EP3798342B1 - Ligne de fabrication de non-tissé - Google Patents

Ligne de fabrication de non-tissé Download PDF

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Publication number
EP3798342B1
EP3798342B1 EP20397512.3A EP20397512A EP3798342B1 EP 3798342 B1 EP3798342 B1 EP 3798342B1 EP 20397512 A EP20397512 A EP 20397512A EP 3798342 B1 EP3798342 B1 EP 3798342B1
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EP
European Patent Office
Prior art keywords
web
drying device
manufacturing line
forming
drying
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EP20397512.3A
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German (de)
English (en)
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EP3798342A1 (fr
Inventor
Gian Luca Polosa
Avinav G. Nandgaonkar
Pramod U. Shanbhag
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.)
Suominen Oyj
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Suominen Corp
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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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • 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
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay

Definitions

  • the invention relates to a manufacturing line, according to the preamble to Claim 1, for a nonwoven fabric, and correspondingly a method for manufacturing the nonwoven fabric.
  • nonwoven fabric wiping products Numerous different types of properties are required of nonwoven fabric wiping products. They must have sufficient absorbency, strength, and wear resistance for the intended use. In addition, they must be sufficiently biodegradable, so as to not lead to long-term environmental loading.
  • Decorative patterning is made in nonwoven-fabric products, and the patterns can also transmit information in several different ways, as is described, for example, in international patent application WO 2019/115875 .
  • wet-spreading is a web-forming process used in the manufacture of nonwoven fabric, which is a rapid, economical, and environmentally-friendly method. All the water used in wet spreading can be filtered and reused. In wet spreading, the initial operations are similar to those in paper manufacture.
  • the web formed by wet spreading requires binding to achieve a sufficient strength. If the web material contains thermoplastic material, heat can be used to partly melt this material and thus reinforce the web. All thermoplastic materials are not, however, biodegradable, which limits their use as web binders. The web can also be bound chemically with the aid of binders.
  • Spunlacing is a generally used method to reinforce the web in nonwoven fabric manufacture.
  • the fibres are needled with the aid of high-pressure water jets.
  • spunlacing can be used to form a permanent pattern in the web surface.
  • the process can then be called water patterning.
  • Water patterning can also be formed on the web's surface using a patterning roll, to which the web is transferred from the spunlacing unit. Water patterning using a patterning roll is described in EP application number 3715515 .
  • Document EP 373974 discloses a strong, highly absorbent hard finished nonwoven toweling fabric consisting of wood pulp and textile fibers essentially free from added binders, which is prepared by forming a wet-laid web of a blend of fibers containing 30 to 80 weight percent wood pulp and 20 to 70 weight percent staple length fibers subjecting the fibers in the wet-laid web to hydroentanglement, and embossing the hydroentangled web.
  • the embossed fabric may be apertured or essentially nonpertured, and may be made lint resistant or water repellant or both.
  • the fabric may be converted into pads or towels having medical and surgical applications, or into household cloths, food service wipes, industrial machinery wipes or the like.
  • Document EP 2692924 presents a process for manufacturing a nonwoven fabric material, the process comprising: a) laying on a support at least one layer of a biodegradable material in the form of long fibres or continuous filaments; b) hydroentangling the said layers and drying the hydroentangled material; c) calendering the dried material of step b) to create on the material a calendered pattern which is able to provide a balanced ratio of MD/CD average tensile strength to the nonwoven fabric material, the said balanced ratio of MD/CD average tensile strength being in the range of 1:1 and 4:1, wherein the calendering step is performed with a calender having ribs evenly alternating with grooves so that to define a calendering pattern thereon.
  • the web can be patterned using a calender or belt.
  • a drawback with belt patterning is the long time needed to change the belt.
  • the belt patterning unit is long, thus increasing the length of the manufacturing line.
  • a drawback with patterning performed using a patterning drum is the equipment's high price.
  • a drawback with patterning formed by calendering is, in turn, that the patterning vanishes when the nonwoven fabric wets, particularly if the nonwoven fabric does not contain thermoplastic material.
  • the intention of the present invention is to create a new type of nonwoven-fabric manufacturing line and method, by which the problems described above can be reduced.
  • a manufacturing line for a nonwoven fabric, which comprises a forming device to form a fibre web on a moving forming base, a spunlacing device to reinforce the web, at least one first drying device to dry the web, and a calender to form patterning in the web.
  • the manufacturing line comprises at least one second drying device to dry the calendered web. The second drying device is located after the calender in the direction of travel of the web.
  • the patterning of a nonwoven-fabric product manufactured on a manufacturing line according to the invention does not disappear when the nonwoven-fabric product becomes wet, even though the patterning of the nonwoven-fabric product is made by calendering.
  • the manufacturing line can be short, because patterning is made by calendering, and a long belt-patterning unit is not needed.
  • a calender is also considerably cheaper than the equipment used in drum patterning.
  • a nonwoven fabric is a fabric-like material, which is made by combining fibres in set or random directions, using friction and/or cohesion and/or adhesive. Papers, woven, tufted, sewn, or felted fabrics are not included in the term nonwoven fabrics. Continuous filament fibres, as well as short and long fibres, which can be both natural and artificial fibres, are used in nonwoven fabrics.
  • the manufacturing line 1 comprises a formation device 2 for forming a fibre web 3 on a moving forming base 4.
  • the forming device 2 is of the type wet-forming devices, for example a headbox, by which a watery fibre suspension is fed to the forming base 4.
  • the forming device 2 can be of the type dry-forming devices, such as a carding device or an air-spreading device.
  • the fibre web 3 forming on the forming base 4 by carding or air-spreading must then be moistened at a later processing stage, for example by spunlacing.
  • the forming base 4 is a forming wire.
  • the fibre web 3 can contain biodegradable material.
  • the manufacturing line 1 comprises a spunlacing unit 5 to reinforce the web.
  • the spunlacing unit 5 comprises at least one nozzle 6 to direct a high-pressure water jet 7 through the web 3.
  • the spunlacing unit 5 comprises several nozzles 6 arranged consecutively, for example 3-15 nozzles 6 arranged consecutively.
  • the manufacturing line 1 comprises at least one first drying device 8, 10 to dry the web 3.
  • the first drying device 8, 10 is located after the spunlacing unit 5 in the direction of travel of the web 3 and/or at the spunlacing unit 5.
  • the first drying device 8, 10 is arranged to dry the web to a moisture content of 20-50 percent by weight, typically 30-40 percent by weight.
  • the drying device 10 after the spunlacing unit 5 can be a mechanical dryer, a suction dryer, a through-blowing dryer, or an oven dryer, such as, for example, a foulard, a suction dryer, a cylinder dryer, or an omega-dryer.
  • the direction of travel of the web 3 is marked in the drawing with an arrow 9.
  • a suction dryer 8 operating by vacuum is located at the spunlacing unit 5. If the suction dryer 8 is sufficiently powerful, the desired moisture content of the web 3 can be achieved without a separate dryer 10 after the spunlacing unit 5. Alternatively an additional dryer can be located in connection with the suction dryer 8, for example another suction dryer, in order to achieve the desired moisture content.
  • the manufacturing line 1 comprises a patterning device to form three-dimensional patterning in the web 3.
  • the patterning device is a calender 12, which comprises two rotating rolls 13, which are arranged in a mutual nip contact and form the nip between which the web 3 is arranged to run.
  • the web 3 is shaped by being pressed in the nip between the rolls 13.
  • heat can be used in addition to compression to shape the web 3.
  • the rolls 13 is a patterned surface to pattern the web 3.
  • the calender 12 is located after the first drying device 8, 10, in the direction of travel of the web 3.
  • the web 3 arriving at the calender 12 has been dried by the first drying device 10 to a moisture content of 20-50 percent by weight, typically 30-40 percent by weight.
  • the manufacturing line 1 also comprises at least one second drying device 14 to dry the calendered web 3.
  • the second drying device 14 is located after the calender 12 in the direction of travel of the web 3.
  • the calender 12 is thus between the first drying device 8, 10 and the second drying device 14 in the direction of travel of the web 3.
  • the second drying device 14 is typically a mechanical dryer, through-blowing dryer, or oven dryer, such as, for example, a foulard, cylinder dryer, or omega dryer.
  • the second drying device 14 is arranged to dry the web 3 to its final moisture content, i.e. the moisture content at which the web is brought to the rolling machine 11.
  • the second drying device 14 is the last drying device on the manufacturing line 1.
  • the manufacturing line 1 also comprises a rolling machine 11 to reel the web 3 onto a roll.
  • the rolling machine 11 is located after the second drying device 14 in the direction of travel of the web 3.
  • the rolling machine 11 is the last device on the manufacturing line 1.
  • the manufacturing line 1 operates as follows.
  • a fibre suspension is fed to a moving forming base 4, typically a wire, and a web 3 is formed.
  • a forming device 2 such as wet-spreading, carding, or air-spreading, is used to feed the fibre suspension to the base 4.
  • the web 3 is spunlaced by directing one or more high-pressure water jets 7 onto the web 3.
  • Spunlacing is performed using a spunlacing unit 5, which comprises at least one nozzle 6, from which a water jet 7 is directed onto the web 3.
  • a spunlacing unit 5 which comprises at least one nozzle 6, from which a water jet 7 is directed onto the web 3.
  • a suction dryer 8 At the spunlacing unit 5 there is a suction dryer 8, by which water is removed from the web 3.
  • the web 3 is dried in the first drying stage using at least one drying device 8, 10.
  • the web is dried to a moisture content of 30-40 percent by weight.
  • the web is calendered and three-dimensional patterning is formed in it by the calender 12.
  • the calender 12 comprises two rolls 13 arranged in nip contact 13, the web 13 being led through the nip between them.
  • the web 3 is shaped by pressing it in the nip between the rolls 13.
  • Heat can be used in addition to compression to shape the web 3.
  • the moisture content of the web 3 brought to the calender 12 is 20-50 percent by weight, typically 30-40 percent by weight.
  • the web 3 After calendering the web 3 is dried in a second drying stage using a second drying device 14. In the second drying stage, the web 3 is dried to its final moisture content. The web 3 is calendered between the first and second drying stages. After the second drying stage the web 3 is reeled onto a roll by a rolling machine 11.
  • the cellulose molecule chains in the wet nonwoven fabric create short-lived hydrogen bonds. At the same time, these molecule chains slide to overlap each other, which increases the number of their hydrogen bond points.
  • the hydrogen bonds are broken. This permits the easier rearrangement of the molecule chains.
  • the pressure caused by calendering reduces the overlapping of the chains and thus also reduces the number of hydrogen bond points. When the pressure of the calendering ceases, the nonwoven fabric can form these hydrogen bonds normally. Because there are fewer of these points, fewer hydrogen bonds are also formed. As the fabric is dried rapidly after this, the molecule chains are practically unable to move on top of each other, so that new hydrogen bond points cannot arise.
  • the nonwoven fabric made using the solution according to the invention contains natural fibres and/or regenerated fibres.
  • the fibres are bound together by spunlacing.
  • the nonwoven fibre contains at least two different areas, the first area is compressed when wet and the second area is not compressed. In the dry nonwoven fabric there are more hydrogen bond points in the second area than in the first area.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Woven Fabrics (AREA)

Claims (12)

  1. Ligne de fabrication de non-tissé (1), qui comprend :
    - un dispositif de formation (2) pour former une toile de fibres (3) sur une base formant une toile mobile (4),
    - un dispositif de filage entrelacé (5) pour renforcer la toile (3),
    - au moins un premier dispositif de séchage (8, 10) pour sécher la toile (3), et
    - une machine à calandrer (12) pour former des motifs dans la toile (3),
    caractérisé en ce que la ligne de fabrication (1) comprend au moins un deuxième dispositif de séchage (14) pour sécher la toile calandrée (3), lequel deuxième dispositif de séchage (14) est situé après la machine à calandrer (12) dans le sens de déplacement de la toile (3).
  2. Ligne de fabrication (1) selon la revendication 1, caractérisé en ce que le premier dispositif de séchage (8, 10) est agencé pour sécher la toile (3) arrivant à la machine à calandrer (12) avec une teneur en humidité de 20-50 pourcent en poids, typiquement 30-40 pourcent en poids.
  3. Ligne de fabrication (1) selon la revendication 1 ou 2, caractérisé en ce que le dispositif formant une toile (2) est un dispositif humide de diffusion par exemple une caisse de tête, qui est agencée pour alimenter une suspension de fibre aqueuse sur la base de formation (4).
  4. Ligne de fabrication (1) selon l'une quelconque des revendications ci-dessus, caractérisé en ce que la base formant une toile (4) est un treillis.
  5. Ligne de fabrication (1) selon l'une quelconque des revendications ci-dessus, caractérisé en ce que le premier dispositif de séchage (8, 10) est situé, dans le sens de déplacement de la toile (3), après l'unité de filage entrelacé (5) et/ou au niveau de l'unité de filage entrelacé (5).
  6. Ligne de fabrication (1) selon l'une quelconque des revendications ci-dessus, caractérisé en ce que le deuxième dispositif de séchage (14) est le dernier dispositif de séchage sur la ligne de fabrication (1).
  7. Procédé pour fabriquer un non-tissé, comprenant :
    - la formation d'une toile en fibres (3) par un dispositif de formation (2) sur une base formant une toile mobile (4),
    - le renforcement de la toile (3) par filage entrelacé,
    - le séchage de la toile avec au moins un premier dispositif de séchage (8, 10), et
    - la formation de motifs dans la toile (3) par machine à calandrage,
    caractérisé en ce que dans la ligne de fabrication (1), la toile (3) est séchée par le premier dispositif de séchage (8, 10) à une teneur en humidité de 20-50 pourcent, et en ce que la toile est séchée par au moins un deuxième dispositif de séchage (14) pour sécher la toile calandrée (3), lequel deuxième dispositif de séchage (14) est situé après le dispositif à calandrer (12) dans le sens de déplacement de la toile (3).
  8. Procédé selon la revendication 7, caractérisé en ce que le premier dispositif de séchage (8, 10) est agencé pour sécher la toile (3) arrivant à la machine à calandrer (12) à une teneur en humidité de 20-50 pourcent en poids, typiquement 30-40 pourcent en poids.
  9. Procédé selon la revendication 7 ou 8, caractérisé en ce que la toile (3) est formée par un dispositif humide de diffusion, par exemple une caisse de tête, qui est agencée pour alimenter une suspension aqueuse de fibres sur la base de formation (4).
  10. Procédé selon l'une quelconque des revendications 7-9 ci-dessus, caractérisé en ce que la base formant une toile (4) est un treillis.
  11. Procédé selon l'une quelconque des revendications 7-10 ci-dessus, caractérisé en ce que le premier dispositif de séchage (8, 10) est situé dans le sens de déplacement de la toile (3), après l'unité de filage entrelacé (5) et/ou au niveau de l'unité de filage entrelacé (5).
  12. Procédé selon l'une quelconque des revendications 7-11 ci-dessus, caractérisé en ce que le deuxième dispositif de séchage (14) est le dernier dispositif de séchage sur la ligne de fabrication (1).
EP20397512.3A 2019-09-30 2020-09-29 Ligne de fabrication de non-tissé Active EP3798342B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20194131 2019-09-30

Publications (2)

Publication Number Publication Date
EP3798342A1 EP3798342A1 (fr) 2021-03-31
EP3798342B1 true EP3798342B1 (fr) 2022-04-13

Family

ID=73037919

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Application Number Title Priority Date Filing Date
EP20397512.3A Active EP3798342B1 (fr) 2019-09-30 2020-09-29 Ligne de fabrication de non-tissé

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EP (1) EP3798342B1 (fr)
ES (1) ES2920500T3 (fr)

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655136A1 (de) 1976-12-04 1978-06-08 Freudenberg Carl Fa Nassvlies und verfahren zu dessen herstellung
EP0357474A1 (fr) 1988-07-28 1990-03-07 James River Corporation Of Virginia Tissu fibreux absorbant l'eau
EP0373974A2 (fr) 1988-12-15 1990-06-20 Fiberweb North America, Inc. Procédé de préparation d'une étoffe non tissée fortement absorbante
EP0624209A1 (fr) 1992-02-03 1994-11-17 Minnesota Mining & Mfg Feuilles et rubans de materiaux non tisses et procedes de fabrication.
EP1206927A1 (fr) 2000-11-16 2002-05-22 Johnson & Johnson Inc. Serviette hygiénique avec volets lateraux raides
DE10050512A1 (de) 2000-10-11 2002-05-23 Freudenberg Carl Kg Leitfähiger Vliesstoff
DE69811646T2 (de) 1997-03-31 2003-12-04 Kimberly Clark Co Dispergierbarer vliesstoff und verfahren zur herstellung
EP1524350A1 (fr) 2003-10-17 2005-04-20 Reifenhäuser GmbH & Co. Maschinenfabrik Laminés à fibres et leurs procédés de fabrication
WO2005106116A1 (fr) 2004-04-29 2005-11-10 A. Celli Paper S.P.A. Procede et dispositif permettant de produire du papier mince
DE102006042507A1 (de) 2006-09-07 2008-03-27 Andritz Küsters GmbH & Co. KG Verfahren und Vorrichtung zur Behandlung einer ein Vlies umfassenden Warenbahn
EP2692924A1 (fr) 2012-07-31 2014-02-05 Suominen Corporation Non-tissés calandrés

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019115875A1 (fr) * 2017-12-11 2019-06-20 Suominen Corporation Matériau non tissé ayant des informations codées, procédé de codage d'informations sur un matériau non tissé et système d'utilisation correspondant

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655136A1 (de) 1976-12-04 1978-06-08 Freudenberg Carl Fa Nassvlies und verfahren zu dessen herstellung
EP0357474A1 (fr) 1988-07-28 1990-03-07 James River Corporation Of Virginia Tissu fibreux absorbant l'eau
EP0373974A2 (fr) 1988-12-15 1990-06-20 Fiberweb North America, Inc. Procédé de préparation d'une étoffe non tissée fortement absorbante
EP0624209A1 (fr) 1992-02-03 1994-11-17 Minnesota Mining & Mfg Feuilles et rubans de materiaux non tisses et procedes de fabrication.
DE69811646T2 (de) 1997-03-31 2003-12-04 Kimberly Clark Co Dispergierbarer vliesstoff und verfahren zur herstellung
DE10050512A1 (de) 2000-10-11 2002-05-23 Freudenberg Carl Kg Leitfähiger Vliesstoff
EP1206927A1 (fr) 2000-11-16 2002-05-22 Johnson & Johnson Inc. Serviette hygiénique avec volets lateraux raides
EP1524350A1 (fr) 2003-10-17 2005-04-20 Reifenhäuser GmbH & Co. Maschinenfabrik Laminés à fibres et leurs procédés de fabrication
WO2005106116A1 (fr) 2004-04-29 2005-11-10 A. Celli Paper S.P.A. Procede et dispositif permettant de produire du papier mince
DE102006042507A1 (de) 2006-09-07 2008-03-27 Andritz Küsters GmbH & Co. KG Verfahren und Vorrichtung zur Behandlung einer ein Vlies umfassenden Warenbahn
EP2692924A1 (fr) 2012-07-31 2014-02-05 Suominen Corporation Non-tissés calandrés

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
RUSSELL S.J.: "Handbook of Nonwovens", 1 January 2007, pages: 256 - 257, XP093016925

Also Published As

Publication number Publication date
ES2920500T3 (es) 2022-08-04
EP3798342A1 (fr) 2021-03-31

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