EP2444537A1 - Non-woven fabric for acoustic applications with increased sound absorption characteristics - Google Patents
Non-woven fabric for acoustic applications with increased sound absorption characteristics Download PDFInfo
- Publication number
- EP2444537A1 EP2444537A1 EP11180322A EP11180322A EP2444537A1 EP 2444537 A1 EP2444537 A1 EP 2444537A1 EP 11180322 A EP11180322 A EP 11180322A EP 11180322 A EP11180322 A EP 11180322A EP 2444537 A1 EP2444537 A1 EP 2444537A1
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- EP
- European Patent Office
- Prior art keywords
- nonwoven fabric
- micro hollow
- hollow body
- nonwoven
- micro
- 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
Links
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 26
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000000835 fiber Substances 0.000 claims abstract description 11
- 239000011230 binding agent Substances 0.000 claims abstract description 10
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 238000001035 drying Methods 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims abstract description 6
- 229920000728 polyester Polymers 0.000 claims abstract description 5
- 239000012209 synthetic fiber Substances 0.000 claims abstract description 4
- 229920002994 synthetic fiber Polymers 0.000 claims abstract description 4
- 239000000945 filler Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 7
- 239000003063 flame retardant Substances 0.000 claims description 6
- 229920001169 thermoplastic Polymers 0.000 claims description 6
- 239000004416 thermosoftening plastic Substances 0.000 claims description 6
- 238000009472 formulation Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 4
- 239000003380 propellant Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 3
- 239000004005 microsphere Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 abstract 1
- 210000002500 microbody Anatomy 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000004480 active ingredient Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000010751 BS 2869 Class A2 Substances 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003094 microcapsule Substances 0.000 description 1
- 239000002557 mineral fiber Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005596 polymer binder Polymers 0.000 description 1
- 239000002491 polymer binding agent Substances 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
Images
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
- D04H1/413—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 containing granules other than absorbent substances
-
- 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
- D04H1/58—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/587—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
-
- 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
- D04H1/58—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
- D04H1/64—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
- D04H1/645—Impregnation followed by a solidification process
Definitions
- the invention relates to a nonwoven fabric for acoustic applications with increased sound absorption properties, consisting of longitudinally oriented or cross-laid, in particular preconsolidated plastic fibers with a basis weight of 20g / m 2 to 100g / m 2 , preferably 30g / m 2 to 80g / m 2 , according to claim 1, a method for producing such a nonwoven fabric and the use of the nonwoven fabric material produced by the process according to the invention.
- Known ceiling panels for sound absorption have a perforation to effect the desired sound insulation by total reflection.
- High-quality sound absorption panels achieve a maximum absorption coefficient of 0.60.
- Standard panels are classified according to DIN 4102 in fire protection class B1. By selecting the appropriate material, the fire protection class A2 can also be achieved.
- the US 3,676,288 A shows a method with gas-filled microcavities, which serve to bind fibers together and perform an increase in volume.
- Binders which consist of thermoplastic particles and wherein a foam blowing agent is supplied.
- the nonwoven fabric for acoustic applications with increased sound absorption properties, which achieves a sound absorption coefficient of> 0.6.
- the nonwoven material should have a high flow resistance or a low air permeability at a low weight.
- the material should not be flammable, so that the DIN 53438 K1 is met.
- it is necessary to form the nonwoven material so that a high tensile strength in the longitudinal and transverse direction and a high rigidity is present while maintaining the necessary flexibility of the corresponding sheet material.
- the object of the invention is achieved by the nonwoven fabric according to combination of features according to claim 1, by the method for producing such a nonwoven material and by the inventive use of the inventively produced nonwoven fabric.
- nonwoven fabric for acoustic applications with increased sound absorption properties, wherein the nonwoven fabric of a longitudinal or cross-laid, in particular preconsolidated plastic fiber material having a basis weight of 20g / m 2 to 100g / m 2 , preferably 30g / m 2 to 80g / m 2 consists.
- the filler used is unexpanded hollow microbodies with a proportion of about 0.5 to 4% by weight.
- the binder used is a high molecular weight polyester material for fixing the hollow microbodies to the nonwoven fibers and for increasing the rigidity and tear resistance.
- any common aqueous-based polymer binder or binder mixture of acrylate, styrene butadiene or vinyl acetate polymers may be used.
- the nonwoven fabric is dried at temperatures such that expansion of the micro-hollow bodies occurs, whereby the pores of the nonwoven fabric are sealed, resulting in the desired sound absorption properties.
- a flame retardant of known type can readily be added to the equipment.
- the hollow microbodies consist of thermoplastic shells filled with propellant gas.
- unexpanded micro hollow bodies of propellant gas with a thermoplastic shell made of PVC or vinylidene chloride-acrylonitrile copolymers are used to densify the nonwoven fabric and to improve the acoustics as soon as the hollow microbodies are inflated.
- the drying is carried out according to the invention at temperatures between 100 ° C and 200 ° C, preferably between 140 ° C and 180 ° C.
- the amount of finish of the finishing formulation is about 20% to 50%, especially 30% to 40% of the web weight.
- the nonwoven material produced in this way can be used as a cover fleece for acoustic cover plates, for thermal insulation and sealing or else as cover and acoustic fleece in the automotive industry.
- the nonwoven base material is a per se known thermal nonwoven or otherwise prepared by, for example, hydroentanglement nonwoven material of longitudinal fibers, resulting in a uniform nonwoven image.
- the fibers used are PES, CoPES or similar fiber materials.
- the basis weight is in the range of 20 g / m 2 to 100 g / m 2 , ideally in the range between 30 g / m 2 to 80 g / m 2 with an air permeability of 1500 to 3000 l / m 2 ⁇ s (200 Pa).
- the finishing formulation contains a high molecular weight polyester binder for the necessary stiffness and for increasing the tensile strength or elongation and for bonding micro hollow bodies used according to the invention to the nonwoven fibers.
- a flame retardant z As red phosphorus or other commercially available flame retardants used.
- the nonwoven fabric is formed by adding initially unexpanded micro hollow bodies of propellant gas with a thermoplastic shell of PVC or vinylidene chloride-acrylonitrile copolymers.
- the hollow microbodies serve to densify the nonwoven material and to provide the desired improvement in acoustics after thermal treatment and consequent bloat.
- cover fleece can be coated with thermosetting or thermosetting adhesives.
- the coating is not applied over the entire surface in order to obtain the desired acoustic effect.
- the equipment is e.g. with a standard foulard.
- the drying takes place at temperatures which allow the hollow microspheres to expand into spheres to close the relatively large pores of the nonwoven material.
- the drying temperatures are in the range between 100 ° C and 200 ° C, preferably between 140 ° C and 180 ° C.
- the total amount of the formulation is 20% to 50% of the web weight, preferably 30% to 40% of the web weight.
- the proportion of micro hollow bodies in the nonwoven is according to the invention only 0.5% by weight to 4% by weight.
- the sealing of the nonwoven pores can be influenced in a wide range.
- the proportion can be increased to up to 20 wt .-%.
- the total amount of the capacity of the fiber structure is not overstressed in order to prevent the micro-hollow body rest on the surface and are easily abradable.
- the amount of added flame retardant depends on the fire protection requirements.
- a coating is made with commercially available thermoplastic or thermosetting adhesives in order to ensure a common type of further treatment for special cover fleece, which by means of pressure and temperature treatment to another medium, eg. As metal ceiling panels, glass fiber mats or polyurethane foam sheets are laminated.
- the fleece can be produced as a longitudinal or cross-laid binder fleece.
- the usual binder recipe here the micro hollow body are added directly. If necessary, the flame retardants are also added to the formulation. As a result, an equipment operation can be saved.
- Both manufacturing variants may include a calendering step to enhance the optics, i. H. to optimize the surface of the nonwoven material by removing imperfections without adversely affecting the tightness and desired acoustic properties.
- FIG. 1 shown schematic diagram shows an arrangement of synthetic fibers 1, in the already expanded micro hollow body 2 are introduced, with a large part of the fiber pores is closed by the micro hollow body 2, so that there is the desired increased sound absorption.
- FIG. 2 illustrates the above with reference to a photographic enlarged image of an inventively realized nonwoven fabric for acoustic applications.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Nonwoven Fabrics (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
Die Erfindung betrifft einen Vliesstoff für akustische Anwendungen mit erhöhten Schallabsorptionseigenschaften, bestehend aus längsgerichteten oder kreuzgelegten, insbesondere vorverfestigten Kunststofffasern mit einem Flächenausgangsgewicht von 20g/m2 bis 100g/m2, bevorzugt 30g/m2 bis 80g/m2, gemäß Patentanspruch 1, ein Verfahren zur Herstellung eines derartigen Vliesstoffes sowie die Verwendung des nach dem erfindungsgemäßen Verfahren hergestellten Vliesstoffmaterials.The invention relates to a nonwoven fabric for acoustic applications with increased sound absorption properties, consisting of longitudinally oriented or cross-laid, in particular preconsolidated plastic fibers with a basis weight of 20g / m 2 to 100g / m 2 , preferably 30g / m 2 to 80g / m 2 , according to claim 1, a method for producing such a nonwoven fabric and the use of the nonwoven fabric material produced by the process according to the invention.
Bekannte Deckenplatten zur Schallabsorption weisen eine Perforierung auf, um die gewünschte Schalldämmung durch Totalreflexion zu bewirken. Bei hochwertigen Schallabsorptions-Platten werden Schallabsorptionskoeffizienten von maximal 0,60 erreicht.Known ceiling panels for sound absorption have a perforation to effect the desired sound insulation by total reflection. High-quality sound absorption panels achieve a maximum absorption coefficient of 0.60.
Standardplatten sind nach DIN 4102 in der Brandschutzklasse B1 eingestuft. Durch eine entsprechende Materialauswahl kann auch die Brandschutzklasse A2 erreicht werden.Standard panels are classified according to DIN 4102 in fire protection class B1. By selecting the appropriate material, the fire protection class A2 can also be achieved.
Es ist ebenfalls bekannt, Deckenplattenkonstruktionen zusätzlich mit einem Vliesmaterial abzudecken oder zu beaufschlagen. Derartige Verkleidungen sollen die Akustik in Räumen verbessern, die eine entsprechende Deckenplattenkonstruktion aufweisen.It is also known to additionally cover or apply ceiling tile constructions to a nonwoven material. Such panels are intended to improve the acoustics in rooms having a corresponding ceiling panel construction.
Um die jeweiligen Brandschutzanforderungen zu erfüllen, bestehen bekannte Vliesmaterialien für derartige Abdeckanwendungen aus Glas- oder Mineralfaserstoffen mit all den hierdurch verbundenen Nachteilen bei der Handhabung und der möglicherweise hieraus folgenden Belastung der Raumluft.In order to meet the respective fire protection requirements, known nonwoven materials for such cover applications made of glass or mineral fiber materials with all the associated disadvantages in handling and possibly resulting burden of indoor air.
Die
Aus der
Gemäß der Lehre nach
Bei den mattenförmigen Formteilen nach
Aus dem Vorgenannten ist es Aufgabe der Erfindung, einen Vliesstoff für akustische Anwendungen mit erhöhten Schallabsorptionseigenschaften anzugeben, der einen Schallabsorptionskoeffizienten von > 0,6 erreicht. Das Vliesstoffmaterial soll einen hohen Strömungswiderstand bzw. eine geringe Luftdurchlässigkeit bei einem geringen Gewicht aufweisen. Darüber hinaus soll das Material nicht brennbar sein, so dass die DIN 53438 K1 erfüllt ist. Ergänzend gilt es, das Vliesstoffmaterial so auszubilden, dass eine hohe Reißfestigkeit in Längs- und Querrichtung besteht und eine hohe Steifigkeit vorhanden ist bei gleichzeitigem Erhalt der notwendigen Flexibilität des entsprechenden bahnförmigen Materials.From the foregoing, it is an object of the invention to provide a nonwoven fabric for acoustic applications with increased sound absorption properties, which achieves a sound absorption coefficient of> 0.6. The nonwoven material should have a high flow resistance or a low air permeability at a low weight. In addition, the material should not be flammable, so that the DIN 53438 K1 is met. In addition, it is necessary to form the nonwoven material so that a high tensile strength in the longitudinal and transverse direction and a high rigidity is present while maintaining the necessary flexibility of the corresponding sheet material.
Die Lösung der Aufgabe der Erfindung erfolgt durch den Vliesstoff gemäß Merkmalskombination nach Patentanspruch 1, durch das Verfahren zur Herstellung eines solchen Vliesstoffmaterials und durch die erfindungsgemäße Verwendung des erfindungsgemäß produzierten Vliesstoffes.The object of the invention is achieved by the nonwoven fabric according to combination of features according to claim 1, by the method for producing such a nonwoven material and by the inventive use of the inventively produced nonwoven fabric.
Es wird demnach von einem Vliesstoff für akustische Anwendungen mit erhöhten Schallabsorptionseigenschaften ausgegangen, wobei der Vliesstoff aus einem längsgerichteten oder kreuzgelegten, insbesondere vorverfestigten Kunststofffasermaterial mit einem Flächenausgangsgewicht von 20g/m2 bis 100g/m2, bevorzugt 30g/m2 bis 80g/m2 besteht.It is therefore assumed that a nonwoven fabric for acoustic applications with increased sound absorption properties, wherein the nonwoven fabric of a longitudinal or cross-laid, in particular preconsolidated plastic fiber material having a basis weight of 20g / m 2 to 100g / m 2 , preferably 30g / m 2 to 80g / m 2 consists.
Bei der Ausrüstung des Vliesstoffes werden als Füllstoff ungeblähte Mikrohohlkörper mit einem Anteil von ca. 0,5 bis 4 Gew.-% eingesetzt. Als Binder kommt ein hochmolekulares Polyestermaterial zum Fixieren der Mikrohohlkörper an den Vliesfasern sowie zur Erhöhung der Steifigkeit und Reißfestigkeit zur Anwendung. Es kann jedoch grundsätzlich jeder übliche Polymerbinder oder Bindermischung auf wässriger Basis, aus Acrylat, Styrolbutatien oder Vinylacetat-Polymeren verwendet werden. Der Vliesstoff wird bei solchen Temperaturen getrocknet, dass es zu einem Expandieren der Mikrohohlkörper kommt, wodurch die Poren des Vlieses verschlossen werden mit der Folge der gewünschten Schallabsorptionseigenschaften.In the finishing of the nonwoven fabric, the filler used is unexpanded hollow microbodies with a proportion of about 0.5 to 4% by weight. The binder used is a high molecular weight polyester material for fixing the hollow microbodies to the nonwoven fibers and for increasing the rigidity and tear resistance. However, in principle, any common aqueous-based polymer binder or binder mixture of acrylate, styrene butadiene or vinyl acetate polymers may be used. The nonwoven fabric is dried at temperatures such that expansion of the micro-hollow bodies occurs, whereby the pores of the nonwoven fabric are sealed, resulting in the desired sound absorption properties.
Erfindungsgemäß kann der Ausrüstung ohne weiteres ein Flammschutzmittel bekannter Art zugegeben werden.According to the invention, a flame retardant of known type can readily be added to the equipment.
Die Mikrohohlkörper bestehen aus thermoplastischen Schalen, gefüllt mit Treibgas. Insbesondere kommen ungeblähte Mikrohohlkörper aus Treibgas mit einer thermoplastischen Schale aus PVC oder Vinylidenchlorid-Acrylnitril-Copolymeren zur Verdichtung des Vlieses und zur Verbesserung der Akustik, sobald die Mikrohohlkörper aufgebläht werden, zum Einsatz.The hollow microbodies consist of thermoplastic shells filled with propellant gas. In particular, unexpanded micro hollow bodies of propellant gas with a thermoplastic shell made of PVC or vinylidene chloride-acrylonitrile copolymers are used to densify the nonwoven fabric and to improve the acoustics as soon as the hollow microbodies are inflated.
Die Trocknung erfolgt erfindungsgemäß bei Temperaturen zwischen 100°C und 200°C, bevorzugt zwischen 140°C und 180°C.The drying is carried out according to the invention at temperatures between 100 ° C and 200 ° C, preferably between 140 ° C and 180 ° C.
Die Auflagemenge der Ausrüstungsrezeptur beträgt etwa 20% bis 50%, insbesondere 30% bis 40% des Vliesgewichts.The amount of finish of the finishing formulation is about 20% to 50%, especially 30% to 40% of the web weight.
Bei dem erfindungsgemäßen Verfahren zur Herstellung des vorstehend erläuterten Vliesstoffes werden der Ausrüstung neben einem Bindemittel, z. B. einem hochmolekularen Polyestermaterial, ungeblähte Mikrohohlkörper zugegeben, wobei über den Anteil der Mikrohohlkörper in der Ausrüstung die bei der späteren Trocknung zu Kugeln expandierenden, diese eine Abdichtung der Vliesporen bewirken.In the method according to the invention for the preparation of the above-described nonwoven fabric of the equipment in addition to a binder, for. As a high molecular weight polyester material, unenclosed micro hollow body added, over the proportion of micro hollow body in the equipment which in the later drying to balls expanding, this effect a sealing of the non-woven pores.
Das derart hergestellte Vliesstoffmaterial kann als Abdeckvlies für Akustik-Deckplatten, zur thermischen Isolierung und Abdichtung oder aber auch als Abdeck- und Akustikvlies im Automobilbau angewendet werden.The nonwoven material produced in this way can be used as a cover fleece for acoustic cover plates, for thermal insulation and sealing or else as cover and acoustic fleece in the automotive industry.
Die Erfindung soll nachstehend anhand eines Ausführungsbeispiels näher erläutert werden.The invention will be explained below with reference to an embodiment.
Das Vliesstoffgrundmaterial ist ein an sich bekanntes Thermovlies oder ein anderweitig, z.B. durch Wasserstrahlverfestigung vorbereitetes Vliesmaterial aus längsgerichteten Fasern, wodurch sich ein gleichmäßiges Vliesbild ergibt. Als Fasern kommen PES, CoPES oder ähnliche Fasermaterialien zum Einsatz. Das Flächengewicht liegt im Bereich von 20g/m2 bis 100g/m2, idealerweise im Bereich zwischen 30g/m2 bis 80g/m2 bei einer Luftdurchlässigkeit von 1500 bis 3000 l/m2×s (200 Pa).The nonwoven base material is a per se known thermal nonwoven or otherwise prepared by, for example, hydroentanglement nonwoven material of longitudinal fibers, resulting in a uniform nonwoven image. The fibers used are PES, CoPES or similar fiber materials. The basis weight is in the range of 20 g / m 2 to 100 g / m 2 , ideally in the range between 30 g / m 2 to 80 g / m 2 with an air permeability of 1500 to 3000 l / m 2 × s (200 Pa).
Die Ausrüstungsrezeptur enthält einen hochmolekularen Polyester-Binder für die notwendige Steifheit und zur Erhöhung der Reißfestigkeit bzw. Dehnung und zur Bindung von erfindungsgemäß zur Anwendung kommenden Mikrohohlkörpern an die Vliesfasern. Als Flammschutzmittel werden z. B. roter Phosphor oder andere handelsübliche Flammschutzmittel eingesetzt.The finishing formulation contains a high molecular weight polyester binder for the necessary stiffness and for increasing the tensile strength or elongation and for bonding micro hollow bodies used according to the invention to the nonwoven fibers. As a flame retardant z. As red phosphorus or other commercially available flame retardants used.
Der Vliesstoff wird durch Beigabe von zunächst ungeblähten Mikrohohlkörpern aus Treibgas mit einer thermoplastischen Schale aus PVC oder Vinylidenchlorid-Acrylnitril-Copolymeren gebildet. Die Mikrohohlkörper dienen der Verdichtung des Vliesmaterials und der gewünschten Verbesserung der Akustik nach thermischer Behandlung und hierdurch bedingtem Aufblähen.The nonwoven fabric is formed by adding initially unexpanded micro hollow bodies of propellant gas with a thermoplastic shell of PVC or vinylidene chloride-acrylonitrile copolymers. The hollow microbodies serve to densify the nonwoven material and to provide the desired improvement in acoustics after thermal treatment and consequent bloat.
Zur weiteren Verarbeitung kann das Abdeckvlies mit thermo- oder duroplastischen Klebern beschichtet werden. Die Beschichtung wird hierbei nicht vollflächig aufgebracht, um die gewünschte akustische Wirkung zu erhalten.For further processing, the cover fleece can be coated with thermosetting or thermosetting adhesives. The coating is not applied over the entire surface in order to obtain the desired acoustic effect.
Die Ausrüstung erfolgt z.B. mit einem Standard-Foulard.The equipment is e.g. with a standard foulard.
Die Trocknung erfolgt bei Temperaturen, die die Mikrohohlkörper zu Kugeln expandieren lassen, um die relativ großen Poren des Vliesmaterials zu verschließen. Die Trocknungstemperaturen liegen im Bereich zwischen 100°C und 200°C, bevorzugt zwischen 140°C und 180°C.The drying takes place at temperatures which allow the hollow microspheres to expand into spheres to close the relatively large pores of the nonwoven material. The drying temperatures are in the range between 100 ° C and 200 ° C, preferably between 140 ° C and 180 ° C.
Durch das Aufblähen und das Verschließen der Poren verbessert sich die Akustik des Vliesmaterials. Gleichzeitig steigt die Dichtigkeit als Abdeckvlies und der sich hierdurch ergebende bessere Rieselschutz.The puffing and closing of the pores improves the acoustics of the nonwoven material. At the same time the tightness as Abdeckvlies and thereby resulting better trickle protection increases.
Die Auflagemenge der gesamten Rezeptur liegt bei 20% bis 50% des Vliesgewichts, bevorzugt bei 30% bis 40% des Vliesgewichts.The total amount of the formulation is 20% to 50% of the web weight, preferably 30% to 40% of the web weight.
Der Anteil der Mikrohohlkörper im Vlies beträgt erfindungsgemäß nur 0,5 Gew.% bis 4 Gew.-%. Durch eine erfindungsgemäße Variation der eingesetzten Menge der Mikrohohlkörper kann die Abdichtung der Vliesporen in einem weiten Bereich beeinflusst werden. Bei der Anwendung als Abdeckvlies in der Automobiltechnik kann der Anteil auf bis zu 20 Gew.-% erhöht werden.The proportion of micro hollow bodies in the nonwoven is according to the invention only 0.5% by weight to 4% by weight. By a variation of the amount of micro hollow body used according to the invention, the sealing of the nonwoven pores can be influenced in a wide range. When used as Abdeckvlies in automotive technology, the proportion can be increased to up to 20 wt .-%.
Es gilt zu beachten, dass die Gesamtmenge die Aufnahmefähigkeit der Faserstruktur nicht überbeansprucht wird, um zu verhindern, dass die Mikrohohlkörper auf der Oberfläche aufliegen und leicht abreibbar sind. Die Menge des zugegebenen Flammschutzmittels richtet sich nach den brandschutzseitigen Anforderungen.It should be noted that the total amount of the capacity of the fiber structure is not overstressed in order to prevent the micro-hollow body rest on the surface and are easily abradable. The amount of added flame retardant depends on the fire protection requirements.
Bei einer weiteren Ausführungsform wird in Weiterbildung der Erfindung eine Beschichtung mit handelsüblichen thermoplastischen oder duroplastischen Klebern vorgenommen, um eine übliche Art der Weiterbehandlung für spezielle Abdeckvliese zu gewährleisten, die mittels Druck- und Temperaturbehandlung auf ein anderes Medium, z. B. Metalldeckenplatten, Glasfasermatten oder Polyurethanschaumgebilde aufkaschiert werden.In a further embodiment of the invention, a coating is made with commercially available thermoplastic or thermosetting adhesives in order to ensure a common type of further treatment for special cover fleece, which by means of pressure and temperature treatment to another medium, eg. As metal ceiling panels, glass fiber mats or polyurethane foam sheets are laminated.
Bei einer erfindungsgemäßen Variante kann das Vlies als längs- oder kreuzgelegtes Bindervlies erzeugt werden. Der üblichen Binderrezeptur werden hier die Mikrohohlkörper direkt zugesetzt. Bei Notwendigkeit werden die Flammschutzmittel ebenfalls der Rezeptur zugegeben. Hierdurch kann ein Ausrüstungsarbeitsgang eingespart werden.In a variant according to the invention, the fleece can be produced as a longitudinal or cross-laid binder fleece. The usual binder recipe here the micro hollow body are added directly. If necessary, the flame retardants are also added to the formulation. As a result, an equipment operation can be saved.
Beide Herstellungsvarianten können einen Kalanderschritt umfassen, um die Optik, d. h. die Oberfläche des Vliesmaterials zu optimieren, indem Unebenheiten beseitigt werden, ohne dass die Dichtigkeit und die gewünschten akustischen Eigenschaften nachteilig beeinflusst sind.Both manufacturing variants may include a calendering step to enhance the optics, i. H. to optimize the surface of the nonwoven material by removing imperfections without adversely affecting the tightness and desired acoustic properties.
Die in der
Claims (7)
bei der Ausrüstung als Füllstoff ungeblähte Mikrohohlkörper mit einem Anteil von ca. 0,5 bis 4 Gew.-% eingesetzt werden, wobei als Binder ein hochmolekulares Polyestermaterial zum Fixieren der Mikrohohlkörper an den Vliesfasern sowie zur Erhöhung der Steifigkeit und der Reißfestigkeit zur Anwendung kommt und eine Trocknung bei solchen Temperaturen erfolgt, die zu einem Expandieren der Mikrohohlkörper führt, um die Poren des Vlieses zu verschließen.Nonwoven fabric for acoustic applications with improved sound absorption properties, consisting of a longitudinal or cross-layered, in particular preconsolidated synthetic fiber material having a basis starting weight of 20 g / m 2 to 100g / m 2, preferably 30g / m 2 to 80g / m 2, characterized in that
used in the equipment as a filler unexpanded micro hollow body in a proportion of about 0.5 to 4 wt .-%, being used as a binder, a high molecular weight polyester material for fixing the micro hollow body to the nonwoven fibers and to increase the rigidity and tear strength is used and a drying takes place at such temperatures, which leads to an expansion of the micro-hollow body in order to close the pores of the nonwoven fabric.
dadurch gekennzeichnet, dass
die Ausrüstung ein Flammschutzmittel umfasst.Nonwoven fabric according to claim 1,
characterized in that
the equipment comprises a flame retardant.
dadurch gekennzeichnet, dass
die Mikrohohlkörper aus thermoplastischen Schalen bestehen, die mit Treibgas gefüllt sind.Nonwoven fabric according to claim 1 or 2,
characterized in that
the micro hollow body consist of thermoplastic shells filled with propellant gas.
dadurch gekennzeichnet, dass
die Trocknung bei Temperaturen zwischen 100°C bis 200°C, bevorzugt zwischen 140°C und 180°C erfolgt.Nonwoven fabric according to one of the preceding claims,
characterized in that
the drying takes place at temperatures between 100 ° C to 200 ° C, preferably between 140 ° C and 180 ° C.
dadurch gekennzeichnet, dass
die Auflagemenge der Ausrüstungsrezeptur (trocken) 20% bis 50%, insbesondere 30% bis 40% des Vliesgewichts beträgt.Nonwoven fabric according to one of the preceding claims,
characterized in that
the amount of dressing of the finishing formulation (dry) is 20% to 50%, especially 30% to 40% of the web weight.
dadurch gekennzeichnet, dass
bei der Ausrüstung mit ungeblähten Mikrohohlkörpern über den Anteil der Mikrohohlkörper in der Ausrüstung die bei der späteren Trocknung zu Kugeln expandierenden Mikrohohlkörper eine Abdichtung der Vliesporen bewirken, wobei der Anteil der Mikrohohlkörper im Vlies zwischen 0,5 Gew.-% und 20 Gew.-% liegt, um eine Überbeanspruchung der Aufnahmefähigkeit der Faserstruktur und ein Aufliegen von Mikrohohlkörpern auf der Oberfläche zu verhindern.A process for producing a nonwoven fabric for acoustic applications with improved sound absorption properties, consisting of a longitudinal or cross-layered, in particular preconsolidated synthetic fiber material having a basis starting weight of 20 g / m 2 to 100g / m 2, preferably 30g / m 2 to 80g / m 2,
characterized in that
in the case of the equipment with unexpanded micro hollow bodies over the proportion of micro hollow bodies in the equipment, the hollow microspheres expanding into spheres during the later drying effect a sealing of the non-woven pores, the proportion of micro hollow bodies in the nonwoven being between 0.5% by weight and 20% by weight is to prevent overuse of the capacity of the fiber structure and a micro-cavities on the surface to prevent.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL11180322T PL2444537T3 (en) | 2010-09-13 | 2011-09-07 | Non-woven fabric for acoustic applications with increased sound absorption characteristics |
Applications Claiming Priority (2)
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DE102010045191 | 2010-09-13 | ||
DE102010047533A DE102010047533A1 (en) | 2010-09-13 | 2010-10-05 | Nonwoven fabric for acoustic applications with increased sound absorption properties |
Publications (2)
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EP2444537A1 true EP2444537A1 (en) | 2012-04-25 |
EP2444537B1 EP2444537B1 (en) | 2013-11-13 |
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EP11180322.7A Active EP2444537B1 (en) | 2010-09-13 | 2011-09-07 | Non-woven fabric for acoustic applications with increased sound absorption characteristics |
Country Status (6)
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EP (1) | EP2444537B1 (en) |
DE (2) | DE202010017776U1 (en) |
DK (1) | DK2444537T3 (en) |
ES (1) | ES2444143T3 (en) |
PL (1) | PL2444537T3 (en) |
PT (1) | PT2444537E (en) |
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DE102016101816A1 (en) * | 2016-02-02 | 2017-08-03 | Claus Schierz | layer material |
DE102016207604A1 (en) | 2016-05-03 | 2017-11-09 | Volkswagen Aktiengesellschaft | Process for producing a fiber composite plastic component |
CN113808562B (en) * | 2021-09-29 | 2024-06-04 | 哈尔滨工程大学 | Three-dimensional chiral acoustic metamaterial with high bearing capacity and low-broadband vibration suppression performance |
Citations (8)
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US3676288A (en) | 1970-05-04 | 1972-07-11 | Kendall & Co | Low-density bonded nonwoven fabrics and process therefor |
GB1427647A (en) * | 1973-07-20 | 1976-03-10 | Firet Bv | Process for producing fibrous fabrics for use in fibre-reinforced plastics |
DE3412660A1 (en) | 1984-04-02 | 1985-10-10 | Günter H. 1000 Berlin Kiss | METHOD FOR THE PRODUCTION OF MOLDED PARTS FROM FIBROUS MATERIAL AND FIBER MAT FOR THE PRODUCTION OF MOLDED PARTS |
JPH0482950A (en) * | 1990-07-19 | 1992-03-16 | Sekisui Chem Co Ltd | Production of lightweight structural material |
JPH04281054A (en) * | 1991-03-08 | 1992-10-06 | Asahi Chem Ind Co Ltd | Nonwoven fabric |
WO2001057301A1 (en) * | 2000-02-03 | 2001-08-09 | Sai Automotive Sal Gmbh | Acoustically effective fibrous material |
DE102005044504A1 (en) | 2005-09-16 | 2007-03-29 | BLüCHER GMBH | Functional textile material loaded with active ingredient-containing microcapsules and its use |
DE102008057058A1 (en) | 2008-11-13 | 2010-05-27 | Eswegee Vliesstoff Gmbh | Manufacturing fabric combining lower density with increased stability, for noise protection or composite reinforcement, treats fleece in bath containing expansible microspheres |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
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AT51904B (en) | 1909-04-30 | 1912-01-25 | Willy Anders | Device to indicate the direction of roads, footpaths and dirt roads. |
NL8500242A (en) * | 1985-01-29 | 1986-08-18 | Firet Bv | METHOD FOR MANUFACTURING A FIBER FLUSH INCLUDING MICROBOLLES. |
JP2939827B2 (en) * | 1990-10-04 | 1999-08-25 | 日本バイリーン株式会社 | Nonwoven fabric interior material and method for producing the same |
US6497787B1 (en) | 2000-04-18 | 2002-12-24 | Owens-Corning Veil Netherlands B.V. | Process of manufacturing a wet-laid veil |
-
2010
- 2010-10-05 DE DE202010017776U patent/DE202010017776U1/en not_active Expired - Lifetime
- 2010-10-05 DE DE102010047533A patent/DE102010047533A1/en not_active Ceased
-
2011
- 2011-09-07 EP EP11180322.7A patent/EP2444537B1/en active Active
- 2011-09-07 PT PT111803227T patent/PT2444537E/en unknown
- 2011-09-07 PL PL11180322T patent/PL2444537T3/en unknown
- 2011-09-07 ES ES11180322.7T patent/ES2444143T3/en active Active
- 2011-09-07 DK DK11180322.7T patent/DK2444537T3/en active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US3676288A (en) | 1970-05-04 | 1972-07-11 | Kendall & Co | Low-density bonded nonwoven fabrics and process therefor |
GB1427647A (en) * | 1973-07-20 | 1976-03-10 | Firet Bv | Process for producing fibrous fabrics for use in fibre-reinforced plastics |
DE3412660A1 (en) | 1984-04-02 | 1985-10-10 | Günter H. 1000 Berlin Kiss | METHOD FOR THE PRODUCTION OF MOLDED PARTS FROM FIBROUS MATERIAL AND FIBER MAT FOR THE PRODUCTION OF MOLDED PARTS |
JPH0482950A (en) * | 1990-07-19 | 1992-03-16 | Sekisui Chem Co Ltd | Production of lightweight structural material |
JPH04281054A (en) * | 1991-03-08 | 1992-10-06 | Asahi Chem Ind Co Ltd | Nonwoven fabric |
WO2001057301A1 (en) * | 2000-02-03 | 2001-08-09 | Sai Automotive Sal Gmbh | Acoustically effective fibrous material |
DE102005044504A1 (en) | 2005-09-16 | 2007-03-29 | BLüCHER GMBH | Functional textile material loaded with active ingredient-containing microcapsules and its use |
DE102008057058A1 (en) | 2008-11-13 | 2010-05-27 | Eswegee Vliesstoff Gmbh | Manufacturing fabric combining lower density with increased stability, for noise protection or composite reinforcement, treats fleece in bath containing expansible microspheres |
Non-Patent Citations (1)
Title |
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DATABASE WPI Derwent World Patents Index; AN 1992-352308, XP002663171, NAKAJIAMA HISASHI: "Production of lightweight structural material" * |
Also Published As
Publication number | Publication date |
---|---|
DK2444537T3 (en) | 2014-01-27 |
PT2444537E (en) | 2014-01-03 |
DE102010047533A1 (en) | 2012-03-15 |
ES2444143T3 (en) | 2014-02-24 |
PL2444537T3 (en) | 2014-04-30 |
DE202010017776U1 (en) | 2012-08-30 |
EP2444537B1 (en) | 2013-11-13 |
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