CN111091922A

CN111091922A - Elastic conductive wire and manufacturing method thereof

Info

Publication number: CN111091922A
Application number: CN201911335372.9A
Authority: CN
Inventors: 宋泽铭; 梁海朝; 何蕾
Original assignee: Jiaxing Jizhan Technology Co Ltd
Current assignee: Jiaxing Jizhan Technology Co Ltd
Priority date: 2019-12-23
Filing date: 2019-12-23
Publication date: 2020-05-01

Abstract

The invention discloses an elastic conductive wire and a manufacturing method thereof. The elastic conductive wire comprises a conductive stretchable braided structure and an elastic insulating layer used for wrapping the braided structure, wherein the braided structure is formed by braiding braided strands through a knitting process, the braided strands are composed of conductive wires and non-conductive wires, and the non-conductive wires comprise elastic wires and/or non-elastic wires. The elastic conductor wire has the advantages of flexibility, stretchability, high conductivity, stable resistance, good insulativity, good elasticity, small diameter, high reliability, uniform wiring and the like, and can be widely applied to the fields of intelligent wearing, medical health, sports and the like.

Description

Elastic conductive wire and manufacturing method thereof

Technical Field

The invention relates to a conductive wire manufacturing technology in the technical field of intelligent wearing, in particular to an elastic conductive wire and a manufacturing method thereof.

Background

With the development of the internet of things and wearable technology, flexible and retractable devices are the mainstream trend of the development of future electronic devices. Among them, the elastic conductive wire is a key material for the development of flexible devices, and has been receiving wide attention in recent years. In the prior art, devices such as a detection and control chip, a sensor and the like are generally woven into each part of clothes, so that parameters such as heartbeat, body temperature, respiratory frequency and the like of a person are detected and obtained, and the control chip processes various detection data. Because need data link between each device, so still need set up the conductor wire in intelligent clothing, current conductor wire compliance is not enough, influences the comfort level of clothing when installing in the clothing to because the clothing produces the tensile easily when wearing, taking off, lead to the life of conductor wire shorter, thereby influence the use of intelligent clothing.

In recent years, intelligent wearing becomes a hotspot of development of the science and technology industry, and in connection and wiring of wearable electronic equipment, the conductive connecting piece needs to meet the requirements of miniaturization, good elasticity, high conductivity and the like, which are related to the stability and reliability of electric signal transmission. The conductive materials of the existing intelligent textiles have a plurality of forms, the stretchable conductive wires in the market are mostly fiber surface plated metal particles, metal compounds, carbon powder or elastic conductive rubber, and have the problems of poor insulating property, complex production process, high production cost and the like. And on the premise of realizing stretchability, the existing elastic conductive wire can not meet the requirements of small diameter and low resistivity at the same time. The existing elastic conductive wire can provide certain conductive performance, but does not have good insulativity, and cannot be widely applied to connection of devices such as flexible batteries, sensors, micro chips and the like. And traditional metal wire and circuit board's pliability is poor, and the elastic recovery rate is low, can not bear great tensile, and fatigue resistance is poor, and its travelling comfort and reliability can not reach the requirement after applying to wearable electronic equipment.

Disclosure of Invention

The invention aims to solve the primary technical problem of providing an elastic conductive wire which is flexible, stretchable, stable in resistance, good in insulation and small in diameter, and is conveniently and flexibly applied to wearable equipment.

Another object of the present invention is to provide a method for manufacturing an elastic conductive wire.

In order to achieve the purpose, the invention adopts the following technical scheme:

according to a first aspect of embodiments of the present invention, there is provided an elastic conductive thread comprising an electrically conductive, stretchable braided structure and an elastic insulating layer for encasing the braided structure, the braided structure being braided by a knitting process from braided strands consisting of conductive filaments and non-conductive filaments, the non-conductive filaments comprising elastic filaments and/or non-elastic filaments.

With reference to the first aspect, in a first possible implementation manner, the braided structure is a cylindrical structure formed by continuously braiding the braided strand in a manner that a plurality of knitted loops are braided in one row, where the braided strand is specifically composed of a plurality of conductive filaments, elastic filaments, and non-elastic filaments.

With reference to the first aspect, in a second possible implementation manner, the braided structure is a flat strip-shaped structure formed by continuously braiding the braided strand with elastic filaments as core filaments by using a bidirectional flat knot braiding process, where the braided strand specifically consists of a plurality of conductive filaments and non-elastic filaments.

Preferably, the elastic yarn is placed in tension by a certain pulling force during the knitting process, and the overall diameter of the knitted strand is equivalent to the overall diameter of the elastic yarn.

With reference to the first aspect, in a third possible implementation manner, the braided structure is a long structure formed by continuously braiding the braided strand based on a warp knitting structure in a knitting process, where the braided strand specifically includes a plurality of conductive filaments and elastic filaments, and the warp knitting structure includes one or more of a chain knitting structure, a warp flat structure, a warp satin structure, a double warp flat structure, a rib warp flat structure, a variable warp satin structure, and a double rib warp flat structure.

Preferably, the elastic yarn is twisted with the conductive yarn to form a braided strand after being in a stretched state by a certain pulling force given to the elastic yarn in the braiding process.

With reference to the first aspect and any one of the three manners, preferably, the elastic insulation layer is made of one or more of silicone rubber, natural rubber, eucommia-natural rubber, egg white rubber, a fiber/rubber composite material, synthetic rubber, resin, animal-like protein, a styrene-based thermoplastic elastomer, a styrene-isoprene-styrene block copolymer, an ethylene-butylene copolymer, an ethylene-propylene-diene monomer, a polyolefin elastomer, a thermoplastic elastomer TPE, a thermoplastic ethylene-propylene-diene monomer dynamic vulcanized rubber, a polyolefin thermoplastic elastomer, a main thermoplastic polyurethane elastomer rubber, a thermoplastic polyester elastomer, polypropylene, and an elastic material.

With reference to the first aspect and any one of the three aspects described above, preferably, the conductive filament is made of one or more of a metal conductive filament, a carbon black conductive filament, a metal compound conductive filament, and a polymer conductive filament.

With reference to the first aspect and any one of the three aspects, preferably, the elastic yarn is spandex yarn, polyurethane yarn, polyolefin yarn, rubber yarn, silicone yarn, polyester yarn, polyamide yarn, or protein yarn.

In combination with the first aspect and any one of the three aspects, preferably, the non-elastic yarn is one or more of a polyester yarn, a cotton yarn, an embroidery yarn, a wool yarn, a roving yarn, a worsted cotton, a linen yarn, an artificial yarn, a silk yarn, a polyethylene monofilament, a sewing yarn, a nylon yarn, a linen yarn, a bulked yarn and a textile yarn.

According to a second aspect of embodiments of the present invention, there is provided a method of manufacturing the elastic conductive wire according to the first aspect, the method may include: plying conductive filaments and non-conductive filaments into a braided strand, the non-conductive filaments comprising elastic filaments and/or non-elastic filaments; knitting the braided strands into an electrically conductive stretchable braided structure by a knitting process; and coating an elastic insulating layer on the surface of the braided structure to obtain the elastic conductive wire.

With reference to the first aspect, in a first possible implementation manner, the knitting of the braided strands into an electrically conductive stretchable braided structure by a knitting process includes: the method comprises the steps of continuously weaving the braided strand to form a cylindrical braided structure in a mode of weaving a plurality of knitted loops in a row, wherein the braided strand is composed of conductive wires, elastic wires and non-elastic wires.

With reference to the first aspect, in a second possible implementation, the knitting of the braided strands into an electrically conductive stretchable braided structure by a knitting process includes: the method is characterized in that a bidirectional plain knot weaving process is adopted, elastic wires are used as core wires, the braided compound wires are continuously woven to form a flat strip-shaped weaving structure, and the braided compound wires are specifically composed of conductive wires and non-elastic wires.

Preferably, the elastic yarn is placed under tension during the knitting process, and the overall diameter of the knitted strand is equal to the overall diameter of the elastic yarn.

With reference to the first aspect, in a third possible implementation manner, the knitting yarn is continuously knitted by using a latch needle, a grooved needle or a crochet needle to form a long-strip-shaped knitting structure based on a warp knitting structure in a knitting process, wherein the knitting yarn specifically comprises conductive filaments and elastic filaments, and the warp knitting structure comprises one or more of a chaining structure, a warp flat structure, a satin structure, a double warp structure, a rib warp flat structure, a variation warp satin structure and a double rib warp flat structure.

Preferably, the method of plying the conductive and non-conductive filaments into a braided strand comprises: and giving a certain pulling force to the elastic yarn to enable the elastic yarn to be in a stretching state and then stranding the elastic yarn and the conductive yarn into a braided strand.

According to the technical scheme, the invention has the beneficial effects that:

the elastic conductor wire has the advantages of flexibility, stretchability, high conductivity, stable resistance, good insulativity, good elasticity, small diameter, high reliability, uniform wiring and the like, and can be widely applied to the fields of intelligent wearing, medical health, sports and the like.

Specifically, the method comprises the following steps:

(1) the flexible of the conductive wire can be realized. The wire has certain elastic recovery performance and is more flexibly applicable to wearable equipment.

(2) Has stable resistance. The existing conductive wire applied to the textile and clothing process is mainly plated with metal powder on the surface of fiber, the conductive wire of a plating layer has poor water-washable performance, and the problem of falling off of the metal powder after stretching or washing exists, so that the resistance is increased, and effective signal transmission cannot be realized. The invention adopts continuous conductive wires such as metal filaments, so that the resistance is stable and the conductivity is high.

(3) Has good insulation property. The elastic insulating material is adopted as an outer package, so that the good insulativity of the conducting wire is realized while the elasticity and the conductivity of the conducting wire are kept.

(4) The diameter is small. Compared with the commonly used lead, the elastic lead has the advantage of small diameter. The existing lead is generally composed of a conductive metal wire wrapped by an insulating layer, the wire diameter is large, the lead has certain hardness and can not be stretched, the diameter of the elastic conductive wire can be controlled to be between 1mm and 40mm, particularly to be less than or equal to 2mm, the elastic conductive wire can be applied to a wearable product by combining with a corresponding textile garment process, and further support is provided for an intelligent wearable technology.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below.

FIG. 1-1 is a schematic view of the structure of an elastic conductive wire in example 1 of the present invention;

figures 1-2 are schematic cross-sectional views of braided strands in one implementation of example 1 of the present invention;

figures 1-3 are schematic cross-sectional views of braided strands in another implementation of example 1 of the invention;

figures 1-4 are schematic cross-sectional views of braided strands in yet another implementation of example 1 of the present invention;

fig. 2-1 is a schematic structural view of an elastic conductive wire in an implementation manner of embodiment 2 of the present invention;

figure 2-2 is a schematic cross-sectional view of a braided strand in one implementation of example 2 of the present invention;

FIGS. 2 to 3 are schematic views showing the knitting steps of the bidirectional plain knitting process according to example 2 of the present invention;

fig. 2 to 4 are schematic structural views of elastic conductive wires in another implementation manner of embodiment 2 of the present invention;

FIG. 3-1 is a schematic view of the structure of an elastic conductive wire in example 3 of the present invention;

figure 3-2 is a schematic cross-sectional view of a braided strand in one implementation of example 3 of the present invention;

fig. 4 is a schematic flow chart of a method for manufacturing an elastic conductive wire according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the above-described drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

The following are detailed descriptions of the respective embodiments.

On the one hand, the embodiment of the invention provides the flexible conductive wire which is flexible, stretchable, stable in resistance, good in insulating property and small in diameter. The elastic conductive wire comprises a conductive stretchable braided structure and an elastic insulating layer used for wrapping the braided structure, wherein the braided structure is formed by braiding braided strands through a knitting process, the braided strands are composed of conductive wires and non-conductive wires, and the non-conductive wires comprise one or two of elastic wires and non-elastic wires. The materials and characteristics that can be used for the respective components are as follows.

In some implementations, the conductive filament is made of one or more of a metal-based conductive filament, a carbon black-based conductive filament, a metal compound-type conductive filament, and a polymer conductive filament.

In some implementations, the elastic filament is a spandex filament, a polyurethane filament, a polyolefin filament, a rubber filament, a silicone filament, a polyester filament, a polyamide filament, or a protein filament.

In some implementations, the non-elastic yarn is one or more of a polyester yarn, a cotton yarn, an embroidery yarn, a wool yarn, a roving wool yarn, a worsted cotton, a linen yarn, a rayon yarn, a silk yarn, a polyethylene monofilament, a sewing yarn, a nylon yarn, a hemp yarn, a bulked yarn, and a textile yarn.

In some implementations, the elastic insulation layer may be made of one or more of silicone rubber, natural rubber, eucommia-natural rubber, egg white rubber, fiber/rubber composite material, synthetic rubber, resin, animal-like protein, styrene thermoplastic elastomer, styrene-isoprene-styrene block copolymer, ethylene-butylene copolymer, ethylene propylene diene monomer, polyolefin elastomer (POE), thermoplastic elastomer (TPE), thermoplastic ethylene propylene diene monomer dynamic vulcanizate, polyolefin thermoplastic elastomer, main thermoplastic polyurethane elastomer rubber, thermoplastic polyester elastomer, and polypropylene-ethylene elastomer.

The knitting structure of the elastic conductive wire of the embodiment of the invention can have a plurality of different knitting modes, and the following is further detailed through a plurality of embodiments.

[ example 1 ]

The elastic conductive wire of the embodiment comprises conductive wires, non-conductive wires and an elastic insulating layer, wherein the non-conductive wires comprise elastic wires and non-elastic wires; the conductive wires and the non-conductive wires form braided strands, the braided strands are braided into a cylindrical long-strip-shaped braided structure through a knitting process to form the conductive wires, and the elastic insulating layer is processed and fixed to form the elastic conductive wire of the embodiment.

Fig. 1-1 is a schematic structural diagram of an elastic conductive wire in an example of a specific application scenario. The implementation mode is that a plurality of conductive wires, a plurality of elastic wires and a plurality of non-elastic wires form a braided strand 1, a plurality of knitting coils are braided in a row continuously through a knitting and braiding process, the braided strand 1 is braided into a conductive wire with a cylindrical braided structure, and an elastic insulating layer 2 is coated on the outer portion of the conductive wire. Wherein, on the premise of not exceeding the requirement of the overall diameter, a plurality of the roots mean at least one, and a plurality of the roots mean at least one.

One implementation mode can adopt a mode of weaving three knitting coils in a row for continuous weaving, the knitting is carried out to form a cylindrical conducting wire, and then the cylindrical conducting wire is processed and fixed into an elastic conducting wire through an insulating outer layer process and an elastic insulating layer.

Optionally, the final diameter of the resilient conductive wire is about 1mm to 40mm, preferably no greater than 2mm, and may be, for example, 1 mm.

As shown in fig. 1-2, which are schematic cross-sectional views of a braided strand in one implementation, the braided strand 1 may be composed of one inelastic filament 103 such as dacron, one elastic filament 102 such as spandex, and three conductive filaments 101 such as copper wires.

As shown in fig. 1-3, which are cross-sectional views of braided strands in another implementation, the braided strand 1 may be composed of an inelastic filament 103 such as polyester, an elastic filament 102 such as spandex, and a conductive filament 101 such as copper.

As shown in fig. 1-4, which are schematic cross-sectional views of a braided strand in yet another implementation, the braided strand 1 may also be composed of one inelastic filament 103, such as dacron, two elastic filaments 102, such as spandex, and six conductive filaments 101, such as copper.

It should be noted that, in different implementations, the number of the elastic wires and/or the conductive wires may be determined according to specific needs.

In the braided compound wire, the conductive wires and the non-conductive wires can be arranged in parallel, in alternate arrangement, in triangular arrangement or in polygonal arrangement.

Wherein, the conductive silk plays the electrically conductive effect. In some implementations, the conductive filament is made of one or more of a metal-based conductive filament, a carbon black-based conductive filament, a metal compound-type conductive filament, and a polymer conductive filament. Optionally, the diameter of the conductive filament ranges from 40um to 1000 um.

The elastic wire has the function of endowing the elastic conductive wire with elasticity, so that the conductive wire can elastically recover within a certain range, and the conductive function of the elastic conductive wire is not influenced. In some implementations, the elastic filament can be spandex filament, polyurethane filament, polyolefin filament, rubber filament, silicone filament, polyester filament, polyamide filament, or protein filament. Optionally, the diameter of the elastic wire ranges from 0.5um to 1000 um.

The non-elastic wires play a role in protecting the conductive wires, friction between the conductive wires and between the elastic wires and the conductive wires is reduced, and the conductive wires are prevented from being broken in the process of back-and-forth stretching recovery. In some implementations, the non-elastic yarn is one or more of a polyester yarn, a cotton yarn, an embroidery yarn, a wool yarn, a roving wool yarn, a worsted cotton, a linen yarn, a rayon yarn, a silk yarn, a polyethylene monofilament, a sewing yarn, a nylon yarn, a hemp yarn, a bulked yarn, and a textile yarn. Optionally, the diameter of the non-elastic filament ranges from 100um to 2000um, and preferably the diameter of the non-elastic filament is larger than that of the conductive filament.

The elastic insulating layer plays a role in protecting the elastic conductive wire, isolates a woven structure for realizing the function of the conductive wire from air, and does not influence the elasticity and the conductivity of the elastic conductive wire. In some implementations, the elastic insulation layer may be made of one or more of silicone rubber, natural rubber, eucommia-natural rubber, egg white rubber, fiber/rubber composite material, synthetic rubber, resin, animal-like protein, styrene thermoplastic elastomer, styrene-isoprene-styrene block copolymer, ethylene-butylene copolymer, ethylene propylene diene monomer, polyolefin elastomer (POE), thermoplastic elastomer (TPE), thermoplastic ethylene propylene diene monomer dynamic vulcanizate, polyolefin thermoplastic elastomer, main thermoplastic polyurethane elastomer rubber, thermoplastic polyester elastomer, and polypropylene-ethylene elastomer. Optionally, the thickness range of the elastic insulating layer is 0.2mm-2 mm.

As described above, this embodiment provides an elasticity conducting wire, and this elasticity conducting wire has characteristics such as the conductivity is high, the resistance is stable, the diameter is little, can stretch, flexibility, can be applied to all kinds of electronic product, especially has certain wearable electronic product that requires to softness, comfort level, stretchability, and the direction of application is extensive.

[ example 2 ]

The elastic conductive wire of the embodiment comprises a conductive wire, a non-conductive wire, a core wire and an insulating layer; wherein, the non-conductive wire adopts non-elastic wire, and the core wire adopts elastic wire; the conductive wires and the non-conductive wires form braided compound wires, the braided compound wires are respectively braided in a left-right continuous mode through a bidirectional plain braiding process in the braiding process to form a flat strip-shaped structure, and then the elastic conductive wires are processed and fixed through the elastic insulating layer. In particular, in the knitting process, an elastic wire (or called as an elastic wire) is used as a core wire, a certain pulling force is given to the elastic wire in the knitting process, so that the elastic wire is kept in a stretching state, and then knitting is performed.

Fig. 2-1 is a schematic structural diagram of an elastic conductive wire in an example of a specific application scenario. The implementation mode is that a plurality of conductive wires and a plurality of non-conductive wires form a braided strand 1, braiding is carried out on the basis of a core wire 2 through a bidirectional flat braiding process, wherein a plurality of elastic wires are used as the core wire 2, a certain pulling force is given to the core wire to keep the core wire in a stretching state, the conductive wires are braided into a flat braided structure through left and right continuous braiding, and an elastic insulating layer 3 is coated on the outer portion of the conductive wires. Wherein, on the premise of not exceeding the requirement of the overall diameter, the plurality of the roots mean at least one. Preferably, the overall diameter of the braided strand 1 is similar or comparable to the overall diameter of the core 2. Preferably, the elastic conductive wire is in the shape of a flat strip.

One realization mode can adopt a spandex elastic wire with the diameter of 0.5mm as a core wire 2, a certain pulling force is given to the core wire 2, the spandex elastic wire is continuously woven left and right through a bidirectional plain-knot weaving process to be woven into a flat-structured conductive wire, and then the conductive wire is fixed into the elastic conductive wire by combining an insulating outer layer process and an elastic insulating layer.

Optionally, the final diameter of the resilient conductive wire is about 1mm to 40mm, preferably no greater than 2mm, and may be, for example, 1.5 mm.

As shown in fig. 2-2, which is a schematic cross-sectional view of a braided strand in one implementation, the braided strand 1 may be composed of one non-conductive filament 102, such as sewing cotton yarn, 10 conductive filaments 101, such as tin-plated copper wire with a diameter of 0.06 mm. It should be noted that, in different implementations, the number of the conductive wires and/or the non-conductive wires may be determined according to specific needs.

As shown in fig. 2-3, which are schematic diagrams of the knitting steps of the bidirectional plain-knot knitting process in one implementation. The weaving process, as shown, includes six steps.

Furthermore, the elastic conductive wire can be transversely woven side by side based on a bidirectional plain knot weaving process, and the purposes of elasticity and high conductivity of the elastic conductive wire can be achieved. Particularly, adjacent strands are mutually wound in the weaving process between two rows of conducting wires, and then the next weaving is carried out.

As shown in fig. 2-4, for an example of such a lateral side-by-side weave, three rows of side-by-side weave structures are shown. This knitting method is based on the structure shown in fig. 2-1, and one core wire is extended three times, thereby realizing three rows of parallel knitting. Alternatively, the diameter of the three rows of side-by-side knitted structures is about 7 mm.

Wherein, the conductive silk plays the electrically conductive effect. In some implementations, the conductive filament is made of one or more of a metal-based conductive filament, a carbon black-based conductive filament, a metal compound-type conductive filament, and a polymer conductive filament. Optionally, the diameter of the conductive filament ranges from 40um to 2000 um.

The elastic wire as the core wire plays a role of endowing the elastic conductive wire with elasticity, so that the conductive wire can elastically recover within a certain range, and the conductive function of the elastic conductive wire is not influenced. In some implementations, the elastic filament is a spandex filament, a polyurethane filament, a polyolefin filament, a rubber filament, a silicone filament, a polyester filament, a polyamide filament, or a protein filament. Optionally, the diameter of the elastic wire ranges from 0.5um to 4000 um.

The non-elastic wires serving as the non-conductive wires play a role in protecting the conductive wires, friction between the conductive wires and the conductive wires is reduced, and the conductive wires are prevented from being broken in the process of back-and-forth stretching recovery. In some implementations, the non-elastic yarn is one or more of a polyester yarn, a cotton yarn, an embroidery yarn, a wool yarn, a roving wool yarn, a worsted cotton, a linen yarn, a rayon yarn, a silk yarn, a polyethylene monofilament, a sewing yarn, a nylon yarn, a hemp yarn, a bulked yarn, and a textile yarn. Optionally, the diameter of the non-elastic filament ranges from 40um to 2000um, and preferably the diameter of the non-elastic filament is larger than that of the conductive filament.

The elastic insulating layer plays a role in protecting the woven structure serving as the conductive wire, the conductive wire formed by the woven structure is isolated from air, and the elasticity and the conductivity of the elastic conductive wire are not affected. In some implementations, the elastic insulation layer may be made of one or more of silicone rubber, natural rubber, eucommia-natural rubber, egg white rubber, fiber/rubber composite material, synthetic rubber, resin, animal-like protein, styrene thermoplastic elastomer, styrene-isoprene-styrene block copolymer, ethylene-butylene copolymer, ethylene propylene diene monomer, polyolefin elastomer (POE), thermoplastic elastomer (TPE), thermoplastic ethylene propylene diene monomer dynamic vulcanizate, polyolefin thermoplastic elastomer, main thermoplastic polyurethane elastomer rubber, thermoplastic polyester elastomer, and polypropylene-ethylene elastomer. Optionally, the thickness range of the elastic insulating layer is 0.2mm-2 mm.

[ example 3 ]

The elastic conductive wire of the embodiment comprises conductive wires, non-conductive wires and an elastic insulating layer; wherein, the non-conductive wire is non-elastic wire; the conductive wires and the non-conductive wires form braided strands, the braided strands are woven into a strip-shaped structure on the basis of warp knitting tissues (such as chain knitting tissues) in a knitting and braiding process to form conductive wires, and the conductive wires are processed and fixed into elastic conductive wires by the aid of elastic insulating layers. In particular, the elastic yarn may be given a certain pulling force during the knitting process to be maintained in a stretched state, and then twisted with the conductive yarn, and then knitted.

It should be noted that the basic structure for weaving the elastic conductive wire is not limited to the chain structure, and in the case of different diameter requirements, the combination mode can use a plurality of warp knitting structures in the weaving process to realize the weaving of elastic conductive wires with different specifications. The warp knitting tissue comprises one or more of chain knitting tissue, warp plain tissue, satin tissue, double warp tissue, rib warp plain tissue, variable warp satin tissue and double rib warp plain tissue.

Fig. 3-1 is a schematic structural diagram of an elastic conductive wire in an example of a specific application scenario. The implementation mode is that a plurality of conductive wires and a plurality of elastic wires form a braided strand 1, the elastic wires are given certain traction force based on the chain knitting tissue in the knitting and braiding process, and then are continuously braided by using a latch needle, a groove needle or a crochet needle to form the conductive wires with strip-shaped structures; and then combining with an insulating outer layer process, coating an elastic insulating layer 2 outside, and processing and fixing the elastic conductive wire. Wherein, on the premise of not exceeding the requirement of the overall diameter, the plurality of the roots mean at least one. Preferably, the elastic conductive wire is in an elongated shape.

As shown in fig. 3-2, which is a schematic cross-sectional view of a braided strand in one implementation, the braided strand 1 may consist of one elastic wire 102, 20 conductive wires 101, for example tin-plated copper wires with a diameter of 0.06 mm. It should be noted that, in different implementations, the number of the elastic wires and/or the conductive wires may be determined according to specific needs.

The elastic wire has the function of endowing the elastic conductive wire with elasticity, so that the conductive wire can elastically recover within a certain range, and the conductive function of the elastic conductive wire is not influenced. In some implementations, the elastic filament is a spandex filament, a polyurethane filament, a polyolefin filament, a rubber filament, a silicone filament, a polyester filament, a polyamide filament, or a protein filament. Optionally, the diameter of the elastic wire ranges from 0.5um to 1000 um.

The elastic insulating layer plays a role in protecting the elastic conductive wire, isolates the elastic conductive wire from air and does not influence the elasticity and the conductivity of the elastic conductive wire. In some implementations, the elastic insulation layer may be made of one or more of silicone rubber, natural rubber, eucommia-natural rubber, egg white rubber, fiber/rubber composite material, synthetic rubber, resin, animal-like protein, styrene thermoplastic elastomer, styrene-isoprene-styrene block copolymer, ethylene-butylene copolymer, ethylene propylene diene monomer, polyolefin elastomer (POE), thermoplastic elastomer (TPE), thermoplastic ethylene propylene diene monomer dynamic vulcanizate, polyolefin thermoplastic elastomer, main thermoplastic polyurethane elastomer rubber, thermoplastic polyester elastomer, and polypropylene-ethylene elastomer. Optionally, the thickness range of the elastic insulating layer is 0.2mm-2 mm.

The structural features of the elastic conductive thread of the present invention have been described above with three embodiments. It should be understood that the above three embodiments are only preferred embodiments of the present invention, and are not limiting, and the elastic conductive wire of the present invention can be implemented in many different ways based on the spirit of the present invention.

Referring to fig. 4, in another aspect of the present invention, a method for manufacturing the elastic conductive wire as described above is further provided, and the method may include the following steps:

s41, stranding conductive wires and non-conductive wires into a braided strand, wherein the non-conductive wires comprise elastic wires and/or non-elastic wires;

s42, weaving the braided strands into an electrically conductive stretchable braided structure through a knitting process;

and S43, coating an elastic insulating layer on the surface of the braided structure to obtain the elastic conductive wire.

Optionally, in one implementation, step S42 weaves the braided strands into an electrically conductive stretchable braided structure through a knitting process, including: the method comprises the steps of continuously weaving the braided strand to form a cylindrical braided structure in a mode of weaving a plurality of knitted loops in a row, wherein the braided strand is composed of conductive wires, elastic wires and non-elastic wires.

Optionally, in one implementation, step S42 weaves the braided strands into an electrically conductive stretchable braided structure through a knitting process, including: the method is characterized in that a bidirectional plain knot weaving process is adopted, elastic wires are used as core wires, the left side and the right side of the braided compound wire are respectively and continuously woven to form a flat strip-shaped weaving structure, and the braided compound wire is specifically composed of conductive wires and non-elastic wires. Further, the elastic filaments may be given a certain pulling force during the knitting process so as to be in a stretched state, and the overall diameter of the knitted strand is comparable to the overall diameter of the elastic filaments.

Optionally, in one implementation, step S42 weaves the braided strands into an electrically conductive stretchable braided structure through a knitting process, including: the knitting structure is characterized in that a long strip-shaped knitting structure is formed by continuously knitting the knitting yarn by using a latch needle, a groove needle or a crochet needle on the basis of a chaining structure in a knitting process, wherein the knitting yarn is specifically composed of conductive yarns and elastic yarns. Furthermore, the elastic yarn can be twisted with the conductive yarn into a braided strand after being in a stretching state by a certain stretching force.

In summary, the embodiment of the invention provides an elastic conductive wire and a manufacturing method thereof. By adopting the technical scheme, the embodiment of the invention has the following beneficial effects:

Specifically, the method comprises the following steps:

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; those of ordinary skill in the art will understand that: the technical solutions described in the above embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. An elastic conductive thread, comprising an electrically conductive, stretchable, braided structure and an elastic insulating layer for encasing the braided structure, the braided structure being formed by braiding braided strands by a knitting process, the braided strands being composed of conductive filaments and non-conductive filaments, the non-conductive filaments comprising elastic filaments and/or non-elastic filaments.

2. Elastic conductive thread according to claim 1,

the knitting structure is a cylindrical structure formed by continuously knitting the knitting plied yarns in a mode of knitting a plurality of knitting coils in a row, wherein the knitting plied yarns are composed of a plurality of conductive yarns, elastic yarns and non-elastic yarns respectively.

3. Elastic conductive thread according to claim 1,

the weaving structure is a flat strip-shaped structure formed by continuously weaving the weaving compound yarn by adopting a bidirectional flat knot weaving process and taking elastic yarns as core yarns, wherein the weaving compound yarn is specifically composed of a plurality of conductive yarns and non-elastic yarns.

4. Elastic conductive thread according to claim 3,

the elastic yarn is placed in tension by being given a certain pulling force during the knitting process, and the overall diameter of the knitted strand is equivalent to the overall diameter of the elastic yarn.

5. Elastic conductive thread according to claim 1,

the weaving structure is a strip-shaped structure formed by continuously weaving the weaving strand yarns on the basis of a warp knitting structure in a knitting process, wherein the weaving strand yarns are composed of a plurality of conductive yarns and elastic yarns, and the warp knitting structure comprises one or more of a chain knitting structure, a warp flat structure, a satin structure, a double warp structure, a rib warp flat structure, a variable warp satin structure and a double rib warp flat structure.

6. Elastic conductive thread according to claim 5,

the elastic yarns are twisted with the conductive yarns into braided strands after being given a certain pulling force in a stretching state in the braiding process.

7. Elastic conductive thread according to any one of claims 1 to 6,

the elastic insulating layer is made of one or more of silica gel, natural rubber, eucommia-natural rubber, egg white rubber, fiber/rubber composite materials, synthetic rubber, resin, animal-like protein, styrene thermoplastic elastomer, styrene-isoprene-styrene block copolymer, ethylene-butylene copolymer, ethylene propylene diene monomer, polyolefin elastomer, thermoplastic elastomer TPE, thermoplastic ethylene propylene diene monomer dynamic vulcanized rubber, polyolefin thermoplastic elastomer, main thermoplastic polyurethane elastomer rubber, thermoplastic polyester elastomer, polypropylene and elastic materials.

8. Elastic conductive thread according to any one of claims 1 to 6,

the conductive wire is composed of one or more of a metal conductive wire, a carbon black conductive wire, a metal compound conductive wire and a polymer conductive wire.

9. Elastic conductive thread according to any one of claims 1 to 6,

the elastic yarn is spandex yarn, polyurethane yarn, polyolefin yarn, rubber yarn, silica gel yarn, polyester yarn, polyamide yarn or protein yarn.

10. Elastic conductive thread according to any one of claims 1 to 6,

the non-elastic yarn is one or more of polyester yarn, cotton yarn, embroidery yarn, wool yarn, woolen yarn, worsted cotton, linen yarn, rayon yarn, silk yarn, polyethylene monofilament, sewing yarn, nylon yarn, hemp yarn, bulked yarn and textile yarn.

11. A method of making the elastic conductive thread of claim 1, comprising:

plying conductive filaments and non-conductive filaments into a braided strand, the non-conductive filaments comprising elastic filaments and/or non-elastic filaments;

knitting the braided strands into an electrically conductive stretchable braided structure by a knitting process;

and coating an elastic insulating layer on the surface of the braided structure to obtain the elastic conductive wire.

12. The method of claim 11, wherein the braiding the braided strands into an electrically conductive stretchable braided structure by a knitting process comprising:

the method comprises the steps of continuously weaving the braided strand to form a cylindrical braided structure in a mode of weaving a plurality of knitted loops in a row, wherein the braided strand is composed of conductive wires, elastic wires and non-elastic wires.

13. The method of claim 11, wherein the braiding the braided strands into an electrically conductive stretchable braided structure by a knitting process comprising:

the method is characterized in that a bidirectional plain knot weaving process is adopted, elastic wires are used as core wires, the braided compound wires are continuously woven to form a flat strip-shaped weaving structure, and the braided compound wires are specifically composed of conductive wires and non-elastic wires.

14. The method of claim 13,

the elastic yarn is given a certain pulling force during the weaving process so as to be in a stretching state, and the overall diameter of the weaving strand is equivalent to that of the elastic yarn.

15. The method of claim 11,

the knitting structure is characterized in that a long strip-shaped knitting structure is formed by continuously knitting the knitting yarn by using a latch needle, a groove needle or a crochet needle on the basis of a chaining structure in a knitting process, wherein the knitting yarn is specifically composed of conductive yarns and elastic yarns.

16. The method of claim 15, wherein plying the conductive filaments and the non-conductive filaments into a braided strand comprises:

and giving a certain pulling force to the elastic yarn to enable the elastic yarn to be in a stretching state and then stranding the elastic yarn and the conductive yarn into a braided strand.