EP1030939B1 - Procede et calandre pour traiter une bande - Google Patents

Procede et calandre pour traiter une bande Download PDF

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Publication number
EP1030939B1
EP1030939B1 EP98954375A EP98954375A EP1030939B1 EP 1030939 B1 EP1030939 B1 EP 1030939B1 EP 98954375 A EP98954375 A EP 98954375A EP 98954375 A EP98954375 A EP 98954375A EP 1030939 B1 EP1030939 B1 EP 1030939B1
Authority
EP
European Patent Office
Prior art keywords
web
roll
nip
calender
engraved
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
EP98954375A
Other languages
German (de)
English (en)
Other versions
EP1030939A1 (fr
Inventor
Klaus Dettmer
Achim Wandke
Vladimir Tocaj
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Original Assignee
Eduard Kuesters Maschinenfabrik GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eduard Kuesters Maschinenfabrik GmbH and Co KG filed Critical Eduard Kuesters Maschinenfabrik GmbH and Co KG
Publication of EP1030939A1 publication Critical patent/EP1030939A1/fr
Application granted granted Critical
Publication of EP1030939B1 publication Critical patent/EP1030939B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • 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
    • D04H1/54—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 by welding together the fibres, e.g. by partially melting or dissolving
    • 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 according to the Preamble of claim 1 and a calender according to the Preamble of claim 3.
  • the term "treat" is intended to encompass everything related to one by the action of a hot engraving elevation a fleece made of thermoplastic fibers local plastification or fusion can be achieved, in particular a thermal consolidation of the fleece by locally gluing the fibers (DE-OS 1 808 286, US-PS 3,478,141), but also perforation formation Melting of the fiber zone under an engraving elevation and displacing the molten mass, e.g. with the Calender according to DE 34 16 004 A1.
  • a steel engraving roller and a smooth counter roller Steel runs at the same peripheral speed around and form a pair of rollers through which a fleece is formed thermoplastic fibers is passed through.
  • the surveys the face of the engraving lies against the Counter roller and melt, because heated, the in between pinched portions of the fleece on and on and bind the fleece by welding the fibers or displace the melted mass to the edge of the face of the Engraving area.
  • the melted thermoplastic solidifies there Material and forms connection zones through the Edge the perforations formed and the fleece stabilize at the same time.
  • the web of the fleece is in all of these procedures by the many too compact material melted areas pretty stiff and boardy.
  • the invention has for its object the generic Develop the state of the art so that a fleece made of thermoplastic "treated” in the manner described Fibers are desirable in many cases gets a softer grip.
  • thermoplastic Plastic By breaking the rigid areas that are going through the local plasticizing or melting of the thermoplastic Plastic come about, crushed. Thereby the board-like feel of the fleece decreases considerably. So that the thermoplastic material of the fleece becomes brittle and the crushing action becomes more accessible, the web becomes of the fleece after leaving the roll gap and before Break cooled positively.
  • Such a “positive” cooling is said to be by means of a Cooling device can be understood, in contrast to the mere Cooling down by releasing heat to the environment.
  • Claim 2 gives the invention in its apparatus aspect again.
  • a first embodiment of a crushing device is shown in Claim 3 reproduced.
  • the embodiment according to claim 4 is particularly advantageous with regard to the uniformity that can be achieved across the web width the treatment of the fleece in the roll gap.
  • the web is cooled on the loop route the unheated or even cooled counter roll.
  • the crushing device can have several across the web arranged rollers comprise around which the web zigzag is directed (claim 5).
  • Fig. 1 shows a side view of a calender for implementation treatment within the meaning of the invention
  • Fig. 2 shows a side view of the nip of the calender 1 on an enlarged scale
  • Fig. 3 shows a Fig. 1 corresponding view of the Realizing invention extended to a crushing roller calender
  • Fig. 4 shows a corresponding view of a calender with another breaking device.
  • FIG. 1 and 2 show a specific example of a calender in which the on the web 20 of the nonwoven 20 treatment is a perforation.
  • the calender shown in Fig. 1 comprises an engraving roller 1 made of steel and a counter roller 2, which on a cylindrical roller body 3 a hard plastic covering 4 of 90 Shore D, for example.
  • a roll gap 5 in which a pre-consolidated Web 20 of a thermoplastic fiber Fleece V is initiated. Since it's on the introduction a line pressure that is even across the width of the web is very popular in the nip 5, at least one of the two rollers 1, 2 are designed as a deflection-controllable roller.
  • the ends of the rollers 1, 2 are in a machine frame stored and are against each other in the direction of the arrow pressed.
  • the plastic covering 4 of the counter roller 2 has a smooth cylindrical surface 7.
  • the engraving roller 1 carries over distributed their entire surface evenly and in a pattern Gavurerhebept 8, the outer end faces 9 in a cylinder surface 10 are located.
  • the engraving surveys 8 have a diamond-shaped in the embodiment Cross section, in a tangential plane of the cylinder surface 10 seen, and the largest dimension of the cross section is a few millimeters, e.g. 2 mm.
  • the light ones Distances between the individual engravings 8 are of the same order of magnitude.
  • the fleece V is pre-consolidated so that the fibers are held together and not prematurely and individually with the on 220 ° C heated surface of the engraving roller 1 in contact come.
  • the rollers 1, 2 rotate in the direction of the arrows 6 and the forward movement of the fleece V in the sense of Arrow 11 is the fleece V between the front of the Gravity elevation 8 'and the circumference 7 of the roller 2 compressed, and it gets heat from the engraving elevation 8 'into that Fleece V transferred, which makes this in the vicinity of Engraving elevation 8 'begins to soften and melt, what in Fig. 2 by the dotted representation of the corresponding Cross-sectional areas should be indicated.
  • there the heat does not flow out of the End face 9 'of the upstream portion 8' of the fleece V in the plastic covering 4, because of this has a low thermal conductivity and in the Available short time an essential removal not possible.
  • the 8 '' engraving elevation has the narrowest part of the Roll gap 5 reached and lies with its end face 9 '' practically on the outer circumference 7 of the plastic covering 4.
  • the molten material of zone 12 is due to the pressure the engraving elevation 8 '' between the end face 9 '' and the outer circumference 7 of the plastic covering 4 has been displaced and forms a compacted one that surrounds the engraved elevation 8 ′′ Ring 13 in the material of the fleece V.
  • the respective compacted ring 13 is a rigid surface element, which the fleece V after cooling under the softening range of the thermoplastic material gives a boardiness or a hard grip, which in is undesirable in many cases.
  • the pair of rollers is, according to FIG Fig. 1 by a crushing roller 15 with a plastic covering 16 of z.
  • the breaking takes place in the roll gap 25, after the the web of the fleece 20 on the way around the unheated Counter roll 2 has cooled sufficiently.
  • Rollers 1 and 15 are, as indicated by the arrows, deflection controllable and clamp the counter roller 2 between them. On this way the treatment effect is across the width of the Path particularly even.
  • FIG 4 shows an embodiment in which the roller pair 1, 2 is followed by a cooling section 17 and the breaking device is formed separately.
  • the Fleece V is made after leaving the nip 5 from a Blowing the nozzle device 18 with cooling air to increase the plasticity of the fleece from the rings 13 formed therein to the Perforations 14 significantly reduce.
  • the path of the Fleece V then passes a set of four each other parallel, circumferential to the path, in the running direction of the fleece V successively at a short distance Rollers 19 of small diameter in the embodiment are arranged in one plane and over the the fleece V is guided in a zigzag, so that through the Hinund Bending a breaking effect occurs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Nonwoven Fabrics (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

L'invention concerne une calandre pour traiter une bande (20) constituée d'un non-tissé (V) de fibres thermoplastiques, ladite calandre comprenant un cylindre d'impression chauffé (1) en acier et un contre-cylindre (2) tournant à la même vitesse périphérique. Les plastifications et les fusions superficielles locales du non-tissé (V), produites au niveau des bosses d'impression, confèrent au non-tissé un toucher carteux. Pour réduire ce phénomène, la bande (20) du non-tissé (V) est aplanie après avoir subi un refroidissement au moins partiel.

Claims (6)

  1. Procédé de traitement d'une bande (20) formée d'un non-tissé (V) de fibres thermoplastiques par action de la pression et de la chaleur à l'aide d'un cylindre de gravure (1) tournant, chauffé, réalisé en acier et d'un contre-cylindre (2) coopérant avec celui-ci, la bande (20) étant conduite dans l'intervalle (5) entre le cylindre de gravure (1) et le contre-cylindre (2), pour réaliser des plastifications locales ou des fusions du non-tissé à l'endroit des points des bossages de gravure (8),
    caractérisé en ce que
    la bande (20), en quittant l'intervalle des cylindres , est refroidie de manière positive et on casse les parties plastifiées ou fondues du non-tissé (V) à la sortie de l'intervalle (5) des cylindres.
  2. Calandre pour traiter une bande (20) d'un non-tissé (V) de fibres thermoplastiques sous action de la pression et de la chaleur, comprenant :
    un cylindre de gravure (1) en acier, rotatif, chauffé,
    un contre-cylindre (2) coopérant avec celui-ci,
    des moyens pour conduire la bande (20) dans l'intervalle (5) entre le cylindre de gravure (1) et le contre-cylindre (2) et
    des moyens pour presser l'un contre l'autre le cylindre de gravure (1) et le contre-cylindre (2) pour que la gravure dans la bande (2) au passage de l'intervalle (5) des cylindres, dans le non-tissé (V), génère aux endroits des bossages (8) de la gravure, des parties locales plastifiées ou fondues de non-tissé (V),
    caractérisée en ce que
    l'intervalle (5) des cylindres est suivi d'une installation de refroidissement positive de la bande (20) et celle-ci est suivie d'une installation pour casser les parties plastifiées ou fondues qui ont durci à la sortie de l'intervalle (5) des cylindres.
  3. Calandre selon la revendication 2,
    caractérisée en ce que
    l'installation comprend un troisième cylindre (15) formant une calandre à trois cylindres avec les cylindres (1, 2) et qui est non chauffé, voire même refroidi.
  4. Calandre selon la revendication 3,
    caractérisée en ce que
    les trois cylindres (1, 2, 15) ont leurs axes situés dans un plan et les deux cylindres extérieurs (1, 15) sont réalisés par des cylindres commandés en flexion, qui enserrent entre eux le cylindre intermédiaire (2).
  5. Calandre selon la revendication 2,
    caractérisée en ce que
    l'installation comporte des rouleaux (19) parallèles, qui se suivent, et disposés transversalement à la bande (20), cette bande (20) entourant les cylindres selon un tracé en zigzag.
  6. Calandre selon l'une quelconque des revendications 2 à 5,
    caractérisée en ce qu'
    il est précédé d'une installation de pré-renforcement de la bande (20) de non-tissé (V).
EP98954375A 1997-11-14 1998-10-08 Procede et calandre pour traiter une bande Expired - Lifetime EP1030939B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29720192U DE29720192U1 (de) 1997-11-14 1997-11-14 Kalander zum Behandeln einer Bahn
DE29720192U 1997-11-14
PCT/EP1998/006390 WO1999025911A1 (fr) 1997-11-14 1998-10-08 Procede et calandre pour traiter une bande

Publications (2)

Publication Number Publication Date
EP1030939A1 EP1030939A1 (fr) 2000-08-30
EP1030939B1 true EP1030939B1 (fr) 2002-01-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP98954375A Expired - Lifetime EP1030939B1 (fr) 1997-11-14 1998-10-08 Procede et calandre pour traiter une bande

Country Status (5)

Country Link
US (1) US6395211B1 (fr)
EP (1) EP1030939B1 (fr)
JP (1) JP2001523772A (fr)
DE (2) DE29720192U1 (fr)
WO (1) WO1999025911A1 (fr)

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Also Published As

Publication number Publication date
US6395211B1 (en) 2002-05-28
JP2001523772A (ja) 2001-11-27
DE29720192U1 (de) 1999-03-25
WO1999025911A1 (fr) 1999-05-27
DE59802673D1 (de) 2002-02-21
EP1030939A1 (fr) 2000-08-30

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