DE19505337A1 - Rapid polymeric decomposition of polyamide-polyurethane fibre materials, used as moulding material - Google Patents

Rapid polymeric decomposition of polyamide-polyurethane fibre materials, used as moulding material

Info

Publication number
DE19505337A1
DE19505337A1 DE1995105337 DE19505337A DE19505337A1 DE 19505337 A1 DE19505337 A1 DE 19505337A1 DE 1995105337 DE1995105337 DE 1995105337 DE 19505337 A DE19505337 A DE 19505337A DE 19505337 A1 DE19505337 A1 DE 19505337A1
Authority
DE
Germany
Prior art keywords
polyamide
polyurethane
degrees celsius
fibre materials
rapid
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.)
Ceased
Application number
DE1995105337
Other languages
German (de)
Inventor
Dieter Dr Rer Nat Dornig
Heinz Prof Dr Ing Pecina
Gerhard Prof Dr Ing Kuehne
Karlheinz Haustein
Heidrun Sehm
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.)
AUERBACHER ING HANDEL
Original Assignee
AUERBACHER ING HANDEL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AUERBACHER ING HANDEL filed Critical AUERBACHER ING HANDEL
Priority to DE1995105337 priority Critical patent/DE19505337A1/en
Publication of DE19505337A1 publication Critical patent/DE19505337A1/en
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J11/00—Recovery or working-up of waste materials
    • C08J11/04—Recovery or working-up of waste materials of polymers
    • C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
    • C08J11/16—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
    • D06M11/64—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with nitrogen oxides; with oxyacids of nitrogen or their salts
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/58—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides
    • D06M11/64—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with nitrogen or compounds thereof, e.g. with nitrides with nitrogen oxides; with oxyacids of nitrogen or their salts
    • D06M11/65—Salts of oxyacids of nitrogen
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/12—Polyester-amides
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/62—Plastics recycling; Rubber recycling

Landscapes

  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
  • Processing Of Solid Wastes (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)

Abstract

Process for rapid polymeric decomposition of polyamide-polyurethane fibre materials, their homologues and mixts. with other fibre materials, comprises thermally treating the material, consisting wholly or partially of polyamide and polyurethane, with NO2 in the gas phase at 110-140 deg C for 1-15 mins.

Description

Verfahren zur Herstelllung von Platten und Formteilen mittlerer und hoher Dichte im diskontinuierlichen oder kontinuierlichen Verfahren aus vollständig oder überwiegend chemisch modifizierten Polyamid-Polyurethan-Sekundärtextilien allein oder in Mischung mit lignocellulosen Fasern.Process for the production of medium-sized sheets and moldings and high density in discontinuous or continuous Process from completely or predominantly chemical modified polyamide-polyurethane secondary textiles alone or in a mixture with lignocellulosic fibers.

Anwendungsgebiet der ErfindungField of application of the invention

Das Anwendungsgebiet ist die Herstellung von Werkstoffen aus vollständig oder überwiegend chemisch modifizierten Polyamid- Polyurethan-Faserstoffen allein oder in Mischung mit ligno­ cellulosen Fasern.The area of application is the manufacture of materials completely or predominantly chemically modified polyamide Polyurethane fibers alone or in a mixture with ligno cellulosic fibers.

Ziel der ErfindungAim of the invention

Das Ziel der Erfindung besteht darin, durch ein polymeres Abbauverfahren, vorrangig für Polyamid-Polyurethan- Faserstoffe, Platten und Formteile aus Textilresten ohne zusätzliches synthetisches Bindemittel allein oder in Mischung mit lignocellulosen Fasern im Heißpreßverfahren bei gegenüber herkömmlichen Verfahren erniedrigten Tempe­ raturen herzustellen. The aim of the invention is through a polymer Mining process, primarily for polyamide-polyurethane Fibers, sheets and molded parts from textile residues without additional synthetic binder alone or in Mixing with lignocellulosic fibers in the hot pressing process at low temperatures compared to conventional processes to manufacture fittings.  

In der Hauptpatentschrift P 43 28 195.8 wurde auf der Seite 6 vermerkt, daß der Degradationsmechanismus des Magnesium­ nitrates auf das Polyamid-Polyurethan-Fasergemisch vor­ erst wissenschaftlich nicht erklärt werden kann. Durch zahl­ reiche kleintechnische Versuche wurde erkannt, daß das eigentlich wirksame Agens nicht das leicht thermisch zer­ setzbare Magnesiumnitrat ist, sondern das sich bildende Stickstoffdioxid als starkes Oxidationsmittel.In the main patent P 43 28 195.8 was on the page 6 notes that the degradation mechanism of the magnesium nitrates on the polyamide-polyurethane fiber mixture cannot be explained scientifically. By number Rich small-scale experiments were recognized that the Actually effective agent is not easily thermally broken is settable magnesium nitrate, but the formed Nitrogen dioxide as a strong oxidizing agent.

Als reaktive Komponente wirkt bei dem Faserabbau immer Stick­ stoffdioxid, unabhängig von der Herstellungsweise.Stick always acts as a reactive component in fiber degradation substance dioxide, regardless of the production method.

Das Prinzip des Polymer-Abbauverfahrens beruht auf der Grund­ lage, daß im Gefüge der Textilfasern in wenigen Minuten (etwa 15 Minuten) Behandlungszeit mit nitrosen Gasen bei 110 bis 150 Grad Celsius eine Degradation erreicht wird, für die die Natur mehrere Jahre benötigt.The principle of the polymer degradation process is based on the reason was that in the structure of the textile fibers in a few minutes (about 15 minutes) treatment time with nitrous gases at 110 to 150 degrees Celsius a degradation is reached for which the Nature takes several years.

Nitrose Gase werden durch Verbrennungsprozesse in Heizkraft­ werken, Industriefeuerungsanlagen, Gasturbinen und durch Autoabgase als Schadstoffe in die Umwelt entlassen. Sie las­ sen sich für dieses Verfahren verwenden, wobei sich die Ab­ gastemperaturen ebenfalls verfahrenstechnisch verwerten lassen. Nitrous gases are generated by combustion processes in heating power plants, industrial combustion plants, gas turbines and through Car emissions released into the environment as pollutants. She was reading sen use for this procedure, the Ab also utilize gas temperatures from a process engineering perspective to let.  

Aus diesen chemisch modifizierten Textilfasern, vorwiegend Abfälle und Reststoffe, können allein oder in Mischung mit lignocellulosen Fasern kontinuierlich oder diskontinuierlich Platten und Formteile ohne Zusatzbindemittel bei erniedrigten Temperaturen hergestellt werden.From these chemically modified textile fibers, mainly Waste and residues can be used alone or in a mixture with Lignocellulosic fibers continuously or discontinuously Sheets and moldings without additional binders at low Temperatures are established.

AusführungsbeispielEmbodiment

Teppichabfälle aus vorwiegend Polyamid 6,6 werden mit nitro­ sen Gasen 10 Minuten bei 120 Grad Celsius behandelt. Diese so behandelten Abfälle werden zwischen 175 bis 210 Grad Cel­ sius ohne Bindemittel mit 15 bis 25 Sekunden/Millimeter im diskontinuierlichen Verfahren zu einer Platte verpreßt. Die Restfeuchte des Fasermaterials muß im Bereich zwischen 6 und 12% liegen.Carpet waste made primarily of polyamide 6.6 is treated with nitro Gases treated at 120 degrees Celsius for 10 minutes. These waste treated in this way is between 175 to 210 degrees Cel sius without binder with 15 to 25 seconds / millimeter im discontinuous process pressed into a plate. The Residual moisture of the fiber material must be between 6 and 12% lie.

Claims (4)

1. Verfahren zum schnellen polymeren Abbau von Polyamid- Polyurethan-Faserstoffen und deren Homologe und Mischungen mit anderen Faserstoffen, gekennzeichnet da­ durch, daß diese Stoffe ganz oder teilweise bestehend aus Polyamid und Polyurethan mit Stickstoffdioxid 1 bis 15 Minuten bei 110 bis 140 Grad Celsius in der gasför­ migen Phase thermobehandelt werden.1. Process for the rapid polymeric degradation of polyamide-polyurethane fiber materials and their homologues and mixtures with other fiber materials, characterized in that these substances consist entirely or partially of polyamide and polyurethane with nitrogen dioxide in 1 to 15 minutes at 110 to 140 degrees Celsius the gaseous phase can be thermally treated. 2. Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß Rauchgase aus Verbrennungsanlagen, die bekanntlich nitrose Gase enthalten (200 mg/cbm) und deren Abgas­ temperaturen zwischen 120 bis 250 Grad Celsius liegen, bei ca. 110 bis 140 Grad Celsius verwertet werden.2. The method according to claim 1, characterized in that Smoke gases from incinerators, as is known contain nitrous gases (200 mg / cbm) and their exhaust gas temperatures are between 120 and 250 degrees Celsius, can be recycled at approx. 110 to 140 degrees Celsius. 3. Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß das Stickstoffdioxid durch separates Erwärmen einer konzentrierten Salpetersäure bei 120 bis 125 Grad Cel­ sius gebildet wird und dann als Gas den polymeren Abbau vollzieht.3. The method according to claim 1, characterized in that the nitrogen dioxide by heating one separately concentrated nitric acid at 120 to 125 degrees Cel sius is formed and then as a gas the polymeric degradation takes place. 4. Verfahren nach Anspruch 1, gekennzeichnet dadurch, daß aus den chemisch modifizierten Textilfaserstoffen allein oder in Mischung mit lignocellulosen Fasern ohne zusätz­ liche Bindemittel neue Werkstoffe im Heißpreßverfahren bei erniedrigten Temperaturen hergestellt werden können.4. The method according to claim 1, characterized in that from the chemically modified textile fibers alone or in a mixture with lignocellulosic fibers without additional binders new materials in the hot pressing process can be produced at low temperatures.
DE1995105337 1993-08-21 1995-02-17 Rapid polymeric decomposition of polyamide-polyurethane fibre materials, used as moulding material Ceased DE19505337A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1995105337 DE19505337A1 (en) 1993-08-21 1995-02-17 Rapid polymeric decomposition of polyamide-polyurethane fibre materials, used as moulding material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4328195A DE4328195A1 (en) 1993-08-21 1993-08-21 Process for the production of fibreboard and fibre mouldings of medium and high density by the dry process from lignocellulosic fibres and chemically modified polyamide-polyurethane secondary textiles
DE1995105337 DE19505337A1 (en) 1993-08-21 1995-02-17 Rapid polymeric decomposition of polyamide-polyurethane fibre materials, used as moulding material

Publications (1)

Publication Number Publication Date
DE19505337A1 true DE19505337A1 (en) 1996-08-22

Family

ID=6495735

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DE4328195A Withdrawn DE4328195A1 (en) 1993-08-21 1993-08-21 Process for the production of fibreboard and fibre mouldings of medium and high density by the dry process from lignocellulosic fibres and chemically modified polyamide-polyurethane secondary textiles
DE1995105337 Ceased DE19505337A1 (en) 1993-08-21 1995-02-17 Rapid polymeric decomposition of polyamide-polyurethane fibre materials, used as moulding material

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DE4328195A Withdrawn DE4328195A1 (en) 1993-08-21 1993-08-21 Process for the production of fibreboard and fibre mouldings of medium and high density by the dry process from lignocellulosic fibres and chemically modified polyamide-polyurethane secondary textiles

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DE (2) DE4328195A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201728A2 (en) * 2000-10-31 2002-05-02 Masaaki Yoshida Method for cutting polymer chains and method for producing chemical raw materials
WO2013032408A1 (en) * 2011-09-02 2013-03-07 Aquafil S.P.A. Method of polyamide fiber recycling from elastomeric fabrics

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19954633C2 (en) * 1999-11-13 2002-09-12 Thueringisches Inst Textil Process for improving the tearability of textile waste with a high elastane fiber content by crosslinking agents
CN104589455A (en) * 2015-01-05 2015-05-06 湖北大学 Method of manufacturing recoverable shaving board by polyamide
IT202200007520A1 (en) * 2022-04-14 2023-10-14 Consorzio Radici Per La Ricerca E Linnovazione S C A R L MECHANICAL RECYCLING OF MULTICOMPONENT POLYMER WASTE INCLUDING POLYAMIDE AND POLYURETHANE

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD61094A (en) * 1900-01-01
GB1252005A (en) * 1968-02-23 1971-11-03
DE1912657A1 (en) * 1968-03-15 1969-10-16 Borg Warner Method of manufacturing a fiberboard
SU397531A1 (en) * 1968-10-07 1973-09-17 BASED ON URETHANE RUBBER
GB1310355A (en) * 1969-07-03 1973-03-21 Foseco Trading Ag Fibre containing compositions
FR2193350A5 (en) * 1972-07-21 1974-02-15 Sebreg
JPS62199860A (en) * 1986-02-18 1987-09-03 カイハツボ−ド株式会社 Wooden fiber mat
DE8705262U1 (en) * 1987-04-09 1987-07-02 Illing, Reiner, Dipl.-Chem., 1000 Berlin, De

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1201728A2 (en) * 2000-10-31 2002-05-02 Masaaki Yoshida Method for cutting polymer chains and method for producing chemical raw materials
EP1201728A3 (en) * 2000-10-31 2003-04-16 Masaaki Yoshida Method for cutting polymer chains and method for producing chemical raw materials
WO2013032408A1 (en) * 2011-09-02 2013-03-07 Aquafil S.P.A. Method of polyamide fiber recycling from elastomeric fabrics

Also Published As

Publication number Publication date
DE4328195A1 (en) 1995-02-23

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