EP3194645A1 - Verfahren und vorrichtung zur herstellung eines vliesstoffes - Google Patents
Verfahren und vorrichtung zur herstellung eines vliesstoffesInfo
- Publication number
- EP3194645A1 EP3194645A1 EP15757274.4A EP15757274A EP3194645A1 EP 3194645 A1 EP3194645 A1 EP 3194645A1 EP 15757274 A EP15757274 A EP 15757274A EP 3194645 A1 EP3194645 A1 EP 3194645A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- process water
- resulting
- fibers
- water
- hydroentanglement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- D04H1/492—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 processes for the production of nonwovens generally include nonwoven formation, nonwoven bonding, and then further dewatering.
- Different methods of web formation are described, for example, in WO 2007/018960 A2.
- the nonwoven can be formed in particular by a dry process, a wet process and / or an extrusion process.
- the subsequent nonwoven bonding can be effected, for example, by the so-called hydroentangling process, also known as "spunlacing" or "hydroentanglement.”
- the nonwoven fabric formed is solidified by entanglement of the fibers, the entangling being effected by swirling, in particular by the effect of focused high-pressure water jets on the nonwoven It may in this case in particular a 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. This water is recycled and usually needs to be treated to remove impurities, fiber finish and bacteria from reuse to prevent clogging of the fine water nozzles.
- the type of water treatment required depends on the starting material used. Fabrics containing wood pulp, cotton, other natural fibers or melt-blown fibers present more fine fiber scrap than fabrics made from synthetic short fibers and therefore require a more complicated filtration system.
- Water treatment systems may include 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 accumulating in the web formation process water and fibers can be reused, which are contained in the process water, which in a subsequent the hydroentanglement of the nonwoven web formed from the 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 method according to the invention for producing a nonwoven fabric is characterized in that a nonwoven is formed in a former and the resulting nonwoven material web is subsequently solidified, the nonwoven being at least partially formed in the form by a wet process consisting of the nonwoven resulting nonwoven material web is solidified by means of at least one working according to the hydroentanglement solidification, at least a portion of the resulting in the web formation by the wet process water is combined with at least a portion of the incurred in the water jet solidification process water, recovered from the resulting process water fibers again be fed 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.
- 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 guidance of the return water for reuse in the hydroentanglement brings with it the particular advantage that the risk of salting and enrichment with bacteria is reduced to a minimum by mixing with the significantly larger proportion of process water produced during the web formation by the wet process becomes.
- the hitherto required chemical and biological treatment of the return water from the hydroentanglement can be at least minimized, or it can be completely dispensed with.
- the process water arising during 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.
- resulting process water resulting process water at least partially for the recovery of fibers of a flotation, in particular a Druckentlementsflotation supplied.
- 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.
- microflotation is a special form of Druckentpressivesflotation, are used in the comparatively small air bubbles, namely air bubbles with a diameter between about 30 and about 50 ⁇ .
- 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 at least part of the process water resulting from web formation by at least part of the process water Merging of water jet solidification resulting process water means are provided for recovering fibers from the process water resulting from the combined process water, means are provided to the again recovered fibers are returned to the manufacturing process, and means are provided to at least partially return the residual resulting process water to the hydroentanglement device.
- 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
- 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 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 is a schematic partial representation of an exemplary embodiment of a device according to the invention for producing a nonwoven fabric
- FIG. 2 shows a schematic partial representation of the hydroentanglement apparatus of another exemplary embodiment of an apparatus according to the invention for producing a nonwoven fabric.
- FIG. 1 shows, in a schematic partial representation, an exemplary embodiment of a device 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. In this case, this hydroentanglement device 14 can have a pre-consolidation section and a post-consolidation section or can 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 resulting from the nonwoven formation by the wet process with the process water 26 resulting from hydroentanglement is partially supplied to a flotation device 30 for recovering 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 the impregnation of 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 the water-jet consolidation 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 the 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 the 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 between the container 48 and see the fine filter 42 arranged sewage pumps 58 and the like.
- 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 ehest 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.
- 2 shows, in a schematic partial representation, the hydroentanglement device 14 of a further exemplary embodiment of a device according to the invention for producing a nonwoven fabric.
- this Wasserstrahlverfest Trents pain 14 comprises a first portion 14 ', in which the nonwoven material web 80 is guided horizontally, a portion 14 "in which the nonwoven material web 80 is guided around a first roller 82 and another portion 14"', in the nonwoven material web 80 is guided around a further roller 84.
- the nonwoven material web 80 is acted upon in each case by means of a plurality of nozzle heads 62.
- the suction means 88 located opposite the nozzle heads 62 encompass the respective roller 82 in sections 14 'and 14" or 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 embodied, at least substantially, in particular, again as described with reference to FIG. 1.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Paper (AREA)
Abstract
Description
Claims
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 true EP3194645A1 (de) | 2017-07-26 |
| EP3194645B1 EP3194645B1 (de) | 2019-01-30 |
Family
ID=54035244
Family Applications (1)
| 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 |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3194645B1 (de) |
| CN (1) | CN107002331B (de) |
| WO (1) | WO2016041773A1 (de) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3507408B1 (de) * | 2016-09-01 | 2021-02-24 | Essity Hygiene And Health Aktiebolag | Verfahren zur herstellung von vlies |
| RU2711264C1 (ru) | 2016-09-01 | 2020-01-16 | Эссити Хайджин Энд Хелт Актиеболаг | Способ и устройство для влажной укладки нетканых материалов |
| 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)
| 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 |
-
2015
- 2015-09-02 CN CN201580050479.2A patent/CN107002331B/zh active Active
- 2015-09-02 EP EP15757274.4A patent/EP3194645B1/de active Active
- 2015-09-02 WO PCT/EP2015/070011 patent/WO2016041773A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016041773A1 (de) | 2016-03-24 |
| CN107002331A (zh) | 2017-08-01 |
| EP3194645B1 (de) | 2019-01-30 |
| CN107002331B (zh) | 2019-04-02 |
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