EP0819788B1 - Verfahrenshilfsmittel für ein Nadelfilz, ein unter Anwendung dieses Verfahrenshilfsmittels hergestelltes Nadelfilz und Verfahren zu dessen Herstellung - Google Patents

Verfahrenshilfsmittel für ein Nadelfilz, ein unter Anwendung dieses Verfahrenshilfsmittels hergestelltes Nadelfilz und Verfahren zu dessen Herstellung Download PDF

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Publication number
EP0819788B1
EP0819788B1 EP97111983A EP97111983A EP0819788B1 EP 0819788 B1 EP0819788 B1 EP 0819788B1 EP 97111983 A EP97111983 A EP 97111983A EP 97111983 A EP97111983 A EP 97111983A EP 0819788 B1 EP0819788 B1 EP 0819788B1
Authority
EP
European Patent Office
Prior art keywords
needle
needling aid
aid according
needling
approx
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
EP97111983A
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English (en)
French (fr)
Other versions
EP0819788A2 (de
EP0819788A3 (de
Inventor
Gerald Amannt
Wolfang Dr. Holstein
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.)
Saint Gobain Isover SA France
Original Assignee
Saint Gobain Isover SA France
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Publication date
Application filed by Saint Gobain Isover SA France filed Critical Saint Gobain Isover SA France
Priority to SI9730567T priority Critical patent/SI0819788T1/xx
Publication of EP0819788A2 publication Critical patent/EP0819788A2/de
Publication of EP0819788A3 publication Critical patent/EP0819788A3/de
Application granted granted Critical
Publication of EP0819788B1 publication Critical patent/EP0819788B1/de
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
    • D04H1/42—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 characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass fibres
    • 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

Definitions

  • the present invention concerns a needling aid for producing needle felts of mineral wool in accordance with claim 1, and its use for producing a needle felt in accordance with claim 10.
  • Needle felts are particularly suited for thermal insulation in household appliances, for instance in ovens and cookers as well as in industrial muffle-type furnaces.
  • a needling aid, or finishing agent For needle-punching mineral wool felts, a needling aid, or finishing agent, must be applied onto the fibers as an additive. Such finishing agents are variously produced on the basis of mineral oils, natural oils or fatty acid derivatives. The finishing agent is required for making the fibers smooth and reducing their mutual friction during the needle-punching process to prevent breakage or rupturing of the fibers during needle-punching as far as possible. The finishing agent must furthermore be capable of binding dusts released during the production process, to thereby permit processing and utilisation of the needle felt in the absence of any additional dust protection measures.
  • finishing agents are sprayed onto the fibers in the chute of a fiberising machine for the molten glass material, or directly onto the felt mat. This implies a tradeoff with respect to viscosity inasmuch as sufficient spraying must be ensured on the one hand, whereas a material having a sufficiently high viscosity must be retained following evaporation of the carrier material in order to guarantee the above mentioned advantages for the needle-punching process.
  • a thixotropising additive is used with a standard finishing agent on a fatty acid polyglycolester basis.
  • Such a thixotropising additive has the advantage of having a high viscosity at rest and thus holding the fiber loops in their anchoring positions achieved by the needle-punching process, whereas the presence of a low dynamic viscosity results in good needle-punching properties and a good lubricating effect. Owing to a high degree of fluidity while the needles are acting on the felt to be needle-punched, it is possible to have to add only small quantities of needling aid, whereby malodors under the effect of heat are correspondingly diminished.
  • the needling aid of the invention contains an aqueous dispersion of at least one at least partly halogenated polymer and an alcohol, on the one hand there result excellent oil-like finishing agent properties owing to the molecular conditions, and on the other hand those are chemically inert, halogenated polymers which, as a rule, resist thermal decomposition or are otherwise decomposed into nontoxic products.
  • Such partly halogenated polymers are selected from the group consisting of:
  • perfluorated perchlorated
  • perbrominated are meant to indicate that practically each hydrogen atom within the polymer is replaced by a corresponding halogen atom, wherein one or both terminal groups can be not halogenated or partly halogenated.
  • Formaldehyde could be detected neither in the chute nor in the final needle felt which was exposed to a temperature of up to 500°C for approx. 1 hour.
  • the perfluorated polyethers in accordance with claim 4 have hitherto turned out to be particularly suitable needling aids as they bring about extremely favorable sliding properties between the fiber loops during needle-punching on the one hand, and as practially all hydrogen atoms within the polyether system are replaced by fluorine atoms on the other hand, such perfluorated polyethers are chemically inert and also thermally resistant.
  • the perfluorated polyether in accordance with claim 5 has been found to be a particularly preferred embodiment of a needling aid, which is commercially available e.g. under the designation Fomblin FE 20C.
  • Adding a sterically inhibited alcohol, preferably t-butanol, to the needling aid in addition to the halogenated polymer in accordance with claims 6 and 7 has the advantage that the dispersion is stabilised by it, with the t-butanol, having a boiling point of approx. 80°C, instantaneously evaporating in the chute without furthermore leaving behind any decomposition products. Addition of such an alcohol stabilises the dispersion or emulsion in water of the polymer used.
  • a particularly preferred needling aid is one in accordance with claim 8, wherein the dispersion is present as an aqueous micro-emulsion.
  • Such micro-emulsion has the advantage that it presents homogeneous distribution of the utilised halogenated polymer in water even without any costly mixing processes, such that the obtained good results are also reproduceable in subsequent lots.
  • the aqueous emulsion Upon application onto the fibers of the mineral wool, in particular glass wool, the aqueous emulsion preferably has a concentration of approx. 0.1 to 0.5% (wt.) of halogenated polymer and approx. 0.05 to 0.45% (wt.) of t-butanol. At these final concentrations during application onto the mineral wool, only small quantities of needling aid are required to obtain the properties desired for needle-punching.
  • the needle felts according to the invention are therefore well suited for thermal insulation in household appliances, in particular ovens and cookers, inasmuch as they produce neither unpleasant smells nor toxic decomposition products upon initial operation at the location of the end user.
  • the needling aid according to the invention is suited for needle-punching mineral wool, particularly, however, having the form of glass wool.
  • aqueous micro-emulsion of a perfluoropolyether commercially available under the designation "Fomblin FE 20C" was used.
  • This emulsion has a polymer content of approx. 20% (wt.) and is stabilised with approx. 18% (wt.) of t-butanol.
  • the commercially available solution is diluted with water to a polymer content of approx. 12% (wt.).
  • 3 kg of the 12% emulsion are then added into 250 kg of water and mixed by means of a propeller agitator.
  • a needle felt produced from glass wool in this manner has a bulk density of approx. 50 kg/m 3 and a thickness of approx. 17 mm.
  • the needle felts thus produced were subjected to thermal load at approx. 250°C in a standard kitchen in accordance with DIN 44971 in previously annealed cookers, and possibly produced decomposition products were analysed.
  • the needle felts of the present invention therefore have excellent suitability for use in household appliances such as ovens or cookers as a heat insulation material, as it was also found in tests with such apparatus that malodors occurred neither upon initial use nor upon use over a period of several weeks, and that toxic products are not released into the surrounding atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Claims (12)

  1. Nadelhilfsmittel zur Herstellung von Nadelfilzen aus Mineralwolle, dadurch gekennzeichnet, daß es eine wäßrige Dispersion aus mindestens einem zumindest teilweise halogenierten Polymer umfaßt, das ausgewählt ist aus der Gruppe bestehend aus: halogenierten Polyethern, halogenierten Polgestern, halogenierten Polyolen ebenso wie deren Mischungen, und einem Alkohol.
  2. Nadelhilfsmittel nach Anspruch 1, dadurch gekennzeichnet, daß die Polyether, Polyester und/oder Polyole fluoriert, chloriert und/oder bromiert sind.
  3. Nadelhilfsmittel nach Anspruch 2, dadurch gekennzeichnet, daß die Polyether, Polyester und/oder Polyole perfluoriert, perchloriert und/oder perbromiert sind.
  4. Nadelhilfsmittel nach Anspruch 3, dadurch gekennzeichnet, daß es einen perfluorierten Polyether enthält.
  5. Nadelhilfsmittel nach Anspruch 4, dadurch gekennzeichnet, daß der perfluorierte Polyether die folgende allgemeine Formel aufweist: CF3-(O-CF(CF3)-CF2)n-(O-CF2)m-O-CF2-R wobei R = -COO-NO4 + oder -C(OH)2-CF3, und n und m ganze Zahlen sind, wobei n/m ungefähr 20 bis 40 ist.
  6. Nadelhilfsmittel nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Alkohol ein sterisch gehinderter Alkohol ist.
  7. Nadelhilfsmittel nach Anspruch 6, dadurch gekennzeichnet, daß der Alkohol t-Butanol ist.
  8. Nadelhilfsmittel nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die Dispersion in Form einer wäßrigen Mikroemulsion vorliegt.
  9. Nadelhilfsmittel nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die wäßrige Emulsion die folgenden Konzentrationen aufweist, nachdem sie auf die Mineralwollfasern aufgebracht wurde:
    ungefähr 0,1 bis 0,5 % (Gew.) Polymer
    ungefähr 0,05 bis 0,45 % (Gew.) t-Butanol
  10. Verwendung eines Nadelhilfsmittels nach einem der Ansprüche 1 bis 9 zur Herstellung eines Nadelfilzes aus Mineralwolle.
  11. Verwendung nach Anspruch 10, dadurch gekennzeichnet, daß der erzeugte Nadelfilz kein Formaldehyd abgibt, nachdem er auf ungefähr 500 °C erwärmt wurde.
  12. Verwendung nach einem der Ansprüche 10 oder 11, dadurch gekennzeichnet, daß das Nadelhilfsmittel nach einem der Ansprüche 1 bis 9 der Filzmatte zugegeben wird und letztere dann genadelt wird.
EP97111983A 1996-07-15 1997-07-14 Verfahrenshilfsmittel für ein Nadelfilz, ein unter Anwendung dieses Verfahrenshilfsmittels hergestelltes Nadelfilz und Verfahren zu dessen Herstellung Expired - Lifetime EP0819788B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9730567T SI0819788T1 (en) 1996-07-15 1997-07-14 Needling aid for producing needle felts, a needle felt produced by using it, and a method for production thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19628477 1996-07-15
DE19628477A DE19628477C1 (de) 1996-07-15 1996-07-15 Nadelhilfsmittel und dessen Verwendung zur Herstellung von Nadelfilzen und damit hergestellter Nadelfilz

Publications (3)

Publication Number Publication Date
EP0819788A2 EP0819788A2 (de) 1998-01-21
EP0819788A3 EP0819788A3 (de) 2000-02-02
EP0819788B1 true EP0819788B1 (de) 2003-05-07

Family

ID=7799867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97111983A Expired - Lifetime EP0819788B1 (de) 1996-07-15 1997-07-14 Verfahrenshilfsmittel für ein Nadelfilz, ein unter Anwendung dieses Verfahrenshilfsmittels hergestelltes Nadelfilz und Verfahren zu dessen Herstellung

Country Status (4)

Country Link
EP (1) EP0819788B1 (de)
DE (2) DE19628477C1 (de)
ES (1) ES2197268T3 (de)
SI (1) SI0819788T1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202401A1 (de) 2016-02-17 2017-08-17 Saint-Gobain Isover G+H Ag Nadelhilfsmittel zur Herstellung von Nadelfilzen aus Mineralwolle sowie damit hergestellter Nadelfilz

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801243B1 (fr) 1999-11-18 2006-06-02 Saint Gobain Isover Procede pour appliquer une couche isolante sur une surface d'un objet et produit isole correspondant
ITVE20130008A1 (it) * 2013-03-18 2014-09-19 Eurofibre Spa Dispersione acquosa utilizzata come ausilio di agugliatura per produrre feltri in fibre minerali.-
ITUA20164647A1 (it) * 2016-06-24 2017-12-24 Eurofibre Spa Ausilio di agugliatura da utilizzare nella produzione di feltri agugliati in lana minerale e metodo per realizzare feltri agugliati
FR3054636B1 (fr) 2016-08-01 2019-01-25 Saint-Gobain Isover Procede d'isolation et appareil obtenu
GB201615896D0 (en) * 2016-09-19 2016-11-02 Knauf Insulation Doo Skofja Loka Mineral wool insulation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3913191A (en) * 1972-01-28 1975-10-21 Fiberwoven Corp Fluid aid for needling
US4654235A (en) * 1984-04-13 1987-03-31 Chemical Fabrics Corporation Novel wear resistant fluoropolymer-containing flexible composites and method for preparation thereof
DE3835007A1 (de) * 1988-10-13 1990-04-19 Gruenzweig & Hartmann Verfahren zur herstellung von nadelfilz aus steinwolle
CA2129380A1 (en) * 1993-08-11 1995-02-12 Kenichi Sanechika Lubricant oil composition comprising a fluorine-containing aromatic compound and an alkyl- or alkyl derivative-substituted aromatic compound, and a refrigerant composition containing the same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016202401A1 (de) 2016-02-17 2017-08-17 Saint-Gobain Isover G+H Ag Nadelhilfsmittel zur Herstellung von Nadelfilzen aus Mineralwolle sowie damit hergestellter Nadelfilz
EP3208246A1 (de) 2016-02-17 2017-08-23 Saint-Gobain Isover Vernadelungsadditiv zur herstellung von nadelfilzen aus mineralwolle und damit hergestellter nadelfilz

Also Published As

Publication number Publication date
EP0819788A2 (de) 1998-01-21
DE19628477C1 (de) 1998-01-22
DE69721649T2 (de) 2003-11-27
DE69721649D1 (de) 2003-06-12
SI0819788T1 (en) 2003-10-31
ES2197268T3 (es) 2004-01-01
EP0819788A3 (de) 2000-02-02

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