Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
  • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
  • D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic 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
  • D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
  • D02G3/12—Threads containing metallic filaments or strips
• • 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
  • D02G3/449—Yarns or threads with antibacterial properties
• • 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
  • D10B2401/13—Physical properties anti-allergenic or anti-bacterial
• • 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
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3179—Woven fabric is characterized by a particular or differential weave other than fabric in which the strand denier or warp/weft pick count is specified
  • Y10T442/322—Warp differs from weft
  • Y10T442/3228—Materials differ
  • Y10T442/326—Including synthetic polymeric strand material

Definitions

• the invention relates to a composite yarn.
• the invention also relates to a textile obtained with the composite yarn, used alone or in combination with other textile materials.
• the invention also relates to an article of clothing or packaging made from this composite yarn.
• a textile has a protective coating function for packaging, covering and protecting living or inert materials against the main factors detrimental to their safety.
• Textiles provide protection against biological aggressions, such as bacteria, fungi, yeasts, viruses, allergens, algae, against chemical attacks, such as gases, fumes, dust, against physical aggression , such as radiation, hot or cold air, moisture and against mechanical aggression, such as friction, shock, punctures and cuts.
• a yarn is a basic constituent of a textile and has characteristics of flexibility, fineness, great length relative to its diameter.
• Copper, zinc and silver in metallic form are strongly biocidal or germicidal, by action against germs such as bacteria, yeasts and fungi, and algicides by action against algae, according to a particular mechanism called "oligodynamic effect". These metals are almost insoluble in water.
• the growth of these microorganisms or algae is inhibited by biocidal action.
• the bacterial cells are bacteriostatic because they are rendered sterile and can no longer divide. As a result, the bacterial population does not multiply anymore. State of the art
• the antibacterial activity of copper is limited to Staphylococcus and Streptococcus (Gram +). Copper-based compounds and in particular copper sulfate are especially endowed with antifungal properties. Copper is active on fungi such as Trichophyton interdigital or Trichophyton gypseum. Copper is inactive against other filamentous fungi such as Aspergillus niger. Antibacterial activity is more important on Gram-positive bacteria than Gram + bacteria.
• one technique consists of enriching textiles with active agents. These agents are added to the fibers, yarns and / or textile. To date, there are various antimicrobial, antibacterial and antifungal agents widely used in this field.
• minerals or zeolites for example tectosilicates, aluminosilicates, calcium or alkali
• metals such as mainly copper, silver and zinc. They are incorporated in fibers obtained by molten route.
• the ceramic based on zirconium phosphate and silver marketed under the name of AlphaSan® RC 5000.
• These agents are also added to the surface of several fibers. These are for example a filament of Polyamide 6-6, known under the name X-static TM, marketed by the company Noble Fiber Technology. These mineral treatments are suitable for textiles having high melting temperatures above 250 ° C, such as polyamides, polyesters.
• Triclosan is an agent with a broad spectrum of antibacterial and antimicrobial activity. Triclosan can only be used in materials with a melting point below 215 ° C.
• chitosan is a natural polymer derived from chitin used in health applications, agriculture, as well as as a dyeing aid for fabrics. It also cleans and whitens pool water, eliminating algae and other impurities.
• part of the active ingredient incorporated in the polymer must be on the surface. Depletion of the active ingredient due to dyeing, abrasion, extraction by sweat or cleaning products must be compensated for by slow migration through the filament or fiber to the surface.
• the mass concentration of the active ingredient, its distribution, mobility in the polymer and the diameter of the filament or fiber are therefore important parameters.
• the textiles obtained by finishing have a better resistance to maintenance than textiles having undergone a simple deposition without binder.
• binder will modify the surface properties of the fibers, the binding of the fibers together and therefore the properties of the fabrics (flexibility, feel and appearance) and will partially mask the effectiveness of the biocide molecules.
• the durability of these treatments depends on many factors, the main one being the strength of the attachment of the active ingredient to the surface of the fibers with respect to dyeing conditions, abrasion and washes.
• the main problem to be solved by the invention is to make a wire preventing the development of bacteria, fungi, algae or other living elements.
• a second problem is that of keeping the "textile" touch for a thread with bacteriostatic properties.
• a third problem is to make bacteriostatic properties of a yarn durable, without altering over time and regardless of the conditions of use of the textile.
• a fourth problem is to avoid the formation of bad odors, as well as allergies, by developing a new type of yarn for a textile.
• a fifth problem is to make a wire that can be ennobled without special precautions, dyeing, printing, and others.
• a sixth problem is that of preventing the formation of static electricity in a textile by the addition of a specific wire.
• a last problem is finally to make a textile article or an article of clothing, comprising at least one wire with biocidal properties.
• a composite yarn comprising a core and a sheath, characterized in that the core is made from at least one continuous yarn in one or more metal materials with biocidal properties and in that the sheath is made from one or more textile fibers directly covering all or part of the core.
• the core provides the biocidal properties and the sheath brings the characteristics of the yarns traditionally used in the textile field.
• biocide is meant properties referring to the European Biocide Directive 98-8.
• wire into one or more metallic materials is also meant sections of continuous wire, which can be calibrated or isotropic and spinned with a fiber ribbon.
• one or more textile fibers is also meant son or a continuous filament.
• the yarn will thus have bacteriostatic, fungistatic and / or algicidal properties, slow diffusion and controlled. It is therefore a thread, which by its composition, prevents the development of potentially pathogenic elements for living beings.
• the wire and the achievements that implement it, is no longer a source of contamination for the materials with which it comes into contact.
• the metal ions released by the core of the wire penetrate and complex with the ribonucleic acids and the proteins of the microorganisms, thus blocking any multiplication.
• the presence and low solubility of this metal core in liquid medium gives it an extreme longevity, linked to the permanence of its presence in the wire.
• the sheath will provide the properties usually known for textile yarns of the state of the art. Due to its characteristics, this type of yarn is used in the field of human and animal hygiene, food safety, the medical and agricultural environment, and the filtration of aqueous and gaseous media.
• the yarn is adapted to be implemented according to all the techniques used in the textile field, winding, sewing, weaving, knitting, braiding, embroidery, topping, and others.
• the son or son of the core can be plated (covered by electrolysis) with one or more metal materials with biocidal properties.
• This embodiment makes it possible to obtain a composite yarn, of which only the metal surface has the desired biocidal properties.
• this same embodiment relates to a composite yarn made of a first metallic material with the desired biocidal properties which is plated with a second metal material with other desired biocidal properties. The presence of two materials, copper and silver, prevents any oxidation of the two metals. On the wire, there are no black (for silver) or bluish (for copper) traces.
• the core may have an apparent surface with a structure forming attachment points for the textile fiber or fibers of the sheath.
• All the structures of a wire are possible.
• the soul has a geometric structure, as for example a line, a blade, a star, a flake, filamentous or all other forms, which facilitate the catch, the flu of the textile.
• the metal core may be streaked, blasted, undergo any type of treatment, to facilitate the attachment of the sheath.
• a non-planar, porous structure can be made to trap micro-air bubbles, with the aim of increasing the exchange surfaces and improve the thermoregulatory characteristics of the wire.
• the metal material (s) with biocidal properties may be favorably selected, alone or in alloy, in the group including zinc, silver, tin, copper, gold and nickel.
• the targeting of bacteria and other pathogenic elements to be destroyed leads to broad spectrum efficiency or the opposite with a particular action precision.
• the mixtures will be mainly composed of zinc and silver, the presence of copper being less important.
• the fungistatic function will be put forward and, in this case, the proportion of copper will be greater.
• the presence of the metal core, electrically conductive material, in the wire of the present invention will therefore be sufficient to dissipate the static electricity charges.
• the presence of a metal core, in the heart of a composite wire, provides the latter with a function of resistance to cutting.
• the textile fiber or fibers of the sheath may be chosen, alone or in a mixture, from the group comprising fibers of natural, artificial and synthetic origin.
• the fibers of natural origin can be advantageously chosen, alone or as a mixture, from the group comprising animal and / or vegetable fibers, for example cotton, wool, silk, linen, cellulose and still others.
• good heat resistance is obtained. If the sheath is wool, a good resistance to heat is obtained.
• the synthetic fibers may be chosen, alone or as a mixture, from the group comprising acrylics, polyamides, polypropylenes and others.
• the yarn according to the present invention can withstand dyeing, printing, heat setting, under the same processing conditions as conventional textiles.
• the yarn in a particular embodiment is composed of a cotton top layer, the latter may be bleached, dyed or printed under the same conditions of chemistry as a pure cotton yarn.
• the sheath can be favorably achieved by a method of assembly, wrapping, guimping, twisting, milling, friction spinning Dref TM (from FEHRER AG) and others.
• all or part of the core may be covered by a porous coating, so as to facilitate the attachment of the or textile fibers of the sheath.
• a textile is characterized in that it comprises at least one composite yarn as described above.
• the textile can be made by a process of weaving, knitting, braiding, embroidery, topping, nonwoven (by needling), and others.
• the fineness of section of the strand (s) composing the core allows the composite yarn to retain its flexibility.
• the fineness of section limits the so-called shape memory phenomenon related to the upper section wire (spring effect).
• the yarn of the present invention will withstand the stresses of shaping, specific to the implementations of textiles, such as the embossing, the needle passage, the tension of the sewing machines, etc.
• the textile will not provide any inconvenience of contact for the wearer or in the case of packaging for the transported or conditioned material.
• an article of clothing is characterized in that it is assembled using at least one composite yarn as described above.
• FIG. 1 shows a round core (line) of a composite wire according to a first embodiment
• FIG. 2 shows, in side view, a first processing method of the core of Figure 1 for obtaining a flat core (blade) and a composite wire according to a second embodiment
• FIG. 3 shows, in side view, a second method of processing the core of Figure 1 for obtaining a core and a composite wire according to a third embodiment
• FIG. 4 represents, in a view from above, a third process for treating the core of FIG. 2 to obtain a core and a composite yarn according to a fourth embodiment
• - Figure 5 shows, in top view, a fourth core processing method of Figure 2 for obtaining a core and a composite wire according to a fourth embodiment
• FIG. 6 shows a side view of a composite wire according to a first embodiment
• FIG. 7 shows a cross sectional view of a composite wire according to a second embodiment.
• the core (1) of a composite yarn is constituted by a line or monofilament, that is to say by a continuous round copper wire (2) covered with a thin layer of silver or tin (3).
• the copper wire (2) has a diameter of about 67 ⁇ m.
• the silver layer (3) has a thickness of about 5 thousandths of copper.
• the core (1) is laminated by passage between two rollers (4 and 6) of a smooth cold rolling mill.
• Figure 3 shows a method of treating the surface of the core (1) of Figure 1 by two knurling cylinders (8 and 9).
• the resulting silver-copper wire core (11) is marked to improve the grip of yarns and / or textile fibers, and to optimize the mass-to-surface ratio of the metals.
• Figure 4 shows a method of treating the surface of the core (7) of Figure 2 by two simple knurling rolls (12).
• the blade (13), forming the core, has transverse striations parallel to each other.
• Figure 5 shows a method of treating the surface of the core (7) of Figure 2 by two cross-knurling cylinders (14).
• the blade (16) forming the core has staggered ridges by cross knurling.
• the blade-shaped core (16) for example that obtained and shown according to the method of FIG. 5, is covered with a continuous textile fiber (17) by grinding. or wrapping.
• the composite yarn obtained (18) is thus guiped.
• the core (16) is gimped with a cotton of metric number 28.
• the covering consists of covering a core wire with one or more sheaths made of different wires.
• the monofilament blade (16) is energized to be guiped in mono or double sheath.
• the cotton, first winding brings its strength and softness. It can in case of double wrapping there is an outer winding.
• the covering fiber (17) is chosen according to its characteristics, so that it provides its own qualities (thermoregulation, textured fiber, etc.).
• the blade-shaped core (16), for example that obtained and shown according to the method of FIG. 5, is covered with discontinuous fibers (19).
• the composite yarn (21) is thus obtained by the Dref TM friction spinning technique.
• the antibacterial and antifungal properties of different yarns were evaluated.
• the yarns are transformed into knits for testing according to standardized microbiological tests, according to: Swiss Standard SNV 195 920, a qualitative test which determines the antibacterial activity by diffusion on agar; this standard shows the antibacterial activity of a textile support having undergone a finishing treatment or containing a fiber treated in the mass and giving rise to a diffusion of the active ingredient in the nutrient medium; Swiss standard SNV 195 921, a qualitative test which determines antifungal activity by agar diffusion; this standard demonstrates the antifungal activity of a textile support having undergone a finishing treatment or containing a fiber treated in the mass and giving rise to a diffusion of the active ingredient in the nutrient medium; the French standard XP G 39-010, a quantitative test that measures bacteriostatic properties by agar contact; this standard makes it possible to determine the bacteriostatic activity
• the control knit to validate the microbiological tests and to calculate the bacteriostatic and fungistatic efficiency, is made of a 100% cotton thread.
• the knits are steam sterilized before any microbiological test. Before carrying out the microbiological tests, a portion of the knitted test pieces is washed 10 times at 40 ° C., according to the ISO 6330 standard, in the presence of ECE detergent at 3 g / l, and rinsed with cold.
• Table 2 shows the results of the microbiological tests obtained using the qualitative standards SNV 195 920 and SNV 195 921.
• Table 3 shows the results of the microbiological tests obtained using the quantitative standard XP G 39-010, for the different knitwear samples, the different strains, before and after the 10 washes at 40 ° C.
• the strains used for the tests are: Staphylococcus aureus (Gram +), strain present on the skin and responsible for infection, Candida albicans (yeast), strain responsible for infection of the mucous membranes and Ospergillus niger (fungus), common strain present in the 'environment.
• the absence of inhibition zone means low activity.
• the absence of an inhibition zone means a weak release of metal ions in the agar.
• a weak release of metal ions in the agar prefigures a weak diffusion of the metal ions towards the surface which will be in contact during the use (the skin in the case of an undergarment, a food in the case packaging, etc.). This weak diffusion foreshadows a good biocompatibility.
• the bacterial concentrations are expressed in CFU (Colony Forming Units), in CFU log, in CFU log difference (values appearing in Table 3 below), for a contact time of 24 hours.
• concentrations of fungi or yeast cells are expressed in CFU (Colony Forming Units), in CFU log, in CFU log difference (values appearing in Table 3 below), for two contact times of 24. hours and 7 days.
• Tricot No. 3 composed of 20% copper and
• Tricot No. 4 (40% silver) and Tricot No. 5 (40% tinned copper) have a bacteriostatic activity on Staphylococcus aureus before washing and after 10 washes at 40 ° C. This activity is due to the presence of metal in the knit: presence of silver on the flat wire (blade), presence of copper and tin on the surface of the round wire.
• Knit # 7 (silver and copper base) has a fungistatic activity on Aspergillus niger before washing. This activity is due to the presence of a mixture of copper and silver in the wire of rectangular section which constitutes the knitting.
• the yarns that make up knits # 4, 5 and 7 therefore have bacteriostatic and / or fungistatic activity with respect to the same strains, respectively.
• a flat yarn (or blade: knit 4) is more active than a round yarn (knit 1) vis-à-vis Staphyloccocus aureus because of its structure.
• the tinned round copper wire (knit 5) is more active than the other round yarns (knit 2) with respect to Staphyloccocus aureus because of the presence of tin on the surface due to tinning.
• the uses of the yarn and the textile according to the invention are extremely varied.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)
• Knitting Of Fabric (AREA)
• Woven Fabrics (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34982505

Family Applications (1)

Country Status (6)

Families Citing this family (5)

Family Cites Families (14)

• 2005
  • 2005-02-15 FR FR0550426A patent/FR2882067B1/fr not_active Expired - Fee Related
• 2006
  • 2006-02-14 WO PCT/FR2006/000334 patent/WO2006087460A1/fr active Application Filing
  • 2006-02-14 JP JP2007554606A patent/JP2008531858A/ja active Pending
  • 2006-02-14 CA CA002599027A patent/CA2599027A1/fr not_active Abandoned
  • 2006-02-14 EP EP06709314A patent/EP1856315A1/fr not_active Withdrawn
  • 2006-02-14 US US11/884,359 patent/US20090124152A1/en not_active Abandoned

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events