EP0544167A1 - Papermaking fabric, in particular dryer felt - Google Patents

Papermaking fabric, in particular dryer felt Download PDF

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Publication number
EP0544167A1
EP0544167A1 EP92119517A EP92119517A EP0544167A1 EP 0544167 A1 EP0544167 A1 EP 0544167A1 EP 92119517 A EP92119517 A EP 92119517A EP 92119517 A EP92119517 A EP 92119517A EP 0544167 A1 EP0544167 A1 EP 0544167A1
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EP
European Patent Office
Prior art keywords
paper machine
section
cross
machine clothing
multifilaments
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
EP92119517A
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German (de)
French (fr)
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EP0544167B1 (en
Inventor
Walter Halterbeck
Martin Hüser
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.)
Heimbach GmbH and Co KG
Original Assignee
Thomas Josef Heimbach and Co GmbH
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Publication of EP0544167A1 publication Critical patent/EP0544167A1/en
Application granted granted Critical
Publication of EP0544167B1 publication Critical patent/EP0544167B1/en
Anticipated expiration legal-status Critical
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    • 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/30—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments
    • D03D15/37—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the fibres or filaments with specific cross-section or surface shape
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/04—Heat-responsive characteristics
    • D10B2401/041—Heat-responsive characteristics thermoplastic; thermosetting
    • 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.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • 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.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • Y10T442/3073—Strand material is core-spun [not sheath-core bicomponent strand]
    • 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.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • Y10T442/3089—Cross-sectional configuration of strand material is specified
    • Y10T442/3106—Hollow strand material
    • 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.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3065—Including strand which is of specific structural definition
    • Y10T442/3089—Cross-sectional configuration of strand material is specified
    • Y10T442/3114—Cross-sectional configuration of the strand material is other than circular
    • 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.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3707—Woven fabric including a nonwoven fabric layer other than paper
    • Y10T442/3724—Needled
    • 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.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/425—Including strand which is of specific structural definition
    • 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.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/425—Including strand which is of specific structural definition
    • Y10T442/431—Cross-sectional configuration of strand material is specified
    • 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.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/494—Including a nonwoven fabric layer other than paper
    • 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]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/609—Cross-sectional configuration of strand or fiber material is specified
    • 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]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/609—Cross-sectional configuration of strand or fiber material is specified
    • Y10T442/611—Cross-sectional configuration of strand or fiber material is other than circular
    • 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]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/609—Cross-sectional configuration of strand or fiber material is specified
    • Y10T442/612—Hollow strand or fiber material
    • 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 paper machine clothing, in particular dryer fabric, with or consisting of a textile fabric, for. B. a fabric, knitted fabric, scrim or the like, which has flattened threads in cross section, the longer axis of the cross section of these threads extending parallel to the plane of the paper machine clothing.
  • Paper machine clothing is textile webs of very great length and considerable width, which are used for the formation and guidance as well as the transport of the paper web through the individual parts of the paper machine, essentially the sheet formation section, the press section and the dryer section.
  • fabrics are used as textile fabrics for the material web, the fabric structure of which is specially adapted to the respective requirements in the individual batches of the paper machine.
  • these fabrics are also covered with needled fleece on one or both sides and needled to obtain felt-like surfaces.
  • other flat structures can also be used, for example warp knitted fabrics or scrims.
  • Monofilaments or multifilaments consisting of individual fibers are used for the flat structure of paper machine clothing.
  • Thermoplastic polymers in particular polyamides, polyesters or the like, are practically without exception suitable as materials for this.
  • the monofilaments or the individual fibers of the multifilaments are solid and have a diameter of 0.1 mm and above.
  • the cross section is usually circular.
  • the use of flattened threads has considerable advantages, particularly when used as a dryer fabric.
  • the dryer fabric can be made thinner, which results in better heat transfer from the heating rollers to the paper web.
  • the material density inside the dryer fabric is greater than when using circular threads, which reduces the air permeability.
  • An excessively high air permeability has the consequence that considerable air movements take place through the dryer fabric, which can lead to fluttering of the dryer fabric.
  • the invention is therefore based on the object to design a paper machine clothing of the type mentioned so that it is ensured that the flattened threads are always oriented so that the longer axis of the thread cross section extends parallel to the plane of the paper machine clothing.
  • the invention further relates to a method for producing such a paper machine clothing.
  • the flattened threads consist of monofilaments which are annular in cross section and / or of multifilaments which are formed from individual fibers which are annular in cross section, the monofilaments or individual fibers of the multifilaments which are annular in cross section at least in the areas in which they run essentially parallel to the plane of the paper machine clothing, are plastically deformed to the flattened cross section.
  • Such a paper machine clothing can be produced according to the invention in such a way that hollow monofilaments and / or multifilaments with hollow fibers in cross section are used for the flat structure in cross section and that the flat structure provided therewith or consisting thereof is subjected to such pressure and heat treatment that the Monofilaments or multifilaments are plastically deformed to the flattened cross-section at least in the areas in which they run essentially parallel to the plane of the paper machine clothing.
  • the formation of Fabric initially uses hollow monofilaments and / or multifilaments with hollow individual fibers, so that it does not matter in which orientation they are introduced or integrated into the fabric.
  • the deformation to a flattened cross-section then takes place by a pressure and heat treatment, for example by calendering, in that the finished thread system is passed between one or other pairs of heated rolls.
  • a pressure and heat treatment for example by calendering
  • the hollow monofilaments or the multifilaments with hollow individual fibers are plastically deformed and in this way obtain a flattened cross section. Normal machines can therefore be used for the production of the fabric.
  • hollow fibers as carriers for a treatment liquid in paper machine clothing (EP-A1 0 ⁇ 191 231).
  • This treatment liquid escapes through openings, for example at the end of the fibers, during operation of the paper machine clothing, in particular in order to achieve a cleaning effect.
  • the fibers are parts of spun yarns, multifilaments or needled nonwovens.
  • the monofilaments or fibers of the multifilaments which are ring-shaped in cross-section, are deformed in such a way that their inner sides abut one another, ie. H. are flattened as much as possible in order to achieve the thinnest possible thread system.
  • the paper machine clothing consists of the textile fabric, use as a dryer fabric is particularly suitable.
  • the invention can also be used for all other types of paper machine clothing. If the paper machine clothing is intended as a press felt, there is the possibility of needling the textile fabric with the flattened threads on one or both sides in a manner known per se with a nonwoven fabric, so that the covering is given a felt-like surface on one or both sides.
  • the ring-shaped monofilaments or multifilaments with ring-shaped individual fibers deformed according to the invention can in principle be introduced into the thread system both in the longitudinal and in the transverse direction.
  • Cross-sectionally round threads can then be used for the longitudinal direction.
  • solid flat wires can also be used, since warp threads can be kept twist-free more easily than weft threads in a weaving machine.
  • the paper machine clothing has or consists of a fabric formed as a fabric
  • the fabric has the same weave on both sides, that is to say it is symmetrical in this respect.
  • An advantageous further development of the method according to the invention consists in using hollow monofilaments and / or hollow fibers for the multifilaments as starting material for the flat structure, which have circular cross sections on the outside and inside before they are plastically deformed. The orientation in which they are introduced into the thread system is then irrelevant.
  • hollow monofilaments or hollow individual fibers should also be used for the multifilaments, which have a free cross-sectional area that is between 20 and 80%, preferably 40 to 60% of the total cross-sectional area.
  • a free cross-sectional area that is between 20 and 80%, preferably 40 to 60% of the total cross-sectional area.
  • the dryer fabric (1) shown in the figures is intended for the dryer section of a paper machine. It consists of a fabric (2), which is only shown here as an example in plain weave, with itself in the transverse direction, i.e. H. transverse threads (3, 4, 5) extending transversely to the intended running direction of the drying wire (1) and longitudinal threads (6, 7, 8, 9) extending along the running direction.
  • a fabric (2) which is only shown here as an example in plain weave, with itself in the transverse direction, i.e. H. transverse threads (3, 4, 5) extending transversely to the intended running direction of the drying wire (1) and longitudinal threads (6, 7, 8, 9) extending along the running direction.
  • the transverse threads (3, 4, 5) run relatively straight through the body of the fabric (2) and are designed as solid monofilaments.
  • the longitudinal threads (6, 7, 8, 9) are annular in cross-section during the manufacture of the fabric (2) Hollow monofilaments have been used, as can be seen in particular from Figures (2) and (3).
  • the longitudinal threads (6, 7, 8, 9) initially have a circular cross section on the inside and outside and tie in the cross threads (3, 4, 5).
  • the fabric (2) is subjected to a calendering treatment by passing it between pairs of calendering rollers pressed against one another, which calendering treatment can also be carried out several times. Due to this calendering treatment, the flat sides of the fabric (2) are subjected to a simultaneous pressure and heat treatment.
  • the longitudinal threads (6, 7, 8, 9) designed as hollow monofilaments are flattened, that is to say they assume an almost rectangular cross section, the inside of the longitudinal threads (6, 7, 8, 9) coming to lie on top of one another, such as this is particularly clear from Figures (5) and (6).
  • the thickness of the drying wire (1) is considerably reduced due to the flattening of the longitudinal threads (6, 7, 8, 9).
  • the thickness could be reduced even further by using hollow monofilaments for the transverse threads (3, 4, 5).

Abstract

A paper machine cover with a textile web structure, e.g., a woven, knitted, or non-woven fabric, etc., is provided. The paper machine cover has flattened threads, whereby respectively the longer axis of the cross-section of these threads extends parallel to the plane of the paper machine cover. The flattened threads consist of monofilaments with an annular cross-section and/or multifilaments formed of individual filaments with an annular cross-section. The monofilaments or individual filaments of the multifilaments have an annular cross-section. These filaments are deformed plastically into the flattened cross-section at least in those areas where they extend parallel to the plane of the paper machine cover.

Description

Die Erfindung betrifft eine Papiermaschinenbespannung, insbesondere Trockensieb, mit oder bestehend aus einem textilen Flächengebilde, z. B. einem Gewebe, Gewirke, Gelege oder dergleichen, das im Querschnitt abgeflachte Fäden aufweist, wobei sich jeweils die längere Achse des Querschnitts dieser Fäden parallel zur Ebene der Papiermaschinenbespannung erstreckt.The invention relates to a paper machine clothing, in particular dryer fabric, with or consisting of a textile fabric, for. B. a fabric, knitted fabric, scrim or the like, which has flattened threads in cross section, the longer axis of the cross section of these threads extending parallel to the plane of the paper machine clothing.

Papiermaschinenbespannungen sind textile Materialbahnen sehr großer Länge und erheblicher Breite, die der Ausbildung und Führung sowie dem Transport der Papierbahn durch die einzelnen Partien der Papiermaschine dienen, und zwar im wesentlichen der Blattbildungspartie, der Pressenpartie und Trockenpartie. Dabei kommen als textile Flächengebilde für die Materialbahn vornehmlich Gewebe zum Einsatz, die in ihrem Gewebeaufbau den jeweiligen Anforderungen in den einzelnen Partien der Papiermaschine speziell angepaßt sind. Teilweise werden diese Gewebe auch mit Faservliesen ein- und beidseitig belegt und vernadelt, um filzartige Oberflächen zu erhalten. Anstatt eines Gewebes können auch andere Flächengebilde verwendet werden, beispielsweise Kettengewirke oder Fadengelege.Paper machine clothing is textile webs of very great length and considerable width, which are used for the formation and guidance as well as the transport of the paper web through the individual parts of the paper machine, essentially the sheet formation section, the press section and the dryer section. In this case, primarily fabrics are used as textile fabrics for the material web, the fabric structure of which is specially adapted to the respective requirements in the individual batches of the paper machine. In some cases, these fabrics are also covered with needled fleece on one or both sides and needled to obtain felt-like surfaces. Instead of a woven fabric, other flat structures can also be used, for example warp knitted fabrics or scrims.

Für das Flächengebilde einer Papiermaschinenbespannung werden Monofilamente oder aus Einzelfasern bestehende Multifilamente verwendet. Als Material kommen hierfür praktisch ausnahmslos thermoplastische Polymere, insbesondere Polyamide, Polyester oder dergleichen, in Frage. In der Regel sind die Monofilamente bzw. die Einzelfasern der Multifilamente massiv und haben einen Durchmesser von 0̸,1 mm und darüber. Der Querschnitt ist meist kreisrund.Monofilaments or multifilaments consisting of individual fibers are used for the flat structure of paper machine clothing. Thermoplastic polymers, in particular polyamides, polyesters or the like, are practically without exception suitable as materials for this. As a rule, the monofilaments or the individual fibers of the multifilaments are solid and have a diameter of 0.1 mm and above. The cross section is usually circular.

Im Stand der Technik sind jedoch auch Papiermaschinenbespannungen mit einem Flächengebilde bekannt, das nicht kreisrunde Fäden enthält (US-PS 3 858 623). Dabei hat es sich für den Einsatz insbesondere in der Trockenpartie einer Papiermaschine als günstig erwiesen, abgeflachte Fäden zu verwenden, deren längere Querschnittsachse sich parallel zur Ebene der Papiermaschinenbespannung erstreckt. Vornehmlich wurde vorgeschlagen, nur die sich in Laufrichtung der Papiermaschinenbespannung erstreckenden Längsfäden abgeflacht auszubilden (vgl. z. B. US-PS 2 0̸0̸3 123, US-PS 3 139 119, US-PS 3 545 70̸5, US-PS 3 632 0̸68, US-PS 4 142 557, DE-OS 28 47 327, US-PS 4 351 874, GB-OS 2 0̸97 435). Es sind aber auch Papiermaschinenbespannungen bekannt, bei denen Längs- und Querfäden aus Flachdrähten bestehen, beispielsweise bei Metallfadengelegen (US-PS 3 164 514, US-PS 3 30̸9 265), aber auch bei Metallgeweben (US-PS 3 346 465). Entsprechendes ist auch bei Geweben aus Kunststoffäden bekannt (GB-PS 980̸ 288).In the prior art, however, paper machine clothing with a flat structure that does not contain circular threads is known (US Pat. No. 3,858,623). It has proven to be advantageous for use in the dryer section of a paper machine in particular to use flattened threads whose longer cross-sectional axis extends parallel to the plane of the paper machine clothing. It has primarily been proposed that only the longitudinal threads extending in the running direction of the paper machine clothing be flattened (cf., for example, US Pat. No. 2 0̸0 1233 123, US Pat. No. 3 139 119, US Pat. No. 3 545 70̸5, US Pat. No. 3 632 0̸68, US-PS 4 142 557, DE-OS 28 47 327, US-PS 4 351 874, GB-OS 2 0̸97 435). But there are also known paper machine clothing, in which the longitudinal and transverse threads consist of flat wires, for example in metal thread lying (US Pat. No. 3,164,514, US Pat. No. 3,309,265), but also in metal fabrics (US Pat. No. 3,346,465). The same is known for fabrics made of plastic threads (GB-PS 980-288).

Die Verwendung von abgeflachten Fäden hat insbesondere bei der Verwendung als Trockensieb erhebliche Vorteile. Das Trockensieb kann mit einer geringeren Dicke ausgeführt werden, was eine bessere Wärmeübertragung von den Heizwalzen auf die Papierbahn zur Folge hat. Außerdem ist die Materialdichte innerhalb des Trockensiebs größer als bei Verwendung kreisrunder Fäden, wodurch die Luftdurchlässigkeit verringert wird. Eine zu hohe Luftdurchlässigkeit hat nämlich zur Folge, daß erhebliche Luftbewegungen durch das Trockensieb stattfinden, die zu einem Flattern des Trockensiebes führen können.The use of flattened threads has considerable advantages, particularly when used as a dryer fabric. The dryer fabric can be made thinner, which results in better heat transfer from the heating rollers to the paper web. In addition, the material density inside the dryer fabric is greater than when using circular threads, which reduces the air permeability. An excessively high air permeability has the consequence that considerable air movements take place through the dryer fabric, which can lead to fluttering of the dryer fabric.

Die Herstellung von Papiermaschinenbespannungen mit Fadensystemen, die abgeflachte Fäden enthalten, bereitet Schwierigkeiten, da die Fäden sich dabei nicht verdrillen dürfen. Die Gefahr der Verdrillung ist insbesondere bei Schußfäden gegeben. Im Stand der Technik sind keine brauchbaren Vorschläge bekannt, wie die Verdrillung der Fäden verhindert werden kann.The production of paper machine clothing with thread systems that contain flattened threads is difficult because the threads do not twist allowed to. The risk of twisting is particularly evident with weft threads. No useful proposals are known in the prior art on how the twisting of the threads can be prevented.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine Papiermaschinenbespannung der eingangs genannten Art so zu gestalten, daß gesichert ist, daß die abgeflachten Fäden immer so orientiert sind, daß sich die jeweils längere Achse des Fadenquerschnitts parallel zur Ebene der Papiermaschinenbespannung erstreckt. Gegenstand der Erfindung ist ferner ein Verfahren zur Herstellung einer solchen Papiermaschinenbespannung.The invention is therefore based on the object to design a paper machine clothing of the type mentioned so that it is ensured that the flattened threads are always oriented so that the longer axis of the thread cross section extends parallel to the plane of the paper machine clothing. The invention further relates to a method for producing such a paper machine clothing.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die abgeflachten Fäden aus im Querschnitt ringförmigen Monofilamenten und/oder aus Multifilamente, die aus im Querschnitt ringförmigen Einzelfasern gebildet sind, bestehen, wobei die im Querschnitt ringförmigen Monofilamente bzw. Einzelfasern der Multifilamente wenigstens in den Bereichen, in denen sie im wesentlichen parallel zur Ebene der Papiermaschinenbespannung verlaufen, plastisch zu dem abgeflachten Querschnitt verformt sind.This object is achieved according to the invention in that the flattened threads consist of monofilaments which are annular in cross section and / or of multifilaments which are formed from individual fibers which are annular in cross section, the monofilaments or individual fibers of the multifilaments which are annular in cross section at least in the areas in which they run essentially parallel to the plane of the paper machine clothing, are plastically deformed to the flattened cross section.

Eine solche Papiermaschinenbespannung kann erfindungsgemäß in der Weise hergestellt werden, daß für das Flächengebilde im Querschnitt hohle Monofilamente und/oder Multifilamente mit im Querschnitt hohlen Einzelfasern verwendet werden und daß das damit versehene oder daraus bestehende Flächengebilde einer solchen Druck- und Hitzebehandlung ausgesetzt wird, daß die Mono- bzw. Multifilamente wenigstens in den Bereichen, in denen sie im wesentlichen parallel zur Ebene der Papiermaschinenbespannung verlaufen, plastisch zu den abgeflachten Querschnitt verformt werden.Such a paper machine clothing can be produced according to the invention in such a way that hollow monofilaments and / or multifilaments with hollow fibers in cross section are used for the flat structure in cross section and that the flat structure provided therewith or consisting thereof is subjected to such pressure and heat treatment that the Monofilaments or multifilaments are plastically deformed to the flattened cross-section at least in the areas in which they run essentially parallel to the plane of the paper machine clothing.

Bei diesem Verfahren werden also für die Bildung des Flächengebildes zunächst hohle Monofilamente und/oder Multifilamente mit hohlen Einzelfasern verwendet, so daß es nicht darauf ankommt, in welcher Orientierung sie in das Flächengebilde eingebracht bzw. eingebunden werden. Die Verformung zu einem abgeflachten Querschnitt geschieht dann durch eine Druck- und Hitzebehandlung, beispielsweise durch Kalandrierung, indem das fertiggestellte Fadensystem zwischen einem oder anderen Paaren von beheizten Walzen hindurchgeführt wird. Hierdurch werden die hohlen Monofilamente bzw. die Multifilamente mit hohlen Einzelfasern plastisch verformt und erhalten auf diese Weise einen abgeflachten Querschnitt. Es können also normale Maschinen für die Herstellung des Flächengebildes verwendet werden. Durch die Druck- und Hitzebehandlung lassen sich außerordentlich dünne Papiermaschinenbespannungen, insbesondere Trockensiebe, verwirklichen, die eine sehr gute Wärmeübertragung garantieren und zudem eine solche Dichte innerhalb des Fadensystems aufweisen, daß die Luftdurchlässigkeit und damit die Flatterneigung nur gering ist. Zudem kann auch das Gewicht einer solchen Papiermaschinenbespannung reduziert werden.In this process, the formation of Fabric initially uses hollow monofilaments and / or multifilaments with hollow individual fibers, so that it does not matter in which orientation they are introduced or integrated into the fabric. The deformation to a flattened cross-section then takes place by a pressure and heat treatment, for example by calendering, in that the finished thread system is passed between one or other pairs of heated rolls. As a result, the hollow monofilaments or the multifilaments with hollow individual fibers are plastically deformed and in this way obtain a flattened cross section. Normal machines can therefore be used for the production of the fabric. Due to the pressure and heat treatment, extremely thin paper machine clothing, in particular dryer fabrics, can be realized, which guarantee very good heat transfer and also have such a density within the thread system that the air permeability and thus the tendency to flutter is only slight. In addition, the weight of such paper machine clothing can also be reduced.

Es ist zwar bekannt, bei Papiermaschinenbespannungen das in Gewebeform vorliegende Fadensystem mit hohlen Monofilamenten zu versehen. Solche Monofilamente waren Stand der Technik, wurden jedoch zunächst auf anderen Gebieten der Technik eingesetzt (vgl. US-PS 2 399 259 und US-PS 3 772 137). Nach der US-PS 4 251 588 verspricht eine mit solchen hohlen Filamenten ausgerüstete Papiermaschinenbespannung eine gegenüber massiven Monofilamenten verbesserte Dimmensionsstabilität insbesondere unter Verformungsbeanspruchungen, wie sie in der Pressenpartie auftreten, einen höheren Grad der Einbindung der Fäden untereinander, eine länger anhaltende Flexibilität und insgesamt eine verbesserte Lebensdauer. Die Verwendung von hohlen Kunststoffschußfäden ist auch der DE-OS 28 47 327 zu entnehmen.It is known to provide the thread system in the form of a fabric with hollow monofilaments in paper machine clothing. Such monofilaments were prior art, but were initially used in other fields of technology (see US Pat. No. 2,399,259 and US Pat. No. 3,772,137). According to US Pat. No. 4,251,588, a paper machine clothing equipped with such hollow filaments promises improved dimensional stability compared to solid monofilaments, in particular under deformation stresses such as occur in the press section, a higher degree of binding of the threads among one another, a longer lasting flexibility and overall an improved Lifespan. The use of hollow plastic weft threads can also be found in DE-OS 28 47 327.

Daneben ist es bekannt, in Papiermaschinenbespannungen hohle Fasern als Träger für eine Behandlungsflüssigkeit einzusetzen (EP-A1 0̸ 191 231). Diese Behandlungsflüssigkeit tritt während des Betriebs der Papiermaschinenbespannung über Öffnungen, beispielsweise am Ende der Fasern, aus, insbesondere um eine Reinigungswirkung zu erzielen. Die Fasern sind dabei Teile von Spinngarnen, Multifilamenten oder aufgenadelten Faservliesen.In addition, it is known to use hollow fibers as carriers for a treatment liquid in paper machine clothing (EP-A1 0̸ 191 231). This treatment liquid escapes through openings, for example at the end of the fibers, during operation of the paper machine clothing, in particular in order to achieve a cleaning effect. The fibers are parts of spun yarns, multifilaments or needled nonwovens.

Bei dem Einsatz von hohlen Monofilamenten ist jedoch ausdrücklich vor einer Abflachung der Fadenquerschnitte gewarnt worden (vgl. US-PS 4 251 588), weshalb die in dieser Druckschrift beschriebenen Hohlmonofilamente nur ein geringes Hohlvolumen in der Größenordnung von 3 bis 15% des gesamten Querschnittes aufweisen.When using hollow monofilaments, however, it has been expressly warned against flattening of the thread cross-sections (cf. US Pat. No. 4,251,588), which is why the hollow monofilaments described in this publication only have a small hollow volume of the order of 3 to 15% of the total cross-section .

In Ausbildung der Erfindung ist vorgesehen, daß die im Querschnitt ringförmigen Monofilamente bzw. Fasern der Multifilamente derart verformt sind, daß sie mit ihren Innenseiten aneinanderliegen, d. h. maximal abgeflacht sind, um zu einem möglichst dünnen Fadensystem zu kommen.In an embodiment of the invention it is provided that the monofilaments or fibers of the multifilaments, which are ring-shaped in cross-section, are deformed in such a way that their inner sides abut one another, ie. H. are flattened as much as possible in order to achieve the thinnest possible thread system.

Sofern die Papiermaschinenbespannung aus dem textilen Flächengebilde besteht, kommt insbesondere der Einsatz als Trockensieb in Frage. Grundsätzlich kann die Erfindung auch für alle übrigen Arten von Papiermaschinenbespannung zum Einsatz kommen. Sofern die Papiermaschinenbespannung als Preßfilz gedacht ist, besteht die Möglichkeit, das textile Flächengebilde mit den abgeflachten Fäden ein- oder beidseitig in an sich bekannter Weise mit einem Faservlies zu vernadeln, so daß die Bespannung ein- oder beidseitig eine filzartige Oberfläche erhält.If the paper machine clothing consists of the textile fabric, use as a dryer fabric is particularly suitable. In principle, the invention can also be used for all other types of paper machine clothing. If the paper machine clothing is intended as a press felt, there is the possibility of needling the textile fabric with the flattened threads on one or both sides in a manner known per se with a nonwoven fabric, so that the covering is given a felt-like surface on one or both sides.

Die erfindungsgemäß verformten, ringförmigen Monofilamente bzw. Multifilamente mit ringförmigen Einzelfasern können grundsätzlich sowohl in Längs- als auch in Querrichtung in das Fadensystem eingebracht werden. Wesentliche Vorteile werden jedoch auch dann schon erreicht, wenn diese Monofilamente bzw. Multifilamente nur in einer Richtung der Papiermaschinenbespannung verlaufen, und zwar wenn das Fadensystem flachgewebt ist, vorzugsweise in Querrichtung. Für die Längsrichtung können dann im Querschnitt runde Fäden verwendet werden. Es können aber auch massive Flachdrähte zum Einsatz kommen, da sich Kettfäden in einer Webmaschine leichter verdrillfrei halten lassen als Schußfäden.The ring-shaped monofilaments or multifilaments with ring-shaped individual fibers deformed according to the invention can in principle be introduced into the thread system both in the longitudinal and in the transverse direction. Significant advantages however, this has already been achieved when these monofilaments or multifilaments run only in one direction of the paper machine clothing, specifically when the thread system is woven flat, preferably in the transverse direction. Cross-sectionally round threads can then be used for the longitudinal direction. However, solid flat wires can also be used, since warp threads can be kept twist-free more easily than weft threads in a weaving machine.

Soweit die Papiermaschinenbespannung ein als Gewebe ausgebildetes Flächengebilde aufweist oder daraus besteht, hat es sich als vorteilhaft erwiesen, daß das Gewebe auf beiden Seiten eine gleiche Bindung hat, also insoweit symmetrisch ausgebildet ist.Insofar as the paper machine clothing has or consists of a fabric formed as a fabric, it has proven to be advantageous that the fabric has the same weave on both sides, that is to say it is symmetrical in this respect.

Eine vorteilhafte Weiterentwicklung des erfindungsgemäßen Verfahrens besteht darin, für das Flächengebilde als Ausgangsmaterial hohle Monofilamente und/oder hohle Fasern für die Multifilamente zu verwenden, die außen- und innenseitig kreisrunden Querschnitt haben, bevor sie plastisch verformt werden. Es kommt dann nicht darauf an, in welcher Orientierung sie in das Fadensystem eingebracht werden.An advantageous further development of the method according to the invention consists in using hollow monofilaments and / or hollow fibers for the multifilaments as starting material for the flat structure, which have circular cross sections on the outside and inside before they are plastically deformed. The orientation in which they are introduced into the thread system is then irrelevant.

Nach der Erfindung sollten ferner hohle Monofilamente bzw. hohle Einzelfasern für die Multifilamente verwendet werden, die eine freie Querschnittsfläche haben, die zwischen 20 und 80̸%, vorzugsweise 40̸ bis 60̸% der gesamten Querschnittsfläche liegt. Mit besonders dünnwandigen Monofilamenten bzw. Fasern lassen sich stark abgeflachte Fadenquerschnitte erzielen, wobei die Dünnwandigkeit durch die jeweils aufzunehmenden Kräfte begrenzt wird.According to the invention, hollow monofilaments or hollow individual fibers should also be used for the multifilaments, which have a free cross-sectional area that is between 20 and 80%, preferably 40 to 60% of the total cross-sectional area. With particularly thin-walled monofilaments or fibers, heavily flattened thread cross-sections can be achieved, the thin-walled area being limited by the forces to be absorbed in each case.

In der Zeichnung ist die Erfindung an Hand eines Ausführungsbeispiels näher veranschaulicht. Es zeigen:

Figur (1)
einen teilweisen Längsschnitt durch eine Papiermaschinenbespannung parallel zu dessen Laufrichtung;
Figur (2)
einen teilweisen Querschnitt durch die Papiermaschinenbespannung gemäß Figur (1) in der Ebene A-A (Figur 1);
Figur (3)
einen teilweisen Querschnitt durch die Papiermaschinenbespannung gemäß Figur (1) in der Ebene B-B (Figur 1);
Figur (4)
einen teilweisen Längsschnitt durch die Papiermaschinenbespannung gemäß den Figuren (1) bis (3) nach einer Kalandrierbehandlung;
Figur (5)
einen Querschnitt durch die Papiermaschinenbespannung gemäß Figur (4) in der Ebene C-C (Figur 4);
Figur (6)
einen teilweisen Querschnitt durch die Papiermaschinenbespannung gemäß Figur (4) in der Ebene D-D (Figur 4).
In the drawing, the invention is illustrated in more detail using an exemplary embodiment. Show it:
Figure (1)
a partial longitudinal section a paper machine clothing parallel to its direction of travel;
Figure (2)
a partial cross section through the paper machine clothing according to Figure (1) in the plane AA (Figure 1);
Figure (3)
a partial cross section through the paper machine clothing according to Figure (1) in the plane BB (Figure 1);
Figure (4)
a partial longitudinal section through the paper machine clothing according to the figures (1) to (3) after a calendering treatment;
Figure (5)
a cross section through the paper machine clothing according to Figure (4) in the plane CC (Figure 4);
Figure (6)
a partial cross section through the paper machine clothing according to Figure (4) in the plane DD (Figure 4).

Das in den Figuren dargestellte Trockensieb (1) ist für die Trockenpartie einer Papiermaschine bestimmt. Es besteht aus einem hier nur beispielhaft in Leinwandbindung ausgeführten Gewebe (2) mit sich in Querrichtung, d. h. quer zu vorgesehenen Laufrichtung des Trockensiebes (1) erstreckenden Querfäden (3, 4, 5) und sich längs der Laufrichtung erstreckenden Längsfäden (6, 7, 8, 9).The dryer fabric (1) shown in the figures is intended for the dryer section of a paper machine. It consists of a fabric (2), which is only shown here as an example in plain weave, with itself in the transverse direction, i.e. H. transverse threads (3, 4, 5) extending transversely to the intended running direction of the drying wire (1) and longitudinal threads (6, 7, 8, 9) extending along the running direction.

Die Querfäden (3, 4, 5) verlaufen relativ gerade durch den Körper des Gewebes (2) und sind als massive Monofilamente ausgebildet. Für die Längsfäden (6, 7, 8, 9) sind bei der Herstellung des Gewebes (2) im Querschnitt ringförmige Hohlmonofilamente verwendet worden, wie sich insbesondere aus den Figuren (2) und (3) ersehen läßt. Die Längsfäden (6, 7, 8, 9) haben dabei zunächst innen- wie außenseitig einen kreisförmigen Querschnitt und binden die Querfäden (3, 4, 5) ein.The transverse threads (3, 4, 5) run relatively straight through the body of the fabric (2) and are designed as solid monofilaments. For the longitudinal threads (6, 7, 8, 9) are annular in cross-section during the manufacture of the fabric (2) Hollow monofilaments have been used, as can be seen in particular from Figures (2) and (3). The longitudinal threads (6, 7, 8, 9) initially have a circular cross section on the inside and outside and tie in the cross threads (3, 4, 5).

Nach dem Webprozeß wird das Gewebe (2) einer Kalandrierbehandlung unterworfen, indem es zwischen Paaren von gegeneinandergedrückten Kalandrierwalzen hindurchgeleitet wird, wobei diese Kalandrierbehandlung auch mehrfach erfolgen kann. Auf Grund dieser Kalandrierbehandlung werden die Flachseiten des Gewebes (2) einer gleichzeitigen Druck- und Hitzebehandlung unterzogen. Diese hat zur Folge, daß die als Hohlmonofilamente ausgebildeten Längsfäden (6, 7, 8, 9) flachgedrückt werden, also einen nahezu rechteckigen Querschnitt einnehmen, wobei die Innenseiten der Längsfäden (6, 7, 8, 9) aufeinander zu liegen kommen, wie dies inbesondere aus den Figuren (5) und (6) deutlich wird.After the weaving process, the fabric (2) is subjected to a calendering treatment by passing it between pairs of calendering rollers pressed against one another, which calendering treatment can also be carried out several times. Due to this calendering treatment, the flat sides of the fabric (2) are subjected to a simultaneous pressure and heat treatment. The consequence of this is that the longitudinal threads (6, 7, 8, 9) designed as hollow monofilaments are flattened, that is to say they assume an almost rectangular cross section, the inside of the longitudinal threads (6, 7, 8, 9) coming to lie on top of one another, such as this is particularly clear from Figures (5) and (6).

Wie beim Vergleich der Figuren (1) und (4) erkennbar ist, wird die Dicke des Trockensiebes (1) auf Grund der Abflachung der Längsfäden (6, 7, 8, 9) erheblich verringert. Die Dicke könnte noch weiter dadurch verringert werden, daß auch für die Querfäden (3, 4, 5) Hohlmonofilamente verwendet werden.As can be seen in the comparison of the figures (1) and (4), the thickness of the drying wire (1) is considerably reduced due to the flattening of the longitudinal threads (6, 7, 8, 9). The thickness could be reduced even further by using hollow monofilaments for the transverse threads (3, 4, 5).

Claims (10)

Papiermaschinenbespannung, mit oder bestehend aus einem textilen Flächengebilde, z. B. einem Gewebe, Gewirke, Gelege oder dergleichen, das abgeflachte Fäden aufweist, wobei sich jeweils die längere Achse des Querschnitts dieser Fäden parallel zur Ebene der Papiermaschinenbespannung erstreckt, dadurch gekennzeichnet, daß die abgeflachten Fäden (6, 7, 8, 9) aus im Querschnitt ringförmigen Monofilamenten und/oder aus Multifilamente, die aus im Querschnitt ringförmigen Einzelfasern gebildet sind, bestehen, wobei die im Querschnitt ringförmigen Monofilamente bzw. Einzelfasern der Multifilamente wenigstens in den Bereichen, in denen sie im wesentlichen parallel zur Ebene der Papiermaschinenbespannung (1) verlaufen, plastisch zu dem abgeflachten Querschnitt verformt sind.Paper machine clothing, with or consisting of a textile fabric, e.g. B. a fabric, knitted fabric, scrim or the like, which has flattened threads, each extending the longer axis of the cross section of these threads parallel to the plane of the paper machine clothing, characterized in that the flattened threads (6, 7, 8, 9) Monofilaments that are ring-shaped in cross-section and / or multifilaments that are formed from individual fibers that are ring-shaped in cross-section, the monofilaments or individual fibers of the multifilaments that are ring-shaped in cross-section at least in the areas in which they are essentially parallel to the plane of the paper machine clothing (1). run, are plastically deformed to the flattened cross-section. Papiermaschinenbespannung nach Anspruch 1,
dadurch gekennzeichnet, daß die im Querschnitt ringförmigen Monofilamente (6, 7, 8, 9) bzw. Einzelfasern der Multifilamente derart verformt sind, daß ihre Innenseiten aneinanderliegen.Paper machine clothing according to claim 1,
characterized in that the monofilaments (6, 7, 8, 9) or individual fibers of the multifilaments, which are annular in cross section, are deformed in such a way that their inner sides abut one another. Papiermaschinenbespannung nach einem der Ansprüche 1 oder 2,
dadurch gekennzeichnet, daß das textile Flächengebilde ein- oder beidseitig mit einem Faservlies vernadelt ist.Paper machine clothing according to one of claims 1 or 2,
characterized in that the textile fabric is needled on one or both sides with a non-woven fabric. Papiermaschinenbespannung Anspruch 1 bis 3
dadurch gekennzeichnet, daß die ringförmigen Monofilamente bzw. Multifilamente mit ringförmigen Einzelfasern nur in Querrichtung der Papiermaschinenbespannung (1) verlaufen.Paper machine clothing claims 1 to 3
characterized in that the annular monofilaments or multifilaments with ring-shaped individual fibers only run in the transverse direction of the paper machine clothing (1). Papiermaschinenbespannung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet, daß die Papiermaschinenbespannung (1) ein als Gewebe (2) ausgebildetes Flächengebilde aufweist oder daraus besteht und daß das Gewebe (2) auf beiden Seiten eine gleiche Bindung hat.Paper machine clothing according to one of claims 1 to 4,
characterized in that the paper machine clothing (1) has or consists of a fabric formed as a fabric (2) and that the fabric (2) has the same weave on both sides. Verfahren zur Herstellung einer Papiermaschinenbespannung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß für das textile Flächengebilde als Ausgangsmaterial hohle Monofilamente (6, 7, 8, 9) und/oder Multifilamente mit hohlen Einzelfasern verwendet werden und daß das damit versehene Flächengebilde einer solchen Druck- und Hitzebehandlung ausgesetzt wird, daß die Mono- bzw. Multifilamente wenigstens in den Bereichen, in denen sie im wesentlichen parallel zur Ebene der Papiermaschinenbespannung verlaufen, plastisch zu dem abgeflachten Querschnitt verformt werden.Method for producing a paper machine clothing according to one of claims 1 to 5,
characterized in that hollow monofilaments (6, 7, 8, 9) and / or multifilaments with hollow individual fibers are used as the starting material for the textile fabric and that the fabric provided with it is subjected to such pressure and heat treatment that the mono- or Multifilaments are plastically deformed to the flattened cross-section at least in the areas in which they run essentially parallel to the plane of the paper machine clothing. Verfahren nach Anspruch 6,
dadurch gekennzeichnet, daß für das Flächengebilde (2) als Ausgangsmaterial hohle Monofilamente (6, 7, 8, 9) und/oder hohle Einzelfasern für die Multifilamente verwendet werden, die außen- und innenseitig kreisrunden Querschnitt haben.Method according to claim 6,
characterized in that hollow monofilaments (6, 7, 8, 9) and / or hollow individual fibers for the multifilaments are used as starting material for the flat structure (2), which have a circular cross section on the outside and inside. Verfahren nach Anspruch 7,
dadurch gekennzeichnet, daß die hohlen Monofilamente (6, 7, 8, 9) bzw. Einzelfasern der Multifilamente eine freie Querschnittsinnenfläche haben, die zwischen 20̸ und 80̸%, vorzugsweise 40̸ bis 60̸%, der gesamten Querschnittsfläche liegt.Method according to claim 7,
characterized in that the hollow monofilaments (6, 7, 8, 9) or individual fibers of the multifilaments have a free cross-sectional inner surface which is between 20̸ and 80̸%, preferably 40̸ to 60̸%, of the total cross-sectional area. Verfahren nach einem der Ansprüche 6 bis 8,
dadurch gekennzeichnet, daß die hohlen Monofilamente bzw. die Multifilamente mit hohlen Einzelfasern nur in Querrichtung der Papiermaschinenbespannung (1) in das Fadensystem (2) eingebracht werden.Method according to one of claims 6 to 8,
characterized in that the hollow monofilaments or the multifilaments with hollow individual fibers are introduced into the thread system (2) only in the transverse direction of the paper machine clothing (1). Verfahren nach einem der Ansprüche 6 bis 9,
dadurch gekennzeichnet, daß das Fadensystem (2) für die Druck- und Hitzebehandlung kalandriert wird.Method according to one of claims 6 to 9,
characterized in that the thread system (2) is calendered for the pressure and heat treatment.
EP92119517A 1991-11-19 1992-11-14 Papermaking fabric, in particular dryer felt Expired - Lifetime EP0544167B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4137984 1991-11-19
DE4137984A DE4137984C1 (en) 1991-11-19 1991-11-19

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EP0544167A1 true EP0544167A1 (en) 1993-06-02
EP0544167B1 EP0544167B1 (en) 1996-01-03

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US (1) US5407737A (en)
EP (1) EP0544167B1 (en)
AT (1) ATE132553T1 (en)
CA (1) CA2083231C (en)
DE (2) DE4137984C1 (en)
ES (1) ES2084248T3 (en)
FI (1) FI96229C (en)

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WO1995025188A1 (en) * 1994-03-14 1995-09-21 E.I. Du Pont De Nemours And Company Hollow nylon filaments and yarns and process for making same
WO2005111302A1 (en) * 2004-05-19 2005-11-24 Wangner Gmbh & Co. Kg Forming sieve for the wet end section of a paper machine
US7514030B2 (en) 2002-12-30 2009-04-07 Albany International Corp. Fabric characteristics by flat calendering
US7727360B2 (en) 2004-05-19 2010-06-01 Wangner Gmbh Forming sieve for the wet end section of a paper machine

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US5617903A (en) * 1996-03-04 1997-04-08 Bowen, Jr.; David Papermaker's fabric containing multipolymeric filaments
GB9609761D0 (en) * 1996-05-10 1996-07-17 Jwi Ltd Low air permeability papermaking fabric including flattened secondary weft yarns and pin seam
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KR100782661B1 (en) * 2001-08-02 2007-12-07 뮬렌 손 게엠베하 엔드 캄파니 Fabric belt for a corrugated board gluing machine
JP4460459B2 (en) * 2002-12-16 2010-05-12 アルバニー インターナショナル コーポレイション Hydroentanglement method using fabric made of flat filaments
US7207356B2 (en) * 2004-05-19 2007-04-24 Voith Paper Patent Gmbh Through air dryer fabric
DE202004015498U1 (en) * 2004-10-06 2006-02-16 Haver & Boecker Ohg Stable, inexpensive filter cloth, especially for deep filtration, formed from woven, crossed warp and weft threads consisting partly of monofil and/or multifil threads and partly of metal or plastics wires
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WO1995025188A1 (en) * 1994-03-14 1995-09-21 E.I. Du Pont De Nemours And Company Hollow nylon filaments and yarns and process for making same
US5643660A (en) * 1994-03-14 1997-07-01 E. I. Du Pont De Nemours And Company Hollow nylon filaments and yarns
US7514030B2 (en) 2002-12-30 2009-04-07 Albany International Corp. Fabric characteristics by flat calendering
WO2005111302A1 (en) * 2004-05-19 2005-11-24 Wangner Gmbh & Co. Kg Forming sieve for the wet end section of a paper machine
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US7727360B2 (en) 2004-05-19 2010-06-01 Wangner Gmbh Forming sieve for the wet end section of a paper machine
US8444825B2 (en) 2004-05-19 2013-05-21 Wangner Gmbh Forming sieve for the wet end section of a paper machine

Also Published As

Publication number Publication date
DE59204922D1 (en) 1996-02-15
DE4137984C1 (en) 1992-12-17
EP0544167B1 (en) 1996-01-03
ES2084248T3 (en) 1996-05-01
FI925222A (en) 1993-05-20
US5407737A (en) 1995-04-18
FI925222A0 (en) 1992-11-18
FI96229B (en) 1996-02-15
ATE132553T1 (en) 1996-01-15
CA2083231C (en) 2003-11-11
CA2083231A1 (en) 1993-05-20
FI96229C (en) 1996-05-27

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