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EP1198631A1 - Bonded-fibre fabric for producing clean-room protective clothing - Google Patents

Bonded-fibre fabric for producing clean-room protective clothing

Info

Publication number
EP1198631A1
EP1198631A1 EP00949395A EP00949395A EP1198631A1 EP 1198631 A1 EP1198631 A1 EP 1198631A1 EP 00949395 A EP00949395 A EP 00949395A EP 00949395 A EP00949395 A EP 00949395A EP 1198631 A1 EP1198631 A1 EP 1198631A1
Authority
EP
European Patent Office
Prior art keywords
nonwoven fabric
fabric according
filaments
water jet
protective clothing
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.)
Granted
Application number
EP00949395A
Other languages
German (de)
French (fr)
Other versions
EP1198631B1 (en
Inventor
Robert Groten
Holger Schilling
Arnold Bremann
Hartwig von der Mühlen
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg 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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Publication of EP1198631A1 publication Critical patent/EP1198631A1/en
Application granted granted Critical
Publication of EP1198631B1 publication Critical patent/EP1198631B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • D04H3/10—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 yarns or filaments made mechanically
    • D04H3/11—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 yarns or filaments made mechanically by fluid jet
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/12—Hygroscopic; Water retaining
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
    • 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
    • D04H3/005—Synthetic yarns or filaments
    • D04H3/009—Condensation or reaction polymers
    • 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
    • D04H3/016—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the fineness
    • 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
    • D04H3/018—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the shape
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/608—Including strand or fiber material which is of specific structural definition
    • Y10T442/614—Strand or fiber material specified as having microdimensions [i.e., microfiber]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/637—Including strand or fiber material which is a monofilament composed of two or more polymeric materials in physically distinct relationship [e.g., sheath-core, side-by-side, islands-in-sea, fibrils-in-matrix, etc.] or composed of physical blend of chemically different polymeric materials or a physical blend of a polymeric material and a filler material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/689—Hydroentangled nonwoven fabric
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/69—Autogenously bonded nonwoven fabric

Definitions

  • Protective clothing for clean rooms has the function that the products manufactured or processed in these rooms (e.g. microelectronic parts, pharmaceuticals, optical glass fibers) before humans as a "source” for the emission of disturbing particles (e.g. dust or skin particles, bacteria) to protect.
  • disturbing particles e.g. dust or skin particles, bacteria
  • Protective clothing material must retain both the particles permanently released by the human body (skin flakes, hair fragments, bacteria, etc.) and the fiber fragments detached from a textile underwear in order to avoid contamination of the clean room air and thus of the product. Of course, the material itself must not emit any fiber parts or other components in the clean room air.
  • the protective clothing material must have a high mechanical strength, in particular have a high tear and abrasion resistance in order to avoid the risk of cracks or holes being formed as a result of external influences or
  • the material In order to be able to reuse the protective clothing several times, the material must also withstand the washing or cleaning processes customary in the industry (in some cases sterilization in an autoclave) as undamaged as possible, i.e. resistant to wet mechanical abrasion and pilling as well as being sufficiently dimensionally stable. In addition to the barrier effect and (wet) mechanical resistance, the protective clothing material - especially for
  • the material should not become excessively electrostatically charged or should be able to dissipate and dissipate any charges quickly. This is necessary so that, on the one hand, sensitive microelectronic components are not damaged by selective discharges and, on the other hand, no dust particles from the ambient air are attracted, which can accumulate on the material surface and possibly be emitted again later.
  • the protective clothing material should also be sufficiently comfortable to wear, that is to say that it should have a textile character with regard to the case, handle and appearance, and be breathable and possibly also heat-insulating in order to avoid excessive sweating or freezing of the wearer.
  • Fibers with a titer of less than 1 dtex which are also referred to as “microfibers”, are understood here as “extremely fine”.
  • the term “super microfiber” is also used for microfibers with a titer of less than 0.3 dtex.
  • the actual protective clothing material is woven from the (textured) microfiber or microfilament yarns.
  • conductive threads in the form of a regular pattern, e.g. weave in stripes or plaid arrangement to achieve the required antistatic effect.
  • the conductive yarns contain e.g. Core / sheath filaments with a soot or graphite core or sheath or also e.g. Metal fibers or
  • Microfibre yarn weave achieved. However, this high weave density and the predominantly surface-parallel filament orientation are unfavorable with regard to the breathability of the material. Few exist Micropores or channels through which water vapor could be transported through the tissue.
  • Breathability of the protective clothing material can be achieved by using particle-tight, but water vapor permeable membranes.
  • Such "microporous" layers can be on normal density textile
  • Materials e.g. be applied by lamination or direct extrusion to obtain a material with a textile character.
  • Microfiber nonwovens are an alternative.
  • Microfiber nonwovens made from multi-segment or multi-core are limited. Microfiber nonwovens made from multi-segment or multi-core
  • Staple fibers which are split into individual microfibers after fleece laying and possibly pre-consolidation using solvents or water jets with a good barrier effect should offer significantly better wearing comfort than the above-calendered microfilament spunbonded fabrics.
  • microfiber non-woven fabric to produce a microfiber nonwoven fabric that has an extremely high filling density and thus a good barrier effect.
  • this nonwoven fabric lacks softness and heat insulation properties. As a result, the use of
  • Water jet bonded nonwovens for the (protective) clothing area are considered limited. Another method is therefore proposed in the cited patent in which the water jet technology is not used.
  • Patent document proposed to first thermally weld the nonwoven at certain points before the water jet splitting. This is to prevent the nonwoven from getting caught in the water jet splitting with the sieve belt of the water jet unit and then damaging or even damaging when it is lifted off
  • nonwoven fabric made of very fine filaments, which with woven or knitted textiles should have comparable properties.
  • the very fine filaments with a titer of 0.005 to 2 dtex are made from melt-spun, crimped or uncurled by means of water jet splits
  • the nonwoven fabric obtained in this way can still be used in various ways
  • spunbonded nonwovens produced by this process are said to be outstandingly suitable for the production of clothing and other textile products.
  • Nonwovens produced by EP patent 97 108 364 are very well suited for the production of clean room protective clothing if they consist of supermicrofilaments with titers less than 0.2 dtex and moreover
  • the supermicrofilaments themselves are produced by water jet splitting from multi-component filaments with a titer of less than 2 dtex, which are formed by melt spinning, aerodynamically
  • the present invention thus describes a novel one
  • Nonwoven material and the process steps for its production The nonwoven meets all the requirements for a reusable material Cleanroom protective clothing material. It is characterized by a high
  • Barrier effect a high mechanical resilience and dimensional stability, an efficient antistatic effect and a high level of comfort (breathability and textile character). These favorable properties remain even after repeated washing or
  • the nonwoven fabric consists of supermicrofilaments with a titre of less than 0.2 dtex, which are produced from uncrimped primary filaments with a titer of 1.5 to 2 dtex.
  • Bicomponent multisegment filaments made of two incompatible polymers, in particular polyester and polyamide, are preferably used as primary filaments. This combination is known, in this respect reference is made to EP 97 108 364.
  • the proportion of the polyester is chosen higher than that of the polyamide, preferably between 60 to 70% by weight. In order to achieve the required antistatic effect, one of the two or
  • both polymers with corresponding permanently active, i.e. not washable or washable additives.
  • the antistatic effect can e.g. by mixing carbon black or graphite or by adding polymers
  • the primary bicomponent filaments have a cross-section with orange-like multi-segment structure (“pie structure”). The segments alternately each contain one of the incompatible, additized polymers. This known filament cross-section has proven to be favorable for the production of the super microfilaments described below.
  • the desired high abrasion resistance and low tendency to pilling To achieve the nonwoven fabric, the primary filaments are subjected to a further drawing and tempering process after the usual aerodynamic drawing ("hot-channel stretching").
  • the primary filaments produced in this way are deposited on a moving belt in a random arrangement by means of special units and then pre-consolidated using conventional water jet technology, i.e. mechanically intertwined. Subsequently, the pre-consolidated primary filament fleece is subjected to high pressure water jets on both sides on perforated drums several times, the primary filaments being practically completely divided into their components, i.e. into the individual super microfilaments
  • microfiber fleece which, on the one hand, has the required high barrier effect due to its extremely random and intermingled fiber structure, but on the other hand is still sufficiently permeable to water vapor.
  • the microfiber nonwoven is used after the water jet splitting and Subsequent drying subjected to a hot air heat setting process under tension.
  • the nonwoven is then embossed in a calender with a special engraving roller in order to further increase the dimensional stability and abrasion resistance.
  • the finished nonwoven has a basis weight of 80 to 150 g / m 2 , preferably 95 to 115 g / m 2 .
  • a nonwoven fabric with a basis weight of 95 g / m 2 with a uniform thickness of bicomponent filaments consisting of 70% poly (ethylene terephthalate) and 30% poly (hexamethylene adipamide) is produced.
  • the primary filaments have a titer of 1.6 dtex and contain 16 segments, which are alternately made up of polyester or polyamide.
  • the melt-spun filaments are stretched aerodynamically, placed randomly on a belt and subjected to a water jet treatment in which the filaments are pre-consolidated.
  • the pre-consolidated fleece is then treated with high-pressure water jets, the primary filaments being split into the individual segments and these being further entangled.
  • the water jet splitting is carried out several times from both sides of the nonwoven.
  • the resulting super microfilaments have an average titer of 0.1 dtex and are uncrimped.
  • the fleece is then dried and embossed calendered.
  • the nonwoven fabric produced in this way has a filter efficiency of approx. 60% for particles> 0.5 ⁇ m or approx. 98% for particles> 1 ⁇ m. After 30 washes with a standard detergent at 40 ° C, the filter efficiency drops only slightly to approx. 55% for particles> 0.5 ⁇ m or approx. 95% for particles> 1 ⁇ m.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Woven Fabrics (AREA)

Abstract

The invention relates to a bonded-fibre fabric for producing re-usable clean-room protective clothing, consisting of super micro filaments with a filament grade of less than 0.2 dtex, which are created in a water-jet splitting process from multicomponent, multisegment filaments with a filament grade of less than 2 dtex. Said filaments are spun from the melt, aerodynamically drawn, laid out in the form of a web and pre-bonded in a water-jet process, before being split.

Description

Vliesstoff zur Herstellung von Nonwoven fabric for the production of
Reinraum-SchutzbekleidungCleanroom protective clothing
Beschreibung des technischen GebietsDescription of the technical field
Schutzbekleidung für Reinräume hat die Funktion, die in diesen Räumen hergestellten bzw. verarbeiteten Erzeugnisse (z.B. Mikroelektronik-Teile, Pharmazeutika, optische Glasfasern) vor dem Menschen als „Quelle" für die Emission störender Partikel (z.B. Staub- oder Haut-Partikel, Bakterien) zu schützen.Protective clothing for clean rooms has the function that the products manufactured or processed in these rooms (e.g. microelectronic parts, pharmaceuticals, optical glass fibers) before humans as a "source" for the emission of disturbing particles (e.g. dust or skin particles, bacteria) to protect.
Wichtigste Anforderung an ein Material zur Herstellung derartiger Schutzbekleidung ist deshalb die Barrierewirkung. DasThe most important requirement for a material for the manufacture of such protective clothing is therefore the barrier effect. The
Schutzbekleidungsmaterial muß sowohl die vom menschlichen Körper permanent abgegebenen Partikel (Hautschuppen, Haarbruchstücke, Bakterien, etc.) als auch die von einer textilen Unterbekleidung abgelösten Faserbruchstücke zurückhalten, um eine Kontamination der Reinraumluft und damit des Erzeugnisses zu vermeiden. Selbstverständlich darf das Material auch selbst keine Faserteile oder andere Bestandteile in die Reinraumluft emittieren.Protective clothing material must retain both the particles permanently released by the human body (skin flakes, hair fragments, bacteria, etc.) and the fiber fragments detached from a textile underwear in order to avoid contamination of the clean room air and thus of the product. Of course, the material itself must not emit any fiber parts or other components in the clean room air.
Neben der erforderlichen Barrierewirkung muß das Schutzbekleidungsmaterial eine hohe mechanische Belastbarkeit, insbesondere eine hohe Weiterreiß- und Abriebfestigkeit aufweisen, um die Gefahr der Bildung von Rissen oder Löchern infolge Fremdeinwirkung bzw.In addition to the required barrier effect, the protective clothing material must have a high mechanical strength, in particular have a high tear and abrasion resistance in order to avoid the risk of cracks or holes being formed as a result of external influences or
normaler Tragebeanspruchung zu minimieren. Um die Schutzbekleidung auch mehrfach wiederverwenden zu können, muß das Material zudem die branchenüblichen Wasch- bzw. Reinigungsprozesse (z.T. Sterilisation im Autoklaven) möglichst unbeschadet überstehen, d.h. widerstandfähig gegen naß-mechanischen Abrieb und Pilling sowie ausreichend dimensionsstabil sein. Zusätzlich zur Barrierewirkung und (naß-)mechanischen Widerstandsfähigkeit muß das Schutzbekleidungsmaterial - insbesondere fürto minimize normal wear and tear. In order to be able to reuse the protective clothing several times, the material must also withstand the washing or cleaning processes customary in the industry (in some cases sterilization in an autoclave) as undamaged as possible, i.e. resistant to wet mechanical abrasion and pilling as well as being sufficiently dimensionally stable. In addition to the barrier effect and (wet) mechanical resistance, the protective clothing material - especially for
den Einsatz in Reinräumen der Mikroelektronik-Industrie - eine antistatischeuse in cleanrooms of the microelectronics industry - an antistatic
Wirkung aufweisen, d.h. das Material sollte sich durch die unvermeidliche Reibung beim Tragen nicht übermäßig elektrostatisch aufladen bzw. etwaige Aufladungen rasch dissipieren und ableiten können. Dies ist notwendig, damit zum einen sensible Mikroelektronik-Bauteile nicht durch punktuelle Entladungen beschädigt und zum anderen auch keine Staubpartikel aus der Umgebungsluft angezogen werden, die sich auf der Materialoberfläche anreichern und ggf. später wieder emittiert werden könnten.Have an effect, i.e. due to the inevitable friction when worn, the material should not become excessively electrostatically charged or should be able to dissipate and dissipate any charges quickly. This is necessary so that, on the one hand, sensitive microelectronic components are not damaged by selective discharges and, on the other hand, no dust particles from the ambient air are attracted, which can accumulate on the material surface and possibly be emitted again later.
Zudem sollte das Schutzbekleidungsmaterial auch einen ausreichend hohen Tragekomfort besitzen, d.h. einen möglichst textilen Charakter bzgl. Fall, Griff und Optik aufweisen sowie atmungsaktiv und ggf. auch wärmeisolierend sein, um ein übermäßiges Schwitzen bzw. Frieren des Trägers zu vermeiden. Stand der TechnikIn addition, the protective clothing material should also be sufficiently comfortable to wear, that is to say that it should have a textile character with regard to the case, handle and appearance, and be breathable and possibly also heat-insulating in order to avoid excessive sweating or freezing of the wearer. State of the art
Es ist bekannt, feinsttitrige Synthesefasern bzw. -filamente zur Herstellung von Reinraum-Schutzbekleidungsmaterial einzusetzen. Als "feinsttitrig" werden hier Fasern mit einem Titer kleiner 1 dtex verstanden, welche man auch als "Microfasern" bezeichnet. Für Microfasern mit einem Titer kleiner 0,3 dtex ist auch der Begriff "Supermicrofaser" gebräuchlich.It is known to use fine-titer synthetic fibers or filaments for the production of cleanroom protective clothing material. Fibers with a titer of less than 1 dtex, which are also referred to as "microfibers", are understood here as "extremely fine". The term "super microfiber" is also used for microfibers with a titer of less than 0.3 dtex.
Übliches Schutzbekleidungsmaterial auf Basis von Microfaser- bzw. Microfilament-Geweben bzw. -Gewirken wird in mehreren Verfahrensschritten hergestellt. Aus polymeren Rohstoffen werden zunächst Microfasern bzw. -Common protective clothing material based on microfibre or microfilament fabrics or knitted fabrics is produced in several process steps. First of all, microfibers or -
filamente gesponnen. Diese werden dann zu Garnen weiterverarbeitet, welche ggf. noch einen nachfolgenden Texturier-Prozeß durchlaufen. Aus den (texturierten) Microfaser- bzw. Microfilament-Garnen wird schließlich das eigentliche Schutzbekleidungsmaterial gewoben. Beim Webprozeß lassen sich zusätzlich leitfähige Garne in Form eines regulären Musters, z.B. in Streifen- oder Karo-Anordnung einweben, um die geforderte Antistatik-Wirkung zu erreichen. Die leitfähigen Garne enthalten z.B. Kem/Mantel-Filamente mit ruß- bzw. graphithaltigem Kern oder Mantel oder auch z.B. Metallfasern bzw.filaments spun. These are then further processed into yarns, which may also go through a subsequent texturing process. Finally, the actual protective clothing material is woven from the (textured) microfiber or microfilament yarns. In the weaving process, conductive threads in the form of a regular pattern, e.g. weave in stripes or plaid arrangement to achieve the required antistatic effect. The conductive yarns contain e.g. Core / sheath filaments with a soot or graphite core or sheath or also e.g. Metal fibers or
metallisierte Filamente. Die erforderliche Barrierefunktion und die hohe (naß- )mechanische Belastbarkeit wird durch eine extrem dichte und regelmäßigemetallized filaments. The required barrier function and the high (wet) mechanical resilience is ensured by an extremely dense and regular
Webung der Mikrofaser-Garne erreicht. Diese hohe Webdichte und die überwiegend oberflächen-parallele Filamentorientierung ist jedoch im Hinblick auf die Atmungsaktivität des Materials ungünstig. Es existieren nur wenige Mikroporen bzw. -kanäle, durch bzw. über die ein Transport von Wasserdampf durch das Gewebe erfolgen könnte.Microfibre yarn weave achieved. However, this high weave density and the predominantly surface-parallel filament orientation are unfavorable with regard to the breathability of the material. Few exist Micropores or channels through which water vapor could be transported through the tissue.
Die problematische Eigenschaftskombination aus Barrierewirkung undThe problematic combination of properties of barrier effect and
Atmungsaktivität des Schutzbekleidungsmaterials läßt sich durch die Verwendung von partikeldichten, aber wasserdampfdurchlässigen Membranen erreichen. Solche „mikroporösen" Schichten können auf normaldichte textileBreathability of the protective clothing material can be achieved by using particle-tight, but water vapor permeable membranes. Such "microporous" layers can be on normal density textile
Materialien z.B. durch Laminierung oder Direktextrusion aufgebracht werden, um ein Material mit textilem Charakter zu erhalten.Materials e.g. be applied by lamination or direct extrusion to obtain a material with a textile character.
Der Fertigungsprozeß für hochdichte Mikrofilament-Gewebe wie auch für Verbundmaterialien aus atmungsaktiver Barrieremembran und Textil istThe manufacturing process for high-density microfilament fabrics as well as for composite materials made of breathable barrier membrane and textile is
mehrstufig und damit relativ zeitaufwendig. Als einfacher herzustellendemulti-stage and therefore relatively time-consuming. As an easier to manufacture
Alternative bieten sich Mikrofaser-Vliesstoffe an.Microfiber nonwovens are an alternative.
Flächig kalandrierte Mikrofilament-Spinnvliesstoffe auf Polyethylen-Basis können die Barriere-Anforderungen erfüllen und sind zudem sehr kostengünstig herzustellen. Derartige Materialien sind jedoch praktisch luft- bzw. wasser-Flat calendered microfilament spunbonded nonwovens based on polyethylene can meet the barrier requirements and are also very inexpensive to manufacture. However, such materials are practically air or water
dampfdicht und besitzen einen folienartigen Charakter, d.h. ihr Tragekomfort ist gering. Außerdem sind sie nur unzureichend wasch- bzw. reinigungsbeständig, so daß sich ihre Anwendung auf Einweg- bzw. Wegwerf-Schutzbekleidungvapor-tight and have a film-like character, i.e. their comfort is low. In addition, they are insufficiently washable or cleaning-resistant, so that they can be used on disposable or disposable protective clothing
beschränkt. Microfaser-Vliesstoffe, hergestellt aus Multisegment- bzw. aus Multicore-limited. Microfiber nonwovens made from multi-segment or multi-core
Stapelfasern, welche nach der Vlieslegung und einer evtl. Vorverfestigung mittels Lösemittel oder Wasserstrahlen in einzelne Microfasern aufgesplittet werden, sollten bei guter Barrierewirkung einen erheblich besseren Tragekomfort als die o.g. hochkalandrierten Mikrofilament-Spinnvliese bieten.Staple fibers, which are split into individual microfibers after fleece laying and possibly pre-consolidation using solvents or water jets with a good barrier effect should offer significantly better wearing comfort than the above-calendered microfilament spunbonded fabrics.
In der EP-Patentschrift 0 624 676 wird z.B. ein Verfahren beschrieben,In EP patent 0 624 676 e.g. described a process
wie man durch Wasserstrahlsplitten einen Microfaser-Vliesstoff herstellen kann, der eine extrem große Fülldichte und damit auch gute Barrierewirkung hat. Diesem Vliesstoff fehlt es aber an Weichheit und Wärmeisolationseigenschaften. Demzufolge wird die Verwendung vonhow to use microfiber non-woven fabric to produce a microfiber nonwoven fabric that has an extremely high filling density and thus a good barrier effect. However, this nonwoven fabric lacks softness and heat insulation properties. As a result, the use of
wasserstrahlverfestigten Vliesstoffen für den (Schutz-)Bekleidungsbereich als begrenzt angesehen. In der genannten Patentschrift wird deshalb ein anderes Verfahren vorgeschlagen, bei dem die Wasserstrahl-Technik nicht zur Anwendung kommt.Water jet bonded nonwovens for the (protective) clothing area are considered limited. Another method is therefore proposed in the cited patent in which the water jet technology is not used.
In der PCT-Anmeldung WO 98 I 23 804 wird abweichend zur o.g. Patentschrift vorgeschlagen, den Vliesstoff vor dem Wasserstrahlsplitten zunächst punktuell thermisch zu verschweißen. Dadurch soll verhindert werden, daß sich der Vliesstoff beim Waserstrahlsplitten mit dem Siebband des Wasserstrahl-Aggregats verhakt und dann beim Abheben beschädigt oder garIn PCT application WO 98 I 23 804, in deviation from the above. Patent document proposed to first thermally weld the nonwoven at certain points before the water jet splitting. This is to prevent the nonwoven from getting caught in the water jet splitting with the sieve belt of the water jet unit and then damaging or even damaging when it is lifted off
zerstört wird. Zum anderen soll damit ein höherer Grad an Faserteilung erreicht werden, woraus verbesserte Barriere- und Tasteigenschaften resultieren sollten. Eine Erweiterung des Anwendungsbereichs von Vliesstoffen wird auch in der EP-Patentschrift 97 108 364 angestrebt. Dort wird die Herstellung eines Vliesstoffs aus sehr feinen Filamenten beschrieben, der mit gewobenen oder gewirkten Textilien vergleichbare Eigenschaften haben soll. Die sehr feinen Filamente mit einem Titer von 0,005 bis 2 dtex werden mittels Wasserstrahlsplitten aus schmelzgesponnenen, gekräuselten oder ungekräu¬gets destroyed. On the other hand, a higher degree of fiber division is to be achieved, which should result in improved barrier and tactile properties. An expansion of the field of application of nonwovens is also sought in EP 97 108 364. There is described the production of a nonwoven fabric made of very fine filaments, which with woven or knitted textiles should have comparable properties. The very fine filaments with a titer of 0.005 to 2 dtex are made from melt-spun, crimped or uncurled by means of water jet splits
selten Mehrkomponenten-Multisegmentfilamenten mit Titern von 0,3 dtex bis 10 dtex erzeugt. Der so erhaltene Vliesstoff kann noch in unterschiedlicher Weiserarely multicomponent multisegment filaments with titers from 0.3 dtex to 10 dtex produced. The nonwoven fabric obtained in this way can still be used in various ways
nachbehandelt werden (z.B. mittels Thermofixierung, Punktkalandrierung, etc.), um spezielle Gebrauchseigenschaften zu erzielen. Die nach diesem Verfahren hergestellten Spinnvliesstoffe sollen sich hervorragend zur Herstellung von Kleidungsstücken und anderen textilen Erzeugnissen eignen.are treated (e.g. by means of heat setting, point calendering, etc.) in order to achieve special usage properties. The spunbonded nonwovens produced by this process are said to be outstandingly suitable for the production of clothing and other textile products.
Darstellung der ErfindungPresentation of the invention
In nachfolgenden Untersuchungen konnte überraschenderweise festgestellt werden, daß sich gemäß o.g. EP-Patentschrift 97 108 364 hergestellte Vliesstoffe sehr gut zur Herstellung von Reinraum-Schutzbekleidung eignen, wenn sie aus Supermicrofilamenten mit Titern kleiner 0,2 dtex bestehen und zudemIn subsequent investigations it was surprisingly found that according to the above. Nonwovens produced by EP patent 97 108 364 are very well suited for the production of clean room protective clothing if they consist of supermicrofilaments with titers less than 0.2 dtex and moreover
prägekalandriert werden. Die Supermicrofilamente selbst werden durch Wasserstrahlsplitten aus Mehrkomponenten-Filamenten mit einem Titer kleiner 2 dtex erzeugt, die im Schmelzspinnverfahren gebildet, aerodynamischbe embossed calendered. The supermicrofilaments themselves are produced by water jet splitting from multi-component filaments with a titer of less than 2 dtex, which are formed by melt spinning, aerodynamically
verstreckt und mittels Wasserstrahlen vorverbundenen wurden.were stretched and pre-connected by means of water jets.
Die vorliegende Erfindung beschreibt folglich ein neuartigesThe present invention thus describes a novel one
Vliesstoffmaterial sowie die Verfahrensschritte zu dessen Herstellung. Der Vliesstoff erfüllt alle Anforderungen an ein mehrfach wiederverwendbares Reinraum-Schutzbekleidungsmaterial. Er zeichnet sich durch eine hoheNonwoven material and the process steps for its production. The nonwoven meets all the requirements for a reusable material Cleanroom protective clothing material. It is characterized by a high
Barrierewirkung, eine hohe mechanische Belastbarkeit und Dimensionsstabilität, eine effiziente antistatische Wirkung sowie einen hohen Tragekomfort (Atmungsaktivität und textiler Charakter) aus. Diese günstigen Eigenschaften bleiben auch nach mehrmaligen, branchenüblichen Wasch- bzw.Barrier effect, a high mechanical resilience and dimensional stability, an efficient antistatic effect and a high level of comfort (breathability and textile character). These favorable properties remain even after repeated washing or
Reinigungsprozessen (bis zu 30 Zyklen) in ausreichendem Umfang erhalten. Die Summe dieser Eigenschaften wurde bisher als nicht erreichbar mit einem Vliesstoff mit gesplitteten Feinstfilamenten angesehen.Sufficient cleaning processes (up to 30 cycles). The sum of these properties was previously considered unattainable with a nonwoven fabric with split fine filaments.
Der Vliesstoff besteht aus Supermicrofilamenten mit Titern kleiner 0,2 dtex, welche aus ungekräuselten Primärfilamenten einem Titer von 1 ,5 bis 2 dtex erzeugt werden. Als Primärfilamente werden bevorzugt Bikomponenten- Multisegmentfilamente aus zwei inkompatiblen Polymeren, insbesondere aus Polyester und Polyamid eingesetzt. Diese Kombination ist bekannt, insoweit wird auf die EP 97 108 364 verwiesen. Der Anteil des Polyesters wird höher gewählt als der des Polyamids, bevorzugt zwischen 60 bis 70 Gew.-%. Um die erforderliche antistatische Wirkung zu erreichen, wird eines der beiden oderThe nonwoven fabric consists of supermicrofilaments with a titre of less than 0.2 dtex, which are produced from uncrimped primary filaments with a titer of 1.5 to 2 dtex. Bicomponent multisegment filaments made of two incompatible polymers, in particular polyester and polyamide, are preferably used as primary filaments. This combination is known, in this respect reference is made to EP 97 108 364. The proportion of the polyester is chosen higher than that of the polyamide, preferably between 60 to 70% by weight. In order to achieve the required antistatic effect, one of the two or
beide Polymere mit entsprechenden permanent wirksamen, d.h. nicht ab- bzw. auswaschbaren Additiven versehen. Die Antistatikwirkung kann z.B. durch Einmischung von Ruß bzw. Graphit oder durch Beimischung von Polymeren mitboth polymers with corresponding permanently active, i.e. not washable or washable additives. The antistatic effect can e.g. by mixing carbon black or graphite or by adding polymers
stark hydrophilem Charakter oder von Polymeren mit (halb-)leitfähigen Eigenschaften, evt. unter Zugabe von Kompatibilisierungsmitteln erzielt werden. Die primären Bikomponenten-Filamente besitzen einen Querschnitt mit orangenartiger Multisegment-Struktur („Pie-Struktur"). Die Segmente enthalten alternierend jeweils eines der inkompatiblen, additivierten Polymere. Dieser an sich bekannte Filamentquerschnitt hat sich als günstig für die nachfolgend beschriebene Erzeugung der Supermicrofilamente erwiesen. Um die gewünschte hohe Abriebfestigkeit und geringe Pillingneigung des Vliesstoffs zu erreichen, werden die Primärfilamente im Anschluß an die übliche aerodynamische Verstreckung einem weiteren Verstreck- und gleichzeitigem Temperprozeß unterworfen („Hot-Channel Stretching").strong hydrophilic character or of polymers with (semi) conductive properties, possibly with the addition of compatibilizers. The primary bicomponent filaments have a cross-section with orange-like multi-segment structure (“pie structure”). The segments alternately each contain one of the incompatible, additized polymers. This known filament cross-section has proven to be favorable for the production of the super microfilaments described below. The desired high abrasion resistance and low tendency to pilling To achieve the nonwoven fabric, the primary filaments are subjected to a further drawing and tempering process after the usual aerodynamic drawing ("hot-channel stretching").
Die so erzeugten Primärfilamente werden mittels spezieller Aggregate in regelloser Anordnung auf einem bewegten Band abgelegt und anschließend mittels konventioneller Wasserstrahltechnik vorverfestigt, d.h. mechanisch miteinander verschlungen. Anschließend wird das vorverfestigte Primärfilament-Vlies auf perforierten Trommeln mehrmals beidseitig mit Hochdruck-Wasserstrahlen beaufschlagt, wobei die Primärfilamente praktisch vollständig in ihre Bestandteile, d.h. in die einzelnen SupermicrofilamenteThe primary filaments produced in this way are deposited on a moving belt in a random arrangement by means of special units and then pre-consolidated using conventional water jet technology, i.e. mechanically intertwined. Subsequently, the pre-consolidated primary filament fleece is subjected to high pressure water jets on both sides on perforated drums several times, the primary filaments being practically completely divided into their components, i.e. into the individual super microfilaments
zerfallen und diese gleichzeitig extrem homogen miteinander verwirbelt werden. Durch diesen Prozeßschritt wird ein Microfaservlies erzeugt, welches aufgrund seiner extrem regellosen und verwirbelten Faserstruktur einerseits die erforderliche hohe Barrierewirkung aufweist, anderseits aber noch ausreichend durchlässig für Wasserdampf ist.disintegrate and at the same time they are swirled together extremely homogeneously. This process step produces a microfiber fleece which, on the one hand, has the required high barrier effect due to its extremely random and intermingled fiber structure, but on the other hand is still sufficiently permeable to water vapor.
Um die Dimensionsstabilität bei Wasch- und Reinigungsprozessen zu verbessern, wird der Microfaservliesstoff nach dem Wasserstrahlsplitten und anschließender Trocknung einem Heißluft-Thermofixierprozeß unter Spannung unterworfen. Anschließend wird der Vliesstoff in einem Kalander mit spezieller Gravurwalze prägekalandriert, um die Dimensionsstabilität und Abriebfestigkeit weiter zu erhöhen. Der fertige Vliesstoff hat ein Flächengewicht von 80 bis 150 g/m2, vorzugsweise von 95 bis 115 g/m2.In order to improve the dimensional stability in washing and cleaning processes, the microfiber nonwoven is used after the water jet splitting and Subsequent drying subjected to a hot air heat setting process under tension. The nonwoven is then embossed in a calender with a special engraving roller in order to further increase the dimensional stability and abrasion resistance. The finished nonwoven has a basis weight of 80 to 150 g / m 2 , preferably 95 to 115 g / m 2 .
Beispielexample
Es wird zunächst ein Vliesstoff mit einem Flächengewicht von 95 g/m2 mit gleichmäßiger Dicke aus Bikomponenten-Fiiamenten, bestehend aus 70 % Poly(ethylenterephthalat) und 30 % Poly(hexamethylenadipamid) hergestellt. Die Primärfilamente haben einen Titer von 1 ,6 dtex und enthalten 16 Segmente, die abwechselnd aus dem Polyester bzw. Polyamid aufgebaut sind. Die schmelzgesponnenen Filamente werden aerodynamisch gestreckt, regellos auf einem Band abgelegt und einer Wasserstrahlbehandlung zugeführt, in der eine erste Vorverfestigung der Filamente erfolgt. Anschließend wird das vorverfestigte Vlies mit Hochdruckwasserstrahlen behandelt, wobei die Primärfilamente in die einzelnen Segmente gesplittet und diese weiter verknäuelt werden. Das Wasserstrahlsplitten wird mehrfach von beiden Seiten des Vliesstoffs durchgeführt. Die entstehenden Supermicrofilamente haben einen mittleren Titer von 0,1 dtex und sind ungekräuselt. Das Vlies wird anschließend getrocknet und prägekalandriert. Der so hergestellte Vliesstoff hat eine Filtereffizienz von ca. 60 % für Partikel > 0,5 μm bzw. von ca. 98 % für Partikel > 1 μm. Nach 30-maliger Waschbehandlung mit einem Standardwaschmittel bei 40°C sinkt die Filtereffizienz nur unwesentlich auf ca. 55 % für Partikel > 0,5 μm bzw. auf ca. 95% für Partikel > 1 μm. First, a nonwoven fabric with a basis weight of 95 g / m 2 with a uniform thickness of bicomponent filaments consisting of 70% poly (ethylene terephthalate) and 30% poly (hexamethylene adipamide) is produced. The primary filaments have a titer of 1.6 dtex and contain 16 segments, which are alternately made up of polyester or polyamide. The melt-spun filaments are stretched aerodynamically, placed randomly on a belt and subjected to a water jet treatment in which the filaments are pre-consolidated. The pre-consolidated fleece is then treated with high-pressure water jets, the primary filaments being split into the individual segments and these being further entangled. The water jet splitting is carried out several times from both sides of the nonwoven. The resulting super microfilaments have an average titer of 0.1 dtex and are uncrimped. The fleece is then dried and embossed calendered. The nonwoven fabric produced in this way has a filter efficiency of approx. 60% for particles> 0.5 μm or approx. 98% for particles> 1 μm. After 30 washes with a standard detergent at 40 ° C, the filter efficiency drops only slightly to approx. 55% for particles> 0.5 μm or approx. 95% for particles> 1 μm.

Claims

Patentansprüche claims
1. Vliesstoff zur Herstellung mehrfach wiederverwendbarer Reinraum- Schutzbekleidung, bestehend aus Supermicrofilamenten mit einem Titer1. Nonwoven fabric for the production of reusable clean room protective clothing, consisting of super microfilaments with a titer
kleiner 0,2 dtex, die ihrerseits durch Wasserstrahl-Splitten aus Mehrkomponenten-Filamenten (nachfolgend „Primärfilamente" genannt) mit einem Titer kleiner 2 dtex erzeugt werden, wobei die Primärfilamente aus der Schmelze gesponnen, aerodynamisch verstreckt, unmittelbar zu einem Vlies gelegt und vor dem Splitten einer Wasserstrahl-Vorverfestigung unterworfen werden.less than 0.2 dtex, which in turn are generated by water jet splitting from multicomponent filaments (hereinafter referred to as "primary filaments") with a titer less than 2 dtex, the primary filaments being spun from the melt, aerodynamically stretched, immediately laid into a fleece and laid in front be subjected to splitting a water jet pre-consolidation.
2. Vliesstoff nach Anspruch 1 , dadurch gekennzeichnet, daß die Primärfilamente nach der aerodynamischen Verstreckung einem zusätzlichen Verstreck- und Temperprozeß unterworfen werden.2. Nonwoven fabric according to claim 1, characterized in that the primary filaments are subjected to an additional drawing and tempering process after the aerodynamic drawing.
3. Vliesstoff nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Primärfilamente Bikomponenten-Filamente aus zwei inkompatiblen Polymeren, insbesondere aus einem Polyester und einem Polyamid3. Nonwoven fabric according to claim 1 or 2, characterized in that the primary filaments bicomponent filaments made of two incompatible polymers, in particular a polyester and a polyamide
darstellen.represent.
4. Vliesstoff nach Anspruch 3, dadurch gekennzeichnet, daß der Polyester- Anteil höher als der Polyamid-Anteil ist. 4. Nonwoven fabric according to claim 3, characterized in that the polyester portion is higher than the polyamide portion.
5. Vliesstoff nach Anspruch 4, dadurch gekennzeichnet, daß der Polyester-5. Nonwoven fabric according to claim 4, characterized in that the polyester
Anteil, bezogen auf das Vliesstoff-Gesamtgewicht, zwischen 60 und 70Share, based on the total nonwoven weight, between 60 and 70
Gew.-% beträgt.% By weight.
6. Vliesstoff nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß das6. Nonwoven fabric according to claim 1 to 5, characterized in that the
Flächengewicht des Vliesstoffes zwischen 80 und 150 g/m2, vorzugsweiseBasis weight of the nonwoven fabric between 80 and 150 g / m 2 , preferably
zwischen 95 und 1 15 g/m2 beträgt.is between 95 and 1 15 g / m 2 .
7. Vliesstoff nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß die7. Nonwoven fabric according to claim 1 to 6, characterized in that the
Primärfilamente einen Querschnitt mit orangenartiger Multisegment-StrukturPrimary filaments a cross section with an orange-like multi-segment structure
aufweisen, wobei die Segmente alternierend jeweils eines der beidenhave, the segments alternately each one of the two
inkompatiblen Polymeren enthalten.incompatible polymers.
8. Vliesstoff nach Anspruch 1 bis 7, dadurch gekennzeichnet, daß das8. Nonwoven fabric according to claim 1 to 7, characterized in that the
Wasserstrahl-Splitten der Primärfilamente dadurch erfolgt, daß derWater jet splitting of the primary filaments takes place in that the
vorverfestigte Vliesstoff mehrfach abwechselnd von beiden Seiten mitPre-consolidated nonwoven fabric alternately from both sides
Hochdruck-Wasserstrahlen beaufschlagt wird.High pressure water jets are applied.
9. Vliesstoff nach Anspruch 8, dadurch gekennzeichnet, daß das9. Nonwoven fabric according to claim 8, characterized in that the
Wasserstrahl-Splitten auf einem Aggregat mit rotierenden SiebtrommelnWater jet splitting on an aggregate with rotating sieve drums
durchgeführt wird.is carried out.
10. Vliesstoff nach Anspruch 1 bis 9, dadurch gekennzeichnet, daß der10. Nonwoven fabric according to claim 1 to 9, characterized in that the
Vliesstoff nach dem Wasserstrahl-Splitten und anschließendem TrocknenNonwoven fabric after water jet splitting and then drying
prägekalandriert wird. is embossed calendered.
11. Vliesstoff nach Anspruch 1 bis 10, dadurch gekennzeichnet, daß der Vliesstoff nach dem Wasserstrahl-Splitten zusätzlich einer Thermofixierung und nachfolgend einem Thermosetting unterworfen wird.11. Nonwoven fabric according to claim 1 to 10, characterized in that the nonwoven fabric is additionally subjected to heat setting after the water jet splitting and subsequently a thermosetting.
12. Vliesstoff nach Anspruch 1 bis 11 , dadurch gekennzeichnet, daß eines der12. Nonwoven fabric according to claim 1 to 11, characterized in that one of the
beiden oder auch beide inkompatible Polymere ein permanent antistatisch wirkendes Additiv enthält, wie z.B. Ruß oder Graphit, ein Polymer mit ausgeprägt hydrophilem Charakter (z.B. ein Poly(amid-block-ether)- Copolymer, oder ein Polymer mit (halb-)leitfähigen Eigenschaften (z.B. ein Polyanilin- oder Polyacetylen-Derivat)contains both or both incompatible polymers with a permanently antistatic additive, e.g. Carbon black or graphite, a polymer with a pronounced hydrophilic character (e.g. a poly (amide block ether) copolymer, or a polymer with (semi) conductive properties (e.g. a polyaniline or polyacetylene derivative)
13. Vliesstoff nach Anspruch 1 bis 12, dadurch gekennzeichnet, daß die Supermicrofilamente ungekräuselt sind. 13. Nonwoven fabric according to claim 1 to 12, characterized in that the supermicrofilaments are uncrimped.
EP00949395A 1999-07-26 2000-07-21 Bonded-fibre fabric for producing clean-room protective clothing Expired - Lifetime EP1198631B1 (en)

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DE19934442C2 (en) 2001-09-20
ATE275653T1 (en) 2004-09-15
AR024954A1 (en) 2002-10-30
TR200200197T2 (en) 2002-06-21
JP3682432B2 (en) 2005-08-10
CN1365405A (en) 2002-08-21
AU760437B2 (en) 2003-05-15
PL353340A1 (en) 2003-11-17
WO2001007698A1 (en) 2001-02-01
CN1221698C (en) 2005-10-05
AU6276800A (en) 2001-02-13
TWI232248B (en) 2005-05-11
DE19934442A1 (en) 2001-02-08
DE50007702D1 (en) 2004-10-14
EP1198631B1 (en) 2004-09-08
US6815382B1 (en) 2004-11-09
HUP0201969A2 (en) 2007-09-28
ZA200200676B (en) 2004-06-30
CA2380220A1 (en) 2001-02-01
MXPA02000906A (en) 2002-07-30
JP2003505616A (en) 2003-02-12
KR20020029670A (en) 2002-04-19
BR0014014A (en) 2002-05-14

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