EP2358940A1 - Pressfilz und verfahren zu seiner herstellung - Google Patents
Pressfilz und verfahren zu seiner herstellungInfo
- Publication number
- EP2358940A1 EP2358940A1 EP09771728A EP09771728A EP2358940A1 EP 2358940 A1 EP2358940 A1 EP 2358940A1 EP 09771728 A EP09771728 A EP 09771728A EP 09771728 A EP09771728 A EP 09771728A EP 2358940 A1 EP2358940 A1 EP 2358940A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fabric
- longitudinal
- threads
- reinforcement module
- transverse
- 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.)
- Granted
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
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 30.
- 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.
- EP 1837440A1 further proposes that the longitudinal reinforcement module receiving the tensile load be produced from a longitudinal thread layer connected to a fiber layer in a winding process and the transverse reinforcement module to be used for increasing the transverse stability consisting of a plurality of only a portion of the length to build the press felt extending transverse reinforcement module sections, which are also produced in a first manufacturing step via a winding process as the longitudinal reinforcement module and cut in a subsequent manufacturing step to width of the produced press felt and with the Threads transverse to the L Lucassfadengelege oriented in the longitudinal direction of the felt are arranged one behind the other lying.
- 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 press felt concepts here consist of longitudinal yarn layers and transverse yarn fabrics, the two fabrics being connected to one another only via a nonwoven fabric layer.
- 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.
- 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 fabric and which is formed from a dimensional stability of the fabric in the longitudinal direction substantially providing longitudinal reinforcement module and from a dimensional stability of the fabric in the transverse direction at least partially, in particular essentially, providing transverse reinforcement module, which is arranged on the longitudinal reinforcement module and connected thereto.
- the transverse reinforcement module comprises at least one material section constructed of a warp knit fabric, the warp knit being formed from at least one system of warp threads extending in parallel with each other and sewing stitches forming stitches, the stitch forming sewing threads forming at least one system comprising first sewing threads extending obliquely or transversely to the warp threads, which join the warp threads together to form a textile fabric, and wherein the warp threads extend in their length obliquely or transversely to the longitudinal direction of the fabric and have a greater flexural rigidity than the first sewing threads.
- First sewing threads in the sense of the invention are those which connect different warp threads together, i. Such sewing threads that are meshed structure forming with the warp threads. For the purposes of the invention, several systems of first sewing threads may also be present. A system is characterized in that all its threads are meshed in the same way.
- the longitudinal reinforcement module and the transverse reinforcement module are produced here independently of one another.
- the dimensional reinforcement of the fabric in the longitudinal direction of the fabric is further provided by the longitudinal reinforcement module, whereas the dimensional reinforcement of the fabric in the transverse or width direction of the fabric is provided at least partially, in particular substantially, 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”, it is to be understood that more than 50% of the longitudinal stability of the fabric is provided by the longitudinal reinforcement module can contribute to the provision of dimensional stability of the fabric in the transverse or width direction of the fabric.
- that the dimensional stability of the clothing in the transverse direction of the clothing is at least partially provided by the transverse reinforcement module is to be understood that at least a part of the transverse stability of the clothing is provided by the transverse reinforcement module.
- transverse reinforcement module that the dimensional stability of the fabric in the transverse direction of the fabric is provided essentially 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 that at least partially, in particular substantially, provides the lateral stiffness of the clothing.
- the transverse reinforcement module comprises at least one material section, which is formed from a warp knit fabric, which is constructed from at least one warp thread system and stitching thread forming stitches.
- the material section is arranged on the longitudinal reinforcement module such that the warp threads of the warp knit extend obliquely or transversely to the longitudinal direction of the fabric.
- the transverse stiffness of the fabric is thereby at least partially, in particular substantially, provided by the warp threads, whereas the stitch threads forming the stitches essentially serve to hold the warp threads in position during the production of the fabric.
- the warp knit fabric can be produced inexpensively as a flat and one-piece fabric with in the direction of the warp threads of any longitudinal extent by knitting process and subsequently, for example, be cut to the width of the papermachine fabric to be produced.
- the warp knit according to the invention can thus be made in any length in its longitudinal direction, this is determined by the direction of the warp threads.
- the warp knit invention can be produced along its warp threads in almost any length and the dimensionally stable warp threads extend obliquely or transversely to the longitudinal direction of the fabric, the invention provides a textile transverse reinforcement structure that can be used for arbitrarily broad paper machine clothing.
- transverse reinforcement module is constructed from one or more material sections (s) formed from a warp knit fabric.
- the longitudinal reinforcement module is produced as an endless belt. This may be the case, for example, when the longitudinal reinforcement module is made as a spiraled scrim or endlessly woven fabric. Furthermore, it is conceivable that the longitudinal reinforcement module is made seamable.
- the longitudinal reinforcement module comprises or is formed by a longitudinal thread loop.
- 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. Preferably, in this case, the at least one longitudinal thread is wound over the entire width of the basic structure.
- 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 in the direction of the intended width of the felt belt progressively schiförmig up to the intended width of the felt.
- a Leksfadengelege 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) corresponds to that of the longitudinal thread layer and the Include longitudinally of the felt with each other an angle of not more than 10 °, in particular at most 5 °.
- the longitudinal reinforcement module comprises or is formed from a scrim
- 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 essentially provided by the transverse reinforcement module.
- 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 clothing in the transverse or width direction of the clothing 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.
- the longitudinal reinforcement module embodied as a woven fabric can in this case be produced either round or flat woven.
- a development of the invention further provides that the stitch-forming sewing threads comprise at least one system of second sewing threads, which form in the longitudinal direction of the warp threads and the warp threads at least partially enclosing courses.
- each warp thread is preferably at least partially enveloped by at least one row of stitches of second sewing threads, whereby the respective wrapped warp thread is incorporated into the stitches.
- the second sewing threads enveloping the warp threads are preferably incorporated in stitches of the first sewing threads connecting the various warp threads to one another.
- the second, warp threads have a greater flexural rigidity than the second sewing threads.
- Second sewing threads in the sense of the invention are those which wrap warp threads, i. Sewing threads in the stitches of the warp threads are integrated so that they are at least partially enveloped by these.
- several systems of second sewing threads may also be present.
- a system is characterized in that all its threads are meshed in the same way.
- each warp thread is wrapped by several courses of second sewing threads.
- the courses of second sewing threads complement one another during the wrapping of a respective warp thread.
- at least two systems of second sewing threads are provided, namely a first system of second sewing threads and a second system of second sewing threads which jointly envelop the warp threads.
- each of the first sewing threads extends in a zig-zag line between warp threads, the zig-zag line advancing in the direction of the longitudinal extent of the warp threads.
- An embodiment of the invention provides that every second sewing thread is incorporated into stitches of a plurality of first sewing threads. Furthermore, it is conceivable that when a second sewing thread is incorporated into a stitch of a first sewing thread, the first and second sewing threads form a common stitch. Further, it is possible that the first and second sewing threads are thinner than the warp threads.
- a further embodiment of the invention provides that the transverse reinforcement module is constructed from only one system of warp threads arranged parallel to one another.
- the stitch-forming sewing threads are further formed from only one system of first sewing threads and two systems of second sewing threads. This further simplifies the construction of the transverse reinforcement module.
- the individual first sewing threads are not intermeshed, but only by second sewing threads, i. through the wrapping structure of the warp threads, connected together.
- the rows of stitches of the second sewing threads preferably extend in the transverse direction of the clothing.
- every second sewing thread forms its own row of stitches.
- a concrete embodiment provides here that the warp threads are enveloped by a opposite tricot binding of a first and a second system of second sewing thread.
- each of the first connecting the warp threads d. H. structure-forming sewing threads forms a cord or velvet weave.
- a warp knit in which each warp thread is enveloped together by a second sewing thread of the first system and a second sewing thread of the second system and different warp threads are connected to each other by first sewing threads, wherein warp threads in stitches of second sewing threads of the first and the second system are involved, which in turn are integrated into the stitches of the first sewing threads.
- first sewing threads wherein warp threads in stitches of second sewing threads of the first and the second system are involved, which in turn are integrated into the stitches of the first sewing threads.
- the warp threads are formed by multifilament yarns, in particular by mutually twisted monofilaments.
- the longitudinal threads are formed as monofilaments.
- 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 monofilaments are made of polyamide (PA).
- the twisted warp threads may have a fineness in the range of about 50-500 tex, especially about 100-400tex.
- a fineness is conceivable which, for example, is in the range of approximately 8-200 tex, in particular approximately 21 -120 tex.
- warp threads are formed by monofilament threads.
- the transverse reinforcement module can furthermore comprise at least one material section constructed from the warp knit, which extends over the width of the fabric.
- the transverse reinforcement module is preferably constructed from a plurality of material sections extending in each case over the width of the clothing and only over a portion of the length of the clothing, which are arranged one behind the other in the longitudinal direction of the clothing, and which are complementary to the length of the clothing. It is conceivable that each of the width of the clothing
- Stretching extending material sections in the range of 0.5 to 8 meters in the longitudinal direction of the fabric extends.
- the constructed by the warp knitted fabric portion may be limited in length by two transverse edges. Since the warp knit in the transverse reinforcement module according to the invention in its longitudinal direction, i. in the direction of its warp threads, is arranged transversely to the longitudinal direction of the papermachine fabric, the transverse edges of the material section extending in the longitudinal direction of the warp knit, wherein the warp knit extends with its transverse direction in the longitudinal direction of the fabric and its width determines the length of the material portion in the longitudinal direction of the fabric ,
- the transverse edges of mutually adjacent material sections are preferably abutted against each other.
- 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.
- the foil can in this case have a basis weight in the range of 10- 500 g / m 2, preferably 20-60g / 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 20-500g / m 2, preferably of 20- 60g / 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.
- the connecting strip and / or the material strip are connected to the warp knitted fabric, in particular due to the effect of pressure and / or temperature.
- two material sections are, for example, interconnected by hot-wire welding and / or ultrasonic welding and / or laser welding.
- the two material sections In hot-wire welding, for example, it is conceivable for the two material sections to be connected to one another to be superimposed and to be connected to each other by means of a heated wire along a welding edge. After the formation of the welding edge, the pieces of material deposited on one another and connected to one another at the welding edge are arranged side by side, folded away from one another.
- transverse and / or longitudinal edges are connected to each other with or without strips of material by hot wire welding described above.
- the welding edge can be smoothed, for example, with ultrasound.
- 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 L Lucassfadengelege 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 carrier layer formed as a nonwoven fabric 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 for the action of heat.
- 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 subsequently made with an endless made or endless
- the endlessly made longitudinal reinforcement module can in this case already be made endless or have an openable and closable seam, for example a seam with a pintle wire.
- the preparation of the carrier layer to use a prefabricated carrier web with a width smaller 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
- the warp knit fabric is formed from at least one system of warp threads extending in parallel with each other and sewing stitches forming stitches, the stitch forming sewing threads comprising at least one system of first sewing threads extending obliquely or transversely of the warp threads, which comprise the warp threads connect to form a textile fabric together and wherein the warp threads extend in their length transverse to the longitudinal direction of the fabric and have a greater bending stiffness than the first sewing threads.
- At least one, in particular a plurality of nonwoven fabric layer (s) is / are arranged on the side of the basic structure of the fabric facing the paper side and / or on the machine side.
- the papermachine clothing according to the invention is a press felt which is seamable in the machine, in particular paper, board or tissue machine.
- a press felt has at its two open ends usually formed in particular by Monofilamentfäden seam loops, which are engageable with each other for endlessly making the press felt, that through the engagement region a tunnel is formed through which a pintle can be passed.
- a method for producing the fabric according to the invention 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 material section constructed of a warp knit fabric, the warp knit being formed from at least one system of warp threads and stitching threads extending parallel to one another in length, the stitching threads forming at least one system of first oblique or transverse to the Including warp threads extending sewing threads which connect the warp threads to form a fabric together and wherein the warp threads in their length have a greater flexural rigidity than the first sewing threads and wherein the warp knit has a length which corresponds at least to the width of the fabric to be produced and ii) optionally Cutting the warp threads so that the length of the material section formed from the warp knit corresponds to the width of the fabric to be produced, and that step c) comprises at least the step; iii) arranging the material section formed from the warp knit fabric on the longitudinal reinforcement module such that the warp threads of the warp knit extend ob
- steps i) -iii) are not specified here. Thus, for example, it is conceivable that first step i) then step iii) and then step ii) is carried out. However, it is also conceivable that step i) is carried out first, then step ii) and, as the last step, step iii).
- the transverse reinforcement module extending over the length and width of the fabric, it is possible to provide a plurality of material cuts constructed from the warp knitted fabric, each having a width which is smaller than the length of the fabric to be produced, and repeating the steps i). - iii) such that the individual material sections each extend to the width of the fabric and only a portion of the length of the fabric and in the longitudinal direction of the fabric lying behind each other, are arranged complementary to each other to the length of the fabric.
- the warp knit fabric After cutting to length, 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 Before the subsequent needling, in which one or more non-woven fabric layers are needled on the side of the basic structure facing the paper side and / or on the machine side, the transverse reinforcement module can be made endless. This can, for example, be done by each mutually adjacent material sections are connected to each other.
- the longitudinal reinforcement module and / or the transverse reinforcement module can already be configured as endless belts produced separately.
- the longitudinal reinforcement module is present as an endless longitudinal thread layer and the transverse reinforcement module likewise exists endlessly, before these are arranged on one another and, for example, connected to one another by needling. It is also conceivable, however, for the longitudinal reinforcement module to be in the form of endlessly woven or seamable fabric and for the transverse reinforcement module is also endless, before they are arranged on top of each other and, for example, connected by needling together. In needling, in this case, one or more nonwoven fabric layers are in particular needled simultaneously with the longitudinal and transverse reinforcement module.
- the endless longitudinal reinforcement module can be produced endlessly or have an openable and closable seam.
- the method according to the invention it is easily possible to produce the transverse reinforcement module from a material web delivered as a roll product.
- the inventive method according to this aspect is particularly advantageous when the warp knitted fabric according to the invention is used, which is formed from at least one system of warp threads extending in parallel with each other and sewing stitches forming stitches, forming the stitches Sewing threads at least comprise a system of first running obliquely or transversely to the warp threads sewing threads which connect the warp threads to form a textile fabric together and wherein the warp threads extend in length obliquely or transversely to the longitudinal direction of the fabric and have a greater flexural rigidity than the first Sewing threads, since such a warp knit fabric can be purchased as a roll of mass-produced goods.
- each of the material sections deposited on the longitudinal reinforcement module extends along the width of the longitudinal reinforcement module and the material sections lying one behind the other complement one another to form the length of the longitudinal reinforcement module.
- the material sections deposited on the longitudinal reinforcement module are connected to the longitudinal reinforcement module.
- connection of the individual material sections formed from the warp knit fabric to the longitudinal reinforcement module can, for example, comprise the fact that the longitudinal reinforcement module and the material sections arranged thereon are subjected together to a heat effect.
- the longitudinal reinforcement module and the material sections arranged thereon can be jointly guided around a heated roller for the action of heat.
- 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
- FIG. 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 a further embodiment of a method according to the invention for producing a papermachine fabric according to the invention
- FIG. 5 shows a possible embodiment for connecting two mutually adjacent material sections
- FIG. 6 shows a further embodiment of a method according to the invention for producing a papermachine fabric according to the invention.
- FIG. 1 shows a section of an embodiment of a transverse reinforcement module 1 according to the invention for a basic structure of a press felt in plan view.
- the transverse reinforcement module 1 is formed by at least one material section of a flat warp knitted fabric 2. In the illustration of Figure 1, a warp knit 2 is partially visible.
- the warp knitted fabric is formed from a system of warp threads 3 and sewing threads 4, 5 extending parallel to one another in their length, which form stitches 6, 7.
- the stitch-forming sewing threads 4, 5 form a system of first sewing threads 4 running obliquely or transversely to the warp threads 3 and a system of second sewing threads 5.
- first sewing threads 4 connects the warp threads 3 with each other to form a textile fabric.
- the second sewing threads 5 extend in the longitudinal direction of the warp threads 3 and in this case wrap warp threads 3, wherein first sewing threads 4 are incorporated in stitches 7 of the second sewing threads 5.
- first and second sewing threads 4, 5 form common stitches.
- each second sewing thread 5 encloses in each case one warp thread 3, wherein each first sewing thread 4 is incorporated into stitches 6 of a plurality of second sewing threads 5.
- Each warp thread 3 is hereby incorporated into a course 8 of the second sewing thread 5.
- the second sewing threads 5 form mutually parallel and extending along the warp threads 3 rows 8 of stitches 7, wherein the warp threads 3 are incorporated in stitches 7 of the second sewing threads 5. It can be seen that each second sewing thread 5 forms its own row of stitches 8, wherein each of the rows of stitches 8 is formed by a fringe weave which extends mutually offset along the respective warp thread 3.
- the warp knit shown in FIG. 1 has the following structure:
- the warp threads 3 extend in their length in the transverse direction CMD of the clothing and have a greater flexural rigidity than the first and the second sewing threads 4, 5.
- the longitudinal direction L of the warp knit 2 is determined by the longitudinal extent of the warp threads 3.
- the first sewing threads 4 extend in zig-zag lines between warp threads 3, wherein the zig-zag lines in the longitudinal direction L of Warp knit 2 progress.
- the warp knit 2 is oriented so as to extend in its longitudinal direction L in the transverse direction CMD of the fabric.
- the warp threads 3 can be formed by multifilament yarns, in particular by mutually twisted monofilaments.
- 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 fabric 10, and from the transverse reinforcement module 1 substantially providing the dimensional stability in the transverse direction CMD of the fabric 10, wherein the transverse reinforcement module 1 is arranged on the longitudinal reinforcement module and connected thereto.
- the longitudinal reinforcement 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.
- 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 with the longitudinal reinforcement module 11 by gluing with connected to the melt fibers, ie the transverse reinforcement module 1 is disposed on the support layer 15 and connected thereto.
- the fabric 10 formed as press felt furthermore, 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 steps of a production method according to the invention.
- material portion 21 a is already stored on the longitudinal reinforcement module 12 and another formed from the warp knit fabric portion 21 b, which is just placed on the longitudinal reinforcement module 12.
- the two material sections 21a, 21b have already been cut to the correct length, ie to the width of the longitudinal reinforcement module 12 or the covering 10, before they are deposited on the longitudinal reinforcement module 12.
- All material sections are arranged on the longitudinal reinforcement module 12 so that the warp knitted fabric in its longitudinal direction L, ie in the direction of the warp threads in Transverse direction of the fabric to be produced 10 and in its transverse direction Q in the longitudinal direction of the produced Covering 10 extends.
- the material sections each extend over the width of the clothing but only over part of the length of the fabric to be produced.
- the material sections 21 a, 21 b, ... are arranged on the longitudinal reinforcement module 12 such that they extend in each case over the width of the covering 10 and only over part of the length of the covering 10, in the range between 0.5 m and 8 m and that these are arranged one behind the other in the longitudinal direction MD of the fabric 10.
- all the material sections 21 a, 21 b,... Deposited on the longitudinal reinforcement module 12 have the same design and may, for example, have been successively cut from a material web.
- each transverse edge 23, 24 is further in the region of each transverse edge 23, 24 each have a material strip 26 with the respective material portion 21 a, 21 b connected, one edge of which is flush with the respective transverse edge 23, 24.
- warp threads 3 of the fabric sections 21 a, 21 b formed by the warp knit fabric are arranged at right angles to the longitudinal direction MD of the fabric 10.
- the basic structure 11 formed in this way can subsequently be provided on one or both sides with at least one fibrous nonwoven layer in order to complete a covering 10 in the form of a press felt.
- a web-shaped longitudinal reinforcement module 12 having a length and a width is provided. Furthermore, a material web 12 provided from the warp knitted fabric of FIG. 1 is provided with a length and a width which is wound onto a roll 23 and is present in the form of rolls.
- the material web 21 is in the longitudinal direction L of the longitudinal reinforcement module 12 side, ie in the transverse CMD direction of the fabric supplied by the respective free end 24 of Querverstärkungsmodulausgangsbahn 12 is guided by a longitudinal edge 25 of the L Lucassverstärkungsmoduls 12 to the other longitudinal edge 26 of the longitudinal reinforcement module 12 (see arrow) , After or during the feeding, the material web 21 is deposited on the longitudinal reinforcement module 12.
- portion of the web 21 is separated from the remaining web 21 to form a further material portion 21 b.
- the material section 21 a to be deposited on the longitudinal support module 12 can be separated from the remaining material web 21.
- the material sections 21a, 21b are cut such that their length corresponds to the width of the longitudinal reinforcement module 21 or the covering 10.
- a material section 21a has already been deposited on the longitudinal reinforcement module 12 while the material web 21 is laterally fed to the longitudinal reinforcement module 12 and deposited thereon, and after removal (not shown) is cut off is that the further material portion 21 b extends on the width of the longitudinal reinforcement module 12.
- the longitudinal reinforcement module 12 After depositing a formed by the warp knitted fabric portion 21 a on the longitudinal reinforcement module 12, the longitudinal reinforcement module 12 has been moved in its longitudinal direction MD relative to the material web 21 on a distance which substantially corresponds to the width of the material web 21. By repeating the previously described steps, it is achieved that the material sections 21 a, 21 b,... Are arranged one behind the other in the longitudinal direction MD of the press felt 10.
- the method is carried out in such a way that in the finished basic structure 11 each of the material sections 21 a, 21 b laid down on the longitudinal reinforcement module 12 extends along the width of the longitudinal reinforcement module 12 and the material sections 21 a, 21 b arranged one behind the other do not overlap with others Complete illustrated material sections to an uninterrupted position and form the transverse reinforcement module.
- the stored and cut transverse reinforcement module sections 4a, 4b,... are connected to the longitudinal reinforcement module 3 by the longitudinal reinforcement module 3 and the transverse reinforcement module section 4a, 4b, Heat are subjected by being passed around the heated roller 11.
- FIGS. 6a-6c Another alternative possibility for producing a press felt according to the invention is shown in FIGS. 6a-6c.
- a longitudinal reinforcement module 27 is provided as an endless belt. This may be a longitudinal thread layer or, as shown in FIG. 6a, a textile fabric formed as an endless fabric which is suitable for substantially providing the longitudinal stability of the fabric. Alternatively, it could also be a seam or woven fabric. When endless, the fabric 27 can be stretched between two mutually parallel spaced rollers 28, 29 for this purpose.
- an inventive transverse reinforcement module 1 is provided.
- a plurality of material sections 30.1, 30.2, 30.3, ... which are produced from a warp knitted fabric according to the invention and which extend in each case over the width of the fabric and only over part of the intended length of the fabric, lie one behind the other in the longitudinal direction of the fabric Length of the fabric arranged in addition and connected to the mutually facing transverse edges 31, 32, for example.
- the endless longitudinal reinforcement module 27, the endless transverse reinforcement module 1, as well as fiber fleece layers 33, 34 arranged above and / or below them are connected to one another by needling.
- the endless longitudinal reinforcement module 27 and the endless transverse reinforcement module 1 are placed on each other by being pulled over two rollers 36, 37 spaced parallel to one another.
- the longitudinal reinforcement module 27 and the transverse reinforcement module 1 laid thereon, together with the nonwoven fabric layers 33, 34, are a needling device 35 supplied, which the entire arrangement of longitudinal reinforcement module 27, transverse reinforcement module 1 and nonwoven fabric layers 33, 34 needled together.
Landscapes
- Paper (AREA)
- Knitting Of Fabric (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008043917A DE102008043917A1 (de) | 2008-11-20 | 2008-11-20 | Pressfilz und Verfahren zu seiner Herstellung |
| PCT/EP2009/065579 WO2010057989A1 (de) | 2008-11-20 | 2009-11-20 | Pressfilz und verfahren zu seiner herstellung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2358940A1 true EP2358940A1 (de) | 2011-08-24 |
| EP2358940B1 EP2358940B1 (de) | 2015-10-14 |
Family
ID=41692000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP09771728.4A Not-in-force EP2358940B1 (de) | 2008-11-20 | 2009-11-20 | Pressfilz und verfahren zu seiner herstellung |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8273218B2 (de) |
| EP (1) | EP2358940B1 (de) |
| CN (1) | CN102272380B (de) |
| BR (1) | BRPI0916033A2 (de) |
| DE (1) | DE102008043917A1 (de) |
| WO (1) | WO2010057989A1 (de) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009002433A1 (de) | 2009-04-16 | 2010-10-21 | Voith Patent Gmbh | Papiermaschinenbespannung |
| DE102010038622A1 (de) * | 2010-07-29 | 2012-02-02 | Voith Patent Gmbh | Verfahren zur Herstellung eines Bandes für eine Maschine zur Herstellung von Bahnmaterial, insbesondere Pressfilz |
| DE102011004568A1 (de) * | 2011-02-23 | 2012-08-23 | Voith Patent Gmbh | Pressenpartie einer Maschine zur Herstellung einer Faserstoffbahn |
| DE102011007291A1 (de) * | 2011-04-13 | 2012-10-18 | Voith Patent Gmbh | Verfahren zur Herstellung eines Moduls, insbesondere Endlosmoduls, für eine Papiermaschinenbespannung |
| DE102011007286A1 (de) * | 2011-04-13 | 2012-10-18 | Voith Patent Gmbh | Verfahren zur Herstellung eines Endlosmoduls für eine Papiermaschinenbespannung |
| CN102551186B (zh) * | 2011-12-14 | 2014-05-21 | 广东省金叶烟草薄片技术开发有限公司 | 可消除静电絮聚的低定量绒毛浆干法成型技术及装置 |
| CN102828436A (zh) * | 2012-09-04 | 2012-12-19 | 应城市恒达工业用呢有限公司 | 叠层底网造纸毛毯 |
| DE202014001502U1 (de) * | 2013-03-01 | 2014-03-21 | Voith Patent Gmbh | Gewobenes Sieb mit flachen Kettfäden |
| CA3177688A1 (en) | 2013-11-14 | 2015-05-21 | Gpcp Ip Holdings Llc | Soft, absorbent sheets having high absorbency and high caliper, and methods of making soft, absorbent sheets |
| DE102014201768A1 (de) | 2014-01-31 | 2015-02-12 | Voith Patent Gmbh | Verfahren zur Herstellung einer Bespannung |
| DE102014212301A1 (de) | 2014-06-26 | 2015-12-31 | Voith Patent Gmbh | Textile Flächenstruktur und Verfahren zu deren Herstellung |
| CN110820667B (zh) * | 2019-09-06 | 2023-12-12 | 山东鑫天河新材料科技有限公司 | 基于深水阻水的挡水帘和挡水幕布、释放水底装置和方法 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1058616A (en) * | 1964-01-31 | 1967-02-15 | Henry Johnson | Fourdrinier wires for paper-making machines |
| DE1660768A1 (de) | 1965-02-17 | 1971-07-15 | Filztuchverwaltungs Gmbh | Verfahren zur Herstellung textiler Flaechengebilde,insbesondere genadelte Papiermaschinenfilze,ohne Grundgewebe oder verstaerkende Einlagen |
| US3653961A (en) | 1970-02-11 | 1972-04-04 | Huyck Corp | Papermakers fabrics |
| GB1480339A (en) | 1973-07-28 | 1977-07-20 | Scapa Porritt Ltd | Paper machine clothing and a method for the production thereof |
| US4359069A (en) * | 1980-08-28 | 1982-11-16 | Albany International Corp. | Low density multilayer papermaking fabric |
| US4781967A (en) | 1987-10-07 | 1988-11-01 | The Draper Felt Company, Inc. | Papermaker press felt |
| US5118557A (en) | 1988-10-31 | 1992-06-02 | Albany International Corp. | Foam coating of press fabrics to achieve a controlled void volume |
| GB9521299D0 (en) | 1995-10-18 | 1995-12-20 | Scapa Group Plc | Papermakers dryer fabric |
| GB9803172D0 (en) * | 1998-02-14 | 1998-04-08 | Scapa Group Plc | Porous belts |
| US6630223B2 (en) * | 2001-01-26 | 2003-10-07 | Albany International Corp. | Spirally wound shaped yarns for paper machine clothing and industrial belts |
| EP1357223B1 (de) * | 2002-04-25 | 2006-05-17 | Thomas Josef Heimbach Gesellschaft mit beschränkter Haftung & Co. | Papiermaschinenbespannung sowie Verfahren zu deren Herstellung |
| US7455752B2 (en) * | 2004-07-22 | 2008-11-25 | Albany International Corp. | Semi-permeable fabrics for transfer belt and press fabric applications |
| DE102005035559A1 (de) | 2005-07-29 | 2007-02-01 | Voith Patent Gmbh | Papiermaschinenbespannung |
| PL1837440T3 (pl) | 2006-03-21 | 2012-03-30 | Heimbach Gmbh & Co Kg | Sposób wytwarzania taśmy filcowej oraz taśma filcowa |
| ES2372111T3 (es) | 2006-03-21 | 2012-01-16 | Heimbach Gmbh & Co. Kg | Procedimiento para fabricar una cinta de fieltro y cinta de fieltro. |
| DE102007055902A1 (de) | 2007-12-21 | 2009-06-25 | Voith Patent Gmbh | Band für eine Maschine zur Herstellung von Bahnmaterial |
| DE102008000915A1 (de) | 2008-04-01 | 2009-10-08 | Voith Patent Gmbh | Pressfilz und Verfahren zu seiner Herstellung |
| DE102008043855A1 (de) | 2008-11-19 | 2010-05-20 | Voith Patent Gmbh | Papiermaschinenbespannung und Verfahren zu deren Herstellung |
| BRPI0916035A2 (pt) | 2008-11-19 | 2015-11-17 | Voith Patent Gmbh | revestimento de máquina de papel e processo para sua fabricação |
| DE102009002175A1 (de) | 2009-04-03 | 2010-10-14 | Voith Patent Gmbh | Papiermaschinenbespannung und Verfahren zu deren Herstellung |
-
2008
- 2008-11-20 DE DE102008043917A patent/DE102008043917A1/de not_active Withdrawn
-
2009
- 2009-11-20 CN CN200980153740.6A patent/CN102272380B/zh not_active Expired - Fee Related
- 2009-11-20 WO PCT/EP2009/065579 patent/WO2010057989A1/de not_active Ceased
- 2009-11-20 EP EP09771728.4A patent/EP2358940B1/de not_active Not-in-force
- 2009-11-20 BR BRPI0916033A patent/BRPI0916033A2/pt not_active IP Right Cessation
-
2011
- 2011-05-20 US US13/112,518 patent/US8273218B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010057989A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102272380B (zh) | 2014-03-12 |
| EP2358940B1 (de) | 2015-10-14 |
| BRPI0916033A2 (pt) | 2015-11-10 |
| CN102272380A (zh) | 2011-12-07 |
| US20110290443A1 (en) | 2011-12-01 |
| WO2010057989A1 (de) | 2010-05-27 |
| US8273218B2 (en) | 2012-09-25 |
| DE102008043917A1 (de) | 2010-05-27 |
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