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
  • D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
  • D02G3/404—Yarns or threads coated with polymeric solutions
• • 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
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/564—Polyureas, polyurethanes or other polymers having ureide or urethane links; Precondensation products forming them
• • 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
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/59—Polyamides; Polyimides
• • 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
  • D10B2401/12—Physical properties biodegradable

Definitions

• the term recyclable refers to a material that can be used again in production processes
• biodegradable refers to a material that can decompose into simpler chemical compounds through the action of microorganisms, sunlight or other natural atmospheric agents.
• Synthetic fibers on the other hand, have significant disadvantages in terms of environmental impact as they degrade in the environment only after decades.
• the present invention relates to a composite yarn (F) comprising:
• biodegradation is the decomposition or transformation of a material into products such as water, carbon dioxide, methane and biomass through the action of microorganisms (e.g. bacteria and fungi), sunlight or other natural atmospheric agents.
• Biodegradation can take place aerobically (in the presence of oxygen) or anaerobically (in the absence of oxygen).
• the biodegradation agent is preferably selected for promoting only anaerobic degradation. In this way, the degradation of the yarn does not take place (or is however significantly slowed down) during the normal period of use of the yarn (for example the normal period of use of a garment).
• the biodegradation agent can help microorganisms to break down the polymer at a significantly faster rate.
• the biodegradation agent for example, can enable microorganisms to break the first C-C bonds within the polymeric material (with the formation of smaller constituents such as oligomers and monomers). In this way, it is possible to increase the surface area of the polymer exposed to attack by microorganisms (which can in fact also become inserted inside the openings of the polymer and not act exclusively on the external surface of the yarn).
• the biodegradation agent can reduce the lipophilicity of the coating layer (thanks, for example, to the presence of suitable functional groups such as hydroxyl groups) and promote the hydrolysis process, thus allowing the biodegradation process to be accelerated.
• Possible aromatic polyesters compatible with the present invention can, for example, be polyethylene terephthalate and polybutylene terephthalate.
• Possible monosaccharides compatible with the present invention can for example be glucose, galactose, mannose, allose, altrose, gulose, idose, talose and mixtures thereof.
• said biodegradation agent comprises at least:
• said biodegradation agent comprises at least:
• said biodegradation agent comprises at least polylactic acid and glucose.
• the core yarn (FC) can comprise:
• the core yarn (FC) comprises a fiber of a natural origin or deriving from a biodegradable material of a natural origin
• the core yarn (FC) comprises a fiber of a natural origin or deriving from a biodegradable material of a natural origin
• This natural fiber can be obtained from plants (such as flax, hemp, cotton and viscose) or derive from materials of an animal origin (such as, for example, wool and silk).
• the core yarn (FC) can also alternatively comprise a bio-based polymer of a biodegradable type (such as, for example, polylactic acid - PLA, polybutylene succinate - PBS and polyhydroxyalkanoates - PHAs, including for example polyhydroxybutyrate - PHB).
• a biodegradable type such as, for example, polylactic acid - PLA, polybutylene succinate - PBS and polyhydroxyalkanoates - PHAs, including for example polyhydroxybutyrate - PHB.
• the core yarn (FC) when the core yarn (FC) comprises a synthetic fiber, it can also comprise a biodegradation agent to further enhance the biodegradability of the composite yarn (F).
• Said biodegradation agent can comprise for example one or more of the following components:
• the coating layer (FR) that covers said core yarn (FC) comprises a polymer that is non-biodegradable in itself (FSR).
• Said polymer can be any synthetic polymer or bio-based polymer (i.e. a polymer obtained from renewable natural sources such as algae, bacteria, microorganisms, plants, etc.) that is non-biodegradable in itself and compatible with the textile sector, for example polyurethane (PU), polyamide (PA), co-polyamide (Co-PA, for example low-melt co-polyamide), polyester, co-polyester, ethyl-vinyl acetate, polypropylene, polyethylene, bio-based polyethylene, bio-based polyethylene terephthalate, bio-based polyamide, bio-based polyurethane.
• a thermoplastic elastomer for example polyester-based - TPE, polyester-polyether - TPC-ET or thermoplastic polyurethane - TPU) can also be used.
• said biodegradation agent is present in a quantity ranging from 0.1 to 10%, more preferably from 0.25 to 3%, by weight with respect to the total weight of said coating layer (FR).
• said core yarn (FC) comprises a fiber selected from viscose, cotton, wool, linen, silk and hemp and said coating layer (FR) comprises polyurethane (more preferably thermoplastic polyurethane).
• Polyurethane in fact imparts excellent resistance to abrasion and UV rays.
• the selection between the fiber contained in the core yarn (FC) and the polymer contained in the coating layer (FR) derives mainly from the characteristics required for a given application and can be independently carried out by skilled persons in the field on the basis of common knowledge in the sector according to the specific needs to be satisfied.
• a woven fabric used in furnishing which must have a rather stiff yarn
• the yarn (F) according to the present invention can have different surface finishes, shiny or opaque, smooth or rough. Furthermore, the section of the yarn (F) according to the present invention can be circular, rectangular or with any kind of geometric sections (for example hexagonal, octagonal, oval, etc.).
• the coating layer (FR) can be transparent, opaque or coloured with special pigments and/or powders.
• the resulting mixture is used for coating the core yarn (FC) using processes known in the field, such as extrusion or dip coating (also known as immersion coating).
• the production of the core yarn (FC) to be coated can be effected using techniques known in the industry.
• the polymeric material for example, can be melted (preferably directly inside the extruder) and with the addition of the biodegradation agent (which can be in liquid and/or solid form).
• the biodegradation agent can be present in a quantity ranging from 0.1 to 10%, more preferably from 0.25 to 3%, by weight with respect to the total weight of said coating layer (FR).

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Mechanical Engineering (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

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Publications (1)

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Citations (3)

• 2025
  • 2025-03-28 EP EP25166923.0A patent/EP4624645A1/fr active Pending

Patent Citations (3)

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