CH720189A2 - 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 (B) characterized in that it is made of a material comprising a flexible polymer (P) and a filler formed by at least one inorganic material (C), the material content inorganic (C) being greater than 10% by weight.

Description

Technical field of the invention

[0001] The invention relates to a flexible composite textile yarn comprising a polymer-based binder and at least one inorganic filler, 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 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 filled textile yarns 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 based on a polymer and loaded with at least one inorganic material, the inorganic material content of which is greater than 10% by weight, and particularly between 10% and 70% 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 made from a flexible polymer material and loaded with at least an inorganic material according to the invention, so as to allow weaving with a yarn 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 made from a flexible polymer material and 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 proposing a flexible, comfortable textile yarn, capable of being easily used by a conventional textile processing method 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 B according to the invention made of flexible polymer material P loaded with at least one inorganic material, here inorganic particles C obtained by an extrusion process according to invention. Figure 2 illustrates two examples of weaving weaves that it is possible to produce by a weaving process according to the invention with a textile yarn A, and a composite textile yarn B loaded with inorganic material, here inorganic particles as illustrated in Figure 1.

Detailed description of the invention

The invention relates to a flexible polymer material loaded with at least one inorganic material.

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.

The invention also relates to an article made of such a composite material comprising a flexible polymer and a filler formed by inorganic particles.

The flexible polymer material loaded with inorganic particles thus comprises two main components which are the inorganic filler, in the form of particles, and the flexible polymer forming the binder. Thus, the material can be termed as a composite material.

Optionally, the material may include one or more coupling agents if the physicochemical interaction between the inorganic filler and the flexible polymer is not sufficient depending on the type of application.

[0030] Optionally, the material may also include one or more pigments.

[0031] Optionally, the material may also include one or more antibacterial additives to obtain an anti-odor effect for comfort.

[0032] Optionally, the material may also include diluents and/or plasticizers.

[0033] Optionally the material can also contain cellulosic fibers making it possible to improve comfort, by draining moisture at the skin/material interface to the outside.

The inorganic material may be metallic and/or ceramic.

Preferably, the inorganic material is a ceramic material used for its thermal conductivity properties.

[0036] These may be carbides, nitrides or oxides such as ZrO2, CeO2, ZnO, etc.

[0037] 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.

It may also be several inorganic materials comprising a mixture of metallic and ceramic materials.

The flexible polymer can be an elastomer-based polymer, that is to say it is mixed with another type of polymer, for example a thermoplastic such as a polyamide.

The flexible polymer can consist solely of an elastomer.

The elastomer is for example a thermoplastic elastomer based on block copolymers (TPE).

The elastomer is for example a thermoplastic elastomer based on polyether amide blocks (PEBA).

[0043] For example, the polymer is a biosourced polymer of renewable origin, or at least partially biosourced. For example, the polymer may comprise blocks of polyamide 11.

The elastomer is for example a thermoplastic elastomer with a mechanical mixture of a thermoplastic polymer and an elastomer.

The elastomer is for example a thermoplastic elastomer with a mechanical mixture of a thermoplastic polymer and a TPO-O or TPO, TPE-V or TPV elastomer.

The elastomer is for example a silicone material or even a vulcanized rubber, for example an ethylene-propylene-diene monomer rubber (EPDM) or a natural rubber. In the case of natural rubber, we will favor a deproteinized natural rubber in order to avoid allergies.

The elastomer advantageously has a hardness of between 30 shore A and 85 shore A.

Preferably, the elastomer has a hardness of between 65 shore A and 75 shore A.

Preferably, the elastomer has a hardness of 75 shore A.

The content by weight of the inorganic filler in the flexible polymer material is greater than 10%.

[0051] The content by weight of the inorganic filler in the flexible polymer material can go up to 70% or even 80% by weight with this manufacturing method according to the invention. Beyond that with known elastomers, manufacturing problems may be encountered.

[0052] The weight content of the inorganic filler in the flexible polymer material is preferably greater than or equal to 15%

The content by weight of the inorganic filler in the flexible polymer material is preferably greater than or equal to 20%.

The content by weight of the inorganic filler in the flexible polymer material is preferably greater than or equal to 30%.

[0055] The content by weight of the inorganic filler in the flexible polymer material is preferably greater than or equal to 40%.

[0056] The inorganic material, in the form of a powder, forming the filler of the material as well as optionally the coupling agents, pigments, diluents, plasticizers or others, are introduced into the polymer during the process of manufacturing the material flexible polymer in the form of granules.

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

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

[0059] The granules of flexible polymer material with an inorganic filler are manufactured by cutting a rod resulting from an extrusion of the various materials mentioned above which are introduced into an extruder hopper.

[0060] If the material includes a coupling agent, this can first be introduced into the hopper of the extruder either separately or with the polymer granules before introducing the inorganic filler in the form of powder. , (for example a metal and/or ceramic powder) which is subsequently introduced into the extruder. When the coupling agent is introduced separately, it can be introduced in powder form.

Preferably, for good integration of the inorganic material into the mixture, a pre-mixture must be prepared by a high-speed mixing process between the coupling agent and the inorganic material. This pre-mixture can then be fed into a twin-screw extruder in order to be well dispersed in the polymer.

[0062] If the material contains pigments, they can be introduced during extrusion and advantageously in a second step. It is also possible to mix it with the polymer granules just before extrusion.

Process for manufacturing a composite textile yarn from flexible polymer material with an inorganic filler

[0063] The invention also relates to a method of manufacturing a composite textile yarn made from the flexible polymer material loaded with at least one inorganic material described above.

The process for manufacturing a composite textile yarn consists initially of preparing granules of flexible polymer material with an inorganic filler as described above, with a desired inorganic filler content, preferably greater than 10% by weight.

[0065] For the manufacture of a composite textile yarn for the manufacture of a technical textile article having improved thermal conductivity, one can choose for example a PEBA elastomeric polymer mixed with a zirconia powder, the mass content of which is zirconia is 40%, and whose particles have a size between 100 nm and 10 mu.

The composite textile yarn, subsequently called yarn B, is a monofilament obtained by extrusion in the form of a flexible profile, having for example a circular, oval or even polygonal section depending on the needs and technical or aesthetic effects desired for the textile article made from the composite textile yarn according to the invention.

Preferably, the section of wire B is included in a diameter of between 0.2 mm and 2 mm. For this purpose, the extruder die is adapted to obtain the desired profile with the right section and the right diameter.

Below a diameter of 0.2 mm, the wire B obtained will be too fragile due to its high content of inorganic filler, for example ceramic in the given embodiment.

[0069] Beyond a diameter of 2mm, the wire B obtained will be too thick and will cause problems during weaving. It can only be used as a warp thread.

[0070] Preferably, the die is configured to obtain a composite textile yarn, yarn B, with a circular section with a diameter of 0.7 mm in order to maximize surface contacts, particularly to the skin.

[0071] Figure 1 schematically illustrates the section of wire B made of flexible polymer material P loaded with inorganic material C obtained by the extrusion manufacturing process which has just been described.

[0072] The production of a composite textile yarn in flexible polymer material loaded with at least one inorganic material by an extrusion manufacturing process as described makes it possible to overcome the problems of breakage linked to the spinning of the filaments, in particular by the production of wires with larger sections but also by reducing the constraints imposed on the wire during manufacturing.

[0073] Thus, thanks to this method of manufacturing a composite textile yarn, it is possible to significantly increase the content of inorganic filler, and in particular ceramic, without risk of breakage of the yarn during manufacturing or during processing. making a technical textile article by weaving.

Textile implementation method for producing a technical textile article from a composite textile yarn according to the invention

[0074] The technical textile article can be manufactured by a textile processing method, for example by weaving, knitting, braiding, by embroidery, etc.

[0075] According to a first alternative embodiment of a technical textile article, the composite textile yarn B obtained according to the invention is woven with a second identical textile yarn B to form a warp yarn of type B and a weft yarn of type B

[0076] According to a second alternative embodiment of a textile article, the composite textile yarn B obtained according to the invention is woven with a second textile yarn B' obtained in a manner similar to the yarn B, but whose load is different, for example inorganic or other example.

[0077] According to a third alternative embodiment of a textile article, the textile yarn B obtained according to the invention is woven with a more conventional textile yarn, called yarn A, not loaded with inorganic material, for example obtained by spinning with a title of 470 dTex, so as to provide flexibility to the woven textile article and to facilitate weaving.

[0078] The textile yarn A is for example composed of filaments or fibers of synthetic material, for example of thermoplastic polymer.

[0079] For example, textile yarn A is a yarn composed of polyamide filaments or fibers, preferably aliphatic polyamide of renewable origin, such as for example polyamide 11.

[0080] In this third variant, the thread B loaded with inorganic material is preferably used as warp thread and the unfilled thread A is used as weft thread. Thus, the constraints imposed during weaving on the textile yarn B loaded with inorganic material are further minimized. However, the reverse is also possible.

Whatever the weaving variant, the composite textile yarn according to the invention makes it possible to make a technical textile article by conventional weaving methods well known to those skilled in the art.

[0082] Figure 2 illustrates two types of weaving weave that can be produced during the weaving process with a textile yarn A and a textile yarn B loaded with inorganic material. Preferably, the weave is a twill or satin in order to be able to have floats of threads B on threads A and to be able to maximize the apparent surface of threads B to increase the contact surface with the skin.

[0083] Preferably, the inorganic material is a ceramic; however it is possible to vary the nature of the filler in the elastomeric polymer in order to vary the function.

[0084] For example, the inorganic material can be metallic to provide a metallic or pearly effect to obtain an aesthetic effect.

[0085] For example, the inorganic material can be a precious metal.

[0086] Such a process for manufacturing a textile yarn by extrusion also makes it possible to increase the pigment content of a textile yarn, such as for example the phosphorescent pigment content 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.

[0087] To obtain an anti-odor effect for comfort, the elastomeric polymer can also be loaded with an antibacterial additive.

[0088] 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.

[0089] Whatever the alternative embodiment, the inorganic material, here inorganic particles, is always coated in the polymer material which makes it possible to overcome the problems of irritation of the skin because the inorganic material is not not directly in contact with the user's skin.

[0090] The material according to the invention also makes it possible to provide an additional function to the article, such as for example the increase in thermal conductivity with the use of ceramic particles in the material.

Claims (17)

1. Composite textile yarn (B) characterized in that it is made of a material comprising a flexible polymer (P) and a filler formed by at least one inorganic material (C), the content of inorganic material (C) being greater at 10% by weight. 2. Composite textile yarn (B) according to the preceding claim characterized in that the material comprises a content of inorganic material (C) greater than 15% by weight, preferably greater than 20% by weight, preferably greater than 30% by weight, preferably greater than 40% by weight. 3. Composite textile yarn (B) according to one of the preceding claims characterized in that said at least one inorganic material (C) is in the form of particles or fibers, 4. Composite textile yarn (B) according to one of the preceding claims characterized in that said at least one inorganic material (C) is in the form of metallic and/or ceramic particles. 5. Composite textile yarn (B) according to one of the preceding claims characterized in that the flexible polymer (P) is based on elastomer. 6. Composite textile yarn (B) according to one of the preceding claims characterized in that the flexible polymer (P) is an elastomer 7. Composite textile yarn (B) according to one of claims 5 to 6 characterized in that the elastomer is a thermoplastic elastomer, a silicone material, or a vulcanized rubber, or a natural rubber. 8. Composite textile yarn (B) according to one of claims 5 to 7 characterized in that the elastomer has a hardness of between 30 shore A and 85 shore A, preferably between 65 shore A and 75 shore A, preferably equal to 75 shore A. 9. Composite textile yarn (B) according to one of the preceding claims, characterized in that it is an extruded monofilament. 10. Composite textile yarn (B) according to one of the preceding claims, characterized in that it is an extruded monofilament having a section included in a diameter of between 0.2 mm and 2 mm. 11. Process for manufacturing a composite textile yarn (B) according to one of the preceding claims, characterized in that it comprises: – a step of supplying the basic materials of the material comprising a flexible polymer (P) and a filler formed by at least one inorganic material (C), the content of inorganic material (C) being greater than 10% by weight; – a step of extruding a monofilament from a molten mixture of the base materials of the material. 12. Method of manufacturing a composite textile yarn (B) according to the preceding claim, characterized in that the supply step is a step of preparing granules of material comprising a flexible polymer (P) and a filler formed by at less one inorganic material (C), the content of inorganic material (C) being greater than 10% by weight, preferably greater than 15% by weight, preferably greater than 20% by weight, preferably greater than 30% by weight, preferably greater at 40% by weight. 13. Method for producing a technical textile article using at least one composite textile yarn (B) according to one of claims 1 to 10. 14. Process for textile implementation of a technical textile article according to the preceding claim, characterized in that the process for textile implementation is a weaving, knitting, braiding or embroidery process. 15. Method of 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 (B) according to one of claims 1 to 10 forming the warp thread and a second composite textile thread (B) according to the same claims forming the weft thread. 16. Process for textile production of a technical textile article according to claim 14 characterized in that the process is a process for weaving a first composite textile yarn (B) according to one of claims 1 to 10 forming the warp thread and a second textile thread without inorganic filler or having a different filler from the first textile thread, forming the weft thread. 17. Technical textile article obtained by the textile processing method according to one of claims 13 to 16.