CH720187A2 - Composite textile yarn, process for manufacturing such a composite textile yarn, textile article made from such composite textile yarns. - Google Patents

Abstract

One aspect of the invention relates to a composite textile yarn (10) comprising a core (A) formed by a textile yarn obtained by spinning and a coating (B) composed of a polymer (P) and embedded inorganic particles (C). in the polymer (P). The invention also relates to a method for manufacturing a composite textile yarn (10) by coating a textile yarn (A) produced by spinning. The invention also relates to a method, in particular for weaving from composite textile yarns (10) for the manufacture of a technical textile article. The invention also relates to a technical textile article obtained by weaving.

Description

Technical field of the invention

[0001] The invention relates to a flexible composite textile yarn comprising a polymer coating loaded with at least one inorganic material, for example metallic and/or ceramic.

[0002] The invention relates to a method of manufacturing such a composite textile yarn for making a textile product.

[0003] The invention also relates to a textile implementation method, for example weaving, using such a composite textile yarn for the production of a textile product.

[0004] The invention also relates to a textile bracelet for a wristwatch based on composite textile threads according to the invention and manufactured by such a weaving process.

Technology background

[0005] The use of inorganic technical yarns can provide specific and very interesting functions to textiles compared to the use of more traditional textile yarns (i.e. yarns based on natural, artificial or synthetic fibers).

[0006] For example, the use of ceramic yarn makes it possible to improve the thermal conductivity properties of the textile and to facilitate thermal exchanges between the body and the external environment.

[0007] However, the use of ceramic textile threads worsens the comfort of wearing the textile because these ceramic threads are abrasive and irritate the skin.

[0008] To remedy this drawback and this discomfort caused by the ceramic threads, it has been proposed to cover these ceramic threads with a textile sheath chosen to provide comfort. However, the fibers of these comfort textile sheaths are thermally insulating, which reduces the heat exchange benefit provided by the ceramic yarns.

Another solution consists of manufacturing textile yarns based on synthetic fibers loaded with inorganic particles, for example, particles of ceramic, carbon, or various metals.

However, the content of these inorganic particles does not exceed 10% by weight of the textile yarn because beyond that the loaded filament is too fragile to manufacture a yarn by spinning.

[0011] Indeed, the process of spinning fine synthetic yarns (for example less than 500 dtex) requires numerous mechanical operations with significant constraints imposed on the filaments, which leads to significant breakages if the inorganic material content of these filaments is greater than 10% by weight.

[0012] Furthermore, the tensions imposed during weaving are also an obstacle to the use of synthetic threads loaded with inorganic material with a content greater than 10% by weight.

[0013] Consequently, with such a charged textile yarn obtained by spinning, the ceramic content is too low to significantly provide interesting thermal conductivity to the textile.

[0014] Consequently, there is a need to improve technical textile articles.

Summary of the invention

Consequently, the present invention aims to propose a new process for manufacturing a composite textile yarn comprising at least one inorganic material, the content of inorganic particles of which is greater than 10% by weight of the yarn.

[0016] The inorganic material can be in the form of particles, fibers, etc.

[0017] The invention also aims to propose a textile implementation method, for example weaving, for the production of a technical textile article from a composite textile yarn according to the invention whose inorganic material content is greater than 10%, preferably between 10 and 80% by weight.

[0018] The invention also relates to a composite textile yarn loaded with inorganic material, for example ceramic particles, having a high content of inorganic material in order to provide an interesting function to the textile, while providing a flexible, comfortable textile yarn. , and capable of being easily implemented by a conventional textile processing process for the manufacture of a technical textile article.

[0019] The invention also relates to a technical textile article produced by the textile implementation method according to the invention, for example a watch strap.

[0020] The invention finds a particularly interesting application in the field of watchmaking; however the invention is not limited to such an application.

[0021] For example, the invention is also applicable to the field of technical clothing, technical equipment, etc.

The different aspects, characteristics and advantages of the invention are described in the claims as well as in the following description.

Brief description of the figures

[0023] Figure 1 schematically illustrates the section of a composite textile yarn 10 according to the invention comprising a core A coated with a polymer material P loaded with at least one inorganic material, here inorganic particles C, the composite textile yarn 10 being obtained by a coating process according to the invention.

Detailed description of the invention

The invention relates to a composite textile yarn 10 comprising a core A formed by a conventional textile yarn, which is coated with at least one inorganic material, for example inorganic particles C, embedded in a dispersion, so as to provide particularities specific to conventional textile yarn A at its surface level by the addition of inorganic particles C, while retaining the flexibility properties of a conventional textile yarn and the ease of manufacturing by spinning of textile yarn A.

The inorganic material may be in the form of particles, fibers, etc.

In the example which will be detailed below, the inorganic filler is in the form of particles.

Preferably, the inorganic particles are ceramic particles; however, it is possible to vary the nature of the particles in the coating in order to provide various and varied properties to the composite textile yarn 10 according to the invention.

[0028] The C particles can be phosphorescent in order to have an improved night light intensity allowing greater visibility at night.

The invention also relates to a method of manufacturing such a composite textile yarn 10.

[0030] The manufacturing process includes a step of supplying or manufacturing by adhoc methods by spinning a textile yarn A.

[0031] For example, the textile yarn A is based on a biosourced polymer of renewable origin, or at least partially biosourced. For example, textile yarn A is made from a polymer comprising blocks of polyamide 11.

[0032] For example, textile yarn A is a polyamide yarn with a density of 470 dtex.

[0033] The manufacturing process comprises a wire coating step making it possible to coat the textile yarn A and to deposit a coating B formed by a polymer material P loaded with at least one inorganic material C. Such a composite textile yarn 10 is illustrated in section by Figure 1.

[0034] The coating advantageously makes it possible to coat the inorganic particles C in a polymer, so that once on the textile thread A, they are not directly in contact with the user's skin. Thus, the user does not feel discomfort and is not irritated by the technical textile article he is wearing.

The coating is carried out by dipping the textile yarn A in a dispersion loaded with inorganic particles whose weight content is greater than 10% and less than or equal to 70% of the coating.

The content by weight of the inorganic particles in the coating is greater than 10%, preferably greater than 15%, preferably greater than 20%, preferably greater than 30%, and preferably greater than 40%.

Preferably, the weight content of the inorganic particles in the coating is between 10% and 80%.

[0038] The coating is characterized so as to obtain a coating B on the textile yarn A which has a content of inorganic particles greater than 10% by weight of the coating, preferably greater than 15%, preferably greater than 20%, preferably greater at 30%, and preferably greater than 40%.

The inorganic particles can be metallic and/or ceramic.

Preferably, the inorganic particles are ceramic particles used for the thermal conductivity properties of the ceramic.

[0041] For the metallic material, it may be a conventional carbon steel, a stainless steel, copper, a copper alloy, titanium, a titanium alloy or even tungsten . Preferably, it is a nickel-free stainless steel.

The inorganic particles can be metallic to provide a metallic or pearly effect to meet an aesthetic need.

[0043] For example, the inorganic particles can be a precious or semi-precious metal.

[0044] For the ceramic material, it may be carbides, nitrides or oxides such as ZrO2, CeO2, ZnO, etc.

[0045] It may also be particles comprising a mixture of metallic and ceramic materials.

The inorganic particles are for example a ceramic powder whose particles have a size between 100 nm and 10 mu.

The inorganic particles are for example a zirconia powder whose particles have a size between 100 nm and 10 mu.

The polymer dispersion P is for example a polyurethane polymer to improve bonding to the textile yarn A.

The dispersion may also include one or more coupling agents if the physicochemical interaction between the inorganic particles C and the polymer P is not sufficient depending on the type of application.

[0050] Optionally, the dispersion can also include one or more pigments to color the coating B and meet an aesthetic need.

[0051] Optionally, the dispersion can also include one or more antibacterial additives to obtain an anti-odor effect for comfort on the coating B of the composite textile yarn.

[0052] Optionally, the dispersion can also include diluents and/or plasticizers.

[0053] By way of example, to carry out the coating, a dispersion of polyurethane loaded with a content of 30% by weight of ceramic particles is used.

[0054] Such a process for manufacturing a composite textile yarn with a coating operation makes it possible to increase the filler, particle or pigment content of a conventional textile yarn.

[0055] Thus, it is also possible to increase the phosphorescent pigment content of a textile yarn to obtain a more intense luminous effect at night than with commercial textile yarns which do not contain more than 10% by weight of pigment.

[0056] To obtain an anti-odor effect for comfort, coating B can also additionally contain an antibacterial additive.

[0057] To improve comfort, coating B may contain cellulosic fibers in order to drain moisture at the interface between the skin and the material, towards the outside.

The composite textile yarn 10 according to the invention can be used by a conventional textile processing method for the production of a technical textile article.

[0059] The technical textile article can be manufactured by a process of weaving, knitting, braiding, embroidery, etc.

Process for weaving a technical textile article from a composite textile yarn according to the invention

[0060] According to a first alternative embodiment of a technical textile article, the composite textile yarn 10 obtained according to the invention is woven with a second identical composite textile yarn 10, according to conventional weaving techniques.

[0061] According to a second alternative embodiment of a textile article, the composite textile yarn 10 obtained according to the invention is woven with a second textile yarn coated with a different coating B' and which comprises a different polymer, different inorganic particles or a different filler to the composite textile yarn 10 so as to combine two technical textile yarns with different properties in the same technical textile article. In this second alternative embodiment, the weaving is also carried out by conventional methods well known to those skilled in the art.

[0062] According to a third alternative embodiment of a textile article, the composite textile yarn 10 obtained according to the invention is woven with an uncoated textile yarn. In this third embodiment, the weaving is also carried out by conventional methods well known to those skilled in the art.

[0063] In addition to the two warp and weft threads described above, it is possible to introduce specific textile threads with different inorganic fillers, or textile threads with other properties in order to combine several technical functions and/or aesthetics in the same technical textile article.

Whatever the textile implementation method chosen, the procedure according to the invention allows the inorganic material, here inorganic particles, to always be coated in the polymer material, which makes it possible to overcome the problems of skin irritation because the inorganic material is not directly in contact with the user's skin.

[0065] The composite textile yarn according to the invention also makes it possible to provide an additional function to a textile article, such as for example increasing the thermal conductivity with the use of ceramic particles coated on the surface of the composite textile yarn. .

Claims (15)

1. Composite textile yarn (10) characterized in that it comprises: – a core (A) formed by a textile yarn obtained by spinning; – a coating (B) composed of a polymer (P) and inorganic particles (C) embedded in the polymer (P). 2. Composite textile yarn (10) according to the preceding claim characterized in that the core (A) is a synthetic textile yarn, preferably a textile yarn based on a biosourced polymer of renewable origin. 3. Composite textile yarn (10) according to one of the preceding claims characterized in that the core (A) is a polyamide yarn. 4. Composite textile yarn (10) according to one of the preceding claims characterized in that the coating (B) secured to the core (A) by coating. 5. Composite textile yarn (10) according to one of the preceding claims characterized in that the coating (B) comprises a content of inorganic particles (C) greater than 10% and less than or equal to 70% by weight of the coating (B ). 6. Composite textile yarn (10) according to one of the preceding claims characterized in that the coating (B) comprises a content of inorganic particles (C) greater than 15% by weight, preferably greater than 20% by weight, preferably greater at 30% by weight, preferably greater than 40% by weight. 7. Composite textile yarn (10) according to one of the preceding claims characterized in that the coating (B) comprises ceramic and/or metallic particles. 8. Composite textile yarn (10) according to one of the preceding claims characterized in that the polymer (P) of the coating (B) is a polymer having coupling properties with the nature of the core (A). 9. Process for manufacturing a composite textile yarn (10) according to one of the preceding claims, characterized in that the process comprises: – a step of supplying or manufacturing a textile yarn (A) by spinning; – a step of coating the textile yarn (A) by dipping in a dispersion comprising a polymer (P) and inorganic particles (C) embedded in the polymer (P); 10. Method for manufacturing a composite textile yarn (10) according to the preceding claim characterized in that the dispersion comprises a content of inorganic particles greater than 10% and less than or equal to 70% by weight of the dispersion. 11. Method for manufacturing a composite textile yarn (10) according to one of the preceding claims characterized in that the dispersion comprises a content of inorganic particles greater than 15% by weight, preferably greater than 20% by weight, preferably greater at 30% by weight, preferably greater than 40% by weight. 12. Method for producing a technical textile article using at least one composite textile yarn (10) according to one of claims 1 to 8. 13. Method of textile implementation of a technical textile article according to the preceding claim, characterized in that the textile implementation method is a weaving, knitting, braiding or embroidery process. 14. Method for textile implementation of a technical textile article according to the preceding claim characterized in that the method is a method of weaving a first composite textile yarn (10) according to one of claims 1 to 8 forming the warp thread and a second composite textile thread (10) according to the same claims forming the weft thread. 15. Technical textile article obtained by the textile processing process, preferably weaving, according to one of claims 12 to 14.