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
  • 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
  • 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
• • 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
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
• • 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
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
  • Y10T428/2913—Rod, strand, filament or fiber

Definitions

• the present invention relates to a composite yarn for technical or industrial use, which can be assembled into all types of textile structures, in particular appropriate textile tablecloths, to meet any particular application or specification, for example for the manufacture of blinds or curtains. More particularly, the invention relates to composite yarns capable of being obtained by coating.
• a core comprising a continuous wire, in particular in inorganic material such as glass, or organic material such as polyester, polyamide, polyvinyl alcohol, and
• a sheath or envelope comprising a matrix, consisting of at least one chlorinated polymeric material, for example a polyvinyl chloride (PVC), a flame retardant mineral filler incorporated and distributed in said matrix, and a plasticizer.
• a chlorinated polymeric material for example a polyvinyl chloride (PVC)
• PVC polyvinyl chloride
• a flame retardant mineral filler incorporated and distributed in said matrix
• plasticizer e.g., but not exclusively, such a wire is obtained by coating in one or two layers, the core with a plastisol comprising the chlorinated polymeric material, for example polyvinyl chloride, and the plasticizer, then by gelation of the plastisol. around the soul.
• various documents have proposed various compounds or various compositions, capable of improving the fire behavior of the plastic matrices in which the flame retardant filler is incorporated, without the application or setting form of the flame-retardant plastic, for example in the form of a wire, is specified.
• a flame retardant filler comprising a chlorinated polyethylene, a compound chosen from in particular the oxides and / or hydroxides of antimony, and of aluminum, and preferably another compound chosen from certain zinc salts, including zinc borate; products based on tin, for example zinc stannate.
• the subject of the present invention is a coated composite wire, having an overall and intrinsically improved fire behavior, promoting heat dissipation and making it possible to greatly reduce the random phenomenon of flame propagation measured by fire tests according to the standard.
• the temperature resistance properties are improved due to the regular distribution of the fibers in the polymer coating material which allows heat dissipation, in fact when the fibers are grouped together they constitute a preferential conduction path which promotes the propagation of the heat.
• the subject of the present invention is a composite yarn consisting of a continuous yarn, obtained by spinning fibers of an organic or inorganic material or of natural fibers such as linen or cotton, and of a polymer material, characterized in that the constituent fibers of said continuous yarn are distributed uniformly in said polymeric material so that each of said fibers is coated by said polymeric material.
• This composite wire can be used alone or as a core for the manufacture of composite wires obtained by a second coating with a polymeric material.
• the present invention also relates to a coated composite yarn capable of being obtained by a coating process with a polymeric material, characterized in that it comprises a core constituted by a composite yarn as defined above and in that the polymer material formed around the core and the polymer material constituting the core are of the same nature.
• this composite yarn can be used as a core for the manufacture of flame retardant composite yarns obtained by coating with polymers containing flame retardant fillers. Yarns are thus obtained which, overall and intrinsically, exhibit improved fire behavior by using less flame retardant filler.
• the present invention also relates to a coated flame retardant composite yarn capable of being obtained by a coating process with a polymer material comprising a flame retardant filler, characterized in that it comprises a core constituted by a composite yarn as defined above and in that the polymer material constituted around the core and the polymer material constituting the core are of the same nature.
• said coating is capable of being carried out with a liquid preparation of monomer or of polymer, for example a liquid preparation of polymer is obtained by melting a polymer or by dispersion, for example in the form of plastisol, and for example a liquid monomer preparation consists of a liquid monomer which will polymerize under the effect of heat or by irradiation, for example UN irradiation.
• the invention also relates to the process for manufacturing a composite thread, characterized in that a continuous thread, obtained by spinning fibers of an organic or inorganic material or of natural fibers, is subjected to a process of mechanical opening of the thread allowing the separation of said fibers, simultaneously or prior to its coating with a polymeric material.
• It also relates to the process for manufacturing a composite thread, characterized in that a continuous thread, obtained by spinning fibers of an organic or inorganic material or of natural fibers, is subjected to a process of mechanical opening of the thread allowing the separation of said fibers, simultaneously or prior to a primary coating with a liquid preparation of monomer or polymer in the liquid state, and in that the composite yarn obtained is subjected to a second coating with a liquid preparation of monomer or polymer.
• the monomer or polymer of the second coating is of the same nature as the monomer or polymer of the first coating.
• a fireproof composite yarn characterized in that a continuous yarn, obtained by spinning fibers of an organic or inorganic material or of natural fibers, is subjected to a process of mechanical opening of the yarn. allowing the separation of said fibers, simultaneously or prior to a primary coating with a liquid preparation of monomer or polymer in the liquid state not comprising no flame retardant filler, and in that the composite yarn obtained is subjected to a second coating with a liquid preparation of monomer or polymer in the liquid state comprising a flame retardant filler.
• mechanical opening any process allowing the fibers to be opened simultaneously or prior to coating, such as coding, by the application of an air jet, a water jet, a treatment by ultrasound, the application of mechanical pressure, for example a crushing of the wire or any process making it possible to spread the fibers to allow the penetration of the polymeric material inside the fibers constituting said wire.
• the yarn according to the invention does not exhibit any of the stripping and shading phenomena observed with the yarns of the prior art.
• liquid preparation of monomers or polymers is meant any liquid formulation based on monomers or polymers.
• formulation is meant any mixture comprising at least one product, for example dispersion, solution, mixture of monomers and / or oligomers.
• polymer dispersion any preparation of polymer in the divided state comprising additives in an organic or non-organic liquid.
• plastisol is meant a dispersion of polymers, fillers and other additives, in the finely divided state, in a plasticizer.
• polymeric material use may be made of chlorinated polymers, silicones, polyurethanes, acrylics, ethylene-vinyl acetate EVA copolymers, terpolymers of ethylene propylene diene monomer, EPDM.
• chlorinated polymeric material it is possible to use, in accordance with the invention, any PVC resin capable of being plasticized, and in particular able therefore to be used in the form of plastisol.
• chlorinated polymeric material is meant either a pure chlorinated polymer or a copolymer of vinyl chloride copolymerized with other monomers, or a chlorinated polymer which is alloyed with other polymers.
• olefins such as, for example, ethylene, vinyl esters of saturated carboxylic acids, such as vinyl acetate, vinyl butyrate or maleates; halogenated vinyl derivatives such as, for example, vinylidene chloride, esters of acrylic or methacrylic acid such as butyl acrylate.
• chlorinated polymer By way of chlorinated polymer, mention may, for example, be made of polyvinyl chloride but also superchlorinated PVCs, polyvinylidene chlorides and chlorinated polyolefins.
• the chlorinated polymer material according to the present invention has a halogen content by weight of between 40 and 70%.
• silicone polymer material organopolysiloxanes and more particularly resins and elastomers of polysiloxane with or without diluent can be used according to the invention.
• polyurethane polymer material one can use according to the invention any material consisting of a hydrocarbon chain comprising the urethane or -NHCOO- unit.
• the continuous thread it is itself constituted by one or more continuous filaments or fibers.
• Its chemical nature may be organic, for example polyester, polyamide, polyvinyl, acrylic, of natural origin such as linen or cotton, or inorganic, for example of glass or silica, it being understood that its melting temperature must be higher than that of implementation of the polymer material
• the flame-retardant filler is chosen from the group consisting of zinc borate, aluminum hydroxide, antimony trioxide and zinc hydroxystannate, molybdenum compounds, halogen derivatives, active halogen compounds, phosphorus compounds and intumescent systems.
• fillers can be incorporated and distributed in the liquid preparation of monomers or polymers, in addition to the flame-retardant filler, for example a pigmentary filler, silica, talc, glass beads and / or a stabilizing filler.
• a pigmentary filler silica, talc, glass beads and / or a stabilizing filler.
• the composition total weight of the composite yarn, in inorganic matter is obviously modified or affected.
• plasticizers for example comprising at least one phthalate, and therefore not to compromise the processing properties of the wire, with regard to its subsequent weaving.
• the invention also makes it possible to limit the flame-retardant charge by weight, in proportions not exceeding 50% of the plastic matrix. Beyond this there is an alteration in the properties, in particular mechanical properties, of the composite wire.
• Figure 1 shows in section a flame retardant composite wire of the prior art.
• Figure 2 shows in section a flame retardant composite wire according to the invention.
• the homogeneous distribution of the fibers 1 is observed in the preparation of monomer or polymer 2 applied in the liquid state and cooled or polymerized after application.
• the secondary coating 3 is also regularly distributed in the composite yarn according to the invention.
• the take-up rate is the rate of impregnation of the wire, it is defined by the following formula: weight of the coated wire - weight of the wire x 100 weight of the coated wire
• ILO represents the Oxygen Limit Index, it is determined according to standard NF G 07128.
• Resins a. pvc resin
• Stabilizers a. Pb-based thermal stabilizer (Baerostab V 220) (BAERLOCHER) based on Organic Barium Salts Zinc (Lastab DC 261 GL (LAGOR), Mark BZ 561 (WITCO)) based on Thio Tin (Baerostab M62 A (BAERLOCHER) ) b. UV stabilizer
• Benzotriazole or benzophenone (Tinuvin 320, Tinuvin 571, Tinuvin P (WITCO)) Charges:
• Opacifying fillers Zinc sulfide, ZnS (sachtolit L (SACHTLEBEN)), Titanium dioxide (KRONOS) Flame retardants:
• Zinc Borate (Firebreak ZB (USBORAX))
• Aluminum hydroxide (Alumina SH 5) (OMYA)
• Antimony hydroxide Antimony oxide / Timonox
• SICA Antimony oxide / Timonox
• Zinc Hydroxystannate (StormFlam ZHS (JOSEPH STOREY) Additives: Viscosity modifiers / rheological agents: Viscobyk-4013,
• the glass promoting heat dissipation the phenomenon of flame propagation encountered during fire tests according to standard NF 92503 on fabric, is with a fabric obtained by weaving a flame retardant wire according to the invention, greatly reduced because the polymer material is better distributed in the core of the fibers and the stored heat is then better dissipated by the fibers.
• the coating formulation is defined by a viscosity of between 500 and 10,000 mPa.s and preferably between 1,000 and 5,000 mPa.s, measured at 25 ° C with a Brookfield RVT viscometer at 20 rpm, pin 4.
• the coating is carried out with a formulation comprising the following products:
• Solvent / water 0 to 50 pcr Fillers (pigment, flame retardant ..) 0 to 20 pcr
• the silicones used are for example:
• Silicolease UV Poly 200 and UV cata 211 from RHODIA are chosen from toluene, xylene, white spirit or water.
• the fillers consist for example of zinc borate
• Firebreak ZB aluminum hydroxide (OMYA), alumina SH5n promoter comm Elastosil 45568 VP or HF86 (WACKER), retarder HTV-SB
• WACKER water repellant WS60E
• SOVITEC glass beads
• the silicones used are crosslinkable to UV.
• the fabrics obtained with a composite yarn according to the invention do not need a subsequent treatment to improve their fire behavior.
• a composite yarn according to the invention has no defibrillation when cut, it is more hydrophobic, its feel is “softer", and the textiles obtained by weaving are anti-fouling.
• a composite yarn according to the present invention can be integrated into any textile structure, or assembled according to any required textile structure, two-dimensional (tablecloths, fabrics, etc.) or three-dimensional (braids for example).
• the composite yarn can firstly be cut and divided into elementary yarns, which can be intertwined and fixed to each other, in the form of non-woven textile structures, for example matt.
• the fixing of the intermingled elementary wires can be obtained by impregnation with an appropriate adhesive substance, or by thermofusion of the polymer material of the sheath.
• the composite yarn can then be assembled on itself, in any suitable knitted textile structure, but it can be assembled with other yarns, according to the present invention or not, to constitute different two-dimensional or three-dimensional structures; in the latter case, it may be grids in which the threads according to the present invention are intertwined and fixed with other threads, according to the present invention or not, and fabrics, in which the composite threads according to the invention are woven with other warp and / or weft threads, also according to the invention or not.
• a very particular application of the present invention relates to obtaining technical fabrics, intended for the realization or manufacture of blinds or curtains both inside and outside.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Woven Fabrics (AREA)
• Reinforced Plastic Materials (AREA)
• Superconductors And Manufacturing Methods Therefor (AREA)

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• 2001
  • 2001-12-28 FR FR0117047A patent/FR2834302B1/fr not_active Expired - Fee Related
• 2002
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• 2005
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