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US20090293245A1 - Method for producing a felt belt - Google Patents

Method for producing a felt belt Download PDF

Info

Publication number
US20090293245A1
US20090293245A1 US12/473,638 US47363809A US2009293245A1 US 20090293245 A1 US20090293245 A1 US 20090293245A1 US 47363809 A US47363809 A US 47363809A US 2009293245 A1 US2009293245 A1 US 2009293245A1
Authority
US
United States
Prior art keywords
transverse reinforcement
longitudinal
longitudinal thread
woven fibrous
fibrous layer
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.)
Abandoned
Application number
US12/473,638
Other languages
English (en)
Inventor
Uwe Kockritz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE200810002033 external-priority patent/DE102008002033A1/de
Priority claimed from DE200910002151 external-priority patent/DE102009002151A1/de
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Assigned to VOITH PATENT GMBH reassignment VOITH PATENT GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KOCKRITZ, UWE, DR
Publication of US20090293245A1 publication Critical patent/US20090293245A1/en
Abandoned 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

Definitions

  • the present invention relates to a method for producing a felt belt, particularly a press felt, for a paper, cardboard, or tissue machine.
  • Felt belts in particular press felts for paper, cardboard, or tissue machines, generally have a base structure providing dimensional stability to the felt, which is needled on both sides with one or more non-woven fibrous layers.
  • Press felts may be provided either as continuous belts or as continuous belts with a seam. Press felts embodied as continuous belts have the disadvantage as compared to press felts with a seam that such press felts are difficult to install in the paper machine since they cannot be pulled into the machine as an open belt.
  • the base structure of the known press felts is woven. Woven structures have the disadvantage that they are often very complex to produce. Therefore, the prior art already proposes press felts with non-woven base structures in which the base structure has, for example, a longitudinal thread structure.
  • a longitudinal thread structure is known, for example, from U.S. Pat. No. 4,495,680.
  • Most of the press felts having longitudinal thread structures known up to now are embodied as continuous belts.
  • the method of the present invention includes the steps of first creating a helically wound longitudinal thread structure, applying a transverse reinforcement structure to the longitudinal thread structure and connecting it to the longitudinal thread structure only in a later step. In this manner, a tube-like composite structure is obtained. Subsequently, opposing sections of the tube-like composite structure are placed one atop the other such that the tube-like composite structure forms a flat structure whose length corresponds to approximately half the circumference of the tube-like structure and that provides seam loops on its opposite longitudinal ends formed by the at least one helically wound longitudinal thread. Then, the flat structure is made continuous in that the opposing seam loops are merged and connected to one another. The sections of the flat structure placed one atop the other are furthermore connected to one another in order to form a base structure.
  • multiple flat structures are produced that are placed in a row next to one another and connected to one another at the seam loops in order to form a continuous belt. This means that the flat structures placed one behind the other form a continuous belt together.
  • the thread(s) is/are helically wound, for example, around two rollers located at a distance from one another and oriented essentially parallel to one another, with the progression of the helical winding, i.e., the winding direction, occurring perpendicularly to the two rollers.
  • the length of a winding corresponds to the circumference of the tube-like composite structure.
  • the transverse reinforcement structure may be connected, directly or indirectly, for example, via an intermediate layer, to the longitudinal thread structure.
  • the one or more longitudinal thread(s) forming the longitudinal thread structure is/are embodied as monofilament thread(s).
  • a third embodiment of the method according to the present invention provides for the belt to be made continuous or for the formation of a continuous belt before the connection of the sections placed one atop the other.
  • the base structure is first made continuous before the layers and/or sections of the tube-like composite structure placed one atop the other are connected to one another and their position relative to one another is thus fixed, it is possible to correct, for example, discrepancies in length and warping in the flat structure.
  • the flat structure(s) may be tensed in its/their longitudinal direction after being made continuous. This may occur, for example, in that the flat structure that has been made continuous or the continuous belt is guided over a pair of rollers disposed at a distance from and parallel to one another and the distance between the rollers is increased in the longitudinal direction of the flat structure.
  • a fourth embodiment of the present invention proposes that the structure be made continuous or that a continuous belt be formed after the sections placed one atop the other have been connected.
  • a further development of the present invention provides for at least one carrier layer to be applied to the longitudinal thread structure after the production of the longitudinal thread structure and before the application of the transverse reinforcement structure.
  • the carrier layer may be applied to the longitudinal thread structure together with the transverse reinforcement structure.
  • the transverse reinforcement structure is, for example, first connected to the carrier layer before this arrangement is applied to the longitudinal thread structure and connected thereto. This may occur, for example, in order to fix the distance between sequential thread windings before applying the transverse reinforcement structure.
  • the transverse reinforcement structure for example, has no direct contact with the longitudinal thread structure; rather, the transverse reinforcement structure is connected to the longitudinal thread structure via the carrier layer.
  • a fifth embodiment of the present invention provides for the longitudinal thread structure and the transverse reinforcement structure to be connected to one another via the carrier layer.
  • the carrier layer can be disposed between the transverse reinforcement structure and the longitudinal thread structure.
  • the carrier layer may, for example, be formed alone or in combination by a non-woven fibrous layer or a film layer.
  • the carrier layer which is embodied as a non-woven fibrous layer, may comprise hot melt adhesive fibers.
  • the longitudinal thread structure be connected to the non-woven fibrous layer by the hot melt adhesive fibers being melted and resolidified and/or by the transverse reinforcement structure being connected to the non-woven fibrous layer by the hot melt adhesive fibers being melted and resolidified.
  • the non-woven fibrous layer Before melting the hot melt adhesive fibers of the non-woven fibrous layer, or as an alternative thereto, it is moreover conceivable for the non-woven fibrous layer to be needled to the longitudinal thread structure and/or to the transverse reinforcement structure.
  • the longitudinal thread structure and/or the transverse reinforcement structure can be at least partially embedded in the non-woven fibrous layer. This means that the connection between the thread structure and the carrier layer and/or between the transverse reinforcement layer and the carrier may occur by means of needling or melting. Alternatively or in addition, adhesion is also conceivable.
  • the longitudinal thread structure and the transverse reinforcement structure are connected to the non-woven fibrous layer comprising hot melt adhesive fibers by the hot melt adhesive fibers being melted and resolidified
  • the longitudinal thread structure, the transverse reinforcement structure, and the non-woven fibrous layer can be hot calendered together, for example, in that they are guided together around a heated roller.
  • the transverse reinforcement structure may comprise a transverse thread arrangement, which may be, for example, alone or in combination, a woven fabric, a knitted fabric, a knotted fabric, a gauze fabric, or a transverse thread structure.
  • the transverse thread structure is, for example, a woven or knitted fabric, it may include transverse threads and longitudinal threads that are relatively thin in comparison to the transverse threads, and which hold the transverse threads in position. However, the transverse threads may also be held in position by a film or fibrous non-woven layer upon which the transverse threads are fixed.
  • the transverse reinforcement structure In order to produce the base structure in a cost-effective manner, it is conceivable, for example, for the transverse reinforcement structure to be formed by multiple transverse reinforcement modules extending only over part of the length of the longitudinal thread structure, which are disposed one behind the other on the longitudinal thread structure in the longitudinal direction of the felt belt in order to form the transverse reinforcement structure.
  • the transverse reinforcement modules may extend over the width of the longitudinal thread structure.
  • the transverse reinforcement modules may be formed with a transverse reinforcement output strip such that the transverse reinforcement modules may be placed on the longitudinal thread structure as follows:
  • transverse reinforcement module output strip laterally placing the transverse reinforcement module output strip relative to the longitudinal thread structure, i.e., transverse to the longitudinal direction of the longitudinal thread structure;
  • each transverse reinforcement module placed on the longitudinal thread structure extends over the width of the longitudinal thread structure and the transverse reinforcement modules disposed lying one behind the other combine to measure the length of the longitudinal thread structure.
  • the production of the base structure is particularly cost effective when the transverse reinforcement module output strip is present as rolling stock and is unrolled from the roll when it is laterally placed.
  • a winding method is used such that a carrier layer extending over the entire width of the felt belt may be produced by the helical winding of a partial-width carrier strip.
  • the carrier layer provides for the carrier layer to be produced in that a carrier strip extending only over part of the provided width of the felt belt is helically wound in a continuous fashion in the direction of the provided width of the felt belt, particularly up to the provided width of the felt belt. If the carrier strip is helically wound, depending on the present requirements, for example, whether the carrier layer is to be embodied in single or multiple layers, edges facing one another may be placed flush or in a regionally overlapping manner.
  • the base structure After the production of the base structure, it may be placed under tension and subjected to a heat treatment in order to attain a high level of dimensional stability.
  • the seam loops that have been merged, or are to be connected to one another, are connected by a fixing wire.
  • the base structure may be needled on its top side to at least one non-woven fibrous layer and/or on its bottom side to at least one non-woven fibrous layer.
  • the outermost of the non-woven fibrous layers on the top side of the base structure provides the paper side of the felt belt.
  • the outermost of the non-woven fibrous layers on the bottom side of the base structure provides the machine side of the felt belt.
  • the transverse reinforcement structure in order to achieve a good connection of the one or more non-woven fibrous layer(s) to the base structure, another embodiment of the present invention provides for the transverse reinforcement structure to include multifilament threads.
  • the multifilament threads may particularly be twisted.
  • the transverse threads of the transverse reinforcement structure are embodied as multifilament threads.
  • the embodiment described above may also provide for the longitudinal thread(s) of the longitudinal thread structure being embodied as monofilament thread(s).
  • particulate polymer material may be incorporated into at least one non-woven fibrous layer that is needled onto the top side and/or the bottom side of the base structure, said polymer material attaching to fibers of the non-woven fibrous layer and forming a porous composite structure therewith.
  • the particulate polymer material it is conceivable, for example, for the particulate polymer material to be melted after its incorporation into the non-woven fibrous layer and, after it resolidifies, to form the porous composite structure along with the fibers of the non-woven fibrous layer.
  • FIGS. 1 a - 1 e illustrate a first embodiment of a method according to the present invention
  • FIG. 2 illustrates a second embodiment of a method according to the present invention
  • FIG. 3 illustrates a variant of the application and connection of a transverse reinforcement structure on a longitudinal thread structure.
  • FIGS. 1 a - 1 e there is shown a first embodiment of a method according to the present invention for producing the base structure of a press felt.
  • FIG. 1 a illustrates the production of longitudinal thread structure 1 of the base structure.
  • skein of threads 2 parallel to one another are helically wound around two rollers 3 , 4 disposed at a distance from and essentially parallel to one another, with the progression of the helical winding, i.e., the winding direction, occurring perpendicularly to the two rollers in the direction of the provided width (CMD) of the felt belt up to the provided width of the felt belt.
  • the length of one winding corresponds to the circumference of thread structure 1 thus formed.
  • carrier layer 5 embodied as a non-woven fibrous layer is applied to thread structure 1 ; the carrier layer may subsequently be needled, for example, to the thread structure.
  • Non-woven fibrous layer 5 includes hot melt adhesive fibers and extends over the length and width of thread structure 1 .
  • the status of the method of the present invention shown in FIG. 1 c includes the steps of applying a transverse reinforcement structure embodied as transverse thread structure 6 to longitudinal thread structure 1 , which has already been provided with non-woven fibrous layer 5 , and connecting the same to longitudinal thread structure 1 in order to form tube-like composite structure 7 .
  • the connection of transverse reinforcement structure 6 to longitudinal thread structure 1 is facilitated by non-woven fibrous layer 5 .
  • Composite structure 10 thus obtained has the structure of a tube.
  • the needling allows longitudinal thread structure 1 and/or transverse thread structure 6 to at least partially, for example, completely, be embedded in non-woven fibrous layer 5 .
  • opposing sections 11 , 12 of tube-like structure 10 are placed one atop the other such that tube-like structure 10 forms flat structure 13 whose length corresponds to approximately half of the circumference of tube-like structure 10 and which has seam loops 16 , 17 on opposing longitudinal ends 14 , 15 that are provided by helically wound longitudinal threads 2 .
  • FIG. 1 e illustrates the steps of flat structure 13 being made continuous by combining opposing seam loops 16 , 17 and connecting the same to one another by means of fixing wire 18 and connecting sections 11 , 12 of flat structure 13 placed one atop the other to form base structure 19 .
  • the connection of sections 11 , 12 of flat structure 13 placed one atop the other occurs by needling, for example, by means of needle arrangement 20 .
  • the structure is made continuous before the connection of sections placed one atop the other.
  • flat structure 13 is tensed in its longitudinal direction MD.
  • FIG. 2 illustrates base structure 19 ′ that is formed by a plurality of flat structures 13 a - 13 i disposed in a row next to one another and connected by means of fixing wires 18 a - 18 i on merged seam loops 16 a, 17 b.
  • FIG. 3 illustrates a variant of the application and connection of a transverse reinforcement structure on a longitudinal thread structure.
  • longitudinal thread structure 23 having a length and a width.
  • Non-woven fibrous layer 24 is deposited on longitudinal thread structure 23 that extends over the length and width of the longitudinal thread structure and that is needled with longitudinal thread structure 23 to form longitudinal reinforcement module 33 such that the longitudinal thread structure is disposed inside non-woven fibrous layer 24 .
  • transverse reinforcement module output strip 25 is provided, having a length and a width, which is wound onto roll 26 and is present as rolling stock.
  • Transverse reinforcement module output strip 25 is laterally placed relative to longitudinal reinforcement module 33 in that respective free end 27 of transverse reinforcement module output strip 25 is guided from one longitudinal edge 28 of longitudinal reinforcement module 33 to the other longitudinal edge 29 of longitudinal reinforcement module 33 (see arrow).
  • transverse reinforcement module output strip 25 is deposited on longitudinal reinforcement module 33 . After being deposited, the section of transverse reinforcement module output strip 25 placed on longitudinal reinforcement module 33 is separated from remaining transverse reinforcement module output strip 25 , forming transverse reinforcement module 30 a, 30 b.
  • transverse reinforcement module output strip 25 to be placed on longitudinal reinforcement module 33 may already be separated from remaining transverse reinforcement module output strip 25 during the deposition of transverse reinforcement module output strip 25 onto longitudinal reinforcement module 33 in order to form transverse reinforcement module 30 a, 30 b.
  • transverse reinforcement modules 30 a, 30 b are cut such that their length corresponds to the width of longitudinal reinforcement module 33 .
  • transverse reinforcement module 30 a has already been deposited onto non-woven fibrous layer 24 according to the method of the present invention described above while, at the moment shown in the depiction, transverse reinforcement module output strip 25 is being laterally placed relative to longitudinal reinforcement module 33 and deposited thereon and, once deposition has occurred (not shown), is cut such that transverse reinforcement module 30 b extends over the width of longitudinal reinforcement module 33 .
  • transverse reinforcement module 30 a After the deposition of transverse reinforcement module 30 a onto longitudinal reinforcement module 33 , longitudinal reinforcement module 33 is moved in its longitudinal direction MD on a path relative to transverse reinforcement module output strip 25 that essentially corresponds to the width of transverse reinforcement module output strip 25 .
  • transverse reinforcement modules 30 a , 30 b , . . . are disposed lying one after the other in the longitudinal direction of the felt belt.
  • each transverse reinforcement module 30 a , 30 b deposited on longitudinal reinforcement module 33 extends over the width of longitudinal reinforcement module 33 and transverse reinforcement modules 30 a , 30 b disposed lying one after the other are expanded by additional transverse reinforcement modules, which are not shown here, to form an uninterrupted layer.
  • transverse reinforcement modules 30 a , 30 b , . . . are connected to non-woven fibrous layer 24 and longitudinal thread structure 23 in that longitudinal thread structure 23 , non-woven fibrous layer 24 , and transverse reinforcement module(s) 30 a , 30 b , . . . disposed thereon are subjected together to the effects of heat under pressure, in that they are guided around heated roller 32 .
  • transverse reinforcement modules 30 a , 30 b , non-woven fibrous layer 24 , and longitudinal thread structure 23 are pressed with one another, which ensures a good bond.

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  • Nonwoven Fabrics (AREA)
US12/473,638 2008-05-28 2009-05-28 Method for producing a felt belt Abandoned US20090293245A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DEDE102008002033.8 2008-05-28
DE200810002033 DE102008002033A1 (de) 2008-05-28 2008-05-28 Verfahren zur Herstellung eines Filzbandes
DE200910002151 DE102009002151A1 (de) 2009-04-02 2009-04-02 Verfahren zur Herstellung eines Filzbandes
DEDE10200900251.5 2009-04-02

Publications (1)

Publication Number Publication Date
US20090293245A1 true US20090293245A1 (en) 2009-12-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
US12/473,638 Abandoned US20090293245A1 (en) 2008-05-28 2009-05-28 Method for producing a felt belt

Country Status (2)

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US (1) US20090293245A1 (de)
EP (1) EP2128335B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102851873A (zh) * 2012-08-28 2013-01-02 常州市第八纺织机械有限公司 一种缝编机满幅托布装置
WO2017026916A1 (ru) * 2015-08-12 2017-02-16 Борис Федорович СВЕТЛОВ Ленточная ролл-машина для валяния войлока
US9765481B2 (en) 2013-08-23 2017-09-19 Voith Patent Gmbh Fabric and method for producing same
CN105358763B (zh) * 2013-06-21 2018-04-06 福伊特专利有限公司 绷网及其制造方法
WO2019152088A1 (en) 2018-02-02 2019-08-08 Astenjohnson International,Inc. Non-woven backing for press felt, method for producing non-woven backing, and press felt
CN114867910A (zh) * 2019-12-18 2022-08-05 福伊特专利有限公司 造纸机网毯

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103625996B (zh) * 2012-08-24 2016-02-10 上海金熊造纸网毯有限公司 基底织物制备装置

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US4495680A (en) * 1982-02-17 1985-01-29 Appleton Mills Method and apparatus for forming a helical wound substrate composed solely of longitudinal yarns
US4911683A (en) * 1988-08-03 1990-03-27 The Draper Felt Company, Inc. Seam for work fabric and method of manufacture thereof
US20070163667A1 (en) * 2006-01-17 2007-07-19 Voith Paper Gmbh Seam press fabric
US20070163741A1 (en) * 2006-01-17 2007-07-19 Voith Paper Gmbh Modified seam press fabric
US20070235155A1 (en) * 2006-03-21 2007-10-11 Walter Best Method for manufacturing a felt belt, and felt belt
US20070254546A1 (en) * 2006-04-26 2007-11-01 Astenjohnson, Inc. Nonwoven textile assembly, method of manufacture, and spirally wound press felt comprised of same
US8123911B2 (en) * 2008-04-01 2012-02-28 Voith Patent Gmbh Press felt and method for its production

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US3097413A (en) * 1960-05-26 1963-07-16 Draper Brothers Company Unwoven papermaker's felt
US5015220A (en) * 1988-08-03 1991-05-14 Tamfelt, Inc. Seam for work fabric and method of manufacture thereof
DE19814473A1 (de) * 1998-04-01 1999-10-07 Heimbach Gmbh Thomas Josef Maschinenfilz sowie Verfahren zu dessen Herstellung
US6240608B1 (en) * 1999-04-12 2001-06-05 Albany International Corp. Method for joining nonwoven mesh products
US6491794B2 (en) * 2001-03-29 2002-12-10 Albany International Corp. Base structure for seamed papermaker's fabrics
GB0306769D0 (en) * 2003-03-25 2003-04-30 Voith Fabrics Heidenheim Gmbh Composite press felt
EP2067896B1 (de) * 2007-12-04 2011-04-27 Heimbach GmbH & Co.KG Verfahren zur Herstellung eines Maschinenfilzes sowie Maschinenfilz

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4495680A (en) * 1982-02-17 1985-01-29 Appleton Mills Method and apparatus for forming a helical wound substrate composed solely of longitudinal yarns
US4911683A (en) * 1988-08-03 1990-03-27 The Draper Felt Company, Inc. Seam for work fabric and method of manufacture thereof
US20070163667A1 (en) * 2006-01-17 2007-07-19 Voith Paper Gmbh Seam press fabric
US20070163741A1 (en) * 2006-01-17 2007-07-19 Voith Paper Gmbh Modified seam press fabric
US20070235155A1 (en) * 2006-03-21 2007-10-11 Walter Best Method for manufacturing a felt belt, and felt belt
US20070254546A1 (en) * 2006-04-26 2007-11-01 Astenjohnson, Inc. Nonwoven textile assembly, method of manufacture, and spirally wound press felt comprised of same
US8123911B2 (en) * 2008-04-01 2012-02-28 Voith Patent Gmbh Press felt and method for its production

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102851873A (zh) * 2012-08-28 2013-01-02 常州市第八纺织机械有限公司 一种缝编机满幅托布装置
CN105358763B (zh) * 2013-06-21 2018-04-06 福伊特专利有限公司 绷网及其制造方法
US9957666B2 (en) 2013-06-21 2018-05-01 Voith Patent Gmbh Clothing and method for the production thereof
US9765481B2 (en) 2013-08-23 2017-09-19 Voith Patent Gmbh Fabric and method for producing same
WO2017026916A1 (ru) * 2015-08-12 2017-02-16 Борис Федорович СВЕТЛОВ Ленточная ролл-машина для валяния войлока
WO2019152088A1 (en) 2018-02-02 2019-08-08 Astenjohnson International,Inc. Non-woven backing for press felt, method for producing non-woven backing, and press felt
EP3746291A4 (de) * 2018-02-02 2021-10-27 Astenjohnson International, Inc. Nichtgewebte unterlage für pressfilz, verfahren zur herstellung einer nichtgewebten unterlage und pressfilz
US11492754B2 (en) 2018-02-02 2022-11-08 Astenjohnson, Inc. Non-woven backing for press felt, method for producing non-woven backing, and press felt
CN114867910A (zh) * 2019-12-18 2022-08-05 福伊特专利有限公司 造纸机网毯

Also Published As

Publication number Publication date
EP2128335B1 (de) 2013-03-27
EP2128335A1 (de) 2009-12-02

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