WO2023059685A1 - Élasthanne et fibres pouvant être retraités et articles associés - Google Patents

Élasthanne et fibres pouvant être retraités et articles associés Download PDF

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Publication number
WO2023059685A1
WO2023059685A1 PCT/US2022/045735 US2022045735W WO2023059685A1 WO 2023059685 A1 WO2023059685 A1 WO 2023059685A1 US 2022045735 W US2022045735 W US 2022045735W WO 2023059685 A1 WO2023059685 A1 WO 2023059685A1
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Prior art keywords
spandex
polyurethane
fiber
polymer
fabric
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PCT/US2022/045735
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English (en)
Inventor
Geoffrey D. Hietpas
Guan Wang
Hong Liu
Original Assignee
The Lycra Company Llc
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Filing date
Publication date
Application filed by The Lycra Company Llc filed Critical The Lycra Company Llc
Publication of WO2023059685A1 publication Critical patent/WO2023059685A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/70—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyurethanes
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
    • D03D13/008—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft characterised by weave density or surface weight
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/208—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based
    • D03D15/217—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based natural from plants, e.g. cotton
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/292—Conjugate, i.e. bi- or multicomponent, fibres or filaments
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/56—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads elastic
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/10—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyurethanes
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/061—Load-responsive characteristics elastic
    • 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

  • This disclosure relates to a stable segmented polyurethane for making spandex fiber that is useful in apparel and hygiene applications and which can affordably and efficiently be reprocessed into spandex fiber with similar properties when recovered via recycling from finished articles such as, but not limited to, apparel and hygiene applications in which it is used.
  • Polyurethane for making spandex fibers is a segmented copolymer with phase separated domains of both hard and soft segments that enable the fibers to stretch and recover.
  • Spandex fibers are widely used in apparel and hygiene applications to provide recoverable stretch to fabrics as well as improve their overall stretch properties by changing the modulus of extension relative to non-spandex containing fabrics (referred to here as ‘rigid’ fabrics).
  • the properties of spandex that enable the consumer benefits of recoverable stretch in garments are dependent on both the monomers used to make the polymer of the fiber, as well as the precise morphology of the polymer in the fiber (viz. configurations of the domains in the copolymer), and any additives.
  • polyurethane spandex fibers in textile and hygiene processes often involves the spandex fiber being blended in fabric form with another fiber (cotton, nylon, polyester, acrylic, wool) and then subjecting the fabric to a high temperature dye process (commonly from 90°C to 135°C in an aqueous environment, which may also be pressurized).
  • a high temperature dye process commonly from 90°C to 135°C in an aqueous environment, which may also be pressurized.
  • garments containing spandex may be worn for years by consumers during which time the garment is typically subjected to numerous wash and dry-cleaning processes, the majority of which are done above room temperature as well as time-induced aging of the product. Through all of these processes, the molecular weight of typical polyurethane spandex has been known to increase over time.
  • a method to avoid the challenges of spandex recycling is detailed in CN112726009A where a recyclable four-sided elastic lace fabric is disclosed and fabric construction is modified to eliminate the use of spandex in the fabric.
  • WO 2013/032408 Al discloses a method for controlled thermal degradation followed by a washing treatment for the destructive removal of spandex from garments. Since this method is destructive to the spandex, it is not suitable for a circular process in which the spandex from the garment can be reprocessed into useful spandex fiber.
  • US 2021/0246581A1 describes a general method to make a textile fiber in which the degree of polymerization in the recycled polymer is lower than it was before the recycling process.
  • WO 2021/060292 Al has been proposed to partially overcome the problem by redissolving spandex and blending it with virgin spandex to make a spandex fiber. This method, by definition however, does not enable a fully circular process as it requires addition of new non recycled materials into the process.
  • spandex is a requirement to enable a complete circular textile process so that the spandex component in garments does not become a waste product for the landfill, and that the spandex fiber can be remade in a way that does not require blending with virgin polymeric materials. In this manner the consumer can continue to gain the benefits of shape retention and recoverable stretch in garments with a fiber that participates in a fully circular process.
  • An aspect of this disclosure relates to a reprocessible segmented polyurethane polymer useful in production of spandex fiber which, when recycled from a finished article, exhibits similar characteristics to the original segmented polyurethane polymer and/or spandex.
  • spandex fiber comprising this reprocessible segmented polyurethane polymer.
  • Another aspect of this disclosure relate to yarn comprising the spandex fiber comprising this reprocessible segmented polyurethane polymer.
  • Another aspect of this disclosure relates to stretch fabrics and garments comprising these stretch fabrics which comprise spandex fiber or yarn comprising spandex fiber comprising this reprocessible segmented polyurethane polymer.
  • Mw weight average molecular weight
  • PD polydispersity
  • Mw weight average molecular weight
  • PD polydispersity
  • “Spandex” is a manufactured filament in which the filament-forming substance is a long chain synthetic polymer comprised of at least 85% by weight of segmented polyurethane or polyurethane-urea.
  • a polyurethane, polyurethane-urea, and a segmented polyurethane or polyurethane-urea polymer are used interchangeably in this disclosure and use of any of these terms is meant to encompass each of these polymers.
  • a polyurethane with high stability means that the weight average polymer molecular weight of the fiber is relatively stable under storage and process conditions, within a range of ⁇ 25% and preferably within ⁇ 20%, after the fiber is formed. It also means the polymer has a low and stable polydispersity.
  • grey fiber, yarn or fabric any un-bleached, un-dyed or un-treated fiber, yarn or fabric which may or may not be modified by mechanical processes such as drafting, twisting, plating with other fibers, co-mingling, and/or rewinding.
  • finished article it is meant to include any spandex containing fiber, fabric, garment or hygiene article wherein the greige fiber, yarn or fabric from which the article originated has been modified from its un-bleached, un-dyed and/or un-treated form.
  • finished article it is meant to include any spandex containing fibers or yarns, or fabrics, garments or article thereof that are knitted, woven or nonwoven and processed by a thermal treatment at any temperature or combination of temperatures in the range 100°C to 210°C.
  • finished article it is meant to include spandex containing fibers, yarns or fabrics and articles produced therefrom which are dyed by any known dye process, such as, but not limited to, disperse, acid, anionic, cationic, and reactive textile dyes following standard methods.
  • the dye process can also be done in a waterless fashion using, for example, carbon dioxide as the dye carrier.
  • the finished article goes through both thermal treatment and dyeing processes.
  • finished article it is meant a fabric, garment or other article made from fibers or yarns that are knitted, woven or nonwoven, processed by a thermal treatment at any temperature or combination of temperatures in the range 100°C to 210°C, but do not go through a dye process or alternatively, a fabric, garment or other article made from fibers or yarns that is knitted, woven or nonwoven and is dyed by any known dye process, such as disperse, acid, anionic, cationic, and reactive textile dyes following standard methods but does not go through a thermal treatment above 100°C after or before the dye process step.
  • Examples of finished articles of this disclosure include, but are in no way limited to, any scoured and/or bleached and/or dyed and/or heat treated spandex containing fiber or yarn or fabric or garments prepared from treated spandex containing fiber or yarn or fabric, denim fabric and garments prepared therefrom, ready-to wear garments, hosiery, leggings, sportswear, underwear, bras, socks and disposable hygiene articles including, but not limited to disposable diapers, training pants, adult incontinence devices and products, catamenial devices, garments and products, bandages; wound dressings, surgical drapes, surgical gowns, surgical or other hygienic protective masks, hygienic gloves, head coverings, head bands, ostomy bags, bed pads, bed sheets, and the like.
  • the reprocessible segmented polyurethane polymer of this disclosure is comprised of a polyether-based glycol, a diisocyanate, a chain extender and a terminator. Any of these ingredients can be a single component by its chemical identity or a mixture of two or more chemicals.
  • the chain extender can be a diol or a diamine, and the terminator can be a monofunctional alcohol or amine.
  • the reprocessible segmented polyurethane polymer can be produced in a batch or a continuous process.
  • the reprocessible segmented polyurethane polymer of this disclosure has reduced secondary chain extension in order to provide at least partial permanent termination to provide molecular weight stability to the polymer after fiber formation.
  • the polyurethane of the polymer has sufficiently high molecular weight that it can be made into a spandex fiber that is capable of being knit or woven into fabrics that are subjected to dye processes such as those used to dye cotton, polyester, nylon, wool or blends thereof. It is stable to the high temperature processes used for heat setting of fabrics, and it is stable to the effects of long term aging of the product during the life of a garment by the consumer. This includes garment care such as washing and tumble drying or drying in sunlight in the open air.
  • the reprocessible segmented polyurethane polymer of this disclosure has a unique combination of properties that keeps the molecular weight of the polymer sufficiently high enough to allow fiber making but not too high so as to have too much viscosity when dissolved in a solvent for dry spinning.
  • the reprocessible segmented polyurethane polymer must be consistently in that range by having a low polydispersity through fiber making, fabric production, and consumer use in garment form, such that the polyurethane chemistry of the invention can be re-processed cost effectively into fiber with similar characteristics after collection from a waste stream or as part of a circular recycling process.
  • Mw weight average molecular weight
  • PD polydispersity
  • Mw weight average molecular weight
  • PD polydispersity
  • the reprocessible segmented polyurethane polymer of this disclosure can be used to produce a polyurethane spandex fiber with a unique set of properties that includes at least partial termination, a hard segment with the melting temperature not higher than 250°C, a polyether based glycol with a molecular weight between 1000 and 3000, a % NCO of isocyanate terminated prepolymer between 5.0 and 7.5, and a denier per filament of 8 to 20.
  • the spandex of the invention can be melt-spun, dry-spun or wet-spun to form the fiber. Additives can also be added to the spandex of the invention.
  • spandex may also have a finish applied to the fiber surface or incorporated into the fiber that is based on silicone, mineral oil, aliphatic ethoxylates, or combinations thereof.
  • the reprocessible segmented polyurethane polymer is useful in production of spandex fiber which, when recycled from waste materials into new materials and objects, exhibits similar characteristics to the original polymer and/or spandex.
  • this disclosure also relates to spandex fiber comprising this reprocessible segmented polyurethane polymer, yams comprising the spandex fiber comprising this reprocessible segmented polyurethane polymer, and to stretch fabrics and garments comprising these stretch fabrics which comprise the spandex fiber and/or yams comprising this reprocessible segmented polyurethane polymer.
  • the spandex fiber can be remade in a way that does not require blending with virgin polymeric materials.
  • Yarns of this disclosure may be prepared by various methods including, but not limited to, core spinning, co-mingling or twisting of the spandex fiber with one or more additional fibers or yarns.
  • additional fibers or yarns are those comprising cotton, polyester or nylon or combinations thereof.
  • knitted or woven fabric comprising this spandex exhibits characteristics which will meet consumer expectations with respect to stretch and recovery behavior of spandex containing articles.
  • the fabric is a woven fabric comprising 0.5 to 18% of the spandex fiber comprising this reprocessible segmented polyurethane polymer. In one nonlimiting embodiment, the fabric is a denim fabric.
  • the fabric is a knit fabric comprising 1 to 50% spandex fiber comprising this reprocessible segmented polyurethane polymer.
  • the spandex fiber is also expected to be useful in hygiene applications in which spandex is routinely used.
  • hygiene applications include disposable diapers, training pants, adult incontinence devices and products, catamenial devices, garments and products, bandages; wound dressings, surgical drapes, surgical gowns, surgical or other hygienic protective masks, hygienic gloves, head coverings, head bands, ostomy bags, bed pads, bed sheets, and the like.
  • this disclosure relates to recycled spandex and articles comprising recycled spandex produced from the reprocessible segmented polyurethane polymer which has been removed from a finished article.
  • the reprocessible segmented polyurethane polymer is removed from a fabric or garment or article used in hygiene applications by processing with a solvent in which the segmented polyurethane polymer dissolves and then reprocessed using conventional dry spinning or melt spinning to make a spandex fiber that has a polydispersity of 4.0 or lower, a Mw below 180,000, and a hard segment melting temperature of 250°C or lower.
  • the recycled article comprises at least 20% of the recycled spandex.
  • the recycled article comprises at least 50% of the recycled spandex.
  • this disclosure relates to methods for production of a recyclable spandex containing article via incorporating into the article spandex fiber comprising this reprocessible segmented polyurethane polymer.
  • Fabric tensile testing for knitted fabrics is performed according to ASTM D4964- 96. The samples were conditioned for 16 hours at 70° F and 65% relative humidity. Fabric tensile tests were performed by cycling to 50% elongation at 200% per minute. The fabric recovery force at 30% elongation on the third cycle is recorded as fabric recovery force. Fabrics were evaluated for % elongation under 7 kg load force in the fabric weft and warp directions. [00046] Fabric tensile testing and shrinkage for woven and denim fabrics is performed according to methods described in US 7637091B2.
  • Polyurethane samples were tested for %NCO according to US 6,472,494B2.
  • the polymer molecular weights are measured by a gel permeation chromatography (GPC), and the hard segment melting temperature or HSTm (peak position) of the polymer is measured by a differential scanning calorimetry (DSC) method at a heating rate of 10°C per minute.
  • Mw is the weight average molecular weight calculated as the sum of the weight fractions of polymer chains of differing chain length.
  • Mn is the number average molecular weight calculated as the sum of the mole fractions of the polymer chains of differing chain length.
  • segmented polyurethane of this disclosure suitable for spinning into spandex fibers was made through a polymerization process by reacting poly(tetramethylene ether) glycol (PTMEG), methylene bis(4-phenyl isocyanate) (MDI) and ethylene glycol (EG) in dimethyl acetamide (DMAc), optionally with a catalyst.
  • PTMEG poly(tetramethylene ether) glycol
  • MDI methylene bis(4-phenyl isocyanate)
  • EG ethylene glycol
  • DMAc dimethyl acetamide
  • the formed viscous polymer solution was added to 0.50 grams of cyclohexylamine (CHA) in 2.00 grams of DMAc and mixed for 30 minutes before cooling down to room temperatures.
  • CHA cyclohexylamine
  • the formed polyurethane solution had a measured percentage of solids of 39.33%, a measured viscosity by falling-ball method at 40°C of 6105 poise, and an intrinsic viscosity of 1.06 dL/g for the dried films cast from this solution.
  • the %NCO is 5.75 based on the combined weight of PTMEG and MDI for the completed reaction. This solution was used to spin into spandex fibers by a conventional dry-spinning process.
  • the heat-set, then dyed samples are referred to as dyed fabrics.
  • Samples of the dyed fabrics where then dissolved in DMAc at 80°C to form a solution with 20% solids by weight. This solution was then dry-spun into a film.
  • the film samples of each item are referred to as recycled polymer.
  • the polymer molecular weights of the dyed and recycled polymer were measured by GPC.
  • the Polydispersity (Mw/Mn) referred to as PD was also calculated. Results are depicted in Table 1.
  • the fiber prepared from the polymer of this disclosure has high stability as compared to the other commercially available polyurethane-urea spandex because for both the dyed and recycled polymer form, the polymer composition exhibited the unique combination a Mw below 180,000, a poly dispersity (PD) below 4.0, and a hard segment melting point below 250°C.
  • PD poly dispersity
  • the polyurethane of Example 1 was made into a 78 decitex - 4 filament spandex fiber by a conventional dry-spinning process.
  • the spandex fiber was core spun (Manufactured by Pinter - Spain) at 3.5X draft with cotton roving to make a 14/1 covered yarn with 40 picks per inch and 14 twists per inch.
  • the yarn was used as the filling yam in a 2x1 twill denim fabric construction (Dornier rapier loom - Germany).
  • the 14S covered yarn was used in weft direction and the warp was an 8/1 indigo dyed cotton yarn with 64 ends per inch.
  • the denim fabric was desized and scoured in a dye machine and then relaxed in 80°C water for 10 minutes. After relaxing, fabric was air-dried on a rack. Properties of the fabrics are disclosed in Table 2.
  • the polyurethane polymer of Example 1 was made into a 78 decitex - 4 filament spandex fiber by a conventional dry-spinning process. It was then knitted on a 28 gg CK machine (Monarch - England) at a 3. OX draft and it was plaited with 78dtex polyester yarn at every course to make a single jersey construction fabric. The fabric was scoured at 80 °C for 30 minutes and then heat set at 185 °C for 60 seconds. Fabric was dyed at 130°C for 60 minutes and then air dried.
  • a control fabric was made identically except a polyurethane-urea spandex fiber was used (The LYCRA Company type 78dtex type 582L) and the fabric was heat set at 192°C for 60 seconds.
  • the stretch properties of the fabrics when stretched in the width direction, measured according ASTM D4964-96 are provided in Table 3. Table 3
  • This example indicates the method of the invention has similar stretch and recovery properties to a standard polyurethane-urea spandex.
  • a circular knit fabric made from a spandex fiber made from the polymer of Example 1 was prepared, treated by scouring at 80°C for 15 minutes. It was then heat set at 180°C for 60 seconds and processed in a conventional disperse dye process conditions of 130°C pressurized aqueous conditions for 60 minutes at a pH of 4-5. The treated fabric was then dissolved in DMAc at 80°C to form a solution with 39% solids. The polymer molecular weights were monitored by GPC in this recycling process as shown in Table 4.
  • Example 1 The polyurethane of Example 1 was made into a 78 decitex - 4 filament spandex fiber by a conventional dry-spinning process. It was then knitted on a 28 gg CK machine at 1.5X draft, and plaited with 60s cotton yarn at every course to make a single jersey construction circular knit fabric. Fabric was scoured at 80 °C for 30 minutes then heat set at 185 °C for 60 seconds. Fabric was dyed at 130°C for 60 minutes and air dried. The fabric had a desirable high power in the weft direction. This fabric, 1000 grams in total weight, was cut into pieces about 25 x 25 centimeters, and placed in 4000 grams of DMAc to dissolve the spandex fibers.
  • the mixture of cotton fabrics and spandex solution was processed through a mechanical press to extract and separate the polymer solution from the undissolved cotton.
  • the collected polyurethane polymer solution was then precipitated in water, and then dried at about 70°C for 2 days. A total of 330 grams of dried polyurethane polymer was collected. This dried polymer was dissolved in DMAc to prepare a solution of 39% solids.
  • Polymer films were prepared from a solution of the polymer in example- 1 have a number average molecular weight (Mn) at 29838 Daltons and a weight average molecular weight at 88253 Daltons measured by gel permeation chromatography (GPC) method.
  • the precipitated and dried polymer solids of example-5 have a Mn and Mw at 34523 and 92073 Daltons respectively. This example demonstrates the stability of the molecular weight to the conditions of the textile processing route.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Botany (AREA)
  • Woven Fabrics (AREA)
  • Knitting Of Fabric (AREA)
  • Artificial Filaments (AREA)
  • Multicomponent Fibers (AREA)

Abstract

L'invention concerne un polymère de polyuréthane segmenté stable pour fabriquer une fibre d'élasthanne qui est utile dans des applications d'habillement et d'hygiène et qui peut être retraitée de manière abordable et efficace en fibre d'élasthanne ayant des propriétés similaires lorsqu'elle est récupérée par recyclage à partir d'applications d'habillement et d'hygiène dans lesquelles elle est utilisée.
PCT/US2022/045735 2021-10-08 2022-10-05 Élasthanne et fibres pouvant être retraités et articles associés WO2023059685A1 (fr)

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Citations (10)

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US20040068080A1 (en) * 2002-10-04 2004-04-08 Hong Liu Spandex of a particular composition and process for making same
US7637091B2 (en) 2005-02-11 2009-12-29 Invista North America S.á.r.l. Stretch woven fabrics
US20100152405A1 (en) * 2005-12-06 2010-06-17 E.I. Du Pont De Nemours And Company Thermoplastic polyurethanes comprising polytrimethylene ether soft segments
EP2203492A1 (fr) * 2007-10-22 2010-07-07 Lubrizol Advanced Materials, Inc. Polyuréthane thermoplastique souple, élastique, exempt de plastifiant et procédé pour synthétiser celui-ci
WO2013032408A1 (fr) 2011-09-02 2013-03-07 Aquafil S.P.A. Procédé de recyclage de fibres de polyamide à partir de textiles élastomères
WO2021060292A1 (fr) 2019-09-24 2021-04-01 旭化成株式会社 Fibre élastique de polyuréthane recyclé, procédé de production de celle-ci, structure fibreuse contenant ladite fibre élastique de polyuréthane recyclé, élément de collecte et matériau d'hygiène
CN112726009A (zh) 2020-12-22 2021-04-30 东莞超盈纺织有限公司 一种增强3d效果且可回收的四面弹蕾丝织物及其制备方法
US20210246581A1 (en) 2020-02-06 2021-08-12 Evrnu, Spc Retrieving and repolymerizing textile fibers

Patent Citations (10)

* Cited by examiner, † Cited by third party
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