EP1155178B1 - Verfahren und vorrichtung zur herstellung einer strukturierten, voluminösen vliesbahn oder folie - Google Patents

Verfahren und vorrichtung zur herstellung einer strukturierten, voluminösen vliesbahn oder folie Download PDF

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Publication number
EP1155178B1
EP1155178B1 EP99964520A EP99964520A EP1155178B1 EP 1155178 B1 EP1155178 B1 EP 1155178B1 EP 99964520 A EP99964520 A EP 99964520A EP 99964520 A EP99964520 A EP 99964520A EP 1155178 B1 EP1155178 B1 EP 1155178B1
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EP
European Patent Office
Prior art keywords
roller
web
positive
rollers
unstructured
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.)
Expired - Lifetime
Application number
EP99964520A
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German (de)
English (en)
French (fr)
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EP1155178A1 (de
Inventor
Werner Wagner
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Advanced Design Concepts GmbH
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Advanced Design Concepts GmbH
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Publication of EP1155178A1 publication Critical patent/EP1155178A1/de
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Publication of EP1155178B1 publication Critical patent/EP1155178B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding

Definitions

  • the invention relates to a method for producing a structured, voluminous nonwoven web or velorized foil from a thermoplastic by producing an unstructured Path and post-processing of the unstructured path through a pair of rollers consisting of a positive roller with numerous positive bodies distributed over the surface of the roller and from a negative roller with just as many depressions exists, the positive body during the rolling process intervene in the depressions and the path in the area of Roller interventions stretch, so that a deep-drawn, numerous Path structure having recesses results.
  • a raw fleece is made a variety of single filaments or staple fibers made from which a raw fleece is made. This Raw fleece is reworked by a second pair of rollers, the knobs engage in the recesses and the Stretch the raw fleece in the area of the roll interventions.
  • a similar procedure can also be applied to a unstructured film or on a velor film, such as according to DE 195 24 076 C1 is known.
  • a device is also known from DE 78 04 478 U1 to produce a moisture-permeable film in which a film of thermoplastic material so far is heated so that it has a deformation temperature close to that has thermoplastic temperature range of the material. At this temperature, the film is inserted into an embossing gap and while embossing while cooling deformed in the thermoplastic temperature range.
  • the embossing gap is between a cooled and an engraved one Metal cylinder and an elastic roller formed. Behind The foil is in contact with the embossing gap on the metal cylinder cooled further. Then the ends of the generated ones Expressions through brief heating on or over the the temperature applied during the deformation shrunk, the openings forming.
  • the task arises, one according to the known method manufactured film or web in the provided with recesses Areas at the bottom of these wells with an opening, Perforation or even just thinning that a vapor or liquid passage through these perforations or dilutions is possible.
  • the invention is thus in the field of technology Production of perforated, three-dimensional webs, as they are especially for disposable hygiene products be used.
  • the main task here is already developed methods in a relatively simple manner expand to the extent that the manufactured by the method three-dimensional structured tracks in more reliable Perforations on the wells without changing the essential procedural steps Need to become.
  • the method mentioned at the beginning can be supplemented by this be that after passing the web through the nip the deformed and still adhering to the positive roller Membrane in the top area of the knobs with a perforating, contacted and perforated, in particular, tearing tool, in particular is torn open, at least in each case perforation or thinning in the area of the sole the depression is generated.
  • Both method options represent embodiments of the same Invention, namely the basic idea that in a already fluffy web, namely fleece or velor Foil, generally in the apex area with a recess a greater tension is generated, which is true in the course of the process and over a certain service life, however, at the moment of creation, a introduced crack or thinning increases or expands so that there is a perforation at the desired location or, depending on the choice of material, a thinning occurs.
  • the method is particularly suitable for that from DE 195 47 319 known method in which when using a Nonwoven web is first made of a raw nonwoven that consists of a There are a large number of individual filaments that are stretched and tangled down to a fiber layer, the initial Stretching the individual filaments only in the range of 50 to 70% of the maximum possible stretch is done, and then the fiber layer is pressed and welded and in this form is processed further. Further processing is then carried out by engaging knobs that the raw fleece in Stretch the area of the roller interventions and corresponding perforations leave.
  • needle or hot rollers are particularly suitable.
  • the needle or hot rollers can with one temperature operated from 140 ° to 200 ° C in the contact areas.
  • the structuring of the method according to the invention manufactured product is improved in that the negative roller has an engraving that leads to an engraving of the positive roller is inverse, so that when the rollers roll, elevations, such as bars and knobs on the Surface of one of the rollers are arranged in compatible Grooves and troughs on the surface of the other roller intervention.
  • the positive bodies of the positive roller are advantageously in rows arranged knobs, and the surface of the negative roller has Lamellar webs arranged in the axial direction with intermediate ones Wells so that when rolling the rollers against each other, the slats in those kept free by the knobs Intervene alleys.
  • the rollers of the pair of rollers can be made of metal.
  • the metal has essentially that for both rolls same Rockwell hardness (HRC) greater than 50 HRC.
  • a positive and / or as a negative roller it is particularly advantageous as a positive and / or as a negative roller to use such a roller, which has a metal core has and the outer jacket by a plastic coating of the metal core is formed.
  • a plastic outer jacket can be engraved in particular by means of a laser, which enables the roller to move quickly and inexpensively Patterns of any type can be provided.
  • a Engraving laser can be operated very precisely and fully automatically, the patterns can be applied with such high precision that it is possible to use the plastic-coated surfaces the positive and the negative roller with very fine intermeshing To provide patterns.
  • the height of the knobs is preferably between 0.8 and 2. mm.
  • the focus is on the three-dimensional structure of the goods to be manufactured.
  • the mutual spacing of the knobs in a linear arrangement should be between 1 and 2.5 mm.
  • the number of knobs on 100 cm 2 roller surface is preferably between 2000 and 3000.
  • the knobs can end in different tip shapes, for example, they can be designed like an onion tower or in a pyramid with a tip angle of 90 ° ⁇ 20 ° leak.
  • the rollers can also be of different heights during the process be tempered, preferably the temperature of the Negative roller at a temperature at least 20 ° C lower is set as that of the positive roller.
  • the following are suitable as starting materials for web production other polyethylene, polypropylene, polyamide, polyvinyl alcohol, Polyester, polyetherester or polycarbonate.
  • thermoplastics are suitable from which structured foils according to the known methods have it made.
  • nonwovens are can be used from the aforementioned thermoplastics according to the Spunmelt process, the carding process, the airlaid process, the spunlaced process or the melt blown process were manufactured.
  • a nonwoven, a foil or a velor foil can be used, the due to a pair of rollers consisting of nub and matrix rollers is sent and after passing through the nip with the help of one pressed onto the pimples on the velor foil Hot roller, perforated if necessary with friction becomes.
  • Manufacturing process for such a velor film are known from the patent DE 195 24 076. With the present method it is possible in the sole of the depression to create an opening so that the recess is practical represents a small funnel. It will be a full one Perforation of the fleece or another web achieved, wherein the three-dimensionality that has already been created or is yet to be created remains fully intact. It is astonishing that the production speed already at the experimental stage could be increased 300 meters per minute. That speed can be particularly by using a higher temperature of the pimpled roller at a significantly lower Raise the temperature of the negative roller.
  • the opening on the forming positive roller becomes the path widened and displaced remaining fibers there or melted down.
  • the opening structure of the fleece or the Web is thereby improved.
  • a roller assembly as part of an implementation device the above process modifications is thereby characterized in that the positive roller provided with positive bodies combs with a negative roller and the roller pair one further positive roller is connected, the positive areas with the rotation of the rollers with the depressions of the Negative roller coincides.
  • the pair of rollers can also be followed by a needle roller, with which the web, which is still resting on the positive bodies and is already provided with depressions, can be perforated.
  • a needle roller with which the web, which is still resting on the positive bodies and is already provided with depressions, can be perforated.
  • the already mentioned second version of the method is the opposite Path.
  • a precisely structured, heated needle roller required to deliberately pre-perforate the To cause web.
  • Intervention of the positive roller in each case existing perforation expanded and stabilized.
  • a die roller takes that In the middle of the roller stand.
  • the positive roller is underneath arranged.
  • the locations of the individual needles or tufts of needles are in the rotation of the rollers with the increases in Positive roller compatible.
  • the needle roller runs with the positive roller synchronous and perforated a web as it passes in a first step where, in the further course of the Path processing recesses arise.
  • the temperature of the needle roller at the top of the Needle brought to 140 ° and 250 ° C if it is polyethylene or polypropylene. For polyesters and others This temperature is higher for plastics, for example 180 ° to 300 ° C.
  • the needle roller mechanically perforates or melts the web Fibers or film so that a stable pre-perforation is created.
  • the web peeled off the positive roller also shows after the recess has been made, a clear and defined opening. The three-dimensionality is retained.
  • First is the hole formed by the needle roller is very small, for example 0.05 to 0.1 mm diameter. It will then be on one Diameter from 0.5 to 1.4 mm brought by the targeted Intervention of the knob roller.
  • the web is stretchable accordingly of their material selection.
  • a storage silo 1 contains a thermoplastic granulate, for example made of a polyethylene, polypropylene, polyamide, polyvinyl alcohol, polyester, polyether ester or polycarbonate which can be processed into a nonwoven. It passes into a heatable extruder 2, where it is plasticized and conveyed from the extruder screw 2 'to the nozzle 3 of the extruder. The extrudate is then fed into a spinneret via a guide trunk 4 and, in accordance with the so-called spunlaced method, is cooled and stretched as a filament in an attenuator 18. The single fiber is not fully drawn here.
  • the raw strand then arrives at a roll stand 20.
  • the Roll stands are arranged three rolls one above the other.
  • the roller 10a is one Positive roller with numerous, over the surface of the roller distributed knobs, as can be seen, for example, from FIG. 2.
  • the knobs can have a truncated pyramid or truncated cone shape have, but they can also taper to a point, for example in a pyramid with an acute angle of 90 ° ⁇ 20 °.
  • FIG. 3 shows an example of processing a such foil.
  • the film runs as an unstructured web 32 with a material thickness of 60 ⁇ m with its velor top against the nub roller 10a in the nip 21 on.
  • the unstructured web 32 is formed in the roll gap 21 and a three-dimensional structure with numerous fine ones Cylinders pulled out.
  • the structure corresponds in detail the respective roller surface.
  • a 190 ° hot steel roller 23 is placed against the roller 10a and driven slightly friction against the roller 10a.
  • the heating roller which runs non-stick on its surface is moving against the passing roller 10a and causes the shrinking film to open and tear open in the area of the sole of the depression. It follows a small funnel with an opening at the bottom.
  • the perforated and three-dimensionally formed film pulled off the roller 31, chilled and wrapped. The surface shows an even, very fine velor effect.
  • the production of the film as such is described in the patent specification DE 195 24 076th
  • the top layer is 40 ⁇ m and that Back layer 20 ⁇ m thick.
  • the top film is a mixture of two made by the metallocene process HDPE products.
  • the film also contains lubricants, Pigments, stabilizers and release agents.
  • an HDPE is used, the lower one Has melt index.
  • the film can be made according to the known Chill-roll processes are made and with a velor effect be provided. The resulting from the velor effect Knobs can also be stretched.
  • the steel roller 23 can also be a very dense brush roller with steel tips be provided.
  • the negative roller 10b has a temperature from 40 to 60 ° C
  • the middle roller has a temperature of about 150 ° C
  • the upper negative roller 31 again a temperature from only 40 to 60 ° C.
  • the brush roller can also brought to a temperature of 120 to 150 ° C.
  • a roller arrangement is shown in FIG the unstructured web 32 into a nip 25 is introduced, with the help of a needle roller 24 before Passing the unstructured path 32 through the other Roller gap 21 in the later apex area of the knobs 11 these Roller 24 perforated or thinned the material and each at least one perforation of the dilution in the area of the later sole of the depression is generated.
  • the continued Film then passes into the nip 21, where during the Rolling the positive body, that is nubs 11, in the Intervening recesses and the web 32 in the area of the roller interventions stretch.
  • the recesses in their Peak area further torn open and / or further thinned.
  • the structured and perforated web is from the roller 10a deducted and sent for further processing.
  • the temperature of the roller 10a is about 140 to 160 ° C, while the roller 10b only a temperature of 40 ° C.
  • the needle roller 24 is at a needle tip temperature heated from 160 ° C.
  • the roller stand can be used 4 for nonwovens or films.
  • Figure 5 shows a further variant.
  • a hot roller 26 which is at a temperature of 120 ° to Is brought to 130 ° C and works with low friction the web lying on the knobs 11 torn, that is provided with thinners and perforations.
  • the web is again in a gap 25 between a negative roller 27 and the positive roller 10a inserted and again deep drawn and stretched.
  • This roller has a temperature of 60 ° C.
  • the structured film 33 is withdrawn via a film trigger 34 and a bearing fed.
  • a base film is used for this the base of polyethylene with elastic properties that is produced as a two-layer film.
  • the film is 2.5% Provide titanium dioxide and lubricant.
  • the starting film has for example, a thickness of 50 microns and can then can be used well for hygiene applications. It shows one quick penetration for moisture and exhibits due to excellent three-dimensionality rewetting values on. By filling with kaolin, chalk or titanium dioxide the film gets a very "dry grip".
  • FIG 6 is an enlarged view and schematic shown a film structure. It can be seen that the Troughs 120 have an approximately pyramid-like shape and with Perforations 122 are provided on the trough sole. The hollows are separated from one another by webs 121. The proportions are illustrated by the "1 cm" scale.
  • Figure 7 shows a similar structure.
  • a velor foil have been used, each with very fine cylindrical Troughs are provided, which are in their respective bases are open.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Laminated Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
EP99964520A 1998-12-04 1999-12-03 Verfahren und vorrichtung zur herstellung einer strukturierten, voluminösen vliesbahn oder folie Expired - Lifetime EP1155178B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19856223A DE19856223B4 (de) 1998-12-04 1998-12-04 Verfahren und Vorrichtung zur Herstellung einer strukturierten, voluminösen Vliesbahn oder Folie
DE19856223 1998-12-04
PCT/EP1999/009484 WO2000034562A1 (de) 1998-12-04 1999-12-03 Verfahren und vorrichtung zur herstellung einer strukturierten, voluminösen vliesbahn oder folie

Publications (2)

Publication Number Publication Date
EP1155178A1 EP1155178A1 (de) 2001-11-21
EP1155178B1 true EP1155178B1 (de) 2004-02-25

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Application Number Title Priority Date Filing Date
EP99964520A Expired - Lifetime EP1155178B1 (de) 1998-12-04 1999-12-03 Verfahren und vorrichtung zur herstellung einer strukturierten, voluminösen vliesbahn oder folie

Country Status (10)

Country Link
US (1) US6739024B1 (zh)
EP (1) EP1155178B1 (zh)
JP (1) JP2002531726A (zh)
CN (1) CN1109146C (zh)
AT (1) ATE260354T1 (zh)
AU (1) AU3035400A (zh)
DE (2) DE19856223B4 (zh)
DK (1) DK1155178T3 (zh)
ES (1) ES2214909T3 (zh)
WO (1) WO2000034562A1 (zh)

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CN106498627A (zh) * 2016-10-10 2017-03-15 天鼎丰材料技术有限公司 聚丙烯纺粘针刺土工布的生产系统、生产方法
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WO2019104240A1 (en) 2017-11-22 2019-05-31 Extrusion Group, LLC Meltblown die tip assembly and method
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AU3035400A (en) 2000-06-26
CN1109146C (zh) 2003-05-21
JP2002531726A (ja) 2002-09-24
WO2000034562A1 (de) 2000-06-15
ATE260354T1 (de) 2004-03-15
DE19856223A1 (de) 2000-06-08
US6739024B1 (en) 2004-05-25
DE59908676D1 (de) 2004-04-01
ES2214909T3 (es) 2004-09-16
CN1329686A (zh) 2002-01-02
DK1155178T3 (da) 2004-06-28
DE19856223B4 (de) 2004-05-13

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