EP2758217B1 - Method and device for perforating a non-woven fabric by means of hydrodynamic needling - Google Patents
Method and device for perforating a non-woven fabric by means of hydrodynamic needling Download PDFInfo
- Publication number
- EP2758217B1 EP2758217B1 EP12759416.6A EP12759416A EP2758217B1 EP 2758217 B1 EP2758217 B1 EP 2758217B1 EP 12759416 A EP12759416 A EP 12759416A EP 2758217 B1 EP2758217 B1 EP 2758217B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elevations
- woven fabric
- perforations
- carrier element
- liquid
- 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
- 239000004745 nonwoven fabric Substances 0.000 title claims description 59
- 238000000034 method Methods 0.000 title claims description 20
- 239000007788 liquid Substances 0.000 claims description 50
- 229910052751 metal Inorganic materials 0.000 claims description 45
- 239000002184 metal Substances 0.000 claims description 44
- 238000000576 coating method Methods 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 18
- 239000000835 fiber Substances 0.000 claims description 14
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000004746 geotextile Substances 0.000 claims description 4
- 230000032258 transport Effects 0.000 description 6
- 239000004744 fabric Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000002352 surface water Substances 0.000 description 2
- 238000004049 embossing Methods 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000010010 raising Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
- D04H1/492—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet
- D04H1/495—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres by fluid jet for formation of patterns, e.g. drilling or rearrangement
-
- 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
Definitions
- the invention relates to a device for perforating a nonwoven by means of hydrodynamic needling according to the preamble of claims 1 and a method for perforating a nonwoven by means of hydrodynamic needling according to claim 10.
- Previously known devices for perforating a nonwoven by means of hydrodynamic needling have at least a first carrier element with a first carrier surface.
- the first carrier surface has first elevations and first perforations as the drainage opening.
- the nonwoven to be processed can be placed on the carrier surface.
- fibers of the nonwoven fabric arranged on the carrier surface are washed down by the elevations, so that perforations are formed in the nonwoven fabric.
- Heavy nonwovens are often used as geotextiles. These often consist of a hydrophobic material, in particular staple fibers or endless Filaments made of PP or PET. However, in order to use the heavy nonwovens as geotextiles, some of them are additionally equipped with hydrophilic finishes for better drainage of surface water. According to the present invention, instead of the hydrophilic finish, drainage openings are to be introduced into such heavy nonwovens, wherein these drainage openings are to be introduced by means of hydrodynamic needling. This has the advantage that this is a simpler and less expensive process than the equipment with the hydrophilic finish.
- US 5441691 discloses a continuous, multi-phase process for perforating and embossing a substantially continuous web of substantially planar polymeric film to form a microapertured and microembossed polymeric web.
- the object of the present invention is to provide a device and a method for perforating a nonwoven fabric and to provide a method for producing a carrier element for a device for perforating a nonwoven, which makes it possible to heavy nonwovens with a basis weight of 70 g / m 2 perforate.
- the support elements are usually made of stainless sheet metal.
- the sheet has a relatively high toughness and the increase can only have certain shapes and dimensions.
- the increase in a stainless sheet can not be introduced by deep drawing. With such a stainless sheet, the height of the ridges may be less than one-half the diameter of the ridges.
- the advantage is that the sheet is first deep-drawn and thus increases of any shape and height can be produced.
- the durability of the carrier element is replaced by the coating.
- the ridges which are introduced into the sheet metal element may each have such a size and shape that a heavy fabric with a basis weight of at least 70 to 260 g / m 2 can be perforated during the hydrodynamic needling of the ridges, so that in the non-woven Perforations with an opening width of at least 4 mm arise.
- the elevations of the carrier element can have a polygonal, circular, semicircular or oval-shaped cross-sectional shape as base area.
- the perforations may also have a polygonal, circular, semicircular or oval cross-sectional shape in the nonwoven plane.
- the shape of the perforations in the fleece depends on the shape of the elevations in the carrier element.
- the shape of the perforations may additionally be e.g. be dependent on whether the nonwoven upon removal from the support element, e.g. in the transport direction stretches. In this case, oval perforations are formed in the mat, although the elevations of the support element have circular cross-sectional shapes.
- the opening width is the widest width of the respective opening.
- the opening width is the diameter.
- Oval, ie preferably elliptical perforations each have a maximum and a minimum diameter.
- the opening width is the largest diameter of the oval.
- the smallest width of the oval perforation is the smallest diameter.
- the invention advantageously provides that in a device for perforating a nonwoven by means of hydrodynamic needling, a second carrier element is provided which has a second carrier surface with second elevations and second perforations as a drainage opening, wherein on the one hand the elevation of the carrier element have such a distance from one another and on the other hand, the fleece provided with the perforations can be placed on the second carrier element, which project the elevations of the second carrier element into the perforations of the fleece arranged on the second carrier element, wherein at least one second jet bar projects see and wherein the fleece can be acted upon by means of a liquid emerging from the openings of the second nozzle bar under high pressure.
- the device has the advantage that in particular a heavy fleece with a weight per unit area of at least 70 g / m 2 , preferably at least 100 g / m 2 , can be perforated particularly well.
- a heavy fleece with a weight per unit area of at least 70 g / m 2 preferably at least 100 g / m 2
- the nonwoven is perforated again on a second carrier element, wherein the elevations of the second carrier element protrude into the already existing perforations, particularly well-trained and well-defined perforations can be formed in the web. In this way, even very heavy nonwovens up to 260 g / m 2 can be perforated.
- the nonwoven on the first carrier element can be placed on the first carrier element with a nonwoven upper side, and the nonwoven can be acted upon on a nonwoven underside by means of the liquid emerging from the openings of the first nozzle bellows.
- the nonwoven fabric can be placed on the second support element with the nonwoven underside and the nonwoven fabric can be acted upon by the nonwoven upper side by means of the liquid emerging from the openings of the second nozzle beam.
- the shape and the dimension of the respective elevations of the second carrier element can be selected such that the elevations of the second carrier element can protrude into the perforations of the nonwoven which can be placed on the second carrier element.
- the elevations preferably have a height of at least 3.5 mm.
- the elevations of the second carrier element must have a certain height, so that when placing the fleece on the second carrier element, the elevations of the second carrier element can protrude into the already existing perforation of the fleece. In this way, the web is again perforated on the second support member at the same locations and the perforations can be made stronger. If the raises of the second carrier element would not protrude exactly into the already existing perforations of the web, so further perforations would be formed in the web and the existing perforations would not be clearly defined perforations.
- the dimension and the shape of the elevations of the first and the second support member can so be chosen that heavy nonwovens are perforatable in the hydrodynamic needle punching by the elevations having a basis weight of 70 g / m 2, so that in the non-woven perforations having an opening of at least 4 mm, preferably at least 5 mm.
- the first and the second carrier element can each consist of a sheet metal element and a coating and the elevations in the respective sheet metal element can be introduced by means of deep drawing.
- the respective sheet metal elements may be coated by means of the coating.
- the dimensions and the shape of the increase of the first support element are chosen such that a heavy nonwoven with a basis weight of at least 70 g / m 2 is perforated in a hydrodynamic needling through the increase, so that in the nonwoven perforations having an opening width of at least 4 mm, preferably of at least 5 mm, wherein the first carrier element consists of a sheet metal element and a coating and the elevations in the sheet metal element by means of deep drawing can be introduced and coated by the coatings.
- the dimensions and the shape of the elevations of the first support member can so be chosen such that a heavy fabric with a surface weight of 70 g / m 2 can be perforated during the hydrodynamic needling of the ridges, so that in the non-woven perforations having a smallest width of at least 3 mm.
- the smallest width of a perforation is the smallest width of the perforation.
- the smallest width of the perforation is the smallest diameter.
- the respective sheet metal element may consist of a material having such a toughness that the elevations can be produced by deep drawing.
- the respective coating may consist of a material that has a higher toughness than the material of the respective sheet metal element.
- the respective coating may consist of a metal, preferably of nickel.
- the elevations of the first and / or second carrier element may have a diameter of at least 4 mm, preferably at least 5 mm, and the shape of the elevations may be selected such that a heavy nonwoven having a basis weight of at least 70 g / m 2 , preferably with a basis weight of 100 g / m 2 to 260 g / m 2 , perforable.
- the height of the elevations of the first and / or second carrier element may correspond to at least half the diameter of the elevations of the first and / or second carrier element.
- the increase of the first and / or second support element may have a diameter between 5 and 13 mm.
- the elevations of the first and / or second carrier element may have the form of thorns.
- the elevations of the first and / or second carrier element may be tapered or frusto-conical.
- the elevations of the first and / or second carrier element may have a circular, semi-circular, oval, or polygonal cross-sectional shape as base area.
- the first and / or second carrier element may each be a drum shell of a drum and the respective drum surface may be the surface of the respective drum shell.
- the first and / or second carrier element may be an endlessly circulating belt.
- the band can be a flexible metal band.
- This method has the advantage that even heavy nonwovens can be well perforated, with the perforations being clearly defined.
- the portion of the nonwoven fibers which have not been rinsed by the first ridges of the first support member upon first application of liquid may be rinsed by the second ridges of the second support member upon second fluid application.
- the fleece arranged with a fleece top side on the first carrier element can be supplied with liquid from a fleece underside and the fleece provided with perforations and arranged on the second carrier element can be supplied with liquid from a fleece top side.
- the fleece with the fleece underside is arranged on the carrier element.
- Perforations with an opening width of at least 5 mm can be produced in the fleece, the perforations having an opening width of at least 4 mm, preferably at least 5 mm, being produced in such a way that the dimensions and the shape of the elevations are chosen such that the Fibers of the nonwoven placed on the ridges upon application of liquid to flush liquid from the ridges.
- a geotextile can be made by the process of the present invention.
- the nonwoven produced according to the present invention consists of staple fibers of PP, PET, PA or other polymers or of endless filaments (spunbonded nonwoven) of PP or PET or other polymers.
- elevations are introduced into the sheet metal element by means of deep drawing.
- elevations can be introduced into the sheet-metal element which have a height such that perforations can also be introduced into a heavy fleece by means of these elevations.
- the coating has the advantage that the carrier element having the coating has a longer shelf life.
- the support elements are usually made of stainless sheet metal.
- the sheet has a relatively high toughness and the increase can only have certain shapes and dimensions.
- the increase in a stainless sheet can not be introduced by deep drawing. With such a stainless sheet, the height of the ridges may be less than one-half the diameter of the ridges.
- the ridges which are introduced into the sheet metal element may each have a dimension and shape such that a heavy nonwoven having a basis weight of at least 70 to 260 g / m 2 is perforable in the hydrodynamic needling by the ridges, so that in the web Perforations with an opening width of at least 4 mm arise.
- the elevations of the carrier element can have a polygonal, circular, semicircular or oval-shaped cross-sectional shape as base area.
- the perforations may also have a polygonal, circular, semicircular or oval cross-sectional shape in the nonwoven plane.
- the shape of the perforations in the fleece depends on the shape of the elevations in the carrier element.
- the shape of the perforations may additionally be dependent, for example, on whether the nonwoven stretches, for example, in the transport direction when removed from the carrier element. In this case oval perforations occur in the web, although the elevations of the carrier element have circular cross-sectional shapes.
- the opening width is the widest width of the respective opening.
- the opening width is the diameter.
- Ovals, i. preferably elliptical perforations each have a largest and a smallest diameter.
- the opening width is the largest diameter of the oval.
- the smallest width of the oval perforation is the smallest diameter.
- the ridges which are introduced into the sheet metal element may each have a dimension and shape such that a heavy nonwoven having a basis weight of at least 70 to 260 g / m 2 is perforable in the hydrodynamic needling by the ridges, so that in the web Perforations arise whose smallest width has at least 3 mm.
- the sheet metal element may consist of a material having such a toughness that the elevations in the sheet metal element by means of deep drawing can be introduced, wherein the material is preferably a metal.
- the sheet metal element has a toughness, in which the elevations are introduced by deep drawing in the sheet metal element, the elevations can be introduced with a simple and inexpensive process in the support element.
- the sheet metal element may be coated with a material having a higher toughness than the material of the sheet metal element. This has the advantage that the carrier element has a much longer durability.
- the sheet metal element can be coated with a metal, preferably nickel.
- the sheet metal element is preferably not made of nickel.
- Nickel has a too high strength, so that the elevations can not be introduced by deep drawing in the sheet metal element when the sheet metal element consists of nickel.
- Fig. 1 shows a device 1 for perforating a fleece 26, 28, 34 by means of hydrodynamic needling.
- a device 1 has at least a first carrier element 12.
- the carrier element 12 has a carrier surface 14, the first carrier surface 14 having first elevations 8 and first perforations 4 as a drainage opening.
- FIG. 1 illustrated support member 12 is the drum shell of a drum 16.
- a nonwoven 22 can be placed on the support member 12 .
- the ridges 8 and the perforations 4 are in FIG. 1 not shown. These are in the clipping in Fig. 2 shown in more detail.
- the first carrier element can be designed as a self-supporting drum.
- the drum may have a base drum 16 on which the first carrier element 12 is applied as an outer layer. This is in Fig. 2 a shown.
- the drum has a base drum 16 on which a support fabric 17 is arranged and wherein the first support element 12 is arranged on this support fabric. This is in Fig. 2 b shown.
- the device 1 also has a first nozzle bar 24. There may also be provided further nozzle bars 24 '.
- the first nozzle bar 24 has openings. From the openings, a liquid, preferably water, is discharged at high pressure. This liquid 30 passes as a liquid jet onto the nonwoven 26 arranged on the carrier element 12.
- the fibers of the fleece 26, which are located on the elevations 8, are washed down by the elevations 8. In this way, perforations are formed in the web.
- the liquid 30 then passes through the web and the perforations 4 of the first carrier element 12 used as a drainage opening into the interior of the drum. There, the liquid is removed and can be supplied to the nozzle bar 24 again.
- FIG. 2 It is shown that the nonwoven 26 is first arranged on the carrier surface 14 of the carrier element 12.
- the fleece 26 When the fleece 26 is exposed to the liquid 30, fibers which are located on the elevations 8 are washed away by them. This is also in Fig. 2 to recognize. There, the fibers in the right image area are already washed down by the elevations 8. Further, the web 28 provided with perforation 29 is solidified between the ridges 8 by the liquid 30. This goes out Fig. 2 characterized in that the already acted upon with liquid 30 fleece 28 has a smaller thickness than the not yet acted upon with liquid nonwoven 26th
- the dimension and the shape of the elevations 8 of the first carrier element 12 are preferably selected such that a heavy fleece with a basis weight of at least 70 g / m 2 in the hydrodynamic needling perforated by the elevations 8, so that in the web perforations 29 with an opening width of at least 5 mm.
- the first carrier element 12 is preferably made of a sheet metal element and a coating and the elevations are introduced by deep drawing in the sheet metal element and coated by the coating. This will be more in-depth with regard to Fig. 5 described.
- FIG. 3 Another device for perforating a nonwoven fabric by hydrodynamic needling is shown.
- the device 3 has the same as the device 1 from Fig. 1 a first carrier element 12, which is the support element 12 from Fig. 1 equivalent. Further, the same as in the device 1 from Fig. 1 a fleece 28 provided with perforations 29 is produced on the first carrier element 12 by application of a liquid 30.
- the device according to Fig. 3 further comprises a second support member 40 having a second support surface 42 with second elevations 8 'and second perforations 4'.
- the perforations 4 ' are also used as a drainage opening.
- the elevations 8 'of the second carrier element 40 have such a distance from one another and the fleece 28 provided with the perforations 29 can be placed on the second carrier element 40 such that the elevations 8' of the second carrier element 40 into the perforations 29 of the second Carrier element 40 arranged fleece 28 protrude.
- the elevations 8 'of the second carrier element preferably also have the same shape as the elevations of the first carrier element 12.
- the decisive factor is the distance between the elevations 8'. This is preferably the same as the distance between the elevations 8 of the first carrier element 12.
- the distance in the axis-parallel direction between the second elevation is the same as the distance in the axis-parallel direction between the first elevations.
- the perforated nonwoven 28 can be transported from the first support member 12 to the second support member 40 and are arranged on the formed as a drum support member 40 that the elevations 8 'of the second support member 40 project into the perforations 29 of the web 28.
- the second support member 40 is formed as a drum 44 and rotates in the direction of rotation 46 and transports the perforated fleece 28 in the transport direction 22nd
- the web 26 is pre-consolidated before being transported to the first carrier element 12 by means of liquid emerging from nozzle bar 30.
- the shape and the dimension of the elevations 8 'of the second carrier element 40 may be selected such that the elevations 8' of the second carrier element 40 are hineinragbar in the perforations 29 of the placed on the second support member 40 fleece 28, wherein the elevations 8 'is preferably a Have height that corresponds to about half the diameter of the increase, with a diameter of 7 mm, for example chosen a height of 3.5 mm.
- the elevations of the first and / or second carrier element 12, 40 may have a width or a diameter of 5 to 15 mm.
- the elevations 8, 8 'of the first and the second support element 12, 40 may have the form of thorns. Further, they may be tapered or frustoconical.
- the base of the elevations 8 and 8 ' can be a circular, semicircular, oval or polygonal cross-sectional shape.
- Fig. 4 is a plan view of the second support member 40 of an embodiment shown.
- the second elevations 8 'and the perforations 4' and 4 "are shown, and the perforations 4" are larger than the perforations 4 '.
- the elevation 8 ' is surrounded by perforations 4'.
- the cross-sectional shape of the elevation 8 ' is circular.
- the web 26 is first transported on the belt 50 with the fleece base and is applied to the non-woven top side with the liquid 30 and pre-consolidated. Then, the nonwoven fabric 26 is placed on the first support member 12 with the nonwoven upper side, and the nonwoven lower surface is charged with the liquid 30.
- the fleece is transported to the second carrier element 40 and placed with the nonwoven underside on the support member 40 and applied to the nonwoven upper side with the liquid 30. In this way, the perforations are made by applying a liquid from both sides of the mat. In this way, more accurately shaped perforations can be made in the web.
- a method for producing a carrier element 12, 40 for a device 1, 3 for perforating a nonwoven fabric with hydrodynamic needling is shown.
- step I a sheet metal element 2 is produced.
- perforations 4, 4 ', 4 are introduced into the sheet metal element 2.
- the perforations 4, 4', 4" can all have the same size. However, different sizes may be provided.
- step III the elevations 8 and 8 'are introduced into the sheet metal element 2 by deep drawing.
- a thermoforming punch 6 is pressed into the sheet and the sheet 2 is stretched at this point.
- the process step III can also be carried out before or at the same time as process step II.
- the height of the elevation 8, 8' is preferably equal to the diameter of the elevations 8, 8 '.
- the sheet metal element 2 is provided with a coating 10.
- Fig. 5 It is shown that the coating 10 is applied to the entire sheet metal element 2. It can only partially, z. B. on the ridges 8, 8 'are applied.
- a sheet with a thickness between 1 and 2 mm It is preferably used a sheet with a thickness between 1 and 2 mm. Further, deep-drawing punches with a diameter of 3 to 10 mm are used. For example, with a punch of 3 mm diameter and a sheet of 1 mm thickness, protrusions having a diameter of 5 mm and a height of about 2.5 mm are produced.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Nonwoven Fabrics (AREA)
- Finger-Pressure Massage (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Perforieren eines Vlieses mittels hydrodynamischer Vernadelung nach dem Oberbegriff der Ansprüche 1 sowie ein Verfahren zum Perforieren eines Vlieses mittels hydrodynamischer Vernadelung nach Anspruch 10.The invention relates to a device for perforating a nonwoven by means of hydrodynamic needling according to the preamble of
Bisher bekannte Vorrichtungen zum Perforieren eines Vlieses mittels hydrodynamischer Vernadelung weisen mindestens ein erstes Trägerelement mit einer ersten Trägeroberfläche auf. Die erste Trägeroberfläche weist erste Erhöhungen und erste Perforationen als Drainageöffnung auf. Das zu bearbeitende Vlies ist auf der Trägeroberfläche platzierbar. Mittels einer aus Öffnungen eines Düsenbalkens austretendenden Flüssigkeit, werden Fasern des auf der Trägeroberfläche angeordneten Vlieses von den Erhöhungen heruntergespült, so dass Perforationen in dem Vlies entstehen. Bei den bisher bekannten Vorrichtungen und Verfahren besteht jedoch der Nachteil, dass insbesondere schwere Vliese mit einem Flächengewicht von über 70 g/m2 nur schlecht perforierbar sind.Previously known devices for perforating a nonwoven by means of hydrodynamic needling have at least a first carrier element with a first carrier surface. The first carrier surface has first elevations and first perforations as the drainage opening. The nonwoven to be processed can be placed on the carrier surface. By means of a liquid emerging from openings of a nozzle bar, fibers of the nonwoven fabric arranged on the carrier surface are washed down by the elevations, so that perforations are formed in the nonwoven fabric. In the previously known devices and methods, however, there is the disadvantage that in particular heavy nonwovens with a weight per unit area of more than 70 g / m 2 are only poorly perforable.
Schwere Vliese werden häufig als Geotextilien verwendet. Diese bestehen häufig aus einem hydrophoben Material, insbesondere aus Stapelfasern oder endlosen Filamenten aus PP oder PET. Um jedoch die schweren Vliese als Geotextilien zu verwenden, werden diese z.T. zusätzlich mit hydrophiler Avivage zur besseren Entwässerung von Oberflächenwasser ausgerüstet. Gemäß der vorliegenden Erfindung, sollen anstelle der hydrophilen Ausrüstung in solche schweren Vliese Drainageöffnungen eingebracht werden, wobei diese Drainageöffnungen mittels hydrodynamischer Vernadelung eingebracht werden sollen. Dies hat den Vorteil, dass dies ein einfacheres und kostengünstigeres Verfahren darstellt als die Ausrüstung mit den hydrophilen Avivage.Heavy nonwovens are often used as geotextiles. These often consist of a hydrophobic material, in particular staple fibers or endless Filaments made of PP or PET. However, in order to use the heavy nonwovens as geotextiles, some of them are additionally equipped with hydrophilic finishes for better drainage of surface water. According to the present invention, instead of the hydrophilic finish, drainage openings are to be introduced into such heavy nonwovens, wherein these drainage openings are to be introduced by means of hydrodynamic needling. This has the advantage that this is a simpler and less expensive process than the equipment with the hydrophilic finish.
Aufgabe der vorliegenden Erfindung ist es eine Vorrichtung und ein Verfahren zum Perforieren eines Vlieses zu schaffen sowie ein Verfahren zur Herstellung eines Trägerelementes für eine Vorrichtung zum Perforieren eines Vlieses zu schaffen, die es ermöglichen, schwere Vliese mit einem Flächengewicht von 70 g/m2 zu perforieren.The object of the present invention is to provide a device and a method for perforating a nonwoven fabric and to provide a method for producing a carrier element for a device for perforating a nonwoven, which makes it possible to heavy nonwovens with a basis weight of 70 g / m 2 perforate.
Zur Lösung dieser Aufgabe dienen die Merkmale der Ansprüche 1 und 10.To achieve this object, the features of
Bei dem bisherigen Stand der Technik werden die Trägerelemente meist aus rostfreiem Blech hergestellt. Dies hat jedoch den Nachteil, dass das Blech eine relative hohe Zähigkeit aufweist und die Erhöhung nur bestimmte Formen und Abmessungen aufweisen können. Ferner können die Erhöhung in ein rostfreies Blech nicht mittels Tiefziehen eingebracht werden. Bei einem solchen rostfreien Blech kann die Höhe der Erhöhungen nur weniger als_halb so groß sein wie der Durchmesser der Erhöhungen.In the prior art, the support elements are usually made of stainless sheet metal. However, this has the disadvantage that the sheet has a relatively high toughness and the increase can only have certain shapes and dimensions. Furthermore, the increase in a stainless sheet can not be introduced by deep drawing. With such a stainless sheet, the height of the ridges may be less than one-half the diameter of the ridges.
Bei der vorliegenden Erfindung besteht jedoch der Vorteil darin, dass das Blech zunächst tiefgezogen wird und somit Erhöhungen beliebiger Form und Höhe produzierbar sind. Die Haltbarkeit erhält das Trägerelement durch die Beschichtung.In the present invention, however, the advantage is that the sheet is first deep-drawn and thus increases of any shape and height can be produced. The durability of the carrier element is replaced by the coating.
Die Erhöhungen, die in das Blechelement eingebracht werden, können jeweils eine derartige Abmessung und Form aufweisen, dass ein schweres Vlies mit einem Flächengewicht von mindestens 70 bis 260 g/m2 bei der hydrodynamischen Vernadelung durch die Erhöhungen perforierbar ist, so dass in dem Vlies Perforationen mit einer Öffnungsweite von mindestens 4 mm entstehen.The ridges which are introduced into the sheet metal element, may each have such a size and shape that a heavy fabric with a basis weight of at least 70 to 260 g / m 2 can be perforated during the hydrodynamic needling of the ridges, so that in the non-woven Perforations with an opening width of at least 4 mm arise.
Die Erhöhungen des Trägerelementes können als Grundfläche eine polygonale, kreis-, halbkreis- oder ovalförmige Querschnittsform aufweisen. Auch die Perforationen können in der Vliesebene eine polygonale, kreis-, halbkreis- oder ovalförmige Querschnittsform aufweisen. Die Form der Perforationen im Vlies ist von der Form der Erhöhungen im Trägerelement abhängig. Die Form der Perforationen kann zusätzlich z.B. davon abhängig sein, ob sich das Vlies beim Abnehmen von dem Trägerelement z.B. in Transportrichtung dehnt. In diesem Fall entstehen ovale Perforationen in dem Vlies, obwohl die Erhöhungen des Trägerelementes kreisrunde Querschnittsformen aufweisen.The elevations of the carrier element can have a polygonal, circular, semicircular or oval-shaped cross-sectional shape as base area. The perforations may also have a polygonal, circular, semicircular or oval cross-sectional shape in the nonwoven plane. The shape of the perforations in the fleece depends on the shape of the elevations in the carrier element. The shape of the perforations may additionally be e.g. be dependent on whether the nonwoven upon removal from the support element, e.g. in the transport direction stretches. In this case, oval perforations are formed in the mat, although the elevations of the support element have circular cross-sectional shapes.
Die Öffnungsweite ist die breiteste Breite der jeweiligen Öffnung. Bei kreisrunden Perforationen ist die Öffnungsweite der Durchmesser. Ovale, d.h. vorzugsweise elliptische Perforationen haben jeweils einen größten und einen kleinsten Durchmesser. Die Öffnungsweite ist der größte Durchmesser des Ovals. Die kleinste Weite der ovalen Perforation ist der kleinste Durchmesser.The opening width is the widest width of the respective opening. For circular perforations, the opening width is the diameter. Oval, ie preferably elliptical perforations each have a maximum and a minimum diameter. The opening width is the largest diameter of the oval. The smallest width of the oval perforation is the smallest diameter.
Die Erfindung sieht in vorteilhafterweise vor, dass bei einer Vorrichtung zum Perforieren eines Vlieses mittels hydrodynamischer Vernadelungen ein zweites Trägerelement vorgesehen ist, das eine zweite Trägeroberfläche mit zweiten Erhöhungen und zweiten Perforationen als Drainageöffnung aufweist, wobei einerseits die Erhöhung des Trägerelements ein solchen Abstand zueinander aufweisen und andererseits das mit den Perforationen versehene Vlies derart auf dem zweiten Trägerelement platzierbar ist, das die Erhöhungen des zweiten Trägerelementes in die Perforationen des auf dem zweiten Trägerelement angeordneten Vlieses hineinragen, wobei mindestens ein zweiter Düsenbalken vorge sehen ist und wobei das Vlies mittels einer aus den Öffnungen des zweiten Düsenbalkens unter Hochdruck austretenden Flüssigkeit beaufschlagbar ist.The invention advantageously provides that in a device for perforating a nonwoven by means of hydrodynamic needling, a second carrier element is provided which has a second carrier surface with second elevations and second perforations as a drainage opening, wherein on the one hand the elevation of the carrier element have such a distance from one another and on the other hand, the fleece provided with the perforations can be placed on the second carrier element, which project the elevations of the second carrier element into the perforations of the fleece arranged on the second carrier element, wherein at least one second jet bar projects see and wherein the fleece can be acted upon by means of a liquid emerging from the openings of the second nozzle bar under high pressure.
Die Vorrichtung hat den Vorteil, dass insbesondere ein schweres Vlies mit einem Flächengewicht von mindestens 70 g/m2, vorzugsweise mindestens 100 g/m2, besonders gut perforiert werden kann. Dadurch, dass in einem zweiten Schritt das Vlies noch einmal auf einem zweiten Trägerelement perforiert wird, wobei die Erhöhungen des zweiten Trägerelementes in die bereits bestehenden Perforationen hineinragen, können besonders gut ausgebildete und genau definierte Perforationen in dem Vlies gebildet werden. Auf diese Weise können auch besonders schwere Vliese bis 260 g/m2 perforiert werden.The device has the advantage that in particular a heavy fleece with a weight per unit area of at least 70 g / m 2 , preferably at least 100 g / m 2 , can be perforated particularly well. Characterized in that in a second step, the nonwoven is perforated again on a second carrier element, wherein the elevations of the second carrier element protrude into the already existing perforations, particularly well-trained and well-defined perforations can be formed in the web. In this way, even very heavy nonwovens up to 260 g / m 2 can be perforated.
Das Vlies auf dem ersten Trägerelement kann mit einer Vliesoberseite auf dem ersten Trägerelement platzierbar sein und das Vlies ist auf einer Vliesunterseite mittels der aus den Öffnungen des ersten Düsenbalgens austretenden Flüssigkeit beaufschlagbar. Das Vlies kann mit der Vliesunterseite auf dem zweiten Trägerelement platzierbar sein und das Vlies kann mit der Vliesoberseite mittels der aus den Öffnungen des zweiten Düsenbalkens austretenden Flüssigkeit beaufschlagbar sein.The nonwoven on the first carrier element can be placed on the first carrier element with a nonwoven upper side, and the nonwoven can be acted upon on a nonwoven underside by means of the liquid emerging from the openings of the first nozzle bellows. The nonwoven fabric can be placed on the second support element with the nonwoven underside and the nonwoven fabric can be acted upon by the nonwoven upper side by means of the liquid emerging from the openings of the second nozzle beam.
Dies hat den Vorteil, dass die Perforationen in dem Vlies besonders gut ausgebildet werden, da das Vlies von beiden Seiten hydrodynamisch vernadelt wird. Ferner ist auch die Festigkeit des Vlieses durch das zweimalige Beaufschlagen mit der Flüssigkeit erhöht.This has the advantage that the perforations are particularly well formed in the nonwoven, since the nonwoven is hydrodynamically needled from both sides. Furthermore, the strength of the web is increased by the two-time application of the liquid.
Die Form und die Abmessung der jeweiligen Erhöhungen des zweiten Trägerelementes können derart gewählt sein, dass die Erhöhungen des zweiten Trägerelementes in die Perforationen des auf dem zweiten Trägerelement platzierbaren Vlieses hineinragen können. Die Erhöhungen weisen vorzugsweise eine Höhe von mindestens 3,5 mm auf. Die Erhöhungen des zweiten Trägerelementes müssen eine bestimmte Höhe aufweisen, damit beim Platzieren des Vlieses auf dem zweiten Trägerelement die Erhöhungen des zweiten Trägerelementes in die bereits bestehende Perforation des Vlieses hineinragen können. Auf diese Weise wird das Vlies noch einmal auf dem zweiten Trägerelement an den gleichen Stellen perforiert und die Perforationen können stärker ausgebildet werden. Wenn die Erhöhungen des zweiten Trägerelementes nicht genau in die bereits bestehenden Perforationen des Vlieses hineinragen würden, so würden weitere Perforationen in dem Vlies entstehen und die bestehenden Perforationen wären keine klar definierten Perforationen.The shape and the dimension of the respective elevations of the second carrier element can be selected such that the elevations of the second carrier element can protrude into the perforations of the nonwoven which can be placed on the second carrier element. The elevations preferably have a height of at least 3.5 mm. The elevations of the second carrier element must have a certain height, so that when placing the fleece on the second carrier element, the elevations of the second carrier element can protrude into the already existing perforation of the fleece. In this way, the web is again perforated on the second support member at the same locations and the perforations can be made stronger. If the raises of the second carrier element would not protrude exactly into the already existing perforations of the web, so further perforations would be formed in the web and the existing perforations would not be clearly defined perforations.
Die Abmessung und die Form der Erhöhungen des ersten und des zweiten Trägerelementes können derart gewählt sein, dass schwere Vliese mit einem Flächengewicht von mindestens 70 g/m2 bei der hydrodynamischen Vernadelung durch die Erhöhungen perforierbar sind, so dass in dem Vlies Perforierungen mit einer Öffnungsweite von mindestens 4 mm, vorzugsweise mindestens 5 mm entstehen. Das erste und das zweite Trägerelement können jeweils aus einem Blechelement und einer Beschichtung bestehen und die Erhöhungen in dem jeweiligen Blechelement können mittels Tiefziehen eingebracht sein. Die jeweiligen Blechelemente können mittels der Beschichtung beschichtet sein.The dimension and the shape of the elevations of the first and the second support member can so be chosen that heavy nonwovens are perforatable in the hydrodynamic needle punching by the elevations having a basis weight of 70 g / m 2, so that in the non-woven perforations having an opening of at least 4 mm, preferably at least 5 mm. The first and the second carrier element can each consist of a sheet metal element and a coating and the elevations in the respective sheet metal element can be introduced by means of deep drawing. The respective sheet metal elements may be coated by means of the coating.
Es kann ferner in vorteilhafterweise vorgesehen sein, dass die Abmessungen und die Form der Erhöhung des ersten Trägerelementes derart gewählt sind, dass ein schweres Vlies mit einem Flächengewicht von mindestens 70 g/m2 bei einer hydrodynamischen Vernadelung durch die Erhöhung perforierbar ist, so dass in dem Vlies Perforierungen mit einer Öffnungsweite von mindestens 4 mm, vorzugsweise von mindestens 5 mm entstehen, wobei das erste Trägerelement aus einem Blechelement und einer Beschichtung besteht und die Erhöhungen in das Blechelement mittels Tiefziehen einbringbar sind und mittels der Beschichtungen beschichtet sind.It can also be advantageously provided that the dimensions and the shape of the increase of the first support element are chosen such that a heavy nonwoven with a basis weight of at least 70 g / m 2 is perforated in a hydrodynamic needling through the increase, so that in the nonwoven perforations having an opening width of at least 4 mm, preferably of at least 5 mm, wherein the first carrier element consists of a sheet metal element and a coating and the elevations in the sheet metal element by means of deep drawing can be introduced and coated by the coatings.
Die Abmessungen und die Form der Erhöhungen des ersten Trägerelementes können derart gewählt sein, dass ein schweres Vlies mit einem Flächengewicht von mindestens 70 g/m2 bei der hydrodynamischen Vernadelung durch die Erhöhungen perforierbar ist, so dass in dem Vlies Perforierungen mit einer kleinsten Weite von mindestens 3 mm entstehen. Die kleinste Weite einer Perforation ist die kleinste Breite der Perforation. Bei einer ovalen, vorzugsweise elliptischen Perforation ist die kleinste Weite der Perforation der kleinste Durchmesser.The dimensions and the shape of the elevations of the first support member can so be chosen such that a heavy fabric with a surface weight of 70 g / m 2 can be perforated during the hydrodynamic needling of the ridges, so that in the non-woven perforations having a smallest width of at least 3 mm. The smallest width of a perforation is the smallest width of the perforation. For an oval, preferably elliptical perforation, the smallest width of the perforation is the smallest diameter.
Das jeweilige Blechelement kann aus einem Material bestehen, das eine solche Zähigkeit aufweist, dass die Erhöhungen mittels Tiefziehen herstellbar sind.The respective sheet metal element may consist of a material having such a toughness that the elevations can be produced by deep drawing.
Die jeweilige Beschichtung kann aus einem Material bestehen, dass eine höhere Zähigkeit aufweist als das Material des jeweiligen Blechelementes.The respective coating may consist of a material that has a higher toughness than the material of the respective sheet metal element.
Die jeweilige Beschichtung kann aus einem Metall, vorzugsweise aus Nickel, bestehen.The respective coating may consist of a metal, preferably of nickel.
Die Erhöhungen des ersten und/oder zweiten Trägerelementes können einen Durchmesser von mindestens 4 mm, vorzugsweise mindestens 5 mm, aufweisen und die Form der Erhöhungen können derart gewählt sein, dass ein schweres Vlies mit einem Flächengewicht von mindestens 70 g/m2, vorzugweise mit einem Flächengewicht von 100 g/m2 bis 260 g/m2, perforierbar ist.The elevations of the first and / or second carrier element may have a diameter of at least 4 mm, preferably at least 5 mm, and the shape of the elevations may be selected such that a heavy nonwoven having a basis weight of at least 70 g / m 2 , preferably with a basis weight of 100 g / m 2 to 260 g / m 2 , perforable.
Die Höhe der Erhöhungen des ersten und/oder zweiten Trägerelementes kann mindestens dem halben Durchmesser der Erhöhungen des ersten und/oder zweiten Trägerelementes entsprechen.The height of the elevations of the first and / or second carrier element may correspond to at least half the diameter of the elevations of the first and / or second carrier element.
Die Erhöhung des ersten und/oder zweiten Trägerelementes kann einen Durchmesser zwischen 5 und 13 mm aufweisen. Die Erhöhungen des ersten und/oder zweiten Trägerelementes können die Form von Dornen aufweisen.The increase of the first and / or second support element may have a diameter between 5 and 13 mm. The elevations of the first and / or second carrier element may have the form of thorns.
Die Erhöhungen des ersten und/oder zweiten Trägerelementes können konisch zulaufend oder kegelstumpfförmig ausgebildet sein.The elevations of the first and / or second carrier element may be tapered or frusto-conical.
Die Erhöhungen des ersten und/oder zweiten Trägerelementes können als Grundfläche eine kreis-, halbkreis-, oval-, oder polygonale Querschnittsform aufweisen.The elevations of the first and / or second carrier element may have a circular, semi-circular, oval, or polygonal cross-sectional shape as base area.
Das erste und/oder zweite Trägerelement kann jeweils ein Trommelmantel einer Trommel sein und die jeweilige Trommeloberfläche die Oberfläche des jeweiligen Trommelmantels sein. Das erste und/oder zweite Trägerelement kann ein endlos umlaufendes Band sein. Das Band kann ein flexibles Metallband sein.The first and / or second carrier element may each be a drum shell of a drum and the respective drum surface may be the surface of the respective drum shell. The first and / or second carrier element may be an endlessly circulating belt. The band can be a flexible metal band.
Gemäß der vorliegenden Erfindung sind bei einem Verfahren zum Perforieren eines schweren Vlieses in vorteilhafterweise folgende Verfahrensschritte vorgesehen:
- Auflegen eines Vlieses mit einem Flächengewicht von mindestens 70 g/m2 auf eine erste Trägeroberfläche eines ersten Trägerelementes, wobei die erste Trägeroberfläche erste Erhöhungen und erste Perforationen als Drainageöffnung aufweist,
- Erzeugen von Perforationen in dem Vlies durch ein erstes Beaufschlagen des auf der ersten Trägeroberfläche platzierten Vlieses mit einer unter Hochdruck stehenden Flüssigkeit, wobei zumindest ein Teil der Fasern des Vlieses, die beim Beaufschlagen mit der Flüssigkeit auf den Erhöhungen platziert sind, durch die Flüssigkeit von den Erhöhungen heruntergespült werden und dadurch Perforationen in den Vlies entstehen,
- Auflegen des mit Perforationen versehenen Vlieses auf eine zweite Trägeroberfläche eines zweiten Trägerelementes, wobei die zweite Trägeroberfläche zweite Erhöhungen und zweite Perforationen als Drainageöffnung aufweist, wobei einerseits die zweiten Erhöhungen derart voneinander beabstandet sind und das mit Perforationen versehene Vlies derart auf der zweiten Trägeroberfläche platziert wird, dass die Erhöhungen in die Perforationen des Vlieses hineinragen, und
- Zweites Beaufschlagen des auf der zweiten Trägeroberfläche patzierten Vlieses mit einer unter Hochdruck stehenden Flüssigkeit.
- Laying a nonwoven having a basis weight of at least 70 g / m 2 on a first carrier surface of a first carrier element, wherein the first carrier surface has first elevations and first perforations as a drainage opening,
- Producing perforations in the web by first pressurizing the web placed on the first substrate surface with a high pressure liquid, wherein at least a portion of the fibers of the web placed on the ridges upon application of the liquid through the liquid from the web Raisings are flushed down and thereby create perforations in the fleece,
- Laying the perforated nonwoven fabric on a second carrier surface of a second carrier element, the second carrier surface having second elevations and second perforations as a drainage opening, wherein on the one hand the second elevations are spaced apart and the perforated nonwoven fabric is placed on the second carrier surface, that the elevations protrude into the perforations of the fleece, and
- Second loading of the nonwoven padded on the second carrier surface with a liquid under high pressure.
Dieses Verfahren hat den Vorteil, dass auch schwere Vliese gut perforiert werden können, wobei die Perforationen klar definiert sind.This method has the advantage that even heavy nonwovens can be well perforated, with the perforations being clearly defined.
Beim zweiten Beaufschlagen mit Flüssigkeit kann der Teil der Fasern des Vlieses, die beim ersten Beaufschlagen mit Flüssigkeit nicht von den ersten Erhöhungen des ersten Trägerelementes gespült worden sind, von den zweiten Erhöhungen des zweiten Trägerelementes beim zweiten Beaufschlagen mit Flüssigkeit gespült werden. Dies hat den Vorteil, dass besonders klar definierte Perforationen in einem schweren Vlies möglich sind.In the second fluid application, the portion of the nonwoven fibers which have not been rinsed by the first ridges of the first support member upon first application of liquid may be rinsed by the second ridges of the second support member upon second fluid application. This has the advantage that particularly clearly defined perforations in a heavy fleece are possible.
Das mit einer Vliesoberseite auf den ersten Trägerelement angeordnete Vlies kann von einer Vliesunterseite mit Flüssigkeit beaufschlagt werden und das mit Perforationen versehene und auf den zweiten Trägerelement angeordnete Vlies kann von einer Vliesoberseite mit Flüssigkeit beaufschlagt werden. Auf dem zweiten Trägerelement ist das Vlies mit der Vliesunterseite auf dem Trägerelement angeordnet. Dies hat den Vorteil, dass das Vlies im zweiten Schritt auf der Vliesoberseite mit Flüssigkeit beaufschlagt wird, was dazu führt, dass die Perforationen insbesondere von der Vliesoberseite her klar definiert sind und die Perforationen im Vlies faserfrei sind. Dies hat den Vorteil, dass die Entwässerung von Oberflächenwasser, wie beispielsweise Regen, verbessert werden kann.The fleece arranged with a fleece top side on the first carrier element can be supplied with liquid from a fleece underside and the fleece provided with perforations and arranged on the second carrier element can be supplied with liquid from a fleece top side. On the second carrier element, the fleece with the fleece underside is arranged on the carrier element. This has the advantage that liquid is applied to the nonwoven in the second step on the upper side of the nonwoven, with the result that the perforations are clearly defined, in particular from the upper side of the nonwoven, and the perforations in the nonwoven are fiber-free. This has the advantage that the drainage of surface water, such as rain, can be improved.
Es können Perforationen mit einer Öffnungsweite von mindestens 5 mm in dem Vlies erzeugt werden, wobei die Perforationen mit einer Öffnungsweite von mindestens 4 mm, vorzugsweise mindestens 5 mm, dadurch erzeugt werden, dass die Abmessungen und die Form der Erhöhungen derart gewählt sind, dass die Fasern des Vlieses, die beim Beaufschlagen mit Flüssigkeit auf den Erhöhungen platziert sind, durch die Flüssigkeit von den Erhöhungen gespült werden.Perforations with an opening width of at least 5 mm can be produced in the fleece, the perforations having an opening width of at least 4 mm, preferably at least 5 mm, being produced in such a way that the dimensions and the shape of the elevations are chosen such that the Fibers of the nonwoven placed on the ridges upon application of liquid to flush liquid from the ridges.
Mit dem Verfahren der vorliegenden Erfindung kann ein Geotextil hergestellt werden.A geotextile can be made by the process of the present invention.
Das gemäß der vorliegenden Erfindung hergestellte Vlies besteht aus Stapelfasern aus PP, PET, PA oder anderen Polymeren oder aus endlosen Filamenten (Spinnvlies) aus PP oder PET oder anderen Polymeren.The nonwoven produced according to the present invention consists of staple fibers of PP, PET, PA or other polymers or of endless filaments (spunbonded nonwoven) of PP or PET or other polymers.
Bei einem Verfahren zum Herstellen eines Trägerelementes für eine Vorrichtung zum Perforieren eines Vlieses mittels hydrodynamischer Vernadelung folgende Schritte vorgesehen sind:
- Herstellen eines Blechelementes,
- Einbringen von Perforationen in das Blechelement,
- Einbringen von Erhöhungen in das Blechelement mittels Tiefziehen, und
- Beschichten des mit Perforationen und Erhöhungen versehenen Blechelementes.
- Producing a sheet metal element,
- Introducing perforations into the sheet metal element,
- Introduction of elevations in the sheet metal element by means of deep drawing, and
- Coating the sheet metal element provided with perforations and elevations.
Dies hat den Vorteil, dass die Erhöhungen in das Blechelement mittels Tiefziehen eingebracht werden. Dadurch können in das Blechelement Erhöhungen eingebracht werden, die eine solche Höhe aufweisen, dass mittels dieser Erhöhungen auch Perforationen in ein schweres Vlies eingebracht werden können. Ferner hat die Beschichtung den Vorteil, dass das die Beschichtung aufweisende Trägerelement eine längere Haltbarkeit besitzt.This has the advantage that the elevations are introduced into the sheet metal element by means of deep drawing. As a result, elevations can be introduced into the sheet-metal element which have a height such that perforations can also be introduced into a heavy fleece by means of these elevations. Furthermore, the coating has the advantage that the carrier element having the coating has a longer shelf life.
Bei dem bisherigen Stand der Technik werden die Trägerelemente meist aus rostfreiem Blech hergestellt. Dies hat jedoch den Nachteil, dass das Blech eine relative hohe Zähigkeit aufweist und die Erhöhung nur bestimmte Formen und Abmessungen aufweisen können. Ferner können die Erhöhung in ein rostfreies Blech nicht mittels Tiefziehen eingebracht werden. Bei einem solchen rostfreien Blech kann die Höhe der Erhöhungen nur weniger als_halb so groß sein wie der Durchmesser der Erhöhungen.In the prior art, the support elements are usually made of stainless sheet metal. However, this has the disadvantage that the sheet has a relatively high toughness and the increase can only have certain shapes and dimensions. Furthermore, the increase in a stainless sheet can not be introduced by deep drawing. With such a stainless sheet, the height of the ridges may be less than one-half the diameter of the ridges.
Dadurch, dass das Blech zunächst tiefgezogen wird, können Erhöhungen beliebiger Form und Höhe produzierbar sind. Die Haltbarkeit erhält das Trägerelement durch die Beschichtung.Because the sheet is first deep-drawn, increases of any shape and height can be produced. The durability of the carrier element is replaced by the coating.
Die Erhöhungen, die in das Blechelement eingebracht werden, können jeweils eine derartige Abmessung und Form aufweisen, dass ein schweres Vlies mit einem Flächengewicht von mindestens 70 bis 260 g/m2 bei der hydrodynamischen Vernadelung durch die Erhöhungen perforierbar ist, so dass in dem Vlies Perforationen mit einer Öffnungsweite von mindestens 4 mm entstehen.The ridges which are introduced into the sheet metal element may each have a dimension and shape such that a heavy nonwoven having a basis weight of at least 70 to 260 g / m 2 is perforable in the hydrodynamic needling by the ridges, so that in the web Perforations with an opening width of at least 4 mm arise.
Die Erhöhungen des Trägerelementes können als Grundfläche eine polygonale, kreis-, halbkreis- oder ovalförmige Querschnittsform aufweisen. Auch die Perforationen können in der Vliesebene eine polygonale, kreis-, halbkreis- oder ovalförmige Querschnittsform aufweisen. Die Form der Perforationen im Vlies ist von der Form der Erhöhungen im Trägerelement abhängig. Die Form der Perforationen kann zusätzlich z.B. davon abhängig sein, ob sich das Vlies beim Abnehmen von dem Trägerelement z.B. in Transportrichtung dehnt. In diesem Fall entstehen ovale Perforationen in dem Vlies, obwohl die Erhöhungen des Trägerelementes kreisrunde Querschnittsformen aufweisen.The elevations of the carrier element can have a polygonal, circular, semicircular or oval-shaped cross-sectional shape as base area. The perforations may also have a polygonal, circular, semicircular or oval cross-sectional shape in the nonwoven plane. The shape of the perforations in the fleece depends on the shape of the elevations in the carrier element. The shape of the perforations may additionally be dependent, for example, on whether the nonwoven stretches, for example, in the transport direction when removed from the carrier element. In this case oval perforations occur in the web, although the elevations of the carrier element have circular cross-sectional shapes.
Die Öffnungsweite ist die breiteste Breite der jeweiligen Öffnung. Bei kreisrunden Perforationen ist die Öffnungsweite der Durchmesser. Ovale, d.h. vorzugsweise elliptische Perforationen haben jeweils einen größten und einen kleinsten Durchmesser. Die Öffnungsweite ist der größte Durchmesser des Ovals. Die kleinste Weite der ovalen Perforation ist der kleinste Durchmesser.The opening width is the widest width of the respective opening. For circular perforations, the opening width is the diameter. Ovals, i. preferably elliptical perforations each have a largest and a smallest diameter. The opening width is the largest diameter of the oval. The smallest width of the oval perforation is the smallest diameter.
Die Erhöhungen, die in das Blechelement eingebracht werden, können jeweils eine derartige Abmessung und Form aufweisen, dass ein schweres Vlies mit einem Flächengewicht von mindestens 70 bis 260 g/m2 bei der hydrodynamischen Vernadelung durch die Erhöhungen perforierbar ist, so dass in dem Vlies Perforationen entstehen, deren kleinste Weite mindestens 3 mm aufweist.The ridges which are introduced into the sheet metal element may each have a dimension and shape such that a heavy nonwoven having a basis weight of at least 70 to 260 g / m 2 is perforable in the hydrodynamic needling by the ridges, so that in the web Perforations arise whose smallest width has at least 3 mm.
Das Blechelement kann aus einem Material bestehen, dass eine solche Zähigkeit aufweist, dass die Erhöhungen in das Blechelement mittels Tiefziehen einbringbar sind, wobei das Material vorzugsweise ein Metall ist.The sheet metal element may consist of a material having such a toughness that the elevations in the sheet metal element by means of deep drawing can be introduced, wherein the material is preferably a metal.
Dadurch, dass das Blechelement eine Zähigkeit aufweist, bei der die Erhöhungen mittels Tiefziehen in das Blechelement einbringbar sind, können die Erhöhungen mit einem einfachen und kostengünstigen Verfahren in das Trägerelement eingebracht werden.Characterized in that the sheet metal element has a toughness, in which the elevations are introduced by deep drawing in the sheet metal element, the elevations can be introduced with a simple and inexpensive process in the support element.
Das Blechelement kann mit einem Material beschichtet werden, das eine höhere Zähigkeit aufweist als das Material des Blechelements. Dies hat den Vorteil, dass das Trägerelement eine wesentlich längere Haltbarkeit besitzt.The sheet metal element may be coated with a material having a higher toughness than the material of the sheet metal element. This has the advantage that the carrier element has a much longer durability.
Das Blechelement kann mit einem Metall, vorzugsweise Nickel, beschichtet werden.The sheet metal element can be coated with a metal, preferably nickel.
Das Blechelement besteht vorzugsweise nicht aus Nickel. Nickel besitzt eine zu hohe Festigkeit, so dass die Erhöhungen nicht mittels Tiefziehen in das Blechelement eingebracht werden können, wenn das Blechelement aus Nickel besteht. Im Folgenden werden nun anhand der Zeichnungen Ausführungsbeispiele der Erfindung näher erläutert.The sheet metal element is preferably not made of nickel. Nickel has a too high strength, so that the elevations can not be introduced by deep drawing in the sheet metal element when the sheet metal element consists of nickel. In the following, embodiments of the invention will now be explained in more detail with reference to the drawings.
Es zeigen schematisch
- Fig. 1
- eine Vorrichtung zum Perforieren eines Vlieses mit hydrodynamischer Vernadelung,
- Fig. 2
- ein Ausschnitt aus
Fig. 1 , - Fig. 2a
- ein Ausschnitt eines weiteren Ausführungsbeispiels,
- Fig. 2b
- ein Ausschnitt eines weiteren Ausführungsbeispiels,
- Fig. 3
- eine Vorrichtung zum Perforieren eines Vlieses mit einem zweiten Trägerelement,
- Fig. 4
- eine Draufsicht auf ein Trägerelement,
- Fig. 5
- Verfahrensschritte eines Verfahrens zum Herstellen eines Trägerelementes für eine Vorrichtung zum Perforieren eines Vlieses.
- Fig. 1
- a device for perforating a fleece with hydrodynamic needling,
- Fig. 2
- a section from
Fig. 1 . - Fig. 2a
- a detail of a further embodiment,
- Fig. 2b
- a detail of a further embodiment,
- Fig. 3
- a device for perforating a nonwoven with a second carrier element,
- Fig. 4
- a top view of a support element,
- Fig. 5
- Method steps of a method for producing a carrier element for a device for perforating a nonwoven.
Das in
Das erste Trägerelement kann als selbsttragende Trommel ausgeführt werden. Alternativ kann die Trommel eine Basistrommel 16 aufweisen, auf der das erste Trägerelement 12 als äußere Schicht aufgebracht ist . Dies ist in
Als weitere Alternative kann vorgesehen sein, dass die Trommel eine Basistrommel 16 aufweist auf der ein Stützgewebe 17 angeordnet ist und wobei auf diesem Stützgewebe das erste Trägerelement 12 angeordnet ist. Dies ist in
Die Vorrichtung 1 weist ferner einen ersten Düsenbalken 24 auf. Es können auch weitere Düsenbalken 24' vorgesehen sein. Der erste Düsenbalken 24 weist Öffnungen auf. Aus den Öffnungen wird eine Flüssigkeit, vorzugsweise Wasser, mit Hochdruck ausgegeben. Diese Flüssigkeit 30 tritt als Flüssigkeitsstrahl auf das auf dem Trägerelement 12 angeordnete Vlies 26.The
Durch den hohen Druck der Flüssigkeit werden die Fasern des Vlieses 26, die sich auf den Erhöhungen 8 befinden, von den Erhöhungen 8 heruntergespült. Auf diese Weise entstehen Perforationen in dem Vlies. Die Flüssigkeit 30 tritt dann durch das Vlies und die als Drainageöffnung verwendete Perforationen 4 des ersten Trägerelementes 12 in das Trommelinnere. Dort wird die Flüssigkeit abgeführt und kann dem Düsenbalken 24 erneut zugeführt werden.Due to the high pressure of the liquid, the fibers of the
In
Die Abmessung und die Form der Erhöhungen 8 des ersten Trägerelementes 12 sind vorzugsweise derart gewählt, dass ein schweres Vlies mit einem Flächengewicht von mindestens 70 g/m2 bei der hydrodynamischen Vernadelung durch die Erhöhungen 8 perforierbar ist, so dass in dem Vlies Perforierungen 29 mit einer Öffnungsweite von mindestens 5 mm entstehen. Das erste Trägerelement 12 besteht vorzugsweise aus einem Blechelement und einer Beschichtung und die Erhöhungen sind mittels Tiefziehen in das Blechelement einbringbar und mittels der Beschichtung beschichtet. Dies wird eingehender in Bezug zu
Bei einem weiteren Ausführungsbeispiel ist in
Die Vorrichtung gemäß
Die Erhöhungen 8' des zweiten Trägerelements weisen vorzugsweise auch dieselbe Form auf wie die Erhöhungen des ersten Trägerelementes 12. Entscheidend ist jedoch der Abstand zwischen den Erhöhungen 8'. Dieser ist vorzugsweise derselbe ist wie der Abstand zwischen den Erhöhungen 8 des ersten Trägerelementes 12. Es existieren jedoch auch Vliese, die sich bei dem Ablösen von dem ersten Trägerelement um 0,5 bis 5 % in Transportrichtung dehnen. Bei diesen Vliesen ist vorgesehen, dass der Abstand in Umfangsrichtung zwischen den zweiten Erhöhungen des zweiten Trägerelements entsprechend um 0,5 bis 5 % größer ist als der Abstand in Umfangsrichtung der ersten Erhöhungen des ersten Trägerelements. Der Abstand in achsparalleler Richtung zwischen den zweiten Erhöhung ist der gleich groß wie der Abstand in achsparalleler Richtung zwischen den ersten Erhöhungen.The elevations 8 'of the second carrier element preferably also have the same shape as the elevations of the
Das mit Perforationen versehene Vlies 28 kann von dem ersten Trägerelement 12 zu dem zweiten Trägerelement 40 transportiert werden und derart auf dem als Trommel ausgebildete Trägerelement 40 angeordnet werden, dass die Erhöhungen 8' des zweiten Trägerelementes 40 in die Perforationen 29 des Vliese 28 hineinragen. Das zweite Trägerelement 40 ist als Trommel 44 ausgebildet und dreht sich in Drehrichtung 46 und transportiert das mit Perforationen versehene Vlies 28 in Transportrichtung 22.The perforated nonwoven 28 can be transported from the
Ferner sind zwei zweite Düsenbalken 36, 36' vorgesehen, aus denen eine unter Hochdruck stehende Flüssigkeit 30 aus den Öffnungen austritt und auf das bereits mit Perforationen versehene Vlies 28 trifft.Furthermore, two second nozzle bars 36, 36 'are provided, from which a high-
Auf diese Weise werden der Teil der Fasern des Vlieses 28, der beim Beaufschlagen mit Flüssigkeit 30 auf dem ersten Trägerelement 12 nicht von den Erhöhungen 8 gespült worden sind, beim Beaufschlagen mit der Flüssigkeit 30 auf dem zweiten Trägerelement 40 von den zweiten Erhöhungen 8 des zweiten Trägerelementes 40 gespült. Ferner können die Erhöhungen 8' eine größere Abmessung aufweisen und es können beim zweiten Beaufschlag mit der Flüssigkeit bei dem zweiten Trägerelement 40 größere Perforationen im Vlies hergestellt werden als beim ersten Beaufschlagen mit der Flüssigkeit. Große Perforationen in dem Vlies können nur dadurch realisiert werden, dass das Vlies sowohl auf dem ersten als auch auf dem zweiten Trägerelement perforiert werden, wobei der Durchmesser der zweiten Erhöhungen größer gewählt wird als der Durchmesser der ersten Erhöhungen.In this way, the portion of the fibers of the nonwoven 28 which have not been flushed by the
Ferner wird das Vlies 26 bevor es zu dem ersten Trägerelement 12 transportiert wird mittels aus Düsenbalken austretender Flüssigkeit 30 vorverfestigt.Further, the
Die Form und die Abmessung der Erhöhungen 8' des zweiten Trägerelementes 40 können derart gewählt sein, dass die Erhöhungen 8' des zweiten Trägerelementes 40 in die Perforationen 29 des auf dem zweiten Trägerelement 40 platzierten Vlieses 28 hineinragbar sind, wobei die Erhöhungen 8' vorzugsweise eine Höhe aufweisen, die etwa dem halben Durchmesser der Erhöhung entspricht, bei einem Durchmesser von 7 mm wird z.B. eine Höhe von 3,5 mm gewählt.The shape and the dimension of the elevations 8 'of the second carrier element 40 may be selected such that the elevations 8' of the second carrier element 40 are hineinragbar in the
Die Erhöhungen des ersten und/oder zweiten Trägerelementes 12, 40 können eine Breite bzw. einen Durchmesser von 5 bis 15 mm aufweisen. Die Erhöhungen 8, 8' des ersten und des zweiten Trägerelementes 12, 40 können die Form von Dornen aufweisen. Ferner können sie konisch zulaufend oder kegelstumpfförmig ausgebildet sein. Die Grundfläche der Erhöhungen 8 bzw. 8' kann eine kreis-, halbkreis-, oval- oder polygonale Querschnittsform aufweisen. In
Ferner ist in der
In der
Zunächst wird im Verfahrensschritt I ein Blechelement 2 hergestellt. In dem darauffolgenden Verfahrensschritt II werden Perforationen 4, 4', 4" in das Blechelement 2 eingebracht. Die Perforationen 4, 4', 4" können alle dieselbe Größe auf. Es können jedoch auch unterschiedliche Größen vorgesehen werden.First, in step I, a
In dem Verfahrensschritt III werden die Erhöhungen 8 bzw. 8' in das Blechelement 2 mittels Tiefziehen eingebracht. Dabei wird ein Tiefziehstempel 6 in das Blech gedrückt und das Blech 2 wird an dieser Stelle verstreckt. Auf diese Weise werden die Erhöhungen 8 bzw. 8' hergestellt. Der Verfahrensschritt III kann auch vor oder auch gleichzeitig mit dem Verfahrensschritt II ausgeführt werden. Die Durchmesser der Erhöhungen 8, 8' sind gleich dem Tiefziehstempeldurchmesser plus zweimal der Blechdicke des Blechelements 2. Die Höhe der Erhöhung 8, 8' ist vorzugsweise gleich dem Durchmesser der Erhöhungen 8, 8'.In step III, the
In einem letzten Schritt IV wird das Blechelement 2 mit einer Beschichtung 10 versehen. In
Es wird vorzugsweise ein Blech mit einer Dicke zwischen 1 und 2 mm verwendet. Ferner werden Tiefziehstempel mit einem Durchmesser von 3 bis 10 mm verwendet. Bei einem Stempel von 3 mm Durchmesser und einem Blech von 1 mm Dicke werden beispielsweise Erhöhungen mit einem Durchmesser von 5 mm und einer Höhe von etwa 2,5 mm hergestellt.It is preferably used a sheet with a thickness between 1 and 2 mm. Further, deep-drawing punches with a diameter of 3 to 10 mm are used. For example, with a punch of 3 mm diameter and a sheet of 1 mm thickness, protrusions having a diameter of 5 mm and a height of about 2.5 mm are produced.
Claims (14)
- A device (1, 3) for perforating a non-woven fabric (26, 28, 34) by means of hydrodynamic needling, comprising- a first carrier element (12) having a first carrier surface (14), wherein the first carrier surface (14) has first elevations (8) and first perforations (4) as drainage openings, and wherein the non-woven fabric (26) for processing can be placed on the first carrier surface (14),- at least one first nozzle bar (24, 24') comprising openings, wherein fibers of the non-woven fabric (26) arranged on the first carrier surface (14) which are arranged on the first elevations of the first carrier surface (14) can be washed down from the elevations (8) by means of liquid (30) emerging under high pressure from the openings of the first nozzle bar (24, 24'), such that perforations (29) are created in the non-woven fabric (28),
characterized in that- a second carrier element (40) is provided, comprising a second carrier surface (42) having second elevations (8') and second perforations (4', 4") as drainage openings,- wherein, on the one hand, the elevations (8') of the second carrier element (40) have such a distance from each other and, on the other hand, the non-woven fabric (28) provided with the perforations (29) can be placed on the second carrier element (40) in such a manner that the elevations (8') of the second carrier element (40) protrude into the perforations (29) of the non-woven fabric (28) arranged on the second carrier element (40),- wherein at least one second nozzle bar (36, 36') is provided and wherein the non-woven fabric (28) can be subjected to a liquid (30) emerging under high pressure from the openings of the second nozzle bar (36, 36'). - The device (1, 3) according to claim 1, characterized in that the non-woven fabric (26) can be placed on the first carrier element (12) by a non-woven-fabric top side and that the non-woven fabric (26) on a non-woven-fabric bottom side can be subjected to the liquid emerging from the openings of the first nozzle bar (24, 24'), and wherein the non-woven fabric (28) can be placed on the second carrier element (40) by the non-woven-fabric bottom side and the non-woven fabric (28) on the non-woven-fabric top side can be subjected to the liquid emerging from the openings of the second nozzle bar (36, 36').
- The device (1, 3) according to claim 1 or 2, characterized in that the shape and the size of the respective elevations (8') of the second carrier element (40) are selected in such a manner that the elevations (8') of the second carrier element (40) protrude into the perforations (29) of the non-woven fabric (28) which is to be placed on the second carrier element (40), the elevations (8') preferably having a height corresponding to at least half the diameter of the elevations (8').
- The device (1, 3) according to any one of claims 1 to 3, characterized in that the sizes and the shape of the elevations (8, 8') of the first and the second carrier element (12, 40) are selected in such a manner that, in hydrodynamic needling, a heavy non-woven fabric (26, 28, 34) having a weight per unit area of at least 70 g/m2 can be perforated by the elevations (8, 8') such that perforations (29) are generated in the non-woven fabric (26, 28, 34) that have an opening width of at least 4 mm.
- The device (1, 3) according to any one of claims 1 to 4
characterized in that- the sizes and the shape of the elevations (8) of the first carrier element (12) are selected in such a manner that, in hydrodynamic needling, a heavy non-woven fabric (26, 28, 34) having a weight per unit area of at least 70 g/m2 can be perforated by the elevations (8) such that perforations (29) are generated in the non-woven fabric (28) that have an opening width of at least 4 mm,- the first carrier element (12) consists of a sheet-metal element (2) and a coating (10), and the elevations (8) can be formed in the sheet-metal element (2) by deep drawing and are coated by said coating (10). - The device (1, 3) according to any one of claims 1 to 5, characterized in that the respective sheet-metal element (2) is made of a material having such a toughness that the elevations (8, 8') can be formed by means of deep drawing.
- The device (1, 3) according to any one of claims 1 to 6, characterized in that the respective coating (10) consists of a material having a higher toughness than the material of the respective sheet-metal element (2).
- The device (1, 3) according to any one of claims 1 to 7, characterized in that the respective coating (10) consists of metal, preferably nickel.
- The device (1, 3) according to any one of claims 1 to 8, characterized in that the elevations (8, 8') of the first and/or the second carrier element (12, 40) have a diameter of at least 4 mm and the shapes of the elevations (8, 8') are selected in such a manner that a heavy non-woven fabric (26, 28, 34) having a weight per unit area of at least 70 g/m2, preferably a weight per unit area in the range from 100 g/m2 to 260 g/m2, can be perforated.
- A method for perforating a heavy non-woven fabric (26, 28, 34) having a weight per unit area of at least 70 g/m2, by- applying a non-woven fabric (26) having a weight per unit area of at least 70 g/m2 onto a first carrier surface (14) of a first carrier element (12), the first carrier surface (14) having first elevations (8) and first perforations (4) as drainage openings,- forming perforations in the non-woven fabric (28) by a first treatment of the non-woven fabric (26) placed on the first carrier surface (14) by means of highly pressurized liquid (30), wherein at least a part of the fibers of the non-woven fabric (26) which during the liquid (30) treatment are placed on the elevations, are washed down from the elevations (8) by means of said liquid (30) so that perforations (29) are generated in the non-woven fabric (28),- applying the non-woven fabric (28) provided with said perforations (29) onto a second carrier surface (42) of a second carrier element (40), the second carrier surface (14) having second elevations (8') and second perforations (4', 4") as drainage openings, wherein, on the one hand, the second elevations (8') have such a distance from each other and, on the other hand, the non-woven fabric (28) provided with the perforations (29) is positioned on the second carrier surface (42) in such a manner that the elevations (8') protrude into the perforations (29),- second treatment of the non-woven fabric (28) on the second carrier surface (42) by means of a highly pressurized liquid (30).
- The method according to claim 10, characterized in that, in the second treatment with liquid (30), the part of the fibers of the non-woven fabric (28) which in the first treatment with liquid (30) have not been washed off from the first elevations (8), are washed off from the second elevations (8').
- The method according to claim 10 or 11, characterized in that the non-woven fabric (26) arranged by a non-woven-fabric top side on the first carrier element (12) is subjected to liquid (30) from a non-woven-fabric bottom side and that the non-woven fabric (28) provided with perforations (29) and arranged on the second carrier element (40) is subjected to liquid (30) from a non-woven-fabric top side.
- The method according to any one of claims 10 to 12, characterized in that perforations (29) having an opening width of at least 4 mm are generated in the non-woven fabric (34), said perforations (29) having an opening width of at least 4 mm being generated in that the sizes and the shape of the elevations (8, 8') are selected to the effect that the fibers of the non-woven fabric (26, 28) which during the liquid (30) treatment are placed on the elevations, are washed down from the elevations (8, 8') by means of said liquid (30).
- The method according to any one of claims 10 to 13, characterized in that a geotextile is produced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL12759416T PL2758217T3 (en) | 2011-09-20 | 2012-09-11 | Method and device for perforating a non-woven fabric by means of hydrodynamic needling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011113672A DE102011113672A1 (en) | 2011-09-20 | 2011-09-20 | Method and device for perforating a nonwoven by hydrodynamic needling |
PCT/EP2012/067690 WO2013041403A2 (en) | 2011-09-20 | 2012-09-11 | Method and device for perforating a non-woven fabric by means of hydrodynamic needling |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2758217A2 EP2758217A2 (en) | 2014-07-30 |
EP2758217B1 true EP2758217B1 (en) | 2019-12-04 |
Family
ID=46851973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12759416.6A Active EP2758217B1 (en) | 2011-09-20 | 2012-09-11 | Method and device for perforating a non-woven fabric by means of hydrodynamic needling |
Country Status (8)
Country | Link |
---|---|
US (1) | US20140215780A1 (en) |
EP (1) | EP2758217B1 (en) |
CN (1) | CN103813890B (en) |
DE (1) | DE102011113672A1 (en) |
IL (1) | IL231559A0 (en) |
IN (1) | IN2014CN02057A (en) |
PL (1) | PL2758217T3 (en) |
WO (1) | WO2013041403A2 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3348916A1 (en) * | 2017-01-09 | 2018-07-18 | herotec GmbH Flächenheizung | Relocation device for a cooling or heating medium-carrying pipes of a area temperature control system |
JP6462758B2 (en) * | 2017-04-19 | 2019-01-30 | ユニ・チャーム株式会社 | Spunlace nonwoven fabric |
CN108374239B (en) * | 2018-02-06 | 2020-06-30 | 杭州萧山凤凰纺织有限公司 | Preparation method of composite jacquard spunlace nonwoven fabric |
DE202018107163U1 (en) * | 2018-12-14 | 2020-03-13 | Autefa Solutions Germany Gmbh | Jet suction box |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58132155A (en) * | 1982-01-31 | 1983-08-06 | ユニ・チヤ−ム株式会社 | Production of nonwoven fabric with pattern |
EP0215684B1 (en) * | 1985-09-20 | 1992-05-13 | Uni-Charm Corporation | Apparatus and process for producing apertured non-woven fabric |
EP0409535B1 (en) * | 1989-07-18 | 1994-03-23 | Mitsui Petrochemical Industries, Ltd. | A nonwoven fabric and a method of manufacturing the same |
CA2105026C (en) * | 1993-04-29 | 2003-12-16 | Henry Louis Griesbach Iii | Shaped nonwoven fabric and method for making the same |
US5441691A (en) * | 1993-09-30 | 1995-08-15 | The Procter & Gamble Company | Process for microaperaturing and microembossing a polymeric web |
FR2838457B1 (en) * | 2002-04-12 | 2004-08-27 | Rieter Perfojet | DRUM FOR INSTALLATION FOR PRODUCING A NON-WOVEN TABLECLOTH, METHOD FOR PRODUCING A NON-WOVEN TABLECLOTH, AND NON-WOVEN TABLECLOTH OBTAINED |
DE10232148B4 (en) * | 2002-07-16 | 2009-01-08 | Fiberweb Corovin Gmbh | Process for the liquid-permeable perforation of a fleece |
DE102004049146A1 (en) * | 2004-10-07 | 2006-04-13 | Fleissner Gmbh | Wasservernadelungsvorrichtung |
FR2877679B1 (en) * | 2004-11-10 | 2007-04-27 | Rieter Perfojet Sa | DRUM NATURALLY FOR A MACHINE FOR ENCHEVETREMENT OF A NONTISSE BY JETS OF WATER. |
DE102005036759A1 (en) * | 2005-02-28 | 2006-08-31 | Fleissner Gmbh | Device for patterning and strengthening nonwoven or knitted material by water jet treatment comprises a form with openings for patterning the material and punches for making holes in the material |
DE102006007834A1 (en) * | 2006-02-17 | 2007-09-06 | Fleissner Gmbh | Drum tray for creating structures and / or relief patterns on the surface of a woven or non-woven cell material or nonwoven |
DE102007023356A1 (en) * | 2007-05-18 | 2008-11-20 | Fleissner Gmbh | Device for water needling, structuring and / or perforation of nonwovens |
DE102007043543A1 (en) * | 2007-09-12 | 2009-03-19 | Fleissner Gmbh | Production of structured non-woven materials comprises passing unstructured non-woven web containing fusible fibers past hot gas jet, web resting on structured support which moves with it as it passes jet |
WO2009112008A1 (en) * | 2008-03-12 | 2009-09-17 | Fleissner Gmbh | Method and device for presolidifying a non-woven |
-
2011
- 2011-09-20 DE DE102011113672A patent/DE102011113672A1/en not_active Withdrawn
-
2012
- 2012-09-11 US US14/346,084 patent/US20140215780A1/en not_active Abandoned
- 2012-09-11 PL PL12759416T patent/PL2758217T3/en unknown
- 2012-09-11 WO PCT/EP2012/067690 patent/WO2013041403A2/en active Application Filing
- 2012-09-11 EP EP12759416.6A patent/EP2758217B1/en active Active
- 2012-09-11 CN CN201280045855.5A patent/CN103813890B/en active Active
- 2012-09-11 IN IN2057CHN2014 patent/IN2014CN02057A/en unknown
-
2014
- 2014-03-17 IL IL231559A patent/IL231559A0/en unknown
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP2758217A2 (en) | 2014-07-30 |
CN103813890A (en) | 2014-05-21 |
CN103813890B (en) | 2016-02-10 |
IN2014CN02057A (en) | 2015-05-29 |
WO2013041403A2 (en) | 2013-03-28 |
IL231559A0 (en) | 2014-04-30 |
WO2013041403A3 (en) | 2013-07-25 |
US20140215780A1 (en) | 2014-08-07 |
DE102011113672A1 (en) | 2013-03-21 |
PL2758217T3 (en) | 2020-06-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP1001064B1 (en) | Apparatus for making perforated nonwoven fabrics by means of hydrodynamic needling | |
DE69525498T3 (en) | Nonwovens with relief patterns | |
DE2114292C2 (en) | Apparatus for the production of patterned nonwovens | |
EP1092054B1 (en) | Method for producing a non-woven fibre fabric | |
EP2758217B1 (en) | Method and device for perforating a non-woven fabric by means of hydrodynamic needling | |
EP1046479A1 (en) | Apparatus for perforating and embossing web like materials | |
EP2041344B1 (en) | Apparatus for producing textiles, nonwoven substances, spunbonded fabrics, paper materials and/or perforated films | |
DE202013102203U1 (en) | Device for the hydrodynamic consolidation of nonwovens, woven or knitted fabrics | |
DE1635636A1 (en) | Method and device for the production of so-called non-woven fabrics, such as veils, felts and the like | |
DE10152075A1 (en) | Process for colorless, plastic patterning and solidification of a web and device for carrying out the process | |
DE1560701C3 (en) | Device for the production of a non-woven fiber material | |
DE102005036759A1 (en) | Device for patterning and strengthening nonwoven or knitted material by water jet treatment comprises a form with openings for patterning the material and punches for making holes in the material | |
WO2012098223A1 (en) | Device and method for producing a nonwoven composite fabric | |
DE19912279A1 (en) | Process and device for producing nonwovens with embossed or perforated patterns by means of hydrodynamic needling | |
WO2015185278A1 (en) | Method for producing a paper machine cloth | |
EP3129538A1 (en) | Jet manifold and method | |
DE102008033253A1 (en) | Producing a structured non-woven fabric, comprises impacting the non-woven that rests on a surface giving a structure with a medium such as water or vapor standing under pressure, and guiding the non-woven to be structured to a drum | |
EP3837391B1 (en) | Apparatus for compacting and/or structuring a nonwoven, and a structural shell | |
EP1806453B1 (en) | Method and device for dewatering a sheet of fibrous material | |
EP3404140A1 (en) | Transfer or shoe press belt for a paper machine, use of the belt in a paper machine and method for producing the belt | |
WO2009152791A1 (en) | Method and device for producing a non-woven fabric comprising filaments | |
EP2853629B1 (en) | Device for the hydrodynamic consolidation of nonwoven fabrics, woven fabrics or knitted fabrics | |
DE202012012535U1 (en) | Device for introducing through holes into a substrate by means of a laser device | |
DE102021134589A1 (en) | Roller arrangement for finishing windable, in particular pre-consolidated web goods and a corresponding web goods | |
DE102015217569B4 (en) | Process for producing spunbonded nonwoven webs |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20140320 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: D04H 1/492 20120101ALI20190701BHEP Ipc: D04H 18/04 20120101ALI20190701BHEP Ipc: D04H 1/495 20120101ALI20190701BHEP Ipc: B26F 1/26 20060101AFI20190701BHEP |
|
INTG | Intention to grant announced |
Effective date: 20190718 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: TRUETZSCHLER NONWOVENS & MAN-MADE FIBERS GMBH |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: REF Ref document number: 1208813 Country of ref document: AT Kind code of ref document: T Effective date: 20191215 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 502012015592 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: LANGUAGE OF EP DOCUMENT: GERMAN |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20191204 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200304 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200305 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200429 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20200404 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 502012015592 Country of ref document: DE |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
26N | No opposition filed |
Effective date: 20200907 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20200911 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20200930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200911 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200930 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200930 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200911 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200911 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200930 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20191204 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20220920 Year of fee payment: 11 Ref country code: AT Payment date: 20220921 Year of fee payment: 11 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PL Payment date: 20220902 Year of fee payment: 11 Ref country code: FR Payment date: 20220922 Year of fee payment: 11 |
|
P01 | Opt-out of the competence of the unified patent court (upc) registered |
Effective date: 20230622 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 502012015592 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MM01 Ref document number: 1208813 Country of ref document: AT Kind code of ref document: T Effective date: 20230911 |