WO2013032408A1 - Procédé de recyclage de fibres de polyamide à partir de textiles élastomères - Google Patents

Procédé de recyclage de fibres de polyamide à partir de textiles élastomères Download PDF

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Publication number
WO2013032408A1
WO2013032408A1 PCT/SI2011/000049 SI2011000049W WO2013032408A1 WO 2013032408 A1 WO2013032408 A1 WO 2013032408A1 SI 2011000049 W SI2011000049 W SI 2011000049W WO 2013032408 A1 WO2013032408 A1 WO 2013032408A1
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WO
WIPO (PCT)
Prior art keywords
polyamide
spandex
solvent
fibers
washing
Prior art date
Application number
PCT/SI2011/000049
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English (en)
Inventor
Robert ROBELLO
Fabrizio Calenti
Denis JAHIČ
Mašenka MIKUŽ
Original Assignee
Aquafil S.P.A.
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Publication date
Application filed by Aquafil S.P.A. filed Critical Aquafil S.P.A.
Priority to PCT/SI2011/000049 priority Critical patent/WO2013032408A1/fr
Publication of WO2013032408A1 publication Critical patent/WO2013032408A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • 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
    • C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
    • C08J11/08—Recovery or working-up of waste materials of polymers without chemical reactions using selective solvents for polymer components
    • 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
    • C08J11/12—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 dry-heat treatment only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0203—Separating plastics from plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
    • B29B17/02—Separating plastics from other materials
    • B29B2017/0213—Specific separating techniques
    • B29B2017/0293—Dissolving the materials in gases or liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2313/00—Use of textile products or fabrics as reinforcement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/726—Fabrics
    • 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
    • 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

Definitions

  • the present invention relates to a method of polyamide fiber recycling from elastomeric fabrics, i.e. a method of controlled thermal degradation and wash separation of spandex from fabric or garments containing polyamide fiber, in order to prepare the polyamide fiber and/or spandex for recycling or disposal.
  • the present invention pertains to a controlled thermal degradation of spandex and polyamide fabric or garment with minimal reduction in molecular weight, degradation, and oxidation to polyamide fabric and a wash treatment to separate the degraded spandex from high purity polyamide into separate raw material streams for recycling or disposal.
  • Fabrics containing polyamide fibers and spandex are used in many apparel, industrial and medical applications.
  • the fabrics can vary in the content of spandex relative to polyamide fiber contents. Typical content levels are 5% - 25% (w/w) spandex and 95% - 75% (w/w) polyamide in the fabrics. Since spandex and polyamide polymers have very different chemical properties and production techniques, the post-industrial and post-consumer fabrics and garments that are retrieved are very difficult to recycle in an economical and environmentally acceptable way.
  • Spandex has a known temperature instability, namely it is known that in a heat setting process of fabrics, such as apparel, the temperature treatment must be performed within certain temperature and time limits, because spandex will thermally degrade and oxidize if exposed to excessive temperature for longer periods of time, thereby causing fabric or garment issues, such as mechanical damages or dyeing problems.
  • solvent techniques for dissolving spandex or polyamide fibers from fabrics and garments.
  • DMAc dimethylacetamide
  • DMF dimethylformamide
  • Both of these solvent-based processes have disadvantages in the amount of solvent needed, environmental issues, dangerous processing, cost of industrial scale-up, operational costs and other issues.
  • the aim and scope of this invention is a method of using thermal degradation and washing for separation of fiber components in elastomeric fabrics so that spandex fibers are dissolved and the remaining polyamide fibers are usable for recycling.
  • the dissolved spandex in the solvent as well as the solvent itself can also be recycled.
  • segmented polyurethanes refers to elastomeric polyurethane comprising at least 85% (w/w) segmented polyurethanes based on polyethers, polyesters and/or polycarbonates for example.
  • Segmented polyurethanes can be made by reacting a polymeric diol (most often a polyetherglycol or a polyester glycol) with an organic diisocianate to form an isocianate-terminated polymer which is chain-extended by a reaction with a diamine or a diol.
  • a polymeric diol most often a polyetherglycol or a polyester glycol
  • organic diisocianate to form an isocianate-terminated polymer which is chain-extended by a reaction with a diamine or a diol.
  • spandex fibers resemble rubber in both stretch and recovery properties, but are far superior to rubber in their resistance to sunlight, heat, abrasion, oxidation, oils, and chemicals.
  • Spandex has the widest use of any of the elastomeric fibers, and is sold as an elastomeric fiber under that designation or under trade names such as Lycra (made by Invista, previously a part of DuPont), ELASPAN (Invista), RadElast (Radici), Creora (Hyosung), ROICA and Dorlastan (Asahi Kasei), Linel (Fillatice), ESPA (Toyobo), Cleerspan, Glospan, Numa, etc.
  • Lycra made by Invista, previously a part of DuPont
  • ELASPAN Invista
  • RadElast RadElast
  • Creora Heyosung
  • ROICA and Dorlastan
  • Dorlastan Asahi Kasei
  • Linel Fillatice
  • ESPA Toyobo
  • Cleerspan Glospan, Numa, etc.
  • a typical example of spandex fibers is described in US Patent No. 4,973,647 (E
  • Spandex fibers described in the mentioned patent are typically used in combination with nylon-6 yarns for tricot fabrics with edge-curl resistance.
  • the term "elastomeric fabric” refers to any fabric from post industrial or post consumer process, containing various portions of spandex fibers and various portions of other synthetic fibers; and the term “elastomeric clothing articles” refers to any apparel article, from post industrial or post consumer process, containing various portions of spandex fibers and various portions of other synthetic fibers.
  • polyamide fibers refers to polyamide fibers including polyamide 6 (caprolactam), polyamide 6.6 (hexamethylene adipamide), their copolymers, any combination thereof or any combination thereof with other polyamides.
  • the present invention relates to a method of separation of spandex from fabric or garment containing polyamide fiber involving the following steps: a. ) controlled thermal degradation of spandex in an atmosphere containing any combination of gasses that do not cause excessive degradation of polyamide fibers, preferably in an inert gas atmosphere; b. ) removal of degraded spandex by washing in a solvent, preferably polar solvent, such as Ethanol, DMAc, DMF or water; and c. ) removal of excess solvent possibly containing degraded spandex from remaining polyamide fibers.
  • a solvent preferably polar solvent, such as Ethanol, DMAc, DMF or water
  • Thermal degradation step is based on inability of spandex to withstand high temperatures under moderate pressure without thermally degrading.
  • the thermal degradation process in this invention will change the structure of spandex into short soft fibers and particulate sections which can readily be removed by washing with an appropriate solvent.
  • the temperatures and pressures used for thermal degradation of spandex as outlined in this invention have a limited negative impact on physical properties of polyamide fibers which still renders them usable for recycling.
  • the fabric is then washed with a solvent, preferably polar solvent such as ethanol, to effectively remove degraded spandex. Excess solvent is then removed from polyamide fibers.
  • the resulting polyamide fibers exhibit high purity and physical properties that are suitable for recycling into high quality products, such as low side reactions, low levels of degradation and oxidation.
  • the degraded spandex fiber is optionally filtered and distilled to recover the solvent for re-use.
  • Spandex fractions can optionally be extracted, preferably using filtration and/or distillation and have many potential end-use applications.
  • a schematic of the process is as follows: a) . Thermal treatment of elastomeric fabric and elastomeric clothing articles
  • Thermal treatment is carried out in an autoclave or other suitable vessel at controlled conditions (atmosphere, time, temperature, pressure, humidity). It is carried out in an inert gas atmosphere or air atmosphere. It can also be carried out in any other suitable atmosphere that does not cause excessive degradation of polyamide fibers.
  • Temperature range used during thermal treatment if polyamide fibers include polyamide 6 fiber is 150'C - 220°C, preferably from 190°C -216"C. In case polyamide fibers consist predominantly of polyamide 6.6, the temperature range is 150°C - 260°C, preferably from 190°C -216°C. Temperatures can either be maintained in this range during the whole duration of thermal treatment or optionally achieved before the end of the thermal treatment.
  • Elastomeric fabrics are treated for between 0.1 hours and 24 hours, preferably 0.5 - 4 hours.
  • the pressure in thermal treatment is 0.1 - 10 bar.
  • Humidity is controlled within the range of 0.001% - 10%. No additive is added.
  • Washing treatment is carried out at controlled processing conditions (solvent selection, time, temperature, agitation level, pressure).
  • Polar solvents are used, preferably ethanol.
  • the temperature range used is 5°C - 78°C.
  • the time of treatment used is 0.01 - 10 hours.
  • Solution containing fabrics is agitated during washing treatment.
  • One or more washing cycles are applied, more washing cycles result in higher degree of spandex removal and higher degree of purity of remaining polyamide fibers.
  • c) Removal of excess solvent, separation and collection of individual fiber components
  • components after washing treatment are: solvent, spandex and polyamide fibers. Excess solvent is removed from polyamide fibers and polyamide fibers are collected for further recycling. Solvent is filtered and purified (distilled), recollected and returned for re-use in washing process. Spandex and its degraded components are collected from filters and distillation impurities for disposal as waste or collected for further recycling.
  • Example 1 Warp 80°/o/20% 180 Dry, argon knitted
  • Example 3 Warp 80°/o/20% 204 Dry, argon knitted
  • Example 6 Warp 80%/20% 216 3.5 Dry, argon knitted
  • polyamide 6 multi-filament yarn fibers were exposed to the same conditions as described in examples 1 - 6 and compared to an untreated polyamide 6 multi-filament yarn sample.
  • the results are shown in Table 2.
  • Relative viscosity of the polymer is a measure of molecular weight. Lower relative viscosity indicates higher degradation. Lower whiteness index and higher yellowness index indicate higher oxidation levels.
  • thermofixing machine with air atmosphere, shown in Table 3.
  • thermofixing machine 10 g of elastomeric fabric were introduced into a thermofixing machine. Sample was inserted in the thermofixing machine immediately after the set temperature of 180"C was reached, and treated at 180°C from 0.1 - 2.0 hours.
  • thermofixing machine 10 g of elastomeric fabric were introduced into a thermofixing machine. Sample was inserted in the thermofixing machine immediately after the set temperature of 200 e C was reached, and treated at 200'C from 0.1 - 2.0 hours.
  • thermofixing machine 10 g of elastomeric fabric were introduced into a thermofixing machine. Sample was inserted in the thermofixing machine immediately after the set temperature of 213 e C was reached, and treated at 213°C from 0.1 - 2.0 hours.
  • polyamide 6 multi-filament yarn fibers were exposed to the same conditions as described in examples 7 - 10 and compared to an untreated polyamide 6 multi-filament yarn sample.
  • the results are shown in Table 4. Lower relative viscosity indicates higher degradation. Lower whiteness index and higher yellowness index indicate higher oxidation levels.
  • the percentage value of removed portion of fibers is calculated from a sample weight before a washing treatment and a sample weight after a washing treatment.
  • An increase in percentage value means increase in quantity of removed spandex fibers from the fabrics textile structure.
  • the starting percentage of spandex within the elastomeric fabrics before washing was 20%.
  • Washing treatment was performed in a glass flask. Ethanol p.a. was used as a solvent for all examples.
  • the weight of solvent used in each washing step was from 5 to 67 times the weight of the samples.
  • the intensity of agitation during treatment was variable. The times of treatment were between 2 and 35 minutes.
  • Table 5 shows the conditions applied in several examples of the washing treatment Table 5
  • Example 13 1:50 22 2, 5, 10, Strong agitation with 1
  • Example 14 1:50 22 30 Static; no stirring or 1 agitation
  • Example 17 1:5 22 15 Strong agitation with 1 shaking
  • Example 18 1:5 22 15 Strong agitation with 2 shaking
  • Example 19 1:10 78 35 Static, with strong 1 agitation every 5
  • Example 20 1:10 78 35 Static, with strong 2 agitation every 5
  • Example 21 1:10 78 35 Static, with strong 3 agitation every 5
  • Example 12 1.5 g of elastomeric fabric that was previously thermally treated according to Example 4 was introduced into a 50-ml glass flask. Solvent was added at a sample:solvent weight ratio 1:67. Solvent temperature was 78°C. Constant stirring was applied to the samples. A washing period was variable, 2 minutes, 5 minutes, 10 minutes, 15 minutes. Samples were washed by this procedure in one washing cycle.
  • Example 12
  • Example 4 1.5 g of elastomeric fabric that was previously thermally treated according to Example 4 was introduced into a 50-ml glass flask. Solvent was added at a sample:solvent weight ratio 1:50. Solvent temperature was 40 e C. Constant stirring was applied to the samples. A washing period was variable, 2 minutes, 5 minutes, 10 minutes, 15 minutes. Samples were washed by this procedure in one washing cycle.
  • Example 11 Example 12
  • Example 13 Example 14 during Fabric vs. Ethanol Fabric vs. Ethanol Fabric vs. Ethanol Fabric vs. Ethanol Fabric vs. Ethanol thermal ratio 1:67 (w/w) ratiol:50 (w:w) ratiol:50 (w:w) ratiol:50 (w:w) treatment
  • Example 4 2 17.21 2 16.98 2 18.34 Example 4 5 17.57 5 17.42 5 18.42 - Example 4 10 16.66 10 17.75 10 18.69 - -
  • Example 17 was repeated but samples were washed by this procedure in two washing cycles.
  • Example 15 Example 16
  • Example 17 Example 18 during Fabric vs. Ethanol Fabric vs. Ethanol Fabric vs. Ethanol Fabric vs. Ethanol Fabric vs. Ethanol thermal ratio 1:67 (w:w) ratio 1:10 (w:w) ratio 1:5 (w:w) ratio 1:5 (w:w) treatment
  • Example 1 10 2.63 30 2.86 - - - -
  • Example 6 10 - 30 19.45 15 11.83 15 16.25
  • Example 19 was repeated. Samples were washed by this procedure in two washing cycles.
  • Example 21 was repeated. Samples were washed by this procedure in two washing cycles.
  • Example 19 was repeated. Samples were washed by this procedure in three washing cycles. Results of Examples 19-21 are shown in Table 8.
  • Separated polyamide material can then be collected and can further be recycled.
  • Ethanol from washing process was collected, filtered and purified (distilled), to be returned back (solvent recycling) to washing process.
  • Spandex particles removed during washing process were collected for further disposal and possible recycling.
  • the present inventon therefore describes a method for removal of spandex from polyamide elastomeric fabrics, comprising of polyamide fibers (polyamide 6 and/or polyamide 6.6) including steps of thermal treatment and washing of degraded spandex using solvent.
  • the thermal treatment is performed in the temperature range of 150°C - 220°C, preferably 190°C - 216°C or in the case that polyamide fibers are predominantly polyamide 6.6 fibers of 150°C - 260 e C, preferably 190"C - 216°C.
  • the time of thermal treatment is between 0.1 hours and 24 hours, preferably 0.5 - 4 hours.
  • the pressure range between 0.1 bar and 10.0 bar, preferably 1.0 - 3.0 bar.
  • the washing step is performed in the temperature range from 5°C to 78°C and the time range of washing is between 0.1 hours and 5 hours, preferably 0.1 - 1.0 hours.
  • the amount of solvent is in the range of sample/solvent ratio between 1:1 (w/w) and 1:100 (w/w), preferably between 1:5 (w/w) and 1:20 (w/w).
  • the method also includes a further step of removal of excess solvent possibly containing degraded spandex from remaining polyamide fibers.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)

Abstract

La présente invention concerne un procédé de recyclage de fibres de polyamide comprenant des fibres de polyamide 6 et de polyamide 6.6, à partir de textiles élastomères comprenant des textiles de polyamide et d'élasthanne. Plus particulièrement, le type de matériau recyclé consiste en des textiles élastomères (par exemple des tricots à mailles jetées, des tricots circulaires, des textiles tissés, etc.) et des articles d'habillement élastomères (par exemple des vêtements de sport, des vêtements de bain, de la lingerie, etc.) contenant des fibres d'élasthanne. Les fibres d'élasthanne sont éliminées des textiles élastomères par le biais d'un procédé comprenant : une dégradation thermique contrôlée de l'élasthanne, un traitement par lavage contrôlé destiné à éliminer l'élasthanne en utilisant un solvant approprié et renouvelable, de préférence de l'éthanol, et l'étape finale destinée à éliminer le solvant en excès des fibres de polyamide. En plus des fibres de polyamide, le solvant et l'élasthanne peuvent également être recyclés.
PCT/SI2011/000049 2011-09-02 2011-09-02 Procédé de recyclage de fibres de polyamide à partir de textiles élastomères WO2013032408A1 (fr)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020130825A1 (fr) 2018-12-20 2020-06-25 Stichting Wageningen Research Procédé d'élimination de fibres de polyuréthane d'un tissu ou d'un fil comprenant des fibres de polyuréthane et des fibres à base de cellulose
WO2022129022A1 (fr) 2020-12-17 2022-06-23 Basf Se Dépolymérisation sélective de polyamide 6 en caprolactame à partir de mélanges de polymères contenant du caprolactame et de polymères contenant du polyuréthane, en particulier de copolymères séquencés de polyuréthane
WO2023044699A1 (fr) * 2021-09-24 2023-03-30 The Hong Kong Research Institute Of Textiles And Apparel Limited Procédés de séparation de textiles
WO2023059685A1 (fr) 2021-10-08 2023-04-13 The Lycra Company Llc Élasthanne et fibres pouvant être retraités et articles associés
IT202200007520A1 (it) 2022-04-14 2023-10-14 Consorzio Radici Per La Ricerca E Linnovazione S C A R L Riciclo meccanico di scarti polimerici multicomponenti comprendenti poliammide e poliuretano
EP4289586A1 (fr) 2022-06-07 2023-12-13 Sanko Tekstil Isletmeleri San. Ve Tic. A.S. Procédé et installation pour le recyclage de tissus
EP4306584A1 (fr) 2022-07-11 2024-01-17 Cap Iii B.V. Procédé de récupération d'epsilon-caprolactame et de polyéther polyuréthane à partir de matériaux comprenant du nylon 6 et du polyéther polyuréthane
EP4306586A1 (fr) 2022-07-11 2024-01-17 Cap Iii B.V. Procédé de récupération de spandex et de nylon à partir de matériaux comprenant du spandex et du nylon
EP4306585A1 (fr) 2022-07-11 2024-01-17 Cap Iii B.V. Procédé de récupération d'epsilon-caprolactame et de polyéther polyuréthane à partir de matériaux comprenant du polyamide 6 et du polyéther polyuréthane
WO2024074523A1 (fr) 2022-10-04 2024-04-11 Basf Se Séparation de fibres élastiques dans des matériaux textiles

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Publication number Priority date Publication date Assignee Title
US4973647A (en) 1989-05-31 1990-11-27 E. I. Du Pont De Nemours And Company Fiber from polyether-based spandex
US5233021A (en) 1992-05-13 1993-08-03 Georgia Tech Research Corporation Recycling of polymeric materials from carpets and other multi-component structures by means of supercritical fluid extraction
DE19505337A1 (de) * 1993-08-21 1996-08-22 Auerbacher Ing Handel Verfahren zur Herstellung von Faserplatten und Faserformteilen mittlerer und hoher Dichte im Trockenverfahren aus lignocellulosen Fasern und chemisch modifizierten Polyamid - Polyurethan - Sekundärtextilien
JP2008031127A (ja) * 2006-07-31 2008-02-14 Toray Ind Inc ポリウレタン加工したナイロン繊維のケミカルリサイクル方法
JP2011088943A (ja) * 2009-10-20 2011-05-06 Toray Ind Inc ナイロン６製品のリサイクル方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4973647A (en) 1989-05-31 1990-11-27 E. I. Du Pont De Nemours And Company Fiber from polyether-based spandex
US5233021A (en) 1992-05-13 1993-08-03 Georgia Tech Research Corporation Recycling of polymeric materials from carpets and other multi-component structures by means of supercritical fluid extraction
DE19505337A1 (de) * 1993-08-21 1996-08-22 Auerbacher Ing Handel Verfahren zur Herstellung von Faserplatten und Faserformteilen mittlerer und hoher Dichte im Trockenverfahren aus lignocellulosen Fasern und chemisch modifizierten Polyamid - Polyurethan - Sekundärtextilien
JP2008031127A (ja) * 2006-07-31 2008-02-14 Toray Ind Inc ポリウレタン加工したナイロン繊維のケミカルリサイクル方法
JP2011088943A (ja) * 2009-10-20 2011-05-06 Toray Ind Inc ナイロン６製品のリサイクル方法

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020130825A1 (fr) 2018-12-20 2020-06-25 Stichting Wageningen Research Procédé d'élimination de fibres de polyuréthane d'un tissu ou d'un fil comprenant des fibres de polyuréthane et des fibres à base de cellulose
NL2022268B1 (en) 2018-12-20 2020-07-15 Stichting Wageningen Res Method for removal of polyurethane fibres from a fabric or yarn comprising polyurethane fibres and cellulose-based fibres
WO2022129022A1 (fr) 2020-12-17 2022-06-23 Basf Se Dépolymérisation sélective de polyamide 6 en caprolactame à partir de mélanges de polymères contenant du caprolactame et de polymères contenant du polyuréthane, en particulier de copolymères séquencés de polyuréthane
WO2023044699A1 (fr) * 2021-09-24 2023-03-30 The Hong Kong Research Institute Of Textiles And Apparel Limited Procédés de séparation de textiles
WO2023059685A1 (fr) 2021-10-08 2023-04-13 The Lycra Company Llc Élasthanne et fibres pouvant être retraités et articles associés
IT202200007520A1 (it) 2022-04-14 2023-10-14 Consorzio Radici Per La Ricerca E Linnovazione S C A R L Riciclo meccanico di scarti polimerici multicomponenti comprendenti poliammide e poliuretano
WO2023199251A1 (fr) * 2022-04-14 2023-10-19 Consorzio Radici Per La Ricerca E L'innovazione S.C.A R.L. Recyclage mécanique de déchets polymères multicomposants comprenant du polyamide et du polyuréthane
EP4289586A1 (fr) 2022-06-07 2023-12-13 Sanko Tekstil Isletmeleri San. Ve Tic. A.S. Procédé et installation pour le recyclage de tissus
WO2023237555A1 (fr) 2022-06-07 2023-12-14 Sanko Tekstil Isletmeleri San. Ve Tic. A.S. Procédé et installation de recyclage de tissu
EP4306584A1 (fr) 2022-07-11 2024-01-17 Cap Iii B.V. Procédé de récupération d'epsilon-caprolactame et de polyéther polyuréthane à partir de matériaux comprenant du nylon 6 et du polyéther polyuréthane
EP4306586A1 (fr) 2022-07-11 2024-01-17 Cap Iii B.V. Procédé de récupération de spandex et de nylon à partir de matériaux comprenant du spandex et du nylon
EP4306585A1 (fr) 2022-07-11 2024-01-17 Cap Iii B.V. Procédé de récupération d'epsilon-caprolactame et de polyéther polyuréthane à partir de matériaux comprenant du polyamide 6 et du polyéther polyuréthane
WO2024013195A1 (fr) 2022-07-11 2024-01-18 Cap Iii B.V. Procédé de récupération de spandex et de nylon 6 à partir de matériaux comprenant du spandex et du nylon
WO2024013197A1 (fr) 2022-07-11 2024-01-18 Cap Iii B.V. Procédé de récupération d'epsilon-caprolactame et de polyéther polyuréthane à partir de nylon 6 et de polyéther polyuréthane comprenant des matériaux
WO2024013194A1 (fr) 2022-07-11 2024-01-18 Cap Iii B.V. Procédé de récupération d'epsilon-caprolactame et de polyéther polyuréthane à partir de polyamide 6 et de polyéther polyuréthane comprenant des matériaux
WO2024074523A1 (fr) 2022-10-04 2024-04-11 Basf Se Séparation de fibres élastiques dans des matériaux textiles

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