EP3963135A1 - Feutre piqué et utilisation de feutre piqué dans une machine à papier à usage sanitaire et domestique - Google Patents

Feutre piqué et utilisation de feutre piqué dans une machine à papier à usage sanitaire et domestique

Info

Publication number
EP3963135A1
EP3963135A1 EP20712875.2A EP20712875A EP3963135A1 EP 3963135 A1 EP3963135 A1 EP 3963135A1 EP 20712875 A EP20712875 A EP 20712875A EP 3963135 A1 EP3963135 A1 EP 3963135A1
Authority
EP
European Patent Office
Prior art keywords
seam
threads
felt
machine
seam felt
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.)
Pending
Application number
EP20712875.2A
Other languages
German (de)
English (en)
Inventor
Susanne Klaschka
Robert Eberhardt
Hubert Walkenhaus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP3963135A1 publication Critical patent/EP3963135A1/fr
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts
    • 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
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D21F3/0227—Belts or sleeves therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0281—Wet presses in combination with a dryer roll
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/10—Seams thereof

Definitions

  • the invention relates to a seam felt for a machine for producing a tissue web according to the preamble of claim 1, as well as a machine and a method for producing a tissue web with such a covering.
  • EP 1 167 115 B1 A machine of the type typically used in tissue production is described in EP 1 167 115 B1.
  • a fiber suspension is applied between two fabrics and drained by suction.
  • the fibrous web is then further dewatered in a press and then further thermally dried.
  • the water pressed out of the web is absorbed by the covering and removed from the covering again after the fibrous web has been removed.
  • this is done by means of suction boxes, the so-called Uhle boxes.
  • the fibrous web is formed on the same covering in the former and then transported into the press.
  • EP 1 167 115 describes this covering as a water-absorbing carrier tape.
  • This support tape is usually a felt, which is also referred to as a forming felt.
  • Another object of the invention is to propose a conversion solution for existing systems that can be implemented with little or no effort.
  • the object is achieved by means of seam felt for use in a machine for setting a tissue web.
  • the seam felt comprises a single-layer or multi-layer - in particular two-layer basic structure, which has a textile structure with MD threads, which form seam loops on the two front edges of the basic structure, the seam felt being made endless by connecting its front edges by means of a seam, and this seam can be carried out by interlocking the seam loops of both front edges and inserting a plug-in element.
  • the seam felt comprises at least one layer of fleece fibers.
  • the MD threads entirely or predominantly have a diameter between 0.25mm and 0.45mm, in particular between 0.3mm and 0.35mm and the thread density of the MD threads is more than 37%, in particular between 37% and 45%, in particular a felt, for use in a machine for felling a Tissue web.
  • the seam felt comprises a basic structure which has a textile structure with MD threads. Furthermore, the seam felt comprises at least one layer of fleece fibers.
  • the MD threads wholly or predominantly have a diameter between 0.25mm and 0.45mm, in particular between 0.3mm and 0.35mm, and the thread density of the MD threads is more than 37%, in particular between 37% and 45%.
  • the term “wholly or predominantly” should be understood to mean that at least 90% of the MD threads, preferably 95%, in particular all MD threads, have a diameter in the specified range.
  • diameter of a thread is used. This term is well defined for round threads.
  • the diameter of the thread should be understood to mean the diameter of the smallest circle that includes the cross section of the thread.
  • the number of threads per unit of length is multiplied by their diameter and the value is set in relation to the unit of length.
  • a seam felt according to one aspect of the invention can be used as a forming felt in a tissue machine.
  • the short service life of conventional seam felts when used as forming felt is due to the fact that they have a comparatively thick fleece layer. At the seam, however, this fleece layer is not continuous, as is the case with the rest of the felt, but rather separate. This creates a joint or an overlap, but always a weak point. If the material jet of the headbox hits this weak point, fleece fibers can loosen at this weak point. The further away the fleece fibers are from the basic structure, the weaker the anchoring of these fibers.
  • the basic structure can take over part of the functionality that is otherwise taken over in the covering by one or more fleece layers, such as an equalization of the pressure
  • the basic structure enables even pressure distribution through the felt, which was previously not possible.
  • felts in particular seamed felts with such basic structures, can get by with a smaller fleece overlay.
  • reducing the thickness of the fleece layer improves the stability of the seam.
  • the thinner fleece overlay offers less contact surface for the fabric jet.
  • the particularly susceptible fleece fibers of the fleece layers that are far away from the basic structure are eliminated, and the service life of the forming felt in the tissue machine is significantly increased!
  • the weight of the felt is preferably between 750 g / m 2 and 1250 g / m 2 , in particular between 900 g / m 2 and 1100 g / m 2 . In special cases, weights of up to 1400 g / m 2 are also possible.
  • This is the total weight of the basic structure and, if available, fleece layers. It is very advantageous for the invention if the weight fraction of the fleece layers corresponds at most to the weight fraction of the basic structure, in particular at most 2/3 of the weight fraction of the basic structure. In the case of felts for tissue production, the proportion by weight of the nonwoven fibers is usually greater than that of the basic structure. Usually 60% of the total weight is fleece fibers and 40% basic structure.
  • the covering can have a thickness of 3.5mm and less, preferably between 2.5mm and 3mm! The thickness is determined under a pressure of 0.1 MPa.
  • Felts are used in which the basic structure and fleece layers each make up 50% of the weight.
  • the basic structure can even make up the greater part of the weight of the felt. If 60% of the total weight comes from the basic structure and only 40% from the fleece fibers, then the weight fraction of the fleece layers corresponds to only 2/3 of the weight fraction of the basic structure.
  • the fleece layers are strongly compressed over the service life of the felt, resulting in essential covering properties such as the permeability can be reduced.
  • essential covering properties such as the permeability
  • the weight of the fleece overlay is less than 600 g / m 2 , in particular less than 500 g / m 2 , especially 450 g / m 2 or less.
  • the weight of the fleece overlay on the paper side of the felt is less than 600 g / m 2 , in particular less than 500 g / m 2 , especially 450 g / m 2 or less. Since the material jet of the headbox hits the paper side, reducing the fleece overlay on the paper side is particularly advantageous.
  • the textile structure can advantageously consist of a woven fabric, a leno weave, a scrim or knitted fabric, or comprise such a fabric.
  • the textile structure is a flat woven fabric, the warp threads of the loom being the MD threads of the seam felt.
  • the flat woven fabric can have a plain weave, for example. If a fabric is used as the basic structure, it should be pointed out that circular fabrics are usually used for the basic structures of coverings. These circular fabrics are rotated by 90 ° for installation in the machine. As a result, the weft threads of the loom become the MD threads of the covering and the warp threads become the CD threads.
  • a two-layer structure When producing a seam covering, a two-layer structure can be formed from the circular fabric by laying it on itself. Seam loops can be formed on the front edges of the two-layer structure, for example by removing one or more CD threads.
  • An alternative is to use a flat woven fabric.
  • the flat woven fabric can be made endless by connecting the front ends.
  • a two-layer structure can be formed again by placing it on itself. Seam loops can be formed on the front edges of the two-layer structure by removing one or more CD threads.
  • the warp threads in a loom can in principle be arranged as close to one another as desired, two adjacent weft threads are therefore inevitable at a distance from one another so that the warp threads - for example in the case of a plain weave - change between each pair of weft threads from top to bottom or vice versa. Due to this compulsory spacing of the weft threads together with the 90 ° rotation, such an MD thread density is not possible, or only possible with great difficulty, when using very thin threads with conventional circular fabrics. In the case of flat woven fabrics, on the other hand, the warp threads serving as MD threads can be arranged as close to one another as desired, so that coverings with the properties described in the invention can be produced comparatively easily.
  • the flat woven fabric can be made endless in advantageous embodiments by connecting the front ends.
  • This connection can in particular take place by means of a welded connection.
  • Ultrasonic welding and laser welding, in particular laser transmission welding, have proven to be suitable welding processes here.
  • This can be, for example, one or more thread (s) which are arranged in the CD direction and connected, in particular welded, to the MD threads of the two ends.
  • the basic structure can consist of a textile structure or further elements.
  • the basic structure can also contain other textile structures such as have further tissue.
  • Various materials can be used for the MD threads. Polyamides such as PA 6, PA 6.6 are suitable, but other polymers such as PET. If CD threads are present, these can be made up of the same or a different polymer.
  • MD threads are of the same type. However, different types of MD threads can also be used. In this way, for example, the fiber anchoring or the dimensional stability can be influenced. MD threads are advantageously monofilaments. There are also various options when choosing the CD threads. In addition to monofilaments, multifilaments or threads can also be used.
  • Suitable threads can consist of 4 or 6 filaments.
  • the filaments used can have a diameter of 0.15-0.25 mm.
  • 0.2 x 2 x 2 threads are very suitable.
  • all CD threads can be designed as twisted threads. All CD threads can consist of the same thread. Alternatively, different threads can be used
  • twines and monofilaments are used as CD threads. Preferably around 50% of the CD threads or more are designed as twine.
  • twisted threads and monofilaments can be provided alternately as CD threads.
  • the proportion of twisted threads in the CD threads is 50% - or just below that if, for technical reasons, individual CD threads e.g. must be removed to form the seam loops.
  • coverings in particular seam felts, which are very thin (less than 3.5mm, or even between 2.5mm and 3mm) and still have full functionality, can be produced very easily.
  • the felt can have one or more fleece layers.
  • the layer or layers can be arranged on the paper side and / or the running side of the felt.
  • the paper side of the seam felt it will be necessary for the paper side of the seam felt to have a certain amount of fleece fibers. This amount should not be less than 10% of the total weight of the covering. It is also advantageous to provide fleece fibers with a fineness between 11 and 22 dtex, at least for the upper side of the felt in contact with the paper.
  • the fleece fibers can be made of any suitable material, in particular a polyamide, but also an elastomer such as e.g. a thermoplastic polyurethane (TPU), melt fibers, bicomponent fibers or mixtures thereof.
  • TPU thermoplastic polyurethane
  • the object is achieved by a machine for producing a tissue web which comprises a former.
  • the machine has at least one seam felt according to one aspect of the invention.
  • the seam felt is arranged so that it runs through the former when the machine is in operation.
  • Tissue papers are usually made of cellulose and are very light papers.
  • the mass per unit area is usually between 15 g / m 2 and 30 g / m 2 , but values of 10 g / m 2 or 5 g / m 2 are also possible, as are papers with more than 30 g / m 2 .
  • the machine includes a so-called crescent former. Furthermore, it can be provided in advantageous embodiments that the machine has a press device with at least one press nip, and the seam felt is arranged such that it passes through the at least one press nip when the press device is in operation.
  • the fibrous web can then be transported on the seam felt into a press device, where further dewatering takes place in the press nip.
  • the press device preferably has a long nip, in particular a shoe nip.
  • the dwell time of the web in the nip is longer here.
  • lower pressing pressures in particular can be used. This is important in the production of tissue papers, since it maintains the volume of the web, which is an important quality parameter in tissue papers.
  • the seam felt according to one aspect of the invention can have two advantages in a tissue machine.
  • the thinner fleece layer enables a longer service life of the felt despite the loads from the former.
  • the thinner felt in the press enables additional nip dewatering of the tissue web
  • the pressing device has a waste water catcher which is set up to collect water which has been removed from the tissue web in the at least one press nip.
  • the dewatering performance of the press can also be increased by the fact that nip dewatering takes place in addition to the usual Uhle box dewatering. In doing so, water (or a water-air mixture) from the tissue web is not only pressed into the felt, but through the felt. While the remaining part of the squeezed out water is transported with the felt to a Uhle box, which is usually located downstream, this water escapes into the environment as splash water or spray mist after the press nip.
  • nip drainage This Part of the drainage is called nip drainage.
  • waste water traps in the press device. These are arranged in such a way that the splash water can be caught and transported away.
  • the dewatering performance of the press device can be significantly increased with very little effort, even with existing tissue machines.
  • the object is achieved by a method for producing a tissue web using a machine according to one aspect of the invention.
  • part of the drainage takes place in the pressing device in the form of nip drainage, and this water thus drained is wholly or partially collected by a sewage trap.
  • the nip drainage makes up more than 10%, in particular between 20% and 50% of the total drainage quantity of the pressing device.
  • the tissue machine is operated at a high speed of more than 1200 m / min, in particular more than 1500 m / min or 1800 m / min.
  • a dry content that is too low after the press is the limiting factor in increasing the production speed.
  • the high production speed of the tissue machine requires a high jet speed in the headbox.
  • the higher strength of the seam or the fleece overlay of the seam is particularly advantageous here.
  • FIG. 1 shows a tissue machine according to one aspect of the invention.
  • FIG. 2 shows the seam area of a seam felt according to one aspect of the invention
  • FIG. 1 shows a tissue machine 1 according to one aspect of the invention.
  • a fiber suspension is applied via a headbox onto a clothing 2, or between a clothing 2 and an outer screen 22.
  • the covering 2 is designed as a forming felt 2 in the form of a seam felt 2.
  • a former 20 an initial dewatering takes place with the aid of a suction forming roller 21 which is partially wrapped by the forming felt 2.
  • the former 20 is designed as a crescent former 20 in FIG. 1, but other types of former are also possible.
  • the resulting fibrous mat is then transported into the press device 30, supported by the forming felt 2.
  • FIG. 1 shows a tissue machine 1 according to one aspect of the invention.
  • the press device 30 is designed as a shoe press 30.
  • the press nip 31 is between the shoe roll 34 and a Yankee cylinder 41.
  • the forming felt 2 passes the press nip 31 together with the tissue web 3.
  • the web 3 continues to run on the surface of the Yankee cylinder 41.
  • a drying hood is arranged on the Yankee cylinder 41 42.
  • the web 3 is detached from the Yankee cylinder 41 by means of a creping doctor 43 and transported on to a reel 60.
  • a scanner 50 or another suitable measuring device 50 can be provided in front of the reel 60, with which important parameters of the fibrous web 3 such as thickness, moisture or weight per unit area are recorded.
  • the covering 2 of the machine 1 shown in FIG. 1 is advantageously a seam felt 2 according to one aspect of the invention. It can advantageously comprise a basic structure 100 made of a flat fabric 110, in particular a canvas fabric, which is made endless by joining - for example welding - the front ends and a two-layer structure 100 is formed by being deposited on itself.
  • the MD threads of this basic structure 100 all have a diameter between 0.25mm and 0.45mm, in particular between 0.3mm and 0.35mm.
  • the thread density of the MD threads is more than 37%, preferably between 37% and 45%, particularly preferably between 39% and 43%.
  • the fleece overlay 200 can be reduced so that it is only half the weight or less of the felt 2.
  • the weight of the fleece overlay 200 on the paper side of the seam felt 2 or even of the entire seam felt 2 can be less than 600 g / m 2 , in particular less than 500 g / m 2 , especially 450 g / m 2 or less.
  • a covering 2 since in a covering 2 according to one aspect of the invention the basic structure 100 takes over parts of the function of the fleece layers 200, this covering 2 can be made very thin. As a result, the seam 150 or joint 210 offers less contact surface for the material jet. In addition, the particularly susceptible nonwoven fibers of the nonwoven layers that are far away from the basic structure 100 are eliminated, and the service life of the forming felt 2 in the tissue machine 1 is significantly increased!
  • nip drainage can be achieved.
  • a wastewater trap 33 is arranged after the press nip 31.
  • a waste water trap 33 can also be provided in front of the press nip 31.
  • the wastewater trap or traps 33 take the portion of the water which was removed from web 3 by nip dewatering. The remaining part is stored in the clothing 2 and transported away from the press nip 31.
  • a suction box 32 In order to remove this water from the covering 2, a suction box 32, a so-called Uhle box 32, is provided in the system shown in FIG. 1 between the press nip 31 and the headbox 10 more than 10%, preferably between 20% and 50% of the total dewatering of the press 30.
  • FIG. 2 shows a section from a seam felt 2 according to one aspect of the invention.
  • the felt 2 shown here consists of a basic structure 100 and a fleece layer 200 on the paper side of the felt 2.
  • the fleece layer 200 can comprise one or more layers of fleece fibers.
  • another fleece layer which is not shown in FIG. 2, can be provided on the running side of the felt 2.
  • the basic structure 100 in FIG. 2 is a woven basic structure 100.
  • a flat woven fabric 100 can be folded onto itself in such a way that the two-layer basic structure shown results.
  • the ends of the flat woven fabric 110 are advantageously connected to one another, e.g. by a welded connection.
  • Seam loops 120 are formed on the front edges of the two-layer basic structure 100 thus created.
  • one or more CD threads can be removed from the tissue.
  • the seam loops 120 are interlocked and can be connected to one another by an element such as a pintle wire 130.
  • This nonwoven layer 200 cannot be continuous at the seam 150, but has an abutment point 210 (possibly in the form of an overlap point 210).
  • This joint 210 is very critical, particularly when it is used as a forming felt 2.
  • the material jet of the headbox 10 can widen the joint or detach nonwoven fibers, since in the seam area 150 the anchoring of the outer nonwoven fibers in particular is reduced.
  • the basic structure 100 can now assume parts of the function of the nonwoven layer 200 such as the equalization of the pressure. Among other things, this has the consequence that the fleece layer 200 is thinner can be executed. This makes it more difficult for the jet of material to penetrate the joint 210.
  • the nonwoven fibers are located on average less far from the fabric of the basic structure 100, as a result of which the anchorage is improved. This enables a seam felt 2 to be used as a forming felt 2 of a tissue machine 1 with a considerably improved service life.

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  • Paper (AREA)

Abstract

L'invention concerne du feutre piqué s'utilisant dans une machine destinée à la fabrication d'une bande de papier à usage sanitaire et domestique, ledit feutre piqué comprenant une structure de base monocouche ou multicouche qui présente une structure textile dotée de fils MD qui forment des boucles piquées sur les deux arêtes frontales de la structure de base, l'habillage pouvant être réalisé en continu par liaison de ses arêtes frontales au moyen d'une couture, et cette couture étant réalisée par interpénétration des boucles piquées des deux arêtes frontales et par introduction d'un élément d'insertion, le feutre piqué comprenant également au moins une couche de fibres de non-tissé, l'invention se caractérisant en ce que les fils MD présentent en totalité ou majoritairement un diamètre compris entre 0,25 et 0,45 mm, en particulier entre 0,3 et 0,35 mm et en ce que le titrage des fils mD est supérieur à 37%, en particulier compris entre 37 et 45%. L'invention concerne en outre une machine et un procédé correspondant pour la fabrication d'une bande de papier à usage sanitaire et domestique.
EP20712875.2A 2019-05-03 2020-03-12 Feutre piqué et utilisation de feutre piqué dans une machine à papier à usage sanitaire et domestique Pending EP3963135A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019111443 2019-05-03
PCT/EP2020/056719 WO2020224835A1 (fr) 2019-05-03 2020-03-12 Feutre piqué et utilisation de feutre piqué dans une machine à papier à usage sanitaire et domestique

Publications (1)

Publication Number Publication Date
EP3963135A1 true EP3963135A1 (fr) 2022-03-09

Family

ID=69903119

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20712875.2A Pending EP3963135A1 (fr) 2019-05-03 2020-03-12 Feutre piqué et utilisation de feutre piqué dans une machine à papier à usage sanitaire et domestique

Country Status (4)

Country Link
US (1) US20220228318A1 (fr)
EP (1) EP3963135A1 (fr)
CN (1) CN113825875A (fr)
WO (1) WO2020224835A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019111441A1 (de) * 2019-05-03 2020-11-05 Voith Patent Gmbh Bespannung und Verwendung in einer Tissuemaschine

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Publication number Priority date Publication date Assignee Title
GB8814436D0 (en) 1988-06-17 1988-07-20 Scapa Group Plc Papermachine clothing
DE19756422A1 (de) * 1997-12-18 1999-06-24 Voith Sulzer Papiertech Patent Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn
ES1046675Y (es) 2000-06-27 2001-06-16 Play Sa Silla infantil.
CA2391027A1 (fr) * 2001-06-20 2002-12-20 Rene Marchand Feutre de papeterie a tige cousue ayant un tissu de base lamine a fils a sens machine a bas point de fusion
US7407564B2 (en) * 2002-11-15 2008-08-05 Albany International Corp. Stratified press fabric
JP5062815B2 (ja) * 2006-11-01 2012-10-31 イチカワ株式会社 湿紙搬送用ベルト
DE102011004565A1 (de) * 2011-02-23 2012-08-23 Voith Patent Gmbh Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn
DE102011007568A1 (de) * 2011-04-18 2012-10-18 Voith Patent Gmbh Vorrichtung und Verfahren zur Herstellung einer Materialbahn
EP2761069B1 (fr) * 2011-09-27 2016-07-20 AstenJohnson, Inc. Tissu de séchage à traversée d'air semi-recto-verso à dix foules
PL2602387T3 (pl) 2011-12-07 2017-01-31 Valmet Aktiebolag Maszyna papiernicza, walec o przedłużonej strefie styku i sposób wytwarzania bibułki
US9005399B2 (en) * 2013-01-10 2015-04-14 Huyck Licensco, Inc. Pin seamed press felt with triple layer base fabric
EP2895322B1 (fr) * 2013-04-19 2016-12-21 AstenJohnson, Inc. Feutre de presse cousu comprenant une couche de support élastique et son procédé de fabrication
US10273635B2 (en) * 2014-11-24 2019-04-30 First Quality Tissue, Llc Soft tissue produced using a structured fabric and energy efficient pressing
US20170044718A1 (en) * 2015-08-13 2017-02-16 Voith Patent Gmbh Fabric for a machine for producing a fiber web
AT517330B1 (de) * 2015-10-06 2017-01-15 Andritz Ag Maschf Verfahren zur herstellung einer faserstoffbahn
DE102016206384A1 (de) * 2016-04-15 2017-10-19 Voith Patent Gmbh Bespannung und Verfahren zum Herstellen einer Bespannung

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Publication number Publication date
US20220228318A1 (en) 2022-07-21
WO2020224835A1 (fr) 2020-11-12
CN113825875A (zh) 2021-12-21

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