DE4340562A1 - Mfr. of nonwoven material for use as insulation material - Google Patents

Mfr. of nonwoven material for use as insulation material

Info

Publication number
DE4340562A1
DE4340562A1 DE4340562A DE4340562A DE4340562A1 DE 4340562 A1 DE4340562 A1 DE 4340562A1 DE 4340562 A DE4340562 A DE 4340562A DE 4340562 A DE4340562 A DE 4340562A DE 4340562 A1 DE4340562 A1 DE 4340562A1
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DE
Germany
Prior art keywords
starting
fleece
nonwoven
layer
needled
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.)
Withdrawn
Application number
DE4340562A
Other languages
German (de)
Inventor
Walter Dr Ing Kampen
Andreas Schmid
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.)
DIERIG HOLDING AG
Original Assignee
DIERIG HOLDING AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE4308959A external-priority patent/DE4308959C2/en
Application filed by DIERIG HOLDING AG filed Critical DIERIG HOLDING AG
Priority to DE4340562A priority Critical patent/DE4340562A1/en
Publication of DE4340562A1 publication Critical patent/DE4340562A1/en
Withdrawn legal-status Critical Current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
    • D04H1/44—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
    • D04H1/498—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 entanglement of layered webs
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K17/00—Soil-conditioning materials or soil-stabilising materials
    • C09K17/52—Mulches
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K3/00—Materials not provided for elsewhere
    • C09K3/32—Materials not provided for elsewhere for absorbing liquids to remove pollution, e.g. oil, gasoline, fat
    • 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
    • D04H1/425—Cellulose series
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Soil Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Nonwoven Fabrics (AREA)

Abstract

The process for mfg. a nonwoven material using natural and/or synthetic fibres, e.g. cotton fibres, involves needling a flat raw material web. At least one of the web layers close to the surface is compressed during needling in comparison to the central layer.

Description

Die Erfindung betrifft ein Verfahren zum Herstellen eines Vliesstoffes aus natürlichen und/oder synthetischen Fasern, wie Baumwollfasen oder dergleichen, durch Vernadeln eines im wesentlichen flächigen Ausgangsvlieses, nach Patent . . . (Patentanmeldung P 43 08 959.3-26), ferner einen danach hergestellten Vliesstoff und schließlich dessen Verwendung.The invention relates to a method for producing a Nonwoven fabric made from natural and / or synthetic fibers, such as cotton bevels or the like, by needling an im essential flat starting fleece, according to patent. . . (Patent application P 43 08 959.3-26), further one after produced nonwoven and finally its use.

Gegenstand des Hauptpatentes (Patentanmeldung P 43 08 959.3-26) ist ein Verfahren zum Herstellen eines Vliesstoffes der vorstehend beschriebenen Art, bei dem ein Ausgangsvlies, welches vorzugsweise aus Baumwollfasern oder anderen zellu­ losischen Fasern besteht, vernadelt wird, woraufhin dann insbesondere eine Verwendung als Dämmstoff für Bauzwecke erfolgt. Subject of the main patent (patent application P 43 08 959.3-26) is a process for producing a nonwoven fabric type described above, in which a starting fleece, which is preferably made of cotton fibers or other cells Losian fibers, is needled, whereupon in particular use as insulation for construction purposes he follows.  

Dabei kann nach dem Hauptpatent vorgesehen sein, daß der Vliesstoff oberflächennahe Schichten aufweist, die gegenüber der Zentralschicht des Vliesstoffes verdichtet sind, wodurch die Handhabbarkeit, insbesondere für Bauzwecke, erheblich verbessert wird.It can be provided according to the main patent that the Nonwoven has layers close to the surface that face each other the central layer of the nonwoven are compressed, whereby the manageability, especially for construction purposes, considerable is improved.

Der Erfindung liegt die Aufgabe zugrunde, das Verfahren nach dem Hauptpatent dahingehend weiterzubilden, daß kostengün­ stig und ohne Verwendung von Zusatzmaterialien ein Vlies­ stoff mit die Handhabbarkeit und die Einsatzmöglichkeiten fördernden oberflächennahen verdichteten Schichten erhalten werden kann.The invention is based on the object of the method to further develop the main patent so that it is inexpensive a fleece without the use of additional materials fabric with the manageability and the possible uses promoting condensed layers close to the surface can be.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß mindestens eine der oberflächennahen Schichten des Ausgangs­ vlieses beim Vernadeln im Vergleich zu der zentralen Schicht des Ausgangsvlieses verdichtet wird.According to the invention this object is achieved in that at least one of the near-surface layers of the exit fleece when needling compared to the central layer the starting fleece is compressed.

Dabei kann vorgesehen sein, daß beide oberflächennahen Schichten des Ausgangsvlieses beim Vernadeln im Vergleich zu der zentralen Schicht des Ausgangsvlieses verdichtet werden.It can be provided that both near the surface Layers of the starting fleece when needling compared to the central layer of the original nonwoven.

Ferner schlägt die Erfindung vor, daß die Dicke der verdich­ teten Schicht(en) 2 bis 15% der Gesamtdicke des Ausgangs­ vlieses beträgt.Furthermore, the invention proposes that the thickness of the compression layer (s) 2 to 15% of the total thickness of the exit fleece amounts.

Auch kann erfindungsgemäß vorgesehen sein, daß die Dicke der verdichteten Schicht(en) etwa 5% der Gesamtdicke des Aus­ gangsvlieses beträgt.It can also be provided according to the invention that the thickness of the densified layer (s) about 5% of the total thickness of the out gang fleece is.

Weiterhin sieht die Erfindung vor, daß das Verdichten der oberflächennahen Schicht(en) durch Verwendung von Nadeln unterschiedlicher Länge erfolgt, wobei eine erste Nadel­ gruppe das Ausgangsvlies im wesentlichen vollständig durch­ setzt und eine zweite Nadelgruppe lediglich eine Eindring­ tiefe hat, die der Dicke der zu vernadelnden Oberflächen­ schicht(en) entspricht.Furthermore, the invention provides that the compression of the near-surface layer (s) by using needles of different lengths, with a first needle Group the starting fleece essentially completely sets and a second needle group only one penetration  depth that corresponds to the thickness of the surfaces to be needled layer (s) corresponds.

Ferner ist auch vorgesehen, daß das Ausgangsvlies zunächst von der einen Seite her vernadelt, dann gewendet und anschließend von der anderen Seite her vernadelt wird.Furthermore, it is also provided that the initial nonwoven initially needled from one side, then turned and is then needled from the other side.

Es kann aber auch vorgesehen sein, daß das Ausgangsvlies von beiden Seiten her gleichzeitig vernadelt wird.But it can also be provided that the starting fleece of both sides are needled at the same time.

Dabei kann auch vorgesehen sein, daß das Ausgangsvlies derartig mit einer wäßrigen Borsatzlösung behandelt wird, daß der Gehalt des fertigen Vliesstoffes an Borsalz etwa 2 bis 5 Gew.-% beträgt.It can also be provided that the starting fleece is treated in this way with an aqueous boron solution, that the boron salt content of the finished nonwoven fabric is about 2 is up to 5% by weight.

Die Erfindung betrifft auch einen Vliesstoff mit mindestens einer verdichteten oberflächennahen Schicht, hergestellt nach dem Verfahren nach einem der vorangehenden Ansprüche.The invention also relates to a nonwoven fabric with at least a densified layer near the surface according to the method according to any one of the preceding claims.

Schließlich lehrt die Erfindung auch die Verwendung des so erhaltenen Vliesstoffes als Dämmstoff für Bauzwecke.Finally, the invention also teaches the use of the like obtained nonwoven fabric as insulation for construction purposes.

Der Erfindung liegt die überraschende Erkenntnis zugrunde, daß es gelingt, auf einfache Weise und kostengünstig einen Vliesstoff mit verdichteten oberflächennahen Schichten zu erhalten, in dem nicht separat Oberflächenschichten aus gegenüber der Zentralschicht des Ausgangsvlieses ver­ dichtetem Material mit der Zentralschicht verbunden werden, sondern indem eine gleichsam autogene Verdichtung des Ausgangsvlieses erfolgt. Vorzugsweise kann dies dadurch geschehen, daß für das Vernadeln Nadeln unterschiedlicher Länge verwendet werden, von denen die kürzeren Nadeln lediglich eine Eindringtiefe bezüglich des Vlieses haben, die der Dicke der zu verdichtenden Oberflächenschicht ent­ spricht, während die anderen Nadeln das Ausgangsvlies im wesentlichen vollständig durchsetzen.The invention is based on the surprising finding that it succeeds in a simple and inexpensive way Nonwoven with densified layers close to the surface obtained in which surface layers are not separated ver against the central layer of the original fleece sealed material with the central layer, but by an autogenous compression of the Starting fleece takes place. This can preferably be done happen that for needling different needles Length used, of which the shorter needles only have a depth of penetration with respect to the fleece, the ent of the thickness of the surface layer to be compressed speaks while the other needles in the starting fleece  essentially enforce completely.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachstehenden Beschreibung, in der ein Ausführungsbei­ spiel in einzelnen erläutert ist.Further features and advantages of the invention result from the description below, in which an embodiment game is explained in detail.

Bei einem Ausführungsbeispiel des erfindungsgemäßen Verfah­ rens kann so vorgegangen werden, daß ein lockeres Ausgangs­ vlies aus Zellulosefasern etwa in horizontaler Lage zwischen Walzen leicht verdichtet und dann einer Vernadelungseinrich­ tung zugeführt wird. Die Vernadelungseinrichtung weist von oben das Ausgangsvlies beaufschlagende Nadeln auf, von denen eine erste Gruppe eine derartige Länge hat, daß etwa 5% der Gesamtdicke des Ausgangsvlieses durchsetzt werden können, während die andere Nadelgruppe so lang ist, daß das gesamte Ausgangsvlies durchsetzt wird.In one embodiment of the inventive method rens can be proceeded so that a loose exit fleece made of cellulose fibers in a horizontal position between Rolls slightly compressed and then a needling device tion is fed. The needling device points from needles impinging on the starting fleece, of which a first group has a length such that about 5% of the Total thickness of the starting fleece can be penetrated, while the other group of needles is so long that the entire Output fleece is interspersed.

Durch den so bewirkten Vernadelungsvorgang wird das Aus­ gangsvlies in seiner obenliegenden oberflächennahen Schicht gegenüber der Zentrallage des Vlieses verdichtet. Anschließend wird das Vlies so gewendet, daß die noch nicht verdichtete andere Oberflächenschicht oben zu liegen kommt, woraufhin ein zweiter Vernadelungsvorgang mittels derselben Nadelgruppen oder ähnlich aufgebauten erfolgt. Hierbei wird dann auch die andere Seite des Ausgangsvlieses mit einer oberflächennahen Verdichtungsschicht versehen. Es kann aber auch so vorgegangen werden, daß das Ausgangsvlies gleichzeitig von beiden Seiten her unter Erzeugung beider oberflächennaher Verdichtungsschichten vernadelt wird.The needling process thus brought about is the end gang fleece in its top layer close to the surface compressed relative to the central position of the fleece. Then the fleece is turned so that it is not yet other compacted surface layer comes to lie on top, whereupon a second needling process by means of the same Needle groups or similarly constructed. Here will then the other side of the original fleece with one provide near-surface compaction layer. But it can also be done so that the starting fleece from both sides simultaneously producing both near-surface compaction layers is needled.

Das so hergestellte Vlies eignet sich hervorragend zum Ein­ satz als Dämmstoff für Bauzwecke, wobei die Nachteile be­ kannter Dämmstoffe, wie auf Asbest- oder Mineralfaserbasis, nicht auftreten. Werden Baumwollfasern verwendet, läßt sich die aus Sicherheitsgründen notwendige Schwerentflammbarkeit dadurch gewährleisten, daß das Ausgangsvlies z. B. mit Borsalzlösung behandelt wird, und zwar in einer derartigen Konzentration, daß der Gehalt des fertigen Vliesstoffes an Borsalz etwa 2 bis 5 Gew.-% beträgt.The fleece produced in this way is excellently suited for on set as insulation for construction purposes, the disadvantages be known insulation materials, such as based on asbestos or mineral fibers, do not occur. If cotton fibers are used, the low flammability required for safety reasons  thereby ensure that the starting fleece z. B. with Boron solution is treated, in such a way Concentration that the content of the finished nonwoven Boron salt is about 2 to 5% by weight.

Die in der vorstehenden Beschreibung sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausführungsformen wesent­ lich sein.The in the above description as well as in the claims disclosed features of the invention can be used both individually and also in any combination for the realization of the Invention in its various embodiments essential be.

Claims (10)

1. Verfahren zum Herstellen eines Vliesstoffes aus natür­ lichen und/oder synthetischen Fasern, wie Baumwollfasen oder dergleichen, durch Vernadeln eines im wesentlichen flächigen Ausgangsvlieses, nach Patent . . . (Patentanmeldung P 43 08 959.3-26), dadurch gekennzeichnet, daß mindestens eine der oberflächennahen Schichten des Ausgangsvlieses beim Verna­ deln im Vergleich zu der zentralen Schicht des Ausgangsvlie­ ses verdichtet wird.1. A method for producing a nonwoven fabric from natural and / or synthetic fibers, such as cotton fibers or the like, by needling a substantially flat starting nonwoven, according to the patent. . . (Patent application P 43 08 959.3-26), characterized in that at least one of the near-surface layers of the starting nonwoven is compressed when needling in comparison to the central layer of the starting nonwoven. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß beide oberflächennahen Schichten des Ausgangsvlieses beim Vernadeln im Vergleich zu der zentralen Schicht des Ausgangsvlieses verdichtet werden. 2. The method according to claim 1, characterized in that both near-surface layers of the original fleece at Needling compared to the central layer of the Starting fleece are compressed.   3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Dicke der verdichteten Schicht(en) 2 bis 15% der Gesamtdicke des Ausgangsvlieses beträgt.3. The method according to claim 1 or 2, characterized in that the thickness of the compacted layer (s) is 2 to 15% of Total thickness of the starting fleece is. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Dicke der verdichteten Schicht(en) etwa 5% der Gesamt­ dicke des Ausgangsvlieses beträgt.4. The method according to claim 3, characterized in that the thickness of the compacted layer (s) is about 5% of the total thickness of the starting fleece is. 5. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Verdichten der oberflächennahen Schicht(en) durch Verwendung von Nadeln unterschiedlicher Länge erfolgt, wobei eine erste Nadelgruppe das Ausgangs­ vlies im wesentlichen vollständig durchsetzt und eine zweite Nadelgruppe lediglich eine Eindringtiefe hat, die der Dicke der zu vernadelnden Oberflächenschicht(en) entspricht.5. The method according to any one of the preceding claims, characterized characterized in that the compaction of the near-surface Layer (s) by using different needles Length takes place with a first group of needles starting fleece essentially completely interspersed and a second Needle group only has a depth of penetration that the thickness corresponds to the surface layer (s) to be needled. 6. Verfahren nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Ausgangsvlies zunächst von der einen Seite her vernadelt, dann gewendet und anschließend von der anderen Seite her vernadelt wird.6. The method according to any one of the preceding claims, characterized characterized in that the starting nonwoven initially from one Needled on the side, then turned and then from the other side is needled. 7. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Ausgangsvlies von beiden Seiten her gleichzeitig vernadelt wird.7. The method according to any one of claims 1 to 5, characterized characterized that the starting fleece from both sides is needled at the same time. 8. Verfahren nach einem vorangehenden Ansprüche, dadurch ge­ kennzeichnet, daß das Ausgangsvlies derartig mit einer wäßrigen Borsalzlösung behandelt wird, daß der Gehalt des fertigen Vliesstoffes an Borsalz etwa 2 bis 5 Gew.-% beträgt.8. The method according to any one of the preceding claims, characterized ge indicates that the starting fleece with such a treated aqueous boron solution that the content of finished nonwoven fabric on boron salt about 2 to 5% by weight is. 9. Vliesstoff mit mindestens einer verdickten oberflächen­ nahen Schicht, hergestellt nach dem Verfahren nach einem der vorangehenden Ansprüche. 9. Nonwoven fabric with at least one thickened surface near layer, produced by the method according to one of the preceding claims.   10. Verwendung des Vliesstoffes nach Anspruch 9 als Dämmstoff für Bauzwecke.10. Use of the nonwoven fabric according to claim 9 as Insulation for building.
DE4340562A 1993-03-21 1993-11-29 Mfr. of nonwoven material for use as insulation material Withdrawn DE4340562A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4340562A DE4340562A1 (en) 1993-03-21 1993-11-29 Mfr. of nonwoven material for use as insulation material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4308959A DE4308959C2 (en) 1992-07-09 1993-03-21 Use of a nonwoven made from natural materials
DE4340562A DE4340562A1 (en) 1993-03-21 1993-11-29 Mfr. of nonwoven material for use as insulation material

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DE4340562A1 true DE4340562A1 (en) 1995-06-01

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DE4340562A Withdrawn DE4340562A1 (en) 1993-03-21 1993-11-29 Mfr. of nonwoven material for use as insulation material

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29613233U1 (en) * 1996-07-31 1997-11-27 Faist M Gmbh & Co Kg Insulating mat with natural fibers
WO2014068290A1 (en) * 2012-10-31 2014-05-08 The Wool Packaging Company Limited Multi-layered non-woven insulating textile material

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1660786A1 (en) * 1966-03-23 1970-10-22 Klaus Sievers Needle machine
EP0388062A2 (en) * 1989-03-14 1990-09-19 British United Shoe Machinery Limited Graduated density felt

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1660786A1 (en) * 1966-03-23 1970-10-22 Klaus Sievers Needle machine
EP0388062A2 (en) * 1989-03-14 1990-09-19 British United Shoe Machinery Limited Graduated density felt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29613233U1 (en) * 1996-07-31 1997-11-27 Faist M Gmbh & Co Kg Insulating mat with natural fibers
WO2014068290A1 (en) * 2012-10-31 2014-05-08 The Wool Packaging Company Limited Multi-layered non-woven insulating textile material

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