EP1266087B1 - Agencement et procede de formation d'une bande de papier ou de carton multicouches - Google Patents

Agencement et procede de formation d'une bande de papier ou de carton multicouches Download PDF

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Publication number
EP1266087B1
EP1266087B1 EP00986164A EP00986164A EP1266087B1 EP 1266087 B1 EP1266087 B1 EP 1266087B1 EP 00986164 A EP00986164 A EP 00986164A EP 00986164 A EP00986164 A EP 00986164A EP 1266087 B1 EP1266087 B1 EP 1266087B1
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EP
European Patent Office
Prior art keywords
forming
wire
web
fines
dewatering
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP00986164A
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German (de)
English (en)
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EP1266087A1 (fr
Inventor
Jukka Kinnunen
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Valmet Technologies Oy
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Metso Paper Oy
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Priority claimed from SE9904605A external-priority patent/SE516329C2/sv
Application filed by Metso Paper Oy filed Critical Metso Paper Oy
Publication of EP1266087A1 publication Critical patent/EP1266087A1/fr
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Publication of EP1266087B1 publication Critical patent/EP1266087B1/fr
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    • 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
    • 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
    • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
    • 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
    • D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers
    • 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
    • D21F9/02—Complete machines for making continuous webs of paper of the Fourdrinier type

Definitions

  • the present invention relates to an arrangement for forming a multilayered paper or paperboard from stock suspensions with papermaking fibres and fines, said arrangement including at least a first and a second forming unit, at least one of the forming units being of twin wire type and having a forming roll for forming a fibrous web having a higher content of fines at one side than at the other, and a couch device for couching together said fibrous web having a higher content of fines at one side with an other fibrous web to form the multilayered web.
  • the invention relates to a method of a multilayered paper or paperboard web from stock suspensions with papermaking fibres and fines, said method including the steps of:
  • the invention is particularly advantageously implemented when forming testliner, fluting, liner, white-top liner, gypsum board liner, and paperboard based on recycled pulp fibres.
  • the invention also can be implemented when forming other paper or paperboard webs.
  • bottom layer and top layer(s) for example in so-called fourdrinier forming units, or alternatively in twin-wire forming units of a paper or paperboard machine, in order to subsequently couch the layers together into a coherent web, which is pressed in a press section and dried in a drying section.
  • top and bottom layers in fourdrinier forming units, as a rule, results in a finished product with a higher internal bond strength, i.e. bond strength between the layers, than what is achievable if the top and bottom layers are formed in twin-wire forming units.
  • the patent publication DE 2 020 688 discloses a method for joining two webs of paper, paperboard or the like, more specifically a couching method, and a device for implementing the method.
  • the method comprises that the two webs run in the same direction during their manufacture and are joined in a such a way that the wire-side of the secondary web comes to rest on the top side of the primary web.
  • the device disclosed in DE 2 020 688 comprises a movable long wire (fourdrinier) as a primary wire, and at least one wire arranged in circulation above the long wire as a secondary wire.
  • each wire runs in the opposite direction in relation to the long wire, wherein each wire in circulation has been supplied with a transfer roll which is arranged so that it contacts the wire in circulation on an outer side and the long wire on its top side.
  • the patent publication DE 40 31 038 A 1 discloses a device for manufacturing a multilayer paper or multilayer paperboard by means of a primary wire, and a secondary wire arranged above this as twin-wire forming unit, which forms a top layer of the multilayer paper or paperboard onto a bottom layer.
  • the twin-wire forming unit has a forming roll as a breast roll for configurating the twin-wires.
  • a pressure application unit is arranged, wherein the waterline of the pulp suspension is within the region of the forming roll.
  • the disclosed device makes it possible to obtain a higher internal bond strength, since the dry content of the top layer is relatively low when the couching to the bottom layer takes place.
  • each twin-wire forming unit consists of a headbox, two wire loops arranged to define a common wire path for molding the web being formed in a sandwich-like manner, and drainage elements for each of the wire loops.
  • the common wire path of each forming unit has a first section including a curved suction drainage element or roll in the first lower wire loop, and a second section including opposing drainage ledges. Thereby, the drainage ledges are stationary at the upper side and designed to be resiliently pressable on the bottom side.
  • the drainage ledges of the upper and lower sides are arranged staggered with respect to each other in the direction of travel of the wire, wherein at least the ledges of the upper side are designed for suction. Furthermore, there is at least one third section which has at least one suction wire-separating element on one side.
  • the twin-wire forming units are arranged so that the same drainage elements are associated in each case with what will be the inner and the outer sides of each layer in the multilayer web. According to US 5,607,555, a very uniform paper is obtained in this way. Furthermore, it is reported that the contents of filler and/or fines can be displaced towards the outsides of the layers of the paper web by means of arranging the drainage ledges in a suitable way, depending on the prevailing requirements. As a result of this, a larger number of fibres are believed to be present on the two sides of the layers which rest against each other, wherein a better adhesion between the layers is obtained when they have been couched together.
  • a first object of the present invention is to provide an arrangement for forming a multilayered paper or paperboard web, which arrangement maximises the amount of fines which is retained when forming the layers included in the web, and ensures that those sides of the layers which have the highest content of fines are couched together with each other, so that the multilayered paper or paperboard web obtains a raised internal bond strength.
  • both of the forming units are of twin wire type and include a forming roll for forming a fibrous web having a higher content of fines at one side than at the other, and that the two forming are so arranged relative to each other as to place the web sides having the highest content of fines in contact with each other for couching together to form the multilayered web.
  • the forming rolls are open and adapted for making the content of fines in the fibre webs higher at the inner-wire side than at the outer wire-side during the initial dewatering, wherein the additional drainage members are adapted for maintaining the content of fines at least substantially unchanged at a high level at the inner-wire side during the continued dewatering, and the forming units are designed and arranged in relation to each other so that the two formed fibre webs are joined with the inner-wire sides against each other.
  • a second object of the present invention is to provide a method for forming a multilayered paper or paperboard web which method maximises the amount of fines that is retained when forming the layers included in the web, and ensures that those sides of the layers that have the highest content of fines are couched together with each other, so that the multilayer paper or paperboard web obtains a raised internal bond strength.
  • this second object of the present invention is achieved by:
  • the method additionally includes the steps of chosing open forming rolls for the initial dewatering, adapting them so that the content of fines in the fibrous webs becomes at least as high at the inner wire side as at the outer wire side during the initial dewatering, adapting the additional drainage members so that the content of fines will be maintained at least substantially unchanged at a high level at the inner wire side during ghe continued dewatering, and joining the two formed fibrous webs with the inner wire sides against each other.
  • open forming rolls means that a two-sided dewatering on the forming rolls, if possible, is accomplished without the application of any external suction.
  • open forming rolls is also intended to include embodiments of the invention where a suction forming roll with a low, or at the most, a moderate negative pressure is utilised in order to prevent all dewatering from taking place through the outer-wire at high wire speeds, but in which embodiments the main drainage impulse still is generated by the wire tension during the passage of the wires over the curved peripheral surface of the forming roll.
  • the arrangement according to the invention comprises a first 101; 201; 301; 401and a second forming unit 102; 202; 302; 402, wherein each forming unit is of a twin-wire type and has a forming roll 109; 209; 309; 409 and 111; 211; 311; 411, and an inner-wire 105; 205; 305; 405 and 107; 207; 307; 407 and an outer-wire 106; 206; 306; 406 and 108; 208; 308; 408 enclosing a portion of the circumference of each respective forming roll and thereby forming an initial, curved section of a forming zone for an initial dewatering and forming of a fibre web A and B, having an inner-wire side x and z supported by the inner-wire and an outer-wire side y and w supported by the outer-wire.
  • the curved section is followed by a section with additional drainage members 110; 210; 310; 410 and 112; 212; 312; 412 for a continued dewatering of the formed fibre web A and B, wherein vacuum transfer means 113, 114, 115; 213, 214, 215; 313, 314, 315, 327; 413, 414, 415, 427 are arranged for joining the fibre webs A, B in order to form a multilayered fibre web C, which is intended to be included in or to constitute the multilayered paper or paperboard web D after pressing and drying.
  • the forming rolls 109, 111; 209, 211; 309,311; 409, 411 are open, and adapted to make the content of fines in the fibre webs A, B higher at the inner-wire side x and z than at the outer-wire side y and w during the initial dewatering, while the additional drainage members 110, 112; 210, 212; 310, 312; 410, 412 are adapted for maintaining the content of fines at least substantially unchanged at a high level at the inner-wire side x and z during the continued dewatering, and the forming units 101; 201; 301; 401 and 102; 202; 302; 402 are designed and arranged in relation to each other so that the two formed fibre webs A, B are joined with the inner-wire sides x and z against each other.
  • the above-mentioned open forming rolls of the arrangement according to the invention are adapted in order to provide a "gentle" dewatering, substantially without any shear forces, contrary to what is the case with vacuum or suction forming rolls of arrangements according to prior art, and enabling a high proportion of the supplied fines in the pulp suspensions to remain in the suspensions all the way to the continued dewatering.
  • a certain redistribution of the fines in a direction towards the forming rolls can occur in the pulp suspensions.
  • the specially adapted additional drainage members of the arrangement according to the invention do not comprise any elements at the inner-wire sides which generate high shear forces, such as drainage foils and the like. This is the reason why the main proportion of the fines are retained at the inner-wire sides also during the continued dewatering. During the continued dewatering, a minor portion of the fines can be suctioned out from the pulp suspensions on the side, i.e. the outer-wire side, where the additional drainage members preferably all are arranged in the arrangement according to the invention.
  • the arrangement according to the invention maximises the quantity of fines which is retained when forming the layers included in the web, and ensures that those sides of the layers which have the highest content of fines, i.e. the inner-wire sides, are couched together with each other so that the resulting multilayered paper or paperboard web obtains an increased internal bond strength in comparison to paper or paperboard webs which have been formed in arrangements according to prior art.
  • the above-mentioned additional drainage members 110, 112; 210, 212; 310, 312; 410, 412 are arranged for completing the forming of the fibre webs A and B.
  • the forming can be regarded as completed when the main part of all free water has been removed, so that a coherent paper sheet has been formed.
  • the additional drainage members are all arranged at the outer-wires 106, 108; 206, 208; 306, 308; 406, 408 for dewatering the fibre webs from the outer wire-sides y and w.
  • additional drainage members 110, 112; 210, 212; 310, 312; 410, 412 particularly advantageously comprise vacuum suction boxes with one or several vacuum zones adapted in order to remove substantially all free water from the fibre webs A and B before the joining.
  • additional drainage members 110, 112; 210, 212; 310, 312; 410, 412 particularly advantageously comprise vacuum suction boxes with one or several vacuum zones adapted in order to remove substantially all free water from the fibre webs A and B before the joining.
  • additional drainage members 110, 112; 210, 212; 310, 312; 410, 412 particularly advantageously comprise vacuum suction boxes with one or several vacuum zones adapted in order to remove substantially all free water from the fibre webs A and B before the joining.
  • the forming rolls 509, 511 have a diameter of about 1.4 - 1.8 m, and are arranged with a wire winding angle which is at least 80° for the initial dewatering.
  • one or several of the vacuum transfer means 513, 514 are arranged in order to constitute the additional drainage members for the continued dewatering.
  • the arrangement according to this embodiment comprises forming rolls having a large diameter and a large wire winding angle, something which provides an efficient dewatering and a very high dryness already after the initial dewatering. This embodiment enables a simplified arrangement, since the continued dewatering and the web transfer between the wires are provided by the same members.
  • the arrangement comprises headboxes 103, 104; 203, 204; 303,304; 403, 404, forming rolls 109, 111; 209, 211; 309, 311; 409, 411, additional drainage members 110, 112; 210, 212; 310; 312; 410, 412, and preferably also wires 105, 107; 205, 207; 305, 306, 307, 308; 405, 406, 407, 408, which are identical in the first 101; 201; 301; 401 and in the second 102; 202; 302; 402 forming unit.
  • This embodiment provides large cost advantages, since the number of spare parts in stock can be minimised.
  • the arrangement further comprises drive rolls 116, 117; 216, 217; 316, 317; 416, 417, guide rolls 118, 119; 218, 219; 318, 319; 418,419 and tensioning rolls 120, 121; 220, 221; 320, 321; 420, 421 which are identical in the first 101; 201; 301; 401 and the second 102; 202; 302; 402 forming unit.
  • the guide rolls are driven, or where the tensioning rolls function as guide rolls.
  • the first 101; 201; 301; 401 and the second 102; 202; 302; 402 forming unit are substantially mirror-invertedly identical.
  • the arrangement further comprises a first vacuum transfer means 113; 213 arranged for transferring a first fibre web A from the inner-wire 105; 205 to the outer-wire 106; 206 of the first forming unit 101; 201, a second vacuum transfer means 114; 214 arranged for transferring a second fibre web B from the inner-wire 107; 207 to the outer-wire 108; 208 of the second forming unit 102; 202, and a third vacuum transfer means 115; 215 arranged for transferring the second fibre web B from the outer-wire108; 208 of the second forming unit 102; 202 onto the first fibre web A in order to form the multilayered fibre web C.
  • these vacuum transfer means does not have as their task to achieve any dewatering, they are only intended to transfer a fibre web from one wire to another.
  • the arrangement 300; 400 comprises a bottom layer forming unit 328; 428 having an additional headbox 329; 429 for forming a bottom layer E onto at least one bottom-wire 330; 430, wherein at least one vacuum transfer means 313; 413 is arranged for transferring the first fibre web A onto the bottom layer E on the bottom-wire 330; 430.
  • the arrangement 300; 400 particularly advantageously comprises at least one additional vacuum transfer means 327; 427 arranged for transferring the first fibre web A from the outer-wire 306; 406 to the inner-wire 305; 405 of the first forming unit 301; 401.
  • the bottom layer forming unit of course also comprises suitable drainage members 331; 431.
  • the arrangement 200; 400 further comprises a top layer forming unit 222; 422 having an additional headbox 223; 423 for forming a top layer F on at least one top-wire 224; 424, and an additional vacuum transfer means 226; 426 arranged for transferring the top layer F onto the second fibre web B in order to form the multilayered fibre web C.
  • the top layer forming unit of course comprises suitable drainage members 325; 425.
  • the above-mentioned vacuum transfer means or additional vacuum transfer means of the arrangement according to the invention preferably comprises vacuum suction boxes 113, 114, 115; 213, 214, 215, 226; 313, 314, 315, 327; 413, 414, 415, 426, 427 and/or vacuum suction rolls.
  • the method according to the invention comprises that pulp suspensions with pulp fibres and fines are dewatered in a first 101; 201; 301; 401 and a second 102; 202; 302; 402 forming unit.
  • Each forming unit is of a twin-wire type and has a forming roll 109; 209; 309; 409 and 111; 211; 311; 411, and an inner-wire 105; 205; 305; 405 and 107; 207; 307; 407 and an outer-wire 106; 206; 306; 406 and 108; 208; 308; 408 enclosing a portion of the circumference of each forming roll, and thereby forming an initial, curved section of a forming zone in which initial dewatering and forming is performed of a fibre web A and B having an inner-wire side x and z supported by the inner-wire and an outer-wire side y and z supported by the outer-wire.
  • a continued dewatering of the formed fibre web A, B is performed by means of additional drainage members 110; 210; 310; 410 and 112; 212; 312; 412, whereafter the fibre webs A, B are joined by means of vacuum transfer means 113, 114, 115; 213, 214, 215; 313, 314, 315, 327; 413, 414, 415, 427 in order to form a multilayered fibre web C, intended to be included in or to constitute the multilayered paper or paperboard web D after pressing and drying.
  • open forming rolls 109, 111; 209, 211; 309, 311; 409, 411 are chosen for the initial dewatering and are adapted so that the content of fines in the fibre webs A, B becomes at least as high at the inner-wire side x and z as at the outer-wire side y and w during the initial dewatering, while the additional drainage members 110, 112; 210, 212; 310, 312; 410, 412 are adapted so that the content of fines is maintained at least substantially unchanged at a high level at the inner-wire side x and z, and wherein the two formed fibre webs A, B are joined with their inner-wire sides x and z against each other.
  • the initial dewatering results in a dry content of the pulp suspensions which is between 2 and 3%.
  • the continued dewatering primarily takes place in a direction towards the outer-wire sides y and w of the fibre webs A and B.
  • the highest possible content of retained fines is obtained at the inner-wire sides x and z, which thereafter are to be couched together, and consequently also the highest possible internal bond strength.
  • the continued dewatering particularly advantageously results in a dryness of the fibre webs A and B which is higher than about 6 to 8%.
  • the forming can be regarded as completed, and the fines present in the fibre webs are retained in a stable way even in case the fibre webs subsequently would be subjected to high vacuum (i.e. suction).
  • forming rolls 509, 511 having a diameter of about 1.4 - 1.8 m are chosen.
  • the wire winding angle is adapted to be at least 80°, wherein the initial dewatering results in a dry content of the pulp suspensions in the order of 6%.
  • the continued dewatering results in a dry content of the fibre webs A and B which is higher than about 6 - 8 %, wherein the continued dewatering is accomplished by means of one or several of the vacuum transfer means 513, 514.
  • a few of the vacuum transfer means 113, 114; 213, 214; 313, 314, 327; 413, 414, 427 provide an additional dewatering after the continued dewatering , resulting in a dryness higher than about 8 to 10% of the fibre webs A and B before they are joined into the multilayered fibre web C.
  • the high content of fines at the inner-wire sides x and z which is obtained by means of the method according to the invention makes it possible to obtain a high internal bond strength.
  • a first fibre web A is transferred from the inner-wire 105; 205 to the outer-wire 106; 206 of the first forming unit 101; 201, while a second fibre web B is transferred from the inner-wire 107; 207 to the outer-wire 108; 208 of the second forming unit 102; 202 in order to be transferred therefrom be onto the first fibre web A.
  • the method further comprises to form a bottom layer E on at least one bottom-wire 330; 430, and that the first fibre web A thereafter is transferred onto the bottom layer E.
  • the first fibre web A is particularly advantageously transferred from the outer-wire 306; 406 to the inner-wire 305; 405 of the first forming unit 301; 401 before the first fibre web A is transferred.
  • the method further comprises to form a top layer F on at least one top-wire 224; 424, and that the top layer F thereafter is transferred onto the second fibre web B.
  • FIG. 1 an arrangement 100 according to the invention is shown in greater detail in a configuration which is particularly well suited for forming testliner or fluting having a top layer within the grammage range 30-100 g/m 2 and a base layer within the range 50-150 g/m 2 .
  • the arrangement could also be used when forming other types of paper or paperboard webs in cases where it is desired to form and couch together two different layers.
  • a very compact and cost efficient unit is obtained in this configuration, since a number of the parts included in the two twin-wire forming units 101, 102 are identical in both units.
  • the forming rolls 110, 111 are open and are not vacuum suction rolls, no significant redistribution of fines takes place in the pulp suspension, and a relatively uniform sheet structure in the Z-direction can be obtained. Furthermore, during the forming, the additional drainage members 110, 112 are acting exclusively on the outer-wire sides y and w, B, which are not to be couched together, of the fibre webs A and. For this reason, the content of fines at the opposing inner-wire sides x and z, which are to be couched together, remains unchanged at a high level (see Fig. 5).
  • Fig. 2 shows an arrangement 200 according to the invention in greater detail in a configuration which is particularly well suited for liner, "white top” liner, or gypsum board liner.
  • this arrangement could also be utilised when forming other types of paper or paperboard webs where it is desirable to form and couch together three different plies.
  • the arrangement 200 can be said to be of the type "Top-side Down", since a top layer is formed in the twin-wire forming unit 201, a middle layer is formed in the twin-wire forming unit 202, and a bottom layer is formed in the fourdrinier forming unit 222.
  • the grammage of the top layer advantageously can be 40-80 g/m 2 , of the middle layer 55-170 g/m 2 , and of the bottom layer 30-50 g/m 2 , but it is also conceivable with other grammage intervals.
  • Fig. 3 shows another arrangement 300 according to the invention in greater detail, also in a configuration which is particularly well suited for liner, "white top” liner or gypsum board liner.
  • this arrangement could also be utilised when forming other types of paper or paperboard webs where it is desired to form and couch together three different layers.
  • the arrangement in Fig. 3 is of the type "Top-side Up", i.e. a bottom layer is formed in the fourdrinier forming unit 328, a middle layer is formed in the twin-wire forming unit 301, and a top layer is formed in the twin-wire forming unit 302.
  • the grammage of the bottom layer advantageously can be 43-80 g/m 2 , of the middle layer 55-155 g/m 2 , and of the top layer 40-65 g/m 2 , but it is also conceivable with other grammage intervals.
  • Fig. 4 discloses an arrangement 400 according to the invention in greater detail, now in a configuration which is particularly well suited for liner or paperboard, and particularly for paperboard based on recycled fibres. However, this arrangement could also be utilised when forming other types of paper or paperboard webs where it is desirable to be able to form and couch together four different layers (sheets).
  • a bottom layer is formed in the fourdrinier forming unit 428
  • a single middle layer or alternatively a first middle layer is formed in the twin-wire forming unit 402
  • an underliner or alternatively a second middle layer is formed in the twin-wire forming unit 402
  • a top layer is formed in the fourdrinier forming unit 422.
  • the grammage of the above-mentioned bottom layer can advantageously be 25-90 g/m 2 , of the above-mentioned single middle layer 40-200 g/m 2 , of the above-mentioned first middle layer 60-180 g/m 2 , of the above-mentioned underliner 30-90 g/m 2 , of the above mentioned second middle layer 60-180 g/m 2 , and of the above-mentioned top layer 30-60 g/m 2 .
  • the attached Fig. 6 illustrates the relative percentage of fines F as a function of the thickness Z of a first fibre web from the bottom BO to the top TO, wherein the first fibre web has been formed in a forming unit of an arrangement according to the invention, and a specimen for analysis of fines content has been extracted before joining to a second fibre web.
  • the arrangements 100; 200; 300; 400; 500 in Figs 1-4 and 7 all are provided with so-called forming boards 132, 133; 232, 233; 332, 333; 432, 433; 532, 533 with support foils inside the inner-wire loops downstream their forming rolls 109, 111; 209, 211; 309, 311; 409, 411; 509, 511.
  • the wire tables/support foils shown in the figures do not provide any drainage function.

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Claims (24)

  1. Installation destiné à former une bobine continue de papier ou de carton multicouche (D) à partir de suspensions de pâte avec des fibres et des fines de fabrication du papier, ladite installation comprenant au moins une première (101 ; 201 ; 301 ; 401 ; 501) et une deuxième (102 ; 202 ; 302 ; 402 ; 502) unités de formation, les deux unités de formation étant d'un type à double toile et comprennent un rouleau de formation (109 ; 209 ; 309 ; 409 ; 509 ; 111 ; 211 ; 311 ; 411 ; 511) pour former une bobine fibreuse (A ; B) présentant une teneur supérieure en fines au niveau d'un côté (x ; z) qu'au niveau de l'autre (y ; w) et un dispositif de couchage (117 ; 217 ; 316, 317 ; 416, 417) destiné à coucher ensemble ladite bobine fibreuse (A ; B) présentant une teneur supérieure en fines au niveau d'un côté avec une autre bobine fibreuse (B ; A) pour former la bobine multicouche (D),
    caractérisée en ce que les deux unités de formation (101 ; 201 ; 301 ; 401 ; 501 ; 102 ; 202 ; 302 ; 402 ; 502) sont agencées l'une par rapport à l'autre de manière à placer les côtés de bobine (x ; z) présentant la teneur la plus élevée en fines en contact l'un avec l'autre pour les coucher ensemble pour former la bobine multicouche (D).
  2. Installation selon la revendication 1,
    dans laquelle chaque unité de formation est d'un type à double toile et comprend un rouleau de formation (109 ; 209 ; 309 ; 409 ; 509 ; 111 ; 211 ; 311 ; 411 ; 511) et une toile intérieure (105 ; 205 ; 305 ; 405 ; 107 ; 207 ; 307 ; 407) et une couche extérieure (106 ; 206 ; 306 ; 406 ; 108 ; 208 ; 308 ; 408) enroulant une partie de la circonférence de chaque rouleau de formation respectif et formant de ce fait une section courbe initiale d'une zone de formation pour un épaississement initial et formant une bobine fibreuse (A ; B) présentant un côté de toile intérieure (x, z) supporté par la toile intérieure et un côté de toile extérieure (y, w) supporté par la toile extérieure, et laquelle section courbe est suivie par une section avec des éléments de drainage supplémentaires (110; 210 ; 310 ; 410 ; 513 ; 112 ; 212 ; 312 ; 412 ; 514) pour un épaississement continu de la bobine fibreuse formée (A ; B) et dans laquelle des moyens de transfert à ventouses (113, 114, 1115 ; 213, 214, 215 ; 313, 314, 315, 327 ; 413, 414, 415, 427 ; 513, 514, 515) sont agencés pour joindre les bobines fibreuses (A ; B) afin de former une bobine fibreuse multicouche (C), destinée à être comprise dans ou à constituer ladite bobine de papier ou de carton multicouche (D) après pressage et séchage,
    caractérisée en ce que lesdits rouleaux de formation (109, 111 ; 209, 211 ; 309, 311 ; 409, 411 ; 509, 511) sont ouverts et adaptés pour rendre la teneur en fines dans les bobines fibreuses (A ; B) supérieure au niveau du côté de toile intérieure (x, z) qu'au niveau du côté de toile extérieure (y, w) pendant l'épaississement initial, et en ce que les éléments de drainage supplémentaires (110, 112 ; 210, 212 ; 310, 312 ; 410, 412 ; 513, 514) sont adaptés pour maintenir la teneur en fines au moins sensiblement inchangée à un niveau élevé au niveau du côté de toile intérieure (x, z) pendant l'épaississement continu, et en ce que les unités de formation (101 ; 201 ; 301 ; 401 ; 501 ; 102 ; 202 ; 302 ; 402 ; 502) sont conçues et agencées l'une par rapport à l'autre de manière à ce que les deux bobines fibreuses formées (A ; B) sont jointes avec les côtés de toile intérieure (x, z) l'un contre l'autre.
  3. Installation selon la revendication 2,
    dans laquelle lesdits éléments de drainage supplémentaires (110, 112 ; 210, 212 ; 310, 312 ; 410 412) sont agencés pour compléter la formation desdites bobines fibreuses (A, B), caractérisée en ce que lesdits éléments de drainage supplémentaires sont tous disposés au niveau des toiles extérieures (106, 108 ; 206, 208 ; 306, 308 ; 406, 408) pour épaissir les bobines fibreuses (A, B) à partir des côtés de toile extérieure (y, w).
  4. Installation selon la revendication 2 ou 3,
    caractérisée en ce que les éléments de drainage supplémentaires (110, 112 ; 210, 212 ; 310, 312 ; 410 412) comprennent des caisses aspirantes à ventouse avec une ou plusieurs zones d'aspiration adaptées pour retirer sensiblement toute l'eau libre desdites bobines fibreuses (A, B) avant de les joindre.
  5. Installation selon la revendication 2,
    caractérisée en ce que les rouleaux de formation (509, 511) présentent un diamètre d'environ 1,4 à 1,8 m, et sont pourvu d'un enroulement de toile autour du rouleau de formation d'au moins 80° pour l'épaississement initial, un ou plusieurs des moyens de transfert à ventouses (513, 514) étant disposés pour constituer lesdits éléments de drainage supplémentaires pour l'épaississement continu.
  6. Intallation selon l'une quelconque des revendications 2 à 5,
    caractérisée en ce que l'installation comprend des caisses de tête (103, 104 ; 203, 204 ; 303, 304 ; 403, 404), des rouleaux de formation (109, 111 ; 209, 211 ; 309, 311 ; 409, 411), des éléments de drainage supplémentaires (110, 112 ; 210, 212 ; 310, 312 ; 410 412), et de préférence également des toiles (105, 107 ; 205, 207 ; 305, 306, 307, 308 ; 405, 406, 407, 408), dont tous sont identiques dans la première (101 ; 201 ; 301 ; 401) et la deuxième (102 ; 202 ; 302 ; 402) unités de formation.
  7. Installation selon l'une quelconque des revendications 2 à 6,
    caractérisée en ce que l'installation comprend des rouleaux d'entraînement (116, 117 ; 216, 217 ; 316, 317 ; 416, 417), des rouleaux de guidage (118, 119 ; 218, 219 ; 318, 319 ; 418, 419), et des rouleaux de tension (120, 121 ; 220, 221 ; 320, 321 ; 420, 421), dont tous sont identiques dans la première (101 ; 201 ; 301 ; 401) et la deuxième (102 ; 202 ; 302 ; 402) unités de formation.
  8. Installation selon l'une quelconque des revendications 2 à 7,
    caractérisée en ce que la première (101 ; 201 ; 301 ; 401) et la deuxième (102 ; 202 ; 302 ; 402) unités de formations sont sensiblement inversées à l'identique.
  9. Installation selon l'une quelconque des revendications 2 à 8,
    caractérisée en ce que l'installation comprend des premiers moyens de transfert à ventouses (113 ; 213) agencés pour transférer une première bobine fibreuse (A) depuis la toile intérieure (105 ; 205) vers la toile extérieure (106 ; 206) de la première unité de formation (101 ; 201), des deuxièmes moyens de transfert à ventouses (114 ; 214) agencés pour transférer une deuxième bobine fibreuse (B) depuis la toile intérieure (107 ; 207) vers la toile extérieure (108 ; 208) de la deuxième unité de formation (102 ; 202), et des troisièmes moyens de transfert à ventouses (115 ; 215) agencés pour transférer la deuxième bobine fibreuse (B) depuis la toile extérieure (108 ; 208) de la deuxième unité de formation (102 ; 202) sur la première bobine fibreuse (A) pour former la bobine fibreuse multicouche (C).
  10. Installation selon l'une quelconque des revendications 2 à 8,
    caractérisée en ce que l'installation (300 ; 400) comprend une unité de formation de couche inférieure (328 ; 428) présentant une caisse de tête supplémentaire (329 ; 429) destinée à former une couche inférieure (E) sur au moins une toile inférieure (330 ; 430), et en ce qu'au moins des premiers moyens de transfert à ventouses (313 ; 413) sont agencés pour transférer la première bobine fibreuse (A) sur la couche inférieure (E) sur la toile inférieure (330 ; 430).
  11. Installation selon la revendication 10,
    caractérisée en ce que l'installation (300 ; 400) comprend au moins des premiers moyens de transfert à ventouses supplémentaires (327 ; 427) agencés pour transférer la première bobine fibreuse (A) depuis la toile extérieure (306 ; 406) vers la toile intérieure (305 ; 405) de la première unité de formation (301 ; 401).
  12. Installation selon l'une quelconque des revendications 2 à 11,
    caractérisée en ce que l'installation (200 ; 400) comprend en outre une unité de formation de couche supérieure (222 ; 422) comprenant une caisse de tête supplémentaire (223 ; 423) pour former une couche supérieure (F) sur au moins une toile supérieure (224 ; 424) et des moyens de transfert à ventouses supplémentaires (226 ; 426) agencés pour transférer la couche supérieure (F) sur la deuxième bobine fibreuse (B) pour former la bobine fibreuse multicouche (C).
  13. Installation selon l'une quelconque des revendications 2 à 12,
    caractérisée en ce que lesdits moyens de transfert à ventouses ou moyens de transfert à ventouses supplémentaires comprennent des caisses aspirantes à ventouses (113, 114, 115 ; 213, 214, 215, 226 ; 313, 314, 315, 327 ; 413, 414, 415, 426, 427) et/ou des rouleaux aspirants à ventouses.
  14. Procédé de formation d'une bobine de papier ou de carton multicouche (D) à partir de suspensions de pâte avec des fibres et des fines de fabrication du papier, ledit procédé comprenant les étapes consistant à :
    former une première bobine de fibres (A) présentant une teneur supérieure en fines au niveau d'un côté (x) qu'au niveau de l'autre (y) dans une première unité de formation (101 ; 201 ; 301 ; 401 ; 501) de type à double toile et comprenant un rouleau de formation (109 ; 209 ; 309 ; 409 ; 509),
    former une deuxième bobine de fibres (B) dans une deuxième unité de formation (102 ; 202 ; 302 ; 402 ; 402),
    coucher les bobines formées (A ; B) ensemble pour former la bobine multicouche (D),
    utiliser comme deuxième unité de formation (102 ; 202 ; 302 ; 402 ; 502) une unité de formation à double toile comprenant un rouleau de formation (111 ; 211 ; 311 ; 411 ; 511),
    former également la deuxième bobine de fibres (B) avec une teneur supérieure en fines au niveau d'un côté (z) qu'au niveau de l'autre (w), et
    positionner les bobines (A, B) de manière à garantir que ces côtés (x, z) des bobines, qui présentent la teneur la plus élevée en fines, sont couchés ensemble pour former la bobine multicouche (D).
  15. Procédé selon la revendication 14, comprenant l'étape consistant à épaissir les suspensions de pâte avec des fibres et des fines de fabrication de papier dans une première et une deuxième unités de formation (101 ; 201 ; 301 ; 401 ; 501 ; 102 ; 202 ; 302 ; 402 ; 502), chaque unité de formation étant d'un type à double toile et comprenant un rouleau de formation (109 ; 209 ; 309 ; 409 ; 509 ; 111 ; 211 ; 311 ; 411 ; 511), et une toile intérieure (105 ; 205 ; 305 ;405 ; 107 ; 207 ; 307 ; 407) et une toile extérieure (106 ; 206 ; 306 ; 406 ; 108 ; 208 ; 308 ; 408) enroulant une partie de la circonférence de chaque rouleau de formation respectif, et formant de ce fait une section courbe initiale d'une zone de formation dans laquelle l'épaississement initial et la formation sont réalisés d'une bobine fibreuse (A ; B) comprenant un côté de toile intérieure (x, z) supporté par la toile intérieure et un côté de toile extérieure (y, w) supporté par la toile extérieure, ledit procédé comprenant en outre les étapes consistant à continuer l'épaississement de la bobine fibreuse formée (A ; B) au moyen d'éléments de drainage supplémentaires (110 ; 210 ; 310 ; 410 ; 513 ; 112 ; 212 ; 312 ; 412 ; 514) dans une section en aval de la section courbe, et joindre les bobines fibreuses (A ; B) à l'aide de moyens de transfert à ventouses (113, 114, 115 ; 213, 214, 215, 313, 314, 315, 327, 413, 414, 415, 427, 513, 514, 515) pour former une bobine multicouche (C), destinée à être comprise dans ou à constituer ladite bobine de papier ou de carton multicouche (D) après pressage et séchage, comprenant l'étape consistant à
    choisir des rouleaux de formation ouverts (109, 111 ; 209, 211 ; 309, 311 ; 409, 411 ; 509, 511) pour l'épaississement initial, les adapter de sorte que la teneur en fines dans les bobines fibreuses (A ; B) devient au moins aussi élevée au niveau du côté de toile intérieure (x, z) qu'au niveau du côté de toile extérieure (y, w) pendant l'épaississement initial, adapter les éléments de drainage supplémentaires (110 ; 210 ; 310 ; 410 ; 513 ; 112 ; 212 ; 312 ; 412 ; 514) de sorte que la teneur en fines est maintenue au moins sensiblement inchangée à un niveau élevé au niveau du côté de toile intérieure (x, z) pendant l'épaississement continu, et joindre les deux bobines fibreuses formées (A ; B) avec les côtés de toile intérieure (x, z) l'un contre l'autre.
  16. Procédé selon la revendication 15, comprenant l'étape consistant à réaliser l'épaississement initial de sorte qu'il entraîne une siccité desdites suspensions de pâte qui est entre 2 et 3 %.
  17. Procédé selon la revendication 15 ou 16, comprenant l'étape consistant à
    réaliser l'épaississement continu principalement dans un sens vers les côtés de toile extérieure (y, w) desdites bobines fibreuses (A, B).
  18. Procédé selon l'une quelconque des revendications 15 à 17, comprenant l'étape consistant à
    réaliser l'épaississement continu de sorte qu'il entraîne une siccité des bobines fibreuses (A ; B) qui est supérieure à environ 6 à 8 %.
  19. Procédé selon la revendication 15, comprenant les étapes consistant à
    choisir des rouleaux de formation (509, 511) présentant un diamètre d'environ 1,4 à 1,8 m, adapter l'enroulement de toile autour du rouleau de formation pour qu'il soit d'au moins 80°, réaliser l'épaississement initial pour entraîner une siccité desdites suspensions de pâte de l'ordre de 6 %, réaliser l'épaississement continu pour entraîner une siccité des bobines fibreuses (A ; B) qui est supérieure à environ 6 à 8 %, et accomplir l'épaississement continu à l'aide d'un ou plusieurs desdits moyens de transfert à ventouses (513, 514).
  20. Procédé selon l'une quelconque des revendications 15 à 17, comprenant l'étape consistant à
    utiliser quelques-uns des moyens de transfert à ventouses (113, 114 ; 213, 214 ; 313, 314, 327; 413, 414, 427) pour réaliser un épaississement supplémentaire après l'épaississement continu de manière à atteindre une siccité supérieure à environ 8 à 10 % des bobines fibreuses (A, B) avant qu'elles ne soient jointes dans la bobine fibreuse multicouche (C).
  21. Procédé selon l'une quelconque des revendications 15 à 20, comprenant les étapes consistant à
    transférer une première bobine fibreuse (A) depuis la toile intérieure (105 ; 205) vers la toile extérieure (106 ; 206) de la première unité de formation (101 ; 201), et transférer une deuxième bobine fibreuse (B) depuis la toile intérieure (107 ; 207) vers la toile extérieure (108 ; 208) de la deuxième unité de formation (102 ; 202), pour qu'elle soit transférée de là sur la première bobine fibreuse (A).
  22. Procédé selon l'une quelconque des revendications 15 à 21, comprenant l'étape consistant à
    former en outre une couche inférieure (E) sur au moins une toile inférieure (330 ; 430) et transférer ensuite la première bobine fibreuse (A) sur la couche inférieure (E).
  23. Procédé selon la revendication 22, comprenant l'étape consistant à transférer la première bobine fibreuse (A) depuis la toile extérieure (306 ; 406) vers la toile intérieure (305 ; 405) de la première unité de formation (301 ; 401) avant de transférer ladite première bobine fibreuse (A).
  24. Procédé selon l'une quelconque des revendications 15 à 23, comprenant l'étape consistant à
    former en outre une couche supérieure (F) sur au moins une toile supérieure (224 ; 424), et transférer ensuite ladite couche supérieure (F) sur la deuxième bobine fibreuse (B).
EP00986164A 1999-12-15 2000-12-15 Agencement et procede de formation d'une bande de papier ou de carton multicouches Expired - Lifetime EP1266087B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
SE9904605 1999-12-15
SE9904605A SE516329C2 (sv) 1999-12-15 1999-12-15 Arrangemang och förfarande för formning av en flerskiktad pappers- eller kartongbana
US17197999P 1999-12-23 1999-12-23
US171979P 1999-12-23
PCT/SE2000/002570 WO2001044569A1 (fr) 1999-12-15 2000-12-15 Agencement et procede de formation d'une bande de papier ou de carton multicouches

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Publication Number Publication Date
EP1266087A1 EP1266087A1 (fr) 2002-12-18
EP1266087B1 true EP1266087B1 (fr) 2006-07-26

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EP00986164A Expired - Lifetime EP1266087B1 (fr) 1999-12-15 2000-12-15 Agencement et procede de formation d'une bande de papier ou de carton multicouches

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EP (1) EP1266087B1 (fr)
JP (1) JP2003528990A (fr)
CN (1) CN1208515C (fr)
AT (1) ATE334259T1 (fr)
AU (1) AU778169B2 (fr)
CA (1) CA2394283C (fr)
DE (1) DE60029639T2 (fr)
WO (1) WO2001044569A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10232125A1 (de) * 2002-07-16 2004-02-05 Voith Paper Patent Gmbh Siebpartie zur Herstellung einer mehrlagigen Faserstoffbahn
DE102008040688A1 (de) * 2008-07-24 2010-01-28 Voith Patent Gmbh Verfahren zur Optimierung der Energiebilanz in Formiereinheiten in Maschinen zur Herstellung von Faserstoffbahnen und Formiereinheit
WO2012041392A1 (fr) * 2010-10-01 2012-04-05 Metso Paper, Inc. Dispositif et procédé pour fabriquer un film constitué par de multiples couches
JP5716378B2 (ja) 2010-12-17 2015-05-13 王子ホールディングス株式会社 繊維シートの製造装置
CN104213476B (zh) * 2014-08-18 2016-08-31 湖北欧华达纤维科技股份有限公司 高密度环保再生纤维板及其生产方法
AT519242B1 (de) * 2017-02-03 2018-05-15 Andritz Ag Maschf Verfahren zur herstellung einer mehrlagigen faserstoffbahn mit weisser decklage
CN107460760B (zh) * 2017-09-13 2019-03-01 长兴恒大电子材料有限公司 一种热转移纸生产加工工艺
DE102022107202A1 (de) 2022-03-28 2023-09-28 Voith Patent Gmbh Mehrlagenfaserstoffbahn

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1722503A (en) * 1925-07-06 1929-07-30 William H Millspaugh Paper-making method and machine
US5468348A (en) * 1990-07-10 1995-11-21 Beloit Technologies, Inc. Multi-ply web former and method
DE4031038C2 (de) * 1990-10-01 1997-01-23 Voith Sulzer Papiermasch Gmbh Vorrichtung zum Herstellen eines mehrlagigen Papiers oder Kartons
DE4402274C2 (de) * 1994-01-27 1995-04-06 Voith Gmbh J M Doppelsiebpartie
DE4402273C2 (de) * 1994-01-27 1995-11-23 Voith Gmbh J M Papiermaschine zur Herstellung mehrlagiger Papierbahnen
DE19651493A1 (de) * 1996-12-11 1998-06-18 Voith Sulzer Papiermasch Gmbh Siebpartie und Verfahren zum Formen einer mehrlagigen Faserstoffbahn
DE19920438A1 (de) * 1999-05-04 2000-11-09 Voith Sulzer Papiertech Patent Verfahren und Vorrichtung zum Herstellen einer mehrlagigen Faserstoffbahn

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ATE334259T1 (de) 2006-08-15
DE60029639D1 (de) 2006-09-07
CA2394283A1 (fr) 2001-06-21
CN1409787A (zh) 2003-04-09
CA2394283C (fr) 2008-08-12
AU2245001A (en) 2001-06-25
DE60029639T2 (de) 2007-07-26
EP1266087A1 (fr) 2002-12-18
WO2001044569A1 (fr) 2001-06-21
CN1208515C (zh) 2005-06-29
AU778169B2 (en) 2004-11-18
JP2003528990A (ja) 2003-09-30

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