WO2015000690A1 - Procédé et dispositif compact de fabrication de non-tissé - Google Patents

Procédé et dispositif compact de fabrication de non-tissé Download PDF

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Publication number
WO2015000690A1
WO2015000690A1 PCT/EP2014/062625 EP2014062625W WO2015000690A1 WO 2015000690 A1 WO2015000690 A1 WO 2015000690A1 EP 2014062625 W EP2014062625 W EP 2014062625W WO 2015000690 A1 WO2015000690 A1 WO 2015000690A1
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WO
WIPO (PCT)
Prior art keywords
belt
press
roller
material web
nonwoven
Prior art date
Application number
PCT/EP2014/062625
Other languages
German (de)
English (en)
Inventor
Herbert Aust
Kai PÖHLER
Egon FRIESENHAHN
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 WO2015000690A1 publication Critical patent/WO2015000690A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/425—Cellulose series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0272—Wet presses in combination with suction or blowing devices
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper

Definitions

  • the present invention relates to a method 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.
  • Nonwovens and technical paper products are typically produced in installations with a high-density oblique wire former, followed by a transfer area, which makes it possible to transfer the nonwoven web of material formed from the nonwoven web without an open draw into a dryer section.
  • the removal of the nonwoven material web from the forming fabric of the former takes place in the region and with the assistance of a suction tube or box or a suction roll.
  • the consistency in the headbox of the former is usually in the range of 0.01 to 0.1%.
  • a TAD through air drying
  • air drying device is typically used as the drying device of the dryer section. puts. Suction boxes are usually installed in the transfer area to increase the dry content of the nonwoven web prior to entering the dryer section.
  • the previous production facilities have the particular disadvantage that the thermal energy consumption in the dryer section is very high and the quality of the nonwoven fabric produced is impaired, which is particularly due to the fact that until the nonwoven material web enters the thermal drying device, typically TAD or air drying device, the drying section can not be maintained a uniform moisture cross profile.
  • the furnish in the former may be at least partially made from natural fibers such as northern bleached kraft pulp (NBKP), hardwood pulp (LBKP), abaca fiber or cotton pulp, at least partially from man-made fibers such as viscose, at least partially from synthetic fibers such as polyester or Polyamide, at least partially made of mineral fibers, such as glass fibers, at least partially made of carbon fibers and / or a mixture of any of the aforementioned substances, wherein the fibers used can be up to 40mm long.
  • natural fibers such as northern bleached kraft pulp (NBKP), hardwood pulp (LBKP), abaca fiber or cotton pulp
  • man-made fibers such as viscose
  • synthetic fibers such as polyester or Polyamide
  • mineral fibers such as glass fibers
  • carbon fibers and / or a mixture of any of the aforementioned substances wherein the fibers used can be up to 40mm long.
  • the wide range of products produced by the relevant production equipment or machines includes, inter alia, Teabag paper, overlay papers, coffee filter paper for coffee pads, wrapping paper and / or the like.
  • synthetic fibers are used to meet the requirements of quality and technical properties.
  • nonwoven formation generally includes nonwoven formation, nonwoven bonding and subsequent dewatering.
  • Different methods of web formation are, 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. In principle, any combinations of such web-forming methods are also conceivable.
  • the subsequent nonwoven consolidation can be done, for example, by the so-called hydroentanglement process - which is also called "spunlacing".
  • the formed nonwoven is solidified by entanglement of the fibers, wherein the entangling is effected by swirling, in particular by acting on the nonwoven focused high-pressure water jets.
  • 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.
  • Nonwoven fabric composition and structure of the nonwoven material web which may also be structured or perforated, for example, is limited to the dry content of the nonwoven material web obtained after dewatering.
  • the transfer belt concerned via which the nonwoven web is fed via the suction tubes or boxes, which is usually a cloth 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. 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.
  • 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 viewed in the web running direction, has an extended press nip or press nip, as compared to 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 dewatering of the formed nonwoven material web should be achieved while avoiding water congestion before it enters the thermal drying device.
  • the most uniform possible moisture profile of the material web should be maintained until the nonwoven material web enters the thermal drying device.
  • the device necessary for carrying out the method should be as compact as possible or space-saving.
  • this object is achieved by a method having the features of claim 1 and a device suitable in particular for carrying out the method having the features of claim 44.
  • the invention provides a process for the production of a nonwoven fabric in which a nonwoven is formed in a former, then the further dewatered nonwoven material web is further dehydrated and the further dewatered nonwoven web is subsequently dried by means of a thermal drying device, in particular to the final dry content.
  • the further dewatering of the nonwoven material web comprises the dewatering by means of a belt press which comprises a roller around which at least one inner band resting against the roller and an outer press belt are wound to form a press nip or press nip extended in the running direction of the nonwoven material web.
  • the nonwoven material web, together with at least the inner band and the press belt therebetween, is guided through the extended press nip of the belt press.
  • the press belt is pressed against the roller with a belt tension of at least 15 kN / m in order to press the nonwoven material web and the inner belt against the roller, wherein the belt press is arranged in the running direction of the nonwoven material web immediately before the thermal drying device.
  • the inner band and the outer press belt are, in particular, circulating endless belts, the nonwoven material web, as already mentioned, being guided together with at least these belts through the extended press nip of the belt press.
  • nonwoven in accordance with the technical use of this term, is understood to mean a nonwoven fabric having a still low consistency, whereas nonwoven fabric is to be understood as already a higher consistency and optionally an already solidified nonwoven.
  • 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.
  • an arrangement of the belt press directly from the thermal drying device is understood to mean that the belt press is arranged directly upstream, ie in the web running direction, of the drying device, ie in close proximity to the drying device, without being between the belt press and the drying device is a further device of the device.
  • this arrangement of the belt press directly from the thermal drying device means that the Belt press of the thermal drying device at its two points closest to each other by not more than 0.5 m, preferably by not more than 0.3 m and preferably not more than 0.1 m apart, if it is in the thermal drying device is a TAD cylinder and / or a Yankee cylinder, or not more than 1, 5 m, preferably not more than 1, 2 m and preferably not more than 1, 0 m apart if the thermal drying device is a drying cylinder and / or a flat bed oven.
  • Nonwoven fibrous web maintained.
  • the belt press is arranged in the web running direction immediately before the thermal drying device, in addition, the total space required is reduced, so that the device provided for carrying out the method in the construction is correspondingly compact.
  • the solution according to the invention can be integrated very simply, in particular in production plants operating according to the so-called wet-laying process ("wet lay process").
  • wet lay process wet lay process
  • a corresponding retrofitting is possible in particular without a relocation of the dryer section or other machine components, such as, for example, the wiping device, and without changes to the building accommodating the installation or machine in question.
  • the required dry content of the nonwoven material web is also achieved practically without affecting the volume and the porosity of the material web. While avoiding the so far If desired, a larger volume of the nonwoven fabric can be achieved, if desired, in comparison with the use of a shoe press, since the pressure in the extended press nip of the belt press is lower than in the case of a shoe press. However, as a result of the longer residence time of the nonwoven material web in the nip compared to the use of a shoe press, efficient drainage with a high degree of dewatering is ensured despite the lower compacting pressure.
  • a thermal drying device which may still be provided after the belt press, such as, for example, a TAD ("through air drying") device, a flat bed furnace, a dryer section with at least one drying cylinder or a Yankee cylinder, requires only a very small amount Amount of energy, which reduces pollution.
  • a TAD through air drying
  • a flat bed furnace a dryer section with at least one drying cylinder or a Yankee cylinder
  • a very small amount Amount of energy which reduces pollution.
  • due to the belt press used in comparison to the known from the prior art methods and devices due to the belt press used in comparison to the known from the prior art methods and devices a very gentle and - based on the surface of the nonwoven material web - very uniform drainage achieved, so that a Deterioration or even destruction of the fiber structure is reliably prevented. As a result, fiber losses and contamination of the waste water are kept to a minimum.
  • the solution according to the invention 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 machinability in the dryer section is increased. 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 material web can be increased by more than 10% relative to the water content in comparison to the usual dewatering by suction boxes, resulting in a higher production capacity, the energy consumption is reduced and the provision of additional or more expensive drying facilities is avoided. By additionally loading the nonwoven material web in the belt press with a drying fluid, the efficiency of gentle and uniform dewatering is further increased without any loss of volume.
  • a drying device with at least one drying cylinder is used as the thermal drying device and the roller of the belt press is at least partially disposed below the first drying cylinder of this drying device considered in the web running direction.
  • a particularly compact nonwoven fabricating apparatus is obtained. Good results are obtained in this regard, in particular, if a TAD ("through air drying") or air drying device, a flat bed furnace or a Yankee cylinder is used as the thermal drying device.
  • the nonwoven material web can be brought by such a thermal drying device in particular to the final dry content.
  • the roller of the belt press is arranged completely under the first drying cylinder of the thermal drying device viewed in the web running direction. In this way, an even more compact nonwoven fabricating apparatus is obtained.
  • (endless) tapes for the inner band and the outer press belt of the belt press against drying fluid and preferably against air and / or water vapor permeable (endless) tapes are used and is at the same time with the pressing Nonwoven material web against the roller or simultaneously With the mechanical pressurization of the nonwoven web, a drying fluid is forced through the permeable (endless) belts and nonwoven web. In this way, a particularly gentle and uniform drainage with a high degree of dewatering is achieved. Due to this, costly and bulky additional drainage devices can be dispensed with and the device can be made correspondingly space-saving and compact.
  • 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.
  • the drying fluid can be pressed in all manners through the permeable (endless) belts and the nonwoven material web, for example and preferably by creating a corresponding pressure difference between the roller and the outer press belt.
  • the nonwoven material web is exposed to heat in the extended press nip of the belt press via the drying fluid and / or separately therefrom.
  • the roller of the belt press and / or at least one belt guided through its extended press nip can be heated to impinge the nonwoven material web with heat separate from the drying fluid.
  • 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 steam / kg nonwoven web and preferably in a steam weight / nonwoven web weight ratio of 0.1 to 1 kg of steam / kg nonwoven material web, such as, for example, in a steam weight / weight ratio of the nonwoven material web of about 0.5 kg steam / kg nonwoven material web.
  • the roller of the belt press will deliver or receive the drying fluid, as set forth above, with an open surface executed. It can be designed as a roller of the belt press in particular as a suction roll or as a blower roll.
  • 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.
  • it is also expedient to remove the fluid which has dried in the belt press. te water sucked or guided in the suction roll or the permeable inner band.
  • the suction roll is preferably with a negative pressure (ie, a difference between atmospheric pressure and the pressure prevailing in the suction roll) in the range of 0.25 bar to 0.6 bar and particularly preferably with a negative pressure in the range of 0.30 to 0.55 bar, such as with a negative pressure of about 0.45 bar, applied.
  • a negative pressure ie, a difference between atmospheric pressure and the pressure prevailing in the suction roll
  • the drying fluid is preferably blown out of the blow roll at least through the permeable inner (endless) belt, the nonwoven material web and the permeable outer (endless) belt 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 material web and through the permeable outer press belt to the hood.
  • the pressure exerted on the nonwoven web also depends on, among other things, the drying fluid flow.
  • 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 from about 210 m 3 / (min m 2 ) 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 Nonwoven material web is to be acted upon in the belt press by such a drying fluid, which - as stated above - is particularly preferred.
  • 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.
  • the residence time of the nonwoven material web in the extended press nip of the belt press to between 0.05 sec. And 0.5 sec. adjust.
  • 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 nonwoven web formed from the web is transferred via a transfer belt from the former to the belt press, wherein the transfer belt forms the inner band and the nonwoven web passes through the belt press and then to the thermal drying device ,
  • 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 band press can be provided with at least one other (endless) band wrapping around the roller at a predetermined wrap angle, in addition to the inner and the outer (endless) band.
  • 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.
  • a felt belt is used as the inner (endless) belt that wraps around the roller of the belt press. 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.
  • At least one outer (endless) band lying behind the nonwoven material web, viewed in the direction of flow of the drying fluid, can be provided as a felt belt. Dewatering on a felt belt results in a substantially more uniform moisture cross-section than is the case, for example, with drainage 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. If 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 (endless) belt contacting the nonwoven material web and preferably at least the outer press belt of the belt press as a structured Band is provided by the nonwoven web is structured and / or perforated accordingly.
  • the bands wrapping the roller of the belt press in particular in the case of a roller designed as a suction roller and in particular in the direction of flow of the drying fluid, comprise a permeable belt, a textured forming fabric, a fabric belt and / or a felt belt.
  • a permeable belt in particular in the case of a roller designed as a suction roller and in particular in the direction of flow of the drying fluid
  • the bands wrapping the roller of the belt press comprise a permeable belt, a textured forming fabric, a fabric belt and / or a felt belt.
  • 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 retention time of the nonwoven material web required for sufficiently high and at the same time gentle, even 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 wrap angle of the (endless) belts and on the diameter of the roller of the belt press, such a relatively large diameter results in a relatively long press nip and correspondingly efficient dewatering the longer residence time of the nonwoven 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 thermal drying device used is preferably a TAD ("through air drying") or air drying device, a flat bed furnace or a Yankee cylinder.
  • the nonwoven material web can be brought by such a thermal drying device in particular to the final dry content.
  • 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 kN / m to 90 kN / m is produced to be gentle and uniform, yet to achieve strong drainage.
  • the nonwoven fabric is preferably with a relatively low consistency on a smooth or a structured, the nonwoven according structuring and / or perforating Formiersieb with a Solid content of 0.01 to 0.1 wt .-% based on 100 wt .-% of the resulting web formed.
  • a so-called Schrägsiebformer is preferably used as a former.
  • the forming fabric may in particular also be provided with printed elevations.
  • the fibers of the nonwoven receive a three-dimensional orientation which leads to a structuring of the nonwoven with specific physical and visual properties.
  • a former with a multi-layer headbox can also be used to form a multilayer nonwoven.
  • the various nonwoven layers can be produced in particular also with different fiber types.
  • the nonwoven fabric can be formed in the former by any method known to the person skilled in the art, preferably by a dry method, wet method and / or an extrusion method. In principle, any combinations of such web-forming methods are also conceivable.
  • the formed web can be consolidated in a solidification device.
  • the solidification can in principle be carried out by any known method and include, for example, a mechanical consolidation. However, it is preferred to consolidate the web into a nonwoven web by the hydroentanglement process.
  • the formed web is solidified by entangling fibers to the nonwoven web, which is done by swirling, in particular by applying focused high pressure water jets to the web.
  • the fleece can be simultaneously structured and / or perforated by the application of water jet. By appropriate structuring, in particular a nonwoven material web having a three-dimensional surface be generated.
  • both solidification and structuring and / or perforation can take place simultaneously.
  • hydroentanglement is not mandatory and may be omitted in particular if the nonwoven fibrous web is transferred in a closed train, for example by a single transfer belt, at least 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.
  • natural fibers preferably from northern bleached kraft pulp (NBKP), hardwood pulp (LBKP), pulp from abaca fibers or cotton
  • 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
  • the substance entry into the former 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 and are up to 40 mm long.
  • the pulp suspension in question is preferably completely dewatered by the flat or structured forming fabric to form the fleece.
  • the nonwoven fabric formed in the former can be transferred to a subsequent device part by any means known to those skilled in the art.
  • the nonwoven material web can be taken over by the forming fabric of the former onto the inner band simultaneously serving as a transfer belt in the region of a take-off suction box or pipe, wherein the removal suction box or the removal pipe is arranged within the loop of the circulating inner band.
  • the nonwoven material web can be taken in the region of a Abdgingsaugwalze from the forming fabric of the former on the same time serving as a transfer belt inner band, which is disposed within the loop of the circulating inner band.
  • the nonwoven web be transferred directly from the inner band to the thermal dryer, and preferably to its first dryer cylinder, immediately downstream of the roller of the belt press.
  • 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 later use of the nonwoven fabric.
  • Another object of the present invention is an apparatus for producing a nonwoven fabric, which comprises a former for forming a nonwoven, a belt press for further dewatering of the resulting from the nonwoven
  • Nonwoven material web and a thermal drying device comprises, by means of which the further dewatered nonwoven web is then dried in particular to the final dry content.
  • the belt press comprises a roller around which - at least one fitting against the roller - to form a press nip or press nip extended in the direction of travel of the nonwoven material web inner band and an outer press belt are wound.
  • the nonwoven fabric web is passed along with at least the inner band and the press belt therebetween through the extended press nip.
  • the press belt can be pressed with a belt tension of at least 15 kN / m to the roller and preferably pressed, wherein the belt press is arranged in the running direction (L) of the nonwoven material web immediately before the thermal drying device.
  • the thermal drying device is designed as a drying device with at least one drying cylinder and the roller of the belt press is at least partially disposed below the first drying cylinder of this drying device considered in the web running direction. In this way, a particularly compact nonwoven production device is obtained.
  • the device as thermal drying device comprises a TAD ("through air drying") or air drying device, a flat bed furnace or a Yankee cylinder.
  • the nonwoven material web can be brought by such a thermal drying device in particular to the final dry content.
  • the roller of the belt press is arranged completely below the first drying cylinder of the thermal drying device viewed in the web running direction. In this way, an even more compact nonwoven fabricating apparatus is obtained.
  • the (endless) belts of the belt press as compared to drying fluid and preferably to air and / or water steam permeable (endless) belts are designed so that simultaneously with the pressing of the nonwoven material web against the roller or simultaneously with the mechanical pressure loading 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 web.
  • the roller of the belt press is designed in this embodiment with 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.
  • the nonwoven material web in the extended press nip of the belt press on the drying fluid and / or separately or be acted upon with heat.
  • Nonwoven material web with heat can be heated, for example, the roller of the belt press and / or at least one guided through the extended press nip band. Alternatively or additionally, it is also conceivable to heat the nonwoven material web shortly before it enters the belt press.
  • 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 at a temperature in a range of 50 ° C. to 250 ° C., preferably with a temperature in a range of 150 ° C to 250 ° C, and more preferably at a temperature in a range of 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 in particular, this may be in a steam weight / weight ratio of the nonwoven web of up to 2 kg steam / kg nonwoven web and preferably from 0.1 to 1 kg steam / kg nonwoven 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 for dispensing or receiving the drying fluid as above set forth, executed with an open surface.
  • the roller of the belt press in this embodiment can be configured in particular as a suction roll or as a blow roll.
  • 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 starting from a drying fluid hood at least by the permeable outer Press belt, the nonwoven web and the permeable inner (endless) tape can be sucked into the suction roll.
  • at least one (endless) belt is preferably designed so 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 reduced pressure in the range from 0.25 bar to 0.6 bar and preferably from 0.30 bar to 0.55 bar and particularly preferably from about 0.45 bar.
  • the roller of the belt press is designed as a blow roll, wherein the roller 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 web and the permeable outer press belt may preferably be blown to a hood.
  • At least one (endless) belt is preferably designed such that, in addition to the drying fluid, the water dewatered 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 such that a mechanical pressure of less than 140 kPa, preferably less than 100 kPa, and particularly preferred, is applied to the nonwoven material web in the belt press or in the extended press nip of the belt press of less than 90 kPa on the nonwoven material web is exercisable.
  • the belt press is provided with only two (endless) belts that wrap around the roller and the nonwoven material web between these two (endless) belts can be arranged touching and preferably arranged.
  • both the inner and outer press belts contact the nonwoven web.
  • 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) belts that encircle the roller of the belt press comprise at least one nonwoven belt and / or at least one fabric belt.
  • the inner (endless) belt that wraps 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.
  • an outer press belt of the belt press for example, an at least substantially smooth belt and preferably a smooth forming belt can be provided.
  • at least one band of the belt press, which contacts the nonwoven material web, and preferably at least the outer press belt is designed as a structured belt, by means of which the nonwoven material web can be structurally and / or perforated.
  • the bands wrapping the roller of the belt press in particular in the case of a roller designed as a suction roller and especially in the direction of flow of the drying fluid, comprise a permeable belt, a textured forming fabric, a fabric belt and / or a felt belt include.
  • the (endless) belts 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.
  • 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 apparatus is preferably designed such that a drying fluid flow in the band press 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 particularly preferably from about 210 m 3 / (min m 2 ) is generated.
  • the nonwoven material web may additionally be provided before or after the belt press be guided over a vacuum applied suction roll.
  • the nonwoven fabric formed in the former can be solidified to a nonwoven material web without hydroentanglement.
  • an additional dewatering press is arranged between the belt press and the thermal drying device, in which 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 can be generated up to 90 kN / m.
  • the former for forming a nonwoven fabric of low consistency than Schrägsiebformer and also designed so that the fleece in the former on a smooth or textured, the nonwoven according structuring and / or perforating Formiersieb with a solids content from 0.01 to 0.1 wt .-% based on 100 wt .-% of the obtained web, the web is formed.
  • the former may, in particular, comprise a multi-layer headbox, which is preferably designed to produce the various nonwoven layers having different types of fibers.
  • the inner band of the belt press belt is formed by a transfer belt to which the nonwoven material web is taken in the region of a decrease suction box or tube of the forming of the former, wherein the Ab Spotifysaugkasten or the Ab Spotifysaugrohr is disposed within the loop of the circumferential inner band.
  • the inner band which surrounds the roller of the belt press is formed by a transfer belt onto which the nonwoven material web in the region of a pick-up suction roll is taken over by the forming fabric of the former, which is arranged inside the loop of the circulating inner band.
  • the nonwoven material web is transferred directly from the inner belt to the thermal drying device directly behind the roller of the belt press and preferably to its first drying cylinder.
  • 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.
  • the former can also be configured in such a way that a nonwoven fabric can be produced by any combination of such nonwoven forming processes.
  • the device may comprise a hydroentangling device downstream of the former, ie in the web running direction downstream of the former, and upstream of the belt press, ie upstream of the belt press in the web running direction.
  • FIG. 1 shows a schematic representation of an exemplary embodiment of the device according to the invention for the production of a nonwoven fabric
  • Fig. 2 is a schematic representation of another exemplary embodiment
  • Fig. 1 shows a schematic representation of an exemplary embodiment of the device 10 according to the invention for producing a nonwoven fabric.
  • the web is formed in a former 28 by a particular method or combination of such methods.
  • the nonwoven can be formed in particular by a dry process, a wet process and / or an extrusion process.
  • the former 28 can be designed to form a nonwoven fabric of low consistency, in particular as an oblique wire former, and furthermore in such a way that the nonwoven fabric in the former 28 is deposited on a smooth or structured forming fabric 14 structuring and / or perforating the nonwoven with a solids content of 0.01 to 0.1 wt .-% based on 100 wt .-% of the resulting web, the web is formed.
  • the former 28 includes a headbox 20, which may be a sizing or a multi-layer former. If a multi-layer headbox is used, the various nonwoven layers can also be produced, in particular, with different types of fibers.
  • the formed nonwoven may e.g. be solidified by means of a hydroentanglement device 32. However, such hydroentanglement is not always mandatory.
  • the resulting from the web and optionally solidified nonwoven web 52 is then further dehydrated.
  • the further dewatered nonwoven material web 52 is subsequently dried by means of a thermal drying device 46, in particular to the final dry content.
  • Nonwoven material web 52 comprises a dewatering by means of a belt press 34, through which the nonwoven material web 52 is passed to the former 28 and before its transfer to the thermal drying device 46 therethrough.
  • the belt press 34 comprises a roller 36, about which at least one roller 36 is in contact with the roller 36 for forming a press nip or press nip 38 extended in the running direction L of the nonwoven material web 52 over a respective wrap angle.
  • inner band 40 and an outer press belt 42 which, as shown, are endless circulating belts. In this case, the nonwoven material web 52 is guided together with at least the inner band 40 and the outer press belt 42 between them lying through the extended press nip 38.
  • a press belt outer circumferential endless belt 42 of the belt press 34 is to generate a mechanical pressure on the lying between the two endless belts 40, 42 nonwoven web with a belt tension of at least 15 kN / m around the roller 36 stretched or to this roller 36th pressed.
  • this press belt 42 the nonwoven material web and the roller 36 touching inner circumferential endless belt 40 are pressed against the roller 36.
  • a drying fluid is forced through the endless belts 40, 42 and nonwoven web 52 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 for the
  • the roller 36 of the belt press 34 is provided with an open surface for discharging or receiving the drying fluid.
  • 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.
  • the nonwoven material web may be exposed to heat in the extended nip 38 of the belt press 34 via the drying fluid and / or separately therefrom. Heat can be applied to the nonwoven material web separately from the drying fluid, for example via the roller 36 of the belt press, at least one of the circulating belts 40, 42 and / or by the material web being heated shortly before it enters the belt press 34.
  • 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 roller 36 of the belt press 34 can be designed in particular as a suction roll or as a blow roll.
  • the drying fluid starting from a drying fluid hood, is sucked or guided into the suction roll, at least through the permeable outer endless belt 42, the nonwoven material web and the permeable inner endless belt 40.
  • the drying fluid from the blow roll is blown into the hood through at least 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 in addition to the inner and outer endless belts 40, 42, may also be provided with at least one further endless belt wrapping the roller 36 over a certain wrap angle.
  • at least one such further endless belt for example be arranged between the outer endless belt 42 and the nonwoven material web.
  • the endless belts 40, 42 embracing 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. If the nonwoven material web in the belt press 34 is additionally additionally acted upon by a drying fluid, then 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 of the nonwoven material web contacting endless belt 40, 42 and preferably at least the outer press belt 42 of the belt press 34 is designed as a structured band through which the nonwoven material web is structured and / or perforated accordingly ,
  • the roller 36 of the belt press 34 looping endless belts 40, 42 include in particular in the case of a suction roller designed as a suction roller and in particular viewed in the direction of the drying fluid, a permeable endless belt, a textured forming fabric, a fabric belt and a felt belt.
  • a suction roller designed as a suction roller and in particular viewed in the direction of the drying fluid
  • a permeable endless belt a permeable endless belt
  • a textured forming fabric a fabric belt and a 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 can be guided through at least one thermal drying device 46, in particular a TAD ("through air drying") device, a flat bed furnace or a Yankee cylinder.
  • the nonwoven material web can be dried in such a thermal drying device 46 in particular to the final dry content.
  • the non-woven material having a solids content of in particular 0.01 to 0.1% can be formed on a smooth or structured forming fabric 14 which structurally and / or perforates the nonwoven fabric.
  • the fleece can also be structured and / or perforated at the same time by the optionally provided hydroentanglement device 32.
  • 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 furnish in the former 28 may be i) at least partially made from natural fibers, such as northern bleached kraft pulp (NBKP), hardwood pulp (LBKP), abaca fiber pulp, cotton or the like, ii) at least partially from man-made fibers, such as Viscose or the like, iii) at least partially made of synthetic fibers, such as in particular polyester, polyamide or the like, iv) at least partially of mineral fibers, in particular glass fibers or the like, v) at least partly of carbon fibers and / or vi) of a mixture of any of the aforementioned Consist of substances.
  • natural fibers such as northern bleached kraft pulp (NBKP), hardwood pulp (LBKP), abaca fiber pulp, cotton or the like
  • man-made fibers such as Viscose or the like
  • synthetic fibers such as in particular polyester, polyamide or the like
  • mineral fibers such as in particular glass fibers or the like
  • the substance entry into the former 28 at least partially consists of fibers which are up to 40 mm long.
  • the nonwoven material web can be before or after Belt press 34 may be guided over a vacuum-applied suction roll.
  • dewatering press 58 which is designed in the present case as a roller press.
  • additional dewatering press 58 is also not mandatory.
  • the belt press 34 viewed in the direction of travel L of the nonwoven material web 52, is arranged directly in front of the thermal drying device 46.
  • the thermal dryer 46 may be e.g. be executed as a drying device with at least one drying cylinder 54.
  • a drying device 46 for example, a
  • the roller 36 of the belt press 34 is preferably at least partially below the first drying cylinder of this drying device considered in the web running direction L, in this case at least partially below it single drying cylinder 54 of the TAD or air drying device arranged.
  • the roller 36 of the belt press 34 may in particular also be arranged completely below the first drying cylinder, in this case the single drying cylinder 54. In this way - as desired - a particularly compact Vliesher eins- device is obtained.
  • the inner band 40 wrapping the roller 36 of the belt press 34 can be formed by a transfer belt onto which the nonwoven material web 52 in the region of a suction box or tube 16 from the forming screen 14 of the former 28 taken over and the nonwoven web 52 of the belt press 34 is supplied before the web is guided together with this inner band 40 and the outer press belt 42 between them lying through the extended press nip 38 of the belt press 34.
  • the suction box or the suction tube 16 is arranged within the loop of the circulating inner band 40.
  • the nonwoven material web 52 is viewed in the web running direction L directly behind the roller 36 of the belt press 34 directly from the inner belt 40 to the thermal drying device 46 and preferably directly to the first drying cylinder, here for example the single drying cylinder 54 of a TAD or air drying device , to hand over.
  • FIG. 2 shows a schematic representation of a further exemplary embodiment of the device 10 according to the invention.
  • the inner band 40 wrapping the roller 36 of the belt press 34 is again formed by a transfer belt onto which the nonwoven material web 52 of the forming fabric 14 of the former 28 is taken over and through which the nonwoven material web 52 of the belt press 3 is fed before the web 52 is guided together with this inner band 40 and the outer press belt 42 between them lying through the extended press nip 38 of the belt press 34.
  • the takeover of the nonwoven web 52 from the Formierieb 14 of the former 28 on the inner band 40 in the present case, however, in the region of a Ab Spotifygwalze 18.
  • This Ab Spotifysaugwalze 18 is again arranged within the loop of the circulating inner band 40 is.
  • the present embodiment according to FIG. 2 corresponds to that according to FIG. 1.
  • TAD thermal drying device

Abstract

L'invention concerne un procédé de fabrication d'un non-tissé dans lequel une nappe de fibres est façonnée dans une forme, la bande continue de matériau non-tissé ainsi obtenue est ensuite soumise à un égouttage supplémentaire et bande continue de matériau non-tissé ainsi égouttée est ensuite séchée au moyen d'un système de séchage thermique, en particulier jusqu'à atteindre sa teneur finale en matière sèche. Selon l'invention, l'égouttage supplémentaire 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 et la bande continue de matériau non-tissé et la bande intérieure sont ainsi comprimées contre le cylindre. Le filtre-presse à bandes est disposé directement avant le système de séchage thermique dans le sens d'avance de la bande continue de matériau non-tissé. L'invention concerne en outre un dispositif adapté pour mettre en œuvre le procédé.
PCT/EP2014/062625 2013-07-04 2014-06-17 Procédé et dispositif compact de fabrication de non-tissé WO2015000690A1 (fr)

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DE102013213105.4 2013-07-04

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WO2016066375A1 (fr) * 2014-10-29 2016-05-06 Voith Patent Gmbh Dispositif d'égouttage d'une bande de matière fibreuse
CN106637676A (zh) * 2016-11-01 2017-05-10 杭州萧山凤凰纺织有限公司 一种超柔软水刺非织造布的制备方法
CN108277679A (zh) * 2017-12-28 2018-07-13 仙鹤股份有限公司 一种强化纸生产方法
CN108611760A (zh) * 2018-05-18 2018-10-02 大源无纺新材料（天津）有限公司 一种用于制备低厚度非织造布的系统
CN114277510A (zh) * 2021-12-28 2022-04-05 郑州九如非织造有限公司 一种水刺无纺布生产线

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CN108277679A (zh) * 2017-12-28 2018-07-13 仙鹤股份有限公司 一种强化纸生产方法
CN108611760A (zh) * 2018-05-18 2018-10-02 大源无纺新材料（天津）有限公司 一种用于制备低厚度非织造布的系统
CN114277510A (zh) * 2021-12-28 2022-04-05 郑州九如非织造有限公司 一种水刺无纺布生产线

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