Infrared radiation absorbing and emitting yarn

Abstract

The invention relates to a yarn (1a) comprising: 1) a first element (10a) consisting of a core yarn (2a) surrounded by a sheath (3a) comprising a material absorbing and emitting infrared rays, 2) a second element (11a) consisting of a covering yarn (4a,5a) that is wrapped around said first element (10a).

Description

DESCRIPTION TITLE: Infrared-absorbing and emitting thread

[0001] The present invention relates to a thread capable of absorbing and reflecting infrared radiation (hereinafter abbreviated as "IR") emitted by an individual. This thread can be one of the components of a textile material intended for direct contact with an individual's skin, to provide the individual with beneficial health effects.

[0002] Over the past few decades, a growing body of research has focused on the use of infrared (IR) radiation for its beneficial health effects. IR is non-ionizing electromagnetic radiation with wavelengths ranging from approximately 750 nm to 1 mm. IR rays originate from thermal energy; therefore, heat-emitting materials can produce them. Consequently, the human body emits IR radiation.

[0003] From a biological perspective, infrared radiation can affect living tissues from the cellular to the systemic level. At the molecular level, infrared radiation affects the rotation of molecules in body fluids and tissues. The potential clinical and physiological effect depends on tissue composition and the proportion of biomolecules in the body fluids. At the cellular level, the interaction between infrared radiation and living tissues results in heat-induced alterations in cell membrane potentials, through an increase in calcium levels. 2+Intracellularly. At the tissue level, an increase in nitric oxide levels, an endogenous antioxidant that counteracts the production of reactive oxygen species, is associated with reduced oxidative stress and vasodilation. Simultaneously, this stimulates the production of growth factors and the deposition of extracellular matrix, which promotes tissue repair. In this sense, the improved blood circulation associated with infrared radiation may promote the healing of wounds and pressure sores, decrease muscle spasms, improve sensory nerve conduction velocity, and potentially increase pain-modulating endorphins.

[0004] The numerous potential effects of IR radiation have been the subject of various studies. In summary, the health benefits of IR radiation are as follows: - improved blood circulation: IR rays increase blood flow and circulation, which helps to improve overall health and well-being; - Pain relief: IR rays are effective in reducing pain and discomfort in various conditions, such as muscle pain and arthritis; - Inflammation reduction: IR rays have anti-inflammatory properties, which helps reduce swelling and inflammation in the body; - a strengthening of the immune system: IR rays contribute to strengthening the immune system; which helps to protect against diseases; - improved cardiovascular health: IR rays help improve heart health by reducing blood pressure, lowering cholesterol levels and reducing the risk of heart disease; - an aid for weight loss: IR rays promote weight loss by increasing the body's metabolic rate and burning calories; - an improvement in sleep.

[0005] To fully benefit from the advantages of infrared radiation, devices (such as patches) are available. When applied to the skin, these devices absorb the infrared rays emitted by the human body and reflect them back onto the skin. For optimal benefits, it is important to keep the device in close contact with the skin, at specific locations.

[0006] As an example, application WO 2019 / 207266 A1 describes a composite piece intended for direct contact with an individual's skin, comprising a textile base incorporating at least partially an absorbing and IR-emitting material. This material consists of metal oxides. This composite piece may be in the form of a patch.

[0007] Furthermore, it is also advantageous to be able to obtain these IR absorption and emission properties in defined areas of a textile material intended to come into contact with specific parts of the body that one wishes to activate with IR rays to derive health benefits. Therefore, yarns incorporating an IR-absorbing and emitting material have been developed. These yarns can be woven or sewn onto defined areas of a textile material. Generally, the IR-absorbing and emitting material is added to the masterbatch of polymers as an additive before yarn manufacturing, for example, by extrusion followed by melt-spinning. This material is then distributed throughout the yarn and is therefore not present only on its surface.However, the beneficial effects of IR rays are achieved with the IR-absorbing and emitting material present on the surface of the yarn, ensuring it is in contact with the wearer's body. Therefore, these yarns are not entirely satisfactory, as some of this material is not being utilized. Furthermore, the presence of this material in the masterbatch can cause technical difficulties during the extrusion stage of yarn manufacturing.

[0008] To overcome these drawbacks, it is also known to coat yarns with a composition comprising a material that absorbs and emits IR rays. In other words, these yarns consist of a core yarn surrounded by a sheath containing a material that absorbs and emits IR rays. In this regard, patent application CN108642887 A describes an example of a fiberglass cotton yarn surface-coated with a composition based on an acrylic resin and comprising a powder of metal oxides to absorb and emit IR rays for the beneficial health effects detailed above.

[0009] However, absorbent and IR-emitting materials such as metal oxides are highly abrasive. Therefore, textile materials containing such yarns coated with these abrasive materials have the following disadvantages: - they are not comfortable to wear; - they are not resistant to washing: the metallic oxides will be eliminated during the various washes; - These yarns pose technical difficulties when weaving / knitting or using them for embroidery: the machines and needles working with these yarns can be damaged because the metal oxides are harder than the steel of these machines and needles.

[0010] The inventors sought to overcome all these drawbacks of these wires coated with an absorbing material and emitting IR rays, and developed a new wire which has the following advantages: - the textile materials obtained with this yarn are pleasant to wear and perfectly resistant to washing; - the thread does not damage the machines and needles used in weaving, knitting, embroidery during the manufacture of a textile material using this thread; - the wire comprises a much higher quantity of IR-absorbing and emitting material than known wires of the state of the art, whether wires coated with IR-absorbing and emitting material or wires for which said material has been added to the masterbatch during their manufacture.

[0011] The invention thus has as its first object a thread comprising at least: 1) a 1 er element which consists of: a core wire surrounded by a sheath that includes at least one material that absorbs and emits IR rays Or one 1 er core thread onto which is wrapped a thread which consists of a 2 ème 1) a core wire surrounded by a sheath comprising at least one material that absorbs and emits IR rays, 2) a 2 ème element consisting of at least one cover thread which is wrapped over said 1 er element.

[0012] It should be noted that braiding is the process of winding a thread or ribbon in a spiral around a central core consisting of a wire or cable. Therefore, in the context of the present invention, "to be braided onto..." means "wound in a spiral around...".

[0013] The 2 ème The core wire surrounded by the sheath can be braided over all or part of the 1 er thread of the soul.

[0014] The 2 ème element can be wrapped over all or part of the 1 er element. The 2 ème element thus forms a total or partial cover of the 1 er element.

[0015] The thread according to the invention is intended to be in direct contact with an individual's skin and, because it comprises a material that absorbs and emits IR rays, the beneficial health effects of IR rays detailed above are obtained.

[0016] Furthermore, the 2 èmeThe element of the yarn according to the invention, consisting of at least one cover yarn, constitutes a protection (or in other words, a "barrier") between the absorbing and emitting IR material and the external environment. This absorbing and emitting IR material is therefore not exposed to the external environment. Consequently, there is no risk of discomfort when wearing a textile material comprising the yarn according to the invention. Furthermore, this absorbing and emitting IR material is less likely to be removed during washing. Finally, thanks to this 2 ème element, the yarn according to the invention does not risk damaging the machines and needles during the manufacturing operations of a textile material such as for example weaving, knitting and embroidery and which use the yarn according to the invention.

[0017] The wire according to the invention can therefore be presented in 2 embodiments.

[0018] In the l èreIn its embodiment, the thread according to the invention comprises: 1) a core wire surrounded by a sheath comprising at least one material absorbing and emitting IR rays (namely the 1 er element) ; 2) at least one cover thread (namely the 2 ème element) which is wrapped on said core wire surrounded by said sheath.

[0019] In this l ère In this embodiment, the wire according to the invention advantageously comprises one or two sheath wires. Preferably, it comprises two sheath wires. This ensures optimal protection of the core wire surrounded by the sheath comprising the IR-absorbing and emitting material.

[0020] In the 2 ème In its embodiment, the thread according to the invention comprises: 1) a 1 er core thread onto which is wrapped a thread which consists of a 2 èmecore wire surrounded by a sheath comprising at least one material absorbing and emitting IR rays (namely the 1 er element) ; 2) at least one cover thread (namely the 2 ème element) which is covered on said 2 ème core wire surrounded by the sheath comprising the material absorbing and emitting IR rays.

[0021] The other technical characteristics of the yarn according to the invention which are common to these two embodiments are described below.

[0022] The soul thread of the l ère form of the yarn production according to the invention, the 1 er soul thread and the 2 ème soul thread of the 2 ème form realization of the thread according to the invention, as well as the covering thread(s) of the l ère and 2 ème The forms of realization of the yarn according to the invention can be of very varied nature and form.

[0023] These various core and cover yarns can be chosen from monofilament, multifilament, or spun fiber yarns. The fibers can be spun, carded, or twisted.

[0024] These various core and cover yarns can have a natural plant or animal origin, and can thus be chosen, for example, from cotton, wool, silk, jute, linen, hemp, and viscose yarns, used alone or in blends thereof. In this regard, viscose is a 100% cellulosic fiber that has been chemically modified. For example, it may be yarns marketed under the trade name Tencel®.

[0025] These various core and cover yarns can also be of synthetic origin, and be chosen, for example, from polyamide, aramid, polyester, polyvinyl alcohol, polyurethane (e.g., elastane), polyacryl nitrite, polybenzimidazole, polyetheretherketone, polyphenylene sulfide, polyacrylic, chlorofiber, and polyolefin yarns (such as polypropylene or polyethylene), used alone or in blends thereof. For example, it could be a blend of polyamide and elastane.

[0026] These different core and cover yarns can be pure yarns or be blends of synthetic and / or natural materials, chosen for example from those detailed above (namely cotton, wool, silk, jute, linen, hemp, viscose, polyamides, aramids, polyesters, polyvinyl alcohol, polyurethanes such as elastanes, polyacryl-nitrites, polybenzimidazole, polyether-etherketones, polyphenylene sulfides, polyacrylics, chlorofibers and polyolefins such as polypropylene or polyethylene).

[0027] In preferred embodiments of the invention, the soul thread of the 1 er method of embodiment of the invention, the 1 er soul thread and the 2 ème soul thread of the 2 ème embodiments of the invention may be polyamide yarns and at least one cover yarn may be a viscose yarn, for example Tencel®.

[0028] Preferably, the core yarn(s) of the yarn according to the invention have a count between 10 dtex and 3000 dtex. In this regard, it should be noted that the count of a yarn, expressed in tex, is the mass in grams of 1000 meters of that yarn. One tex is therefore equivalent to 10 -6 kg / m. Its submultiple is the decitex, abbreviated "dtex" which is more commonly used.

[0029] In some embodiments of the invention, the core wire(s) are elastic.

[0030] Preferably, the cover yarn(s) have a count between 50 dtex and 1000 dtex.

[0031] Advantageously, at least one of the covering yarns is a hydrophilic yarn. Preferably, the covering yarn(s) are yarns selected from cotton, hemp, linen, silk, or viscose yarns (for example, Tencel®). In these embodiments, the IR rays reflected by the yarn according to the invention will be better perceived by the body thanks to the traces of water trapped in the yarn, which will vibrate in unison with the reflected IR and thus increase the penetration of the IR into the body.

[0032] The yarn according to the invention can have a count between 100 dtex and 3000 dtex.

[0033] The material absorbing and emitting IR rays is advantageously metallic oxides, preferably chosen from the oxides of aluminium, titanium, zirconium, yttrium, magnesium, silicon, iron, cobalt, manganese, copper, zinc, chromium, tin and rare earths, taken alone or in mixtures thereof.

[0034] Preferably, the IR-absorbing and emitting material is in the form of particles with a diameter between 2 pm and 20 pm.

[0035] Advantageously, the IR-absorbing and emitting material is in the form of metal oxide particles with a diameter between 2 pm and 20 pm, preferably in the form of metal oxide particles with a diameter between 2 pm and 20 pm, the metal oxides of which are selected from the oxides of aluminium, titanium, zirconium, yttrium, magnesium, silicon, iron, decobalt, manganese, copper, zinc, chromium, tin and rare earths, taken alone or in mixtures thereof.

[0036] In addition to the IR-absorbing and emitting material, the sheath surrounding the core film in the ère embodiment of the wire according to the invention or the sheath surrounding the 2 ème soul thread in the 2 èmethe embodiment of the yarn according to the invention, may comprise at least one polymer, preferably a polymer selected from the group consisting of polyurethane, acrylics (for example polyacrylates), polystyrene / butadiene copolymer, natural or artificial latex (polyisoprene), silicone elastomer gel, silicone elastomer, butyl rubber, natural rubber, nitrile rubber, styrene block copolymer, polyester and polyvinyl chloride, taken alone or in mixtures thereof.

[0037] Advantageously, the sheath also includes at least one hydrophilic compound, for example, a compound selected from the group consisting of carboxymethylcellulose, hydroxypropylmethylcellulose, polyvinylpyrrolidone, glycerin, and polyethylene glycol. This allows traces of water to be embedded in the wire.

[0038] The sheath may also optionally include additional compounds selected from: - Hardeners, such as polyisocyanates, polyurethanes, or polyamides, used alone or in mixtures, to crosslink the polymer comprising the sheath; - Dispersants, such as polyacrylates and polyvinylpyrrolidone, used alone or in mixtures, to promote the dispersion of IR-absorbing and emitting materials (e.g., metal oxides) within the sheath composition, and - antifoams, for example based on silicones, polyether and hydrocarbons, used alone or in mixture, to limit the appearance of bubbles during the manufacture of the sheath composition.

[0039] The sheath advantageously has a thickness between 10 µm and 500 µm.

[0040] The yarn according to the invention may comprise, in mass percentages expressed relative to the total mass of said yarn: - between 15% and 85%, preferably between 20% and 50%, of the 1 er element, - between 15% and 85% of the 2 ème element.

[0041] The wire according to the invention may comprise, in mass percentages relative to the total mass of said wire, between 15% and 80%, preferably between 10% and 60%, of IR-absorbing and emitting material, preferably a material selected from those described above. Thus, the wire according to the invention may comprise between 15% and 80%, preferably between 10% and 60%, of metal oxides, preferably metal oxides selected from those described above. This mass percentage of IR-absorbing and emitting material can therefore be much higher than that of the prior art wires described above, whose mass percentage is generally between 1% and 10%. Due to this higher quantity of IR-absorbing and emitting material, the wire according to the invention has the advantage of being more effective in delivering the health benefits provided by IR radiation.

[0042] The sheath surrounding the soul film in the l ère embodiment of the wire according to the invention or the sheath surrounding the 2 ème soul thread in the 2 ème The embodiment of the wire according to the invention may comprise, in mass percentages expressed relative to the total mass of said sheath, between 5% and 80% of IR-absorbing and emitting material, preferably a material selected from those described above. Thus, said sheath may comprise between 5% and 80% metal oxides, preferably metal oxides selected from those described above.

[0043] The yarn according to the invention can be manufactured in the manner described below.

[0044] When the yarn according to the invention is a yarn according to the l ère In the form of embodiment described above, it can be obtained by means of a manufacturing process which includes at least the following steps: a) The core wire is surrounded by a sheath comprising the material that absorbs and emits IR rays in order to obtain the 1 er element ; 2a) we guipe on the 1 er element 2 ème element which consists of at least one cover thread.

[0045] Step a) of this manufacturing process can be carried out in different ways and may include the following 2 sub-steps: - a step of coating the core wire with a composition comprising a polymer and the IR-absorbing and emitting material, or a step of coating the core wire with a composition comprising said polymer followed by a step of adding the IR-absorbing and emitting material to said polymer; - a crosslinking step of said polymer around the core wire.

[0046] The coating step can be carried out in a coating installation that is perfectly within the reach of a person skilled in the art. For example, and without limiting the present invention, the coating installation may include a motorized rotating roller dipped in a bath containing: - at least the polymer (preferably a polymer chosen from those described above in the description of the sheath constituents), - optionally the IR-absorbing and emitting material (preferably chosen from those described above) and additional compounds (for example chosen from those described above in the description of the sheath constituents).

[0047] This rotating roller is configured so that the constituents of the bath remain at the periphery of the core wire without penetrating to the core, and a counter-roller is arranged above and in contact with said motorized rotating roller to obtain uniform coverage of the core wire, in other words to obtain a uniform sheath around the core wire.

[0048] The motorized roller may include grooves into which wires to be coated are separately inserted. The shapes and dimensions of the grooves depend on the thickness of the wire to be coated in order to calibrate the thickness and concentricity of the coating around said wire.

[0049] When the IR-absorbing and emitting material is not present in the coating bath, it can simply be added to the polymer after the polymer has been coated onto the core wire, for example by sprinkling or any other addition technique perfectly within the reach of a person skilled in the art.

[0050] The crosslinking step is also perfectly within the capabilities of a person skilled in the art. For example, and without limiting the present invention, this crosslinking step can be carried out in an oven, in particular an IR oven, at a temperature between 80°C and 200°C, preferably between 115°C and 185°C, more preferably between 130°C and 170°C, for a period of time between a few seconds (for example 30 seconds) and 10 minutes, preferably between 1 minute and 7 minutes, more preferably between 2 minutes and 5 minutes.

[0051] Step 2a) of the braiding process is perfectly within the reach of a person skilled in the art.

[0052] As explained above, the material that absorbs and emits IR rays (for example, metal oxides) can be abrasive. However, before the wrapping stage, it is present in the sheath, therefore on the surface of the 1 er element of the wire according to the invention.

[0053] Therefore, in order not to damage the braiding installation, according to a l ère An advantageous alternative is the 2nd layer of piping ème element on the 1 er This element can be made with a so-called "fixed-core" spindle. This means that the wire guide conduit of the spindle in the winding installation is a fixed, non-rotating tube inserted into a hollow shaft that rotates. Thus, because this conduit does not rotate, there is no risk of friction between the conduit and the first element. er element of the wire according to the invention which is therefore abrasive.

[0054] According to another advantageous variant, the braiding can be a so-called "reverse" braiding. This means that the guipage installation is configured in such a way that the cover wire (namely the 2 ème element) is wrapped on the 1 er element before entry of the 1 er element in the spindle supporting the coaxial reel onto which the cover wire is unwound. At the spindle output, a 2 ème The cover wire can be wrapped around the 1 er The cover yarn is woven according to the same reverse-guiding principle. Such a reverse-guiding installation is perfectly within the capabilities of a person skilled in the art. As a non-limiting example, application FR 2615532 Al describes an example of a reverse-guiding installation.

[0055] Furthermore, the braiding installation may include other equipment perfectly within the reach of a skilled person to avoid any problems of abrasive friction between the 1er element (before its wrapping by the 2 ème element) and steel elements of said installation. This may include, in particular, rotating equipment (for example, on casters) facilitating the movement of said 1 er element before its covering.

[0056] When the yarn according to the invention is a yarn according to the 2 ème In the embodiment described above, it can be obtained by a manufacturing process which includes at least the following steps: 1b) we circle the 2 ème core wire of a sheath comprising at least one material absorbing and emitting IR rays; 2b) we guipe on the 1 er soul thread said 2 ème core wire surrounded by the sheath so as to obtain the 1 er element ; 3b) we guipe on the 1 er element 2 ème element which consists of at least one cover thread.

[0057] Step lb) can be carried out in the same way as step la) described above for the l ère form of wire production according to the invention.

[0058] Step 2b) is a braiding step perfectly within the reach of a person skilled in the art.

[0059] Step 3b) can be carried out in the same way as step 2a) described above for the l ère form of wire realization according to the invention, and preferably in one of the advantageous variants (namely with a fixed core spindle or reverse wrapping).

[0060] The invention also relates to a textile material composed wholly or partly of the yarn according to the invention as described above. The yarn according to the invention may have been woven, knitted, or embroidered to obtain part or all of said textile material. For example, a patch may have been made with yarn according to the invention and attached (for example, by sewing) to a textile material.

[0061] The textile material can be knitted, woven, or non-woven.

[0062] The textile material can be all or part of clothing (e.g. T-shirts, gloves, trousers, underwear, hats, pyjamas), footwear (e.g. socks), compression articles (e.g. stockings and knee-highs, socks, forearm sleeves), sheets or orthotics (e.g. knee pads, elbow pads, ankle supports).

[0063] By way of illustration, the patch made with thread according to the invention can be sewn onto a t-shirt in specific areas to activate precise points on the body when the patch comes into contact with the skin. For example, the patch made with thread according to the invention can consist of a raised section that is sewn onto the t-shirt.

[0064] The textile material advantageously comprises between 15 g / m 2 and 30 g / m 2 of IR-absorbing and emitting material, preferably an IR-absorbing and emitting material chosen from those described above.

[0065] The invention will be better understood with the aid of the detailed description set forth below with reference to the attached drawing representing, by way of non-limiting example, two embodiments of a wire according to the invention.

[0066] Figure 1 is a schematic top view of a wire according to the invention along a lère form of implementation.

[0067] Figure 2 is a cross-sectional view along axis ll-ll of figure 1 of said wire according to the invention.

[0068] Figure 3 is a schematic top view of a 2 ème thread according to the invention according to a 2 ème form of implementation.

[0069] Figure 4 is a cross-sectional view along axis IV-IV of figure 3 of said wire according to the invention.

[0070] Figure 5 is an enlarged view of element 7b shown in Figure 4.

[0071] Figures 1 and 2 show a 1 er thread the according to the invention according to a l ère form of realization. The thread includes a 1 er element 10a which consists of a multifilament 2a core wire made of polyamide surrounded by a sheath 3a.

[0072] Sheath 3a comprises, in mass percentages expressed relative to the mass of said sheath 3a: - 50% of a mixture of polyurethane and polyacrylate, - 50% of a mixture of metal oxides.

[0073] The 1 er element 10a has a titration of 110 dTex.

[0074] A 2 ème element lia is wrapped over the entirety of 1 er element 10a of the wire according to the invention. More precisely, the 2 ème The Lia element includes: - a 1 er 4a Tencel® cover yarn with a 56 dTex count, which has been braided with a Z twist on the 1 er element 10a, - a 2 ème 5a Tencel® cover yarn with a 56 dTex count, which has been wrapped with an S twist on said 1 er 4a cover wire.

[0075] The wire has a thread count of 231 dTex.

[0076] Figures 3 and 4 show a 2 ème lb wire according to the invention according to a 2 ème form of realization. The lb wire includes a 1 erelement 10b which consists of a 1 er 6b multifilament polyamide core yarn, over which is wrapped with a Z twist a 7b yarn consisting of a 2 ème core wire 8b surrounded by a sheath 9b (as can be seen in figure 5).

[0077] The 7b wire has a fineness of 70 dTex.

[0078] The 2 ème 8b core wire is a multifilament polyamide wire.

[0079] Sheath 9a comprises, in mass percentages expressed relative to the mass of said sheath 9a: - 30% of a mixture of polyurethane and polyacrylate, - 70% of a mixture of metal oxides.

[0080] The 1 er element 10b has a titration of 180 dTex.

[0081] A 2 ème element 11b is braided with an S twist over the entire length of the 1 er element 10b of the lb wire according to the invention. More precisely, the 2 èmeelement 11b consists solely of a 4b cover yarn in Tencel® and 100 dtex count which has been wrapped with an S twist on the 7b yarn.

[0082] The lb wire has a fineness of 300 dTex.

[0083] EXPERIMENTAL SECTION:

[0084] Experiments were carried out with 3 threads according to the invention of different sizes, which corresponded to threads according to the l ère form of implementation described above.

[0085] The following standards were used in these experiments: - the NF NG07-316 standard method A2 for expressing the thread count; - the NF EN ISO 2062 standard to express the breaking strength of wires; - the NF EN ISO 2061 standard to express the twist of the wires.

[0086] Description of the 3 wires according to the invention:

[0087] 1 er thread according to the invention ("thick thread"):

[0088] The 1 er the thread according to the invention comprised a 1 er element which consisted of a core yarn made of polyamide 6-6 of 17 filaments and with a count of 117 dtex.

[0089] This core wire was surrounded by a sheath which comprised, in mass percentages expressed relative to the total mass of the sheath: 30% of a mixture of polyurethane and polyacrylate and 70% of a mixture of metallic oxides chosen from the following oxides: titanium, manganese, cobalt, zirconium, silicon, iron, aluminum, tin, magnesium, chromium and rare earth oxides.

[0090] The 1 er element of 1 er the thread according to the invention comprised, in mass percentages expressed relative to the mass of the 1 er element: 45.20% of the core wire and 54.80% of the sheath.

[0091] The 1 er element of 1 erThe wire according to the invention had a count of 272.6 dtex and a breaking strength of 760 centinewton (hereinafter abbreviated "cN").

[0092] The 2 ème element of 1 er thread according to the invention consisting of a 1 er and a 2 ème the cover thread was completely covered on the said 1 er element. The 1 er and the 2 ème The cover yarns were black Tencel® 100 dTex yarns. The 1 er The cover thread was braided on the 1 er element with a Z-torsion of 505 revolutions / m. The 2 ème The cover thread was braided on the 1 er blanket yarn with an S twist of 482 turns / m.

[0093] The 1 erThe yarn according to the invention had a count of 498.6 dtex and a breaking strength of 1154 cN. It comprised, in mass percentages expressed relative to the total mass of the yarn according to the invention: 25.60% polyamide 6-6 core yarn, 31.00% sheath, and 43.40% of 2 ème element (namely the 1 er and 2 ème cover threads).

[0094] 2 ème thread according to the invention ("mean thread"):

[0095] The 2 ème the thread according to the invention comprised a 1 er element which consisted of a core yarn made of polyamide 6-6 of 34 filaments and with a count of 78 dtex.

[0096] This core wire was surrounded by a sheath whose composition was identical to that of the 1 er thread according to the invention and as described above.

[0097] The 1 er element of 2 ème the thread according to the invention comprised, in mass percentages expressed relative to the mass of the 1 ercomponent: 70.80% of the core wire and 29.20% of the sheath.

[0098] The 1 er element of 2 ème The yarn according to the invention had a count of 110.3 dtex and a breaking strength of 468.3 cN.

[0099] The 2 ème element of 2 ème thread according to the invention consisting of a 1 er and a 2 ème the cover thread was completely covered on the said 1 er element. The 1 er and the 2 ème The cover yarns were ecru-colored Tencel® Nm 180 yarns. The 1 er The cover thread was braided on the 1 er element with a Z-torsion of 753 revolutions / m. The 2 ème The cover thread was braided on the 1 er blanket yarn with an S twist of 755 turns / m.

[0100] The 2 èmeThe yarn according to the invention had a count of 231.6 dtex and a breaking strength of 1725 cN. It comprised, in mass percentages expressed relative to the total mass of the yarn according to the invention: 22.50% polyamide 6-6 core yarn, 13.40% sheath, and 54.10% of 2 ème element (namely the 1 er and 2 ème cover threads).

[0101] 3 ème thread according to the invention ("thin thread"):

[0102] The 3 ème the thread according to the invention comprised a 1 er element which consisted of a core yarn made of polyamide 6-6 of 33 filaments and with a count of 10 dtex.

[0103] This core wire was surrounded by a sheath whose composition was identical to that of the 1 er thread and 2 ème son according to the invention and as described above.

[0104] The 1 er element of the 3 èmethe thread according to the invention comprised, in mass percentages expressed relative to the mass of the 1 er element: 46.50% of the core wire and 53.50% of the sheath.

[0105] The 1 er element of 2 ème The yarn according to the invention had a count of 70.2 dtex and a breaking strength of 231 cN.

[0106] The 2 ème element of the 3 ème thread according to the invention consisting of a 1 er and a 2 ème the cover thread was completely covered on the said 1 er element. The 1 er and the 2 ème The cover yarn was Tencel® Nm 180 yarn in ecru color. The 1 er The cover thread was braided on the 1 er element with a Z-torsion of 768 revolutions / m. The 2 ème The cover thread was braided on the 1 er blanket yarn with an S twist of 769 turns / m.

[0107] The 3 èmeThe yarn according to the invention had a count of 188.8 dtex and a breaking strength of 446 cN. It comprised, in mass percentages expressed relative to the total mass of the yarn according to the invention: 17.90% polyamide 6-6 core yarn, 20.60% sheath, and 61.50% of 2 ème element (namely the 1 er and 2 ème cover threads).

[0108] The yarns according to the invention can therefore have varying counts and can be particularly fine (with a count of approximately 189 dtex). This is particularly advantageous, as the textile industry seeks to use yarns with the lowest possible counts for the manufacture of textile materials.

[0109] Experiments with the 1 er thread according to the invention ("thick thread"):

[0110] The 1 er yarn according to the invention was knitted in single drop on a circular knitting machine of gauge 18.

[0111] The textile material thus obtained by knitting was tested on 25 study subjects.

[0112] More specifically, physiological effects were observed in the 25 study subjects when the textile material was folded into three layers and applied to their skin for 2 to 3 minutes to activate specific points on the body. These points were designed to release tension in the pelvic girdles, leading to right-left balance during pelvic rotations. This was achieved through the activation of trigger points in the anterior and posterior tibial muscles and the soleus muscles. When applying these points did not produce results, the posterior tibial muscles on both legs and the two dorsalis pedis muscles on the feet were also stimulated for an additional 2 minutes.

[0113] Furthermore, the textile material, folded into three layers, was applied to painful areas of 20 study subjects for a period of 3 to 5 days, depending on the specific issue (adherent scars, painful periods, sprains, bruises, etc.). All 20 subjects experienced significant relief equivalent to that provided by the usual use of an infrared patch marketed by Stimcare (namely, a patch consisting of cotton coated with a mixture of metallic oxides and designed to be adhered to the skin).

[0114] These experiments thus demonstrate the perfect effectiveness of a textile material according to the invention obtained with a yarn according to the invention to relieve pain and activate body points by absorption and reflection of IR rays.

Claims

DEMANDS 1. Thread (la,lb) comprising at least: 1) a 1 er element (10a, 10b) which consists of: a core wire (2a) surrounded by a sheath (3a) which comprises at least one material absorbing and emitting infrared rays (hereinafter abbreviated as "IR") Or one 1 er core thread (6b) onto which is wrapped a thread (7b) which consists of a 2 ème core wire (8b) surrounded by a sheath (9b) which comprises at least one material absorbing and emitting IR rays, 2) a 2 ème element (lia, 11b) consisting of at least one cover thread (4a, 5a, 4b) which is covered over said 1 er element (10a, 10b).

2. Thread (la,lb) according to claim 1, characterized in that the core thread (2a), the 1 er soul thread (6b), the 2 èmecore yarn (8b) and at least one cover yarn (4a, 5a, 4b) are pure yarns or blends of synthetic and / or natural materials selected from cotton, wool, silk, jute, linen, hemp, viscose, polyamides, aramids, polyesters, polyvinyl alcohol, polyurethanes, polyacryl nitrites, polybenzimidazole, polyether-etherketones, polyphenylene sulfides, polyacrylics, chlorofibers, polypropylene and polyethylene.

3. Yarn (la,lb) according to claim 1, characterized in that the core yarn (2a), the 1 er soul thread (6b), the 2 ème core yarn (8b) are polyamide yarns and at least one cover yarn (4a, 5a, 4b) is a viscose yarn.

4. Yarn (la,lb) according to any one of claims 1 to 3, characterized in that at least one cover yarn (4a, 5a, 4b) is a hydrophilic yarn.

5. Yarn (la,lb) according to any one of claims 1 to 4, characterized in that it has a count between 100 dtex and 3000 dtex.

6. Wire (la,lb) according to any one of claims 1 to 5, characterized in that the IR-absorbing and emitting material is in the form of metal oxide particles with a diameter between 2 pm and 20 pm, the metal oxides being selected from aluminum, titanium, zirconium, yttrium, magnesium, silicon, iron, cobalt, manganese, copper, zinc, chromium, tin and rare earths, taken alone or in mixtures thereof.

7. Yarn (la,lb) according to any one of claims 1 to 6, characterized in that the sheath (3a, 9b) comprises at least one polymer selected from the group consisting of polyurethane, acrylics, polystyrene / butadiene copolymer, natural or artificial latex, silicone elastomer gel, silicone elastomer, butyl rubber, natural rubber, nitrile rubber, styrene block copolymer, polyester and polyvinyl chloride, taken alone or in mixtures thereof.

8. Yarn (la,lb) according to any one of claims 1 to 7, characterized in that it comprises, in mass percentages expressed relative to the total mass of said yarn (la,lb): - between 15% and 85%, preferably between 20% and 50%, of the 1 er element (10a, 10b), - between 15% and 85% of the 2 ème element (lia, 11b).

9. Wire (la,lb) according to any one of claims 1 to 8, characterized in that it comprises, in mass percentages expressed in relation to the total mass of said wire (la,lb), between 15% and 80%, preferably between 10% and 60%, of material absorbing and emitting IR rays.

10. Textile material, characterized in that it is composed wholly or partly of yarn (la,lb) according to any one of claims 1 to 9.

11. Textile material according to claim 10, characterized in that it comprises between 15 g / m 2 and 30 g / m 2 of material that absorbs and emits IR rays.

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