WO2001000925A1 - Appareil et procede permettant de fabriquer du papier de soie texture - Google Patents

Appareil et procede permettant de fabriquer du papier de soie texture Download PDF

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Publication number
WO2001000925A1
WO2001000925A1 PCT/SE2000/000925 SE0000925W WO0100925A1 WO 2001000925 A1 WO2001000925 A1 WO 2001000925A1 SE 0000925 W SE0000925 W SE 0000925W WO 0100925 A1 WO0100925 A1 WO 0100925A1
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WO
WIPO (PCT)
Prior art keywords
paper web
dryer
fabric
drying
web
Prior art date
Application number
PCT/SE2000/000925
Other languages
English (en)
Inventor
B. E. Ingvar Klerelid
Anders T. Linden
Lars B. Nilsson
Original Assignee
Valmet-Karlstad Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valmet-Karlstad Ab filed Critical Valmet-Karlstad Ab
Publication of WO2001000925A1 publication Critical patent/WO2001000925A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/181—Drying webs by hot air on Yankee cylinder
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/006—Making patterned paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D21F11/145—Making cellulose wadding, filter or blotting paper including a through-drying process
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/02—Drying on cylinders
    • D21F5/04—Drying on cylinders on two or more drying cylinders
    • D21F5/042—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices
    • D21F5/044—Drying on cylinders on two or more drying cylinders in combination with suction or blowing devices using air hoods over the cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/182—Drying webs by hot air through perforated cylinders
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the present invention relates to paper making and, more particularly, to apparatus and methods for making textured tissue paper.
  • tissue products such as bath and facial tissue to be soft and absorbent.
  • Softness and absorbency are affected by a number of factors, but two important factors contributing toward these characteristics are the degree of bulk or density of the paper, and the surface texture of the paper. Higher bulk generally contributes toward improved softness and absorbency, all other factors being equal.
  • the perceived softness of the tissue paper is also affected by the surface texture, with smoother surface textures generally being perceived as harsher to the touch, while knuckle-patterned surface textures or the like are generally perceived as having a softer feel.
  • the degree of bulk of a tissue web is inversely related to the degree of compaction of the web during its manufacture, and particularly to the degree of compaction of the web when it is relatively wet. Generally, the less the web is pressed while wet, the greater the bulk of the resulting tissue paper. Accordingly, if bulk were the only factor of importance in the manufacture of tissue, drying of the web would ideally be carried out entirely through non-compacting techniques. However, high speed, energy efficiency, and machine size are also important considerations in the manufacture of all types of paper including tissue.
  • press-type dewatering devices and non- evaporative dewatering devices consume relatively small amounts of energy compared to evaporative or thermal drying devices such as through-air dryers, and also are typically smaller than thermal dryers, particularly through-air dryers.
  • thermal drying is typically required for final drying of the web prior to winding the web onto a roll.
  • tissue paper produced in accordance with the '776 patent is of high quality and has good softness and high bulk, the machine speeds achievable with the process tend to be low because the drying rate is low. Accordingly, it would be desirable to provide a tissue making apparatus and method capable of making high- quality tissue paper of good softness and high bulk while operating at higher machine speeds than those achievable with the apparatus and methods of the '776 patent.
  • pressing is a relatively energy-efficient process for non- thermal or mechanical dewatering of the relatively wet web, and can reduce the moisture load imposed on the later evaporative drying devices, but pressing has a deleterious effect on bulk.
  • U.S. Patent Nos. 5,776,307 and 4,309,246 each describes tissue making apparatus and methods in which a tissue paper web is carried through a press nip between an imprinting fabric and a dewatering felt for imprinting and dewatering the web.
  • evaporative drying is performed after the pressing step by means of a through-air dryer, and final drying and creping are performed in a Yankee dryer.
  • the through-air dryer requires a large amount of space and consumes a large amount of energy.
  • the large energy consumption of the through-air dryer is in part a result of the relatively high resistance to air flow through the paper web when the paper web has a relatively low dryness, as would typically be the case for a web leaving a press-type dewatering device.
  • vacuum boxes acting in conjunction with air or steam jets suction and blow air and/or steam through the web and imprinting fabric to remove water from the web prior to or after the pressing and imprinting step, and final drying and creping are performed after the pressing and imprinting step in a Yankee dryer.
  • the web entering the Yankee dryer is said to have a dryness of about 20 to 38 percent, and hence a large thermal load is imposed on the Yankee dryer in order to finally dry the paper web to the desired dryness of 92 to 98 percent.
  • one of the problems inherent in machines that form textured tissue and dry the tissue on a heated cylinder is that the knuckled pattern of the tissue surface results in reduced web surface area in contact with the cylinder, thereby reducing the heat transfer between the web and the heated cylinder. Accordingly, drying capacity of the Yankee dryer may be reduced, and thus, all other factors being equal, a larger-capacity Yankee dryer may be required in order to achieve the requisite dryness leaving the Yankee dryer.
  • a further drawback associated with some machines, particularly those employing a Yankee dryer for final drying of a paper web, is that insufficient pre- drying of the web is performed before the web is transferred from the texturing fabric to pass through subsequent drying devices.
  • the textured pattern of the web can be degraded in subsequent drying operations because the relatively high moisture content of the web allows rearrangement of the fibrous structure of the web.
  • the passage of the web through the nip between a transfer roll and the heated cylinder of a Yankee dryer can cause compaction of the web and degradation of its surface texture pattern, and the degradation in texture tends to be worsened by higher moisture content of the web entering the nip.
  • a papermaking machine capable of achieving a higher dryness of the paper web entering the final drying device, so that a reduced thermal load and increased capacity of the final drying device can be achieved. Furthermore, it would be desirable to provide a machine capable of forming a textured paper web and drying the paper web to a relatively high dryness while still supported on a texturing fabric. It would also be desirable to provide a machine that avoids or reduces the degree of compaction of the textured paper web during pre-drying and drying operations.
  • a tissue paper web coming from the forming section is accomplished by a unique combination of pressing the paper web against a texturing fabric in a pressing device to dewater and texture the paper web, followed by pre-drying the textured paper web in a non-through-air pre-dryer operable to pre-dry the paper web without causing substantial penetration of heated gaseous fluid through the paper web. Accordingly, a fan power requirement of the pre-dryer can be reduced relative to a through-air pre-drying process, since air or other heated gaseous fluid is not passed through the web.
  • non-through-air pre-dryer devices can be used in connection with the present invention, including rotary and non-rotary impingement pre-dryers, infrared pre-dryers, and other devices capable of thermally drying the paper web without causing substantial penetration of heated gaseous fluid through the web.
  • the pre-dryer comprises an impingement pre-dryer operable to impinge a surface of the paper web with a heated gaseous fluid while not penetrating through the web.
  • the impingement pre- dryer advantageously includes a support device having a support surface on which the paper web is supported, and a blowing device disposed proximate the support device and operable to direct a stream of heated gaseous fluid against the paper web on the support device.
  • the impingement pre-dryer is a rotary type device having a rotatable vacuum roll with a foraminous mantle about which the texturing fabric is looped, the texturing fabric transporting the paper web through the pre-dryer with the texturing fabric disposed against the foraminous mantle and the paper web supported on an outer surface of the texturing fabric.
  • the vacuum roll advantageously exerts a vacuum having a magnitude less than a break-through vacuum above which the heated gaseous fluid is suctioned through the paper web into the interior of the vacuum roll, such that the heated gaseous fluid impinges on the paper web without penetrating all the way through it.
  • the vacuum exerted by the vacuum roll is only for the purpose of ensuring a safe web run so that the web remains on the roll without dropping off at any point. Thus, if in a particular application no vacuum is needed to ensure a safe web run, then a solid roll can be used instead of a vacuum roll.
  • the blowing device advantageously comprises a nozzle system that directs heated air or other gaseous fluid against the paper web.
  • the impinging fluid is reflected by the paper web.
  • the impingement pre-dryer includes an enclosure or hood system that partially surrounds the support device and collects the fluid after it has impinged on the paper web.
  • the impingement dryer preferably is an integrated hood-type impingement dryer having burners and blowers built into the hoods.
  • the pre-dryer can comprise a non-rotary impingement drying device as described in commonly owned U.S. Patent No. 5,845,415, the entire disclosure of which is incorporated herein by reference.
  • Such impingement drying device includes an enclosure containing one or more blow boxes disposed on one side of a fabric and an impingement dryer disposed on an opposite side of the fabric adjacent the paper web.
  • the blow box or boxes support the paper web and fabric as they travel generally linearly through of the device.
  • a final dryer follows the pre-dryer for final drying of the paper web.
  • the final dryer comprises a Yankee dryer having a rotatable heated cylinder adapted to support the paper web wrapped partially thereabout.
  • the texturing fabric loop has a transfer roll for transferring the paper web from the texturing fabric onto the heated cylinder.
  • the transfer roll is operable to exert a relatively light pressure against the heated cylinder sufficient to transfer the paper web onto the heated cylinder while substantially preventing degradation in the texturing of the paper web.
  • the pre-dryer compensates for reduced heat transfer between the web and cylinder that may be caused by the reduction in contact surface area between the cylinder and the textured surface of the web, such that the drying capacity of the Yankee dryer can be increased. Additionally, degradation in the texturing of the web caused by pressure exerted in the nip tends to be minimal because a light pressing is used and the web has a higher dryness than would otherwise be the case if no pre-drying in accordance with the invention were performed.
  • the final dryer comprises a through-air dryer that includes a rotatable dryer roll having a porous mantle.
  • the texturing fabric is looped about the dryer roll for carrying the paper web through the through-air dryer.
  • the through-air dryer passes heated air through the paper web and texturing fabric and through the porous mantle for thermally drying the paper web.
  • the pre-dryer facilitates a reduction in the energy usage in the through-air dryer, relative to a machine not employing pre-drying, by increasing the dryness of the web entering the through-air dryer such that the resistance to air passing through the web and the moisture load on the through-air dryer are reduced. Furthermore, drying the web while supported on the texturing fabric tends to preserve the texturing of the web.
  • the texturing fabric and pressing device can be arranged in various ways with respect to the forming section of the machine and the pre-dryer.
  • the forming section forms a wet paper web on a forming fabric, and the paper web is transferred from the forming fabric onto the texturing fabric upstream of the pressing device.
  • the texturing fabric carries the paper web through the pressing device and through the impingement pre-dryer.
  • the forming section forms the paper web on the texturing fabric, which then carries the web through the pressing device and pre-dryer.
  • the paper web is formed on a forming fabric and transferred onto a texturing fabric, and the texturing fabric carries the web through the pressing device.
  • the web is then transferred from the texturing fabric onto a pre-drying fabric, which transports the web through the pre-dryer.
  • the pre-drying fabric can transfer the web onto a heated cylinder by means of a transfer roll, or the pre-drying fabric can transport the web through a through-air dryer for final drying of the web.
  • the pressing device can be any of a number of types, including a roll press or an extended nip shoe press. If additional drying capacity is desired, the pressing device can include a heating element for causing thermal drying of the paper web in the nip.
  • the pressing device advantageously provides an outgoing web dryness of about 25 to about 40 percent.
  • the tissue making apparatus and methods of the invention are capable of making high-bulk tissue paper of similar quality to paper produced on tissue machines that employ through-air dryers for drying the paper web.
  • Use of a single texturing fabric to transport the web through the pressing device and pre-dryer and up to or through the final dryer helps preserve the textured surface of the paper.
  • the pre-dryer facilitates improved production capacity for a given final dryer by increasing the dryness of the web entering the final dryer, and also compensates for the reduced heat transfer in a Yankee dryer that may be caused by the reduction in contact area of the textured web surface.
  • FIG. 1 is a schematic side elevation of a paper making apparatus in accordance with a first preferred embodiment of the invention
  • FIG. 2 is a schematic side elevation of a paper making apparatus in accordance with a second preferred embodiment of the invention
  • FIG. 3 is a schematic side elevation of a paper making apparatus in accordance with a third preferred embodiment of the invention
  • FIG. 4 is a schematic side elevation of a paper making apparatus in accordance with a fourth preferred embodiment of the invention.
  • FIG. 5 is a schematic side elevation of a paper making apparatus in accordance with a fifth preferred embodiment of the invention.
  • FIG. 6 is a schematic side elevation of a paper making apparatus in accordance with a sixth preferred embodiment of the invention.
  • FIG. 7 is a schematic side elevation of a paper making apparatus in accordance with a seventh preferred embodiment of the invention.
  • FIG. 8 is a schematic side elevation of a paper making apparatus in accordance with an eighth preferred embodiment of the invention.
  • a paper making apparatus in accordance with a first preferred embodiment of the invention is broadly designated with the reference numeral 10.
  • the apparatus 10 includes a forming section 12 for forming a wet paper web, a press section 14 for partially dewatering and texturing the web, a pre-drying section 16 for pre-drying the web, and a final drying section 18 for final drying of the web.
  • the forming section 12 can be of various types, including single-wire and twin-wire types.
  • the forming section 12 comprises a C-former or crescent former having a forming roll 20 and an inner forming fabric 22 and an outer forming fabric 24 that are wrapped partially about the forming roll 20.
  • the inner forming fabric 22 forms a continuous loop about a plurality of guide rolls 26 (only one shown) and is driven by a suitable drive roll (roll 20 and/or roll 26, for example), and the forming roll 20 is disposed inside the loop of the inner forming fabric.
  • the outer forming fabric 24 forms a continuous loop about a plurality of guide rolls 28 and a breast roll 30, and the forming roll 20 is outside the loop of the outer forming fabric 24.
  • a headbox 32 is operable to deposit a slurry of paper-forming stock between the inner and outer forming fabrics 22 and 24 so as to form a wet paper web therebetween.
  • the outer forming fabric 24 diverges from the paper web and inner forming fabric 22 at a point generally where the paper web leaves the forming roll 20, and the inner forming fabric 22 carries the paper web downstream to a transfer point where the paper web is transferred from the inner forming fabric 22 onto a texturing fabric 34.
  • the texturing fabric 34 forms a continuous loop, guided by a plurality of guide rolls 36 (one shown) and also by various components of the pre-dryer section 16 as further described below.
  • the texturing fabric 34 transports the paper web through the press section 14 and pre-drying section 16 and up to the final drying section 18.
  • the texturing fabric 34 can be of various constructions and surface configurations.
  • the loop of the texturing fabric 34 is adjacent to the loop of the forming fabric 22, the two fabrics becoming tangent at a transfer point 38 where the forming fabric is turned by a guide roll 26 so as to diverge from the direction of travel of the texturing fabric 34. Accordingly, the paper web is transferred from the inner forming fabric 22 onto the texturing fabric 34 at the transfer point.
  • Various types of devices can be used to facilitate transfer of the web onto the texturing fabric 34, including transfer suction boxes, air or steam jets, and other devices known in the art.
  • the press section 14 includes a pressing device 40 having a pair of press elements 42 and 44 that form a nip 46 between them.
  • the illustrated pressing device 40 is a shoe press (press element 42 being a counter roll and press element 44 being a press shoe), but other types of pressing devices capable of exerting controlled pressure on the paper web can be used instead. For instance, a roll press can alternatively be used in place of the shoe press.
  • the texturing fabric 34 carrying the paper web is arranged to pass through the nip 46.
  • a dewatering felt 48 is also arranged to pass through the nip 46 such that the paper web is disposed between the texturing fabric 34 and the dewatering felt 48.
  • the dewatering felt 48 forms a continuous loop about a plurality of rolls 50.
  • the pressing device 40 is operable to press the paper web between the texturing fabric 34 and the dewatering felt 48 so that water is squeezed from the paper web into the felt 48.
  • the pressing device 40 may optionally include a heating element 45 operable for causing thermal drying of the paper web.
  • the pressing device 40 dewaters the web to a dryness of about 25 to about 40 percent, and more typically about 30 to 35 percent.
  • the paper web is forced to conform to the textured surface of the texturing fabric 34.
  • the paper web is simultaneously dewatered and textured in the pressing device 40.
  • a typical linear nip load is about 70 to about 150 kN/m; where the pressing device 40 is a shoe press, a typical linear nip load is about 500 to about 1200 kN/m.
  • the texturing fabric 34 transports the paper web through the pre-drying section 16 such that the paper web is pre-dried while supported on the texturing fabric, thus helping to preserve the texturing of the paper web.
  • pre-drying devices can be used, including impingement pre-dryers, infrared pre-dryers, microwave pre-dryers, or combinations thereof.
  • the pre-drying section 16 comprises an impingement pre-dryer 52.
  • the pre-dryer 52 includes a non-heated vacuum roll 54 having a cylindrical foraminous mantle 56 through which suction is applied by a suitable vacuum system (not shown) to retain the paper web wrapped partially about the vacuum roll.
  • the vacuum roll 54 is partially enclosed by a housing or hood system formed as a pair of hood halves 58 that engage opposite sides of the vacuum roll. Each hood half 58 encloses a burner 60 operable to heat air, and a blower 62 that forces the heated air through a blowing device or nozzle system 64 so as to impinge on the surface of the paper web wrapped about the vacuum roll 54. Although air is a preferred medium, other gaseous fluids, such as steam, can also be used.
  • the vacuum roll 54 operates at a vacuum that is below the "break-through" vacuum above which the impingement air would be suctioned through the web and texturing fabric 34 into -l i ⁇
  • the air impinging on the paper web does not penetrate through the web and texturing fabric 34 and pass into the interior of the vacuum roll 54, but rather is deflected by the web so as to remain within the respective hood 58.
  • the air impinges on the paper web After the air impinges on the paper web, it is collected by each of the hood halves 58 and exhausted from each hood half 58 by an exhaust blower (not shown) and through an exhaust duct 66 and is at least partially recycled in the final drying section 18, as further described below.
  • the paper web leaving the pre-dryer 52 advantageously has a dryness of about 30 to about 60 percent.
  • the texturing fabric 34 carrying the paper web is guided to pass around the vacuum roll 54 by turning rolls 68.
  • the turning rolls 68 can be steam-heated drying cylinders, if desired, to achieve additional drying capacity in the pre-dryer section 16.
  • the turning rolls 68 can be non-heated rolls.
  • the rolls 68 are plated with polished chrome so as to minimize sticking of paper fibers to the rolls.
  • the paper web is transported by the texturing fabric 34 to the final drying section 18, which in the embodiment of FIG. 1 comprises a Yankee dryer system 70.
  • the Yankee dryer system 70 includes a rotatable Yankee dryer 72.
  • the texturing fabric loop includes a transfer roll 74 that forms a nip with the Yankee dryer 72, and the texturing fabric 34 and paper web pass through the nip.
  • the transfer roll 74 presses against the Yankee dryer 72 with just enough pressure to cause the paper web to be transferred from the texturing fabric 34 onto the Yankee dryer, while not substantially damaging the texturing of the paper web.
  • the linear nip load is about 30 to about 90 kN/m.
  • the Yankee dryer system 70 also includes a pair of hood halves 76 that surround a portion of the circumference of the Yankee dryer 72 and are supplied with heated air by a hot air system. The hood halves 76 can be moved apart for access to the Yankee dryer 72 and interior of the housing.
  • the hot air system includes a burner 78 and a blower 80 for each hood half 76.
  • a portion of the air supplied to each hood half 76 comes from the exhaust duct 66 leading from the impingement pre-dryer 52 so as to "pre-heat" the intake air into the hot air system of the Yankee dryer system, which operates at a higher temperature than the pre-dryer.
  • the paper web is dried on the Yankee dryer 72 and is creped by a doctor blade 82 to form a creped paper web W.
  • the paper web is then subjected to final finishing operations such as calendering, if desired, and is wound onto a roll in a reel-up (not shown).
  • the pre-dryer 52 dries the paper web to a dryness entering the Yankee dryer system 70 that exceeds the level of dryness achieved in conventional tissue machines at the ingoing side of the Yankee dryer. In this way, the pre-dryer 52 compensates for the reduced heat transfer in the Yankee dryer system 70.
  • FIG. 2 depicts a paper making apparatus of this type.
  • the apparatus 100 includes a forming section 12, press section 14, and pre-drying section 16 substantially identical to those of the apparatus 10 in FIG. 1.
  • the texturing fabric 34 transports the paper web through a through-air dryer (TAD) 102 for final drying of the paper web.
  • TAD through-air dryer
  • the through-air dryer 102 includes a rotatable roll 104 having a porous mantle 106 about which the texturing fabric 34 and paper web are partially wrapped.
  • the paper web is disposed on the outer surface of the texturing fabric 34 on the roll 104, so that the texturing fabric 34 is against the porous mantle 106.
  • the roll 104 is partially enclosed by a hood 108 to which heated air is supplied by a supply duct system (not shown).
  • the interior of the roll 104 is subjected to a vacuum by a vacuum system (not shown) such that the heated air supplied into the hood 108 is suctioned through the paper web and the texturing fabric 34 and through the porous mantle 106 into the interior of the roll 104, and is then exhausted from the interior of the roll and at least partially recycled.
  • a vacuum system not shown
  • the heated air flowing through the paper web dries the web.
  • the hood 108 can be formed as a pair of hood halves that are movable away from each other and from the roll 104, if desired, for access to the interior of the hood halves and roll for maintenance purposes.
  • FIG. 3 depicts a variation on the apparatus 100 of FIG. 2.
  • the apparatus 100' depicted in FIG. 3 includes a press section 14 having a pressing device 40' arranged relative to the forming section 12 such that the wet paper web is transferred from the inner forming fabric 22 onto a lower surface of a dewatering felt 48 and then carried through the nip of the pressing device.
  • the paper web is transferred onto the upper surface of the texturing fabric 34 in the nip, and the texturing fabric 34 then carries the web through the pre-drying section 16.
  • the apparatus 100' includes an "inverted" impingement pre-dryer 52' in which the hood halves 58 are disposed generally above the turning rolls 68 rather than below them.
  • the paper web is carried from the pressing device 40' to the pre-dryer 52' and from the pre-dryer 52' to the through-air dryer 102' on an upper surface of the texturing fabric 34.
  • the through-air dryer 102' is also of the "inverted" type having the hood 108 located above the roll
  • the pre-drying section 16 can include an infrared dryer 110.
  • the through-air dryers are of the in-flow type in which air flows from the hood inwardly through the paper web and into the interior of the roll from which it is then exhausted, the invention is equally applicable to out-flow type through-air dryers in which the drying air flows from the interior of the roll outwardly through the paper web into the hood from which it is then exhausted. It will also be appreciated that although FIGS.
  • FIGS. 2 and 3 show embodiments having a single TAD, in some circumstances it may be advantageous to use more than one TAD.
  • the paper can be formed on the same texturing fabric that transports the paper through the press and pre-drying sections.
  • FIG. 4 shows an apparatus 200 in which the inner forming fabric of the previously described embodiments has been eliminated and the texturing fabric 34 has been routed around the forming roll 20 to take the place of the inner forming fabric.
  • the paper web is formed on the texturing fabric 34, which then transports the paper web through the press section 14, pre-drying section 16, and final drying section 18 as in the embodiment of FIG. 1.
  • FIG. 5 A further alternative embodiment of the invention is depicted in FIG. 5.
  • the apparatus 300 of FIG. 5 is similar to the apparatus 10 of FIG. 1, but employs a separate pre-drying fabric 302 for transporting the paper web through the pre-drying section 16 and up to the final drying section 18.
  • the texturing fabric 34 carries the paper web only through the press section 14, and the paper web is then transferred onto the pre-drying fabric 302 with the aid of a suction roll 304 or the like.
  • the advantage of using the separate pre-drying fabric 302 is that the texturing fabric 34 and pre-drying fabric 302 can each be optimized for mechanical strength and thermal resistance as required to perform their separate functions.
  • the forming section 12 shown in the embodiment of FIG. 3 has a crescent former in which a headbox 32 is arranged in a lower position relative to the forming roll 20 such that the web is carried on an upper surface of the inner forming fabric 22 to a transfer point at which the web is transferred onto a lower surface of the dewatering felt 48.
  • the crescent former as shown in FIG. 6, such that the headbox 32 is in an upper position relative to the forming roll 20 and the web is carried on a lower surface of the inner forming fabric 22 to a transfer point where the web is transferred onto the upper surface of the texturing fabric 34.
  • the inner forming fabric 22 can be arranged to pass through the nip of the pressing device 40', in which case the transfer point is defined at the nip.
  • the inner forming fabric 22 takes the place of the dewatering felt 48 used in the embodiment of FIG. 3.
  • the transfer point can alternatively be arranged upstream of the pressing device 40' by use of a separate dewatering felt 48 as shown in FIG. 7.
  • the inner forming fabric 22 carries the web on its lower surface up to the texturing fabric 34, where the web is transferred onto the upper surface of the texturing fabric 34.
  • the texturing fabric 34 then carries the web through the pressing device 40' where the web is pressed between the texturing fabric 34 and the dewatering felt 48.
  • the embodiment shown in FIG. 7 is similar to that of FIG. 3.
  • FIG. 8 shows yet another embodiment of the invention, in which the pre-drying section 16 comprises a pair of non-rotary impingement-type dryers 152 of the type substantially described in U.S. Patent No. 5,845,415, incorporated herein by reference.
  • the non-rotary impingement-type dryer 152 includes a flat impingement dryer 154 arranged adjacent one side of the paper web for blowing air onto the web.
  • the fabric 34 carrying the paper web is supported by a plurality of blow boxes 156 and supporting rolls 158 arranged on an opposite side of the fabric and web from the impingement dryer 154 so as to define a generally planar supporting surface for the fabric and web.
  • a blow box 160 is arranged after the impingement dryer 152 for stabilizing the web run leading into the final dryer 18.
  • the pre-dryer 16 may further include an optional infrared dryer such as the infrared dryer 110 shown in FIG. 3 for further pre-drying of the paper web prior to the web entering the final drying section 18.

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Abstract

L'invention concerne un appareil permettant de fabriquer du papier de soie texturé. Ledit appareil comprend : une section de formation destinée à former une bande de papier humide ; un dispositif presse dans lequel la bande de papier mouillé est pressée entre une toile de texturation et un feutre ou une toile d'égouttage visant à texturer et à égoutter la bande ; un préséchoir à air non traversant qui présèche thermiquement la bande sans faire passer de l'air ou un autre fluide gazeux chaud à travers la bande ; et un séchoir final pour le séchage final de la bande. Le préséchoir comprend, selon certains modes de réalisation, un séchoir à impact qui possède un rouleau rotatif permettant de soutenir la bande, et un système de hotte qui entoure partiellement le rouleau et qui comporte des buses permettant de diriger l'air chaud contre la bande. L'air détourné de la bande est recueilli par le système de hotte puis y est rejeté. Selon un mode de réalisation particulier de l'invention, la bande de papier est transportée à travers le préséchoir sur la toile de texturation. Dans un autre mode de réalisation, une toile préséchante séparée transporte la bande à travers le préséchoir. Dans une autre configuration, la bande de papier est formée sur la toile de texturation, laquelle transporte ensuite la bande de papier à travers le dispositif de presse. Le séchoir final peut comprendre un séchoir Yankee ou un séchoir à air traversant.
PCT/SE2000/000925 1999-06-29 2000-05-10 Appareil et procede permettant de fabriquer du papier de soie texture WO2001000925A1 (fr)

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US34248399A 1999-06-29 1999-06-29
US09/342,483 1999-06-29

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1072722A2 (fr) * 1999-07-27 2001-01-31 Voith Paper Patent GmbH Section de séchage
EP1149947A2 (fr) * 2000-04-24 2001-10-31 Georgia-Pacific Corporation Procédé de séchage par jets d' air pour la fabrication d' une feuille absorbante
WO2003000989A1 (fr) * 2001-06-21 2003-01-03 Voith Paper Patent Gmbh Procede et machine permettant de produire des bandes de matiere fibreuse
US6736935B2 (en) 2002-06-27 2004-05-18 Kimberly-Clark Worldwide, Inc. Drying process having a profile leveling intermediate and final drying stages
WO2006018388A1 (fr) 2004-08-16 2006-02-23 Voith Patent Gmbh Machine a papier pourvue d'une presse a une pince
EP1959053A1 (fr) * 2007-02-13 2008-08-20 Voith Patent GmbH Dispositif de séchage d'une bande de matière fibreuse
WO2010046730A1 (fr) * 2008-10-24 2010-04-29 L.C. Paper 1881, S. A. Machine pour sécher du papier essuie-tout équipée d'un système de co-génération
CN102301068A (zh) * 2009-01-30 2011-12-28 沃依特专利有限责任公司 用于制造料幅的设备
CN104674592A (zh) * 2015-03-03 2015-06-03 福建省晋江优兰发纸业有限公司 一种薄页纸起皱方法
CN105486075A (zh) * 2015-12-25 2016-04-13 广东华凯科技股份有限公司 一种应用于燃气烘缸的控制系统
CN106283815A (zh) * 2015-05-29 2017-01-04 金红叶纸业集团有限公司 干燥系统及其造纸方法
CN106283816A (zh) * 2015-05-29 2017-01-04 金红叶纸业集团有限公司 干燥系统及其造纸方法
WO2017060053A1 (fr) * 2015-10-06 2017-04-13 Andritz Ag Procédé de fabrication d'une bande de matière fibreuse
IT201700007552A1 (it) * 2017-01-24 2018-07-24 Elettromeccanica Ind Lucchese S R L Un innovativo impianto di essiccazione della carta con turbina per la produzione del flusso di aria di asciugatura
US10260200B2 (en) * 2015-04-23 2019-04-16 Valmet S.P.A. Yankee drying hood arrangement, a yankee drying cylinder fitted with a yankee drying hood arrangement and a method of drying a fibrous web

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309246A (en) * 1977-06-20 1982-01-05 Crown Zellerbach Corporation Papermaking apparatus and method
US5776307A (en) * 1993-12-20 1998-07-07 The Procter & Gamble Company Method of making wet pressed tissue paper with felts having selected permeabilities

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309246A (en) * 1977-06-20 1982-01-05 Crown Zellerbach Corporation Papermaking apparatus and method
US5776307A (en) * 1993-12-20 1998-07-07 The Procter & Gamble Company Method of making wet pressed tissue paper with felts having selected permeabilities

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1072722A3 (fr) * 1999-07-27 2001-05-09 Voith Paper Patent GmbH Section de séchage
US6442865B1 (en) 1999-07-27 2002-09-03 Voith Sulzer Papiertechnik Patent Gmbh Drying section
EP1072722A2 (fr) * 1999-07-27 2001-01-31 Voith Paper Patent GmbH Section de séchage
EP1149947A2 (fr) * 2000-04-24 2001-10-31 Georgia-Pacific Corporation Procédé de séchage par jets d' air pour la fabrication d' une feuille absorbante
EP1149947A3 (fr) * 2000-04-24 2003-01-08 Georgia-Pacific Corporation Procédé de séchage par jets d' air pour la fabrication d' une feuille absorbante
WO2003000989A1 (fr) * 2001-06-21 2003-01-03 Voith Paper Patent Gmbh Procede et machine permettant de produire des bandes de matiere fibreuse
US6986830B2 (en) 2001-06-21 2006-01-17 Voith Paper Patent Gmbh Method and a machine for the manufacture of a fiber web
US6736935B2 (en) 2002-06-27 2004-05-18 Kimberly-Clark Worldwide, Inc. Drying process having a profile leveling intermediate and final drying stages
WO2006018388A1 (fr) 2004-08-16 2006-02-23 Voith Patent Gmbh Machine a papier pourvue d'une presse a une pince
US7776185B2 (en) 2004-08-16 2010-08-17 Voith Patent Gmbh Paper machine comprising a single nip press
US8196314B2 (en) 2007-02-13 2012-06-12 Voith Patent Gmbh Apparatus for drying a fibrous web
EP1959053A1 (fr) * 2007-02-13 2008-08-20 Voith Patent GmbH Dispositif de séchage d'une bande de matière fibreuse
WO2010046730A1 (fr) * 2008-10-24 2010-04-29 L.C. Paper 1881, S. A. Machine pour sécher du papier essuie-tout équipée d'un système de co-génération
CN102301068A (zh) * 2009-01-30 2011-12-28 沃依特专利有限责任公司 用于制造料幅的设备
CN104674592A (zh) * 2015-03-03 2015-06-03 福建省晋江优兰发纸业有限公司 一种薄页纸起皱方法
US10260200B2 (en) * 2015-04-23 2019-04-16 Valmet S.P.A. Yankee drying hood arrangement, a yankee drying cylinder fitted with a yankee drying hood arrangement and a method of drying a fibrous web
CN106283815A (zh) * 2015-05-29 2017-01-04 金红叶纸业集团有限公司 干燥系统及其造纸方法
CN106283816A (zh) * 2015-05-29 2017-01-04 金红叶纸业集团有限公司 干燥系统及其造纸方法
WO2017060053A1 (fr) * 2015-10-06 2017-04-13 Andritz Ag Procédé de fabrication d'une bande de matière fibreuse
CN106968120A (zh) * 2015-10-06 2017-07-21 安德里特斯公开股份有限公司 用于制造纤维材料幅的方法
US10808360B2 (en) 2015-10-06 2020-10-20 Andritz Ag Method for producing a fibrous material web
CN105486075A (zh) * 2015-12-25 2016-04-13 广东华凯科技股份有限公司 一种应用于燃气烘缸的控制系统
IT201700007552A1 (it) * 2017-01-24 2018-07-24 Elettromeccanica Ind Lucchese S R L Un innovativo impianto di essiccazione della carta con turbina per la produzione del flusso di aria di asciugatura

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