EP3051013B1 - Method for guiding a nonwoven web - Google Patents
Method for guiding a nonwoven web Download PDFInfo
- Publication number
- EP3051013B1 EP3051013B1 EP15153315.5A EP15153315A EP3051013B1 EP 3051013 B1 EP3051013 B1 EP 3051013B1 EP 15153315 A EP15153315 A EP 15153315A EP 3051013 B1 EP3051013 B1 EP 3051013B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nonwoven web
- stabilizing plate
- roller
- conveying direction
- conveyed
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims description 25
- 230000000087 stabilizing effect Effects 0.000 claims description 80
- 239000004033 plastic Substances 0.000 claims description 12
- 239000004750 melt-blown nonwoven Substances 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 230000006641 stabilisation Effects 0.000 description 9
- 238000011105 stabilization Methods 0.000 description 9
- 239000000835 fiber Substances 0.000 description 7
- 230000002411 adverse Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 238000005056 compaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 238000003490 calendering Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/12—Stretch-spinning methods
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C29/00—Finishing or dressing, of textile fabrics, not provided for in the preceding groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/28—Registering, tensioning, smoothing or guiding webs longitudinally by longitudinally-extending strips, tubes, plates, or wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
-
- 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
-
- 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
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
-
- 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
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/03—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random
- D04H3/033—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments at random reorientation immediately after yarn or filament formation
-
- 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
- D04H3/14—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 thermoplastic yarns or filaments produced by welding
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
- D06C15/02—Calendering, pressing, ironing, glossing or glazing textile fabrics between co-operating press or calender rolls
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
- D06C15/00—Calendering, pressing, ironing, glossing or glazing textile fabrics
- D06C15/08—Rollers therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2404/00—Parts for transporting or guiding the handled material
Definitions
- the invention relates to a method for guiding a conveyed in a conveying direction F nonwoven web of plastic fibers.
- Such nonwoven webs are usually guided over the guide rollers and / or treatment rollers after the deposition of the plastic fibers to the nonwoven web.
- the treatment rollers can be, for example, compacting rollers for compaction of the nonwoven web or calender rolls for calendering the nonwoven web.
- a feed device for the nonwoven web is provided in the form of a conveyor belt, on which the nonwoven web can be fed to the calender or to the nip on the calender.
- the conveyor belt has a slope towards the calender or towards the nip.
- an auxiliary device for an undisturbed transition of the web is provided in the nip. Part of this auxiliary device may be a arranged in the transition region short baffle. This device or the process to be carried out with it has not been proven in practice. The resulting webs also have undesirable inhomogeneous properties.
- the invention is the technical problem of providing a method of the type mentioned, with which the above-described disadvantages can be effectively avoided.
- a nonwoven web having a basis weight of less than 20 g / m 2 , preferably less than 15 g / m 2 and preferably less than 10 g / m 2 is conveyed.
- basis weights below 20 g / m 2 especially at basis weights below 15 g / m 2 and especially at basis weights below 10 g / m 2 , the invention has proven very special.
- Nonwoven web means in the context of the invention, moreover, a nonwoven web of only one Filamentablage or even a nonwoven web laminate of several Filamentablagen.
- plastic filaments are used as plastic fibers.
- Nonwoven webs made of continuous filaments are characterized by very particular aerodynamic properties and in this respect differ significantly from nonwoven webs of short fibers.
- plastic fibers or plastic filaments made of thermoplastic material are used in the context of the invention.
- a preferred embodiment of the method according to the invention is characterized in that at least one spunbond nonwoven web and / or at least one meltblown nonwoven web is used as the nonwoven web.
- These types of nonwoven webs have proven particularly useful in the context of the method according to the invention and also in the nonwoven web guiding device according to the invention.
- Spunbond nonwoven webs and / or meltblown nonwoven webs are characterized by special properties when exposed to air or when aerodynamically influenced, and they can be conveyed in a particularly functional and trouble-free manner within the scope of the method according to the invention or with the nonwoven web guiding device according to the invention.
- the conveyed nonwoven web corresponds to a laminate of at least one spunbond nonwoven web and at least one meltblown nonwoven web. Also particularly suitable is a laminate having the layer sequence spunbond nonwoven web / meltblown nonwoven web / spunbond nonwoven web (SMS laminate).
- SMS laminate layer sequence spunbond nonwoven web / meltblown nonwoven web / spunbond nonwoven web
- At least one stabilizing plate is arranged in the conveying direction in front of a roll or in front of a roll aggregate. It is within the scope of the invention that the nonwoven web in the conveying direction F in front of the roller or in front of the roller unit via a first conveyor section is free or substantially free and wherein in this first conveyor section at least one stabilizing plate before or understoffbar before the roller or the roller unit is arranged. Free guidance of the nonwoven web here and below means, in particular, that the nonwoven web is not guided / treated by rollers or roll aggregates in this conveying section and expediently also is not guided by means of a depositing device or by means of a filing screen belt.
- the at least one stabilization plate can be arranged below the nonwoven web and / or above the nonwoven web.
- a stabilizing plate arranged below the nonwoven web the distance a between the upper side of the stabilizing plate and the underside of the nonwoven web is measured, and at a stabilizing plate arranged above the nonwoven web, the distance a between the underside of the stabilizing plate and the upper side of the nonwoven web is measured.
- the nonwoven web is conveyed freely or essentially freely in the conveying direction F behind a roll or behind a roll aggregate via a second conveying section and in this second conveying section at least one stabilizing plate behind or immediately behind the roll or the roller unit arranged.
- the at least one stabilization plate can be positioned below the nonwoven web and / or above the nonwoven web.
- the nonwoven web is guided freely or essentially freely in the conveying direction F in front of a roll or in front of a roll aggregate and in this first conveying section at least one stabilizing plate before or below the roll or before the roll is arranged in the roller assembly and that the nonwoven web is conveyed freely or substantially freely in the conveying direction F behind the roller or the roller assembly via a second conveyor section and that in this second conveyor section at least one stabilizing plate behind or immediately behind the roller or the Roller unit is positioned.
- Roller assembly means in the context of the invention at least two rollers arranged one above the other with their roller axes. These may be guide rollers and / or treatment rollers.
- a roller assembly comprises two spaced-apart superposed rollers and advantageously the nonwoven web is guided in an S-shape over or through this roller assembly (in the sense of an S-roll take-off).
- the nonwoven web can first be guided over the upper roll of the roll aggregate or first passed past the lower roll of the roll aggregate.
- the nonwoven web is first passed over the upper roll of the roll aggregate and then around the lower roll of the roll aggregate.
- At least one or a stabilizing plate below the funded or freely conveyed nonwoven web arranged in the first conveying section before or immediately before the above-described roller assembly (S-roller assembly).
- at least one planar deflecting element for deflecting the air conveyed on the surface of the conveyed nonwoven web is provided in the conveying direction behind this roll aggregate and particularly preferably directly behind the upper roll of this roll aggregate.
- the planar deflecting element preferably directs the air conveyed along by the nonwoven web surface upwards.
- a variant of the first embodiment explained above is characterized in that, in addition to the stabilizing plate arranged in front of the roll aggregate (S-roll aggregate) and below the nonwoven web, at least one additional stabilizing plate or an additional stabilizing plate is arranged in a second conveying section behind or behind the roll aggregate is.
- this stabilizing plate can be arranged above the conveyed nonwoven web or below the conveyed nonwoven web.
- the nonwoven web further guided behind the roll aggregate can be stabilized with respect to air flow effects resulting from air conveyed with the nonwoven web via the roll aggregate.
- a second embodiment of the invention is characterized in that at least one stabilizing plate or stabilizing plate is arranged above the nonwoven web in the first conveying section before or immediately before the above-described roller aggregate (S roller aggregate).
- the planar deflecting element is preferably formed curved and the arc extends suitably from the bottom of the nonwoven web downwards.
- a further proven embodiment of the invention is characterized in that at least two treatment rollers - preferably two treatment rollers - with their axes are preferably arranged directly above one another and that only a narrow treatment gap (so-called nip) is present between the two treatment rollers.
- the nonwoven web is guided through this nip and preferably both treatment rollers act on the nonwoven web, from above and from below.
- the treatment rollers are compaction rollers or calender rollers.
- the aggregate of the at least two treatment rollers is referred to here and below as a treatment roller assembly.
- Such a treatment roller assembly thus expediently has a treatment gap or nip through which the conveyed nonwoven web is guided.
- a first variant of the invention with this treatment unit is characterized in that in the conveying direction F of the nonwoven web at least one stabilizing plate - preferably a stabilizing plate - is arranged before or immediately before the roller assembly and is positioned above the nonwoven web according to the recommended embodiment.
- the nonwoven web according to a variant instead of being released also rest on a storage device or on a Ablagesiebband and the stabilizing plate is then conveniently arranged above the storage device or on the Ablagesiebband so that the funded nonwoven web itself between storage device or Ablagesiebband and arranged above stabilization plate.
- the stabilization plate is positioned at a distance a above the conveyed nonwoven web.
- a second variant of the invention with the treatment roller assembly is characterized in that in the conveying direction F of the nonwoven web before or immediately before the treatment roller assembly, a stabilizing plate above the nonwoven web and a stabilizing plate is disposed below the nonwoven web.
- the conveyed nonwoven web is guided, at least in regions, through an intermediate gap between the stabilizing plate arranged below the nonwoven web and the stabilizing plate positioned above the nonwoven web.
- the ends of the stabilizing plates are aligned in the vertical direction or substantially aligned.
- an offset or a small offset to be realized between the stabilization plates.
- a stabilization plate on its surface facing the nonwoven web has a plurality of grooves, wherein the grooves according to a variant embodiment may be aligned at least partially parallel to each other.
- the grooves may for example also be arranged in a herringbone pattern.
- openings or pressure compensation openings can be positioned in the region or in the grooves. It is possible that air is sucked through the pressure equalization openings from the intermediate area between nonwoven web and stabilizing plate. It is within the scope of the invention that the air flows between nonwoven web and stabilizing plate can be adjusted or influenced in an advantageous manner by the number and arrangement of the grooves and / or by the number and arrangement of the pressure equalization openings.
- the stabilizing element is expediently designed as a planar deflecting element.
- the air conveyed by the conveyed nonwoven web on the nonwoven web surface can be deflected or deflected away from the nonwoven web surface in an effective manner.
- the flat deflecting element is expediently designed as a flat deflecting plate.
- Such a flat deflecting element is arranged above and / or below the conveyed nonwoven web, so that air entrained by the nonwoven web top side and / or entrained air from the nonwoven web underside can be deflected away from the nonwoven web surface with the aid of the planar deflecting element or planar deflecting plate. Examples for this are explained in more detail in the description of the figures.
- the conveyed nonwoven web is conveyed at a conveying speed of greater than 600 m / min, preferably greater than 700 m / min and particularly preferably greater than 750 m / min. It is within the scope of the invention that the conveyed nonwoven web in the region of a stabilizing plate or in the region of at least one stabilizing plate is guided free of gas loading and thus free of any air impingement and free of steam. Conveniently, therefore, the nonwoven web is not specifically or not artificially charged with a gas and thus not with air or steam.
- At least one feed device for the conveyed nonwoven web is present, wherein at least one guide and / or treatment roll (roller) for the nonwoven web or at least one roller assembly of at least two guide rollers and / or treatment rollers (rollers ) is arranged for the nonwoven web in the conveying direction of the nonwoven web behind the supply device, wherein in the conveying direction F before or immediately before the roller or the roller assembly and / or in the conveying direction F behind or immediately behind the roller or the roller assembly at least one in Conveying direction F and transverse to the conveying direction F of the nonwoven web extending stabilizing plate is provided.
- at least one guide and / or treatment roll (roller) for the nonwoven web or at least one roller assembly of at least two guide rollers and / or treatment rollers (rollers ) is arranged for the nonwoven web in the conveying direction of the nonwoven web behind the supply device, wherein in the conveying direction F before or immediately before the roller or the roller assembly and / or in the conveying direction F behind or immediately
- the shortest distance A 1 between the roller-side end of a arranged in the conveying direction F before the roller or before the roll aggregate stabilizing plate and the stabilizing plate downstream in the conveying direction roller or first roller 0.2 to 500 mm, preferably 0.2 to 200 mm, preferably 0.2 to 100 mm and particularly preferably 0.2 to 50 mm. According to one embodiment, the distance A 1 amounts to 0.2 to 40 mm.
- the shortest distance A 2 between the roller-side end of a in the conveying direction F behind the roller or behind the roller assembly arranged stabilizing plate and the stabilizing plate in the conveying direction upstream roller or last roll of the roll unit 0.2 to 500 mm, preferably 0.2 to 150 mm, preferably 0.2 to 100 mm.
- the feeding device for feeding the nonwoven web used in the context of the invention may, for example, be a conveyor belt or a conveyor belt of a storage screen belt or another depositing device which conveys the nonwoven web in the conveying direction F. In principle, however, it is also possible to use any device with which the aid can move the nonwoven web in the conveying direction F.
- a roller assembly is provided from at least two guide rollers, wherein the two guide rollers are arranged with the proviso that the funded nonwoven web is first passed over an upper guide roller and subsequently thereto at a lower roller arranged below the upper Guide roller is guided.
- the guidance may also be reversed, i.
- the conveyed nonwoven web is first passed along the lower guide roller and then passed over the upper guide roller.
- the roller assembly has at least two treatment rollers, wherein the treatment rollers are arranged with the proviso that the conveyed nonwoven web is passed through a treatment nip or nip between the two treatment rollers.
- a preferred embodiment of the guide device according to the invention is characterized in that the at least one stabilizing plate is designed as a stationary stabilizing plate.
- the at least one stabilizing plate or the stabilizing plates in particular outside the operation of the guide device with respect to their position is adjustable or finely adjustable / are.
- At least one stabilizing element is designed as a planar deflecting element, preferably as a flat deflecting plate.
- the planar deflecting element or the deflecting plate arranged at a small distance u to the nonwoven web surface Umlenkzunge, wherein by means of the Umlenkzunge of the nonwoven web at the nonwoven web surface mitge organizerte air is deflected or deflected over the planar deflecting element of the nonwoven web surface.
- the invention is based on the finding that with the method according to the invention or with the nonwoven web guiding device according to the invention an optimal functionally reliable and trouble-free guidance of nonwoven webs is possible, in particular also of nonwoven webs with a small thickness and with a low basis weight.
- the disturbing influence of air currents can be largely reduced or minimized with the aid of the guiding measures according to the invention, so that unwanted fluttering of the nonwoven web no longer occurs or occurs only negligibly.
- the running behavior of the moving nonwoven web can be remarkably improved in comparison to many known methods and guide devices. Undesirable high trains are not required, so even the resulting unwanted Reductions in nonwoven web width as well as undesirable reductions in cross direction strength of the nonwoven web do not occur.
- the technical problem according to the invention can be solved with relatively simple and cost-effective measures, namely surprisingly effective and reliable.
- the figures show a nonwoven web guiding device for carrying out the method according to the invention for guiding a nonwoven web 1 of plastic fibers conveyed in a conveying direction F.
- the plastic fibers are preferably and in the exemplary embodiment plastic endless filaments, these plastic filaments being suitable made of thermoplastic material.
- the nonwoven web 1 it may be a spunbond nonwoven web in the exemplary embodiment according to the figures.
- a nonwoven web laminate as the nonwoven web, the laminate then preferably comprising at least one spunbond nonwoven web and one meltblown nonwoven web, and particularly preferably a laminate having a layer sequence of spunbond nonwoven web / meltblown nonwoven web / spunbond web.
- SMS Nonwoven web
- the nonwoven web 1 has a web thickness d of less than 2 mm and preferably has a basis weight of less than 20 g / m 2 , more preferably less than 15 g / m 2 .
- the nonwoven web 1 comes in touching contact with guide rollers 2 and / or treatment rollers 3.
- a guide roller assembly 4 has a plurality of guide rollers 2, preferably two guide rollers 2 and a treatment unit 5 has a plurality of treatment rollers 3, preferably two treatment rollers 3.
- the Fig. 1 shows a nonwoven web guide device according to the prior art. Here, the nonwoven web 1 is guided only over the two guide rollers 2 of an S-shaped guide roller assembly 4.
- the Fig. 2 to 5 show one too Fig. 1 Analog nonwoven web guiding device for carrying out the method according to the invention.
- the nonwoven web 1 is in turn passed over an S-shaped guide roller assembly 4 of two guide rollers 2 arranged directly above one another.
- stabilizing plate 6 is provided in the conveying direction F before or immediately before the guide roller assembly 4 or before / immediately before the upper guide roller 2 in the conveying direction F and transverse to the conveying direction F of the nonwoven web 1 extending stabilizing plate 6 is provided.
- the stabilization plate 6 is arranged below the nonwoven web 1 at a distance a from the nonwoven web.
- the distance a may be between 0.1 and 3 mm in the exemplary embodiment.
- Stabilizing plate 6 arranged below nonwoven web 1 can control the air entrained on the lower surface of nonwoven web 1 in a functionally reliable manner.
- a planar deflecting element 7 in the form of a planar deflecting plate 7 is positioned behind the guide roller assembly 4 or. With the help of this flat deflecting element 7, the entrained at the top of the funded nonwoven web 1 air is deflected upward, so that the air flow is not - as in the embodiment of Fig. 1 - Can meet on the conveyed behind the guide roller assembly 4 nonwoven web 1.
- planar deflecting element 7 is preferred and arc-shaped in the exemplary embodiment, so that the entrained with the nonwoven web 1 air is deflected upward.
- the Fig. 3 shows another embodiment of the nonwoven web guiding device.
- a stabilizing plate 6 at a distance a below the nonwoven web 1 is arranged.
- a further stabilizing plate 6 is arranged at a distance a above the nonwoven web 1. Also, this will be on the right side of the Fig. 1 shown negative influence of entrained by the nonwoven web 1 and guided over the upper guide roller 2 air effectively avoided by the nonwoven web 1 is protected behind the guide roller assembly 4 of the positioned above the nonwoven web 1 stabilizing plate 6 from this adverse air flow.
- the Fig. 4 shows a similar embodiment as the Fig. 2 , Here, however, immediately behind the guide roller assembly 4, the second stabilizing plate 6 is arranged at a distance a below the nonwoven web 1. However, this also effectively avoids the negative influence of the air flow described above. The nonwoven web 1 can function safely and continue largely without deformation on the second stabilizing plate 6.
- a stabilizing plate 6 positioned at a distance above the nonwoven web 1 a.
- This stabilizing plate 6 arranged at the top has the effect that the air entrained on the upper side of the nonwoven web 1 does not act as in FIG Fig. 1 shown on the right side - the non-woven web 1 continued beyond the guide roller assembly 4 can adversely affect or act upon.
- a planar deflecting element 7 is arranged with the proviso that the mitgechante on the underside of the nonwoven web 1 air is deflected away by means of this planar deflecting element 7 of the nonwoven web 1.
- this planar deflecting element 7 has a deflecting tongue 8 arranged at a small distance u from the lower nonwoven web surface and, starting from this deflecting tongue 8, the planar deflecting element 7 is bent downwards.
- the Fig. 6 shows another embodiment of the nonwoven web guiding device.
- the conveyed nonwoven web 1 is guided through a narrow treatment nip 9 (nip) between an upper treatment roller 3 and a lower treatment roller 3 of a treatment roller assembly 5.
- the treatment roller assembly 5 may be a calender roller assembly.
- at least one treatment roller 3 of this calender roll aggregate or treatment roll aggregate 5 is heated.
- the nonwoven web 1 is still guided in the conveying direction in front of this treatment roller assembly 5 on a Ablagesiebband 10.
- a stabilizing plate 6 is positioned above the nonwoven web 1 at a distance a immediately before the treatment roller assembly 5.
- a treatment roller assembly 5 according to the nonwoven web guiding device Fig. 6 shown.
- the through the treatment gap 9 of the treatment roller assembly 5 guided nonwoven web 1 is passed immediately before the treatment roller assembly 5 between two stabilizing plates 6.
- Each stabilizing plate 6 is positioned at a distance a above or below the nonwoven web 1. Negative influences of both the top and at the bottom of the nonwoven web 1 mitge formulaten air can be effectively avoided by this arrangement.
- the nonwoven web 1 is also guided by a treatment roller assembly 5 of two treatment rollers 3.
- the guided through the treatment nip 9 nonwoven web 1 is performed immediately before the treatment roller assembly 5 via a stabilizing plate 6.
- the stabilizing plate 6 is arranged at a distance a below the nonwoven web 1.
- a planar deflection element 7 on the nonwoven web 1 is present and with the help of this planar deflecting element 7 can be deflected away from the nonwoven web 1 at the top of the nonwoven web 1 mitgechelte air.
- the flat deflecting element 7 has a deflecting tongue 8 arranged at a short distance u from the upper nonwoven web surface.
- the planar deflecting element 7 is formed bent upwards.
- mitge organizerte air is deflected over the arc of the planar deflecting element 7 upwards.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Treatment Of Fiber Materials (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Unwinding Webs (AREA)
- Advancing Webs (AREA)
Description
Die Erfindung betrifft ein Verfahren zur Führung einer in einer Förderrichtung F geförderten Vliesbahn aus Kunststoff-Fasern. Solche Vliesbahnen werden nach der Ablage der Kunststoff-Fasern zur Vliesbahn in der Regel über Führungswalzen und/oder Behandlungswalzen geführt. Bei den Behandlungswalzen kann es sich beispielsweise um Kompaktierwalzen zur Kompaktierung der Vliesbahn oder um Kalanderwalzen zum Kalandrieren der Vliesbahn handeln.The invention relates to a method for guiding a conveyed in a conveying direction F nonwoven web of plastic fibers. Such nonwoven webs are usually guided over the guide rollers and / or treatment rollers after the deposition of the plastic fibers to the nonwoven web. The treatment rollers can be, for example, compacting rollers for compaction of the nonwoven web or calender rolls for calendering the nonwoven web.
Verfahren der vorstehend genannten Art sind aus der Praxis in unterschiedlichen Ausführungsformen bekannt. Bei der Förderung einer Vliesbahn mit einem Ablagesiebband und/oder mittels Führungswalzen und/oder Behandlungswalzen wird stets eine Luftströmung hervorgerufen, die in Förderrichtung der Vliesbahn gleichsam mitbewegt wird. Diese Luftströmung führt in Bezug auf die Vliesbahnen zu einem schlechten Laufverhalten insbesondere im Bereich der Führungswalzen und/oder Behandlungswalzen, die zwischen dem Ablagesiebband und einer Wickelvorrichtung angeordnet sind. Auch das Laufverhalten am Ablagesiebband und im Bereich der Wickelvorrichtung wird negativ beeinträchtigt. Das schlechte Laufverhalten äußert sich in einem Flattern der Vliesbahn, woraus Abrisse der Vliesbahn oder unerwünschte Falten in der Vliesbahn resultieren können. Diese Störungen versucht man durch höhere Bahnzüge auszugleichen, um die Vliesbahn zu kontrollieren. Diese höheren Bahnzüge bedingen wiederum eine geringere Breite der Vliesbahn auf der Wickelvorrichtung sowie verschlechterte Eigenschaften der Vliesbahn, insbesondere eine geringe Festigkeit bzw. Zugfestigkeit der Vliesbahn quer zur Maschinenrichtung (in CD-Richtung). Die von der Vliesbahn mitgeförderte Luft kann außerdem problematisch beim Lauf der Vliesbahn um eine Führungswalze und/oder Behandlungswalze sein. So kann es zu einem unerwünschten Aufschweben der Vliesbahn auf der Walze kommen und im Übrigen kann Luftströmung von einer Walze aus auf die Vliesbahnoberfläche gelenkt werden und hier unerwünschte inhomogene Eigenschaften des Produktes bedingen.Methods of the type mentioned above are known in practice in different embodiments. In the promotion of a nonwoven web with a Ablagesiebband and / or by means of guide rollers and / or treatment rollers, an air flow is always caused, which is at the same time moved in the conveying direction of the nonwoven web. With regard to the nonwoven webs, this air flow leads to poor running behavior, in particular in the area of the guide rollers and / or treatment rollers, which are arranged between the storage screen belt and a winding device. The running behavior on the storage screen belt and in the area of the winding device is adversely affected. The poor running behavior manifests itself in fluttering of the nonwoven web, which may result in discontinuities of the nonwoven web or unwanted wrinkles in the nonwoven web. These disturbances are attempted to be compensated by higher trains to control the nonwoven web. These higher web courses in turn require a smaller width of the nonwoven web on the winding device as well as deteriorated properties of the nonwoven web, in particular a low strength or tensile strength of the nonwoven web transversely to the machine direction (in CD direction). The conveyed by the nonwoven web air can also be problematic when running the nonwoven web to a Guide roller and / or treatment roller. Thus, it can lead to an unwanted floating of the nonwoven web on the roller and, moreover, air flow can be directed from a roller on the nonwoven web surface and cause undesirable inhomogeneous properties of the product here.
Um den geschilderten negativen Eigenschaften entgegenzutreten, ist es aus der Praxis bereits bekannt, zusätzliche Walzen (Führungs- bzw. Umlenkwalzen) in den Förderweg der Vliesbahn einzubauen. Auch andere Führungselemente wie gebogene Stäbe oder dergleichen wurden bereits verwendet. Diese Maßnahmen sind einerseits aufwendig und kostspielig und andererseits haben sie oftmals nicht zum gewünschten Erfolg geführt. Es ist fernerhin bereits bekannt, in den Förderweg der Vliesbahn sogenannte Spoilerbleche einzubauen, um Luftströmungen umzuleiten. Auch das ist bislang in der Regel mit noch nicht zufriedenstellendem Erfolg gelungen.In order to counteract the described negative properties, it is already known from practice to install additional rollers (guiding or deflecting rollers) in the conveying path of the nonwoven web. Other guide elements such as curved bars or the like have already been used. These measures are on the one hand consuming and costly and on the other hand, they often have not led to the desired success. Furthermore, it is already known to install so-called spoiler sheets in the conveying path of the nonwoven web in order to redirect air flows. Also, this has so far usually succeeded with unsatisfactory success.
Aus
Demgegenüber liegt der Erfindung das technische Problem zugrunde, ein Verfahren der eingangs genannten Art anzugeben, mit dem die vorstehend geschilderten Nachteile effektiv vermieden werden können.In contrast, the invention is the technical problem of providing a method of the type mentioned, with which the above-described disadvantages can be effectively avoided.
Zur Lösung dieses technischen Problems lehrt die Erfindung, ein Verfahren zur Führung einer in einer Förderrichtung F geförderten Vliesbahn aus Kunststoff-Endlosfilamenten, wobei eine Vliesbahn mit einer Bahndicke d kleiner 2 mm, bevorzugt kleiner 1,5 mm und mit einem Flächengewicht kleiner 30 g/m2, bevorzugt kleiner 25 g/m2 eingesetzt wird,
wobei die Vliesbahn in Berührungskontakt mit zumindest einer Führungs- und/oder Behandlungswalze (Walze) bzw. zumindest einem Walzenaggregat aus zumindest zwei Führungs- und/oder Behandlungswalzen (Walzen) gebracht wird,
- wobei in Förderrichtung F vor bzw. unmittelbar vor der Walze bzw. dem Walzenaggregat
- und/oder in Förderrichtung F hinter bzw. unmittelbar hinter der Walze bzw. dem Walzenaggregat
wherein the nonwoven web is brought into contact contact with at least one guide and / or treatment roller (roller) or at least one roller assembly of at least two guide and / or treatment rollers (rollers),
- wherein in the conveying direction F before or immediately before the roll or the roll aggregate
- and / or in the conveying direction F behind or immediately behind the roller or the roller assembly
Nach sehr empfohlener Ausführungsform der Erfindung wird eine Vliesbahn mit einem Flächengewicht kleiner 20 g/m2, vorzugsweise kleiner 15 g/m2 und bevorzugt kleiner 10 g/m2 gefördert. Bei Flächengewichten unter 20 g/m2, insbesondere bei Flächengewichten unter 15 g/m2 und vor allem bei Flächengewichten unter 10 g/m2 hat sich die Erfindung ganz besondere bewährt. - Vliesbahn meint im Rahmen der Erfindung im Übrigen eine Vliesbahn aus nur einer Filamentablage oder aber auch ein Vliesbahn-Laminat aus mehreren Filamentablagen.According to a highly recommended embodiment of the invention, a nonwoven web having a basis weight of less than 20 g / m 2 , preferably less than 15 g / m 2 and preferably less than 10 g / m 2 is conveyed. At basis weights below 20 g / m 2 , especially at basis weights below 15 g / m 2 and especially at basis weights below 10 g / m 2 , the invention has proven very special. Nonwoven web means in the context of the invention, moreover, a nonwoven web of only one Filamentablage or even a nonwoven web laminate of several Filamentablagen.
Erfindungsgemäß werden als Kunststoff-Fasern Kunststoff-Endlosfilamente eingesetzt. Vliesbahnen aus Endlosfilamenten zeichnen sich durch ganz besondere aerodynamische Eigenschaften aus und unterscheiden sich diesbezüglich deutlich von Vliesbahnen aus Kurzfasern. Zweckmäßigerweise werden im Rahmen der Erfindung Kunststoff-Fasern bzw. Kunststoff-Endlosfilamente aus thermoplastischem Kunststoff eingesetzt.According to the invention, plastic filaments are used as plastic fibers. Nonwoven webs made of continuous filaments are characterized by very particular aerodynamic properties and in this respect differ significantly from nonwoven webs of short fibers. Conveniently, plastic fibers or plastic filaments made of thermoplastic material are used in the context of the invention.
Eine bevorzugte Ausführungsform des erfindungsgemäßen Verfahrens ist dadurch gekennzeichnet, dass als Vliesbahn zumindest eine Spunbond-Vliesbahn und /oder zumindest eine Meltblown-Vliesbahn eingesetzt wird. Diese Arten von Vliesbahnen haben sich im Rahmen des erfindungsgemäßen Verfahrens und auch in der erfindungsgemäßen Vliesbahn-Führungsvorrichtung besonders bewährt. Spunbond-Vliesbahnen und/oder Meltblown-Vliesbahnen zeichnen sich bei Luftbeaufschlagung bzw. bei aerodynamischer Beeinflussung durch spezielle Eigenschaften aus und sie können im Rahmen des erfindungsgemäßen Verfahrens bzw. mit der erfindungsgemäßen Vliesbahn-Führungsvorrichtung besonders funktionssicher und störungsfrei gefördert werden. Gemäß einer Ausführungsform der Erfindung entspricht die geförderte Vliesbahn einem Laminat aus zumindest einer Spunbond-Vliesbahn und zumindest einer Meltblown-Vliesbahn. Besonders geeignet ist auch ein Laminat mit der Schichtenfolge Spunbond-Vliesbahn/Meltblown-Vliesbahn /Spunbond-Vliesbahn (SMS-Laminat).A preferred embodiment of the method according to the invention is characterized in that at least one spunbond nonwoven web and / or at least one meltblown nonwoven web is used as the nonwoven web. These types of nonwoven webs have proven particularly useful in the context of the method according to the invention and also in the nonwoven web guiding device according to the invention. Spunbond nonwoven webs and / or meltblown nonwoven webs are characterized by special properties when exposed to air or when aerodynamically influenced, and they can be conveyed in a particularly functional and trouble-free manner within the scope of the method according to the invention or with the nonwoven web guiding device according to the invention. According to one embodiment of the invention, the conveyed nonwoven web corresponds to a laminate of at least one spunbond nonwoven web and at least one meltblown nonwoven web. Also particularly suitable is a laminate having the layer sequence spunbond nonwoven web / meltblown nonwoven web / spunbond nonwoven web (SMS laminate).
Nach einer empfohlenen Ausführungsform der Erfindung ist zumindest eine Stabilisierungsplatte in Förderrichtung vor einer Walze bzw. vor einem Walzenaggregat angeordnet. Dabei liegt es im Rahmen der Erfindung, dass die Vliesbahn in Förderrichtung F vor der Walze bzw. vor dem Walzenaggregat über einen ersten Förderabschnitt frei bzw. im Wesentlichen frei geführt wird und wobei in diesem ersten Förderabschnitt zumindest eine Stabilisierungsplatte vor bzw. untermittelbar vor der Walze bzw. dem Walzenaggregat angeordnet ist. Freie Führung der Vliesbahn meint hier und nachfolgend insbesondere, dass die Vliesbahn in diesem Förderabschnitt nicht durch Walzen bzw. Walzenaggregate geführt / behandelt wird und zweckmäßigerweise auch nicht mittels einer Ablagevorrichtung bzw. mittels eines Ablagesiebbandes geführt wird. Bei der vorgenannten Ausführungsform kann die zumindest eine Stabilisierungsplatte unterhalb der Vliesbahn und/oder oberhalb der Vliesbahn angeordnet sein. Bei einer unterhalb der Vliesbahn angeordneten Stabilisierungsplatte wird der Abstand a zwischen der Oberseite der Stabilisierungsplatte und der Unterseite der Vliesbahn gemessen und bei einer oberhalb der Vliesbahn angeordneten Stabilisierungsplatte wird der Abstand a zwischen der Unterseite der Stabilisierungsplatte und der Oberseite der Vliesbahn gemessen.According to a recommended embodiment of the invention, at least one stabilizing plate is arranged in the conveying direction in front of a roll or in front of a roll aggregate. It is within the scope of the invention that the nonwoven web in the conveying direction F in front of the roller or in front of the roller unit via a first conveyor section is free or substantially free and wherein in this first conveyor section at least one stabilizing plate before or untermittelbar before the roller or the roller unit is arranged. Free guidance of the nonwoven web here and below means, in particular, that the nonwoven web is not guided / treated by rollers or roll aggregates in this conveying section and expediently also is not guided by means of a depositing device or by means of a filing screen belt. In the aforementioned embodiment, the at least one stabilization plate can be arranged below the nonwoven web and / or above the nonwoven web. In a stabilizing plate arranged below the nonwoven web, the distance a between the upper side of the stabilizing plate and the underside of the nonwoven web is measured, and at a stabilizing plate arranged above the nonwoven web, the distance a between the underside of the stabilizing plate and the upper side of the nonwoven web is measured.
Gemäß einer weiteren bevorzugten Ausführungsform der Erfindung wird die Vliesbahn in Förderrichtung F hinter einer Walze bzw. hinter einem Walzenaggregat über einen zweiten Förderabschnitt frei bzw. im Wesentlichen frei gefördert und in diesem zweiten Förderabschnitt ist zumindest eine Stabilisierungsplatte hinter bzw. unmittelbar hinter der Walze bzw. dem Walzenaggregat angeordnet. Dabei kann die zumindest eine Stabilisierungsplatte unterhalb der Vliesbahn und/oder oberhalb der Vliesbahn positioniert sein.According to a further preferred embodiment of the invention, the nonwoven web is conveyed freely or essentially freely in the conveying direction F behind a roll or behind a roll aggregate via a second conveying section and in this second conveying section at least one stabilizing plate behind or immediately behind the roll or the roller unit arranged. In this case, the at least one stabilization plate can be positioned below the nonwoven web and / or above the nonwoven web.
Es liegt im Rahmen der Erfindung, dass die Vliesbahn in Förderrichtung F vor einer Walze bzw. vor einem Walzenaggregat über einen ersten Förderabschnitt frei bzw. im Wesentlichen frei geführt wird und dass in diesem ersten Förderabschnitt zumindest eine Stabilisierungsplatte vor bzw. untermittebar vor der Walze bzw. dem Walzenaggregat angeordnet ist und dass die Vliesbahn in Förderrichtung F hinter der Walze bzw. dem Walzenaggregat über einen zweiten Förderabschnitt frei bzw. im Wesentlichen frei gefördert wird und dass in diesem zweiten Förderabschnitt zumindest eine Stabilisierungsplatte hinter bzw. unmittelbar hinter der Walze bzw. dem Walzenaggregat positioniert ist.It is within the scope of the invention that the nonwoven web is guided freely or essentially freely in the conveying direction F in front of a roll or in front of a roll aggregate and in this first conveying section at least one stabilizing plate before or below the roll or before the roll is arranged in the roller assembly and that the nonwoven web is conveyed freely or substantially freely in the conveying direction F behind the roller or the roller assembly via a second conveyor section and that in this second conveyor section at least one stabilizing plate behind or immediately behind the roller or the Roller unit is positioned.
Walzenaggregat meint im Rahmen der Erfindung zumindest zwei mit ihren Walzenachsen übereinander angeordnete Walzen. Dabei kann es sich um Führungswalzen und/oder Behandlungswalzen handeln. - Nach einer empfohlenen Ausführungsform der Erfindung umfasst ein Walzenaggregat zwei mit Abstand zueinander übereinander angeordnete Walzen und zweckmäßigerweise wird die Vliesbahn S-förmig über bzw. durch dieses Walzenaggregat geführt (im Sinne eines S-Walzenabzugs). Dabei kann die Vliesbahn zunächst über die obere Walze des Walzenaggregates geführt oder zuerst an der unteren Walze des Walzenaggregates vorbeigeführt werden. Gemäß bevorzugter Ausführungsform wird die Vliesbahn zunächst über die obere Walze des Walzenaggregates und anschließend um die untere Walze des Walzenaggregates geführt.Roller assembly means in the context of the invention at least two rollers arranged one above the other with their roller axes. These may be guide rollers and / or treatment rollers. - According to a recommended embodiment of the invention, a roller assembly comprises two spaced-apart superposed rollers and advantageously the nonwoven web is guided in an S-shape over or through this roller assembly (in the sense of an S-roll take-off). In this case, the nonwoven web can first be guided over the upper roll of the roll aggregate or first passed past the lower roll of the roll aggregate. According to a preferred embodiment, the nonwoven web is first passed over the upper roll of the roll aggregate and then around the lower roll of the roll aggregate.
Nach einer ersten Ausführungsform ist in dem ersten Förderabschnitt vor bzw. unmittelbar vor dem oben beschriebenen Walzenaggregat (S-Walzenaggregat) zumindest eine bzw. eine Stabilisierungsplatte unterhalb der geförderten bzw. frei geförderten Vliesbahn angeordnet. Vorzugsweise ist dabei in Förderrichtung hinter diesem Walzenaggregat und besonders bevorzugt unmittelbar hinter der oberen Walze dieses Walzenaggregates zumindest ein flächiges Umlenkelement zur Ablenkung der an der Oberfläche der geförderten Vliesbahn mitgeförderten Luft vorgesehen. Dabei lenkt das flächige Umlenkelement bevorzugt die von der Vliesbahnoberfläche mitgeförderte Luft nach oben hin.According to a first embodiment, in the first conveying section before or immediately before the above-described roller assembly (S-roller assembly) at least one or a stabilizing plate below the funded or freely conveyed nonwoven web arranged. Preferably, at least one planar deflecting element for deflecting the air conveyed on the surface of the conveyed nonwoven web is provided in the conveying direction behind this roll aggregate and particularly preferably directly behind the upper roll of this roll aggregate. In this case, the planar deflecting element preferably directs the air conveyed along by the nonwoven web surface upwards.
Eine Variante der vorstehend erläuterten ersten Ausführungsform ist dadurch gekennzeichnet, dass zusätzlich zu der vor dem Walzenaggregat (S-Walzenaggregat) und unterhalb der Vliesbahn angeordneten Stabilisierungsplatte zumindest eine zusätzliche Stabilisierungsplatte bzw. eine zusätzliche Stabilisierungsplatte in einem zweiten Förderabschnitt hinter bzw. unmittelbar hinter dem Walzenaggregat angeordnet ist. Dabei kann diese Stabilisierungsplatte oberhalb der geförderten Vliesbahn oder unterhalb der geförderten Vliesbahn angeordnet sein. In beiden Fällen kann die hinter dem Walzenaggregat weiter geführte Vliesbahn in Bezug auf Luftströmungseinflüsse stabilisiert werden, die aus mit der Vliesbahn über das Walzenaggregat geförderter Luft resultieren.A variant of the first embodiment explained above is characterized in that, in addition to the stabilizing plate arranged in front of the roll aggregate (S-roll aggregate) and below the nonwoven web, at least one additional stabilizing plate or an additional stabilizing plate is arranged in a second conveying section behind or behind the roll aggregate is. In this case, this stabilizing plate can be arranged above the conveyed nonwoven web or below the conveyed nonwoven web. In both cases, the nonwoven web further guided behind the roll aggregate can be stabilized with respect to air flow effects resulting from air conveyed with the nonwoven web via the roll aggregate.
Eine zweite Ausführungsform der Erfindung zeichnet sich dadurch aus, dass in dem ersten Förderabschnitt vor dem bzw. unmittelbar vor dem oben beschriebenen Walzenaggregat (S-Walzenaggregat) zumindest eine Stabilisierungsplatte bzw. eine Stabilisierungsplatte oberhalb der Vliesbahn angeordnet ist. Zweckmäßigerweise ist bei dieser Ausführungsform zumindest ein flächiges Umlenkelement unterhalb der Vliesbahn und bevorzugt auch unter der genannten Stabilisierungsplatte angeordnet. Empfohlenermaßen ist dieses zumindest eine flächige Umlenkelement bezüglich der Förderrichtung am Ende der Stabilisierungsplatte unterhalb der Vliesbahn bzw. unterhalb der Stabilisierungsplatte angeordnet. Es liegt im Rahmen der Erfindung, dass mit diesem flächigen Umlenkelement an der Unterseite der Vliesbahn mitgeförderte Luft umgelenkt wird und zwar zweckmäßigerweise von der Vliesbahn weg nach unten hin umgelenkt wird. Dazu ist das flächige Umlenkelement bevorzugt gebogen ausgebildet und der Bogen erstreckt sich zweckmäßigerweise von der Unterseite der Vliesbahn nach unten hin.A second embodiment of the invention is characterized in that at least one stabilizing plate or stabilizing plate is arranged above the nonwoven web in the first conveying section before or immediately before the above-described roller aggregate (S roller aggregate). Conveniently, in this embodiment, at least one planar deflecting element below the nonwoven web and preferably also arranged below said stabilizing plate. Empfohlenermaßen this is arranged at least one planar deflecting element with respect to the conveying direction at the end of the stabilizing plate below the nonwoven web or below the stabilizing plate. It is within the scope of the invention that with this two-dimensional Deflection element is deflected at the bottom of the nonwoven web mitgeförderte air and although expediently is deflected away from the nonwoven web downwards. For this purpose, the planar deflecting element is preferably formed curved and the arc extends suitably from the bottom of the nonwoven web downwards.
Eine weitere bewährte Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass zumindest zwei Behandlungswalzen - vorzugsweise zwei Behandlungswalzen - mit ihren Achsen bevorzugt unmittelbar übereinander angeordnet sind und dass lediglich ein enger Behandlungsspalt (sogenannter Nip) zwischen den beiden Behandlungswalzen vorhanden ist. Die Vliesbahn wird durch diesen Behandlungsspalt (Nip) geführt und vorzugsweise beaufschlagen dabei beide Behandlungswalzen die Vliesbahn, und zwar von oben und von unten aus. Empfohlenermaßen handelt es sich bei den Behandlungswalzen um Kompaktierwalzen oder um Kalanderwalzen. Das Aggregat aus den zumindest zwei Behandlungswalzen wird hier und nachfolgend als Behandlungswalzenaggregat bezeichnet. Ein solches Behandlungswalzenaggregat weist also zweckmäßigerweise einen Behandlungsspalt bzw. Nip auf, durch den die geförderte Vliesbahn geführt wird.A further proven embodiment of the invention is characterized in that at least two treatment rollers - preferably two treatment rollers - with their axes are preferably arranged directly above one another and that only a narrow treatment gap (so-called nip) is present between the two treatment rollers. The nonwoven web is guided through this nip and preferably both treatment rollers act on the nonwoven web, from above and from below. It is recommended that the treatment rollers are compaction rollers or calender rollers. The aggregate of the at least two treatment rollers is referred to here and below as a treatment roller assembly. Such a treatment roller assembly thus expediently has a treatment gap or nip through which the conveyed nonwoven web is guided.
Eine erste erfindungsgemäße Ausführungsvariante mit diesem Behandlungsaggregat ist dadurch gekennzeichnet, dass in Förderrichtung F der Vliesbahn zumindest eine Stabilisierungsplatte - bevorzugt eine Stabilisierungsplatte - vor bzw. unmittelbar vor dem Walzenaggregat angeordnet ist und nach empfohlener Ausführungsform oberhalb der Vliesbahn positioniert ist. Dabei kann die Vliesbahn nach einer Variante statt freigeführt zu werden auch auf einer Ablagevorrichtung bzw. auf einem Ablagesiebband aufliegen und die Stabilisierungsplatte ist dann zweckmäßigerweise über der Ablagevorrichtung bzw. über dem Ablagesiebband angeordnet, so dass die geförderte Vliesbahn sich zwischen Ablagevorrichtung bzw. Ablagesiebband und darüber angeordneter Stabilisierungsplatte befindet. Die Stabilisierungsplatte ist mit einem Abstand a oberhalb der geförderten Vliesbahn positioniert.A first variant of the invention with this treatment unit is characterized in that in the conveying direction F of the nonwoven web at least one stabilizing plate - preferably a stabilizing plate - is arranged before or immediately before the roller assembly and is positioned above the nonwoven web according to the recommended embodiment. In this case, the nonwoven web according to a variant instead of being released also rest on a storage device or on a Ablagesiebband and the stabilizing plate is then conveniently arranged above the storage device or on the Ablagesiebband so that the funded nonwoven web itself between storage device or Ablagesiebband and arranged above stabilization plate. The stabilization plate is positioned at a distance a above the conveyed nonwoven web.
Eine zweite erfindungsgemäße Ausführungsvariante mit dem Behandlungswalzenaggregat zeichnet sich dadurch aus, dass in Förderrichtung F der Vliesbahn vor bzw. unmittelbar vor dem Behandlungswalzenaggregat eine Stabilisierungsplatte oberhalb der Vliesbahn und eine Stabilisierungsplatte unterhalb der Vliesbahn angeordnet ist. Dabei wird die geförderte Vliesbahn zumindest bereichsweise durch einen Zwischenspalt zwischen der unterhalb der Vliesbahn angeordneten Stabilisierungsplatte und der oberhalb der Vliesbahn positionierten Stabilisierungsplatte geführt. Es liegt im Rahmen der Erfindung, dass bei dieser Ausführungsvariante die Enden der Stabilisierungsplatten in vertikaler Richtung fluchten bzw. im Wesentlichen fluchten. Es kann aber auch ein Versatz bzw. ein geringer Versatz zwischen den Stabilisierungsplatten realisiert sein. Durch die unterhalb und oberhalb der Vliesbahn angeordneten Stabilisierungsplatten kann die durch die Bewegung der Vliesbahn hervorgerufene Luftströmung reduziert bzw. größtenteils in Bereiche abgeleitet werden, in der sie nicht stört.A second variant of the invention with the treatment roller assembly is characterized in that in the conveying direction F of the nonwoven web before or immediately before the treatment roller assembly, a stabilizing plate above the nonwoven web and a stabilizing plate is disposed below the nonwoven web. In this case, the conveyed nonwoven web is guided, at least in regions, through an intermediate gap between the stabilizing plate arranged below the nonwoven web and the stabilizing plate positioned above the nonwoven web. It is within the scope of the invention that in this embodiment, the ends of the stabilizing plates are aligned in the vertical direction or substantially aligned. However, it is also possible for an offset or a small offset to be realized between the stabilization plates. By means of the stabilizing plates arranged below and above the nonwoven web, the air flow caused by the movement of the nonwoven web can be reduced or largely diverted into areas in which it does not interfere.
Gemäß einer Ausführungsform der Erfindung weist eine Stabilisierungsplatte an ihrer der Vliesbahn zugewandten Oberfläche eine Mehrzahl von Nuten auf, wobei die Nuten nach einer Ausführungsvariante zumindest teilweise parallel zueinander ausgerichtet sein können. Die Nuten können beispielsweise auch in einem Fischgrätmuster angeordnet sein. Mit Hilfe dieser in der Oberfläche der Stabilisierungsplatte vorgesehenen Nuten können die Reibungskräfte zwischen der bewegten Vliesbahn und der bevorzugt nicht bewegten Stabilisierungsplatte reduziert werden. Mittels der Nuten können aus der Bewegung der Vliesbahn resultierende Luftströmungen bzw. Luftschichten abgeleitet werden. - Eine Ausführungsform der Erfindung ist dadurch gekennzeichnet, dass in einer Stabilisierungsplatte Öffnungen bzw. Druckausgleichsöffnungen angeordnet sind. Diese Öffnungen bzw. Druckausgleichsöffnungen können im Bereich bzw. in den Nuten positioniert werden. Es ist möglich, dass Luft durch die Druckausgleichsöffnungen aus dem Zwischenbereich zwischen Vliesbahn und Stabilisierungsplatte angesaugt wird. Es liegt im Rahmen der Erfindung, dass durch die Anzahl und die Anordnung der Nuten und/oder durch die Anzahl und die Anordnung der Druckausgleichsöffnungen die Luftströmungen zwischen Vliesbahn und Stabilisierungsplatte in vorteilhafter Weise eingestellt bzw. beeinflusst werden können.According to one embodiment of the invention, a stabilization plate on its surface facing the nonwoven web has a plurality of grooves, wherein the grooves according to a variant embodiment may be aligned at least partially parallel to each other. The grooves may for example also be arranged in a herringbone pattern. By means of these grooves provided in the surface of the stabilizing plate, the frictional forces between the moving nonwoven web and the preferably non-moving stabilizing plate can be reduced. By means of the grooves, air flows or air layers resulting from the movement of the nonwoven web can be discharged. - One Embodiment of the invention is characterized in that openings or pressure compensation openings are arranged in a stabilizing plate. These openings or pressure compensation openings can be positioned in the region or in the grooves. It is possible that air is sucked through the pressure equalization openings from the intermediate area between nonwoven web and stabilizing plate. It is within the scope of the invention that the air flows between nonwoven web and stabilizing plate can be adjusted or influenced in an advantageous manner by the number and arrangement of the grooves and / or by the number and arrangement of the pressure equalization openings.
Es wurde bereits oben angedeutet, dass nach bevorzugter Ausführungsform der Erfindung außer mit zumindest einer Stabilisierungsplatte mit zumindest einem weiteren Stabilisierungselement gearbeitet wird, wobei das Stabilisierungselement zweckmäßigerweise als flächiges Umlenkelement ausgebildet ist. Mittels eines solchen flächigen Umlenkelementes kann die von der geförderten Vliesbahn an der Vliesbahnoberfläche mitgeförderte Luft auf effektive Weise von der Vliesbahnoberfläche umgelenkt bzw. weggelenkt werden. Das flächige Umlenkelement ist zweckmäßigerweise als flächiges Umlenkblech ausgebildet. Ein solches flächiges Umlenkelement wird oberhalb und/oder unterhalb der geförderten Vliesbahn angeordnet, so dass von der Vliesbahnoberseite mitgeführte Luft und/oder von der Vliesbahnunterseite mitgeführte Luft mit Hilfe des flächigen Umlenkelementes bzw. flächigen Umlenkbleches von der Vliesbahnoberfläche weggelenkt werden kann. Beispiele dafür werden in der Figurenbeschreibung näher erläutert.It has already been indicated above that according to a preferred embodiment of the invention except for working with at least one stabilizing plate with at least one further stabilizing element, wherein the stabilizing element is expediently designed as a planar deflecting element. By means of such a planar deflecting element, the air conveyed by the conveyed nonwoven web on the nonwoven web surface can be deflected or deflected away from the nonwoven web surface in an effective manner. The flat deflecting element is expediently designed as a flat deflecting plate. Such a flat deflecting element is arranged above and / or below the conveyed nonwoven web, so that air entrained by the nonwoven web top side and / or entrained air from the nonwoven web underside can be deflected away from the nonwoven web surface with the aid of the planar deflecting element or planar deflecting plate. Examples for this are explained in more detail in the description of the figures.
Nach bevorzugter Ausführungsform des erfindungsgemäßen Verfahrens wird die geförderte Vliesbahn mit einer Fördergeschwindigkeit größer 600 m/min, bevorzugt größer 700 m/min und besonders bevorzugt größer 750 m/min gefördert. - Es liegt im Rahmen der Erfindung, dass die geförderte Vliesbahn im Bereich einer Stabilisierungsplatte bzw. im Bereich zumindest einer Stabilisierungsplatte gasbeaufschlagungsfrei und somit luftbeaufschlagungsfrei sowie dampfbeaufschlagungsfrei geführt wird. Zweckmäßigerweise wird also die Vliesbahn nicht gezielt bzw. nicht künstlich mit einem Gas und somit nicht mit Luft oder Dampf beaufschlagt.According to a preferred embodiment of the method according to the invention, the conveyed nonwoven web is conveyed at a conveying speed of greater than 600 m / min, preferably greater than 700 m / min and particularly preferably greater than 750 m / min. It is within the scope of the invention that the conveyed nonwoven web in the region of a stabilizing plate or in the region of at least one stabilizing plate is guided free of gas loading and thus free of any air impingement and free of steam. Conveniently, therefore, the nonwoven web is not specifically or not artificially charged with a gas and thus not with air or steam.
Es liegt im Rahmen der Erfindung, dass zumindest eine Zuführungseinrichtung für die geförderte Vliesbahn vorhanden ist, wobei zumindest eine Führungs- und/oder Behandlungswalze (Walze) für die Vliesbahn bzw. zumindest ein Walzenaggregat aus zumindest zwei Führungs- walzen und/oder Behandlungswalzen (Walzen) für die Vliesbahn in Förderrichtung der Vliesbahn hinter der Zuführungseinrichtung angeordnet ist, wobei in Förderrichtung F vor bzw. unmittelbar vor der Walze bzw. dem Walzenaggregat und/oder in Förderrichtung F hinter bzw. unmittelbar hinter der Walze bzw. dem Walzenaggregat zumindest eine sich in Förderrichtung F und quer zur Förderrichtung F der Vliesbahn erstreckende Stabilisierungsplatte vorgesehen ist.It is within the scope of the invention that at least one feed device for the conveyed nonwoven web is present, wherein at least one guide and / or treatment roll (roller) for the nonwoven web or at least one roller assembly of at least two guide rollers and / or treatment rollers (rollers ) is arranged for the nonwoven web in the conveying direction of the nonwoven web behind the supply device, wherein in the conveying direction F before or immediately before the roller or the roller assembly and / or in the conveying direction F behind or immediately behind the roller or the roller assembly at least one in Conveying direction F and transverse to the conveying direction F of the nonwoven web extending stabilizing plate is provided.
Gemäß empfohlener Ausführungsform beträgt der kürzeste Abstand A1 zwischen dem walzenseitigen Stirnende einer in Förderrichtung F vor der Walze bzw. vor dem Walzenaggregat angeordneten Stabilisierungsplatte und der der Stabilisierungsplatte in Förderrichtung nachgeschalteten Walze bzw. ersten Walze 0,2 bis 500 mm, vorzugsweise 0,2 bis 200 mm beträgt, bevorzugt 0,2 bis 100 mm und besonders bevorzugt 0,2 bis 50 mm. Nach einer Ausführungsform beläuft sich der Abstand A1 auf 0,2 bis 40 mm.According to the recommended embodiment, the shortest distance A 1 between the roller-side end of a arranged in the conveying direction F before the roller or before the roll aggregate stabilizing plate and the stabilizing plate downstream in the conveying direction roller or first roller 0.2 to 500 mm, preferably 0.2 to 200 mm, preferably 0.2 to 100 mm and particularly preferably 0.2 to 50 mm. According to one embodiment, the distance A 1 amounts to 0.2 to 40 mm.
Alternativ oder zusätzlich zu dieser Ausführungsform beträgt empfohlenermaßen der kürzeste Abstand A2 zwischen dem walzenseitigen Ende einer in Förderrichtung F hinter der Walze bzw. hinter dem Walzenaggregat angeordneten Stabilisierungsplatte und der der Stabilisierungsplatte in Förderrichtung vorgeschalteten Walze bzw. letzten Walze des Walzenaggregates 0,2 bis 500 mm, vorzugsweise 0,2 bis 150 mm, bevorzugt 0,2 bis 100 mm.Alternatively or in addition to this embodiment, it is recommended that the shortest distance A 2 between the roller-side end of a in the conveying direction F behind the roller or behind the roller assembly arranged stabilizing plate and the stabilizing plate in the conveying direction upstream roller or last roll of the roll unit 0.2 to 500 mm, preferably 0.2 to 150 mm, preferably 0.2 to 100 mm.
Bei der im Rahmen der Erfindung eingesetzten Zuführungseinrichtung für die Zuführung der Vliesbahn kann es sich beispielsweise um ein Förderband bzw. um ein Förderband eines Ablagesiebbandes oder eine andere Ablagevorrichtung handeln, die die Vliesbahn in Förderrichtung F fördert. Grundsätzlich kann aber auch eine beliebige Einrichtung eingesetzt werden, mit deren die Hilfe die Vliesbahn in Förderrichtung F bewegt werden kann.The feeding device for feeding the nonwoven web used in the context of the invention may, for example, be a conveyor belt or a conveyor belt of a storage screen belt or another depositing device which conveys the nonwoven web in the conveying direction F. In principle, however, it is also possible to use any device with which the aid can move the nonwoven web in the conveying direction F.
Es liegt im Rahmen der Erfindung, dass ein Walzenaggregat aus zumindest zwei Führungswalzen vorgesehen ist, wobei die beiden Führungswalzen mit der Maßgabe angeordnet sind, dass die geförderte Vliesbahn zunächst über eine obere Führungswalze geführt wird und im Anschluss daran an einer unterhalb der oberen Walze angeordneten unteren Führungswalze geführt ist. Grundsätzlich kann die Führung auch umgekehrt sein, d.h. die geförderte Vliesbahn wird zunächst an der unteren Führungswalze entlanggeführt und im Anschluss daran über die obere Führungswalze geführt.It is within the scope of the invention that a roller assembly is provided from at least two guide rollers, wherein the two guide rollers are arranged with the proviso that the funded nonwoven web is first passed over an upper guide roller and subsequently thereto at a lower roller arranged below the upper Guide roller is guided. In principle, the guidance may also be reversed, i. The conveyed nonwoven web is first passed along the lower guide roller and then passed over the upper guide roller.
Gemäß einer weiteren oben bereits angesprochenen Ausführungsvariante weist das Walzenaggregat zumindest zwei Behandlungswalzen auf, wobei die Behandlungswalzen mit der Maßgabe angeordnet sind, dass die geförderte Vliesbahn durch einen Behandlungsspalt (Nip bzw. Behandlungsnip) zwischen den beiden Behandlungswalzen hindurchgeführt wird.According to a further embodiment variant already mentioned above, the roller assembly has at least two treatment rollers, wherein the treatment rollers are arranged with the proviso that the conveyed nonwoven web is passed through a treatment nip or nip between the two treatment rollers.
Eine bevorzugte Ausführungsform der erfindungsgemäßen Führungsvorrichtung zeichnet sich dadurch aus, dass die zumindest eine Stabilisierungsplatte als stationäre Stabilisierungsplatte ausgeführt ist. Das bedeutet im Rahmen der Erfindung, dass die zumindest eine Stabilisierungsplatte bzw. dass die eingesetzten Stabilisierungsplatten im Betrieb der Führungsvorrichtung an ihrem Ort positioniert ist/sind und aus dieser Position nicht bewegt bzw. wegbewegt wird/werden. Andererseits liegt es aber auch im Rahmen der Erfindung, dass die zumindest eine Stabilisierungsplatte bzw. die Stabilisierungsplatten insbesondere außerhalb des Betriebes der Führungsvorrichtung bezüglich ihrer Position verstellbar bzw. fein justierbar ist/sind.A preferred embodiment of the guide device according to the invention is characterized in that the at least one stabilizing plate is designed as a stationary stabilizing plate. In the context of the invention, this means that the at least one stabilization plate or that the stabilization plates used are / is positioned at their location during operation of the guide device and are not moved or moved away from this position. On the other hand, however, it is also within the scope of the invention that the at least one stabilizing plate or the stabilizing plates in particular outside the operation of the guide device with respect to their position is adjustable or finely adjustable / are.
Es wurde bereits darauf hingewiesen, dass nach bewährter Ausführungsform der Erfindung neben der zumindest einen Stabilisierungsplatte zumindest ein Stabilisierungselement als flächiges Umlenkelement - vorzugsweise als flächiges Umlenkblech - ausgebildet ist. Empfohlenermaßen weist das flächige Umlenkelement bzw. das Umlenkblech eine mit geringem Abstand u zur Vliesbahnoberfläche angeordnete Umlenkzunge auf, wobei mittels der Umlenkzunge von der Vliesbahn an der Vliesbahnoberfläche mitgeförderte Luft über das flächige Umlenkelement von der Vliesbahnoberfläche umgelenkt bzw. weggelenkt wird.
Der Erfindung liegt die Erkenntnis zugrunde, dass mit dem erfindungsgemäßen Verfahren bzw. mit der erfindungsgemäßen Vliesbahn-Führungsvorrichtung eine optimale funktionssichere und störungsfreie Führung von Vliesbahnen möglich ist, und zwar insbesondere auch von Vliesbahnen mit geringer Dicke und mit geringem Flächengewicht. Der störende Einfluss von Luftströmungen kann mit Hilfe der erfindungsgemäßen Führungsmaßnahmen weitgehend reduziert bzw. minimiert werden, so dass ein unerwünschtes Flattern der Vliesbahn nicht mehr oder nur noch vernachlässigbar auftritt. Insgesamt kann das Laufverhalten der bewegten Vliesbahn im Vergleich zu vielen bekannten Verfahren und Führungsvorrichtungen beachtlich verbessert werden. Unerwünscht hohe Bahnzüge sind nicht erforderlich, so dass auch daraus resultierende unerwünschte Verringerungen der Vliesbahnbreite sowie unerwünschte Verringerungen der Festigkeit in Querrichtung der Vliesbahn nicht auftreten. Zu betonen ist, dass das erfindungsgemäße technische Problem mit verhältnismäßig einfachen und kostengünstigen Maßnahmen gelöst werden kann, und zwar überraschend effektiv und funktionssicher.It has already been pointed out that according to the proven embodiment of the invention, in addition to the at least one stabilizing plate, at least one stabilizing element is designed as a planar deflecting element, preferably as a flat deflecting plate. Empfohlenermaßen, the planar deflecting element or the deflecting plate arranged at a small distance u to the nonwoven web surface Umlenkzunge, wherein by means of the Umlenkzunge of the nonwoven web at the nonwoven web surface mitgeförderte air is deflected or deflected over the planar deflecting element of the nonwoven web surface.
The invention is based on the finding that with the method according to the invention or with the nonwoven web guiding device according to the invention an optimal functionally reliable and trouble-free guidance of nonwoven webs is possible, in particular also of nonwoven webs with a small thickness and with a low basis weight. The disturbing influence of air currents can be largely reduced or minimized with the aid of the guiding measures according to the invention, so that unwanted fluttering of the nonwoven web no longer occurs or occurs only negligibly. Overall, the running behavior of the moving nonwoven web can be remarkably improved in comparison to many known methods and guide devices. Undesirable high trains are not required, so even the resulting unwanted Reductions in nonwoven web width as well as undesirable reductions in cross direction strength of the nonwoven web do not occur. It should be emphasized that the technical problem according to the invention can be solved with relatively simple and cost-effective measures, namely surprisingly effective and reliable.
Nachfolgend wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert. Es zeigen in schematischer Darstellung:
- Fig. 1
- eine Vliesbahn-Führungsvorrichtung nach dem Stand der Technik,
- Fig. 2
- eine Vliesbahn-Führungsvorrichtung zur Durchführung des erfindungsgemäßen Verfahrens in einer ersten Ausführungsform,
- Fig. 3
- den Gegenstand nach
Fig. 2 in einer zweiten Ausführungsform, - Fig. 4
- den Gegenstand gemäß
Fig. 2 in einer dritten Ausführungsform, - Fig. 5
- den Gegenstand nach
Fig. 2 in einer vierten Ausführungsform, - Fig. 6
- eine Vliesbahn-Führungsvorrichtung mit einem Behandlungswalzenaggregat in einer ersten Ausführungsvariante,
- Fig. 7
- den Gegenstand nach
Fig. 6 in einer zweiten Ausführungsvariante und - Fig. 8
- den Gegenstand gemäß
Fig. 6 in einer dritten Ausführungsvariante.
- Fig. 1
- a nonwoven web guide device according to the prior art,
- Fig. 2
- a nonwoven web guiding device for carrying out the method according to the invention in a first embodiment,
- Fig. 3
- the object after
Fig. 2 in a second embodiment, - Fig. 4
- the object according to
Fig. 2 in a third embodiment, - Fig. 5
- the object after
Fig. 2 in a fourth embodiment, - Fig. 6
- a nonwoven web guide device with a treatment roller assembly in a first embodiment,
- Fig. 7
- the object after
Fig. 6 in a second embodiment and - Fig. 8
- the object according to
Fig. 6 in a third embodiment.
Die Figuren zeigen eine Vliesbahn- Führungsvorrichtung zur Durchführung des erfindungsgemäßen Verfahrens zur Führung einer in einer Förderrichtung F geförderten Vliesbahn 1 aus Kunststoff-Fasern. Bei den Kunststoff-Fasern handelt es sich bevorzugt und im Ausführungsbeispiel um Kunststoff-Endlosfilamente, wobei diese Kunststoff-Endlosfilamente zweckmäßigerweise aus thermoplastischem Kunststoff bestehen. Bei der Vliesbahn 1 mag es sich im Ausführungsbeispiel nach den Figuren um eine Spunbond-Vliesbahn handeln. Es liegt insbesondere im Rahmen der Erfindung, als Vliesbahn ein Vliesbahn-Laminat einzusetzen, wobei das Laminat dann bevorzugt zumindest eine Spunbond-Vliesbahn und eine Meltblown-Vliesbahn aufweist und besonders bevorzugt ein Laminat mit einer Schichtenfolge Spunbond-Vliesbahn/Meltblown-Vliesbahn/Spunbond-Vliesbahn (SMS) ist. Es liegt im Rahmen der Erfindung, dass die Vliesbahn 1 eine Bahndicke d kleiner 2 mm aufweist und bevorzugt ein Flächengewicht kleiner 20 g/m2, besonders bevorzugt kleiner 15 g/m2 aufweist. - Die Vliesbahn 1 kommt in Berührungskontakt mit Führungswalzen 2 und/oder Behandlungswalzen 3. Ein Führungswalzenaggregat 4 weist dabei eine Mehrzahl von Führungswalzen 2, vorzugsweise zwei Führungswalzen 2 auf und ein Behandlungsaggregat 5 weist eine Mehrzahl von Behandlungswalzen 3, bevorzugt zwei Behandlungswalzen 3 auf. Die
Die
Die
Die
Im Ausführungsbeispiel nach
Die
Auch im Ausführungsbeispiel nach der
Im Ausführungsbeispiel gemäß
Claims (9)
- Method for guiding a nonwoven web of plastic endless filaments conveyed in a conveying direction F,
wherein a nonwoven web having a web thickness d of less than 2 mm, preferably less than 1.5 mm and having a grammage of less than 30 g/m2, preferably less than 25 g/m2 is used,
wherein the nonwoven web is brought into touching contact with at least one guide and/or treatment roller (roller) or with at least one roller unit comprising at least two guide and/or treatment rollers (rollers),
wherein in the conveying direction F upstream of or immediately upstream of the roller or the roller unit
and/or in the conveying direction F downstream of or immediately downstream of the roller or the roller unit
at least one stabilizing plate extending in the conveying direction F or transversely to the conveying direction F of the nonwoven web is provided and wherein the nonwoven web is guided along the at least one stabilizing plate with the proviso that the distance a between the surface of the stabilizing plate facing the nonwoven web and the nonwoven web surface is 0 to 10 mm, preferably 0.1 to 5 mm. - The method according to claim 1, wherein a spunbond nonwoven web and/or a meltblown nonwoven web is used as nonwoven web.
- The method according to one of claims 1 or 2, wherein the nonwoven web is guided in the conveying direction F upstream of the roller or upstream of the roller unit via a first conveying section freely or substantially freely and wherein in the first conveying section at least one stabilizing plate is arranged upstream of or immediately upstream of the roller or the roller unit.
- The method according to one of claims 1 to 3, wherein the nonwoven web is conveyed in the conveying direction F downstream of the roller or the roller unit via a second conveying section freely or substantially freely and wherein in the second conveying section at least one stabilizing plate is arranged downstream of or immediately downstream of the roller or the roller unit.
- The method according to one of claims 1 to 4, wherein at least one stabilizing plate is provided underneath the nonwoven web and wherein the distance a between the upper side of the stabilizing plate and the underside of the nonwoven web is measured.
- The method according to one of claims 1 to 5, wherein at least one stabilizing plate is arranged above the nonwoven web and wherein the distance a between the underside of the stabilizing plate and the upper side of the nonwoven web is measured.
- The method according to one of claims 1 to 6, wherein in addition to the at least one stabilizing plate, at least one further stabilizing element is configured as a flat deflecting element, wherein by means of the deflecting element, air entrained by the nonwoven web at the nonwoven web surface is deflected or led away from the nonwoven web surface via the flat deflecting element.
- The method according to one of claims 1 to 7, wherein the nonwoven web is conveyed at a conveying speed greater than 600 m/min.
- The method according to one of claims 1 to 8, wherein the nonwoven web is guided free from exposure to gas in the area of a stabilizing plate or in the area of at least one stabilizing plate.
Priority Applications (18)
Application Number | Priority Date | Filing Date | Title |
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SI201531099T SI3372719T1 (en) | 2015-01-30 | 2015-01-30 | Nonwoven fabric guiding device |
EP15153315.5A EP3051013B1 (en) | 2015-01-30 | 2015-01-30 | Method for guiding a nonwoven web |
SI201530500T SI3051013T1 (en) | 2015-01-30 | 2015-01-30 | Method for guiding a nonwoven web |
ES15153315T ES2696453T3 (en) | 2015-01-30 | 2015-01-30 | Guiding procedure for a nonwoven web |
EP18158408.7A EP3372719B1 (en) | 2015-01-30 | 2015-01-30 | Nonwoven fabric guiding device |
PL18158408T PL3372719T3 (en) | 2015-01-30 | 2015-01-30 | Nonwoven fabric guiding device |
PL15153315T PL3051013T3 (en) | 2015-01-30 | 2015-01-30 | Method for guiding a nonwoven web |
ES18158408T ES2773997T3 (en) | 2015-01-30 | 2015-01-30 | Guide device for nonwoven fabric strips |
MX2016000875A MX365033B (en) | 2015-01-30 | 2016-01-21 | Method and apparatus for guiding a nonwoven web. |
ARP160100174A AR103590A1 (en) | 2015-01-30 | 2016-01-22 | PROCEDURE FOR THE GUIDE OF A WAY OF NON-FABRICED MATERIAL AND DEVICE GUIDE OF THE ROAD OF NON-WOVEN MATERIAL |
JP2016012408A JP6261628B2 (en) | 2015-01-30 | 2016-01-26 | Method and apparatus for guiding nonwoven webs |
MYPI2016700278A MY191306A (en) | 2015-01-30 | 2016-01-27 | Method and apparatus for guiding a nonwoven web |
BR102016001861-7A BR102016001861B1 (en) | 2015-01-30 | 2016-01-27 | Method for guiding a non-woven fabric web and non-woven fabric guide device |
IL243819A IL243819B (en) | 2015-01-30 | 2016-01-28 | Method and apparatus for guiding a nonwoven web |
US15/009,106 US10094058B2 (en) | 2015-01-30 | 2016-01-28 | Method and apparatus for guiding a nonwoven web |
KR1020160011502A KR101870502B1 (en) | 2015-01-30 | 2016-01-29 | Method and apparatus for guiding a nonwoven web |
RU2016103046A RU2634001C2 (en) | 2015-01-30 | 2016-01-29 | Method of nonwoven fabric guiding and guiding device |
CN201610060566.2A CN105836514B (en) | 2015-01-30 | 2016-01-29 | Method and apparatus for guiding adhesive-bonded fabric |
Applications Claiming Priority (1)
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EP15153315.5A EP3051013B1 (en) | 2015-01-30 | 2015-01-30 | Method for guiding a nonwoven web |
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EP18158408.7A Division EP3372719B1 (en) | 2015-01-30 | 2015-01-30 | Nonwoven fabric guiding device |
EP18158408.7A Division-Into EP3372719B1 (en) | 2015-01-30 | 2015-01-30 | Nonwoven fabric guiding device |
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EP3051013B1 true EP3051013B1 (en) | 2018-09-19 |
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EP18158408.7A Active EP3372719B1 (en) | 2015-01-30 | 2015-01-30 | Nonwoven fabric guiding device |
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US (1) | US10094058B2 (en) |
EP (2) | EP3051013B1 (en) |
JP (1) | JP6261628B2 (en) |
KR (1) | KR101870502B1 (en) |
CN (1) | CN105836514B (en) |
AR (1) | AR103590A1 (en) |
BR (1) | BR102016001861B1 (en) |
ES (2) | ES2773997T3 (en) |
IL (1) | IL243819B (en) |
MX (1) | MX365033B (en) |
MY (1) | MY191306A (en) |
PL (2) | PL3372719T3 (en) |
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SI (2) | SI3051013T1 (en) |
Families Citing this family (7)
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JP5859699B1 (en) * | 2015-05-28 | 2016-02-10 | 栗田煙草苗育布製造株式会社 | Composite sheet in which woven fabric and sheet-like structure are combined and integrated, and composite processing method |
EP3199671B1 (en) * | 2016-01-27 | 2020-03-04 | Reifenhäuser GmbH & Co. KG Maschinenfabrik | Device for manufacturing non-woven material |
CN111139598A (en) * | 2018-11-05 | 2020-05-12 | 苏州市朗腾工贸有限公司 | Thermoplastic elastomer non-woven fabric material and processing technology |
WO2020107422A1 (en) | 2018-11-30 | 2020-06-04 | The Procter & Gamble Company | Methods of creating soft and lofty nonwoven webs |
US11236448B2 (en) | 2018-11-30 | 2022-02-01 | The Procter & Gamble Company | Methods for producing through-fluid bonded nonwoven webs |
WO2020107421A1 (en) | 2018-11-30 | 2020-06-04 | The Procter & Gamble Company | Methods for through-fluid bonding nonwoven webs |
ES2886885T3 (en) * | 2019-07-30 | 2021-12-21 | Reifenhaeuser Masch | Device and method for the manufacture of a nonwoven material from fibers |
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EP3372719B1 (en) | 2019-11-20 |
MX2016000875A (en) | 2016-08-01 |
RU2634001C2 (en) | 2017-10-23 |
US20160222558A1 (en) | 2016-08-04 |
KR101870502B1 (en) | 2018-06-22 |
SI3051013T1 (en) | 2019-01-31 |
ES2696453T3 (en) | 2019-01-15 |
IL243819B (en) | 2020-01-30 |
SI3372719T1 (en) | 2020-04-30 |
CN105836514B (en) | 2018-11-06 |
BR102016001861A2 (en) | 2016-08-02 |
RU2016103046A (en) | 2017-08-03 |
JP2016141928A (en) | 2016-08-08 |
EP3372719A1 (en) | 2018-09-12 |
BR102016001861B1 (en) | 2022-03-29 |
JP6261628B2 (en) | 2018-01-17 |
PL3372719T3 (en) | 2020-06-15 |
IL243819A0 (en) | 2016-07-31 |
AR103590A1 (en) | 2017-05-24 |
ES2773997T3 (en) | 2020-07-16 |
EP3051013A1 (en) | 2016-08-03 |
CN105836514A (en) | 2016-08-10 |
PL3051013T3 (en) | 2019-05-31 |
MX365033B (en) | 2019-05-20 |
US10094058B2 (en) | 2018-10-09 |
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