EP0095527A2 - Upholstered body - Google Patents

Upholstered body Download PDF

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Publication number
EP0095527A2
EP0095527A2 EP82110234A EP82110234A EP0095527A2 EP 0095527 A2 EP0095527 A2 EP 0095527A2 EP 82110234 A EP82110234 A EP 82110234A EP 82110234 A EP82110234 A EP 82110234A EP 0095527 A2 EP0095527 A2 EP 0095527A2
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EP
European Patent Office
Prior art keywords
fibers
network
buffer layer
upholstery
body according
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
EP82110234A
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German (de)
French (fr)
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EP0095527A3 (en
EP0095527B1 (en
Inventor
Holger Burmester
Klaus Dr. Veeser
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Carl Freudenberg KG
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Carl Freudenberg KG
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Publication of EP0095527A2 publication Critical patent/EP0095527A2/en
Publication of EP0095527A3 publication Critical patent/EP0095527A3/en
Application granted granted Critical
Publication of EP0095527B1 publication Critical patent/EP0095527B1/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/12—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with fibrous inlays, e.g. made of wool, of cotton
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/22—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with both fibrous and foamed material inlays
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/02—Seat parts
    • A47C7/24—Upholstered seats
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S297/00—Chairs and seats
    • Y10S297/01—Foam
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/23—Sheet including cover or casing
    • Y10T428/233—Foamed or expanded material encased
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249981—Plural void-containing components
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2904—Staple length fiber
    • Y10T428/2905—Plural and with bonded intersections only
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2904—Staple length fiber
    • Y10T428/2909—Nonlinear [e.g., crimped, coiled, etc.]
    • 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
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913—Rod, strand, filament or fiber
    • Y10T428/2929—Bicomponent, conjugate, composite or collateral fibers or filaments [i.e., coextruded sheath-core or side-by-side type]
    • 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.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/425—Including strand which is of specific structural definition

Definitions

  • the invention relates to a cushion body, in particular a seat cushion for a motor vehicle, consisting of a spring body deformed in the loaded state and thereby permeable to air and moisture as well as an air-permeable covering material stretched thereon which is deposited with a buffer layer having a substantial content of cellulosic fibers.
  • DE-GM 75 03 063 refers to an upholstered body of the type specified above.
  • the spring body consists of a foam block that has through openings and into one more layered coating is encased.
  • the openings serve to improve the air circulation in the foam block and thus to dissipate moisture.
  • This effect is supported by the cover fabric, which has a layer of cellulose fibers and is able to absorb the moisture without saturation. If there is a large amount of moisture, however, this requires a considerable layer thickness and a long drying time between the periods of individual use, because the relative size of the exchange surfaces touching the openings is too small in relation to the surface of the cover fabric and because the openings contained in the openings are renewed Air volume is too slow.
  • Upholstered bodies of this type are therefore only conditionally suitable for long-term use.
  • the invention has for its object to show a cushion body which no longer has such disadvantages and which can be used continuously without the risk of the appearance of wet areas.
  • the spring body consists of fibers with hydrophilic properties and a titer of 3 to 50 dtex, which are combined to form a spatially oriented network and are glued at the crossing points, which when using natural and / or synthetic fibers a thickness of 5 to 20 mm has a density of 10 to 100 kg / m 3 and the basis weight of the buffer layer is 150 to 350 g / m 2 .
  • the spring body of the proposed cushion body has only a very small thickness of approximately 8 to 15 mm.
  • the preferred density is 50 kg / m 3.
  • the spring body consists of relatively coarse fibers with hydrophilic properties, which are combined to form a spatially oriented network and are glued at the crossing points.
  • the result is preferably in Area of greatest load, a local compression of 2 0 to 60% and a corresponding reduction in the volume of the cavity enclosed by the network. This reduction in volume is not constant in normal use, but changes depending on each change in the seat position or when using the cushion body as a seat cushion in a motor vehicle depending on each vehicle vibration initiated. In the network, therefore, a direction of the air flow is constantly reversed between the zones of different loads and parallel to the surface, which touches areas with different levels of moisture.
  • the network consists of fibers with hydrophilic properties, which lie against a buffer layer made of cellulose fibers and which, together with this, form a closed unit with regard to the absorption and desorption behavior.
  • the moisture absorbed by the buffer layer in a partial area is diverted before the occurrence of the saturation state into the fibers of the network and distributed over an exchange surface that is several times larger than the actually loaded surface.
  • the moisture can thus be more easily absorbed by the air flowing through the network and transported to other areas that are less heavily loaded.
  • Moisture is deposited here, preferably in turn in the fibers of the network, discharged into the buffer layer and evaporating over the surface during use. Moisture is no longer to be feared, even with long-term stress in an unchanged sitting position.
  • the basis weight of the buffer layer should be 150 to 350 g / m 2 . If the weight per unit area is lower, then an insufficient distribution of the moisture absorbed in a sub-area over as many fibers of the network as possible can result, but if the weight per unit area is higher, then an unsatisfactory desorption behavior when loaded by an average heavy, sedentary person in the unloaded areas, and in extreme conditions, for example when driving for a long time in summer, a moisture build-up can occur in the area of the polluted zone.
  • the dry feel of the surface can be promoted by applying a layer of hydrophobic fibers to the surface of the buffer layer.
  • This layer must be sufficiently permeable and must not significantly impair the absorption and desorption behavior of the buffer layer.
  • Woven and knitted fabrics, but also velor and terry fabrics with a basis weight of 100 to 500 g / m 2 made of polypropylene and / or polyester fibers have proven themselves, whereby any customary upholstery material can be used if the aforementioned requirements are met.
  • the usage properties of the proposed upholstery body depend to a large extent on a constant elasticity of the network.
  • the use of synthetically produced fibers made of hydrophobic materials is preferred, which have a surface coating made of a hydrophilic material.
  • Cross section of the coating made of a hydrophilic material is available. This cross-section is, however, quite sufficient in view of the large number of fibers combined in the network and in view of the fact that the possibility of moisture exchange both with regard to. is limited to the buffer layer as well as with regard to the air flowing past on the surface of the fibers.
  • practically the entire underside of the buffer layer and, in addition, the entire surface of each individual fiber of the spring body are available for the moisture exchange between the flowing air and the buffer layer.
  • the fibers can consist of metal and / or plastic. Corrosion-resistant materials are preferred for metals, in particular brass and corresponding steel grades. Of the plastics, those with low water absorption capacity are preferred, in particular polypropylene and polyester.
  • crimped fibers are preferably used.
  • the number of crimps per centimeter is 5 to 40.
  • the fibers are permanently glued to one another, so that there is no fear of the binding sites breaking up during use.
  • Chemically crosslinked binders are preferably used, for example based on rubber or synthetic resin.
  • the network within which the fibers are glued to one another can be a knitted fabric made of at least one endless thread.
  • the network consists of fibers combined according to a nonwoven technology, on the other hand, have the advantage of better fiber separation and, accordingly, a frequently improved moisture exchange.
  • the spring body 1 is connected to the top of the foam body 4. This consists of a mixture of the fibers defined below:
  • the binder deposited as a continuous layer on the surface of the fibers of the nonwoven and, after drying and subsequent crosslinking, caused them to bond to one another at the crossing points.
  • the proportion by weight of binder is 70%, the thickness of the spring body is 15 mm and the basis weight is 600 g / m.
  • a buffer layer made of a fleece obtained by wet means is arranged on the top of the spring body.
  • the fiber mixture consists of a mixture of the following fibers:
  • this binder After drying and subsequent crosslinking, this binder causes the fibers to bond to one another.
  • the proportion by weight of the binder in the buffer layer is 20%. With a weight per unit area of 250 g / m 2, it has a thickness of 1.5 mm.
  • the cover fabric 2 consists of a highly air-permeable knitted fabric made of polyamide fibers. This has a basis weight of 400g / m. It is cut and sewn in such a way that the unit consisting of foam body, spring body and buffer layer is enclosed on all sides.

Abstract

Polsterkörper, insbesondere Sitzpolster für ein Kraftfahrzeug, bestehend aus einem im belasteten Zustand deformierten und dabei luft- und feuchtigketsdurchlässigen Federkörper sowie einem darauf aufgespannten, luftdurchlässigen Bezugsstoff, der mit einer einen wesentlichen Gehalt cellulosischer Fasern aufweisenden Pufferschicht hinterlegt ist, wobei der Federkörper (1) aus Fasern mit hydrophilen Eigenschaften und einem Titer von 3 bis 50 dtex besteht, die zu einem räumlich orientierten Netzwerk vereint und an den Kreuzungspunkten verklebt sind, welches bei Verwendung von natürlichen und/oder synthetischen Fasern bei einer Dicke von 5 bis 20 mm ein Raumgewicht von 10 bis 100 kg/m³ aufweist, und daß das Flächengewicht der Pufferschicht (3) 150 bis 350 g/m² beträgt.Upholstery body, in particular seat upholstery for a motor vehicle, consisting of a spring body deformed in the loaded state and thereby permeable to air and moisture, as well as an air-permeable cover material stretched thereon, which is deposited with a buffer layer having a substantial content of cellulosic fibers, the spring body (1) being made of Fibers with hydrophilic properties and a titer of 3 to 50 dtex exist, which are combined to form a spatially oriented network and are glued at the crossing points, which, when using natural and / or synthetic fibers with a thickness of 5 to 20 mm, has a density of 10 up to 100 kg / m³, and that the basis weight of the buffer layer (3) is 150 to 350 g / m².

Description

Die Erfindung betrifft einen Polsterkörper, insbesondere ein Sitzpolster für ein Kraftfahrzeug, bestehend aus einem im belasteten Zustand deformierten-und dabei luft- und feuchtigkeitsdurchlässigen Federkörper sowie einem darauf aufgespannten, luftdurchlässigen Bezugsstoff, der mit einer einen wesentlichen Gehalt cellulosischer Fasern aufweisenden Pufferschicht hinterlegt ist.The invention relates to a cushion body, in particular a seat cushion for a motor vehicle, consisting of a spring body deformed in the loaded state and thereby permeable to air and moisture as well as an air-permeable covering material stretched thereon which is deposited with a buffer layer having a substantial content of cellulosic fibers.

Auf einen Polsterkörper der vorstehend angegebenen Art nimmt DE-GM 75 03 063 Bezug. Der Federkörper besteht dabei aus einem Schaumstoffblock, der durchgehende öffnungen aufweist und in einen mehrlagigen überzug eingehüllt ist. Die Öffnungen dienen der Verbesserung der Luftzirkulation in dem Schaumstoffblock und damit der Ableitung von Feuchtigkeit. Sie werden in dieser Wirkung unterstützt durch den eine Schicht aus Cellulosefasern aufweisenden Bezugsstoff, der die anfallende Feuchtigkeit ohne Sättigung aufzunehmen vermag. Bei großem Feuchtigkeitsanfall ist hierfür allerdings eine erhebliche Schichtdicke erforderlich und eine lange Trocknungszeit zwischen den Zeiträumen der einzelnen Benutzungen, weil die relative Größe der die Öffnungen berührenden Austauschflächen zu gering ist, bezogen auf die Fläche des Bezugsstoffes, und weil die Erneuerung des in den öffnungen enthaltenen Luftvolumens zu langsam erfolgt. Polsterkörper dieser Art sind deshalb nur bedingt für eine länger andauernde Benutzung geeignet.DE-GM 75 03 063 refers to an upholstered body of the type specified above. The spring body consists of a foam block that has through openings and into one more layered coating is encased. The openings serve to improve the air circulation in the foam block and thus to dissipate moisture. This effect is supported by the cover fabric, which has a layer of cellulose fibers and is able to absorb the moisture without saturation. If there is a large amount of moisture, however, this requires a considerable layer thickness and a long drying time between the periods of individual use, because the relative size of the exchange surfaces touching the openings is too small in relation to the surface of the cover fabric and because the openings contained in the openings are renewed Air volume is too slow. Upholstered bodies of this type are therefore only conditionally suitable for long-term use.

Der Erfindung liegt die Aufgabe zugrunde, einen Polsterkörper zu zeigen, der derartige Nachteile nicht mehr aufweist und der ohne die Gefahr des Auftretens sich naß anfühlender Teilbereiche ununterbrochen benutzt werden kann.The invention has for its object to show a cushion body which no longer has such disadvantages and which can be used continuously without the risk of the appearance of wet areas.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Federkörper aus Fasern mit hydrophilen Eigenschaften und einem Titer von 3 bis 50 dtex besteht, die zu einem räumlich orientierten Netzwerk vereint und an den Kreuzungspunkten verklebt sind, welches bei Verwendung von natürlichen und/oder synthetischen Fasern bei einer Dicke von 5 bis 20 mm ein Raumgewicht von 10 bis.100 kg/m3 aufweist und wobei das Flächengewicht der Pufferschicht 150 bis 350 g/m2 beträgt.This object is achieved in that the spring body consists of fibers with hydrophilic properties and a titer of 3 to 50 dtex, which are combined to form a spatially oriented network and are glued at the crossing points, which when using natural and / or synthetic fibers a thickness of 5 to 20 mm has a density of 10 to 100 kg / m 3 and the basis weight of the buffer layer is 150 to 350 g / m 2 .

Der Federkörper des vorgeschlagenen Polsterkörpers hat nur eine sehr geringe Dicke von etwa 8 bis 15 mm. Bei Verwendung natürlicher und/oder synthetischer Fäden zu seiner Herstellung, beträgt das bevorzugte Raumgewicht 50 kg/m3. Der Federkörper besteht aus relativ groben Fasern mit hydrophilen Eigenschaften, die zu einem räumlich orientierten Netzwerk vereint und an den Kreuzungspunkten verklebt sind. Im benutzten Zustand ergibt sich vorzugsweise im Bereich der größten Belastung eine örtliche Zusammenpressung um 20 bis 60 % und eine dementsprechende Verminderung des von dem Netzwerk umschlossenen Hohlraumvolumens. Diese Volumenverminderung ist bei normaler Benutzung nicht konstant, sondern wechselt in Abhängigkeit von jeder Veränderung der Sitzposition bzw. bei Verwendung des Polsterkörpers als Sitzpolster in einem Kraftfahrzeug in Abhängigkeit von jeder eingeleiteten Fahrzeugschwingung. In dem Netzwerk bildet sich deshalb zwischen den Zonen unterschiedlicher Belastung und parallel zur Oberfläche eine die Richtung ständig umkehrende Luftströmung aus, die unterschiedlich stark mit Feuchtigkeit beaufschlagte Bereiche berührt.The spring body of the proposed cushion body has only a very small thickness of approximately 8 to 15 mm. When using natural and / or synthetic threads for its production, the preferred density is 50 kg / m 3. The spring body consists of relatively coarse fibers with hydrophilic properties, which are combined to form a spatially oriented network and are glued at the crossing points. When used, the result is preferably in Area of greatest load, a local compression of 2 0 to 60% and a corresponding reduction in the volume of the cavity enclosed by the network. This reduction in volume is not constant in normal use, but changes depending on each change in the seat position or when using the cushion body as a seat cushion in a motor vehicle depending on each vehicle vibration initiated. In the network, therefore, a direction of the air flow is constantly reversed between the zones of different loads and parallel to the surface, which touches areas with different levels of moisture.

Das Netzwerk besteht aus Fasern mit hydrophilen Eigenschaften, die an einer Pufferschicht aus Cellulosefasern anliegen und die mit dieser zusammen hinsichtlich des Absorptions- und Desorptionsverhaltens eine geschlossene Einheit bilden. Die von der Pufferschicht in einem Teilbereich aufgenommene Feuchtigkeit wird dadurch vor.Eintreten des Sättigungszustandes in die Fasern des Netzwerkes abgeleitet und dabei auf eine Austauschfläche verteilt, die um ein mehrfaches größer ist als die eigentlich belastete Fläche. Die Feuchtigkeit kann dadurch leichter von der das Netzwerk durchströmenden Luft aufgenommen und in andere Bereiche transportiert werden, die weniger stark belastet sind. Hier kommt es zum Niederschlag der Feuchtigkeit, bevorzugt wiederum in den Fasern des Netzwerkes, zur Ableitung in die Pufferschicht und zur Verdunstung über die Oberfläche schon während der Benutzung. Ein Feuchtigkeitsstau ist, auch bei einer langanhaltenden Belastung in unveränderter Sitzhaltung, nicht mehr zu befürchten.The network consists of fibers with hydrophilic properties, which lie against a buffer layer made of cellulose fibers and which, together with this, form a closed unit with regard to the absorption and desorption behavior. As a result, the moisture absorbed by the buffer layer in a partial area is diverted before the occurrence of the saturation state into the fibers of the network and distributed over an exchange surface that is several times larger than the actually loaded surface. The moisture can thus be more easily absorbed by the air flowing through the network and transported to other areas that are less heavily loaded. Moisture is deposited here, preferably in turn in the fibers of the network, discharged into the buffer layer and evaporating over the surface during use. Moisture is no longer to be feared, even with long-term stress in an unchanged sitting position.

Das Flächengewicht der Pufferschicht soll 150 bis 350 g/m2 betragen. Liegt das Flächengewicht niedriger, dann kann eine unzureichende Verteilung der in einem Teilbereich aufgenommenen Feuchtigkeit auf möglichst viele Fasern des Netzwerkes die Folge sein, liegt das Flächengewicht hingegen höher, dann ist ein unbefriedigendes Desorptionsverhalten bei Belastung durch eine durchschnittlich schwere, sitzende Person in den nicht belasteten Bereichen die Folge, und es kann bei extremen Bedingungen, beispielsweise bei längerer Autofahrt im Sommer, zu einem Feuchtigkeitsstau im Bereich der belasteten Zone kommen.The basis weight of the buffer layer should be 150 to 350 g / m 2 . If the weight per unit area is lower, then an insufficient distribution of the moisture absorbed in a sub-area over as many fibers of the network as possible can result, but if the weight per unit area is higher, then an unsatisfactory desorption behavior when loaded by an average heavy, sedentary person in the unloaded areas, and in extreme conditions, for example when driving for a long time in summer, a moisture build-up can occur in the area of the polluted zone.

Der trockene Griff der Oberfläche läßt sich begünstigen durch Aufbringung einer Schicht aus hydrophoben Fasern auf die Oberfläche der Pufferschicht. Diese Schicht muß ausreichend durchlässig sein und darf das Absorptions- und das Desorptionsverhalten der Pufferschicht in einem nennenswerten Maße nicht beeinträchtigen. Gewebe und Gewirke, jedoch auch Velour- und Frotteestoffe mit einem Flächengewicht von 100 bis 500 g/m2 aus Polypropylen und/oder Polyesterfasern haben sich bewährt, wobei jeder übliche Polsterstoff verwandt werden kann, falls die vorgenannten Anforderungen erfüllt werden.The dry feel of the surface can be promoted by applying a layer of hydrophobic fibers to the surface of the buffer layer. This layer must be sufficiently permeable and must not significantly impair the absorption and desorption behavior of the buffer layer. Woven and knitted fabrics, but also velor and terry fabrics with a basis weight of 100 to 500 g / m 2 made of polypropylene and / or polyester fibers have proven themselves, whereby any customary upholstery material can be used if the aforementioned requirements are met.

Die Gebrauchseigenschaften des vorgeschlagenen Polsterkörpers sind maßgeblich von einer gleichbleibenden Elastizität des Netzwerkes abhängig. Neben grobtitrigen Naturfasern, die ohne weiteres verwendet werden können, wird deshalb die Verwendung von synthetisch hergestellten Fasern aus hydrophoben Werkstoffen bevorzugt, die eine Oberflächenbeschichtung aus einem hydrophilen Werkstoff aufweisen Für den Transport.der Feuchtigkeit aus bzw. in die Pufferschicht steht in diesem Falle nur der Querschnitt der Beschichtung aus einem hydrophilen Werkstoff zur Verfügung. Dieser Querschnitt ist jedoch durchaus ausreichend im Hinblick auf die,Vielzahl der in dem Netzwerk vereinten Fasern sowie im Hinblick auf die Tatsache, daß die Möglichkeit eines Feuchtigkeitsaustauschs sowohl im Hinblick. auf die Pufferschicht als auch im Hinblick auf die vorbeiströmende Luft auf die Oberfläche der Fasern beschränkt ist. Für den Feuchtigkeitsaustausch zwischen der strömenden Luft und der Pufferschicht steht somit im Gegensatz zu einer Ausführung der eingangs genannten Art praktisch die gesamte Unterseite der Pufferschicht zur Verfügung und zusätzlich die gesamte Oberfläche jeder einzelnen Faser des Federkörpers.The usage properties of the proposed upholstery body depend to a large extent on a constant elasticity of the network. In addition to coarse-titer natural fibers, which can be used without any problems, the use of synthetically produced fibers made of hydrophobic materials is preferred, which have a surface coating made of a hydrophilic material. In this case, only the transport of moisture from or into the buffer layer is available Cross section of the coating made of a hydrophilic material is available. This cross-section is, however, quite sufficient in view of the large number of fibers combined in the network and in view of the fact that the possibility of moisture exchange both with regard to. is limited to the buffer layer as well as with regard to the air flowing past on the surface of the fibers. In contrast to an embodiment of the type mentioned at the outset, practically the entire underside of the buffer layer and, in addition, the entire surface of each individual fiber of the spring body are available for the moisture exchange between the flowing air and the buffer layer.

Die Fasern können aus Metall und/oder aus Kunststoff bestehen. Bei den Metallen werden korrisionsfeste Werkstoffe bevorzugt, insbesondere Messing und entsprechende Stahlqualitäten. Von den Kunststoffen werden solche mit geringer Wasseraufnahmefähigkeit bevorzugt, insbesondere Polypropylen und Polyester.The fibers can consist of metal and / or plastic. Corrosion-resistant materials are preferred for metals, in particular brass and corresponding steel grades. Of the plastics, those with low water absorption capacity are preferred, in particular polypropylene and polyester.

Zur Erzielung einer offenen Struktur und einer guten Federelastizität des Netzwerkes kommen bevorzugt gekräuselte Fasern zur Anwendung. Die Anzahl der Kräuselbögen je Zentimeter beträgt 5 bis 40.To achieve an open structure and good spring elasticity of the network, crimped fibers are preferably used. The number of crimps per centimeter is 5 to 40.

Die Fasern sind dauerhaft untereinander verklebt, so daß während des Gebrauches eine Auflösung der Bindestellen nicht zu befürchten ist. Bevorzugt kommen chemisch vernetzte Bindemittel zur Anwendung, beispielsweise auf Kautschuk- oder auf Kunstharzbasis.The fibers are permanently glued to one another, so that there is no fear of the binding sites breaking up during use. Chemically crosslinked binders are preferably used, for example based on rubber or synthetic resin.

Das Netzwerk, innerhalb dessen die Fasern untereinander verklebt sind, kann ein Gewirke aus wenigstens einem endlosen Faden sein. Je nach Festlegung und gegenseitiger Zuordnung der einzelnen Maschen ergibt sich in diesem Falle eine Kanalisierung der das Netzwerk während des Gebrauchs durchströmender Luft und auf diese Weise ein besonders günstiger Ventilationseffekt. Ausführungen, bei denen das Netzwerk aus nach einer Vliestechnologie vereinten Fasern besteht, haben demgegenüber den Vorteil einer besseren Faserseparierung und dementsprechend eines häufig noch weiter verbesserten Feuchtigkeitsaustausches.The network within which the fibers are glued to one another can be a knitted fabric made of at least one endless thread. Depending on the definition and mutual assignment of the individual meshes, in this case there is a channeling of the air flowing through the network during use and in this way a particularly favorable ventilation effect. Versions in which the network consists of fibers combined according to a nonwoven technology, on the other hand, have the advantage of better fiber separation and, accordingly, a frequently improved moisture exchange.

Der Gegenstand der vorliegenden Erfindung wird nachfolgend anhand der in der Anlage beigefügten Zeichnung am Beispiel eines Autositzes weiter verdeutlicht:

  • Die Gestalt des Autositzes wird im"wesentlichen durch die Form des Schaumstoffkörpers 4 bestimmt, der im wesentlichen luftundurchlässig ist und aus einem Polyurethanweichschaum mit einem Raumgewicht von 35 kg/m besteht.
The subject matter of the present invention is further clarified below with reference to the attached drawing using the example of a car seat:
  • The shape of the car seat is essentially determined by the shape of the foam body 4, which is essentially impermeable to air and consists of a flexible polyurethane foam with a density of 35 kg / m.

Mit der Oberseite des Schaumstoffkorpers 4 ist der Federkörper 1 verbunden. Dieser besteht aus einem Gemisch aus den nachfolgend näher definierten Fasern:

Figure imgb0001
The spring body 1 is connected to the top of the foam body 4. This consists of a mixture of the fibers defined below:
Figure imgb0001

Die Fasern wurden instensiv durchmischt, regellos zur Ablage gebracht und durch eine Nadelung innerhalb des erhaltenen Vlieses weiter verdichtet. Nachfolgend wurde eine Imprägnierung mit einem hydrophilen Bindemittel der folgenden Zusammensetzung vorgenommen:

  • Es wird eine Mischung hergestellt aus: ..
    • 1. einer wässrigen Dispersion eines Copolymerisats auf Basis Butadien/Acrylnitril mit selbstvernetzenden Gruppen,
    • 2. einer Lewissäure, z. B. Ammoniumchlorid als Katalysator für die Vernetzungsreaktion und
    • 3. aus Zusätzen von Emulgatoren, um die Hydrophilie des Bindemittelfilms zu steigern, z. B. Polyäthylenoxidsiloxan.
The fibers were mixed thoroughly, randomly put down and further compressed by needling within the fleece obtained. Impregnation was then carried out with a hydrophilic binder of the following composition:
  • A mixture is made of: ..
    • 1. an aqueous dispersion of a copolymer based on butadiene / acrylonitrile with self-crosslinking groups,
    • 2. a Lewis acid, e.g. B. ammonium chloride as a catalyst for the crosslinking reaction and
    • 3. from the addition of emulsifiers to increase the hydrophilicity of the binder film, for. B. polyethylene oxide siloxane.

Das Bindemittel lagerte sich als durchgehende Schicht auf der Oberfläche der Fasern des Vlieses ab und bewirkte nach der Trocknung und anschließenden Vernetzung deren gegenseitige Verklebung an den Kreuzungspunkten. Der Gewichtsanteil an Bindemittel beträgt 70 %, die Dicke des Federkörpers 15 mm bei einem Flächengewicht von 600g/m .The binder deposited as a continuous layer on the surface of the fibers of the nonwoven and, after drying and subsequent crosslinking, caused them to bond to one another at the crossing points. The proportion by weight of binder is 70%, the thickness of the spring body is 15 mm and the basis weight is 600 g / m.

Auf der Oberseite des Federkörpers ist eine Pufferschicht aus einem auf nassem Wege erhaltenen Vlies angeordnet. Die Fasermischung besteht aus einem Gemisch folgender Fasern:

Figure imgb0002
A buffer layer made of a fleece obtained by wet means is arranged on the top of the spring body. The fiber mixture consists of a mixture of the following fibers:
Figure imgb0002

Das daraus hergestellte Faservlies wird mit einem Bindemittel verfestigt, das folgendermaßen zusammengesetzt ist:

  • Es wird eine Mischung hergestellt aus:
    • 1. einer wässrigen Dispersion eines Copolymerisats auf Basis von Butadien/Acrylnitril mit selbstvernetzenden Gruppen
    • 2. einer Lewissäure, z. B. Ammoniumchlorid und
    • 3. Emulgatoren, z. B. Polyäthylenoxidsiloxan
The nonwoven fabric produced from this is consolidated with a binder, which is composed as follows:
  • A mixture is made from:
    • 1. an aqueous dispersion of a copolymer based on butadiene / acrylonitrile with self-crosslinking groups
    • 2. a Lewis acid, e.g. B. ammonium chloride and
    • 3. Emulsifiers, e.g. B. polyethylene oxide siloxane

Dieses Bindemittel bewirkt nach der Trocknung und anschließenden Vernetzung die gegenseitige Verklebung der Fasern. Der Gewichtsanteil des Bindemittels an der Pufferschicht beträgt 20 %. Sie weist bei einem Flächengewicht von 250 g/m2 eine Dicke von 1,5 mm auf.After drying and subsequent crosslinking, this binder causes the fibers to bond to one another. The proportion by weight of the binder in the buffer layer is 20%. With a weight per unit area of 250 g / m 2, it has a thickness of 1.5 mm.

Der Bezugsstoff 2 besteht aus einem hochgradig luftdurchlässigen Gewirke aus Polyamidfasern. Dieses hat ein Flächengewicht von 400g/m . Es ist derart zugeschnitten und in sich vernäht, daß die aus Schaumstoffkörper, Federkörper und Pufferschicht bestehende Einheit allseitig umschlossen wird.The cover fabric 2 consists of a highly air-permeable knitted fabric made of polyamide fibers. This has a basis weight of 400g / m. It is cut and sewn in such a way that the unit consisting of foam body, spring body and buffer layer is enclosed on all sides.

Claims (8)

1. Polsterkörper, insbesondere Sitzpolster für ein Kraftfahrzeug, bestehend aus einem im belastetep Zustand deformierten und dabei luft- und feuchtigkeitsdurchlässigen Federkörper sowie einem darauf aufgespannten, luftdurchlässigen Bezugsstoff, der mit einer einen wesentlichen Gehalt cellulosischer Fasern aufweisenden Pufferschicht hinterlegt ist, dadurch gekennzeichnet, daß der Federkörper (1) aus Fasern mit hydrophilen Eigenschaften und einem Titer von 3 bis 50 dtex besteht, die zu einem räumlich orientierten Netzwerk vereint und an den Kreuzungspunkten verklebt sind, welches bei Verwendung von natürlichen und/oder synthetischen Fasern bei einer Dicke von 5 bis 20 mm ein Raumgewicht von 10 bis 100 kg/m3 aufweist, und daß das Flächengewicht der Pufferschicht (3) 150 bis 350 g/m2 beträgt.1. cushion body, in particular seat cushion for a motor vehicle, consisting of a spring body deformed in the loaded p state and thereby permeable to air and moisture as well as an air-permeable covering material stretched thereon, which is deposited with a buffer layer having a substantial content of cellulosic fibers, characterized in that the spring body (1) consists of fibers with hydrophilic properties and a titer of 3 to 50 dtex, which are combined to form a spatially oriented network and are glued at the crossing points, which, when using natural and / or synthetic fibers, have a thickness of 5 to 20 mm has a density of 10 to 100 kg / m 3 , and that the basis weight of the buffer layer (3) is 150 to 350 g / m 2 . 2. Polsterkörper nach Anspruch 1, dadurch gekennzeichnet, daß die Fasern des Netzwerkes aus einem hydrophoben Werkstoff bestehen und oberflächlich mit einem hydrophilen Werkstoff beschichtet sind.2. Upholstery body according to claim 1, characterized in that the fibers of the network consist of a hydrophobic material and are coated on the surface with a hydrophilic material. 3. Polsterkörper..nach Anspruch 2, dadurch gekennzeichnet, daß die Fasern des Netzwerkes aus Metall und/oder Kunststoff bestehen.3. Upholstered body .. according to claim 2, characterized in that the fibers of the network consist of metal and / or plastic. 4. Polsterkörper nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß die Fasern des Netzwerkes gekräuselt sind.4. Upholstery body according to claim 1 to 3, characterized in that the fibers of the network are crimped. 5. Polsterkörper nach Anspruch 4, dadurch gekennzeichnet, daß die Kräuselung der Fasern des Netzwerkes durch 5 bis 40 Bögen je Zentimeter definiert ist.5. Upholstery body according to claim 4, characterized in that the crimping of the fibers of the network is defined by 5 to 40 sheets per centimeter. 6. Polsterkörper nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Fasern des Netzwerkes durch ein vernetztes Bindemittel verklebt sind.6. Upholstery body according to claim 1 to 5, characterized in that the fibers of the network are glued by a crosslinked binder. 7. Polsterkörper nach Anspruch 1 bis 6, dadurch gekennzeichnet, daß das Netzwerk aus einem Gewirk besteht.7. Upholstered body according to claim 1 to 6, characterized in that the network consists of a knitted fabric. 8. Polsterkörper nach Anspruch 1 bis 6 dadurch gekennzeichnet, daß das Netzwerk aus nach einer Vliestechnologie vereinten Fasern besteht.8. Upholstery body according to claim 1 to 6, characterized in that the network consists of fibers combined according to a nonwoven technology.
EP82110234A 1982-05-28 1982-11-06 Upholstered body Expired EP0095527B1 (en)

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DE3220088 1982-05-28
DE3220088A DE3220088C1 (en) 1982-05-28 1982-05-28 Upholstered body

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EP0095527A2 true EP0095527A2 (en) 1983-12-07
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JP (1) JPS58216012A (en)
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DE3271445D1 (en) 1986-07-03
ES269966Y (en) 1984-01-16
EP0095527A3 (en) 1984-11-28
US4486493A (en) 1984-12-04
BR8300837A (en) 1984-04-17
DE3220088C1 (en) 1983-09-29
MX161450A (en) 1990-09-27
EP0095527B1 (en) 1986-05-28
ES269966U (en) 1983-07-01
JPS58216012A (en) 1983-12-15

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