EP0106132A2 - Tissu pour papeterie comportant des fils tricotés - Google Patents

Tissu pour papeterie comportant des fils tricotés Download PDF

Info

Publication number
EP0106132A2
EP0106132A2 EP83108879A EP83108879A EP0106132A2 EP 0106132 A2 EP0106132 A2 EP 0106132A2 EP 83108879 A EP83108879 A EP 83108879A EP 83108879 A EP83108879 A EP 83108879A EP 0106132 A2 EP0106132 A2 EP 0106132A2
Authority
EP
European Patent Office
Prior art keywords
fabric
yarns
open mesh
yarn
synthetic
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.)
Withdrawn
Application number
EP83108879A
Other languages
German (de)
English (en)
Other versions
EP0106132A3 (fr
Inventor
Leonard R. Lefkowitz
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.)
Huyck Corp
Original Assignee
Huyck Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huyck Corp filed Critical Huyck Corp
Publication of EP0106132A2 publication Critical patent/EP0106132A2/fr
Publication of EP0106132A3 publication Critical patent/EP0106132A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/0027—Screen-cloths
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F7/00—Other details of machines for making continuous webs of paper
    • D21F7/08—Felts
    • D21F7/083—Multi-layer felts

Definitions

  • This invention relates to papermaker's fabrics, in general, and to forming fabrics, dryer fabrics and press felts containing incompressable yarns with an open mesh configuration in particular.
  • the web is formed by depositing the slurry of pulp fibers onto a forming fabric, generally a woven belt of wire and/or synthetic material to form a continuous sheet of paper-like material
  • a forming fabric generally a woven belt of wire and/or synthetic material
  • a large portion of the water is normally extracted from the web in the forming area by the use of gravity drainage aided by table rolls and suction boxes.
  • the web then passes through a series of press nips formed by cooperating press rolls in the press section, whereby water is pressed from the web, the water being absorbed by the press felt.
  • the paper web is then transferred to a dryer felt in the dryer section of the machine where it is conducted over and between dryer rolls which are heated and which effect removal of most of the remaining water by evaporation.
  • the sheet contacting surface should be smooth so that the paper sheet is uniformly compressed in the press nip and water from within the sheet can be expressed uniformly into the felt. It is known that the press felt must contain void spaces and interconnected fluid passageways for the accommodation and movement of water from the sheet into and through the felt.
  • Press felts must also maintain their dimensional stability so that throughout life, they do not change in length or width more than can be accommodated on the paper machine. To achieve stability, it is common practice to incorporate a woven base fabric below a sheet contacting needled fibrous batting surface layer. In some cases, the base fabric may be covered with batt on both top and bottom surfaces.
  • incompressible base fabric it is meant that the base fabric resists compaction during operation on the paper machine, retaining a substantial portion of its original thickness and void space for the accommodation of sheet moisture, even after prolonged operation on the paper machine.
  • Imcompressible base fabrics owe their resistance to compaction to the incorporation and interlacing of incompressible yarns in the woven structure.
  • the incompressible base fabric yarns If a smooth paper sheet is to be made, it is necessary to cover the incompressible base fabric yarns with enough fibrous batting to insure that a uniform pressure is applied against the sheet. In general, the amount of batting needed to obscure base fabric yarns and weave pattern is proportional to the smoothness of the base fabric. When small incompressible yarns are woven together into a smooth base fabric, the needled fibrous batt layer may be thin, while still providing sufficient cover to bridge over the base fabric weave.
  • the incompressible base fabric be made thick, so that it will possess a high void volume able to accommodate large quantities of sheet water.
  • Such thick incompressible base fabrics have been made in the past by using large yarns in a single layer fabric, by using multiple yarn layers in a complex weave, or by using more than one base fabric in the same felt.
  • incompressible base fabrics are made thick through the use of large incompressible yarns, such coarse yarns tend to impart an objectionable and in some cases, an unacceptable mark to the paper sheet. If more batt is applied in an effort to erase the mark, the point may be reached where the felt is rendered useless in that it no longer can be dewatered by conventional vacuum means. Yet, such fabrics offer the advantage that they can be woven rapidly, owing to the fact that relatively few yarns are needed to construct a thick, high void volume base fabric from coarse yarns.
  • Another present-day alternative method of achieving thick incompressible base structures is to combine two fabrics, one being superimposed over the other in a single needled papermakers felt. Obviously, the expense of this method of achieving a thick incompressible base fabric must be about double the cost of using a single base fabric in the felt.
  • fluid permeability and void volume are achieved by interlacing nonpermeable incompressible yarns together to create void spaces in the fabric which are external to the imcompressible yarns.
  • the incompressible yarns themselves being comprised of monofilaments, twisted monofilaments, resin filled multifilament yarns, or the like, are not fluid permeable nor do they contain internal void spaces.
  • Present incompressible woven base fabrics must be woven in an open weave arrangement, i.e., with readily observable spaces left between adjacent yarns to achieve permeability and void volume.
  • State of the art incompressible base fabric yarns themselves possess virtually no internal fluid passageways or void space.
  • dryer fabrics tend to accumulate debris from the paper sheet during operation on the paper machine. With time, a progressive fillup takes place, particularly at fabric interstices. This fillup reduces permeability and can lead to premature failure and removal of the fabric.
  • monofilament yarns are used as the preferred incompressible dryer fabric yarn, not only because of their outstanding resistance to deformation, but also because such yarns, having smooth outside surfaces, tend to resist contamination better than other types of yarns.
  • Dryer fabrics contribute to paper machine speed and efficiency by performing several useful functions, one of which is to press the west paper sheet against the hot surface of the drying cans, thereby facilitating heat transfer to the sheet and speeding up the drying process.
  • the dryer fabric would press uniformly against the sheet, while still permitting ready egress of moisture laden air or steam.
  • dryer fabrics should possess numerous closely spaced sheet contact points, with fluid-permeable passageways therebetween.
  • dryer fabrics are limited in the extent to which they can achieve intimate sheet contact, controlled air permeability, and resistance to fillup, using current fabrication materials and techniques. For instance, when dryer fabrics are tightly woven, with closely spaced yarns, pressure uniformity against the paper sheet is improved, but at the expense of reduced air permeability and accelerated filling up of the small fabric interstices. On the other hand, when dryer fabrics are made with large spaces between yarns, porosity is improved, along with reduced fillup tendency; however, pressure uniformity against the paper sheet is adversly affected owing to the large gap between adjacent yarns.
  • incompressible open mesh yarns are incorporated into forming fabrics, dryer fabrics, and press felts.
  • a separate yarn insert may be included as a design alternative.
  • open mesh yarns means yarns comprised of one or more incompressible component strands that are interlaced together by a process such as weaving, knitting, crocheting, braiding, knit-braiding or the like to form a continuous incompressible yarn assembly.
  • This yarn assembly is characterized by frequent structural interlacings, crossovers, or loops along the length of the yarn, and void spaces located between adjacent interlaced strands, forming interconnected fluid passageways therebetween.
  • Special incompressible porous open mesh yarn structures can be incorporated into papermaker's forming fabrics, dryer fabrics, and press felts to achieve novel fabric constructions.
  • These open mesh yarn structures contain void spaces which remain permeable to fluid flow, even when said open mesh yarns are incorporated in fabrics and subjected to continuous operation on papermaking forming, pressing and drying sections.
  • open mesh yarn structures comprise one or more incompressible yarn strands interlaced together by the process of knitting, crocheting, braiding, knit-braiding, weaving, or the like, to produce narrow tubular or flat open mesh yarns.
  • the strand or strands comprising the open mesh yarn are composed of monofilament synthetic polymers such as nylon, polyester, or other incompressible polymer materials.
  • monofilament synthetic polymers such as nylon, polyester, or other incompressible polymer materials.
  • multifilaments or spun yarns may also be used, provided that such yarns are rendered incompressible by any process known in the art, such as resin impregnation and curing.
  • incompressible when referring to yarns of this invention, means yarns which are resistant to deformation under the pressures they are subjected to in operation on the paper machine.
  • Monofilament yarns made of non-elastic polymer materials such as polyester, nylon, or polycarbonate, are considered to be incompressible yarns by this definition; whereas, yarns made from these same polymer materials in the form of continuous multifilament or spun yarns may be expected to undergo substantial deformation in use on the paper machine and are therefore considered to be compressible yarns.
  • plastic net extrusion equipment could be adapted to make flat or tubular narrow open mesh constructions for insertion into papermaker's felts, forming fabrics, and dryer fabrics.
  • the extruded materials would be fused together at mesh cross-over points, and would still retain sufficient pliability for weaving into fabrics.
  • incompressible open mesh yarns are to be used in a papermaker's fabric comprising interwoven weft and warp systems, then, in every weave repeat, at least one yarn in one of said systems should comprise an incompressible open mesh yarn.
  • Open mesh yarns can be used advantageously as weft or warp yarns in forming fabrics.
  • One purpose of incorporating open mesh yarns in forming fabrics is to permit substitution of fewer large mesh yarns in place of many fine conventional yarns to effect important manufacturing savings.
  • a fine open mesh yarn measuring 100 mils in width and having a self-contained interconnected fine mesh network of ten strands from side-to- side could replace ten conventional fine yarns at a substantial savings inbom production time.
  • the incompressible open mesh yarn of this invention may be used advantageously in the sheet contact layer. Because forming fabrics are subject to little if any sheet side surface pressure during use, it would be preferable to carry out special surface finishing steps such as compressing, heat setting, fusion bonding, or chemical treatment to preform the sheet contact layer of the fabric into a smooth continuous open mesh surface for minimum sheet marking.
  • inserts located in the center of a tubular open-mesh yarn.
  • Such insert may be made, for example, from high tenacity polyester monofilament or from an aramid multifilament yarn, such as Kevlar 29"', a product of Dupont Corporation.
  • Open mesh yarns can be used advantageously as loom weft or loom warp in press felts. Owing to the relatively fine internal pore structure of the open mesh yarn, wide yarns could be woven to effectuate significant savings in fabrication and the finished felt surface would still produce little weave knuckle mark by virtue of the network of fine interlaced and interconnected strands within the open mesh yarn. Furthermore, such incompressible open mesh yarns serve to provide substantial void space within the felt due to their resistance to deformation under pressure.
  • open mesh yarns can also be used advantageously between a coarse yarn base structure and a fine batt fiber capping layer of a press felt.
  • the open mesh yarn would form a much more uniform batt than could be obtained with coarse fibers using presently available nonwoven random batt forming methods.
  • the adherence of the coarse mesh layer to the base fabric substrate would probably be better than could be obtained by needling alone.
  • Open mesh yarns can also be used advantageously as warp yarns in fillingless felts of the type disclosed in U.S. 3,392,079, the teachings of which are incorporated herein by reference.
  • a loosely cohesive base fabric is formed from a plurality of spaced fuzzy or spuriously fibered warp yarns and, in place of weft or filling yarns, fibers oriented substantially at right angles to the warp yarns are needled to one or both sides of the base fabric.
  • Insertion of a polyurethane or rubber cut strand or monofilament in the core position of a porous open mesh yarn would provide further benefits to felt performance by acting as a shock absorber, thereby reducing press vibration on heavily loaded positions.
  • Open mesh yarns can also be used advantageously as weft or warp yarns in dryer fabrics. Papermaker's dryer fabrics, having controlled permeability over a wide range, may be fabricated from open mesh yarns using many less weave interlacings than would be necessary using conventional yarns. Nevertheless, such dryer fabrics would possess a high surface contact area, by virtue of the many individual open mesh yarn elements which would be brought into contact with the sheet.
  • a spun yarn insert could be added to the open mesh yarn. This insert could reduce air permeability without adversely affecting fill-up, since the insert would be isolated from sheet contact by the open mesh monofilament sheath. If the insert possessed springiness, it could further enhance open mesh yarn contact with the paper, thus aiding drying rate.
  • the incompressible open mesh yarn 1, of Fig. 1 was made on a four needle Model 2NBA knit braiding machine manufactured by the Lamb Knitting Machine Corporation Chicopee, Massachusetts.
  • This open mesh yarn 1 was comprised of four 1370 denier polyester monofilament strands 2 of 0.015 inches diameter.
  • the individual monofilaments 2 were interlaced in what is known as the alternate crossover pattern,with six courses per linear inch.
  • the open mesh yarn so formed was 22,050 denier and weighed approximately sixteen times as much as a single monofilament component strand, the mesh yarn being the product of four strands each following a different circuitous path about the other strands as it interlaced into the structure.
  • the incompressible open mesh yarn 4, of Fig. 2 was made on a six needle knit-braiding machine similar to that used in Example 1.
  • six 0.010 inch diameter polyester monofilament yarns formed a tubular open mesh structure which contained a nylon resin treated continuous filament yarn insert 5 of 0.032 inch diameter.
  • Open mesh yarns containing inserts which are stretch resistant are particularly well suited for use in the machine direction of paper machine forming fabrics, felts, and dryer fabrics.
  • the press felt base fabric 6, of Fig. 3 was woven in a broken twill weave with eight ends per inch of 840 denier nylon multifilament yarn 7 in the cross machine direction and ten yarns per inch of 18,000 denier tubular knit- braid incompressible open mesh yarn 8 in the machine direction.
  • the open mesh yarn was comprised of six polyester monofilament strands 9 of 0.010 inch diameter with an insert 10 of sic ply 0.008 inch diameter cabled polyester monofilament yarn.
  • the insert is depicted in Fig. 3 as if the mesh yarn sheath had been removed at the edge of the photograph.
  • the cabled monofilament yarn insert provides additional stretch resistance in the tension or machine direction of the fabric. Both plied and cabled monofilament yarns can be used beneficially as open mesh yarn inserts.
  • this base fabric practically no visible void space existed between adjacent open mesh yarns. Yet, due to the presence of substantial interconnected void spaces within the open mesh yarns themselves, this base fabric possessed high void volume and an air permeability in excess of 700 cubic feet/minute/square foot measured at 0.5 inch water pressure differential. Also, the inclusion of very large incompressible open mesh yarns did not result in the usual pronounced knuckle pattern at yarn crossover points, due to the fine internal open mesh yarn network of interlacings.
  • the open mesh yarns contain a plurability of spaced apart individual component strands, which effectively spread the compression load over a multitude of strand crossovers within the open mesh yarn itself.
  • Fabrics of this type are well suited for the purpose of mist elimination, where large surface areas and high permeability are needed to obtain adequate flow rates at high liquid entrainment efficiencies.
  • a felt base fabric 11 was made using small 840 denier nylon continuous filament warp yarns 13, nylon monofilament weft yarns with .010 inch diameters 14 and 14' and large 14,500 denier polyester open mesh stuffer yarns 12.
  • the open mesh stuffer yarn 12 was laid in the fabric without actually interlacing, weaving being accomplished solely through interlacing of the fine multifilament warp yarns 13 with the nylon monofilament filling yarns 14 and 14'.
  • Filling yarn 14 weaved above all open mesh stuffer yarns 12, interlacing with warp yarns 13; whereas filling yarn 14' maintained a constant path below all of the mesh yarns 12 present in the fabric, while interlacing with warp yarns 13 as they alternately passed from top to bottom of the fabric.
  • the laid in open mesh stuffer yarns 12 contribute substantially to the thickness and void volume of the felt base fabric, yet they do not create pronounced irregularities in the fabric at yarn crossovers due to the fact that they are comprised of a multiplicity of smaller monofilament members, and also, because in this construction, the open mesh stuffer yarns maintain a central position in the fabric.
  • a batting 15 of 15 denier nylon fiber was needled to the top and bottom surfaces of the base fabric to complete the felt.

Landscapes

  • Paper (AREA)
  • Woven Fabrics (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP83108879A 1982-09-30 1983-09-08 Tissu pour papeterie comportant des fils tricotés Withdrawn EP0106132A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43050582A 1982-09-30 1982-09-30
US430505 1982-09-30

Publications (2)

Publication Number Publication Date
EP0106132A2 true EP0106132A2 (fr) 1984-04-25
EP0106132A3 EP0106132A3 (fr) 1984-08-29

Family

ID=23707832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108879A Withdrawn EP0106132A3 (fr) 1982-09-30 1983-09-08 Tissu pour papeterie comportant des fils tricotés

Country Status (6)

Country Link
EP (1) EP0106132A3 (fr)
JP (1) JPS5982492A (fr)
AU (1) AU1641583A (fr)
BR (1) BR8304376A (fr)
FI (1) FI832191L (fr)
NO (1) NO833525L (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290653A1 (fr) * 1987-05-14 1988-11-17 Thomas Josef Heimbach GmbH & Co. Bande de matériaux
US4838043A (en) * 1988-04-18 1989-06-13 New England Overseas Corporation, Inc. Circular warp knit composite cord
GB2226578B (en) * 1989-01-03 1993-01-06 Albany Int Corp Papermaking fabric
FR2727442A1 (fr) * 1994-11-24 1996-05-31 Cofpa Feutre de papeterie pour partie humide de machine de fabrication de papier
US5945357A (en) * 1997-10-07 1999-08-31 Wangner Systems Corporation Multi-layer press fabric comprising looped, knit yarns woven in an upper layer of fabric
WO2004044313A1 (fr) * 2002-11-12 2004-05-27 Tamfelt Oyj Abp Fil de sechage
WO2020027996A1 (fr) * 2018-07-30 2020-02-06 Astenjohnson International, Inc. Feutre de presse cousu doté de fils de support de couture monofilament

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR539899A (fr) * 1921-06-29 1922-07-01 Christfried Petzoldt Méthode de fabrication de feutres tissés pour l'industrie du papier et de la cellulose
CH100712A (de) * 1922-05-06 1923-08-16 Petzoldt Christfried Gewebtes Filztuch für Papier-, Holzstoff- und Zellstoffmaschinen.
EP0059973A1 (fr) * 1981-03-11 1982-09-15 Cofpa Compagnie Des Feutres Pour Papeteries Et Des Tissus Industriels Feutre de papeterie de partie humide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR539899A (fr) * 1921-06-29 1922-07-01 Christfried Petzoldt Méthode de fabrication de feutres tissés pour l'industrie du papier et de la cellulose
CH100712A (de) * 1922-05-06 1923-08-16 Petzoldt Christfried Gewebtes Filztuch für Papier-, Holzstoff- und Zellstoffmaschinen.
EP0059973A1 (fr) * 1981-03-11 1982-09-15 Cofpa Compagnie Des Feutres Pour Papeteries Et Des Tissus Industriels Feutre de papeterie de partie humide

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0290653A1 (fr) * 1987-05-14 1988-11-17 Thomas Josef Heimbach GmbH & Co. Bande de matériaux
US4948658A (en) * 1987-05-14 1990-08-14 Thomas Josef Heimbach Gmbh & Co. Strip of material and its manufacturing method
US4838043A (en) * 1988-04-18 1989-06-13 New England Overseas Corporation, Inc. Circular warp knit composite cord
GB2226578B (en) * 1989-01-03 1993-01-06 Albany Int Corp Papermaking fabric
FR2727442A1 (fr) * 1994-11-24 1996-05-31 Cofpa Feutre de papeterie pour partie humide de machine de fabrication de papier
US5945357A (en) * 1997-10-07 1999-08-31 Wangner Systems Corporation Multi-layer press fabric comprising looped, knit yarns woven in an upper layer of fabric
WO2004044313A1 (fr) * 2002-11-12 2004-05-27 Tamfelt Oyj Abp Fil de sechage
WO2020027996A1 (fr) * 2018-07-30 2020-02-06 Astenjohnson International, Inc. Feutre de presse cousu doté de fils de support de couture monofilament
CN112840079A (zh) * 2018-07-30 2021-05-25 艾斯登强生国际股份有限公司 具有单丝接缝支撑纱的有缝压毡
US11619005B2 (en) 2018-07-30 2023-04-04 Astenjohnson International, Inc. Seamed press felt with monofilament seam support yarns

Also Published As

Publication number Publication date
FI832191A0 (fi) 1983-06-16
NO833525L (no) 1984-04-02
EP0106132A3 (fr) 1984-08-29
JPS5982492A (ja) 1984-05-12
BR8304376A (pt) 1984-06-12
FI832191L (fi) 1984-03-31
AU1641583A (en) 1984-04-05

Similar Documents

Publication Publication Date Title
US5277967A (en) Multilayer fabrics
KR100271914B1 (ko) 제지기의 형성 직물
EP0098612B1 (fr) Feutre pour presse
CA2174919C (fr) Feutre a support textile fin
CA2022665C (fr) Fabrication d'etoffe a fils interposes en sens travers
US4909284A (en) Double layered papermaker's fabric
EP0654559B1 (fr) Tissu de formage à deux couches ayant un nombre de fils transversaux dans la couche supérieure égal à trois fois ou plus le nombre dans la couche inférieure
KR100291622B1 (ko) 새들(saddle)에위치한횡방향의부가사를갖는제지용직물
US5857498A (en) Papermaker's double layer forming fabric
US6179965B1 (en) Papermakers wet press felt with high contact, resilient base fabric
EP0123431B2 (fr) Feutre de papeterie avec tissu-base à plusieurs couches et méthode de fabrication
US7743795B2 (en) Forming fabric having binding weft yarns
US4537816A (en) Papermakers superimposed felt with voids formed by removing yarns
EP0741204A2 (fr) Toile de presse pour papeterie
EP0269070A2 (fr) Toile de formation à couches multiples
US6073661A (en) Process for forming paper using a papermaker's forming fabric
EP1084294B1 (fr) Toile de formation double epaisseur de papetier
US4995429A (en) Paper machine fabric
US5200260A (en) Needled papermaking felt
EP0106132A2 (fr) Tissu pour papeterie comportant des fils tricotés
CA1216766A (fr) Feutre multicouche de fabrication du papier
AU699702B2 (en) Papermakers' forming fabric

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19841210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19860109

RIN1 Information on inventor provided before grant (corrected)

Inventor name: LEFKOWITZ, LEONARD R.