WO2015000685A1 - Procédé et dispositif de fabrication de non-tissé - Google Patents

Procédé et dispositif de fabrication de non-tissé Download PDF

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Publication number
WO2015000685A1
WO2015000685A1 PCT/EP2014/062619 EP2014062619W WO2015000685A1 WO 2015000685 A1 WO2015000685 A1 WO 2015000685A1 EP 2014062619 W EP2014062619 W EP 2014062619W WO 2015000685 A1 WO2015000685 A1 WO 2015000685A1
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WO
WIPO (PCT)
Prior art keywords
belt
press
roller
permeable
nonwoven
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.)
Ceased
Application number
PCT/EP2014/062619
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German (de)
English (en)
Inventor
Herbert Aust
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
Original Assignee
Voith Patent GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of WO2015000685A1 publication Critical patent/WO2015000685A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above
    • 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
    • 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
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet

Definitions

  • the present invention relates to a method and an apparatus for producing a nonwoven fabric.
  • a nonwoven web is a web of limited length fibers, filaments or cut yarns of any kind and origin, which in some way form a nonwoven (ie, a fibrous web) and in some way have been joined together.
  • Nonwoven fabrics include fiber webs made by interlacing yarns such as those used in weaving, knitting, knitting, lace making, braiding and the manufacture of tufted products. Also films and papers are not among the nonwovens.
  • nonwoven formation Known processes for the production of nonwovens generally include nonwoven formation, nonwoven bonding and subsequent dewatering.
  • Different methods of web formation are, for example, in WO
  • the nonwoven can be formed in particular by a dry process, a wet process and / or an extrusion process.
  • any combinations of such web-forming methods are also conceivable.
  • the subsequent nonwoven consolidation can be effected, for example, mechanically or by the so-called hydroentanglement process, which is also called "spunlacing". In principle, however, other conceivable.
  • hydroentanglement process the formed web is solidified by entangling the fibers, the entangling being effected by swirling, in particular by the fact that focused high-pressure water jets act on the web.
  • the formed nonwoven material web has a relatively high humidity, which subsequently has to be removed again from the material web.
  • suction tubes or suction boxes subjected to vacuum have hitherto been used following the hydroentanglement. With such suction tubes or suction boxes wanted to increase the dry content of the nonwoven web as much as possible, without sacrificing volume.
  • suction pipes or suction boxes brings a number of disadvantages.
  • the drainage performance of suction boxes is limited. They are still used because they practically do not affect the product quality parameters, whereas an alternative to mechanical dewatering would negatively impact many products. Due to the limited drainage capacity of suction pipes or
  • Suction boxes can make the subsequent dryer section a bottleneck in terms of production capacity. Currently, this problem is addressed by increasing the drying capacity. In addition, by suction pipes or
  • Suction boxes destroys or at least impairs the desired uniform moisture cross profile of the nonwoven material web, which is attributable in particular to air losses at the material web edges due to a non-constant width of the material web and to the technology of some suction tubes or boxes. lead is.
  • a non-uniform moisture cross-section can bring about limitations of the production process, in particular with regard to thermal hardening.
  • the air loss at the material web edges also brings a high energy consumption with it.
  • nonwoven composition and structure of the nonwoven material web which may also be structured or perforated, for example, the dry content of the nonwoven material web obtained after dewatering is limited.
  • the transfer belt concerned via which the nonwoven web is fed via the suction tubes or boxes, which is usually a fabric belt, a forming fabric or a nonwoven structuring and / or perforating structuring belt, come to a loss of fibers by so-called "fiber plucking".
  • the plucked fibers pollute the wastewater and are lost to the manufacturing process.
  • these fibers entail additional contamination of the water reprocessed for hydroentanglement, thus necessitating additional filtration steps and a more expensive recycle system, eg, where fresh pulp must be added.
  • Fiber losses occur mainly due to air losses at the edges of the nonwoven web, cracking and / or breakage of the fibers and suction of the fibers into the suction boxes.
  • Fiber losses occur mainly due to air losses at the edges of the nonwoven web, cracking and / or breakage of the fibers and suction of the fibers into the suction boxes.
  • the relatively large suction forces lead to fiber loss.
  • Fibers drawn into the dewatering system tend to contaminate the water used for water-jet solidification and make regeneration and filtration more difficult, particularly when using fiber pulp.
  • DE 10 2006 042 507 A1 discloses the use of a shoe press for dewatering a nonwoven material web.
  • a shoe press for dewatering a nonwoven material web.
  • the press has an extended press nip or press nip compared with a nip. Due to the relatively high pressure of the shoe press, however, it comes before the press nip the shoe press to a disturbing water retention. In addition, the relatively high pressure of the shoe press leads to a reduction in the volume of the nonwoven fabric.
  • the invention has for its object to provide a method and an apparatus of the type mentioned, with which the aforementioned problems are eliminated in the simplest and most reliable manner.
  • an efficient and cost-effective drainage of the formed nonwoven material web is to be achieved, which leads to a nonwoven material web with the largest possible volume and with a uniform moisture cross profile while avoiding a water jam.
  • the highest possible dry content of the nonwoven material web should be achieved even before the drying section, and the overall energy consumption should be reduced.
  • the fiber losses should be kept as low as possible and overall the dewatering efficiency and the drying efficiency should be increased.
  • this object is achieved by a method according to claim 1 and an apparatus according to claim 38 and in particular by a method for producing a nonwoven fabric, in which a nonwoven fabric is formed in a former and then the resulting nonwoven material web is further dehydrated, wherein the further dewatering of the nonwoven material web according to the invention comprises dewatering by means of a belt press, wherein the belt press comprises a roller around which - to form an elongated press nip or press nip - at least one inner strip resting against the inner strip and an outer pressing strip in each case are wrapped at certain wrapping angles, wherein the nonwoven material web is arranged at least in the region of the roller between the inner band and the outer press belt, and wherein the press belt - to generate a mechanical pressure on the lying between the two bands nonwoven web - is pressed with a belt tension of at least 15 kN / m to the roll and thereby the
  • Nonwoven web and the roller contacting inner band are pressed against the roller.
  • the nonwoven web is passed through a through air drying (TAD) device which comprises no more than one TAD cylinder to bring the nonwoven web to the final dry content.
  • TAD through air drying
  • At least one (endless) strip wound around the roller of the belt press is permeable to water or designed to receive water in order to absorb the water produced during the mechanical pressing occurring in the belt press and / or to be allowed to pass. Since even with the use of only a single TAD-Durchströmzylinders or TAD-Trockenzyl inder a single TAD or air drying device a higher solids content of the nonwoven material web than usual achieved and high production performance is ensured, the inventive method is very energy efficient.
  • nonwoven In the TAD (through-air drying) process, large volume flows of hot air or superheated steam are pressed by means of pressure hoods and fans through the nonwoven material web lying on the inner band and guided through a large flow-through cylinder.
  • the diameter of the throughflow cylinder of the TAD or air drying device is preferably set or selected to be less than 4 m, preferably less than 3.5 m and particularly preferably less than 3 m.
  • nonwoven is understood to mean a nonwoven fabric of low consistency obtained directly by molding, whereas a nonwoven fabric is understood as meaning a nonwoven already having a higher consistency than and having preferably solidified nonwoven immediately after shaping.
  • belt tension of the outer press belt is understood to mean the quotient of the tension applied to the press belt and the width of the press belt, in accordance with the usual use of this term. Due to this embodiment of the method results in a total more efficient, more cost-effective drainage of the formed nonwoven material web, while avoiding the previously occurring particularly in connection with a shoe press water accumulation before the press nip - compared to the use of a shoe press - a larger volume of manufactured
  • Nonwoven material web is achieved because the pressure in the extended press nip the belt press is lower than a shoe press.
  • efficient drainage with a high degree of dewatering is ensured despite the lower compacting pressure. Due to this, the thermal drying device still provided after the belt press, namely the TAD (Through Air Drying) or air drying device, requires only one flow-through cylinder and therefore only a very small amount of energy.
  • the process according to the invention due to the belt press used in comparison to the known from the prior art method a very gentle and - based on the surface of the nonwoven material web - very uniform drainage achieved, so that an impairment or even destruction of Fiber structure is reliably prevented. Due to this, fiber losses as well as contamination of the waste water are kept to a minimum. Moreover, the process according to the invention also gives an improved moisture cross profile for the nonwoven fabric formed.
  • the inventive method also makes it possible to transfer the nonwoven material web with a higher solids content to the final, in particular thermal drying device, whereby the machine speed is increased in the dryer section. Due to the reduced pressure in the belt press, the volume of the nonwoven web is reduced by no more than 10% in the dewatering. Thus, the solids content of the nonwoven web can be increased relative to the water content by more than 10% compared to the usual dewatering by suction boxes, resulting in a higher production capacity, energy consumption is reduced and the provision of additional or more expensive drying facilities is avoided. Since the nonwoven material web in the belt press is additionally additionally acted upon by the drying fluid, the efficiency of the shock absorber is improved. and even drainage without loss of volume.
  • any inert gas or aerosol can be used as the drying fluid, with good results, in particular with air and / or steam.
  • air may, for example, have ambient temperature.
  • hot air may be used as the drying fluid, preferably hot air at a temperature in a range of 50 ° C to 250 ° C, more preferably at a temperature in a range of 150 ° C to 250 ° C, and more particularly preferably at a temperature in a range of 175 ° C to 225 ° C, such as at a temperature of about 200 ° C.
  • water vapor When water vapor is used as the drying fluid, it is preferably used in a steam weight / weight ratio of the nonwoven web of up to 2 kg of steam / kg of nonwoven web and preferably in a ratio of steam weight of the nonwoven web of 0.1 to 1 kg Steam / kg nonwoven web, such as in a steam weight / weight ratio of the nonwoven web of about 0.5 kg steam / kg nonwoven web.
  • a suction roll or a blow roll can be used as a roll having an open surface.
  • the drying fluid is expediently sucked or guided, starting from a drying fluid hood, at least through the permeable outer press belt, the nonwoven material web and the permeable inner band into the suction roll.
  • the Drying fluid is expediently also sucked or guided in the tape press dehydrated water in the suction roll or the permeable inner band.
  • the suction roll is preferably provided with a negative pressure (ie a difference between atmospheric pressure and the pressure prevailing in the suction roll) in the range from 0.25 bar to 0.6 bar and particularly preferably at a negative pressure in the range of 0.30 bar to 0.55 bar, as for example, with a negative pressure of about 0.45 bar, applied.
  • the drying fluid is preferably blown from the blow roll at least through the permeable inner (endless) band, the nonwoven material web and the permeable outer (endless) band preferably in a hood.
  • the water dewatered in the belt press is expediently also blown or guided into the hood or the permeable outer band.
  • the drying fluid at a pressure in the range of 0.25 bar to 0.6 bar, and more preferably at a pressure in the range of 0.30 bar to 0.55 bar, such as with a pressure in the range of about 0.45 bar, is blown above the atmospheric pressure through the permeable inner band, through the nonwoven web and through the permeable outer press belt to the hood.
  • the pressure exerted on the nonwoven web also depends, inter alia, on the flow of drying fluid.
  • a drying fluid flow in a range of 100 through the belts m 3 / (m 2 NNIN) to 300 m 3 / (m 2 NNIN), preferably from 150 to 250 m 3 / (m 2 NNIN) and most preferably of about 210 m 3 / (m 2 NNIN) is generated.
  • roller of the belt press is still surrounded by one or more other (endless) belts in addition to the inner and the outer (endless) belt, then these other (endless) belts must also be permeable to the drying fluid, provided that the nonwoven fabric Material web in the belt press to be acted upon by such a drying fluid, which - as stated above - is particularly preferred.
  • At least the outer band (endless) serving as a press belt has a belt tension from 20 to 100 kN / m, preferably with a belt tension of 25 to 75 kN / m and particularly preferably with a belt tension of 40 kN / m to 50 kN / m is pressed against the roller of the belt press.
  • a mechanical pressure of less than 140 kPa, in particular less than 100 kPa and preferably less than 90 kPa , but of more than 30 kPa and preferably more than 45 kPa is exercised.
  • Nonwoven fabric and therefore no significant volume loss occurs. Also in view of a sufficiently good, but at the same time as gentle and uniform drainage, it is proposed in development of the invention, the residence time of the nonwoven material web in the extended press nip of the belt press on between 0.05 sec and 0.5 sec set. With such a relatively long residence time, an efficient drainage is ensured despite the relatively low pressure and the correspondingly gentle treatment of the nonwoven material web.
  • the nonwoven material web is dewatered in the belt press by at least 20%, preferably by 30 to 75% and particularly preferably by 33 to 50%.
  • this degree of dewatering denotes the percentage weight loss in the dewatering based on the total weight of the nonwoven material web prior to dewatering in the belt press.
  • the belt press with only two roll wrapping the (endless) provided bands and the nonwoven material web between these two (endless) bands and the bands is arranged touching. In this case, both the inner (endless) belt and the outer press belt contact the nonwoven web.
  • the belt press except the inner and the outer (endless) band may also be provided with at least one further (endless) band wrapping the roller in a predetermined wrap angle.
  • the at least one further (endless) band can be arranged in particular between the outer press belt and the nonwoven material web.
  • the (endless) bands wrapping the roller of the belt press comprise at least one felt belt and / or a fabric belt. It is particularly advantageous if a felt belt is used as the inner band of the belt press (endless). This also applies in particular if the nonwoven material web in the belt press is simultaneously passed through by a drying fluid and a suction roll is used as the roller of the belt press. If a blow roll is used as the roll, it is possible in particular for at least one outer (endless) band, which is viewed behind the nonwoven material web, to be provided as a felt band in the direction of flow of the drying fluid. Dewatering on a felt belt results in a substantially more uniform moisture cross profile than is the case, for example, in the case of dewatering by means of a suction box. In addition, with the drainage of a felt and the fiber losses are reduced.
  • the nonwoven material web in the belt press is preferably acted upon simultaneously by a drying fluid
  • all wound around the roller of the belt press (endless) belts for the drying fluid are made permeable or permeable.
  • At least one (endless) band wrapped around the drum of the belt press is permeable to water or adapted to receive water to absorb and / or accumulate the water produced by the mechanical press in the belt press to let pass.
  • an outer (endless) band of the belt press for example, an at least substantially smooth belt and preferably a smooth forming belt can be used.
  • a structured and / or perforated nonwoven fabric is to be produced by the method according to the invention, it is provided according to a preferred embodiment of the present invention that at least one of the nonwoven fabric Web-contacting (endless) band of the belt press is provided as a structured band by which the nonwoven web is structured and / or perforated accordingly.
  • the nonwoven material web in the belt press is preferably also subjected to a drying fluid simultaneously with the pressurization and more than two permeable (endless) belts are wound around the roller of the belt press, these (endless) belts can be viewed in particular in the direction of flow of the drying fluid
  • a permeable (endless) belt, an endless smooth forming fabric, an endless permeable fabric belt, and an endless permeable felt belt can be viewed in particular in the direction of flow of the drying fluid
  • a permeable (endless) belt, an endless smooth forming fabric, an endless permeable fabric belt, and an endless permeable felt belt can be viewed in particular in the direction of flow of the drying fluid
  • a permeable (endless) belt, an endless smooth forming fabric, an endless permeable fabric belt, and an endless permeable felt belt In principle, however, it is also possible to provide fewer or more (endless) bands and / or a different sequence of these (endless) bands.
  • the roller of the belt press is designed as a suction roll and comprise the roll-wrapping belts in the direction of flow of the drying fluid a) a permeable press belt stretched around the roll, a permeable fabric belt and a permeable felt belt, or
  • a permeable press belt stretched around the roll a permeable wire belt, a permeable fabric belt and a permeable felt belt, or
  • a permeable press belt stretched around the roll a permeable felt belt, a permeable fabric belt and a permeable felt belt, or
  • the roller of the belt press is designed as a blow roll and comprise the belts wrapping the roll in the direction of flow of the drying fluid a) a permeable press belt stretched around the roll, a permeable fabric belt and a permeable felt belt, or
  • a permeable press belt stretched around the roll a permeable wire belt, a permeable fabric belt and a permeable felt belt, or
  • a permeable press belt stretched around the roll a permeable felt belt, a permeable fabric belt and a permeable felt belt, or
  • the (endless) bands of the belt press are suitably looped around the roller over the same angle of wrap.
  • the wrap angle of the inner band and / or outer press belt around the roller in a range of 90 ° to 180 ° and in particular in a Range of 100 ° to 120 ° is selected.
  • a residence time of the nonwoven material web required for a sufficiently high and at the same time gentle, uniform dewatering is achieved in the press nip of the belt press.
  • the residence time of the nonwoven material web in the press nip at the same roll diameter and the same roll revolution speed is the greater the greater the wrap angle of the belts.
  • the diameter of the roller of the belt press is selected in a range of 500 mm to 1400 mm and preferably in a range of 750 mm to 1200 mm. Since the pressure exerted on the nonwoven web in the belt press depends inter alia on the angle of wrap of the (endless) belts and on the diameter of the roller of the belt press such a relatively large diameter a relatively long press nip and a correspondingly efficient dewatering due to the longer residence time of the nonwoven material web in the press nip. In principle, the greater the diameter of the roll, the greater the residence time of the nonwoven material web in the press nip at the same wrap angle of the belts and the same roll revolution speed.
  • the nonwoven material web can be guided through an additional dewatering press between the belt press and the thermal drying device.
  • a line force in a range of 20 kN / m to 100 kN / m, and more preferably a line force in a range of 50 kN / m to 90 kN / m is preferably produced to provide a gentle and uniform, but nevertheless to achieve strong drainage.
  • the nonwoven material web is guided in the process according to the invention in a closed train of the former at least up to the belt press and preferably up to one of these downstream Wärmrocknerseinrich- device.
  • the transfer belt is formed by the forming fabric on which the web is formed in the former.
  • the nonwoven fabric can be formed in the former by any method known to those skilled in the art, preferably by a dry method, wet method and / or an extrusion method.
  • the nonwoven may be formed in the former at least partially by a wet process, in which the fibers are in particular suspended in water and deposited on a water-permeable support.
  • the nonwoven in the former can also be aerodynamically formed at least partially.
  • the fleece is formed by depositing fibers by means of an air flow on an air-permeable base.
  • the nonwoven in the former can also be formed at least partially mechanically.
  • it may be formed, at least in part, from carded or carded piles, which are laid one on top of the other, or formed by carding machines.
  • the nonwoven may be formed, at least in part, by the so-called spunbond process in which the nonwoven is formed by depositing fibers spun from a polymer melt passing through nozzles and drawn by cold air and / or mechanically drawn becomes.
  • the nonwoven in the former can finally be formed at least partially by the so-called melt-blow process.
  • the nonwoven fabric is formed by depositing fibers which are directly spun from a polymer melt passing through nozzles and drawn to rupture by means of hot air streams.
  • the nonwoven fabric may be formed in the former not only by one of the aforementioned methods, but also, in particular, by any combination of two or more of said methods.
  • the formed web can be consolidated prior to transfer of the resulting nonwoven web into the belt press by a consolidation process which preferably comprises mechanical consolidation, hydroentanglement, and / or the like.
  • a hydroentanglement device in combination with the belt press has the particular advantage that the nonwoven material web can be transferred to the belt press in an open draw.
  • solidification is not always mandatory.
  • the formed web is solidified by entangling fibers to the nonwoven web, which is done by tumbling, in particular by focusing high pressure water jets on the web.
  • the fleece can be simultaneously structured and / or perforated by the application of water jet.
  • a hydroentanglement is not mandatory and may be omitted in particular when the nonwoven fibrous web is transferred in a closed train, such as by a single transfer belt, at least up to the belt press.
  • the material input into the former can i) at least partially from natural fibers, preferably from northern bleached kraft pulp (NBKP), hardwood pulp (LBKP), pulp from abaca fibers or cotton, ii) at least partially from artificial fibers, preferably from viscose, iii) at least partially made of synthetic fibers, preferably of polyester or polyamide, iv) at least partially made of mineral fibers, preferably glass fibers, v) at least partially made of carbon fibers and / or vi) consist of a mixture of any of the aforementioned substances.
  • the substance entry into the former can advantageously at least partially consist of fibers which are longer than 2 mm, preferably longer than 3 mm and particularly preferably longer than 4 mm.
  • the nonwoven material web is preferably produced from a plurality of different nonwoven partial webs and with variable proportions of polyester, pulp, cotton and / or the like.
  • Nonwoven material web before or after the belt press additionally guided over a vacuum applied suction roll.
  • the nonwoven fabric can still be thermally and / or chemically solidified, if this requires the subsequent use of the nonwoven fabric.
  • Another object of the present invention is a suitable in particular for carrying out the method according to the invention suitable apparatus for producing a nonwoven fabric comprising a former for forming a nonwoven and a belt press for subsequent further dewatering of the nonwoven web formed from the formed nonwoven.
  • the belt press comprises a roller around which - to form an extended press nip - at least one inner band resting against the roller, in particular an endless belt, and an outer press belt, in particular an endless belt, are wound in a certain angle of wrap, the nonwoven fabric Material web at least in the region of the roller between the inner band and the press belt can be arranged and preferably arranged, wherein the press belt - For generating a mechanical pressure on the lying between the two (endless) bands nonwoven fabric web - pressed with a belt tension of at least 15 kN / m to the roller and preferably pressed, whereby both the nonwoven material web and the Roller contacting inner (endless) belt pressed against the roller.
  • a through-air drying (TAD) device Downstream of the belt press is a through-air drying (TAD) device, which includes no more than one TAD cylinder, to bring the nonwoven web to the final dry content.
  • TAD through-air drying
  • the diameter of the throughflow cylinder of the TAD or air drying device is preferably less than 4 m, preferably less than 3.5 m and particularly preferably less than 3 m.
  • the (endless) bands of the belt press are designed as compared to drying fluid and preferably against air and / or water vapor permeable (endless) bands that simultaneously with the pressing of the nonwoven material web against the roll or simultaneously with the mechanical pressurization of the nonwoven material web by the belt press, preferably by a pressure difference between the roller and the outer press belt, a drying fluid can be flowed through the permeable (endless) belts and the nonwoven material web wherein the roller of the belt press is adapted to discharge or receive the drying fluid having an open surface.
  • At least one (endless) band wrapped around the drum of the belt press is permeable to water or adapted to receive water to absorb and / or accumulate the water produced by the mechanical press in the belt press to let pass.
  • air or water vapor may be provided as the drying fluid, in the case of the use of air having this ambient temperature or as hot air, in particular with a temperature in a range of 50 ° C. to 250 ° C., preferably at a temperature in a range from 150 ° C to 250 ° C, and more preferably at a temperature in a range from 175 ° C to 225 ° C, such as at a temperature of about 200 ° C, may be provided.
  • water vapor is used as the drying fluid, it can be used, in particular, in a steam weight / weight ratio of the nonwoven material web of up to 2 kg steam / kg nonwoven material web and preferably from 0.1 to 1 kg steam / kg nonwoven material web, such as 0 , 5 kg steam / kg nonwoven web, are used.
  • the device is designed such that one of the above-mentioned drying fluids can be flowed through the permeable belts and the nonwoven material web.
  • the roller of the belt press is designed as a suction roll, wherein it is proposed in this embodiment in development of the inventive idea that the suction roll is designed so that the drying fluid preferably from a drying fluid hood at least by the permeable outer press belt, the Nonwoven material web and the permeable inner (endless) tape can be sucked into the suction roll.
  • at least one (endless) belt is preferably designed such that, in addition to the drying fluid, the water dehydrated in the belt press can also be sucked or guided into the suction roll or the permeable inner belt.
  • the suction roll is advantageously designed so that it can be acted upon with a negative pressure in the range of 0.25 bar to 0.6 bar, preferably from 0.30 bar to 0.55 bar and more preferably from about 0.45.
  • the roller of the belt press is designed as a blow roll, wherein the roll in this embodiment particularly preferably designed so that the drying fluid from the blow roll at least by the permeable inner (endless) band, the nonwoven material web and the permeable outer Press belt can be preferably blown to a hood.
  • at least one (endless) belt is preferably designed so that, in addition to the drying fluid, the water drained in the belt press can also be blown or guided into the hood or the permeable outer belt.
  • the device is preferably designed such that the drying fluid is at a pressure in the range of 0.25 bar to 0.6 bar and particularly preferably from 0.30 bar to 0.55 bar from the blow roll through the permeable inner ( Endless) tape, the nonwoven web and the permeable outer press belt is blown.
  • at least the outer press belt with a belt tension of 20 to 100 kN / m, preferably with a belt tension of 25 to 75 kN / m and particularly preferably with a belt tension of 40 to 50 kN / m can be pressed against the roller of the belt press.
  • the belt press is designed so that a mechanical pressure of less than 140 kPa, preferably less than 100 kPa and more preferably less, on the nonwoven material web in the belt press or in the extended nip of the belt press than 90 kPa on the nonwoven web is exercisable.
  • the band press may also be provided with at least one further (endless) band wrapping around the roller at a predetermined wrap angle.
  • the at least one further (endless) band is preferably arranged or arranged between the outer press belt and the nonwoven material web.
  • the (endless) bands wrapping around the roller of the belt press comprise at least one felt belt and / or at least one fabric belt.
  • the inner (endless) belt wrapping around the roller of the belt press can be designed as a felt belt. If the nonwoven material web in the extended press nip of the belt press, which is preferred as outlined, is also traversed by a drying fluid in addition to the pressurization, it may be advantageous to use a permeable (preferably in contact) direction behind the nonwoven material web and preferably touching it. Endless) tape should be designed as a felt belt.
  • At least one (endless) band wrapped around the drum of the belt press is permeable to water or adapted to receive water to absorb and / or accumulate the water produced by the mechanical press in the belt press to let pass.
  • the roller of the belt press can be designed in particular as a suction fan as a blower roll.
  • the roller of the belt press is designed as a suction roll and comprise the roll-wrapping belts in the direction of flow of the drying fluid a) a permeable press belt stretched around the roll, a permeable fabric belt and a permeable felt belt, or
  • a permeable press belt stretched around the roll a permeable wire belt, a permeable fabric belt and a permeable felt belt, or
  • a permeable press belt stretched around the roll a permeable felt belt, a permeable fabric belt and a permeable felt belt, or
  • the roller of the belt press is designed as a blow roll and comprise the belts wrapping the roll in the direction of flow of the drying fluid
  • a permeable press belt stretched around the roll a permeable wire belt, a permeable fabric belt and a permeable felt belt, or
  • a permeable press belt stretched around the roll a permeable felt belt, a permeable fabric belt and a permeable felt belt, or
  • at least one nonwoven fabric web contacting (endless) band of the belt press is designed as a structured band through which the nonwoven material web is structurally structured and / or perforated.
  • the device according to the invention comprise the roller of the belt press wraps (endless) bands, especially in the flow direction of the drying fluid considered a permeable (endless) band, an endless smooth forming fabric, an endless fabric belt and an endless felt belt.
  • the (endless) bands of the belt press are looped around the roller over the same wrap angle.
  • the wrap angle of the inner tape and / or outer press belt around the roll is in a range of 90 ° to 180 °, and more preferably in a range of 100 ° to 120 ° ° is. It is particularly advantageous if the diameter of the roller of the belt press is in a range of 500 mm to 1400 mm and in particular in a range of 750 mm to 1200 mm.
  • the residence time of the nonwoven material web in the press nip formed in the belt press is adjustable within a range of 0.05 to 0.5 sec.
  • the device is preferably designed so that in the belt press a drying fluid flow in a range of 100 m 3 / (min " m 2 ) to 300 m 3 / (min " m 2 ), preferably from 150 to 250 m 3 / (min m 2 ) and more preferably of about 210 m 3 / (min m 2 ) is generated.
  • the nonwoven material web is guided in a closed train of the former at least up to the belt press and preferably up to one of these downstream drying device.
  • the transfer belt is formed by the forming fabric on which the web is formed in the former. If the nonwoven material web is guided in a closed train at least up to the belt press, then a hydroentanglement can be dispensed with.
  • the nonwoven material web may additionally be provided before or after the belt press be guided over a vacuum applied suction roll.
  • an additional dewatering press may be provided between the belt press and the thermal dryer, preferably a line force in a range of 20 kN / m to 100 kN / m and preferably a line force in a range of 50 kN / m to 90 kN / m can be generated.
  • the former is designed such that in this a nonwoven fabric by a dry process, a wet process and / or an extrusion process can be produced.
  • Fig. 1 is a schematic representation of a conventional apparatus for producing nonwovens
  • Fig. 2 is a schematic representation of a first exemplary
  • Fig. 3 is a schematic representation of another exemplary embodiment
  • Fig. 4 is a schematic representation of another exemplary embodiment
  • 1 shows a schematic representation of a conventional apparatus 10 for the production of nonwovens with a former 12, a hydroentanglement device 14, a plurality of suction tubes or suction boxes 16 comprehensive drainage device 18 and two thermal drying devices 20, namely two TAD or air drying devices, an immersion 22nd for loading the dried nonwoven material web with a finishing agent and a winding device 24.
  • the nonwoven fabric is formed by the wet process with a low consistency.
  • the web is formed in a former 28 of a subject apparatus 30 for producing nonwoven webs by a particular method or combination of such methods.
  • the formed web is, for example, consolidated mechanically, by means of a hydroentanglement device 32 and / or the like, and then further dehydrated the solidified nonwoven material web.
  • an amendment is not always mandatory.
  • the further dewatering of the nonwoven material web formed from the formed nonwoven material comprises a dewatering by means of a belt press 34 with a roller 36 around which at least one inner endless belt contacting the roller for forming an extended press nip 38 over a respective wrap angle.
  • band 40 and serving as a press belt outer endless belt 42 is looped.
  • the nonwoven may be formed in particular by a dry process, a wet process and / or an extrusion process.
  • the outer endless belt 42 of the belt press 34 which serves as a press belt, is stretched around the roll 36 or against this roll with a belt tension of at least 15 kN / m for generating a mechanical pressure on the nonwoven material web lying between the two endless belts 40, 42 36 pressed.
  • this press belt 42 By this press belt 42, the nonwoven fabric web and the roller 36 touching inner endless belt 40 are pressed against the roller 36.
  • a drying fluid is forced through the endless belts 40, 42 and the nonwoven web by creating a pressure differential between the roller 36 and the outer press belt 42
  • the endless belts 40, 42 in the present case are permeable to the drying fluid, ie permeable to the drying fluid.
  • the roller 36 of the belt press 34 is designed to discharge or receive the drying fluid having an open surface. It may in particular be formed by a suction or blowing roll.
  • At least one endless belt 40, 42 looped around the drum of the belt press is permeable to water or adapted to receive water to absorb the water generated by the mechanical pressing occurring in the belt press 34 and / / or to be allowed to pass.
  • air or water vapor can be used as the drying fluid, it being possible to use air at ambient temperature or also hot air as the drying air.
  • the drying fluid starting from a drying fluid hood 44, is sucked or guided at least through the permeable outer endless belt 42, the nonwoven material web and the permeable inner endless belt 40 into the suction roll.
  • the drying fluid from the blow roll is blown into the hood 44 at least through the permeable inner endless belt 40, the nonwoven web, and the permeable outer endless belt 42.
  • the belt press 34 can be provided, for example, with only two endless belts 40, 42 wrapping the roller 36.
  • the nonwoven material web lying between these endless belts 40, 42 is in this case touched by the two endless belts 40, 42.
  • the belt press 34 can also be provided, in addition to the inner and outer endless belts 40, 42, with at least one further endless belt which wraps around the roller 36 over a certain wrap angle.
  • at least one such further endless belt can be arranged, for example, between the outer endless belt 42 and the nonwoven material web.
  • the endless belts 40, 42 wrapping the roller 36 of the belt press 34 preferably comprise at least one felt belt and / or at least one fabric belt.
  • the roller 36 of the belt press 34 looping inner endless belt 40 may be provided a felt belt.
  • the nonwoven material web in the belt press 34 is additionally preferably accompanied by a drying fl uid. id acted upon, at least one felt belt is provided behind the nonwoven material web at least in the direction of flow of the drying fluid.
  • the nonwoven material web in the belt press 34 which is preferred, in addition to a drying fluid is applied, as already mentioned, all wrapped around the roller 36 of the belt press 34 endless belts 40, 42 for the drying fluid permeable or permeable.
  • an outer endless belt 42 of the belt press 34 for example, an at least substantially smooth belt, in particular smooth forming belt, can be used.
  • At least one endless belt 40, 42 of the belt press 34 contacting the nonwoven material web is designed as a structured belt, by means of which the nonwoven material web is structured and / or perforated accordingly.
  • the endless belts 40, 42 wrapping the roller 36 of the belt press 34, in particular in the direction of flow of the drying fluid comprise a permeable endless belt, an endless smooth forming fabric, an endless fabric belt and an endless felt belt.
  • fewer or more endless belts and / or the endless belts may be provided in a different order than the one just mentioned.
  • the belts wrapping the roller 36 preferably comprise, viewed in the direction of flow of the drying fluid a) a permeable press belt stretched around the roller 36, a permeable fabric belt and a permeable felt belt, or
  • the belts wrapping the roller 36 preferably comprise viewed in the direction of flow of the drying fluid
  • a permeable press belt stretched around the roll 36 a permeable wire belt, a permeable fabric belt and a permeable felt belt, or c) a permeable press belt stretched around the roll 36, a permeable felt belt, a permeable fabric belt and a permeable felt belt, or d) a permeable felt press belt stretched around the roller 36, a permeable fabric belt and a permeable felt belt
  • the endless belts 40, 42 of the belt press can in particular be wound around the roller 36 over the same wrap angle.
  • the nonwoven material web Downstream of the belt press 34, the nonwoven material web is guided by a TAD or air drying device 46 which comprises not more than one TAD throughflow cylinder or TAD drying cylinder (see also FIG. 3).
  • the diameter of the drying cylinder of the TAD or air drying device is preferably less than 4 m, preferably less than 3.5 m and more preferably less than 3 m.
  • the nonwoven fabric Material web are dried in such a thermal drying device in particular to the final dry content.
  • the nonwoven fabric may advantageously be formed with a low consistency having a solids content of in particular 0.01 to 0.1% on a smooth forming fabric or a structured forming fabric which structurally and / or perforates the nonwoven fabric.
  • a so-called Schrägsiebformer or the like can be used.
  • the fleece can also be structured and / or perforated at the same time by the optionally provided hydroentanglement device 32.
  • Such a hydroentanglement device 32 is accordingly preferred, in particular in those cases in which the nonwoven or the nonwoven material web is additionally to be structured and / or perforated.
  • the nonwoven material web before or after the belt press 34 be guided over a vacuum applied suction roll.
  • the schematic representation of the first exemplary embodiment of the inventive device 30 for producing nonwovens comprises a former 28, a hydroentanglement device 32, a belt press 34 and a thermal drying device 46, which is a TAD or Heildrocknungs adoptedseinrich- tion acts.
  • this TAD drying unit preferably contains only a single drying cylinder or throughflow cylinder.
  • the nonwoven web is formed, for example, by the wet process with a low consistency on a forming fabric 48, which at the same time as Transfer belt for transferring the nonwoven to the hydroentanglement device 32 is used. As indicated at "50", the nonwoven fabric can be formed with an additional layer.
  • the web formed in the former 28 is transferred to the hydroentangling apparatus 32 in a closed loop by the forming wire 48.
  • the consolidated nonwoven web 52 is transferred from the hydroentanglement device 32, for example, in an open draw to the belt press 34, which is shown here with only two endless belts 40, 42 wrapped around the roller 36, for example. From this belt press 34, the nonwoven material web 52 is transferred, for example, in an open train to the TAD drying device 46. Simultaneously with the mechanical pressurization of the nonwoven material web 52 by the belt press 34, a drying fluid is preferably pressed through the endless belts 40, 42 permeable in this case and through the nonwoven material web 52 by a corresponding pressure difference.
  • the roller 36 has an open surface, wherein, as already mentioned, it can be embodied in particular as a suction or as a blower roll.
  • the hood 44 intended for dispensing or receiving the drying fluid is arranged above the roller 36.
  • the roller 36 may be associated with a scraper 62.
  • the hydroentanglement device 32 is not mandatory. However, it can be provided in particular in the case that the nonwoven material web 52 is additionally structured and / or perforated. Such structuring or perforation can take place, inter alia, via the hydroentanglement device 32.
  • the belt press 34 can also be provided with at least one structuring and / or perforating the nonwoven material web 52. be provided with the structural band, which is again wrapped around the roller 36.
  • FIG. 3 shows a schematic representation of a further exemplary embodiment of the device according to the invention with an additional suction roll 56 connected upstream of the belt press 34 and an additional dewatering press 58 connected downstream of the belt press.
  • the respective device 30 for the production of nonwovens again comprises a former 28, a belt press 34 and no more than one TAD or air drying device 46.
  • the former 28 in the present case is, for example, a wet-method former for forming a non-woven web.
  • a hydroentanglement device 32 which, as mentioned, however, is not mandatory.
  • the consolidated nonwoven material web is guided, together with a flat forming fabric 54 structured for structuring and / or perforating the nonwoven material web, and the outer endless belt 42 of the belt press 34, around an additional suction roll 56 and in its region against the inner endless belt Pass 40 of the belt press 34.
  • the additional suction roll 56 like the hydroentangling device 32, is not mandatory.
  • the outer endless belt 42 of the belt press 34 again serves as a press belt 42 over which the inner endless belt 40 and the nonwoven web lying between it and the outer endless belt 44 are pressed against the roller 36 of the belt press 34. Simultaneously with the mechanical pressure loading of the nonwoven material web by the belt press 34 is preferred by a corresponding pressure difference again pressed a drying fluid through the endless belts 40, 42 and the intermediate nonwoven material web. At least in this case, the endless belts 40, 42 looped around the roller 36 of the belt press 34 are permeable or permeable to the drying fluid.
  • the roller 36 is again designed with an open surface, wherein it may in particular be formed again by a suction or blower roll.
  • the dehumidifying or receiving hood 44 is disposed below the roller 36.
  • the drying fluid may in particular be air or steam. In the former case, air with ambient temperature or even hot air can be used.
  • the inner endless belt 40 of the belt press 34 can be designed in particular as a felt belt.
  • a dewatering press 58 which is designed in the present case as a roller press.
  • such an additional dewatering press 58 is also not mandatory. As can be seen from Fig.
  • the forming belt 54 acting as a transfer belt is arranged in the region of the belt press 34 between the inner endless belt 40 and the outer endless belt 42 of the belt press 34, wherein the nonwoven material web in the extended press nip 38 of the belt press 34 between the inner endless belt 40 and the Formierieb 54 comes to rest.
  • the nonwoven material web In the press nip of the additional dewatering press 58 is the nonwoven material web between the inner endless belt 40 of the belt press 34 and the same time as The nonwoven material web is then transferred to the drying cylinder 60 of the forming belt 54 via the forming fabric 54, which is not more than a thermal TAD or air drying device 46.
  • the forming fabric 54 which simultaneously serves as a transfer belt, can be designed to be flat or to structure and / or perforate the nonwoven material web as a structural band.
  • the hydroentanglement unit 32 is particularly preferable in the case where patterning or perforation of the nonwoven fabric web is intended. Incidentally, this hydroentanglement device 32 as well as the additional suction roller 56 and the additional dewatering press 58 are purely optional.
  • the forming fabric 54 which also serves as a transfer belt, is also permeable, ie permeable to the drying fluid which optionally additionally impinges the nonwoven material web in the belt press 34.
  • This drying fluid thus flows in the belt press 34 optionally both through the two endless belts 40, 42 of the belt press 34 and the nonwoven material web and through the forming fabric 54.
  • the direction of the drying flow depends on whether the roller 36 of the belt press 34 is functioning as Suction roll or is designed as a blower roll.
  • the drying fluid-absorbing hood 44 is arranged below the roller 36 of the belt press 34, for example.
  • the hood 44 is arranged above the roller 36 of the belt press 34 for dispensing or receiving the drying fluid.
  • an inner endless belt 40 and serving as a press belt 42 outer endless belt 42 is wound around the roller 36 of the belt press 34.
  • the loop of the inner endless belt 40 is arranged in the present case below the loop of serving as a press belt outer endless belt 42.
  • the inner endless belt 40 may in particular be a felt belt again.
  • the drying fluid flow is directed from top to bottom or from bottom to top, depending on whether the roller 36 is designed as a suction roller or as a blow roller.
  • the nonwoven web of material to be dewaxed lies again between the inner endless belt 40 and the outer endless belt 42.
  • the additional loading of the nonwoven web with drying fluid is optional. It is particularly preferred when the
  • Nonwoven material web should be structured and / or perforated simultaneously.
  • a scraper 62 assigned to the roller 36 of the belt press 34 can again be seen.
  • the respective endless belts 40, 42 are guided in the same wrap around the roller 36 of the belt press 34, wherein the wrap angle is expediently slightly larger than the suction or blowing zone 64 of the roller of the belt press 34 , LIST OF REFERENCES

Landscapes

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

Abstract

L'invention concerne un procédé de fabrication d'un non-tissé dans lequel une nappe de fibres est façonnée dans une forme et la bande continue de matériau non-tissé ainsi obtenue est ensuite soumise à un égouttage. Selon l'invention, l'égouttage de la bande continue de matériau non-tissé comprend l'égouttage au moyen d'un filtre-presse à bandes. Le filtre-presse à bandes comprend un cylindre autour duquel au moins une bande intérieure en contact avec le cylindre, de préférence réalisée sous la forme d'une bande sans fin, et une bande pressante extérieure, de préférence réalisée sous la forme d'une bande sans fin, s'enroulent de façon à former une emprise allongée. La bande continue de matériau non-tissé est disposée au moins dans la zone du cylindre située entre la bande intérieure et la bande pressante extérieure. Pour générer une pression mécanique sur la bande continue de matériau non-tissé insérée entre les deux bandes, la bande pressante est comprimée sur le cylindre à une tension de bande d'au moins 15 kN/m afin de comprimer ainsi la bande continue de matériau non-tissé et la bande intérieure contre le cylindre. L'invention concerne en outre un dispositif adapté pour mettre en œuvre le procédé. En aval du filtre-presse à bandes, la bande continue de matériau non-tissé passe dans un système de séchage TAD ("through air drying") ou de séchage à l'air, comprenant au maximum un cylindre TAD ou un cylindre à passage d'air, afin d'amener la bande continue de matériau non-tissé à sa teneur finale en matière sèche. L'invention concerne en outre un dispositif adapté pour mettre en œuvre le procédé.
PCT/EP2014/062619 2013-07-04 2014-06-17 Procédé et dispositif de fabrication de non-tissé Ceased WO2015000685A1 (fr)

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DE102013213063 2013-07-04

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2018050588A1 (fr) * 2016-09-14 2018-03-22 Voith Patent Gmbh Procédé pour fabriquer un non-tissé obtenu par voie humide
CN109112724A (zh) * 2018-10-12 2019-01-01 杭州诺邦无纺股份有限公司 一种耐洗抑菌水刺无纺材料及其制备方法
EP4067549B1 (fr) 2021-03-29 2023-01-25 Andritz Küsters GmbH Installation et procédé de consolidation des couches comprenant des fibres en une bande de non-tissé
EP4067548B1 (fr) 2021-03-29 2023-03-22 Andritz Küsters GmbH Installation de consolidation des couches comprenant des fibres en une bande de non-tissée

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US20060042049A1 (en) * 2004-08-27 2006-03-02 Petersen Jens Erik T Manufacture of a multi-layer fabric
US20070068645A1 (en) * 2003-09-26 2007-03-29 Voith Paper Patent Gmbh Machine for the manufacture of a fiber material web
WO2013009256A1 (fr) * 2011-07-12 2013-01-17 Metso Paper Karlstad Ab Procédé et machine permettant de produire une nappe fibreuse structurée en papier

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
US20070068645A1 (en) * 2003-09-26 2007-03-29 Voith Paper Patent Gmbh Machine for the manufacture of a fiber material web
US20060042049A1 (en) * 2004-08-27 2006-03-02 Petersen Jens Erik T Manufacture of a multi-layer fabric
WO2013009256A1 (fr) * 2011-07-12 2013-01-17 Metso Paper Karlstad Ab Procédé et machine permettant de produire une nappe fibreuse structurée en papier

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018050588A1 (fr) * 2016-09-14 2018-03-22 Voith Patent Gmbh Procédé pour fabriquer un non-tissé obtenu par voie humide
US11578439B2 (en) 2016-09-14 2023-02-14 Voith Patent Gmbh Method of manufacturing a wet-laid nonwoven fabric
EP3512993B1 (fr) 2016-09-14 2024-01-10 Voith Patent GmbH Procédé pour fabriquer un non-tissé obtenu par voie humide
CN109112724A (zh) * 2018-10-12 2019-01-01 杭州诺邦无纺股份有限公司 一种耐洗抑菌水刺无纺材料及其制备方法
EP4067549B1 (fr) 2021-03-29 2023-01-25 Andritz Küsters GmbH Installation et procédé de consolidation des couches comprenant des fibres en une bande de non-tissé
EP4067548B1 (fr) 2021-03-29 2023-03-22 Andritz Küsters GmbH Installation de consolidation des couches comprenant des fibres en une bande de non-tissée
US12043933B2 (en) 2021-03-29 2024-07-23 Andritz Kuesters Gmbh System for bonding layers comprising fibers to form a nonwoven web
EP4067548B2 (fr) † 2021-03-29 2026-02-18 Andritz Küsters GmbH Installation de consolidation des couches comprenant des fibres en une bande de non-tissée

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