WO2010057802A2 - Toile de machine à papier et son procédé de réalisation - Google Patents

Toile de machine à papier et son procédé de réalisation Download PDF

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Publication number
WO2010057802A2
WO2010057802A2 PCT/EP2009/064833 EP2009064833W WO2010057802A2 WO 2010057802 A2 WO2010057802 A2 WO 2010057802A2 EP 2009064833 W EP2009064833 W EP 2009064833W WO 2010057802 A2 WO2010057802 A2 WO 2010057802A2
Authority
WO
WIPO (PCT)
Prior art keywords
fabric
reinforcement module
transverse
longitudinal
length
Prior art date
Application number
PCT/EP2009/064833
Other languages
German (de)
English (en)
Other versions
WO2010057802A3 (fr
Inventor
Uwe Köckritz
Hubert Walkenhaus
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41697944&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2010057802(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE200810043855 external-priority patent/DE102008043855A1/de
Priority claimed from DE200910002175 external-priority patent/DE102009002175A1/de
Application filed by Voith Patent Gmbh filed Critical Voith Patent Gmbh
Priority to BRPI0916035A priority Critical patent/BRPI0916035A2/pt
Priority to EP09748122.0A priority patent/EP2358939B1/fr
Priority to CN2009801460885A priority patent/CN102325939A/zh
Publication of WO2010057802A2 publication Critical patent/WO2010057802A2/fr
Priority to US13/111,291 priority patent/US20110294386A1/en
Publication of WO2010057802A3 publication Critical patent/WO2010057802A3/fr

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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
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/10—Seams thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/50—FELT FABRIC

Definitions

  • the invention relates to a paper machine clothing, in particular a press felt for a paper, board or Tissuemaschine, according to the preamble of patent claim 1 and a method for its production according to the preamble of claim 31.
  • Paper machine clothing in particular press felts for paper, board or tissue machines, generally have a basic structure providing the dimensional stability of the felt, which is provided on both sides with one or more nonwoven layers.
  • modules are proposed, which are composed of a nonwoven layer connected to a Leksfadengelege, as well as modules that consist of a connected to a nonwoven fabric layer Querfadengelege.
  • Transverse reinforcement module to be used transverse stability module to be used from a plurality of only a portion of the length of the press felt extending Querverstär- kk modules that are also produced in a first manufacturing step via a winding process as the longitudinal reinforcement module and which are cut in a subsequent manufacturing step to width of the produced press felt and oriented with the threads transverse to the L Lucassfadengelege in the longitudinal direction of the felt are arranged one behind the other.
  • a disadvantage of such transverse reinforcement structures is that they are produced from a longitudinal thread layer, which must be assembled and cut for use as a transverse reinforcement module and is composed of a plurality of individual sections arranged one behind the other in the longitudinal direction of the press felt.
  • the known modular Pressfilz counselore here consist of Leksfaden- located and Querfaden Quergelegen, the two clutches only one
  • Nonwoven fabric layer are interconnected.
  • the disadvantage of these structures is that such scrims often provide only a very limited internal volume in the press felt. Further, since the longitudinal and the transverse thread loops can move relative to each other, they diverge as they pass through the press nip, which can lead to a further reduction in the internal void volume and therefore a reduction in water absorption capacity.
  • woven basic structures are often much thicker than scrim due to threading at the crosshairs.
  • the object is achieved by a paper machine clothing, in particular press felt for a paper, board or tissue machine, with a load-absorbing basic structure which extends in the longitudinal and transverse direction of the clothing and which is formed from a dimensional stability in the longitudinal direction of the fabric essentially providing longitudinal reinforcement module and from a dimensional stability in the transverse direction of the fabric at least partially providing transverse reinforcement module, wherein the transverse reinforcement module and the longitudinal reinforcement module are arranged and connected to each other.
  • the invention is characterized in that the transverse reinforcement module is formed from at least one warp knit formed from at least one system of weft threads extending parallel to each other in length and at least one system of sewing threads forming stitches substantially perpendicular to the longitudinal extent of the weft threads in which the weft threads are integrated to form a textile fabric, wherein the weft threads extend obliquely in their length, in particular transversely, to the longitudinal direction of the fabric and have a greater flexural rigidity than the sewing threads.
  • the longitudinal reinforcement module and the transverse reinforcement module are manufactured independently of each other.
  • the dimensional stability of the fabric in its longitudinal direction is essentially provided by the longitudinal reinforcement module.
  • the dimensional stability of the fabric in its transverse or width direction is at least partially provided by the transverse reinforcement module.
  • the longitudinal reinforcement module By the term “that the dimensional stability of the fabric in the longitudinal direction of the fabric is provided essentially by the longitudinal reinforcement module” is to be understood that more than 50% of the longitudinal stability of the fabric is provided by the longitudinal reinforcement module note that the longitudinal reinforcement module may also partially contribute to providing the dimensional stability of the fabric in the transverse or width direction of the fabric.
  • transverse reinforcement module that the dimensional stability of the clothing in the transverse direction of the clothing is at least partially provided by the transverse reinforcement module.
  • a textile fabric is to be understood as meaning a self-supporting textile structure which is of planar design, i. whose length and width is significantly greater than its height. It is conceivable in this connection that the width and length are greater than the height by more than a factor of 100, in particular by more than a factor of 1000.
  • the modular paper machine clothing according to the invention has a transverse reinforcement module which at least partially furnishes the transverse stiffness of the clothing.
  • the transverse reinforcement module is constructed from at least one warp knit, which in turn is constructed from at least one weft thread system and from at least one stitch-forming thread system.
  • the warp knitted fabric is arranged such that the weft threads extend obliquely, in particular transversely, to the longitudinal direction of the fabric.
  • the transverse stiffness of the transverse reinforcement module is essentially or almost completely provided by the weft threads, whereas the stitching threads forming the stitches essentially only serve to hold the weft threads in position during the production of the covering.
  • the warp knit fabric can be produced inexpensively as a flat and one-piece warp knit fabric with any longitudinal extension in the direction of sewing threads by knitting process and subsequently be cut to length, for example, to the length of the papermachine fabric to be produced.
  • the warp knit fabric can thus be made in any desired length in its longitudinal direction, which is determined by the direction of the sewing threads. Since the warp knit according to the invention can be produced in the direction of its sewing threads in virtually any length and the dimensionally stable weft threads extend substantially perpendicular to the sewing threads, the invention provides a textile structure which, in contrast to the solution known from EP1837440A1, to provide a transverse reinforcement does not have to be rotated by 90 ° relative to its longitudinal direction.
  • the weft threads are incorporated in the stitching threads forming stitches, the distance between adjacent sewing threads can also be made relatively large, without negatively affecting the bond between the weft threads and the sewing threads. Since in a woven structure, the threads are not meshed with each other, but only by
  • Thread cords are connected to each other, in this the warp threads and weft threads must be arranged quite close to each other, so as not to make the bond between them to unstable.
  • the transverse reinforcement module may be arranged both on the longitudinal reinforcement module, as it may be arranged below the longitudinal reinforcement module, when in the paper machine clothing, the machine side is considered as down and its paper side as above.
  • the transverse reinforcement module Preferably, by the transverse reinforcement module, the dimensional stability of
  • Context that, for example, 70% and more or 85% and more of the transverse stability of the covering is provided by the transverse reinforcement module.
  • the longitudinal reinforcement module is produced as an endless belt.
  • the longitudinal reinforcement module comprises a longitudinal thread loop or is formed by a thread scrim.
  • the longitudinal thread layer it is particularly advantageous for the longitudinal thread layer to be formed from at least one longitudinal thread extending in the longitudinal direction of the fabric and wound helically in the transverse direction of the fabric.
  • the at least one longitudinal thread is wound on the width of the basic structure.
  • the longitudinal reinforcement module comprises or is formed from a scrim
  • the dimensional stability of the scrim in the longitudinal direction of the scrim is generally provided by the longitudinal reinforcement module.
  • the dimensional reinforcement of the fabric in the transverse or width direction of the fabric is substantially provided by the transverse reinforcement module.
  • the scrim is formed by only a single longitudinal thread, it extends substantially in the intended longitudinal direction of the felt and can be wound helically progressively in the direction of the intended width of the felt belt to the intended width of the felt.
  • a L Lucassfadengelege can be formed, in which each winding of the longitudinal thread extends parallel to the preceding and subsequent winding of the longitudinal thread.
  • the longitudinal thread layer is made up of a plurality of longitudinal threads, i. formed from a family of longitudinal threads, so the individual longitudinal threads extend substantially in the intended longitudinal direction of the felt and are juxtaposed in the direction of the intended width of the felt, here, the arrangement of the longitudinal threads in the direction of the intended width of the felt belt progressing helical to be wound to the intended width of the felt.
  • a L Lucassfadengelege be formed in which all longitudinal threads of the arrangement always parallel to each other and in which each winding of each longitudinal thread extends parallel to the preceding and subsequent winding of this longitudinal thread.
  • the longitudinal thread (s) extends substantially in the longitudinal direction of the strip should be understood in the sense of the present invention to mean that the longitudinal thread (s) of the longitudinal thread layer and the longitudinal direction of the felt strip are at an angle of max 10 °, in particular a maximum of 5 °.
  • the longitudinal reinforcement module is formed by a woven and / or knitted fabric and / or spiral screen and / or knitted fabric.
  • the dimensional stability of the clothing in the longitudinal direction of the clothing is essentially provided by the longitudinal reinforcement module.
  • the dimensional stability of the fabric in the transverse or width direction of the fabric is partially provided by the transverse reinforcement module and by the longitudinal reinforcement module.
  • 50% or more of the dimensional stability of the fabric in its transverse or width direction is provided by the longitudinal reinforcement module and, correspondingly, less than 50% by the transverse reinforcement module.
  • a development of the invention further provides that the at least one warp knitted fabric is formed from a single system of mutually parallel weft threads and from a single system of stitches forming stitching. This further simplifies the construction of the transverse reinforcement module.
  • the at least one warp knit fabric is produced in particular by a stitchbonding method in which the weft threads are fed during weft formation by means of weft insertion, in particular by means of parallel weft insertion.
  • parallel weft insertion the weft threads are inserted parallel to one another and fixed by the stitches.
  • the sewing threads also form, in particular, rows of stitches arranged parallel to one another and extending perpendicularly to the weft threads, wherein the stitching threads form stitches
  • each sewing thread forms its own row of stitches, wherein in particular each weft thread is bound into a stitch of each stitch row.
  • the length of the mesh extending in particular in the longitudinal direction of the fabric is infinitely adjustable within wide limits, for example, preferably in the range between about 0.5 mm and 5.0 mm. Since the weft threads are integrated into the stitches of the sewing threads, the spacing between adjacent weft threads can be varied within further limits, according to the required or desired properties of the transverse reinforcement module and / or the required production output in the manufacture of the transverse reinforcement module without the weft threads being held to vary the sewing threads greatly. A preferred embodiment of the invention therefore provides that the spacing of the weft threads from each other is determined by the length of the stitches in the courses.
  • the distance between adjacent weft threads in the production of warp knitted fabric according to the invention is variable so that this can have a weft thread density in the range of about 40 to 200 threads / 10cm, preferably 80-150 threads / 10cm depending on the required properties.
  • weft threads are formed by multifilament yarns.
  • the multifilament yarns can be formed, for example, by twisted monofilament yarns. It is conceivable in this context, for example, that the yarn forming monofilaments of polyamide (PA) are made. Here, for example, 4-ply threads or 10-ply threads as well as all intermediate levels are conceivable. It is also conceivable to form the weft threads as staple fiber yarns.
  • PA polyamide
  • the weft threads may also be formed by monofilament yarns. It is conceivable that the weft threads have a round or square cross-section. It is conceivable in the former case that the weft threads have a circular or oval cross-section. In the second case, the weft threads may have a trapezoidal or rectangular cross-section.
  • the longitudinal threads form seam loops.
  • the longitudinal threads are formed as monofilaments.
  • the transverse threads in such woven basic structures are formed as monofilaments, which is why an anchoring by needling of arranged on the base structure nonwoven layers is often difficult.
  • the anchoring of the nonwoven fabric layers to the basic structure can be significantly improved by needling, since the fibers of the nonwoven fabric layer (n) become entangled in the multifilament yarns during the needling process.
  • the weft threads may also comprise multi-component yarns.
  • a component may be made of a material which has a lower melting temperature than the other component (s).
  • thermoplastic material such as, for example, PA, PP, or PU, which is melted during a thermal treatment and effects an improved anchoring of the fibers of the nonwoven structure in the basic structure.
  • PU / PET bicomponent yarns as a multi-component yarn.
  • a transverse reinforcement structure is produced, which has a high resilience after its compaction in the press nip.
  • all the weft threads of the warp knit forming the transverse reinforcing structure are multi-component yarns.
  • twisted monofilament yarns one of the monofilaments being a multicomponent yarn.
  • the weft yarns comprise staple fiber yarns, with some of the staple fibers being of a material having a lower melting temperature than other fibers of the yarn.
  • weft yarns contain the PU or are formed from these and to use PA yarns.
  • PA yarns for example, it is conceivable to use monofilament yarns of PU and a plurality of monofilament yarns of PA twisted together, for example 4-fold yarns of PA.
  • PU yarns and PA yarns can be alternately entered. It is also conceivable to enter PU yarns and PA yarns at the same time.
  • the transverse reinforcement is essentially taken over by the PA yarns, the PU yarns essentially providing the resilience and damping properties of the transverse reinforcement module.
  • the twisted weft threads may have a fineness in the range of about 50-500 tex, especially about 100-400tex.
  • a fineness is conceivable which, for example, in the range of about 15-200tex, in particular about 48-120tex, is located.
  • the sewing threads can be formed as monofilament yarns, as staple fiber yarns or as multifilament yarns. It is also conceivable that the sewing threads comprise multiple components yarns or are formed from these.
  • the multi-component yarns may in this case comprise a component which has a lower melting temperature than the other component (s).
  • the low melting component may be a hot melt adhesive component which is often a thermoplastic material.
  • the sewing threads are made of a material which is lower melting than the materials of the weft threads and the nonwoven structure brought into contact with the basic structure. Through these measures, the anchoring of the fiber fleece structure in the basic structure in conjunction with a thermal treatment can be significantly improved. The thermal treatment can take place here with or without the action of pressure.
  • the sewing threads are made of a material which can be removed from the material after completion of the paper machine clothing, for example with a solvent.
  • a solvent is, for example, water conceivable.
  • a further embodiment of the invention provides that changes the density of the sewing threads in the transverse direction of the fabric. It is conceivable, in particular, that the density of the sewing threads in the edge regions of the transverse reinforcement module running along the longitudinal edges of the basic structure is increased with respect to the middle region of the transverse reinforcement module arranged between the two edge regions. Due to the increased density of the sewing threads in the two edge regions viewed in the transverse direction of the clothing, it is, for example, possible to reduce effects such as edge flipping or edge curl. Furthermore, the edge wear of the fabric can be significantly reduced by an improved anchoring of the fibers of a nonwoven fabric layer to the basic structure.
  • the papermachine clothing according to the invention may, for example, be a press felt which is seamable in the machine.
  • a press felt which is seamable in the machine.
  • By providing an out At least one warp knit formed transverse reinforcement structure it comes when needling the nonwoven fabric structure to a significantly better anchoring of the nonwoven structure to the basic structure as in press felts with basic structures without knit structure, such as, for example, woven basic structures.
  • the so-called "peel-back" effect in the seam area can at least be reduced, if not completely prevented.
  • hot-melt adhesive fibers are additionally used in the transverse reinforcement module, the connection between the basic structure and the fiber-fleece structure is further improved.
  • warp knit is limited in length by two transverse edges running transversely to the longitudinal direction of the papermachine fabric.
  • the warp knit can be cut in its length to about the length of the circumference of the fabric to be produced.
  • the transverse reinforcement module comprises at least one warp knit extending along the length of the fabric.
  • the transverse reinforcement module is formed from a single warp knit extending along the length and width of the fabric.
  • the transverse reinforcement module of several be.
  • two, juxtaposed warp knitted fabric is constructed, which are placed at their mutually facing longitudinal edges on impact and, for example, are interconnected by a connecting strip, which covers the longitudinal edges laid on shock and thus connects the two warp knit together.
  • the transverse reinforcement module is formed of a plurality of each extending over the length of the fabric and only on a portion of the width of the fabric warp knitted fabric, which are juxtaposed in the transverse direction of the fabric, are arranged together complementary to the width of the fabric.
  • the transverse reinforcement module can also be formed from a single warp knit having a width smaller than the width of the fabric, which is wound helically in the transverse direction of the fabric substantially in the longitudinal direction of the fabric.
  • the warp knit may be in the form of a roll which is cut to length in accordance with the requirement, for example the length of the fabric to be produced.
  • the transverse edges are preferably placed to each other in shock.
  • the warp knit is made in particular by means of a connecting strip endless by the connecting strip covers the two abutting transverse edges and is connected in the region of the two transverse edges with the warp knit.
  • a preferred embodiment of the invention provides that in the region of at least one of the transverse edges, a strip of material is connected to the warp knit, one edge flush with the Cross edge runs.
  • a fraying of the respective transverse edge of preventing material grooves is attached to both transverse edges.
  • the connecting strip and / or the material strip is or are preferably formed from at least one film and / or a spunbonded nonwoven.
  • This may be, for example, a film of polyamide (PA), polyamide copolymer (CoPA), polyethylene terephthalate (PET), polyethylene terephthalate copolymer (CoPET), polyurethane (PU), ethylene vinyl acetate (EVA), polypropylene (PP), thermoplastic polyurethane ( TPU) or polyvinyl acetate (PVA) act.
  • PA polyamide
  • CoPA polyamide copolymer
  • PET polyethylene terephthalate
  • CoPET polyethylene terephthalate copolymer
  • PU polyurethane
  • EVA ethylene vinyl acetate
  • PP polypropylene
  • TPU thermoplastic polyurethane
  • PVA polyvinyl acetate
  • the film may in this case have a basis weight in the range of 10-500 g / m 2 , preferably 20-60 g / m 2 .
  • films made of several components such as PET-PU films, PA-PU films, PET-PA films.
  • Such films may have a basis weight in the range of 20-500 g / m 2 , preferably 20-60 g / m 2 .
  • the spunbonded fabric can be formed, for example, from one or more of the following polymers:
  • the basis weight of the nonwoven web can in this case in the range of approximately 10 g / m 2 - 150g / m 2 are. Since, at least in the case of a press felt, the basic structure is needled during production with one or more nonwoven fabric layers, it is not necessary, in view of the permeability of the finished fabric, for the films to be permeable. A preferred embodiment therefore provides that the film (s) originally, ie in the connection with the warp knit, is or are impermeable and only made permeable by a needling process.
  • connection strip and / or the material strip is connected in particular due to the effect of pressure and / or temperature with the warp knit.
  • the or the connection strip and / or the strip of material melt at a lower temperature than the sewing and weft threads of the warp knitted fabric.
  • connection strip (s) and / or material strips are connected to one another, for example, by hot-wire welding and / or ultrasonic welding and / or laser welding.
  • the longitudinal reinforcement module comprises, in addition to the already described L Lucassfadengelege arranged on the Leksfadengelege and connected thereto carrier layer.
  • the carrier layer extends in this case, in particular like the longitudinal thread layer, over the entire width and length of the papermachine fabric.
  • the carrier layer may be formed alone or in combination by: a nonwoven fabric layer, a film layer.
  • the longitudinal thread layer is preferably embedded in the nonwoven layer. This can for example be achieved by the Lssensfadengelege with as
  • Nonwoven layer trained carrier layer is needled. By the needling process, it is possible that the carrier layer is largely destroyed.
  • the carrier layer can in this case mainly take on the task of keeping the longitudinal threads of the longitudinal thread fabric during the further manufacturing process of the felt in position.
  • the transverse reinforcement module is arranged on the support layer of the longitudinal reinforcement module and connected thereto.
  • the carrier layer for example, be designed accordingly to be easily connected to the transverse reinforcement module can.
  • the nonwoven layer comprises hot melt adhesive fibers, so that the transverse reinforcement module can be bonded to the carrier layer of the longitudinal reinforcement module by the action of heat. Simultaneously with the action of heat, the connection between the transverse reinforcement module and the longitudinal reinforcement module can be further improved by the assistance of pressure.
  • the longitudinal reinforcement module and the transverse reinforcement module to be jointly guided around a heated roller or through a heated press nip for the purpose of heat action.
  • connection techniques are possible. It is conceivable, for example, that the transverse reinforcement module is connected to the longitudinal reinforcement module by needling them together and / or sewn and / or welded. It is conceivable in this context, for example, that the transverse reinforcement module is made endless and is subsequently connected to an endlessly made or endlessly produced longitudinal reinforcement module and to one or more nonwoven fabric layers in the needle machine by needling.
  • the connection can be made only by needling or in combination with another connection technique.
  • the production of the carrier layer to use a prefabricated carrier web with a smaller width than the width of the fabric.
  • the carrier web it is conceivable, for example, for the carrier web to be formed from at least one carrier web extending substantially helically in the longitudinal direction of the clothing and wound helically in the transverse direction of the clothing.
  • the carrier layer is thus produced in this case by an only on a part of the intended width of the paper machine clothing extending carrier web in the direction of the intended width of the paper machine clothing is wound helically progressing to the intended width of the fabric.
  • the mutually facing edges of the carrier web can be placed in abutting or overlapping regions.
  • the covering may comprise a basic structure which is formed, for example, from a) a longitudinal reinforcement module which extends over the width and the length of the covering and which comprises
  • a longitudinal thread covering on the width and the length of the fabric which is formed from at least one longitudinal thread extending substantially in the longitudinal direction of the fabric, and / or a support layer connected to the longitudinal thread covering and extending over the width and the length of the fabric
  • transverse reinforcement module ii) a woven or spiraled or knitted fabric, and b) a transverse reinforcement module of the same length and width as the fabric, the transverse reinforcement module and the longitudinal reinforcement module being arranged and connected to each other, and the transverse reinforcement module
  • warp knit which extends over the length of the fabric and on the width of the fabric and is formed from at least one system of weft threads extending parallel to each other in their length and at least one substantially perpendicular to the
  • the fabric formed as a fabric may be either flat or round woven.
  • a method for producing the fabric according to the invention, in particular a press felt for a paper machine, which has a length and a width may comprise the following steps: a) providing a longitudinal reinforcement module having a width and a length corresponding to the width and length of the fabric to be produced , b) providing a transverse reinforcement module having a width and a length corresponding to the width and length of the fabric to be produced, c) arranging the longitudinal reinforcement module and the transverse reinforcement module on one another and d) connecting the transverse reinforcement module to the longitudinal reinforcement module.
  • step b) comprises at least the steps; i) providing at least one warp knit formed of at least one system of weft yarns extending parallel to each other and at least one system of sewing yarns extending substantially perpendicular to the longitudinal extent of the weft yarns, forming stitches in which the weft yarns are incorporated to form a fabric; the weft threads have a greater flexural rigidity than the sewing threads and wherein the warp knit has a length which corresponds to the length of the fabric to be produced and in that step c) comprises at least the step; ii) stacking of warp knit fabric and longitudinal reinforcement module such that the weft threads of the warp knit extend obliquely or transversely to the longitudinal direction of the fabric. If the warp knit originally is longer than the length of the fabric to be produced, then this can be shortened in a further step iii) by cutting the sewing threads of the warp knit fabric to the length of the fabric to be produced.
  • steps i) -iii) are not specified here. Thus, for example, it is conceivable that first step i) then step ii) and then step iii) is carried out. However, it is also conceivable that step i) is carried out first, then step iii) and, as the last step, step ii).
  • the at least one warp knit fabric providing the transverse reinforcement module is first cut to the length of the fabric before the transverse reinforcement module and the longitudinal reinforcement module are arranged on top of each other. Furthermore, it is therefore also conceivable that the warp knit after this on the entire length of the fabric on or under the
  • Longitudinal reinforcement module is arranged, is cut to the length of the fabric. This can happen, for example, if the warp knit is in the form of a roll and unwound from it during its placement on the longitudinal reinforcement module.
  • transverse reinforcement module cut to the length of the fabric is first made endless, before it is arranged on the, for example, endlessly made or endlessly produced longitudinal reinforcement module and subsequently connected thereto.
  • the warp knit fabric and the longitudinal reinforcement module are preferably arranged on top of one another in such a way that the sewing threads extend in the longitudinal direction and the weft threads extending perpendicularly to the latter extend in the transverse direction of the fabric.
  • the warp knit fabric can be laminated on each cut edge by means of the material strip already described in order to prevent fraying of the respective transverse edge.
  • the transverse reinforcement module must be made endless. This can, for example, be done by placing the two transverse edges of the transverse thread module in abutment against one another and connecting them to one another by means of the connection strips already described.
  • FIG. 1 shows an embodiment of a transverse reinforcement module according to the invention for a basic structure of a press felt in plan view
  • Figure 2 shows an embodiment of a press felt according to the invention with the transverse reinforcement module of Figure 1 in cross section;
  • FIG. 3 shows an embodiment of a method according to the invention for producing a papermachine fabric according to the invention
  • FIG. 4 shows an alternative embodiment of a method according to the invention for producing a papermachine fabric according to the invention.
  • FIG. 1 shows an embodiment of a transverse reinforcement module 1 according to the invention for a basic structure of a press felt in plan view.
  • FIG. 1 shows the transverse reinforcement module in sections.
  • the transverse reinforcement module 1 is formed from at least one warp knit.
  • the warp knitted fabric shown in FIG. 1 is formed from a system of weft threads 2 arranged parallel to one another and to a stitching thread 3 forming meshes substantially perpendicular thereto. To form a textile fabric, the weft threads 3 are incorporated in stitches 4 of the sewing threads 3.
  • weft threads 2 extend in the transverse direction CMD of the clothing and have a greater flexural rigidity than the sewing threads 3.
  • the sewing threads 3 extend in the longitudinal direction MD of the clothing.
  • the longitudinal direction L of the warp knitted fabric is determined by the longitudinal extent of the sewing threads 3, as the transverse direction Q of the warp knitted fabric is determined by the longitudinal extent of the weft threads 2. Consequently, the warp knit is oriented so as to extend in its longitudinal direction L in the longitudinal direction MD of the fabric.
  • the weft threads 2 are formed by multifilament yarns, for example by four monofilaments of polyamide (PA) twisted together.
  • the twisted weft yarns 2 have a fineness in the range of about 150tex, whereas the sewing yarns have a fineness in the range of about 6.7-14tex.
  • the transverse reinforcement module 1 shown in FIG. 1 was produced by a stitch-bonding method in which the weft threads 2 were fed during stitch formation by means of parallel weft insertion.
  • the sewing threads 3 form rows 5 of stitches 4 arranged parallel to one another and extending perpendicularly to the weft threads 2, the weft threads 2 being bound into the stitches 4.
  • each of the sewing thread 3 of the system forms its own stitch row 5.
  • each weft thread 2 is incorporated into a stitch 4 of each stitch row 5.
  • the spacing of the weft threads 2 relative to one another is determined by the length of the stitches 4 in the courses 5.
  • the transverse reinforcement module 1 shown in FIG. 1 was made flat.
  • FIG. 2 shows an embodiment of a papermachine fabric 10 according to the invention in the form of a press felt in cross-section with the transverse reinforcement module 1 of FIG. 1.
  • the fabric 10 has a load-bearing base structure 11 which extends in the longitudinal direction and in the transverse direction CMD of the fabric 10.
  • the basic structure 11 is formed from a longitudinal reinforcement module 12 substantially providing the dimensional stability in the longitudinal direction MD of the clothing 10, and from the transverse reinforcement module 1 substantially providing the dimensional stability in the transverse direction CMD of the clothing 10, the transverse reinforcement module 1 being shown in FIG Longitudinal reinforcing module is arranged and connected thereto.
  • the longitudinal reinforcing module 12 shown in FIG. 2 comprises a longitudinal thread loop 13, which is formed from a plurality of longitudinal threads 14 that extend substantially helically in the longitudinal direction of the covering 10 and are wound helically in the transverse direction CMD of the covering 10. Furthermore, the longitudinal reinforcement module 12 comprises a carrier layer 15 designed as a nonwoven fabric layer, in which the longitudinal thread layer 13 is embedded.
  • the nonwoven fabric layer 15 may comprise melt adhesive fibers.
  • the transverse reinforcement module 1 is connected to the longitudinal reinforcement module 11 by bonding to the melt fibers, i. the transverse reinforcement module 1 is arranged on the support layer 15 and connected thereto.
  • the fabric 10 formed as press felt two nonwoven fabric layers 17, 18 are arranged on the side of the basic structure 11 facing the paper side 16 and connected to the basic structure 11 by needling.
  • the upper nonwoven fabric layer 17 providing the paper side 16 comprises finer fibers than the middle nonwoven fabric layer 18 arranged between the upper nonwoven fabric layer 17 and the basic structure 11.
  • a nonwoven fabric layer 19 is arranged, which is connected to the base structure 11 by needling and which provides the machine side 20 of the fabric 10.
  • FIG. 3 shows an embodiment of a method according to the invention for producing a papermachine fabric according to the invention.
  • an endlessly formed longitudinal reinforcement module 12 is provided by at least one longitudinal thread 14 extending substantially in the longitudinal direction MD of the fabric between two spaced apart ones and parallel aligned rollers 21, 22 in the transverse direction CMD the fabric wound helically progressively.
  • the length of the longitudinal reinforcement module 12 is determined by the distance of the rollers 21, 22 to each other.
  • the helical progressive winding of the at least a longitudinal thread 14 in the transverse direction CMD takes place up to the desired width of the longitudinal thread fabric.
  • the longitudinal reinforcement module 12 may comprise a support layer formed as a nonwoven fabric layer 15, in which the scrim is embedded, for example. As a result, a longitudinal reinforcement module 12 is produced which has a width and a length corresponding to the width and length of the fabric to be produced.
  • the transverse reinforcement module 1 known from FIG. 1 is provided by arranging a warp knit forming the transverse reinforcement module 1 on the longitudinal reinforcement module 12 such that the weft threads of the warp knit are in the transverse direction CMD and the sewing threads in the longitudinal direction MD extend the fabric to be produced.
  • the warp knitted fabric is cut in MD and CMD such that the width and the length of the warp knitted fabric corresponds to the width and length of the fabric to be produced.
  • the sewing threads of the warp knitted fabric are cut to length such that the length of the warp knit fabric corresponds to the length of the fabric to be produced.
  • a material strip 23, 24 is applied to the warp knit in the two areas, with which the cut edges produced subsequently during cutting correspond to the transverse edges, by which the length of the knitted fabric is limited - be laminated against fraying.
  • the transverse reinforcement module 1 is made endless by abutting the two cutting edges or transverse edges produced when the fabric is cut to length in its longitudinal direction and joined together by a connecting strip 25 which covers the two transverse edges placed on the joint and is connected to the transverse reinforcement module 1 in the region of the two transverse edges.
  • the basic structure is finished and can be connected in the step shown in Figure 3d on both sides with one or more nonwoven fabric layers 17, 18, for example by means of a needling device 27 by needling.
  • a needling device 27 by needling.
  • FIGS. 4a-4c An alternative possibility for producing a press felt according to the invention is shown in FIGS. 4a-4c.
  • a longitudinal reinforcement module 33 is produced as an endless belt. This may be a longitudinal thread layer as illustrated in FIG. 3a or, as shown in FIG. 4a, a textile fabric designed as a fabric which is suitable for substantially providing the longitudinal stability of the fabric. When endless, the fabric 33 can be stretched for this purpose between two mutually parallel spaced rollers 29, 30.
  • an inventive transverse reinforcement module 1 is provided.
  • a warp knitted fabric is cut to the intended circumferential length of the press felt and, for example, by means of a Foil or spunbond formed connecting strip 25 or made endless by hot wire welding.
  • the warp knit fabric providing the transverse reinforcement module 1 can be tensioned around two rolls 31, 32 which are parallel to one another.
  • the endless longitudinal reinforcement module 33, the endless transverse reinforcement module 1, as well as fiber fleece layers 37, 38 arranged above and / or below them are connected to one another by needling.
  • the endless longitudinal reinforcement module 33 and the endless transverse reinforcement module 1 are placed on each other by being pulled over two rollers 34, 35 spaced parallel to one another.
  • the longitudinal reinforcement module 33 and the transverse reinforcement module 1 deposited thereon, together with the nonwoven fabric layers 37, 38, are fed to a needling device 36, which needles the entire arrangement of longitudinal reinforcement module 33, transverse reinforcement module 1 and nonwoven fabric layers 37, 38.

Landscapes

  • Paper (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

La présente invention concerne une toile de machine à papier, en particulier un feutre de presse destiné à une machine à papier, à carton ou à papier-mouchoir, comprenant une structure de base de support de charge qui s'étend en direction longitudinale et en direction transversale de la toile et comprend, en particulier est constituée de : a) un module de renfort longitudinal qui assure sensiblement la stabilité dimensionnelle dans la direction longitudinale de la toile; et b) un module de renfort transversal qui assure sensiblement la stabilité dimensionnelle dans la direction transversale de la toile, le module de renfort transversal et le module de renfort longitudinal étant superposés et reliés entre eux. L'invention se caractérise en ce que le module de renfort transversal est un tissu tricoté chaîne qui se compose d'au moins un système de fils de trame parallèles entre eux et, sensiblement perpendiculaire à celui-ci, d'au moins un système d'aiguillées de fil formant des mailles, auquel sont intégrés les fils de trame pour former une structure textile plane, les fils de trame s'étendant transversalement à la direction longitudinale de la toile et ayant une raideur supérieure à celle des aiguillées de fil.
PCT/EP2009/064833 2008-11-19 2009-11-09 Toile de machine à papier et son procédé de réalisation WO2010057802A2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BRPI0916035A BRPI0916035A2 (pt) 2008-11-19 2009-11-09 revestimento de máquina de papel e processo para sua fabricação
EP09748122.0A EP2358939B1 (fr) 2008-11-19 2009-11-09 Toile de machine à papier et son procédé de réalisation
CN2009801460885A CN102325939A (zh) 2008-11-19 2009-11-09 造纸机网毯及其制造方法
US13/111,291 US20110294386A1 (en) 2008-11-19 2011-05-19 Paper machine clothing and method for the production thereof

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE200810043855 DE102008043855A1 (de) 2008-11-19 2008-11-19 Papiermaschinenbespannung und Verfahren zu deren Herstellung
DE102008043855.3 2008-11-19
DE200910002175 DE102009002175A1 (de) 2009-04-03 2009-04-03 Papiermaschinenbespannung und Verfahren zu deren Herstellung
DE102009002175.2 2009-04-03

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/111,291 Continuation US20110294386A1 (en) 2008-11-19 2011-05-19 Paper machine clothing and method for the production thereof

Publications (2)

Publication Number Publication Date
WO2010057802A2 true WO2010057802A2 (fr) 2010-05-27
WO2010057802A3 WO2010057802A3 (fr) 2012-08-16

Family

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PCT/EP2009/064833 WO2010057802A2 (fr) 2008-11-19 2009-11-09 Toile de machine à papier et son procédé de réalisation

Country Status (5)

Country Link
US (1) US20110294386A1 (fr)
EP (1) EP2358939B1 (fr)
CN (1) CN102325939A (fr)
BR (1) BRPI0916035A2 (fr)
WO (1) WO2010057802A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8273218B2 (en) 2008-11-20 2012-09-25 Voith Patent Gmbh Press felt and method for the production thereof
WO2012140036A1 (fr) * 2011-04-13 2012-10-18 Voith Patent Gmbh Procédé de production d'un module sans fin, pour l'habillage d'une machine à papier, et module sans fin associé
WO2012140046A1 (fr) * 2011-04-13 2012-10-18 Voith Patent Gmbh Procédé de production d'un module, en particulier d'un module sans fin, pour l'habillage d'une machine à papier, et module sans fin associé
CN103384741A (zh) * 2011-02-23 2013-11-06 沃依特专利有限责任公司 用于制造纤维幅的机器的压榨部和用于制造纤维幅的方法

Families Citing this family (2)

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Publication number Priority date Publication date Assignee Title
US9045846B2 (en) * 2012-12-05 2015-06-02 Goodrich Corporation Spiral textile and system for weaving the same
EP2954105B1 (fr) * 2013-02-06 2024-03-20 AstenJohnson, Inc. Tissu à base de feutre de presse présentant une réduction d'interférence

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EP2107159A1 (fr) * 2008-04-01 2009-10-07 Voith Patent GmbH Feutre de presse et son procédé de fabrication

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DE1660765A1 (de) 1967-09-15 1971-08-05 Richard Dilo Verfahren zum Herstellen endloser Papiermaschinenfilze oder technischer Schlauchfilze und Vorrichtung zum Durchfuehren des Verfahrens
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WO1989003300A1 (fr) * 1987-10-07 1989-04-20 The Draper Felt Company, Inc. Feutre pour presse de fabrication de papier
EP2107159A1 (fr) * 2008-04-01 2009-10-07 Voith Patent GmbH Feutre de presse et son procédé de fabrication

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8273218B2 (en) 2008-11-20 2012-09-25 Voith Patent Gmbh Press felt and method for the production thereof
CN103384741A (zh) * 2011-02-23 2013-11-06 沃依特专利有限责任公司 用于制造纤维幅的机器的压榨部和用于制造纤维幅的方法
WO2012140036A1 (fr) * 2011-04-13 2012-10-18 Voith Patent Gmbh Procédé de production d'un module sans fin, pour l'habillage d'une machine à papier, et module sans fin associé
WO2012140046A1 (fr) * 2011-04-13 2012-10-18 Voith Patent Gmbh Procédé de production d'un module, en particulier d'un module sans fin, pour l'habillage d'une machine à papier, et module sans fin associé

Also Published As

Publication number Publication date
EP2358939A2 (fr) 2011-08-24
BRPI0916035A2 (pt) 2015-11-17
EP2358939B1 (fr) 2015-04-29
WO2010057802A3 (fr) 2012-08-16
CN102325939A (zh) 2012-01-18
US20110294386A1 (en) 2011-12-01

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