EP2898144A1 - Toile de machine à papier - Google Patents

Toile de machine à papier

Info

Publication number
EP2898144A1
EP2898144A1 EP14725393.4A EP14725393A EP2898144A1 EP 2898144 A1 EP2898144 A1 EP 2898144A1 EP 14725393 A EP14725393 A EP 14725393A EP 2898144 A1 EP2898144 A1 EP 2898144A1
Authority
EP
European Patent Office
Prior art keywords
threads
transverse
fabric layer
longitudinal
functional
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
Application number
EP14725393.4A
Other languages
German (de)
English (en)
Other versions
EP2898144B1 (fr
Inventor
Ipek Uymur
Wolfgang Heger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Andritz Technology and Asset Management GmbH
Original Assignee
Andritz Technology and Asset Management GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Andritz Technology and Asset Management GmbH filed Critical Andritz Technology and Asset Management GmbH
Priority to PL14725393T priority Critical patent/PL2898144T3/pl
Publication of EP2898144A1 publication Critical patent/EP2898144A1/fr
Application granted granted Critical
Publication of EP2898144B1 publication Critical patent/EP2898144B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water
    • D21F1/80—Pulp catching, de-watering, or recovering; Re-use of pulp-water using endless screening belts
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D11/00—Double or multi-ply fabrics not otherwise provided for
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D21F1/0036—Multi-layer screen-cloths
    • D21F1/0045—Triple layer fabrics

Definitions

  • the present invention relates to a multilayered
  • Papermaking fabric e.g. a sheet forming sieve one
  • Paper machine in particular a forming screen as in the process of papermaking in the sheet forming zone of a wet end of a paper machine for dewatering / filtration of a Fasers offSuspension or a paper pulp
  • Such screens are primarily used for high quality graphic papers and low paper weight / basis weight packaging papers and high printability requirements. These papers can be produced with so-called gap formers or Ga-formers at speeds of more than 2000 m / min. Here are high demands on the mechanical stability, the
  • Pulp suspension is understood to mean one in water
  • the water content is reduced by the above-mentioned filtration process to about 80%.
  • the paper page is commonly referred to as Sieboberseite and is responsible for the formation of the paper sheet.
  • these sieves have a running side, which is formed by the underside of a lower fabric.
  • the running side which can also be referred to as the underside of the screen, comes into contact with the elements of the paper machine.
  • the respective screen side has a machine direction (usually longitudinal direction) and a
  • Paper machine wire is 90 ° rotated direction, i. the arranged transversely to the direction of the paper and the screen direction.
  • Paper machine screens can usually be neither paper and running side, nor longitudinal / machine and transverse direction
  • the machine direction threads ⁇ longitudinal threads), which realize the circulation of the screen, by significantly over- or. projecting transverse threads are protected from wear.
  • the paper side e.g. by providing a
  • the plain weave is for the formation of a paper sheet and thus for the paper side, so little is it usually suitable for the running side. Is a paper machine screen with a canvas paper side
  • a particular challenge in this context is the connection of the two layers (i.e., the top side forming the paper side with the bottom side forming the running side), i.a.
  • Binding threads provides, which extend in the longitudinal and / or transverse direction. According to this approach, two finished,
  • the two layers of fabric consist of longitudinal thread and transverse threads which run exclusively in the respective fabric layer and thereby completely produce the respective fabric layer pattern or the respective fabric layer weave.
  • Procedure is e.g. described in CA 1 115 177 AI, where separate binding wefts are used, which with
  • bind, and DE 39 28 484 AI are used in the separate warp threads as connecting threads. Further examples can be found in DE 42 29 828 A1, WO 93/00472 and EP 0 136 284 A2.
  • the separate binding threads usually become thinner
  • binding threads would disturb the originally homogeneous structure of the binding, so that especially in the plain weave provided on the paper side
  • Threads serve on the one hand to connect the layers, for which they switch back and forth between the layers, and on the other hand form the upper tissue and / or the lower tissue (esp.
  • Binding or overlapping pattern with. It can be
  • Transverse threads or alternatively longitudinal threads which structurally form the topsheet, the different structural threads being different
  • Under weave tying thread section e.g. at the same time complete the lower tissue or its binding.
  • Under weave tying thread section e.g. at the same time complete the lower tissue or its binding.
  • an upper transverse thread which exclusively completes the plain weave (i.e., which runs only in the upper fabric) but has no binding function.
  • tissue connected via functional transverse thread pairs can also be referred to the following patent literature:
  • EP 1 021 616 Bl by Kevin J. Ward shows a fabric in which the paper side in the transverse direction exclusively by
  • EP 1 754 820 AI by Johann Boeck shows a fabric in which on the paper side alternately two pure upper transverse threads and a functional transverse thread pair in the longitudinal direction one behind the other are arranged ⁇ see Figure 1 of the above
  • Longitudinal thread is supported exclusively by functional transverse thread pairs, which form change points.
  • all pure upper shots or upper transverse threads lie on the same warp threads or upper longitudinal threads (esp. On every other warp thread).
  • the present invention now describes a
  • the sieve according to the invention can be classified as one of the subgroups in which the two transverse threads of a j take place
  • the sieve according to the invention can be included in that subgroup in which both transverse threads of a respective transverse cross-section pair are designed as binding transverse threads, so that a high number of connections can be achieved.
  • Object of the present invention is a
  • Sheet forming screen made of a multi-layered fabric
  • Papermaking fabric according to claim 1 ready. Further, Papermaking fabric according to claim 1
  • Sheet forming screen is formed as a cross-linked, multi-ply (e.g., two-ply) fabric having an upper fabric layer having a first weave and a lower fabric layer having a second weave.
  • the multi-ply fabric has an overall repeat (e.g., it is made up of
  • the ratio of the upper longitudinal threads to the lower longitudinal threads is 1: 1, the lower longitudinal threads have a diameter which is greater than or equal to the diameter of the upper longitudinal threads, and the lower transverse threads have a diameter which is greater than the diameter of the upper Querf the ,
  • binding transverse threads form functional transverse thread pairs of two each directly within the total repeat juxtaposed binding transverse threads, wherein the two binding transverse threads of a j eology functional
  • Insert binding pattern of the top and esp. the transition typical of the binding of an upper transverse thread (with respect to the upper longitudinal threads ⁇ assumes) in alternation complete the first binding and thereby each one or more upper longitudinal threads overflow, and wherein the two binding
  • Cross threads of a respective / each functional transverse thread pair alternately the lower fabric layer with that of the lower
  • Fabric layer within the total repeat undergoes at least one lower longitudinal thread.
  • the functional transverse thread pairs in the upper fabric layer in the longitudinal direction are arranged in groups of two or more (eg exactly two) immediately adjacent functional transverse thread pairs (especially without an upper transverse thread therebetween), two successive groups each are separated by one or two or more upper transverse threads.
  • a characteristic feature of the sieve according to the invention is the grouping (e.g.
  • the individual groups are separated by one or more pure upper transverse threads.
  • the screen according to the invention on the paper side / top in
  • alternating arrangement "a functional transverse thread pair, an upper transverse thread" which arrangement leads to isolated / isolated functional transverse thread pairs, uses an arrangement in which the functional transverse thread pairs are grouped at least in pairs, so at least two immediately successive functional transverse thread pairs are present in the longitudinal direction (without an upper cross thread in between).
  • the functional transverse thread pairs can also be grouped (eg arranged in pairs), whereby the individual groups are separated from each other by one or more (eg exactly two) pure lower transverse threads.
  • the functional transverse thread pairs can also be grouped (eg arranged in pairs), whereby the individual groups are separated from each other by one or more (eg exactly two) pure lower transverse threads.
  • the two binding transverse threads of a respective transverse thread pair can alternately tie the lower fabric layer to the upper fabric layer by the respective binding transverse thread of a respective functional transverse thread pair during its course in the lower fabric layer within the
  • Underlay fabric layer (at least) another lower longitudinal thread.
  • the first binding may be a plain weave (e.g., an 8, 10, or 12-shank plain weave) which may be in
  • Cross thread pairs formed imaginary upper transverse threads is formed.
  • a plain weave is as described above for the paper side particularly advantageous or has been proven for the paper side.
  • the total repeat and / or the repeat of the upper fabric layer may contain 8, 10 or 12 upper longitudinal yarns.
  • the second bond may be a 5-shaft bond or a
  • cross-threading e.g. over a lower longitudinal thread and under four consecutive lower longitudinal threads or e.g. over two consecutive lower longitudinal threads and below eight consecutive lower longitudinal threads.
  • the overall repeat may include: 10 upper longitudinal threads, 10 lower longitudinal threads, 10 upper transverse threads, 10 lower transverse threads and 20 binding transverse threads, which form 10 functional transverse thread pairs.
  • the overall repeat may e.g. contain: 10 upper longitudinal threads, 10 lower longitudinal threads, 10 upper transverse threads, 20 lower transverse threads and 40 binding transverse threads, which are 20
  • binding cross threads made of polyamide.
  • the binding transverse threads may have a diameter that is less than the diameter of the lower transverse threads.
  • the paper side can be formed finer, and the binding transverse threads do not disturb the lower binding and can also on the running side of the thicker bottom
  • Cross threads may in particular have the same diameter as the upper transverse threads and / or the same diameter as the upper longitudinal threads, so that they fit well into the upper
  • Insert overlap pattern That is, e.g. can upper
  • Cross threads, binding transverse threads and upper longitudinal threads all have the same diameter.
  • the total repeat in the upper fabric layer e.g. also in the lower tissue layer, a total of five groups or ten groups of functional pairs.
  • the longitudinal threads are formed as warp threads and the transverse threads as weft threads.
  • Cross threads including functional transverse thread pairs, to be greater than 1 to lower transverse threads, in particular 2: 1, for example 20:10, or 3: 2, for example 30:20.
  • the inventive screen on the paper side thus have a high fineness to ensure proper fiber support.
  • the running side can be an increased openness to the paper side for a good
  • the running side has a high in particular
  • the inner wear and ultimately a ply separation can be in the multilayer
  • Sheet forming screen the fabric layers are connected by upper transverse threads together, avoided or greatly reduced.
  • a fine fabric having a very homogeneous design can be used for sheet formation and attached to a sheet
  • Upper fabric is preferably realized with a plain weave and thus ideally suited for the production of graphic paper.
  • the lower tissue is esp. coarser in the longitudinal direction and can e.g. offer the following advantages: any solids that have penetrated into the tissue through the upper tissue are not retained in the lower tissue; the
  • each functional transverse thread pair can form precisely two intersection points at which the two binding transverse threads belonging to the pair intersect (in particular below an upper longitudinal thread) and change into the respective other fabric layer.
  • the two binding transverse threads belonging to the pair intersect (in particular below an upper longitudinal thread) and change into the respective other fabric layer.
  • Intersections are positioned, e.g. exactly two or exactly four. This can make a uniform paper page
  • Warp threads of the loom formed. Round fabric, on the other hand
  • transverse threads threads of the screen / fabric are referred to, which extend in the transverse direction of the screen and are arranged transversely to the running direction of the paper machine during operation.
  • the transverse threads are formed by the shots.
  • Round fabrics realize the transverse threads with the chains of the loom.
  • As a fabric layer is usually a single-layer fabric understood, comprising or consisting of interwoven transverse threads and longitudinal thread (or chains and shots).
  • the upper fabric or the upper fabric layer is usually a particularly fine fabric layer, of which i. d. R. the
  • Paper fiber layer is formed.
  • the upper fabric is on the "logical top” of the screen.
  • Upper longitudinal threads are such threads that are exclusively in the upper fabric and there are interwoven with running in the upper fabric Querf the. Upper longitudinal thread leave that
  • Upper transverse threads are such threads which are exclusively in the upper fabric and there with the upper longitudinal threads
  • Upper transverse threads run exclusively in the upper tissue and do not change into the lower tissue.
  • upper transverse threads and upper longitudinal threads together partially form the first, upper binding which
  • the binding transverse threads or functional pairs (see below) is completed. That is, figuratively speaking, in the upper tissue, by omitting a predetermined one Number of upper transverse threads creates gaps that are closed by the functional pairs again.
  • the first, upper binding is a plain weave.
  • Lower longitudinal threads are those threads that are exclusively in the lower tissue and there with in the lower tissue
  • Lower longitudinal threads do not leave the lower tissue, i. they do not change into the tissue.
  • Lower transverse threads are those threads that are exclusively in the lower fabric and are interwoven there with the lower longitudinal threads. Lower transverse threads do not leave the lower tissue, i. they do not change into the upper tissue.
  • lower transverse threads and lower longitudinal threads together completely form the second, lower binding.
  • Binding transverse threads are such transverse threads which run both in the upper fabric layer and in the lower fabric layer and thereby bind the lower fabric layer to the upper fabric layer.
  • a functional cross-thread pair is formed from two directly adjacent binding transverse threads (see also the comments made at the beginning on functional cross-threads)
  • the two transverse threads of a functional transverse thread pair together form an imaginary (uninterrupted) upper transverse thread, which inserts into the binding pattern of the upper side, ie they complete the first binding alternately and in each case overrun one or more upper longitudinal threads.
  • Those thread sections of the functional pair which are not just for the formation of paper-side virtually uninterrupted Cross-threading can be used to connect the lower fabric to the upper fabric.
  • both transverse threads of a respective functional transverse thread pair alternately bind the lower fabric layer with the second binding which is completely formed by the lower longitudinal threads and the lower transverse threads, to the upper one
  • both transverse threads of a respective functional transverse thread pair underflows during its course in the lower fabric layer within the overall repeat at least one (for example exactly one) lower longitudinal thread. That , According to the invention, both transverse threads of a respective functional transverse thread pair underflows during its course in the lower fabric layer within the overall repeat at least one (for example exactly one) lower longitudinal thread. That , According to the invention, both transverse threads of a respective functional transverse thread pair underflows during its course in the lower fabric layer within the overall repeat at least one (for example exactly one) lower longitudinal thread. That , According to the invention, both transverse threads of a respective
  • Binding pattern / thread overlapping pattern of the entire fabric including upper and lower fabric, in particular the smallest repeating unit of the entire fabric, the course of all threads (upper and lower longitudinal threads, upper and lower transverse threads, binding cross-sections) to each other
  • the tissue can come from a variety of
  • Binding repeat is a repeating pattern or unit in the topsheet of interwoven top longitudinal threads, top cross threads, and binding cross stitches, particularly the smallest repeating ones
  • the upper binding repeat relates to the course of the upper transverse threads and regarding binding transverse threads. the upper longitudinal threads and the resulting overlapping pattern; the course of the binding
  • the lower longitudinal threads have no meaning for the determination of the upper bond repeat. If one considers only the upper virtual / imaginary transverse thread ⁇ without taking into account the change point (s)) for the respective unctional transverse thread pair, the so-called virtual / imaginary upper binding repeat, e.g. can be realized in the form of a plain weave.
  • the binding repeat of the lower tissue or the so-called. lower weave repeat is a repeating pattern or unit in the lower fabric of interwoven lower longitudinal and lower transverse threads
  • Run side of the screen are a variety of such lower
  • the lower bond repeat thus insb. the recurring formed in the plan view of the lower fabric of the lower longitudinal threads and the lower transverse threads
  • the lower binding repeat relates to the course of the lower transverse threads with respect. the lower longitudinal threads and the resulting overlapping pattern; the course of the binding Cross threads in the lower fabric has for the lower one
  • Figure 1 shows a section of a known sieve, esp. From its upper fabric layer, wherein on the
  • Paper side longitudinally repeating characteristic arrangement / subunit of two successive upper Querf den and a functional cross-thread pair is shown, i. on the paper side are alternately two upper transverse threads and a functional transverse thread pair in the longitudinal direction
  • Cross thread course (in particular the course of the binding transverse threads) is repeated after 10 upper longitudinal threads.
  • the functional transverse thread pair forms an imaginary upper transverse thread, which together with the two upper transverse threads and the upper
  • Subunit can be shifted in the transverse direction.
  • the characteristic subunit contains only one
  • Figure 2 shows a section of another known sieve, esp. from its upper fabric layer, which repeats on the paper side in the longitudinal direction
  • Querfadenverlauf esp. The course of the binding transverse threads is repeated after 10 upper L Lucasst the.
  • the functional transverse thread pair forms an imaginary upper transverse thread, which forms a plain weave together with the upper transverse thread and the upper longitudinal thread.
  • the change points of the longitudinal sub-unit may be transversely displaced.
  • the characteristic subunit contains only a functional Querfadenpaa.
  • FIG. 3 shows a detail of a sieve according to the invention, in particular its upper fabric layer, wherein the characteristic arrangement / subunit of two
  • Querfadenploen is shown (the two upper transverse threads and the two functional Querfadenploe are arranged in pairs), i. on the paper side are alternately a pair of upper transverse threads and a pair of functional ones
  • Querfadencruen arranged in the longitudinal direction one behind the other. Furthermore, it is indicated that it is a 10-shaft bond, i.
  • the transverse thread course esp. the course of the binding transverse threads
  • FIG. 4 shows a detail of a sieve according to the invention, in particular of its upper fabric layer, wherein the characteristic arrangement / subunit of two which repeats on the paper side / upper side in the longitudinal direction
  • successive functional transverse thread pairs is shown that is, on the paper side, alternately arrange a pair of upper transverse threads and a pair of functional yarn pairs in the longitudinal direction one after the other. Furthermore, it is indicated that it is an 8-shank bond, ie the transverse thread course (esp. The course of the binding transverse threads) is repeated after 8 upper longitudinal threads.
  • FIG. 5 shows a detail of a sieve according to the invention, in particular its upper fabric layer, wherein the characteristic arrangement / subunit of two
  • transverse thread pairs i. On the paper side, a pair of upper transverse threads and a pair of functional transverse thread pairs are alternately arranged longitudinally in succession. Furthermore, it is suggested that this is a 12-shaft bond, i. the transverse thread course (esp. the course of the binding transverse threads) is repeated after 12 upper longitudinal threads.
  • FIG. 6 shows a detail of a sieve according to the invention, esp. from its upper fabric layer, wherein the repetitive on the paper side / top longitudinal characteristic arrangement / subunit of an upper transverse thread and two successive functional
  • Cross thread pairs is shown, i. On the paper side, an upper transverse thread and a pair of functional transverse thread pairs are alternately arranged longitudinally one behind the other. Furthermore, it is indicated that it is a 10-shaft bond, i.
  • the transverse thread course esp. the course of the binding transverse threads is repeated after 10 upper
  • the functional transverse thread pairs each form an imaginary upper transverse thread which forms a plain weave together with the upper transverse threads or the upper transverse thread and the upper longitudinal threads.
  • Subunit can be shifted in the transverse direction.
  • the respective characteristic subunit contains - unlike in the prior art according to Figures 1 and 2 - two in
  • FIGS. 7a and 7b show the overall repeat of a paper machine screen, esp. Sheet forming screen, serving multi-layer fabric according to a first embodiment of the invention, in particular the courses of all transverse threads of the overall repeat with respect. the lower and upper longitudinal threads.
  • Figure 8 shows a Drau view of the upper fabric layer of the total repeat. This corresponds at the same time to a plan view of the weave repeat of the upper fabric layer.
  • FIG. 9 shows a plan view of the lower fabric layer of the overall repeat. This corresponds at the same time to a plan view of the weave repeat of the lower fabric layer.
  • FIGS. 10a to 10d show the overall repeat of a paper machine screen, esp. Sheet forming sieve, serving
  • multilayer fabric according to a second embodiment of the invention, in particular the courses of all transverse threads of the overall repeat. the lower and upper longitudinal threads.
  • FIG. 11 shows a plan view of the upper fabric layer of the overall repeat. This corresponds at the same time to a plan view of the repeat of the upper fabric layer.
  • FIG. 12 shows a plan view of the lower fabric layer of the overall repeat. This corresponds at the same time to a plan view of eight immediately adjacent binding repeats of the lower fabric layer.
  • Figure 1 shows a section of the upper fabric layer of a known screen, which on the paper side in
  • FIG. 2 shows a detail of the upper fabric layer of another known fabric, which illustrates the characteristic subunit always repeating on the paper side in the longitudinal direction of an upper transverse thread and a functional transverse thread pair (again for a 10-shaft plain weave). That is, according to this known sieve are on the paper side in the longitudinal direction alternately an upper
  • FIGS. 3 to 5 each show a detail of a sieve according to the invention, in particular its upper fabric layer, which shows the respective subunit of two successive upper transverse threads and two longitudinally repeating on the paper side / upper side
  • Fabrics / screens are alternating on the paper side in the longitudinal direction / alternately a pair of upper transverse threads and a pair of functional transverse thread pairs in succession
  • FIG. 3 shows this for the case of a 10-shank plain weave
  • FIG. 4 for the case of an 8-shank plain weave
  • FIG. 5 for the case of a 12 shawl plain weave.
  • Figure 6 shows a section of a sieve according to the invention, esp. from its upper fabric layer, with the longitudinal side repeating of the paper side / top characteristic subunit being shown by an upper transverse thread and two successive functional transverse thread pairs (exemplified by a 10-shank plain weave). That on the paper side, an upper transverse thread and a pair of functional transverse thread pairs are alternately arranged longitudinally one behind the other.
  • the functional transverse thread pairs are according to the invention arranged on the paper side in groups separated by upper transverse threads, eg in pairs (or contains the characteristic subunit immediately adjacent functional transverse thread pairs).
  • FIGS. 7a, 7b, 8 and 9 show the overall repeat of a multi-ply fabric serving as a papermaking fabric, in particular a forming fabric, according to a first embodiment of the invention, wherein FIGS. 7a and 7b show the progressions of all transverse threads (upper, lower and binding transverse threads) of the invention
  • FIG. 8 shows a plan view of the upper fabric layer (or upper side) of the overall repeat
  • FIG. 9 shows a plan view of the lower fabric layer of the overall repeat.
  • the threads running from left to right in the figures are transverse threads (e.g., weft threads), and the threads extending from the bottom to the top in the figures are longitudinal and vertical, respectively.
  • Machine direction yarns e.g., warp yarns.
  • the multi-ply fabric has an upper fabric layer having a first weave (see Figure 8, e.g., the upper fabric layer forms the so-called paper side of the fabric) and a lower, second weave
  • Fabric layer (see Figure 9, e.g., the lower fabric layer forms the so-called running side of the fabric). These two fabric layers are connected to each other via (binding) transverse threads or
  • Tissue can be designated.
  • the multi-layered fabric is formed of (eg, consists of or exclusively formed of) one (located in the tissue
  • the ratio of the upper longitudinal threads 1, 3, 5, 7, 9 etc. to the lower longitudinal threads 2, 4, 6, 8, 10 etc. is 1: 1.
  • the ratio of the upper longitudinal threads to the lower longitudinal threads in the overall repeat can be e.g. Be 10:10 (alternatively, for example, 12:12 or 8: 8).
  • the course of the binding threads of a respective transverse thread pair may repeat in the transverse direction after 8, 10 or 12 upper longitudinal threads.
  • the lower longitudinal threads 2, 4, 6, 8, 10 etc. have a
  • upper and lower longitudinal threads can be the same, for example Have diameter.
  • the overall repeat and esp. the entire fabric can be formed in the longitudinal direction exclusively with upper and lower longitudinal threads. That is, in the overall repeat, esp. In the entire multi-layer fabric, all extending in the upper fabric layer longitudinal threads can be upper longitudinal threads, which exclusively in the upper fabric layer
  • the lower transverse threads are thicker than the upper transverse threads.
  • the underside of the screen coming in contact with the paper machine can be replaced by the thicker lower one
  • Cross threads are made robust, whereas the coming into contact with the fiber suspension top of the screen can be formed finely by means of the thinner upper transverse threads.
  • the binding transverse threads 104 -107, 112-115, 120-123 are e.g. also thinner than the lower transverse threads, and also have e.g. the same diameter as the upper transverse threads, so that the imaginary upper transverse thread formed by the respective functional pair fits well in the
  • the ratio of the upper transverse threads to the lower transverse threads may be e.g. 1: 1, e.g. 10:10. By the way, do you?
  • the ratio (upper transverse threads + imaginary upper transverse threads) / lower transverse threads is e.g. 2: 1, especially 20:10. In other words, the
  • Paper side / top of the screen to be formed finer than the comparatively coarse running side / bottom of the screen.
  • the functional transverse thread pairs are assigned to the upper fabric layer, since they contribute there to the formation of the first bond, whereas they serve in the lower fabric layer only for connection.
  • the ratio of upper transverse threads to functional pairs may be e.g. 1: 1, e.g.
  • the upper crossfs may e.g. of polyester and the binding transverse threads e.g. be made of polyamide.
  • the binding transverse threads within the overall repeat form so-called functional transverse thread pairs 104 + 105, 106 + 107, 112 + 113, etc. from in each case two immediately adjacent binding transverse threads.
  • each functional pair of transverse yarns may be interchangeable
  • each total repeat has exactly two change points.
  • the change points of all functional pairs can be distributed uniformly within the overall repeat, for example, on the upper longitudinal thread, eg accounts for two change points on each upper longitudinal thread.
  • the two transition points of a respective pair may slope upwardly through "3 longitudinal upper threads" through the overall repeat.
  • the two binding transverse threads of a respective functional transverse thread pair alternately bind the lower fabric layer with the second binding, which is completely formed by the lower longitudinal threads and the lower transverse threads, to the upper fabric layer, in which the respective binding layer is attached
  • Pairs of transverse threads (e.g., arranged in pairs as shown in Figure 8), with two successive groups A-D separated from each other by one or two or more upper transverse threads (e.g., by exactly two upper ones)
  • Querfadencoveren be arranged ⁇ "pairwise arrangement" wherein two successive groups are each separated by exactly two upper transverse threads.
  • two successive groups are each separated by exactly two upper transverse threads.
  • Querfadencrue arranged in the longitudinal direction one behind the other.
  • the overall repeat may be on the top, e.g. a total of five
  • the functional transverse thread pairs 104 + 105, 106 + 107, etc. in the overall repeat can be arranged in groups A- ⁇ of two or more functional transverse thread pairs arranged directly behind one another ⁇ arranged in pairs, as shown in Figure 9), wherein between two successive groups of functional transverse thread pairs one or two or more lower transverse threads are arranged (eg exactly two lower transverse threads, as shown in Figure 9).
  • the functional transverse thread pairs in the lower fabric layer may be in FIG. 9
  • the total repeat may include a total of five groups A-E on the underside.
  • the transverse threads 104-107 tie
  • Cross threads 112-115 bond between the two lower transverse threads 111 and 116.
  • the intermediate spaces formed between the lower transverse threads can be alternately occupied and unoccupied in the longitudinal direction, as seen in the longitudinal direction, with ties through the binding transverse threads of a respective group of functional transverse thread pairs.
  • each binding transverse thread in the lower fabric layer can undercut / tie another lower longitudinal thread.
  • the first binding may advantageously be a plain weave formed longitudinally of the upper longitudinal threads and transversely of the upper transverse threads and the imaginary upper transverse threads formed by the functional transverse thread pairs.
  • a plain weave is of particular advantage for the paper side and the sheet formation.
  • the second bond can be a ten-shank bond, in which the course of the intermingling lower transverse thread 103, 108, 111, 116, etc. in the transverse direction after 10 lower longitudinal threads 2, 4, 6, 8, 10, 12, etc.
  • the course of the respective transverse thread is e.g.
  • this transverse thread path may extend from the bottom to the top through the overall repeat of the "bottom 3" longitudinal thread (above) adjacent rapport then has again a course identical to that of the lower transverse thread 103.
  • each lower longitudinal thread can be undermined by exactly two binding transverse threads.
  • the lower longitudinal thread 2 is bound by the transverse threads 114 and 136.
  • the transverse threads 114 and 136 are bound by the transverse threads 114 and 136.
  • the sieve or fabric of the first embodiment belongs to the group of transverse thread-bonded fabrics described at the outset, esp. to the group of tissues by functional
  • Cross-thread pairs are connected, which provide at the top of a virtually uninterrupted structural upper transverse thread, and has the advantage of a reduced compared to a transverse thread-bonded tissue in the Rescuerapport at the top no upper transverse threads are present (but only functional transverse thread pairs)
  • the sieve or fabric of the first embodiment has the advantage of a reduced Markierneson compared to a cross-thread-bonded fabric in the overall rapport at the top no cross-threading, since the upper transverse threads bring a tissue balance with it (eg, the tissue or For example, the upper longitudinal threads are pushed up more strongly by the upper transverse threads than by the functional transverse thread pairs which form the change parts).
  • the sieve or fabric of the first embodiment also has the advantage of a reduced tendency to march over a cross-thread-bonded fabric in whose overall repeat at the top in the longitudinal direction an upper transverse thread and a functional transverse thread pair are alternately arranged, since in the latter case each second upper longitudinal thread is exclusive supported by functional couples. This can be broken by the paired arrangement of the functional pairs with two upper transverse threads disposed therebetween, in which case each upper longitudinal thread (at least
  • connection of the bottom or a stable layer connection are ensured, i. Sufficient bonding points can be provided for layer bonding.
  • Sufficient bonding points can be provided for layer bonding.
  • an increase in the number of binding points for the layer connection per fiber support index (Beran FSI) can be achieved on the paper side compared with the prior art according to FIG.
  • FIGS. 10a-10d, 11 and 12 show the overall repeat of a paper machine screen, in the form of a paper machine screen.
  • Sheet forming screen, serving multi-layer fabric according to a second embodiment of the invention wherein the figures 10a to lOd with respect to the course of the respective cross-thread with respect.
  • FIG. 11 shows a plan view of the upper fabric layer or upper side of the overall package
  • FIG. 12 shows a plan view of the lower fabric layer of the overall package.
  • the threads running from left to right in the figures are transverse (eg weft threads), and the threads running from bottom to top in the figures are longitudinal or machine direction threads (eg warp threads).
  • transverse threads eg weft threads
  • the threads running from bottom to top in the figures are longitudinal or machine direction threads (eg warp threads).
  • the multi-ply fabric has an upper fabric layer having a first weave (see FIG. 11) and a lower fabric weave having a second weave (see FIG. 11).
  • Transverse threads connected or held together can be referred to as transverse thread-bonded tissue.
  • the tissue can be referred to as transverse thread-bonded tissue.
  • transverse thread-bonded tissue can the upper one
  • Fabric layer and the lower fabric layer in the overall repeat be connected to each other exclusively by the binding cross-threads arranged to functional transverse thread pairs, i. e.g. free of separate binders.
  • the multi-layered tissue is formed of (e.g., exclusively formed from) one (repeating in the tissue)
  • upper transverse threads 40, 411, 418, 425, etc. which run exclusively in the upper fabric layer and with the upper longitudinal threads with partial formation of the first
  • Woven fabric layer and are interwoven with the lower longitudinal threads with complete formation of the second bond, and binding transverse threads 406-409, 413-416, 420-423, 427-430 etc. which in each case run both in the upper fabric layer and in the lower fabric layer (ie, these threads change back and forth between the two fabric layers) and thereby tie the lower fabric layer to the upper fabric layer.
  • the ratio of the upper longitudinal threads to the lower longitudinal threads is analogous to the first embodiment 1: 1. As can be seen in the figures, the ratio of the upper longitudinal threads to the lower longitudinal threads in the. eg 10: 10.
  • the lower longitudinal threads have a diameter which is greater than or equal to the diameter of the upper Lssensf.
  • upper and lower longitudinal threads may e.g. have the same diameter.
  • the overall repeat and esp. the entire tissue can e.g. free of binding longitudinal threads, i. be formed in the longitudinal direction exclusively with upper and lower longitudinal threads. That is, in the overall repeat, esp. in the entire multi-layered fabric, all longitudinal threads running in the upper fabric layer can be upper longitudinal threads which are exclusively in the upper fabric layer
  • the lower Querf have the one
  • the lower transverse threads are made thicker than the upper transverse threads.
  • the binding transverse threads are e.g. also thinner than the lower transverse threads, and also have e.g. the same diameter as the upper one
  • the ratio of the upper transverse threads to the lower transverse threads may be e.g. 1: 2, e.g. 10:20.
  • the ratio (upper transverse threads + imaginary upper transverse threads) / lower transverse threads is 3: 2, ins. 30:20.
  • the functional transverse thread pairs are assigned to the upper fabric layer, since they contribute to the formation of the first bond, whereas they are in the lower
  • Fabric layer only serve for connection.
  • the top can thus be formed finer than the relatively coarse
  • the ratio of upper transverse to functional pairs may e.g. 1: 2, e.g. 10:20.
  • the upper transverse threads may e.g. of polyester and the binding transverse threads e.g. be made of polyamide.
  • Embodiment form the binding transverse threads within the Intelrapporte so-called. functional transverse thread pairs of two immediately adjacent binding
  • functional pairs can be distributed evenly on the upper longitudinal thread within the overall repeat, wherein, for example, four change points can be omitted on each upper longitudinal thread.
  • This following on functional pair 469 + 470 (not shown) functional pair of the next Gesaratrapports (in the longitudinal direction above the repeat shown) has a
  • Fabric layer within the overall repeat undergoes at least one lower longitudinal thread (e.g., just one lower
  • Pairs of transverse threads e.g., arranged in pairs as shown in Figure 11, with respect to the pair J being counted across the edge), with two successive groups A-J each being defined by one or two or more upper transverse threads
  • an upper transverse thread and a pair of functional transverse thread pairs in the longitudinal direction are arranged one behind the other in alternation
  • the overall repeat can on the top eg a total of ten groups AJ
  • Cross-thread pairs in the overall repeat e.g. also seen in the lower fabric layer in the longitudinal direction in groups A -J of two or more immediately behind one another
  • transverse threads 406-409 bind between the two lower transverse threads 405 and 410, and the transverse threads 413-416 tie between the two lower transverse threads 412 and 417.
  • the intermediate spaces formed between the lower transverse threads may be alternately occupied and unoccupied in the longitudinal direction, alternately with attachments by the binding transverse threads of a respective group of functional transverse thread pairs.
  • the first binding may advantageously be a plain weave formed longitudinally of the upper longitudinal threads and transversely of the upper transverse threads and the imaginary upper transverse threads formed by the functional transverse thread pairs.
  • other bindings for the paper side are also conceivable,
  • the second binding may be a 5-shank bond in which the length of the respective lower transverse thread 403, 405, 410, 412, etc. in the transverse direction becomes 5 lower longitudinal threads 2, 4, 6 , 8, 10, 12, etc. repeated .
  • the course of the respective transverse thread is e.g. "Over a lower longitudinal thread, and then under four consecutive lower longitudinal threads” ⁇ viewed from above, counting “over the edge", i. after the lower longitudinal thread 20 follows the lower longitudinal thread 2).
  • this transverse thread can be laid with a pitch of "2
  • each lower longitudinal thread can have exactly four binding transverse threads
  • the sieve or fabric of the second embodiment has the advantage of a reduced tendency to march over a cross-linked fabric in whose overall repeat at the top no upper transverse threads are present, since the upper transverse threads have a fabric balance with them
  • Tissue in its overall repeat at the top in
  • topside can provide a reliable connection of the

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Paper (AREA)
  • Woven Fabrics (AREA)

Abstract

L'invention concerne une toile de machine à papier qui est réalisée sous la forme d'un tissu multicouche à liaison par fibres transversales, lequel présente un rapport d'armure global qui contient : des fils de chaîne supérieurs (1, 3, 5, etc.) qui s'étendent exclusivement dans une couche tissée supérieure, des fils de chaîne inférieurs (2, 4, 6, etc.) qui s'étendent exclusivement dans une couche tissée inférieure, des fils de trame supérieurs (101, 102, 109, 110, 117, 118, etc.) qui s'étendent exclusivement dans la couche tissée supérieure et qui sont tissés avec les fils de chaîne supérieurs en formant partiellement une première liaison, des fils de trame inférieurs (103, 108, 111, 116, 119, 124, etc.) qui s'étendent exclusivement dans la couche tissée inférieure et qui sont tissés avec les fils de chaîne inférieurs en formant totalement une deuxième liaison, et des fils de trame de ligature (104-107, 112-115, 120-123, etc.) qui s'étendent respectivement à la fois dans la couche tissée supérieure et dans la couche tissée inférieure et attachent ainsi la couche tissée inférieure à la couche tissée supérieure. Les fils de trame de ligature forment au sein du rapport d'armure global des paires de fils de trame fonctionnelles dont les fils de trame complètent en alternance la première liaison. Dans le rapport d'armure global, les paires de fils de trame fonctionnelles dans la couche tissée supérieure, vus dans le sens longitudinal, sont disposés en groupes (A-E) comprenant respectivement deux paires de fils de trame fonctionnelles ou plus disposées directement les unes derrière les autres.
EP14725393.4A 2013-06-18 2014-05-07 Toile de machine a papier Active EP2898144B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14725393T PL2898144T3 (pl) 2013-06-18 2014-05-07 Sito maszyny papierniczej

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013106327.6A DE102013106327B4 (de) 2013-06-18 2013-06-18 Papiermaschinensieb
PCT/EP2014/059358 WO2014202277A1 (fr) 2013-06-18 2014-05-07 Toile de machine à papier

Publications (2)

Publication Number Publication Date
EP2898144A1 true EP2898144A1 (fr) 2015-07-29
EP2898144B1 EP2898144B1 (fr) 2016-02-17

Family

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EP14725393.4A Active EP2898144B1 (fr) 2013-06-18 2014-05-07 Toile de machine a papier

Country Status (10)

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US (2) US9528223B2 (fr)
EP (1) EP2898144B1 (fr)
JP (1) JP5879467B2 (fr)
KR (1) KR101631539B1 (fr)
CN (1) CN105143549A (fr)
BR (1) BR112015013393B1 (fr)
DE (1) DE102013106327B4 (fr)
ES (1) ES2568430T3 (fr)
PL (1) PL2898144T3 (fr)
WO (1) WO2014202277A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013106327B4 (de) * 2013-06-18 2015-01-08 Andritz Technology And Asset Management Gmbh Papiermaschinensieb
DE102013108399B3 (de) * 2013-08-05 2014-11-27 ANDRITZ KUFFERATH GmbH Papiermaschinensieb, dessen laufseite querfäden mit unterschiedlicher flottierungslänge aufweist
EP3511455A4 (fr) 2016-09-06 2020-04-29 Nippon Filcon Co., Ltd Tissu industriel à deux couches
JP7199820B2 (ja) * 2018-03-30 2023-01-06 日本フイルコン株式会社 工業用二層織物
DE102021115275A1 (de) * 2021-06-14 2022-12-15 Voith Patent Gmbh Papiermaschinenbespannung und Verwendung einer solchen Bespannung

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DE4229828C2 (de) * 1992-09-07 1996-07-04 Kufferath Andreas Gmbh Papiermaschinensieb in Form eines Verbundgewebes
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Also Published As

Publication number Publication date
PL2898144T3 (pl) 2016-08-31
BR112015013393A2 (pt) 2017-07-11
JP2016503843A (ja) 2016-02-08
ES2568430T3 (es) 2016-04-29
BR112015013393B1 (pt) 2021-12-21
KR101631539B1 (ko) 2016-06-17
EP2898144B1 (fr) 2016-02-17
DE102013106327B4 (de) 2015-01-08
US9528223B2 (en) 2016-12-27
US20150337492A1 (en) 2015-11-26
US20170037572A1 (en) 2017-02-09
KR20150105964A (ko) 2015-09-18
US10060076B2 (en) 2018-08-28
DE102013106327A1 (de) 2014-12-18
JP5879467B2 (ja) 2016-03-08
CN105143549A (zh) 2015-12-09
WO2014202277A1 (fr) 2014-12-24

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