EP0743995B1 - Procede et systeme de production d'une bande fibreuse formee a sec - Google Patents

Procede et systeme de production d'une bande fibreuse formee a sec Download PDF

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Publication number
EP0743995B1
EP0743995B1 EP95904412A EP95904412A EP0743995B1 EP 0743995 B1 EP0743995 B1 EP 0743995B1 EP 95904412 A EP95904412 A EP 95904412A EP 95904412 A EP95904412 A EP 95904412A EP 0743995 B1 EP0743995 B1 EP 0743995B1
Authority
EP
European Patent Office
Prior art keywords
web
fibres
binder
thermobonding
bonding
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.)
Expired - Lifetime
Application number
EP95904412A
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German (de)
English (en)
Other versions
EP0743995A1 (fr
Inventor
John Hardy Mosgaard Christensen
Helmut Erwin Schilkowski
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.)
DAN-WEB MACHINERY AS
Original Assignee
Scan-Web I/S
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Filing date
Publication date
Application filed by Scan-Web I/S filed Critical Scan-Web I/S
Publication of EP0743995A1 publication Critical patent/EP0743995A1/fr
Application granted granted Critical
Publication of EP0743995B1 publication Critical patent/EP0743995B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/60—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/68—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions the bonding agent being applied in the form of foam
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper

Definitions

  • the present invention relates to a method for manufacturing a dryformed fibrous web material based on dryformed cellulose fibres with a suitable bonding.
  • the laying out of the fibres for forming a current web is usually effected by a pulp material being defibrated and admixed into an airflow, which brings the loose fibres to a distributor head above a moving, perforated forming wire, underneath which is placed a suction chamber for down suction of the fibres against the wire, where they are currently deposited as a coherent fibrous pulp web with a desired web thickness.
  • the products are typically used as liquid absorbing sheets.
  • thermobonding binding fibres As mentioned, by the binding method a bonding result is achieved, which will be best at the web surface and poorer at the centre layer of the web, but if, by a combined application of the thermobonding binding fibres it is only a question of sealing against dusting from the web, this will be achievable by coating the web with very thin surface layers of glue.
  • a surface glue will be applicable simultaneously on both sides of the already selfsupporting web, and both of the applied glue layers, which, both of them, can be extremely thin, will be hardenable by passing through a single additional heating zone with relatively low capacity.
  • EP-A-0 202 472 is an example of documents disclosing a process for producing an absorbent product by dry-forming a fibrous mat, using an incorporated amount of heat actuated fibrous binder material.
  • US-A-4 292 271 discloses the production of a dry-formed fibrous web based on the use of a bonding solution or emulsion sprayed onto first one and then the other side, however with a binder solid concentration of 15-25 %. A good internal bonding is obtained by sucking some of the bonding agent into the web.
  • the binder dispersion is applied in a foamed condition, whereby it may cover the surfaces with a minimum of dry matter therein.
  • the liquid in the setteling foam preferably settles in the intercrossing areas between the fibres rather than by a general settlement on the surfaces of the fibres, and this effect is optimum for the desired result, viz. that by use of small amounts of both liquid and dry matter a bonding of the short fibres in the surface be made, so that these partly remain in place and partly assist in sealing against extrusion of the short and unbonded fibres from the inside of the web material.
  • This remains light and porous, so that for instance it will be suited for impregnated moisture tissues.
  • a good effect is achievable by admixing only 1-2 g of binder per m 2 per side, using a waterdispersed foamed binder with only approximately 2 g dry binder pr. liter foam.
  • the foam may be generated in a conventional foaming unit, and in the foamed volumen the dry matter of the binder may then be present in an amount of only some 0,2 volumen percent.
  • the application of the foam may be effected in any suitable way, for instance by vertical, sloping or horizontal feed of the web through mating rollers, with controlled foam supply to the roller gap on both sides of the web.
  • a rolling process of the web gives an attractive result in that the surface fibres will be bonded in couched positions, whereby the surface gets a more smooth and firm character.
  • the binder can dry out and be hardened at a low energy consumption, but it can, however, take place at such a high temperature that the bonding fibres can be reactivated, and as explained further below, this can give the most extraordinary result that the tensile strength of the web can be increased to nearly the double.
  • the invention gives significant results as regards planning of manufacturing of products with desired qualifications, without said qualifications being altered by a successive extrusion of the short fibres from the products.
  • this fibre amount may be of a noticeable size, the associated result will be that it is possible to dispose in a far better way for achieving the desired qualifications of the finished product.
  • the invention is in a preferred embodiment shown schematically in the drawing.
  • a forming wire 2 is shown having a conveying stretch 4 below a pair of distributor heads 6 for supplying a mixture of loose cellulose fibres and heat thermobonding fibres to the stretch 4, on which is thus formed a loose web 8.
  • the latter is compressed between rollers 10 and then transferred to a transport wire 12 via an overhead transfer station 14.
  • the wire 12 brings the web through a heating zone 16, in which the thermobonding fibres are activated for bonding of the cellulose fibres, normally at a temperature of 130-140 °C.
  • the now stabilised and self-supporting web is taken through mating rollers 18.
  • the web, now as a product web is hereafter taken to upwinding in rolls 34 of finished products.
  • a station 20 is aftercoupled, in which the web 22, at both sides, is provided with a binder foam, preferably by the web being led down around a diversion roller 24 down to a so-called foulard-unit consisting of a pair of rollers 26 placed with adjustable spacing and with non-illustrated, upper means for adding impregnating compound 28 to the upper roller gap at both sides of the lead down web 22.
  • the supply of impregnating compound partly by adjusting the mating gap and partly by regulating the flow of the compound to a higher or lower level above the roller gab, for instance within a regulating range of 2-20 cm.
  • the supply may in this case be adjusted by the contents of dry matter in the bonding agent (as an example within 5-15%) and by adjusting the foam density, for instance within the interval 20-100 g/l.
  • the hardness/softness of the product may be controlled by choise of a binder agent with a hard or soft film, respectively, whereas the hydrophile/hydrophobe qualities of the product may be controlled by means of suitable prefoaming agents or additives.
  • the web 22 is taken onto a belt 30 through a heating tunnel 32, in which the web, preferably by means of added hot air, is heated to a quick evaporation of the aquaous part of the foam 28, whereafter the web is reeled up in the usual delivery roll 34.
  • the carrier wire 2 which is normally a woven grid wire made of intersecting threads, which, by way of the associated intersections will form local, upwardly protruding and depressed parts, respectively.
  • the fibres in the web will be extra compressed when passing the rollers 10, so that the fibres as hereby locally depressed will be extra sensitive to the welding-effect occurring in the heating zone 16.
  • this condition is weakened in that the web, while passing the transfer unit 14 is loosened somewhat, influenced by the weak tractive force and web movement, which is necessary for taking off the web from the forming wire and transferring it to the transfer wire, just as a corresponding loosening will occur at the transfer from the transfer wire to the oven wire.
  • the compressed web has a certain expansion power, and thus the originally well depressed fibres will not be all to well depressed when passing the hardening tunnel 16.
  • the binder treatment of the web will be some kind of catalyzer for the achievement of a following significantly increased tensile strength of the web material.
  • the immediate result of the invention viz. the bonding or the sealing of the 'dust fibres' under maintenance of a non-sealed surface is advantageous also in another way, as a retained amount of said fibres just within the fixed surface layers has a significant fluid spreading effect, which is of great importance in absorbing products.
  • the liquid supply during use will only appear at a sub area of the product, and for a desired absorbing capacity a superabsorbent has to be dosed in consideration of this. If the product can appear with a good distribution ability, the dosing of the superabsorbent can be minimized.
  • the aqueous foam can be added on both sides of a product having a centre layer of a superabsorbent material without said material having to become activated with water.
  • the product may have a fibre bottom layer of 70 g/m 2 , an intermediate layer of superabsorbent of 30 g/m 2 and a fibre top layer of 30 g/m 2 .
  • the invention is advantageous also as far as filter materials are concerned, where both the significantly reduced dusting and the sustained content of short fibres is of a positive effect.
  • An air laid product 60 g/m 2 , consisting of 85% woodeq cellulose fibres with largest possible content of long fibres and 15% thermobonding fibres, is foam coated in a foulard, the roller gap of which is adjusted to 0,6 mm.
  • the prefoamed binding agent is produced in the following way: Binder mix specification: 11.1% Sarpifan WRG (Stockhausen, DE) 0.2% Rohagal 10 n (Röhm GmbH, DE) 88.7% Water
  • the binding agent is foamed to a density of 20 g/l.
  • foam level in the foulard is about 4 cm, approximately 1,5 g binder (100% drystuff) each m 2 at each side of the product is added.
  • the product is dryed in a normal way, for instance at 140 C°.
  • Binder mix specification 11.1% Sarpifan WRG (Stockhausen, DE) 2.0% Stokal STA (Stockhausen, DE) 86.9 Water

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)
  • Laminated Bodies (AREA)
  • Nonwoven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Claims (16)

  1. Procédé pour fabriquer une matière en papier formée à sec par la pose successive d'une bande de fibres de cellulose sur un fil métallique et le traitement de la bande pour fournir la cohésion des fibres dans celle-ci,
    caractérisé en ce que la liaison des fibres est effectuée par une combinaison d'une activation thermique de fibres à cohésion thermique fournies par un mélange préalable dans les fibres de cellulose, et d'une application d'une dispersion de liant aux surfaces de la bande, cette application étant menée avec une partie de substance sèche de la dispersion de liant significativement en dessous de 15%, de préférence 0,5-5%, dans le but d'assurer la cohésion de courtes fibres de cellulose aux surfaces, le liant étant appliqué dans une quantité de 0,5-20 g de matière sèche par m2 de surface de bande, de préférence seulement 0,5-10 g par m2.
  2. Procédé selon la revendication 1,
    caractérisé en ce que le liant est appliqué aux surfaces de la bande après que celle-ci est stabilisée par une activité thermique des fibres à cohésion thermique, et en ce que le liant est durci par le chauffage de la bande à une température élevée de telle sorte que les fibres de cohésion sont réactivées.
  3. Procédé selon la revendication 1,
    caractérisé en ce que le liant est appliqué sous une condition en mousse, c'est-à-dire avec de l'eau/air comme support.
  4. Procédé selon la revendication 3,
    caractérisé en ce que la matière en bande, en dépit de l'application du liant aqueux, est réalisée avec une ou plusieurs couches centrales contenant ou constituant une matière superabsorbante.
  5. Procédé selon la revendication 1,
    caractérisé en ce que le liant est utilisé dans un mélange avec des pigments.
  6. Procédé selon la revendication 1,
    caractérisé en ce que, pour la fabrication d'une matière cohésive thermiquement de façon prédominante, on utilise une bande ayant 10-25% de fibres à cohésion thermique et un dosage de liant de 0,5-10 g/m2.
  7. Procédé selon la revendication 1,
    caractérisé en ce que, pour la fabrication d'une matière cohésive par un liant de façon prédominante, on utilise une bande ayant 3-7% de fibres à cohésion thermique et un dosage de liant de 5-20 g/m2.
  8. Matière en bande en papier formée à sec comprenant de façon prédominante des fibres de cellulose et préparée de façon à présenter une cohésion des fibres dans celle-ci,
    caractérisée en ce que ladite cohésion apparaít comme une combinaison :
    de fibres de liant activées thermiquement présentes avec généralement une répartition uniforme à travers toute l'épaisseur de la bande, et
    d'une disposition en surface d'un agent liant dans une quantité de 0,5-20 g/m2 au moins sur un côté de la bande.
  9. Matière en bande selon la revendication 8 et comprenant un mélange de 90-75% de fibres de cellulose et 10-25% de fibres à cohésion thermique, l'agent liant étant présent dans une quantité de 0,5-10 g/m2.
  10. Matière en bande selon la revendication 8 et comprenant un mélange de 97-93% de fibres de cellulose et 3-10% de fibres à cohésion thermique, l'agent liant étant présent dans une quantité de 5-20 g/m2.
  11. Matière en bande selon la revendication 8, dans laquelle l'agent liant est présent dans une quantité de 1-2 g/m2.
  12. Matière en bande selon la revendication 8 et apparaissant comme une couche externe dans un produit lamifié.
  13. Matière en bande selon la revendication 12, dans laquelle l'agent liant est le produit sec d'une dispersion de liant aqueuse, ledit lamifié contenant une matière superabsorbante.
  14. Matière en bande selon la revendication 8, dans laquelle l'agent liant est pigmenté.
  15. Appareil pour mettre en oeuvre le procédé selon la revendication 1, comprenant un dispositif pour l'agencement à sec de fibres sur un fil métallique pour former une bande fibreuse, et un dispositif pour l'actionnement de moyens pour la cohésion des fibres,
    caractérisé par la combinaison du dispositif de pose qui est du type qui fonctionne à partir de fibres mélangées avec des fibres à cohésion thermique, le dispositif d'actionnement étant une zone de chauffage, et en présence d'un poste pour appliquer des quantités relativement faibles de liant aux surfaces de la bande, c'est-à-dire pour rendre de façon suffisante la matière en bande finie principalement anti-poussière.
  16. Appareil selon la revendication 15,
    caractérisé en ce que le poste de liant comprend des moyens tel qu'un dispositif de foulage pour l'application du liant dans un support en mousse.
EP95904412A 1994-01-07 1995-01-06 Procede et systeme de production d'une bande fibreuse formee a sec Expired - Lifetime EP0743995B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DK2794 1994-01-07
DK002794A DK2794A (da) 1994-01-07 1994-01-07 Fremgangsmåde og anlæg til fremstilling af en bane af et tørformet fiberflor
DK27/94 1994-01-07
PCT/DK1995/000011 WO1995018886A1 (fr) 1994-01-07 1995-01-06 Procede et systeme de production d'une bande fibreuse formee a sec

Publications (2)

Publication Number Publication Date
EP0743995A1 EP0743995A1 (fr) 1996-11-27
EP0743995B1 true EP0743995B1 (fr) 1998-07-29

Family

ID=8088920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95904412A Expired - Lifetime EP0743995B1 (fr) 1994-01-07 1995-01-06 Procede et systeme de production d'une bande fibreuse formee a sec

Country Status (10)

Country Link
EP (1) EP0743995B1 (fr)
JP (1) JP3802926B2 (fr)
AT (1) ATE169074T1 (fr)
AU (1) AU705139B2 (fr)
CA (1) CA2180534C (fr)
DE (1) DE69503758T2 (fr)
DK (2) DK2794A (fr)
ES (1) ES2120717T3 (fr)
FI (1) FI111867B (fr)
WO (1) WO1995018886A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7037394B2 (en) 1994-01-07 2006-05-02 Scan-Web I/S Method and apparatus for manufacturing a dryformed fibrous web

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6407309B1 (en) 1996-02-12 2002-06-18 Scan-Web I/S Absorbent sheet or web material and a method of producing the material by dry forming
US6689242B2 (en) * 2001-03-26 2004-02-10 First Quality Nonwovens, Inc. Acquisition/distribution layer and method of making same
US6709613B2 (en) 2001-12-21 2004-03-23 Kimberly-Clark Worldwide, Inc. Particulate addition method and apparatus
DK177967B1 (da) 2013-04-10 2015-02-02 Airlaid As Absorberende airlaid produkt
JP6361209B2 (ja) * 2014-03-25 2018-07-25 セイコーエプソン株式会社 シート製造装置、シート製造方法及びシート
KR102644213B1 (ko) * 2023-12-22 2024-03-07 (주)왕보 소취 기능을 갖는 부직포, 소취 기능을 갖는 부직포의 제조 방법 및 제조 장치

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4292271A (en) * 1979-12-28 1981-09-29 American Can Company Methods of applying bonding materials onto fibrous webs
US4385954A (en) * 1980-12-19 1983-05-31 James River-Dixie/Northern, Inc. Method for applying binding agents to fibrous webs
EP0202472B1 (fr) * 1985-04-22 1989-08-09 Grain Processing Corporation Produit absorbant non laminé formé à sec

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7037394B2 (en) 1994-01-07 2006-05-02 Scan-Web I/S Method and apparatus for manufacturing a dryformed fibrous web

Also Published As

Publication number Publication date
CA2180534A1 (fr) 1995-07-13
DK169843B1 (fr) 1995-03-13
ES2120717T3 (es) 1998-11-01
AU1311395A (en) 1995-08-01
DK0743995T3 (da) 1999-05-03
FI962761A (fi) 1996-07-05
JP3802926B2 (ja) 2006-08-02
JPH09510753A (ja) 1997-10-28
CA2180534C (fr) 2000-03-14
DE69503758T2 (de) 1999-04-29
WO1995018886A1 (fr) 1995-07-13
DK2794A (da) 1995-03-13
ATE169074T1 (de) 1998-08-15
EP0743995A1 (fr) 1996-11-27
FI962761A0 (fi) 1996-07-05
AU705139B2 (en) 1999-05-13
FI111867B (fi) 2003-09-30
DE69503758D1 (de) 1998-09-03

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