Classifications

• • 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
  • D02G3/36—Cored or coated yarns or threads
• • 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
  • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
  • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
  • D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/26—Formation of staple fibres
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
  • D01D5/30—Conjugate filaments; Spinnerette packs therefor
  • D01D5/34—Core-skin structure; Spinnerette packs therefor
• • 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
  • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
  • D01F8/02—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from cellulose, cellulose derivatives, or proteins
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
  • D06B1/00—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating
  • D06B1/04—Applying liquids, gases or vapours onto textile materials to effect treatment, e.g. washing, dyeing, bleaching, sizing or impregnating by pouring or allowing to flow on to the surface of the textile material
• • 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
  • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
  • D10B2201/01—Natural vegetable fibres
• • 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
  • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
  • D10B2201/01—Natural vegetable fibres
  • D10B2201/02—Cotton
• • 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
  • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]

Definitions

• the present invention relates to the field of yarn production and to fabrics in general.
• the present invention relates to a yarn using short cellulosic, e.g. cotton, staple fibers typically obtained from recycling of yarns and fabrics, wherein the yarn is suitable for workwear garments and for medical garments.
• Known recycling processes for fabrics and yarns generally include mechanically breaking down the textiles into loose fibers that can be used for spinning new yarns.
• machines are used that break down the fabric e.g. by means of rotating drums with metal pins.
• the mechanical strain on the fibers in the yarns causes the breakage of at least part of original fibres into shorter fibres.
• a problem with recycled cotton fibers is that their content of short length fibers makes them unsuitable or badly suitable for yarn manufacturing, in particular in ring spinning machines, that is commonly used for denim production.
• Virgin cotton staple fibers have a greater amount of long fibers than recycled cotton fibers; e.g. the average length L(n) (considering all of the fibers of a yarn) of virgin cotton is usually greater than 20 mm, while recycled staple cotton fibers have an average length L(n) that is usually below 15 mm, usually between 6 and 15 mm, more commonly between 9 - 12 mm.
• work-wear and medical garments are subject to frequent washing cycles, that usually involves temperatures and/or chemicals that are more aggressive than home washing cycles.
• Yarns made from recycled cotton usually are not able to withstand a high number of industrial washing cycles.
• the short length of cotton fibers typically results in a yarn having a too low strength, resulting in a poor fabric, or may not even be workable into a yarn due to the breakages of the combined fibers occurring in the yarn manufacturing machines.
• recycled cotton fibers have been mixed with virgin cotton fibers to impart to the final yarn acceptable mechanical properties and physical characteristics, such as the bulkiness and appearance, of yarns containing 100% virgin natural fiber, e.g. virgin cotton.
• the ratio of the amount of virgin cotton fibers (CO) to recycled cotton fibers (RCO) by weight in a yarn depends from the yarn production technique.
• open end yarns may comprise up to 100% recycled cotton, while in ring spun yarns RCO content does not exceed 40% (by weight) and generally the ratio (by weight) CO/RCO is in the range of 70/30 to 90/10.
• polyester staple fibers are mixed with cotton fibers before being spun into a yarn; these yarns have the drawback that due to the presence of polyester they have a poor look, i.e. a non-cotton look.
• US20150176160 discloses a fabric provided with core-spun yarns, having a draw textured yarn core and a cotton staple fibers sheath.
• JP362028426A discloses a polyolefin resin composition.
• EP3701840A1 discloses a method for recycling short cotton fibers residues.
• Core-spun yarns having a core including polyester filaments are also known; the use of recycled cotton in core-spun yarns is usually disadvantageous as, during production, the sheath of recycled cotton tend to break and to slip with respect to the core.
• the yarn is a ring spun yarn and has a good look and good to excellent mechanical characteristics, in particular the yarn is suitable for workwear and medical garments.
• An aim of the present invention is thus to provide a yarn in which all the cotton fibers are recycled, short length, cotton fibers and that has good to excellent mechanical properties and the look and aspect of a yarn obtained from virgin cotton fibers.
• Another aim of the invention is to provide a yarn reaching the above mentioned scope, that is easily woven in a fabric that can withstand repeated washings in hard conditions and that is suitable for work-wear garments and for medical fabrics and medical garments.
• Another aim of the invention is to provide a core spun yarn containing short length cotton fibers that is elastic and stretchable.
• the present invention relates to a yarn and a relevant production method according to the enclosed independent claims, while preferred aspects are recited in the dependent claims.
• blend of fibers in the present description is used to identify a mixture of different fibers that is suitable to be used in a ring spinning process to provide the sheath of a core spun yarn.
• Single fibers in the sheath of the invention yarn can be identified and physically removed from the blend forming the sheath to be tested if required.
• the term "virgin fiber” indicates cotton staple fibers deriving from cotton that has a high average length of the fibers e.g. because it has not been recycled from yarns and fabrics.
• natural cellulosic fibers indicates fibers obtained from plants.
• Preferred natural cellulosic fibers are fibers as obtained or as obtainable from the recycling process of fabrics and fibers coming from plants such as cotton, hemp, linen and so on.
• natural cellulosic fibers used in the invention are recycled fibers, having count similar to each other.
• recycled cotton fibers indicates staple fibers of cotton deriving from the mechanical treatments, e.g. opening and sorting, of yarns and fabrics; a possible way to identify these fibers is by measuring their average fiber length.
• the fiber average length L(n), as measured with DIN 53805:1980-06, is in the range of 6 to 16 mm.
• synthetic fiber indicates artificial fibers, in particular fibers made from polymers synthesized from chemical compounds - see definition in ASTM D123, option (1) of "manufactured fiber". Synthetic fibers are thus are polymeric non-cellulosic fibers. Synthetic fibers are usually produced in filament (i.e. continuous) form. Synthetic staple fibers are commercially available and can be obtained by cutting the synthetic filaments. Preferred synthetic staple fibers are selected from polyester and polyamide, preferably they are polyester fibers.
• the polyester for the staple fibers is a selected from a semi-dull, dull or full-dull polyester; these polyester are known and commercially available, e.g. they contain TiO 2 to make the filament dull.
• the polyester filaments for the staple fibers are not texturized.
• the yarn is a core spun yarn having a core comprising or consisting of polyester filaments.
• the total linear density of the polyester filaments is in the range of 20 to 300 denier.
• the number of filaments is in the range of 6 to 288, while the total count for the final yarn is in the range of 5/1 to 60/1 Ne.
• the ratio by weight of the polyester filaments to the total weight of the yarn is in the range of 30% to 70%, preferably 40% to 60%.
• a yarn comprises a filament core and a staple fiber sheath.
• the fiber sheath is made of first and second fibers.
• the first fibers are natural cellulosic fibers, preferably cotton staple fibers having an average length in the range of 6 to 16 mm, even more preferably about 10 mm. These are the typical average lengths of recycled cotton fibers.
• the second fibers are synthetic fibers, i.e. polymeric, non-cellulosic fibers.
• the second fibers are made from polyester or polyamide.
• the preferred average length for the second fibers is greater than average length of the first fibers, preferably the length is in the range between 25 mm and 40 mm, more preferably between 28 mm and 36 mm.
• High quality yarns have been achieved in particular with second fibers around 32 mm, such as in the range between 30 and 34 mm.
• At least 95% of the fibers of the sheath are the above-mentioned first and second fibers, wherein the weight ratio of the first fiber to the second fibers is between 65/35 by weight to 35/65 by weight, preferably said ratio being in the range 40/60 by weight to 60/40 by weight.
• first fibers are about 50% by weight of the blend and the second fibers are 50% by weight of the blend.
• the blend of the fiber sheath as well as the presence of one or more polyester filaments in the core provides for the claimed fibers and filament to be workable into a yarn that is, in turn, workable into a fabric that has excellent properties on the market.
• the resulting yarn can be ring spun, that is a process that was previously not possible to perform in yarn having a high percentage of short fibers, such as recycled cotton fibers.
• the elongation at break of the polyester filaments of the filament core is between 5% and 15%, preferably between 5% and 12%, even more preferably between 10 and 12%, when tested with DIN ISO 2062.
• the claimed elongation at break is the elongation of all the filaments of the core, tested together.
• the elongation of the core is low (i.e. less than 15% measured by DIN ISO 2062 as above discussed), the yarn production and the weaving processes are easier and much more efficient.
• the elongation of the core is usually similar to the elongation of the sheath.
• a high elongation (i.e. more than 15% or more than 20%) polyester core may cause slippage of the sheath from the core and cause a breakage in the staple fiber sheath while the core filaments do not break.
• Low elongation polyester filaments are known in the art and are commercially available. They may be obtained in different ways.
• a possible solution may be to provide a draft during a texturing step of POY polyester filaments. Such a draft is preferably between 1.7 and 2.5, more preferably between 1.8 and 2.1.
• polyester filaments are in fact preferably textured and, as mentioned, draft can be applied during texturing process, usually by also heating the filaments during the drafting step in the texturing process.
• the amount of the polyester filaments of the core is between 30% and 70% of the weight of the yarn, more preferably between 40% and 60%.
• the above percentage relates to the total count of polyester filaments, i.e. to the total sum of the count of the filaments.
• the total count of the polyester filaments is between 50 and 300 den, more preferably between 80 and 200 den, even more preferably between 100 and 150 den.
• the second fibers of the sheath have an average length that is greater than the average length of the first fibers.
• the average length of the second fibers is more than 200% than the average length of the first fibers, preferably more than 250% of the length of the first fibers.
• the ratio of average length of the second fibers to the average length of the first fibers is preferably greater than 2.0, preferably greater than 2.5.
• the fiber length can be measured via suitable machines such as Uster Afis Pro 2 or TexTechno FCS-Fibro test, with methods know in the art such as, AFIS (advanced fiber information system) according to DIN 53805:1980-06, or ASTM D1447.
• suitable machines such as Uster Afis Pro 2 or TexTechno FCS-Fibro test, with methods know in the art such as, AFIS (advanced fiber information system) according to DIN 53805:1980-06, or ASTM D1447.
• the sheath In order to detect the fiber nature and measure the fiber length of the first and second fibers in the sheath of a finished yarn, the sheath should be initially separated from the core and de-structured into a plurality of fibers. This can be done e.g. via un-twisting the yarn (i.e. applying a twist opposite to the one of the yarn, such as S-twisting a Z-twisted yarn). This can be done manually or by a twisting machine. Subsequently, the fibers length can be tested e.g. via DIN 53805 or ASTM D1447, via an USTER AFIS PRO 2 or a Textechno FCS-Fibrotest. In a histogram of the fibers the amount of short fibers can be detected; similarly synthetic staple fibers generally always have substantially a same length so that they can be seen in histograms
• the first fibers can be separated from the second fibers via known chemical or biological methods.
• known methods can be used to dissolve the synthetic fibers, while leaving substantially intact the first fibers, in particular when the first fibers are cotton fibers and the second fibers are polyester or polyamide fibers.
• Fibers may be also manually separated to be tested.
• Properties such as the length, of the first fibers or the second fibers can thus be tested.
• the length of the second fibers is not too much greater than the length of the first fibers.
• a preferred ratio L(n) second /L(n) first between the average length L(n) of the second fibers versus the average length L(n) of the first fibers is between 1.5 and 3.8, more preferably between 2 and 3.5. The best results have been found to occur when the above discussed ratio is between 2.5 and 3.3.
• the yarn according to one or more of the preceding aspects can be used to produce a fabric, in particular a woven fabric and a garment comprising such a woven fabric. It is in particular possible to produce a fabric wherein yarns according to the invention are used both in warp and weft direction.
• such a fabric, and in particular a garment made from such a fabric can be made without using virgin (i.e. conventional) cotton, while having similar wearability properties (hand, softness, etc.) as well as optical properties (brightness, dyeability, etc.) with respect to a fabric made from conventional cotton yarns.
• the fabric according to the present invention shows similar mechanical properties, such as similar tensile strength, as well as better abrasion properties.
• a fabric made of yarns according to the invention can be effectively used in the production of apparels in the field of workwear and medical industry garments.
• the core may consist of a plurality of polyester filaments, in embodiments the core may comprise also one or more elastic filaments.
• elastolefin fibers are used as elastic filaments in order to withstand the heavy industrial washing cycles to which work apparels and medical apparels are subjected.
• Preferred elastolefin fibers are known and commercially available in the market as XLANCE.
• the elastolefin filaments are usually in the range of 30 to 160 den, preferably in the range 40 to 140 den; said filaments are usually drafted at least 2.0 times, more preferably about 3.0 times before the sheath is applied, so that their count in the yarn would be smaller (with a 3.0 draft the dimensions would be between about 13 and 47 den).
• the elastolefin filaments have a draft between 2.0 and 4.0, more preferably of at least 2.5, most preferably of about 3.0.
• the draft of the elastolefin filament(s) is greater than 4.0, preferably comprised between 4.0 and 6.0, more preferably comprised between 4.0 and 5.0.
• the present invention also relates to a method for producing a yarn comprising the steps of: a) Selecting a filament core, comprising a plurality of polyester filaments; b) Selecting first fibers that are natural cellulosic fibers; c) Selecting second fibers that are synthetic fibers, preferably polymeric non-cellulosic fibers; d) Providing a staple fiber sheath, comprising at least 95% by weight of a blend of said first fibers and said second fibers, wherein the weight ratio of said first fibers to said second fibers is in the range of 65/35 to 35/65, preferably said ratio being about 50/50; combining said filament core and said staple fiber sheath, via ring spinning so as to obtain a core-sheath yarn.
• the present invention also relates to a method for producing a yarn comprising the steps of: a) Selecting a filament core, comprising a plurality of polyester filaments, wherein the elongation at break of the polyester filaments of the filament core, measured according to DIN ISO 2062, is in the range of 5% to 15%, more preferably between 10% and 12%; b) Selecting a staple fiber sheath wherein at least 95% of the sheath is made of first fibers and second fibers, said first fibers being natural cellulosic fibers, preferably having an average length between 6 and 16 mm, said second fibers being synthetic filaments, preferably having an average length greater than said first fiber and preferably between 25 and 40 mm.
• recycled materials are preferably used, so that the first fibers of the sheath are recycled cotton fibers and/or the polyester filaments is made from recycled polyester.
• dyeing is carried out in a single bath, wherein both the dyes for the cotton fibers and for the synthetic fibers are present.
• the above discussed process provides for a good quality and uniform dyeing of the yarn, even if part of the sheath is made of polyester filaments.
• the fabric is stabilized, usually during sanforizing, by passing along rolls that are curved, i.e. arched.
• the rolls will impart a different force (at least with different directions) to different parts of the fabric.
• a twisting (torque) force is applied to the fabric, that prevents, or at least limits, movement of the yarns that tend (in particular in diagonal weaves, such as twill), to impart a shear force to the final fabric, thus causing a movement of one lateral end of the fabric with respect to the other in warp direction.
• a yarn comprises a core provided with polyester filaments, and possibly also with elastolefin filaments; the sheath is made of staple fibers, comprising recycled cotton fibers and polyester fibers.
• the core polyester filaments are usually within 20% to 70% of the total weight of the yarn, usually between 30 and 60% of the yarn.
• the total count of the polyester filaments is typically between 20 and 300 den, while the most preferred embodiments use a total amount of polyester that is between 100 and 150 den.
• the elongation at break of the polyester filaments is between 5 and 15%, more preferably between 8% and 12%, even more preferably between 10% and 120%.
• the test for elongation at break measurement is DIN ISO 2062.
• a traditional polyester yarn initially produced with the same method but without the claimed draft, will be heavier (i.e. as having a bigger count) and a greater elongation at break when tested with the same test, above 15%, usually in the range of about 17% - 25%.
• Elastolefin filament(s), if present, is usually highly drafted (with a draft of more than 2.0, usually greater than3.0, possibly between 4.0 and 6.0), and is present in low weight amount in the yarn, and is thus usually about 5 to 15% of the total weight of the yarn. It has been found that high draft (greater than 4.0) reduces the occurrence of breakings and thus provides for an easier working of the elastolefin into a yarn, and an easier weaving of the yarn comprising elastolefin filament(s) into a fabric.
• the core polyester filaments and the elastolefin filaments are combined together at least at a plurality of connecting points, in a known way, and preferably by means of intermingling, twisting or mechanical co-extrusion.
• the elastolefin filaments are preferably drafted before being combined with the core polyester filaments.
• the core polyester filaments and the elastolefin filament(s) are connected together in a continuous or substantially continuous way by "mechanical co-extrusion" of the filaments, preferably in a tensioned condition.
• mechanical co-extrusion also known as co-feeding
• two (or more) bundles of fibers (in a tensioned state) are forced (fed together) through a restriction where the fibers attach together to such a degree that they remain attached also after exiting the restriction.
• the sheath is composed of staple fibers. At least 95% of the staple fibers of the sheath are a blend of recycled cotton fibers 35% to 65% by weight of the blend being made of the recycled cotton fibers, while the other fibers of the blend are synthetic fibers.
• Preferred embodiments have about 50% of recycled cotton fibers and 50% of synthetic fibers. The remaining portion (up to 5%), if present, may be other staple fibers.
• the average length of the recycled cotton fibers is between 6 and 16 mm.
• more than 90% (in number) of the recycled cotton fibers are below 30 mm.
• Embodiments are possible where 50% of the fibers is below 15 mm.
• the synthetic fibers are longer than the recycled cotton fibers, in order to provide strength to the sheath. However, as mentioned, it is preferred that they are not too much longer than the recycled cotton fibers, in order to promote coupling and blending of the fibers of the sheath.
• the synthetic fibers have an average length greater than 25 mm, preferably greater than 30 mm, usually between 28 mm and 36 mm. In particular, it has been noted that too long synthetic fibers may lower the quality of the final yarn. In view of that, the most preferred embodiments use around 32 mm synthetic fibers, such as e.g. between 30 mm and 34 mm.
• synthetic staple fibers have uniform length, being produced via cutting of synthetic filaments.
• the synthetic fibers are preferably chosen so that their average length is between 1.5 times and 3.8 times the average length of the recycled cotton fibers, preferably between 2 and 3.5 times, even more preferably between 2.5 and 3.3 times the average length of the recycled cotton fibers.
• Preferred synthetic fibers are polyester and polyamide fibers more preferably polyester fibers.
• High tenacity synthetic fibers are fibers, preferably polyester staple fibers, having tenacity greater than 6 g/den, preferably greater than 7 g/den, more preferably greater than 8 g/den.
• High tenacity synthetic staple fibers can be obtained via cutting a high tenacity synthetic filament into multiple parts (i.e. fibers), the synthetic filament having tenacity greater than 6 g/den, preferably greater than 8 g/den. In addition to that, the tenacity is also usually equal to or lower than 10 g/den.
• the synthetic fibers In order to test the tenacity of the synthetic fibers, they can be first isolated from the cotton fibers, e.g. via mechanical separation or via degradation (via enzymatic process), and subsequently tested with machine and methods known in the art.
• the synthetic fibers and the recycled cotton fibers are mixed to form a blend that is at least 95% by weight of the fibers of the sheath; preferably the blend is 100% by weight of the sheath, i.e. the sheath consists of such a blend.
• the ratio (in weight) between the synthetic fibers and the recycled cotton fibers is in the range between 35/65 and 65/35.
• the production method of the yarn according to the present invention comprises providing a core, by drawing polyester filaments, and possibly combining them with elastolefin filaments.
• the core is then combined with the sheath, that is usually provided in form of one or more rovings of staple fiber.
• Synthetic staple fibers can be obtained by cutting a continuous filament, e.g. a polyester or polyamide filament.
• the original filament has a tenacity greater than 6 g/den, preferably greater than 8 g/den.
• a suitable way of measuring tenacity is by applying ASTM D3822.
• the obtained product is then spun into a yarn, preferably via ring spinning.
• the obtained yarn can be used in a textile article and in particular, a plurality of yarns according to the invention can be used in a fabric for an article in the workwear of medical industry field. In particular they can be used as warp and/or weft yarns of the fabric.
• dyeing is carried out in a single bath, wherein both the dyes for the natural cellulosic fibers and for the synthetic fibers are present.
• dyeing is preferably carried out in a single bath when the sheath comprises a blend of cotton and polyester fibers.
• a single bath comprising VAT dyes (e.g. indanthrene) and disperse dyes to dye at the same time the cotton staple fibers and the polyester staple fibers of the sheath of the yarn.
• the yarns can be dyed before or after being part (e.g. by weaving) of a fabric.
• a fabric wherein all the warp and weft yarns are yarns according to the invention.
• a preferred embodiment is provided with warp yarns without elastolefin filaments, and weft yarns with elastolefin filament(s).
• embodiments of fabrics wherein no yarn is provided with elastolefin filaments, or wherein both warp and wedt yarns are provided with elastolefin filaments are howevere within the scope of the invention.
• a fabric obtained with the yarns according to the present invention is provided with improved abrasion performances with respect to fabrics made with standard cotton yarns and recycled cotton yarns.
• Fiber composition and length can be tested according to the above discussed methods. They can be tested both before being woven, and after being woven, by removing them from a fabric, with similar results.

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• Engineering & Computer Science (AREA)
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• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Woven Fabrics (AREA)
• Spinning Or Twisting Of Yarns (AREA)

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  • 2025-04-18 EP EP25171481.2A patent/EP4640931B1/de active Active
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  • 2025-04-18 WO PCT/EP2025/060793 patent/WO2025224029A1/en active Pending
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