EP2236666A1 - Feutre de presse ayant une zone de jonction et étant doté d'une structure de support non tissée fabriquée à plat - Google Patents

Feutre de presse ayant une zone de jonction et étant doté d'une structure de support non tissée fabriquée à plat Download PDF

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Publication number
EP2236666A1
EP2236666A1 EP20100157263 EP10157263A EP2236666A1 EP 2236666 A1 EP2236666 A1 EP 2236666A1 EP 20100157263 EP20100157263 EP 20100157263 EP 10157263 A EP10157263 A EP 10157263A EP 2236666 A1 EP2236666 A1 EP 2236666A1
Authority
EP
European Patent Office
Prior art keywords
yarns
support structure
transverse
press felt
longitudinal
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
EP20100157263
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German (de)
English (en)
Other versions
EP2236666B1 (fr
Inventor
Uwe Köckritz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
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Voith Patent GmbH
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Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP2236666A1 publication Critical patent/EP2236666A1/fr
Application granted granted Critical
Publication of EP2236666B1 publication Critical patent/EP2236666B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/10—Seams thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/682—Needled nonwoven fabric

Definitions

  • the invention relates to a seamable press felt for a machine for producing and / or treating a fibrous web, such as a paper, board or tissue web, and a method for the production thereof.
  • Press felts usually consist of a tensile load-bearing support structure, which also provides substantially the dimensional stability of the press felt.
  • the carrier structures of today's seamable press felts are often woven round, with the machine direction yarns being woven back to form seam loops.
  • the disadvantage of woven structures is that the round weaving process is time-consuming and costly.
  • the warp yarns constitute the cross-machine direction yarns and the weft yarns the machine direction yarns, the length of such carrier structures is limited to the width of the weaving machines used in weaving.
  • the object is achieved by a press felt for a machine for producing and / or treating a fibrous web, in particular paper, board or tissue web.
  • the press felt has a carrier structure substantially affecting the dimensional stability of the felt.
  • the support structure comprises a flat fabric produced, which is formed from longitudinal yarns and these crossing transverse yarns and sewing threads, which connect the longitudinal and the transverse yarns at the intersection points.
  • the textile fabric of the press felt according to the invention is longer than the length of the support structure and deposited in such a manner on itself, that the support structure by several in each case over the entire length of the support structure extending layers of the textile fabric is formed.
  • the layers arranged on each other are at least partially connected to each other.
  • cover edges are formed which extend transversely to the longitudinal direction of the support structure and which define a one and another transverse end of the support structure.
  • the longitudinal yarns are curved to form seam loops at the two transverse ends of the support structure.
  • the support structure is seamable in a paper machine by guiding the two transverse ends of the support structure to make the support structure endless, and engaging the seam loops to form a connecting channel extending transversely of the support structure.
  • a pintle wire is passed through the connection channel of the support structure.
  • the inventive solution provides a press felt having a non-woven support structure having both longitudinal and transverse yarns.
  • the longitudinal yarns represent the elements that absorb at least the essential part of the tensile load acting on the press felt.
  • the transverse yarns determine at least the essential part of the transverse stability of the press felt. Since in the solution according to the invention the longitudinal yarns also provide the seam loops, those in the EP0261488 proposed wire helices in the seam area omitted. Since the press felt according to the invention has a support structure which comprises a non-woven textile fabric or even formed from this, it can be produced easily and quickly and thus inexpensively.
  • the solution according to the invention thus combines the advantages of the WO89 / 12717 and EP0261488 known solutions.
  • the self-deposited portions of the fabric may form two or more entire layers.
  • the support structure is two-ply, i. is formed by two in each case over the length of the support structure extending layers of the fabric, so for example, the two end portions of the flat fabric produced fabric may be stored on the center portion of the fabric, that they complement the center portion completely covering position.
  • the textile surface is about twice as long as the support structure and the press felt.
  • the support structure may also comprise three layers of the textile fabric or be formed by them.
  • the textile fabric can be divided into three sections of equal length, for example two end sections and one center section laid on top of each other, for example by covering one end section completely on one side of the center section and the other end section on the other side opposite the one side Side of the middle section completely covered.
  • the successive portions of the textile fabric are connected to each other by sewing and / or needling.
  • the sections may, for example, be interconnected by a needled nonwoven structure of staple fibers.
  • a preferred embodiment of the invention provides that one or more transverse yarns is respectively removed from the textile fabric in the region of the cover edges.
  • the textile fabric is preferably a warp knit structure or a leno fabric.
  • the support structure is formed only by the one warp knit structure or the leno fabric.
  • the longitudinal yarns in the support structure preferably extend straight down to the area of the seam loops. Furthermore, the transverse yarns preferably extend straight in the carrier structure.
  • the term "straight extension in the support structure" is to be understood in the present case that the yarns for providing the support structure do not extend in a curved manner, as is the case, for example, with a woven fabric.
  • the o.g. Definition is not intended to exclude that the yarns are curved when the support structure is curved, as is the case, for example, in the case of the support structure made endless.
  • the yarns extend mutually curved.
  • the advantage in the straight course of the longitudinal and / or transverse yarns is on the one hand that less yarn material is needed for the production of the textile fabric.
  • such structures are more dimensionally stable than a woven fabric, particularly when used as a press felt, because a structure constructed by straight yarns exhibits less distortion under force in the press nip than a fabric with curved yarns.
  • the longitudinal yarns are monofilament yarns, since in this case the pintle wire can be guided much easier through the connecting channel than if the longitudinal yarns are formed by multifilament yarns.
  • the monofilament yarns forming the longitudinal yarns are formed from or contain a polyamide and / or a polyamide copolymer.
  • the transverse yarns are multifilament yarns and / or staple fiber yarns.
  • the staple fibers of the nonwoven structure can be significantly better anchored than in monofilament yarns.
  • the multifilament yarns are formed from a plurality of monofilament yarns twisted together.
  • 4-ply threads, 6-ply threads, 9-ply threads, or 10-ply threads, to name but a few possible ply threads, are conceivable here.
  • the transverse yarns are spaced from each other, wherein the distance between adjacent transverse yarns corresponds at least to the diameter of the transverse yarns.
  • the layers of the textile fabric are preferably laid on each other such that transverse yarns of the one layer are arranged between adjacent transverse yarns of the other layer and vice versa. As a result, the thickness of two successive layers can be reduced. Furthermore, the successive layers are fixed to each other.
  • the longitudinal yarns are spaced apart from each other and the distance between adjacent longitudinal yarns corresponds at least to the diameter of the longitudinal yarns.
  • the layers of the textile fabric are preferably laid on each other such that longitudinal yarns of the one layer are arranged between adjacent longitudinal yarns of the other layer and vice versa.
  • the diameters of the transverse yarns are preferably adapted to the diameter of the plug-in wire.
  • a preferred embodiment of the invention therefore provides that the diameter of the transverse yarns substantially corresponds to the diameter of the plug-in wire.
  • the longitudinal yarns extend in the intended machine direction and the transverse yarns in the intended cross-machine direction of the press felt.
  • the method according to the invention may comprise the further step of removing one or more transverse yarns from the textile fabric in the region of the cover edges.
  • the method according to the invention may comprise the step of connecting the layers of the textile fabric forming the carrier structure to one another.
  • the layers it is possible for the layers to be connected to one another only along lines, as may be the case when the layers are stitched together, for example. It is also conceivable to connect the layers with one another in a planar manner, as may be the case, for example, when the layers are glued together.
  • the flat fabric has two transverse edges which limit the length of the fabric and two longitudinal edges which limit the width of the fabric. Furthermore, the textile fabric has an upper side and a lower side opposite thereto.
  • a tubular structure is produced from the textile fabric before step b).
  • the fabric in particular, for the fabric to be joined to itself in the region of its two transverse edges to form the tubular structure, by an end section of the fabric adjoining the one transverse edge projecting onto another end section of the textile fabric adjacent to the other transverse edge is filed.
  • the depositing takes place such that either the top of the one end portion is placed on top of the other end portion or the bottom of the one end portion is placed on the underside of the other end portion and the successive end portions are at least partially connected to each other.
  • the compound can in this case, for example.
  • a method take place, in which the material of the sheet, ie, the longitudinal threads and / or transverse threads and / or sewing threads, are at least partially connected by fusing in the region of the two end portions of the textile fabric.
  • step b) is carried out.
  • step c the seam loops are fixed.
  • the support structure formed from a plurality of layers of the fabric is guided around two parallel rollers, by means of which the support structure is tensioned in its longitudinal extent, whereby the seam loops are fixed in their course.
  • the fixation can be done in addition to the tensile stress under the influence of temperature.
  • the textile fabric forming the multilayer structure can also be guided through a press nip.
  • FIG. 1 shows an embodiment of a method according to the invention for producing a press felt according to the invention with a support structure 11, wherein the production of the support structure 11 comprises the steps described below.
  • a textile fabric 1 is provided.
  • the textile fabric 1 is formed from longitudinal yarns 2 and transverse yarns 3a, 3b, 3c, which intersect the longitudinal yarns 2.
  • the longitudinal yarns 2 are connected to the transverse yarns 3a, 3b, 3c at the intersection points by means of sewing threads 4.
  • the textile fabric 1 forms a single-layer warp knit structure.
  • the longitudinal yarns 2 are formed of a polyamide and monofilament yarns, whereas the transverse yarns 3a, 3b, 3c are formed as multifilament yarns.
  • the warp knit structure 1 is longer than the length of the support structure 11 to be produced. In the present case, the warp knit structure 1 is about twice as long as the support structure 11 to be produced.
  • the warp knit structure 1 has two end sections 5b, 5c and a center section 5a, the two end sections 5b, 5c together have approximately the length of the central portion 5a (see FIG. 1a ).
  • the transverse yarns of the one end portion 5b are designated by the reference numeral 3b and those of the other end portion 5c by the reference numeral 3c.
  • the transverse yarns 3a, 3b and 3c are spaced from each other, wherein the distance between adjacent transverse yarns 3a, 3b, 3c at least equal to the diameter of the transverse yarns 3a, 3b, 3c itself.
  • Middle section 5a filed that the support structure 11 is formed by a plurality of each extending over the entire length of the support structure 11 layers of the textile fabric 1.
  • the two end sections 5b, 5c together form a position of the support structure 11, as the center section 5a forms a position of the support structure 11.
  • envelope edges 6, 7 are formed, which extend transversely to the longitudinal direction of the support structure 11 and define a one and another transverse end of the support structure 11.
  • transverse yarns 3b, 3c can now be removed from the textile fabric 1 in the area of the cover edges 6, 7 prior to laying one on another or thereafter.
  • the longitudinal yarns 2 running in the region of the cover edges 6, 7 form the two transverse ends of the two yarns Carrier structure 11 each seam loops 8, 9, through which for endless making the support structure 11, a pintle 10 is feasible (see FIG. 1 d) ,
  • the successive layers of the textile fabric 1 are joined together. This can be done, for example, by sewing on the layers and / or during needling of a nonwoven structure made from staple fibers.
  • FIG. 2 shows a further embodiment of a method according to the invention for producing a press felt according to the invention with a support structure 11.
  • FIG. 2 described method adds from the FIG. 1 known methods, for example.
  • FIG. 2b added to the manufacturing step described in which from the textile fabric 1, before this in whole layers on itself is stored, from the textile fabric a tubular structure is made.
  • the textile fabric 1 has two transverse edges 18, 19 which limit the length of the textile fabric as well as an upper side 20 and a lower side 21 opposite thereto.
  • the textile fabric 1 is connected to itself in the region of its two transverse edges 18, 19.
  • one adjacent to the one transverse edge 18 one end portion 26 of the textile fabric 1 is deposited on a bordering to the other transverse edge 19 other end portion 27 of the textile fabric.
  • the depositing takes place here in such a way that the upper side 20 of the one end section 26 is deposited on the upper side 20 of the other end section 27.
  • the successive end portions 26, 27 are connected together in a connection region 24, for example by a hot wire device 23.
  • the connection region 24 extends in the illustration of FIG. 2 right of the designated by the reference numeral 22 separation point.
  • Parts of the end sections 26, 27 lying to the left of the dividing line 22 are separated from the textile fabric 1 when joined to the hot-wire device.
  • connection region 24 can subsequently be smoothed, for example, by means of ultrasound action.
  • the deposition of the tubular structure 25 is shown on itself.
  • a plurality of, in the present case two, layers 28, 29 of the textile fabric 1 extending over the entire length of the support structure 11 are formed.
  • the cover edges 6, 7 are formed, which is extend transversely to the longitudinal direction of the support structure 11 and define a one and another transverse end of the support structure 11.
  • transverse yarns 3 can be removed from the textile fabric 1 in the region of the cover edges 6, 7 prior to laying one on another or thereafter.
  • the longitudinal yarns 2 running in the region of the cover edges 6, 7 form seam loops 8, 9 at the two transverse ends of the support structure 11.
  • the successive layers 28, 29 of the tubular structure 25 can be connected to each other. This can be done, for example, by sewing the layers 28, 29.
  • the self-deposited tubular structure 25 is made endless for the further production of the support structure 11 by bringing together the seam loops 8, 9 of the two transverse ends to form a connection channel through which a pintle 10 is guided (see FIG. 2e ).
  • the self-contained tubular structure 25 is endless, it is guided around two mutually spaced and parallel aligned rollers 30, 31 whose distance from each other in direction L is variable, in particular enlargeable, so that the support structure 11 in its longitudinal extent, ie in Longitudinal direction of the longitudinal yarns, a tensile stress can be generated.
  • the seam loops 8, 9 can be fixed in their shape.
  • at least one of the rollers 30, 31 is heated, so that the fixing of the seam loops 8, 9 takes place under the action of tensile stress and temperature.
  • the carrier structure 11 is fed to a needling device 32, by means of which a nonwoven structure 33 comprising staple fibers is needled to the carrier structure 11.
  • the FIG. 2 shows a finished produced inventive press felt 12.
  • the press felt 12 has the from the FIGS. 1 and 2 known support structure 11 which is needled on its machine-side 13 with one or more machine-side nonwoven fabric layers 14 and on its side facing the fibrous web 15 with one or more paper-side nonwoven fabric layers 16.
  • the nonwoven fabric layers 14, 16 are severed in the region of the seam loops 8, 9 over their entire width (cross machine direction) and their entire thickness to the support structure 11, so that the press felt 12 according to the invention can be stitched in a paper, board or tissue machine by the two transverse ends of the support structure 11 for endlessly making the support structure 11 guided to each other and the seam loops 8, 9 with the formation of a transverse in the support structure 11 extending connecting channel 17 are engaged with each other and through the connecting channel 17 for connecting the seam loops 8, 9 of Carrier structure 11 of the pintle 10 is guided.
EP20100157263 2009-04-02 2010-03-23 Feutre de presse ayant une zone de jonction et étant doté d'une structure de support non tissée fabriquée à plat Not-in-force EP2236666B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200910002121 DE102009002121A1 (de) 2009-04-02 2009-04-02 Nahtbares Pressfilz mit flach hergestellter und nicht gewobener Trägerstruktur

Publications (2)

Publication Number Publication Date
EP2236666A1 true EP2236666A1 (fr) 2010-10-06
EP2236666B1 EP2236666B1 (fr) 2012-02-29

Family

ID=42244079

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100157263 Not-in-force EP2236666B1 (fr) 2009-04-02 2010-03-23 Feutre de presse ayant une zone de jonction et étant doté d'une structure de support non tissée fabriquée à plat

Country Status (5)

Country Link
US (1) US8388811B2 (fr)
EP (1) EP2236666B1 (fr)
CN (1) CN201952679U (fr)
AT (1) ATE547561T1 (fr)
DE (1) DE102009002121A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA036317B1 (ru) 2013-11-14 2020-10-26 Джиписипи Айпи Холдингз Элэлси Способ изготовления бумажного изделия и бумагоделательная машина
DE102014200502A1 (de) 2014-01-14 2015-07-16 Voith Patent Gmbh Nahtbare Bespannung mit flach hergestellter und nicht gewobener Trägerstruktur
DE202019102306U1 (de) * 2019-04-24 2019-07-25 Heimbach Gmbh Pressfilz mit einem Fadengelege und einem auf der Maschinenseite oder der Papierseite des Fadengeleges vorgesehenen Trägervlies

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948722A (en) 1973-07-28 1976-04-06 Scapa-Porritt Limited Warp knitted paper maker's felt and method for the production thereof
EP0261488A1 (fr) 1986-09-24 1988-03-30 Thomas Josef Heimbach GmbH & Co. Feutre pour papeterie et son procédé de fabrication
EP0290653A1 (fr) 1987-05-14 1988-11-17 Thomas Josef Heimbach GmbH & Co. Bande de matériaux
WO1989012717A1 (fr) 1988-06-17 1989-12-28 Scapa Group Plc Materiaux de fabrication de papier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19814473A1 (de) * 1998-04-01 1999-10-07 Heimbach Gmbh Thomas Josef Maschinenfilz sowie Verfahren zu dessen Herstellung
US7892402B2 (en) * 2007-10-05 2011-02-22 Albany International Corp. Flat woven full width on-machine-seamable fabric

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948722A (en) 1973-07-28 1976-04-06 Scapa-Porritt Limited Warp knitted paper maker's felt and method for the production thereof
EP0261488A1 (fr) 1986-09-24 1988-03-30 Thomas Josef Heimbach GmbH & Co. Feutre pour papeterie et son procédé de fabrication
EP0290653A1 (fr) 1987-05-14 1988-11-17 Thomas Josef Heimbach GmbH & Co. Bande de matériaux
WO1989012717A1 (fr) 1988-06-17 1989-12-28 Scapa Group Plc Materiaux de fabrication de papier

Also Published As

Publication number Publication date
US20100252219A1 (en) 2010-10-07
DE102009002121A1 (de) 2010-10-14
ATE547561T1 (de) 2012-03-15
EP2236666B1 (fr) 2012-02-29
US8388811B2 (en) 2013-03-05
CN201952679U (zh) 2011-08-31

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