-coated paper obtained by applying a cast coating layer comprising a pigment and an adhesive on a base paper, and pressing and drying the cast coating layer in the wet state against a heated mirror finishing surface to finish it, characterized in that the cast coating layer contains 50 parts by weight or more of a kaolin having a particle size distribution containing 65% by volume or more of particles in the range of 0.4-4.2 ?m per 100 parts by weight of inorganic pigments and further contains a plastic pigment; as well as a process for preparing it.

Abstract: The invention relates to a process for manufacturing an absorbent sheet comprising at least two plies of cellulose wadding, consisting in combining said plies under pressure by passing between two steel cylindrical components, the first being smooth on the outside and the second being equipped with raised components on the outside and the hardness of the first cylindrical component being lower than that of the second cylindrical component. According to the invention, the first cylindrical component has a treated hardened surface layer and a deformable underlayer; the second cylindrical component has a hardened outer surface, and the sheet, when it passes between the two cylindrical components is compressed at a specific pressure between 40 and 250 N/mm2. Another subject of the invention is an assembly of steel cylindrical components intended for the manufacture of multiply absorbent sheets.

Abstract: A process for manufacturing an embossed paperboard comprising the steps of: forming a wet mat including more than 60 wt % of cellulose fibers; pressure molding, with at least one embossing roll, the wet mat having 20 to 70 wt % solid to create a nested surface texture thereon; and drying the embossed wet mat to obtain the embossed paperboard with a grammage ranging between 125 and 1500 grams per square meter.

Abstract: A tissue papermaking machine is described, comprising a wet section (2) and a press section (3) comprising a single press (11) with first and second press elements (12, 13) forming a press nip (N1), and with a press felt (17) running through the press nip in contact with the formed fibre web (1?), whereby the second press element is arranged inside the loop of the press M felt, and a smooth belt (14) runs through the press nip in contact with the formed fibre web, whereby the first press element is arranged inside the loop of the belt, and a transfer roll (16) arranged inside the loop of the belt forming a transfer nip (N2) with a drying surface (20), whereby the smooth belt carries the fibre web between the press nip and the transfer nip. Furthermore, the machine has a dry section (4) for final drying of the fibre web (1?).

Abstract: This invention relates to a method for the production of a tissue paper web, which is produced from a pulp suspension having fibers. The method according to the present invention is characterized in that the pulp suspension is formed, at least partly by, a pulp suspension fraction obtained through the treatment of old paper, has a refining degree of less than 30° SR and is of such condition that a laboratory sheet according to TAPPI 205 SP 95 (Rapid Köthen), whose breaking length measured according to TAPPI 220 and TAPPI 494 is 4.0 km or more, is produced therefrom.

Abstract: A fabric for a papermaking machine that includes a machine facing side and a web facing side including pockets formed by warp and weft yarns is provided. Each pocket is defined by four sides on the web facing side, each of the four sides is formed by a knuckle of a single yarn that passes over only two consecutive yarns to define the knuckle.

Abstract: A laminate comprising aramid paper containing aramid fiber and aramid pulp and polyester film, the aramid paper and polyester film having been subjected to plasma surface treatment before laminating, wherein the aramid paper and polyester film are continuously bonded to each other. The disclosure is concerned with a process for manufacturing the laminate and an apparatus for manufacturing the laminate.