EP3194645B1 - Verfahren und vorrichtung zur herstellung eines vliesstoffes - Google Patents

Verfahren und vorrichtung zur herstellung eines vliesstoffes Download PDF

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Publication number
EP3194645B1
EP3194645B1 EP15757274.4A EP15757274A EP3194645B1 EP 3194645 B1 EP3194645 B1 EP 3194645B1 EP 15757274 A EP15757274 A EP 15757274A EP 3194645 B1 EP3194645 B1 EP 3194645B1
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EP
European Patent Office
Prior art keywords
water
process water
resulting
woven
fibres
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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.)
Active
Application number
EP15757274.4A
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German (de)
English (en)
French (fr)
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EP3194645A1 (de
Inventor
Thomas Weigert
Kai PÖHLER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Truetzschler GmbH and Co KG
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Voith Patent GmbH
Truetzschler GmbH and Co KG
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    • 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
    • D04H1/492—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 by fluid jet
    • 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
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • 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
    • D21F1/66—Pulp catching, de-watering, or recovering; Re-use of pulp-water

Definitions

  • the present invention relates to a method and an apparatus for producing a nonwoven fabric.
  • a nonwoven fabric is a fabric made of fibers that has been solidified in different ways.
  • nonwoven formation generally includes nonwoven formation, nonwoven bonding, and then further dewatering.
  • Different methods of web formation are, for example, in WO 2007/018960 A2 described.
  • the nonwoven can be formed in particular by a dry process, a wet process and / or an extrusion process.
  • DE 102009031635 A1 and US 2003/213108 A1 disclose methods for producing wet laid and water jet needled nonwovens and the corresponding devices.
  • WO 2011/015172 A1 and GB 2264512 A disclose devices for processing the resulting process water in the water jet needling.
  • US 4081319 A and EP 0643164 A1 disclose device for processing the resulting in the wet laying of nonwovens or paper process water.
  • the subsequent nonwoven bonding can be done, for example, by the so-called hydroentangling process, also called “spunlacing” or “hydroentanglement”.
  • hydroentangling process also called "spunlacing” or "hydroentanglement”.
  • a series of fine, non-divergent jets are directed onto the nonwoven web supported by a carrier system, which carrier system may comprise, for example, a circulating screen or a porous roller.
  • carrier system may comprise, for example, a circulating screen or a porous roller.
  • the number, dimension and pressure level of the hydroentangling nozzles will depend on the type of fibers being processed and the extent of hydroentanglement.
  • a hydroentanglement system requires a certain amount of water. Typically, the required amount is in a range of 10 m 3 / h to 300 m 3 / h.
  • Water treatment systems may contain any combination of the following, depending on the type of fibers used and the level of contamination: air separators, clarifiers or flash flotation systems, sand filters, belt filters, pre-filters, filter cartridges, bag filters, deionization units, heat exchangers, and bacterial treatment systems.
  • the loss of fibers typically ranges between 3 to 10%. Depending on the capacity of the installation in question, this loss may amount to a total of up to 300 kg / h. Synthetic fibers are relatively expensive. The cost of such fibers is currently in the range between 2 and 3 € / kg.
  • the invention has for its object to provide a method and an apparatus of the type mentioned, in which both fibers from the resulting in the web formation process water and fibers can be reused, which are contained in the process water, in a subsequent Hydroentanglement of the resulting from the nonwoven web material web is obtained.
  • the water treatment for the recirculated water jet hardening water is to be at least kept as low as possible fresh water use at least.
  • the inventive method for producing a nonwoven fabric is characterized in that formed in a former a nonwoven and the resulting nonwoven web is then solidified, wherein the web is formed in the former at least partially by a wet process, the nonwoven fabric resulting from the nonwoven Material web is solidified by means of at least one working after the hydroentanglement solidification, at least a part of the resulting in the web formation by the wet process water is combined with at least a portion of the incurred in the hydroentanglement process water, from the resulting process water recovered fibers are fed back to the manufacturing process and the remaining resulting process water is at least partially reused for hydroentanglement.
  • nonwoven is understood to mean a nonwoven fabric of low consistency obtained directly by the formation, whereas a nonwoven fabric is to be understood as meaning a nonwoven already having a certain or relatively higher consistency.
  • the wet process in accordance with the customary use of this term, is understood to mean a process in which in particular, the fibers are suspended in water and deposited on a water-permeable support.
  • the common leadership of the return water for reuse in hydroentanglement brings with it the particular advantage that the risk of salting and accumulation with bacteria is reduced to a minimum by mixing with the much larger proportion of incurred in the web formation by the wet process water.
  • the previously required chemical and biological treatment of the backwater from the hydroentanglement can be minimized, or it can be dispensed with altogether.
  • the process water occurring in the hydroentanglement is diluted or refreshed by the process water obtained during the web formation by the wet process.
  • the process water cycle in question thus contains in particular up to 10 times larger quantities of water than with the usual hydroentanglement (spunlacing).
  • the combined water supply also results in correspondingly lower investment costs and a smaller space requirement.
  • the flotation or pressure-release flotation is a physical-chemical separation process which serves to separate the solid from the liquid phase, in which substances dispersed or suspended in the water are transported to the water surface by adhering gas bubbles and removed therefrom.
  • the resulting process water for the recovery of fibers is preferably supplied to a microflotation.
  • Such a microflotation is a special form of pressure-release flotation in which comparatively small air bubbles are used, namely air bubbles with a diameter of between about 30 and about 50 ⁇ m.
  • the fibers recovered from the resulting process water can advantageously be recycled to the production process at least partially immediately after the stock preparation or at least partially entered into a separate fiber strand at the beginning of the production process.
  • the treatment of the remaining resulting process water intended for reuse for hydroentanglement preferably comprises filtering, in particular filtering by means of a police filter, a sand filter, a belt filter, a belt filter with integrated flotation, a sand filter with integrated flotation and / or a fine filter.
  • the device according to the invention for producing a nonwoven fabric accordingly comprises a former for forming a nonwoven fabric and at least one device for subsequent solidification of the nonwoven material web formed from the formed nonwoven, wherein the former comprises a hydroformer in which the nonwoven is at least partially formed by a wet process in that the solidification device comprises at least one hydroentanglement device in which the web of nonwoven material resulting from the web is solidified by the hydroentanglement process, means are provided for covering at least a portion of the process water resulting from the wet process by at least part of the water jet strengthening Merged process water, means for recovering fibers from the process water resulting from the combined process water are provided, means are provided to the crawlge recover fibers to the manufacturing process, and means are provided to at least partially recycle the residual resulting process water to the hydroentanglement apparatus.
  • the former comprises a hydroformer in which the nonwoven is at least partially formed by a wet process
  • the solidification device comprises at least one hydroentanglement device in which the web of nonwoven material
  • the process water resulting from the combination of the process water arising during the web formation by the wet process with the process water resulting from the hydroentanglement is preferably at least partly for the recovery of fibers of a flotation device, in particular a Druckentpressivesflotations issued supplied.
  • the flotation device preferably comprises a microflotation device.
  • means may also be provided for the treatment of the remaining resulting process water intended for reuse for hydroentanglement.
  • means are provided for thickening the fibers recovered from the resulting process water.
  • the apparatus preferably comprises means for recycling the fibers recovered from the resulting process water, at least partially immediately after the stock preparation, and / or for introducing the fibers recovered from the resulting process water at least partially into a separate fiber strand at the beginning of the production process.
  • the device may also comprise means for at least partially reintroducing the fibers recovered from the resulting process water into the beginning of the production process by feeding already dried recycled fibers.
  • the means for treating the remaining resulting process water intended for reuse for hydroentanglement optionally optionally comprise filter media, in particular at least one police filter, at least one sand filter, at least one belt filter at least one sand filter with integrated flotation and / or at least one fine filter.
  • filter media in particular at least one police filter, at least one sand filter, at least one belt filter at least one sand filter with integrated flotation and / or at least one fine filter.
  • Fig. 1 shows a schematic partial representation of an exemplary embodiment of an apparatus 10 according to the invention for producing a nonwoven fabric.
  • the apparatus 10 comprises a former 12 for forming a nonwoven fabric and a device 14 for subsequently solidifying the nonwoven material web formed from the formed nonwoven fabric.
  • the former 12 comprises a hydroformer, in particular a Schrägsiebformer in which the web is formed by a wet process.
  • the solidification device 14 comprises a hydroentanglement device in which the nonwoven web of material resulting from the web is solidified by the hydroentanglement process.
  • this hydroentanglement device 14 may have a pre-consolidation section and a post-consolidation section or be provided as a uniform solidification device.
  • the device 10 comprises means 16 for combining at least part of the process water produced by the wet process in the web formation with at least part of the process water resulting from the hydroentanglement, means 18 for the recovery of fibers from the of Merging process water resulting process water, means 20 to recycle the recovered fibers back to the manufacturing process, and means 22, at least partially return the remaining resulting process water to the hydroentanglement device 14.
  • the process water 28 resulting from the combination of the process water 24 produced during the web formation by the wet process with the process water 26 resulting from the hydroentanglement is partially fed to a flotation device 30 for the recovery of fibers, which in the present case comprises, for example, a microflotation device.
  • the device 10 comprises means 32 for the treatment of the remaining resulting process water 34 intended for reuse for hydroentanglement.
  • the device 10 may in particular also comprise means 36 for thickening the fibers recovered from the resulting process water 28.
  • the device 10 may be provided with means to at least partially recycle the fibers recovered from the resulting process water 28 into the manufacturing process immediately after stock preparation, to at least partially input the recovered fibers from the resulting process water 28 into a separate fiber strand at the beginning of the manufacturing process, and / or at least partially reintroducing the fibers recovered from the resulting process water 28 back into the beginning of the manufacturing process by feeding already dried recycled fibers.
  • the means 32 for the treatment of the remaining process water 34 intended for reuse for hydroentanglement may include, inter alia
  • Filtering means in particular a police filter 38, a sand filter 40, a band filter, a sand filter with integrated flotation and / or a fine filter 42 include.
  • the conditioning means 32 further comprises a clarifying water tank 44 disposed between the flotation device 30 and the police filter 38, a buffer tank 46 connected between the police filter 38 and the sand filter 40, a container 48 connected between the sand filter 40 and the fine filter 42, the non-filtered one Fresh water 50 can be supplied to a fine filter 42 downstream water tank 52 and a water tank 52 downstream low-pressure pump 54.
  • a clarifying water tank 44 disposed between the flotation device 30 and the police filter 38
  • a buffer tank 46 connected between the police filter 38 and the sand filter 40
  • a container 48 connected between the sand filter 40 and the fine filter 42
  • the non-filtered one Fresh water 50 can be supplied to a fine filter 42 downstream water tank 52 and a water tank 52 downstream low-pressure pump 54.
  • Fig. 1 between the sewage tank 44 and the police filter 38 provided process water pumps 56 and disposed between the container 48 and the fine filter 42 sewage pumps 58 and the like to recognize.
  • the hydroentanglement device 14 comprises nozzle heads 62 acted upon by high-pressure pumps 60, police filters 86 arranged between the high-pressure pumps 60 and the nozzle heads 24 and suction means 88 located opposite the nozzle heads 24.
  • the process water from the former 12 first passes into a container 64 (white water I).
  • the overflow from this container 64 is guided into a further container 66, in which the process water 24, 26 are brought together.
  • the process water 26 from the hydroentanglement initially passes into a suction water container 68, which is connected upstream of the container 66, or it can be guided directly into the container 66.
  • a portion of the collected water in the container 64 is returned via a vane pump 70 to the former.
  • the overflow from the container 66 (white water II) passes into a further container 72 (white water III), the additional white water from the thickening 36 can be supplied.
  • the process water from the container 72 is finally fed to the flotation device 30.
  • the fiber recovery means 18 comprises a couch broke 74 upstream of the thickening means 36 to which process water from the flotation means 30 is supplied.
  • the thickening means 36 is followed by a wet broke chest 76, from which the recovered fibers are removed and, in particular, fed to a machine chest 78.
  • the process water 26 can for example also be pressed directly into the flotation device 30.
  • FIG. 2 shows in a schematic partial representation of the hydroentanglement device 14 of a further exemplary embodiment of a device according to the invention for producing a nonwoven fabric.
  • this hydroentanglement device 14 comprises a first section 14 ', in which the nonwoven material web 80 is guided horizontally, a section 14 ", in which the nonwoven material web 80 is guided around a first roller 82 and a further section 14"', in the nonwoven material web 80 is guided around a further roller 84.
  • the nonwoven material web 80 is in each case acted upon by a plurality of nozzle heads 62.
  • the suction means 88 located opposite the nozzle heads 62 comprise in each case the respective roller 82 or sections 14 'and 14". 84 associated suction means, wherein the rollers 82, 84 may be designed in particular in each case as a suction roller.
  • the device in question may be at least substantially in particular again designed as described with reference to Fig. 1 has been described.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Paper (AREA)
EP15757274.4A 2014-09-18 2015-09-02 Verfahren und vorrichtung zur herstellung eines vliesstoffes Active EP3194645B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014218724 2014-09-18
PCT/EP2015/070011 WO2016041773A1 (de) 2014-09-18 2015-09-02 Verfahren und vorrichtung zur herstellung eines vliesstoffes

Publications (2)

Publication Number Publication Date
EP3194645A1 EP3194645A1 (de) 2017-07-26
EP3194645B1 true EP3194645B1 (de) 2019-01-30

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ID=54035244

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Application Number Title Priority Date Filing Date
EP15757274.4A Active EP3194645B1 (de) 2014-09-18 2015-09-02 Verfahren und vorrichtung zur herstellung eines vliesstoffes

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EP (1) EP3194645B1 (zh)
CN (1) CN107002331B (zh)
WO (1) WO2016041773A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2016421324B2 (en) 2016-09-01 2019-11-21 Essity Hygiene And Health Aktiebolag Process and apparatus for wetlaying nonwovens
WO2018041356A1 (en) * 2016-09-01 2018-03-08 Sca Hygiene Products Ab Process for producing nonwoven
DE102016217481A1 (de) 2016-09-14 2018-03-15 TRüTZSCHLER GMBH & CO. KG Verfahren zur Herstellung eines nassgelegten Vliesstoffes
JP7089736B2 (ja) * 2017-02-07 2022-06-23 ユニチカ株式会社 スパンレース不織布の製造方法

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
US4081319A (en) * 1976-04-06 1978-03-28 The Dexter Corporation Continuous papermaking process
US5009747A (en) * 1989-06-30 1991-04-23 The Dexter Corporation Water entanglement process and product
GB2264512A (en) * 1992-02-28 1993-09-01 Lantor Hydro-entangled non-woven fabric
GB9317817D0 (en) * 1993-08-27 1993-10-13 Wiggins Teape Group The Ltd Papermaking process and apparatus for use therewith
US7326318B2 (en) * 2002-03-28 2008-02-05 Sca Hygiene Products Ab Hydraulically entangled nonwoven material and method for making it
US20070018364A1 (en) 2005-07-20 2007-01-25 Pierre Riviere Modification of nonwovens in intelligent nips
DE102009031635A1 (de) * 2009-07-03 2011-01-05 Fleissner Gmbh Vliesstoff sowie Verfahren und Vorrichtung zur Herstellung eines solchen Vliesstoffes
DE102009036296A1 (de) * 2009-08-06 2011-02-10 Fleissner Gmbh Versorgungseinrichtung zum Betreiben einer Wasserstrahlvernadelungsanlage
CN202038938U (zh) * 2011-05-03 2011-11-16 杭州萧山航民非织造布有限公司 用于生产水刺非织造材料的废水回收循环利用装置

Non-Patent Citations (1)

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Also Published As

Publication number Publication date
EP3194645A1 (de) 2017-07-26
CN107002331A (zh) 2017-08-01
WO2016041773A1 (de) 2016-03-24
CN107002331B (zh) 2019-04-02

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