FR2984925A1 - Manufacturing multi-layer fabric that is intended to make textile product for person suffering from incontinence and comprises first hydrophobic layer arranged to form front face and second hydrophilic layer arranged to form back face - Google Patents

Abstract

The method for manufacturing a multi-layer fabric comprising a back surface (2) that corresponds to an inner side of the fabric, faces a body of a person and is arranged to be liquid permeable, a front face (3) that corresponds to a visible outer face of the fabric, a first hydrophobic layer (C1) arranged to form the front face of the fabric, and a second hydrophilic layer (C2) arranged to form the back face of the fabric, is claimed, where the hydrophobic layers are distinct, juxtaposed and joined together by a set of warp and/or weft threads of one of the layers to form bonding points (P1). The method for manufacturing a multi-layer fabric comprising a back surface (2) that corresponds to an inner side of the fabric, faces a body of a person and is arranged to be liquid permeable, a front face (3) that corresponds to a visible outer face of the fabric and is arranged to be air permeable and liquid impermeable from the back face, a first hydrophobic layer (C1) arranged to form the front face of the fabric, and a second hydrophilic layer (C2) arranged to form the back face of the fabric, is claimed, where the hydrophobic layers are distinct, juxtaposed and joined together by a set of warp and/or weft threads of one of the layers to form bonding points (P1), and the assembly is concomitant weaving. The method comprises: juxtaposing an insulating layer with the second hydrophobic layer by the warp and/or weft threads of one of the layers, where the insulating layer is distinct and assembled with the hydrophobic layers by a connection unit; separately weaving the insulating layer with the two hydrophobic layers, where the insulating layers are assembled with the hydrophobic layers by the bonding points; simultaneously weaving the insulating layer with the two hydrophobic layers, where the insulating layer is assembled with the hydrophobic layers by the warp and/or weft threads of one of the hydrophobic layers and the insulating layer to form other bonding points; and assembling all the layers to form the multi-layer fabric and forming the bonding points with the warp and/or waft threads of one of the layers to create a grid of connection points extending along a surface of the multi-layer fabric and providing mechanical cohesion. The bonding points comprise adhesive points, thermo soldering points and seam points. A ratio of the density of the warp threads of the first hydrophobic layer and the density of the warp threads of the second hydrophobic layer is in a range of 1/0.2-1/1. A ratio of the density of the weft threads of the first hydrophobic layer and a density of the weft threads of the second hydrophobic layer is in a range of 1/0.4-1/1. A ratio of the density of the warp threads of the first hydrophobic layer and the density of the warp threads of the insulating layer is in a range of 1/0.2-1/1. A ratio of the density of the weft threads of the first hydrophobic layer and a density of the weft threads of the insulating layer is in a range of 1/0.4-1/1. A density of the second hydrophobic layer is most equal to a density of the first hydrophobic layer. A density of the insulating layer is most equal to the density of the first hydrophobic layer. The bonding points are in a form of square, rectangle and rhombus. The binding points formed between two of the layers are in a range of 0.5-3 cm per warp and/or weft threads. An independent claim is included for a multi-layer fabric.

Description

METHOD FOR MANUFACTURING A MULTILAYER FABRIC, FABRIC OBTAINED BY SAID METHOD AND USE OF SAID FABRIC FOR PREPARING A TEXTILE ARTICLE, IN PARTICULAR A CLOTHING FOR A PERSON WITH INCONTINENCE Technical Field: The present invention relates to a method of manufacturing a multilayer fabric for at least partly making a garment, in particular for a person suffering from incontinence, this fabric having a reverse side, corresponding to the internal face of the fabric facing the body of the person, and arranged to be permeable to liquids, and a face facing, corresponding to the outer face of the visible fabric and arranged to be permeable to air and impervious to liquids from said back side.

The invention also relates to a multilayer fabric obtained by said manufacturing method and a textile article made at least partly with said multilayer fabric such as a garment especially for a person suffering from incontinence.

PRIOR ART: The persons suffering from incontinence have at their disposal urinary and hygienic protections adapted to contain to a certain extent the urinary leakage (accidental or involuntary loss of urine) or even the urination (natural expulsion by overflow of the accumulated urine in the bladder). Nevertheless, the existing urinary and hygienic protections are not always effective and sufficient, and accidents can occur immediately generating both psychic and physical discomfort for the person. The worn garment then imbibes instantly, allowing moisture to pass through the fabric and marking the location of the garment with a visible and recognizable halo. This discomfort is accompanied by olfactory discomfort and a feeling of cold residual moisture in contact with the skin if the garment is not changed quickly.

Other solutions exist, little used because more restrictive, which consist of providing flexible pockets to collect urine requiring external probes, these pockets being concealed in specifically adapted clothing. Moreover, in the field of clothing, there are so-called breathable clothing, that is to say capable of absorbing and evacuating, over time, small amounts of moisture produced by perspiration in accordance with publications presented below. Nevertheless, the textiles used are not designed to instantly absorb a large quantity of liquids produced in particular during a urinary leak or a urination.

The publication US Pat. No. 5,787,503 proposes a textile fabric for making breathable but heat-resistant pullovers, this fabric being obtained by simultaneously knitting two superimposed layers and assembled to delimit between them insulating pockets, the inner layer being hydrophilic and the outer layer being hydrophobic.

Publication WO 03/001934 A1 proposes a textile for making breathable garments, this textile being obtained by simultaneously weaving two layers of warp yarns, superimposed and assembled by a weft connecting thread which may be hydrophilic, the inner layer being hydrophilic and the outer layer being hydrophobic. In these two publications, the son respectively composing the hydrophilic inner layers and the hydrophobic outer layers are chemically treated to improve their respectively hydrophilic and hydrophobic properties.

DISCLOSURE OF THE INVENTION The present invention aims to overcome these disadvantages by proposing a new washable and durable fabric, to make clothing of standard appearance undifferentiated, to manage situations of urinary leakage, or even urination, in the presence or no hygienic protection, and thus improve the psychological and physical comfort of the person suffering from incontinence, this thanks to the fact that this new fabric offers on one side an instantaneous absorption of a large quantity of liquids, the on the other side a total impermeability leaving no visible trace of moisture on the fabric. Another object of the invention is to provide a fabric capable of reducing or even eliminating the sensation of residual moisture in contact with the body after urinary leakage or even urination. The invention also aims to provide a complementary fabric capable of resorbing odors and bacteria generated in these situations of discomfort, thereby eliminating the release of odor nuisance and the risk of development of mycosis. For these purposes, the invention relates to a manufacturing method of the kind indicated in the preamble, characterized in that a multilayer fabric having at least two layers having different properties, namely at least one layer, is produced on a weaving machine. hydrophobic element arranged to form said surface face of the fabric and consisting of a network of hydrophobic warp yarns and weft yarns, and at least one hydrophilic layer arranged to form said reverse side of the fabric and constituted by a network of warp yarns and hydrophilic weft yarns, said at least two hydrophobic and hydrophilic layers being distinct, juxtaposed and assembled together punctually by warp and / or weft threads of at least one of said layers to form binding points, this assembly being concomitant with said weaving.

This construction promotes the rapid absorption of liquids since it is multidirectional and is carried out simultaneously in the weft direction and in the direction of the hydrophilic layer chain, and increases the absorption capacity since the hydrophilic and hydrophobic layers are distinct and assembled by a grid of binding points forming spaces favoring the retention of liquids. In an advantageous embodiment, at least one insulating layer consisting of a network of at least half hydrophobic warp and weft yarns is juxtaposed to said hydrophilic layer, said insulating layer being distinct and piecely assembled at the same time. at least one of said hydrophobic and hydrophilic layers by connecting means. According to an alternative embodiment, said insulating layer is woven separately from said at least two hydrophobic and hydrophilic layers, and said insulating layer is assembled to at least one of said hydrophobic and hydrophilic layers by attached tie-down points, which may be selected from glue dots, heat seal points, stitches. According to another variant embodiment, said insulating layer is woven simultaneously with said at least two hydrophobic and hydrophilic layers, and said insulating layer is assembled with at least one of said hydrophobic and hydrophilic layers by chain and / or or weft of at least one of said hydrophilic, hydrophobic and insulating layers forming binding points, this assembly being concomitant with said weaving.

To assemble said two distinct layers forming said multilayer fabric in pairs, these binding points are preferably formed with the warp threads and the weft threads of at least one of said layers to create a grid of connecting points. extending over the surface of said multilayer fabric and imparting mechanical cohesion thereto. These binding points can be arranged in a pattern chosen from the square, the rectangle and the rhombus to form the mesh of the said grid.

For these purposes, the invention also relates to a multilayer fabric obtained by the manufacturing method according to one of the embodiments described above, as well as the use of said multilayer fabric for making at least partly a textile article, such as clothing, especially for someone suffering from incontinence.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention and its advantages will appear better in the following description of several embodiments given as non-limiting examples, with reference to the appended drawings, in which: FIGS. 1, 2, 3 and 4 schematically represent the assembly of two and three weave layers respectively to form the multilayer fabric according to the invention, - Figure 5 is an exploded perspective view and enlarged showing the fabric according to the assembly of Figure 2, - the FIG. 6 is a schematic sectional view showing the operating principle of the fabric of FIG. 5; FIG. 7 is an enlarged bottom view of the fabric of FIG. 2 showing a binding point, FIG. 8 is a diagram illustrating the instantaneous retention rate of liquids by the tissue of Fig. 1 and its evolution over time, and - Figs. 9A and 9B are bottom views of the fabric of Fig. 3 showing respective binding points between layers 1 and 3 and between layers 2 and 3.

Illustrations of the invention and different ways of achieving it: In advance and for a good understanding of the invention, it is useful to recall the definition of the following terms: 1) Hydrophilic material: which has an affinity with water and absorbs an aqueous liquid (see tests below). 2) Hydrophobic material: which repels water and can not be wetted by an aqueous liquid (see tests below). 3) Absorption: impregnation and retention of an aqueous liquid. 4) Resorption: evacuation of an aqueous liquid. To check the hydrophobic and hydrophilic functions, the following performance tests are used, based on the standards in force and adapted to the conditions of use of said fabric. All performance tests must be performed on samples conditioned at 20 ° C ± 2 ° C and 65% ± 4% RH. Sufficient time must be allowed for the sample (s) to adapt to the conditions of the test room. These tests may be performed with synthetic urine whose formulation is specified below to approximate real conditions of use of said tissue.

Formulation of synthetic urine The formulation of synthetic urine is suggested according to US 5,331,021. In 1000 ml of water of quality 3 according to the ISO 3696 standard: 0.64 g of CaCl 2 + 1.14 g of MgSO 4 .7H 2 O + 8.20 g NaCl + 20 g of urea. 1) Hydrophilicity tests Method based on NF G07-166 test A + B: Retention rate and drying ability of a fabric.

This test determines the immediate quantity of water retained by a fabric expressed in retention rate -Test A- and its ability to dry more or less rapidly and to evaluate its drying time. Test B- Retention rate: expression in percentage the amount of water or synthetic urine retained by a fabric as a function of the mass of the test piece of the initially conditioned fabric. Procedure Test A: A conditioned 100cm2 (0.01m2) test specimen is weighed beforehand. It is then immersed for complete wetting for 10 seconds without undergoing spinning and weighing. The immediate retention rate is thus expressed as a function of the wet mass relative to the conditioned mass. The test piece is then suspended on a wire in conditioned medium.

Test B: Immediately following test A, the test piece is weighed every 10 minutes by being, after each weighing, repositioned on the spreading wire. The time course of water retention rate or synthetic urine will be translated as a graph (see Figure 8) and will make a judgment on the ability of the fabric to dry and its overall duration drying. 2) Hydrophobicity tests There are three hydrophobicity tests. 2a) Spray Test Test Method (Based on AATCC TM 22 / ISO 4920 / NF G07-056) The Spray Test measures the resistance of a fabric to wettability by water. The devices to be used are described in each method indicated above.

Procedure A1: surface hydrophobicity test 1. Prepare and package a 180mm square fabric test piece. 2. Securely mount the test piece on an embroidery hoop so that the area of the fabric is above. The test specimen shall be oriented in such a way that the warp direction is parallel to the flow of water or synthetic urine on the specimen. 3. Pour 250 ml of distilled water or synthetic urine at 20 ± 1 ° C into a funnel quickly but regularly allowing the liquid to be sprayed onto the sample continuously. 4. Immediately after the end of the watering, remove the embroidery hoop with its test piece, turn it over so that the plane of the fabric is horizontal and the face of the fabric is facing down, and strongly strike the frame against a hard object, in two diametrically opposite points. 5. After that, while the specimen is still on the embroidery hoop, give the test piece a mark (from 1 to 5) by visual assessment of the fabric on the spot according to the rating scale provided by the standard. Do not try to assign intermediate values. Rating 1 = Complete wetting of the entire irrigated area Rating 2 = Wetting of more than half of the total irrigated area Rating 3 = Wetting of the irrigated surface only on small separate areas Rating 4 = No wetting, only small droplets adhere to the watered surface Rating 5 = No wetting and no droplets on the sprayed surface Procedure A2: Testing the hydrophobicity of migration from back to the site 1. Prepare and package a 180mm square shaped test tube . 2. Securely mount the test piece on an embroidery hoop so that the back of the fabric is above. The test specimen shall be oriented in such a way that the warp direction is parallel to the flow of water or synthetic urine on the specimen. 1. Pour 250 ml of distilled water or synthetic urine at 20 ± 1 ° C into a funnel quickly but regularly allowing the liquid to be sprayed onto the sample continuously. 2. Immediately after the end of the watering, remove the embroidery hoop with its test piece, turn it over so that the plane of the fabric is horizontal and the reverse side of the fabric is facing down, and strike the frame sharply against a hard object, in two diametrically opposite points. 3. After that, while the test piece is still on the embroidery hoop, give the test piece a mark (from 1 to 5) by visual assessment of the fabric on the spot according to the rating scale provided by the standard. Do not try to assign intermediate values.

Rating 1 = Complete wetting of the place over all the surface watered. Rating 2 = Wetting of more than half of the area over the entire area being watered. Rating 3 = Wetting of small areas separated on the spot over all the surface upside down. Rating 4 = No wetting, only small droplets adhere to the surface and watered over the entire surface. Rating 5 = No wetting and no droplet on the surface place all over surface watered. 2b) Method based on standard NF G07-057 / ISO 811: Determination of resistance to water penetration: test under hydraulic pressure.

Principle: The hydrostatic pressure carried by a fabric is a measure of the resistance to the passage of water through the fabric. A test piece is subjected to a water pressure which regularly increases on one face, under standardized conditions, until the passage occurs at three points. The pressure is noted when the water passes through the third point. The water pressure can be applied to the top or bottom of the specimen. The water may be substituted with synthetic urine to meet the problem of the invention. The result is in direct correlation with the behavior of fabric articles that are subjected to urine pressure for short or medium periods of time. Apparatus: The apparatus employed must allow the following conditions to be met: it must be possible to fix the specimen in such a way that 1) it is horizontal and not curved 2) the surface of the 100 cm2 fabric is subjected at the pressure of the chosen liquid regularly growing on the top or bottom of the fabric 3) no leakage at the joints occurs during the test 4) the specimen does not slip between the clamps 5) the the tendency of the liquid to pass near the clamping end of the specimen is reduced to a minimum 6) the liquid in contact with the specimen must be maintained at 20 ° C (previously conditioned in the laboratory) 7) the speed of increase of the pressure of the liquid must be 10 ± 0.5cmH2O (1cmH2O = 98.0665Pa) 8) the manometer connected to the tank used for the test must be able to read pressures with a precision of 0.5cmH20 Procedure: 1) Bring water of quality 3 according to ISO 3696 or No. 5,331,021 2) Take at least 5 square test pieces of 100 cm2 at different locations of the fabric so that they are representative of the article as completely as possible 3) Wipe all water from clamping joints 4) Take one of the 5 conditioned test specimens and tighten the specimen onto the test cell so that the inner side of the tissue is in contact with water or synthetic urine. Tightening must be done in such a way that the liquid is not discharged through the test tube before the start of the test. 5) Immediately subject the sample to increasing liquid pressure. 6) Monitor continuously to observe the passage of the liquid. 7) Record in centimeter of conventional liquid, the pressure for which the liquid appears at the third point of passage on the spot of the specimen 8) The accuracy to which this pressure must be noted is 0.5cm up to 1mH20 9) Do not take into account the very small droplets that do not develop after their formation 10) Do not count the successive drops that form at the same point of passage on the fabric 11) Try new test tubes until the necessary number of results obtained 12) Give the individual result and average in conventional liquid centimeters. 2c) Method based on AATCC TM 193: Test of water repellency at the "drop of water" or W.R.T. (Water Repellency Test) This test determines the resistance of a finished fabric to humidification by aqueous liquids. Drops of a water + alcohol mixture are placed on the fabric, and the surface wettability is determined visually. This test provides a raw index of water repellency. In general, the higher the index, the more the finished fabric is water repellent to aqueous liquids. The composition of standard test liquids is shown in Table 1. Index Number% Isopropanol% Distilled Water Surface Tension W.R.T. CAS No. 67-63-0 CAS No. 7732-18-5 (dynes / cm at 25 ° C) 1 2 98 59.0 2 5 95 50.0 3 10 90 42.0 4 20 80 33.0 5 30 70 27.5 6 40 60 25.4 7 50 50 24.5 8 60 40 24.0 * Standard test: liquids can be prepared loose in the laboratory by purchasing isopropyl alcohol grade reagents (CAS RN 67-63-0) and distilled water (# 7732-18-5) ) and mixed according to the percentages of volume according to the indices stated above.

Procedure: 1. Place the fabric face up on a flat horizontal surface. Pipette 3 drops of approximately 5 mm in diameter or 0.05 ml onto the test tissue at 3 different places of the prepared solution, taking care to start with the solution with the highest index. 2. Observe the drops for 10 seconds at an approximate angle of 45 °. 3. If 2 of the 3 drops, of the deposited solution, wet and penetrate the tissue before 10 seconds, repeat the operation with the lower solution until the sample remains dry after 10 seconds. 4. The index of the solution allowing to reach 10 seconds without penetration in the fabric will be index W.R.T. of the sample tested. With reference to the figures, the multilayer fabric 1, 10, 100, 1000 according to the invention is produced on weaving machines with single or multi-beams, making it possible to create a multilayer fabric comprising at least two layers having different properties, so that it comprises a reverse side 2, corresponding to the inner face of the fabric facing the body of the person, arranged to be permeable to liquids, and a face 3, corresponding to the outer face of the visible fabric and arranged to be permeable airtight and impervious to liquids from the back side 2.

The basic version of the multilayer fabric 1 is shown in FIGS. 1 and 7, and comprises at least two layers, namely at least one hydrophobic layer C1 arranged to form the surface face 3 of the fabric 1 and consisting of a network of chain and hydrophobic weft yarns, and at least one hydrophilic layer C2 arranged to form the backside of the fabric 1 and consisting of a network of hydrophilic warp yarns and weft yarns. The hydrophobic C1 and hydrophilic layers C2 are distinct, juxtaposed and assembled together punctually by warp and / or weft yarns of at least one of the two layers C1, C2 to form binding points P1, one of which Tying Pl is visible on the reverse side of the fabric 1 of Figure 7. This assembly is performed concomitantly with the weaving by a programmed movement of the dobbies. In the example shown, the binding points P1 are made both with the warp threads and the weft threads of one of the layers C1 or C2 crossed with the warp threads and the corresponding weft threads of the other layer C2 or Cl, so as to form a grid of tie points Pl which extends over the entire surface of the fabric 1 to impart to said fabric a mechanical cohesion allowing it to be worked as a monolayer fabric. According to the arrangement of the binding points Pl in the plane of the fabric 1, the grid pattern of the grid may vary between a square, rectangular, diamond or any other suitable form. The density of the binding points P1 is also a variable datum which is determined as a function of the cohesion of the desired fabric and its absorption power. A number of tie points P1 between 0.5 and 3 tie points P1 per centimeter of warp and / or weft are generally chosen. In this basic version, the density of the hydrophilic layer C2 is at most equal to the density of the hydrophobic layer C1. Depending on the type of fabric to be produced according to the textile article to be made, the cohesion of the desired fabric and its absorption capacity, it is possible to choose a ratio of the chain yarn density of the hydrophobic layer C1 to the chain yarn density of the hydrophilic layer C2 of between 1 / 0.2 and 1/1, and a ratio of the weft density of the hydrophobic layer C1 on the weft density of the hydrophilic layer C2 between 1 / 0.4 and 1/1.

The bilayer structure of the multilayer fabric 1 makes it possible to create a space E1 between the two layers C1 and C2 capable of retaining the liquids absorbed by the hydrophilic layer C2. The difference in physical properties and the difference in densities between the hydrophilic C2 and hydrophobic C1 layers make it possible to create an impermeable barrier preventing the absorbed liquids to pass through the face 3 of the fabric 1 and to form degradable visible traces of moisture, as illustrated. in Figure 6.

The choice of hydrophobic and hydrophilic yarns for forming the hydrophobic layer C1 and the hydrophilic layer C2 is a function of the nature of the fibers or filaments composing said yarns and the type of fabric to be produced as a function of the application under consideration, namely the type of textile article to be made. Certain fibers are naturally more hydrophobic, that is to say with a moisture absorption rate of less than 2%, especially fibers, filaments or synthetic threads, for example polyamide, polyester, polyethylene or polypropylene. , polyurethane, etc. Similarly, some fibers are naturally more hydrophilic, especially fibers, filaments or natural threads such as wool, bamboo, cotton, linen, etc., and fibers, filaments or artificial threads such as viscose, Lyocell®, Lenpur®, modal, polynosic, etc. These examples of material are not limiting, it being specified that the hydrophobic and hydrophilic fibers, filaments or threads may be fibers, filaments and mono-material or composite yarns depending on the objective to be achieved.

On the other hand, fibers, filaments and yarns having naturally more hydrophobic or more hydrophilic properties can undergo chemical treatment in order to improve these properties. On the other hand, fibers, filaments and yarns that do not naturally have these properties can also become so by undergoing chemical treatment. These chemical treatments can be carried out at different stages of the transformation of fibers and filaments into yarns. They are also widely known and widespread as evidenced by the publications cited in the state of the art and will not be described in more detail. By way of example, mention may be made of the treatment of fibers, filaments or yarns with resins of the carbo-fluorinated type or the like, or by a plasma or graft-type hydrofugation process, to confer or improve the hydrophobic properties. By way of example, mention may also be made of the treatment of fibers, filaments or yarns with additives such as superabsorbent polymers such as polyelectrolytes, microencapsulated or otherwise, sprayed or flocked, to confer or improve the hydrophilic properties.

The choice of the metric number of the hydrophobic and hydrophilic threads making it possible to form the hydrophobic layer C1 and the hydrophilic layer C2 is also a function of the desired properties and the type of fabric to be produced as a function of the application under consideration, namely the type of article textile to make. The yarns can be obtained by any known spinning process, such as simple, twisted, Sirospun®, corespun, etc. The metric number of a wire (Nm) is a unit of measurement for the size of a wire and corresponds to the number of meters per gram of wire. To produce the hydrophobic layer C1, the warp threads can be chosen in the range from 34/1 to 120/1 Nm, the first digit corresponding to the Nm and the second digit to the number of ends forming the thread, and the weft threads. can be chosen in the range of 28/1 to 85/1. To produce the hydrophilic layer C2, the warp yarns may be selected in the range of 34/1 to 120/1 Nm, and the weft yarns may be selected in the range of 34/1 to 85/1. These examples of metric numbers are not limiting. Similarly, the multilayer fabric 1 according to the invention can be advantageously supplemented by additional properties such as anti-odor, antibacterial and so on. according to the type of fabric to be made according to the application in question, namely the type of textile article to be made, in order to improve the comfort of people. These additional properties can be obtained by additive treatments such as chemical treatment, molecular grafting, coating, spraying, impregnation, exhaustion, photosynthesis, etc. performed at different stages of processing fibers and filaments into yarns and / or the finishing of the fabric. These treatments are known and will not be described in detail. According to the made-up textile article, the hydrophobic threads forming the hydrophobic layer C1 can be partly or wholly combined with an elastic filament such as elastane to give the multilayer fabric 1 obtained an extensible power. This additional property allows in the case of clothes close to the body to improve the comfort of people. The multilayer fabric according to the invention makes it possible to make various and varied textile articles both in the field of furniture and clothing. It is not possible to compile an exhaustive list. For furniture, there may be mentioned, for example, bed mattresses, upholstery for furniture such as chairs, armchairs, sofas, etc. For clothing, for example, pants and their derivatives, skirts and their derivatives, dresses and their derivatives, nightwear, underwear, swaddling clothes, etc. FIG. 2 illustrates a first variant embodiment of the multilayer fabric 10 according to the invention which comprises at least a third textile layer forming an insulating layer C3 juxtaposed with the hydrophilic layer C2 of the basic version of the fabric 1 illustrated in FIG. forming the backside 2 of the fabric 10. This insulating layer C3 consists of a network of at least half hydrophobic and mostly hydrophobic warp and weft threads, for example by means of a checkerboard pattern. It is distinct, separately woven and piecely assembled to the hydrophobic C1 and hydrophilic C2 layers by reported P2 bonding points.

These reported P2 bonding points may be selected from glue dots, heat seal points, stitches or the like. If they are stitches, they are preferably made with a hydrophobic yarn. In this variant embodiment, the density of the insulating layer C3 is lower and at most equal to the density of the hydrophobic layer C1. It is possible to choose a ratio of the density of the strands of the hydrophobic layer C1 to the density of wires. of chain of the insulating layer C3 between 1 / 0.2 and 1/1, and a ratio of the weft density of the hydrophobic layer C1 to the weft density of the insulating layer C3 between 1 / 0.4 and 1/1.

The hydrophobic and hydrophilic yarns constituting the multilayer fabric 10 according to this first embodiment are identical to those described with reference to the basic version according to FIG. 1. As are the ranges of metric numbers of said yarns, and the number of stitches. binding per centimeter of warp and weft. Figures 5 and 6 illustrate the principle of operation of the multilayer fabric 10 according to this first embodiment. Liquids from the body of the person pass through the insulating layer C3 of low density and hydrophobic. The liquids are absorbed and stored by the hydrophilic layer C2 and the space El created between the hydrophobic layer C1 and the hydrophilic layer C2. Because of the choice of materials and densities, the layer C2 is superhydrophilic and the layer C1 is super hydrophobic. The hydrophobic layer C1 allows the passage of air but does not allow the liquids to pass and thus leaves no trace of moisture appearing on the face 3 of the fabric 10. The insulating layer C3 is at least half hydrophobic or even predominantly hydrophobic no longer leaves the liquids on the side of the body of the person, which remain in the space E2 created between the hydrophilic layer C2 and the insulating layer C3, and allows to keep a dry contact after the absorption of liquids, where the insulating function of this third layer C3.

FIGS. 3, 9A and 9B illustrate a second variant embodiment of the multilayer fabric 100 according to the invention corresponding to an improvement of the variant of FIG. 2, namely that it also comprises at least a third textile layer forming an insulating layer C3 juxtaposed with the hydrophilic layer C2 of the basic version of the fabric 1 illustrated in Figure 1, and forming the back side 2 of the fabric 10. This insulating layer C3 also consists of a network of warp and weft son to less for half hydrophobic to predominantly hydrophobic, for example by means of a checkerboard pattern. It is distinct but woven simultaneously with the hydrophobic C1 and hydrophilic C2 layers. It is thus joined to at least one of said hydrophobic C1 and hydrophilic C2 layers by warp and / or weft yarns of at least one of said hydrophilic C2, hydrophobic Cl and C3 insulating layers forming bonding points, assembly being made concomitantly with said weaving.

In the example shown, the assembly of the different layers is carried out according to another scheme. The hydrophilic layer C2 and the insulating layer C3 are joined together by bonding points P3 on the one hand, a bonding point P3 of which is visible on the reverse face of the fabric 100 of FIG. 9B, and the hydrophobic layer C1 and the insulating layer C3 are joined together by binding points P4 on the other hand, a binding point P4 is visible on the reverse side of the fabric 100 of Figure 9A. In this new structure, no hydrophilic yarn of the layer C2 rises in the hydrophobic layer C1 and does not appear on the face 3 of the fabric 100 since the binding points P4 are made only with the hydrophobic threads of the hydrophobic layers C1 and C3 further improving the liquid imperviousness of the face of the fabric 100 without impairing breathability. On the other hand, the binding points P3 make the hydrophilic threads of the hydrophilic layer C2 rise in the insulating layer C3, promoting the absorption of the liquids in the hydrophilic layer C2 by capillarity through these binding points P3, and completing the absorption capacity of the liquids of this insulating layer C3 due to the presence of hydrophilic threads in said insulating layer C3. As in the previous example, the density of the insulating layer C3 is lower and at most equal to the density of the hydrophobic layer C1. It is possible to choose a ratio of the chain-wire density of the hydrophobic layer C1 to the density of the chain yarns of the insulating layer C3 between 1 / 0.2 and 1/1, and a ratio of the weft density of the hydrophobic layer C1 to the weft density of the insulating layer C3 between 1 / 0.4 and 1/1.

The hydrophobic and hydrophilic threads constituting the multilayer fabric 100 according to this second embodiment are identical to those described with reference to the basic version according to FIG. 1. As are the ranges of metric numbers of said threads, and the number of work points. binding per centimeter of warp and weft.

Of course, it is still possible to provide an alternative embodiment of the multilayer fabric 1000 according to the invention, intermediate between that shown in Figure 2 and that shown in Figure 3, as shown in Figure 4, in which the layers C1 hydrophobic and hydrophilic C2 are assembled together as in the basic version of the fabric 1 by the binding points Pl and the insulating layer C3 is assembled to the layer C2 by other binding points P5. Possibilities of industrial application: An industrial embodiment of a multilayer fabric 1 based on the basic version illustrated in Figure 1 is given below by way of illustration of the invention and allowed the manufacture of pants. The immediate absorption power of such a fabric 1 reaches 350 cm3 / m2. Figure 8 illustrates this immediate absorption power and its evolution over time.

It is a 145 cm wide finished fabric made of 60 warp yarns and 37 threads (or weft) of weft per linear centimeter on finished fabric. The hydrophobic layer C1 consists of a 45 μm / cm thick Sirospun® 68/2 Nm yarn and a 25/1 / cm 34/1 Nm weft yarn, the two types of yarn being dyed 100% cotton yarns, hydrophobically treated. carbo-fluorinated resins. The hydrophilic layer C2 is made up of a 15-thread / cm 60/1 Nm chain and a 12-thread count of 60/1 Nm, the two types of thread being 100% dyed cotton threads. The layers C1 and C2 are joined together by 1 binding point / cm in warp and weft.

It is clear from this description that the invention achieves the goals, namely a washable fabric and durable, so reusable, promoting the capacity and speed of absorption and resorption rate, without leaving a visible trace no change in the color of the tissue, without leaving a feeling of moisture on the skin after urinary leakage or urination, capable of managing urine-related odors, not counting the other physical properties of said tissue, function of selected additive treatments.

The present invention is not limited to the embodiments described but extends to any modification and / or variant obvious to a person skilled in the art while remaining within the scope of the protection defined in the appended claims, such as the providing additional functionalities by known finishing processes, either on the fabric by coating, printing, impregnation, spraying, grafting, plasma, etc., or on the finished garment in full bath.

Claims (25)

REVENDICATIONS1. A method of manufacturing a multilayer fabric (1, 10, 100, 1000) for making at least partly a garment especially for a person suffering from incontinence, the fabric having a back side (2), corresponding to the inner face of the fabric oriented towards the body of the person, arranged to be permeable to liquids, and a face (3), corresponding to the outer face of the visible fabric and arranged to be breathable and impermeable to liquids from said back side (2), characterized in that a multilayer fabric having at least two layers having different properties, namely at least one hydrophobic layer (C1) arranged to form said surface face (3) of the fabric, is produced on a weaving machine. fabric and consisting of a network of hydrophobic warp yarns and weft yarns, and at least one hydrophilic layer (C2) arranged to form said backside (2) of the fabric and constituted by a network of warp yarns and of hydrophilic weft yarns, said at least two hydrophobic (C1) and hydrophilic (C2) layers being distinct, juxtaposed and assembled together punctually by warp and / or weft yarns of at least one of said layers to form binding points (P1), this assembly being concomitant with said weaving. 2. Method according to claim 1, characterized in that one juxtapose said hydrophilic layer (C2) at least one insulating layer (C3) consisting of a network of warp and weft son at least half hydrophobic, said insulating layer (C3) being distinct and punctually assembled to at least one of said hydrophobic (C1) and hydrophilic (C2) layers by connecting means. 3. Method according to claim 2, characterized in that said insulating layer (C3) is woven separately from said at least two hydrophobic (Cl) and hydrophilic (C2) layers, and in that said insulating layer is assembled ( C3) to at least one of said hydrophobic (C1) and hydrophilic (C2) layers by reported bonding points. 4. Method according to claim 3, characterized in that said reported bonding points are selected from glue dots, heat sealing points, stitches (P2). 5. Method according to claim 2, characterized in that said insulating layer (C3) is woven simultaneously with said at least two hydrophobic (Cl) and hydrophilic (C2) layers, and in that said insulating layer is assembled ( C3) at least one of said hydrophobic (C1) and hydrophilic (C2) layers by warp and / or weft yarns of at least one of said hydrophilic (C2), hydrophobic (Cl) and insulating (C3) layers ) forming bonding points (P3, P4), this assembly being concomitant with said weaving. 6. Method according to any one of the preceding claims, characterized in that the density of the hydrophilic layer (C2) is at most equal to the density of the hydrophobic layer (Cl). 7. Method according to claim 6, characterized in that one chooses a ratio of the density of warp yarns of said hydrophobic layer (Cl) on the warp yarn density of said hydrophilic layer (C2) between 1 / 0.2 and 1/1, and a ratio of the weft density of said hydrophobic layer (C1) to the weft density of said hydrophilic layer (C2) between 1 / 0.4 and 1/1 . 8. Method according to any one of claims 3 to 5, characterized in that the density of the insulating layer (C3) is at most equal to the density of the hydrophobic layer (Cl). 9. Method according to claim 8, characterized in that one chooses a ratio of the density of warp yarns of said hydrophobic layer (Cl) on the warp yarn density of said insulating layer (C3) between 1 / 0.2 and 1/1, and a ratio of the weft density of said hydrophobic layer (C1) to the weft density of said insulating layer (C3) of between 1 / 0.4 and 1/1 . 10. Method according to any one of claims 1 and 5, characterized in that, to assemble two by two said layers (C1, C2, C3) forming said separate multilayer fabric, one forms said binding points (Pl, P3, P4) with the warp yarns and weft yarns of at least one of said layers to create a grid of bonding points extending over the surface of said multilayer fabric and imparting mechanical cohesion thereto. 11. The method of claim 10, characterized in that said binding points are arranged in a pattern selected from the square, the rectangle, the rhombus to form the mesh of said grid. 12. The method of claim 10, characterized in that one forms a number of tie points, between at least two of said layers, between 0.5 and 3 tie points per centimeter of warp and / or weft. 13. multilayer fabric (1, 10, 100, 1000) for making at least partly a textile article such as a garment especially for person suffering from incontinence, the fabric having a back side (2), corresponding to the face internal tissue directed towards the body of the person, arranged to be permeable to liquids, and a face (3), corresponding to the outer face of the visible fabric and arranged to be breathable and impervious to liquids from said face-up, characterized in that it consists of a multilayer fabric (1) obtained by weaving and comprising at least two layers having different properties, having at least one hydrophobic layer (C1) arranged to form said face surface (3) of the fabric and consisting of a network of hydrophobic warp yarns and weft yarns, and at least one hydrophilic layer (C2) arranged to form said backside (2) of the fabric and constituted by a network of warp yarns andhydrophilic weft yarns, said at least two hydrophobic (C1) and hydrophilic (C2) layers being distinct, juxtaposed and assembled together punctually by warp and / or weft threads of at least one of said layers to form dots binding (P1) obtained during weaving. 14. multilayer fabric (10, 100, 1000) according to claim 13, characterized in that it comprises at least one insulating layer (C3), juxtaposed to said hydrophilic layer (C2) and consists of a network of warp yarns and a predominantly hydrophobic weft, said insulating layer (C3) being distinct and punctually assembled to at least one of said hydrophobic (C1) and hydrophilic (C2) layers by connecting means. 15. multilayer fabric (10) according to claim 14, characterized in that said connecting means are reported bonding points selected from glue points, heat-sealing points, stitches (P2). 16. multilayer fabric (100, 1000) according to claim 14, characterized in that said connecting means are bonding points (P3, P4) obtained during weaving. 17. multilayer fabric according to any one of claims 13 to 16, characterized in that the density of the hydrophilic layer (C2) is at most equal to the density of the hydrophobic layer (Cl). 18. Multilayer fabric according to claim 17, characterized in that the ratio of the warp yarn density of said hydrophobic layer (Cl) to the density of yarn of said hydrophilic layer (C2) is between 1 / 0.2 and 1/1, and the ratio of the weft density of said hydrophobic layer (C1) to the weft density of said hydrophilic layer (C2) is between 1 / 0.4 and 1/1. 19. multilayer fabric according to any one of claims 14 to 16, characterized in that the density of the insulating layer (C3) is at most equal to the density of the hydrophobic layer (Cl). 20. Multilayer fabric according to claim 19, characterized in that the ratio of the warp yarn density of said hydrophobic layer (Cl) to the warp yarn density of said insulating layer (C3) is between 1/0, 2 and 1/1, and the ratio of the weft density of said hydrophobic layer (C1) to the weft density of said insulating layer (C3) is between 1 / 0.4 and 1/1. 21. multilayer fabric according to any one of claims 13 and 16, characterized in that said bonding points (Pl, P3, P4) are formed with the warp son and weft son of at least one of said layers for creating a grid of connecting points extending over the surface of said multilayer fabric and imparting mechanical cohesion thereto. 22. Multilayer fabric according to claim 21, characterized in that said binding points are arranged in a pattern selected from the square, the rectangle, the diamond to form the mesh of said grid. 23. multilayer fabric according to claim 22, characterized in that the number of bonding points, between at least two of said layers, is between 0.5 and 3 tie points per centimeter of warp and / or weft. 24. Use of said multilayer fabric (1, 10, 100, 1000) according to any one of claims 13 to 23, having a back face (2) arranged to be permeable to liquids, and a face (3) arranged to be impervious to liquids from said underside (2) for making at least a portion of a textile article. 25. Use according to claim 24, characterized in that said textile article consists of a garment, in particular for a person suffering from incontinence, composed in part or in full with said multilayer fabric (1, 10, 100, 1000) in which said face (2) corresponding to the inner face of the fabric facing the body of the person, and said face (3) corresponding to the outer face of the visible tissue.