Breathable stretchable textile fabric prepared based on high-flexibility insulated wire

Abstract

The invention discloses a breathable stretchable textile fabric prepared based on a high-flexibility insulated wire. The conductive yarn provided by the invention is composed of a yarn core, a conductive layer and an insulating layer, the wire core is made of chemical fiber filaments; the conductive layer wraps the surface of the wire core in a doubling manner; and the insulating layer is coated on the surface of the conductive layer. The conductive yarn has the characteristics of low resistance, high flexibility and small diameter. The invention further provides a fabric which contains the conductive yarn. The conductive yarns participating in weaving in the fabric can be combined with the fabric in a Z-shaped arrangement mode along the radial direction, the weft direction and the oblique direction of each angle of the fabric, so that the conductive yarns have good tensile property and recovery performance while keeping a flexible routing direction, and in addition, the layout of the conductive yarns can be hidden, so that the conductive yarns can be prevented from being damaged. The circuit and the fabric are integrally formed.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent wearable textiles, and in particular relates to a breathable and stretchable fabric fabric prepared based on highly flexible insulated wires. Background Art

[0002] Smart wearable textiles combine traditional textiles with modern technology, have more functions, and have a wide range of application prospects. In the medical field, they can monitor the wearer's vital signs and detect health problems in a timely manner. In the sports field, they can record sports data and help athletes optimize their training plans. In daily life, they can even adjust the temperature of clothing according to environmental changes to provide the most comfortable wearing experience.

[0003] As a basic component of smart wearable textiles, fabric circuits are usually obtained by weaving conductive yarns into fabrics during fabric preparation. When selecting conductive yarns, conductive yarns without an insulating layer but with a conductive surface and good weaving performance can be selected, or electrical wires coated with an electrical insulating layer can be selected.

[0004] Conductive yarns without an insulating layer but with a conductive surface and good weaving performance, commonly used are chemical fiber filaments with metal particles plated on the surface, chemical fiber filaments mixed with carbon-based conductive powder materials during extrusion, pure blended broken yarns composed of ultra-fine stainless steel fibers, etc., due to the relatively simple yarn structure, this type of material has a thinner diameter and good softness, and can be woven into fabrics through most weaving processes, especially processes such as knitting that require high yarn bending performance. However, since the surface of the wire itself is not insulated, in order to make such fabric circuits maintain electrical stability and waterproofness during use, it is necessary to use waterproof materials to encapsulate the entire fabric after the fabric is formed, which will affect the air permeability and feel of the fabric, such as a textile-based washable conductive material for smart wearables disclosed in CN109291593A.

[0005] However, the electrical conductors coated with the electrical insulation layer were not considered for weaving at the beginning of the design. Therefore, the bending stiffness of the conductors is large and not easy to bend. It is impossible to carry out weaving processes that require high bending performance of the material, such as knitting loop forming processes. Therefore, when knitting and weaving such materials, only the weft insertion structure can be used, resulting in the inability to maintain elasticity when the conductors are distributed along the weft direction of the fabric. For example, CN216514461U discloses a method of weaving electrical conductors in knitted fabrics by weft insertion and arranging them in a Z-shaped routing. The Z-shaped arrangement method can make the electrical conductors that originally do not have tensile elasticity obtain better tensile elasticity in the forward direction of the Z-shaped arrangement, but this weaving method cannot change the forward direction of the Z-shaped arrangement of the electrical conductors in the fabric. Therefore, if the conductors need to be distributed along the weft direction of the fabric, the conductors can only be woven into the fabric in a straight line, and a Z-shaped arrangement cannot be formed, so a large tensile deformation cannot be achieved.

[0006] In order to solve the problem of flexible arrangement of fabric conductors in all directions in the fabric, the existing solution is to first use a weft insertion structure to arrange the electrical conductors in a Z-shaped manner along the radial direction of the fabric into a knitted ribbon. When making wearable fabrics, the conductor ribbons are distributed on the fabric in the form of a designed path, and another piece of fabric is used to sandwich it between the double-layer fabric by sewing or hot pressing. For example, CN114672917A discloses a method for weaving a conductive ribbon, but the use of this conductor ribbon requires manual positioning and wiring, and secondary sewing and hot pressing to fix it, which increases the difficulty of the process flow and quality control. Summary of the invention

[0007] The purpose of the invention is to provide a novel conductive yarn.

[0008] Another object of the present invention is to provide a method for preparing the conductive yarn.

[0009] Another object of the present invention is to provide a fabric containing the conductive yarn.

[0010] Another object of the present invention is to provide a method for weaving the fabric.

[0011] In order to achieve the above object, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a conductive yarn, which is composed of a core, a conductive layer and an insulating layer; The material of the wire core is chemical fiber filament; The conductive layer is wound in parallel on the surface of the wire core; The insulating layer covers the surface of the conductive layer.

[0012] The material of the core is selected from one or more of para-aramid filaments, polyarylate filaments, ultra-high molecular weight polyethylene filaments, high-strength polyester filaments and high-strength nylon filaments. The core has a linear density of <30D.

[0013] The conductive layer is made of conductive filaments with a diameter of <0.05 mm and a single-filament resistance of <100 Ω / m, such as <50 Ω / m.

[0014] The number of parallel lines of the conductive layer is 5-50.

[0015] The material of the insulating layer is selected from polymer resin materials.

[0016] The thickness of the insulating layer is between 0.05-0.1 mm.

[0017] The conductive yarn has a diameter of <0.5 mm, a resistance of <10 Ω / m, and a bending stiffness of <0.02 gf·cm 2 / cm.

[0018] In a second aspect, the present invention provides a method for preparing the above-mentioned conductive yarn, comprising the following steps: (1) Using chemical fiber filaments as the core, wrapping a plurality of conductive filaments on the surface of the core in a parallel winding manner to form a conductive layer; (2) The polymer resin material is coated on the surface of the conductive layer by spinning and extrusion to form an insulating layer, thereby obtaining the conductive yarn.

[0019] In a third aspect, the present invention provides a fabric fabric, comprising a non-circuit area and a fabric circuit area; The non-circuit area is formed by knitting the base yarn; The fabric circuit area is formed by weaving a base yarn, a conductive wire and an elastic recovery yarn; The conducting wire is the above-mentioned conductive yarn.

[0020] Furthermore, the fabric circuit area is divided into an upper layer and a lower layer; the upper layer is formed by weaving basic yarns, and the lower layer is formed by weaving conductive yarns and elastic recovery yarns.

[0021] Furthermore, the conductive yarns are arranged in the fabric along the weft direction, radial direction and obliquely at any angle.

[0022] Furthermore, in the fabric, the elastic recovery yarn is selected from a wrapped yarn and / or a core-spun yarn prepared from one or more elastic fibers selected from polyurethane elastic fibers, polyester elastic fibers and polyolefin elastic fibers.

[0023] Furthermore, in the fabric circuit area, the knitting area of ​​the elastic recovery yarn has one more coil on the left and right sides and one more knitting row on the top and bottom than the knitting area of ​​the conductive yarn, so as to ensure that the conductive yarn coil can be fully recovered after stretching.

[0024] Furthermore, in the fabric, the material of the base yarn is selected from one or more of natural fiber yarn, synthetic fiber filament and regenerated fiber filament.

[0025] In a fourth aspect, the present invention provides a method for weaving the above-mentioned fabric material, comprising: weaving a non-circuit area and weaving a fabric circuit area.

[0026] The weaving structure used in the non-circuit area is one or more of a flat needle structure, a thread structure and a double-sided jacquard structure. The corresponding weaving structure can be selected according to the actual use scenario of the fabric.

[0027] The weaving of the fabric circuit area includes weaving of an upper layer of base yarn, and weaving of a lower layer of conductive yarn and elastic recovery yarn.

[0028] Furthermore, in the weaving of the fabric circuit area, the weaving structure adopted by the weaving of the basic yarn is a single-sided knitted structure, which may be one or more of a single-sided plain needle structure, a single-sided floating thread jacquard structure and a single-sided padding structure.

[0029] Furthermore, the weaving of the fabric circuit area is performed using a flat knitting machine.

[0030] Furthermore, the weaving of the conductive yarn is performed according to one of the following situations: (1) When the conductive yarn is arranged along the weft direction of the fabric, the conductive yarn is woven using a full-needle or alternate-needle loop knitting process, and the previous knitting row and the next knitting row of the knitting area of ​​the conductive yarn are woven using the elastic recovery yarn; (2) When the conductive yarn is arranged radially along the fabric, the conductive yarn is woven by weft insertion or row-by-row single-loop weaving process, and the previous weaving row and the next weaving row of the weaving area of ​​the conductive yarn are woven by the elastic recovery yarn; (3) When the conductive yarn is arranged obliquely at any angle along the fabric, the oblique arrangement is decomposed into a plurality of weft and radial arrangements with different numbers of needles and rows according to the number of horizontal rows woven by the conductive yarn; (4) For fabrics that transmit electrical signals through multiple channels, multiple conductive yarns are arranged in parallel horizontally or vertically in the same fabric circuit area, and share the same elastic recovery yarn in the same fabric circuit area. In addition, multiple conductive yarns can be dispersed from the same fabric circuit area to form a tree-like distribution; the dispersed conductive yarns and the newly added elastic recovery yarns further form a new fabric circuit area.

[0031] Compared with the prior art, the present invention has the following beneficial effects: 1. Compared with traditional electrical wires, the conductive yarn provided by the present invention has the characteristics of low resistance, high flexibility and small diameter. Because it has greater weaving flexibility, it can be knitted into loops using an 18G knitting machine, and the wire will not be seriously damaged or broken, thereby achieving the purpose of knitting coil weaving and integrated molding of circuits and fabrics, meeting the signal transmission and low-voltage energy supply requirements of smart wearable textiles.

[0032] 2. The present invention has developed a method for weaving a fabric circuit that is integrally formed with the fabric based on the knitting technology of a flat knitting machine. Combined with the needle method changes of the flat knitting process, the conductive yarn can be combined with the fabric in a Z-shaped arrangement along the radial direction, weft direction and various oblique angles of the fabric, so that the conductive yarn can maintain a flexible routing direction while having good tensile and recovery properties; at the same time, the layout of the conductive yarn can be hidden to achieve the integrated molding of the circuit and the fabric.

[0033] 3. The fabric provided by the present invention has good air permeability, is washable, has excellent elasticity in all directions, has high freedom in circuit layout, is accurately positioned, and does not require manual wiring. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the longitudinal and transverse structure of the conductive yarn.

[0035] Figure 2 It is a schematic diagram of the structure and weaving direction of knitted fabrics.

[0036] Figure 3 It is a schematic diagram of the arrangement of the fabric circuit area in the cross-sectional direction.

[0037] Figure 4 Schematic diagram of the arrangement of conductive yarns in coil form in the circuit area of ​​the fabric.

[0038] Figure 5 It is a schematic diagram of the knitting structure when the fabric circuit is arranged along the weft direction of the fabric.

[0039] Figure 6 It is a schematic diagram of the knitting structure when the fabric circuit is arranged along the radial direction of the fabric.

[0040] Figure 7It is a schematic diagram of the knitting structure when the fabric circuit is arranged at a 45° angle along the fabric. DETAILED DESCRIPTION

[0041] The present invention will be further described below in conjunction with specific embodiments, but the present invention is not limited to the following embodiments.

[0042] The present invention specifically provides a conductive yarn, which is composed of a core, a conductive layer and an insulating layer; The material of the core is chemical fiber filament. Preferably, the material of the core is selected from one or more of para-aramid filament, polyarylate filament, ultra-high molecular weight polyethylene filament, high-strength polyester filament and high-strength nylon filament. Taking into account the cost and performance, para-aramid filament is further preferred.

[0043] The conductive layer is wrapped around the surface of the wire core in parallel, and the insulating layer is coated on the surface of the conductive layer.

[0044] The present invention uses high-performance chemical fiber filaments as the core, which can make the conductive yarn have a higher tensile breaking strength in the axial direction, ensuring that the conductive yarn will not be stretched or broken due to external forces during fabric weaving and use, thereby ensuring the stability of the conductive yarn. Coating multiple conductive filaments on the surface of the chemical fiber filament in a parallel winding manner can minimize the increase in the wire diameter while achieving multiple coatings, thereby enabling the conductive yarn to obtain a low and stable resistance, and the resistance value should be able to meet the requirements for electrical signal and power conduction in most smart wearable circuits. The conductive layer is physically and electrically isolated from the outside world by an insulating layer, which can prevent the loss of electrical energy and effectively reduce the risk of oxidation and physical damage to metal conductive materials.

[0045] In the present invention, the line density of the core is ≤30D. The present invention selects fine-denier high-strength fibers, which can make the conductive yarn have a strong tensile breaking force even at a thinner diameter, thereby preventing the yarn from breaking during use.

[0046] In the present invention, the conductive layer is made of a flexible conductive filament with a diameter of less than 0.05 mm and a single-filament resistance of less than 100 Ω / m. Preferably, the conductive layer is made of one or more selected from pure copper wire, nickel-plated copper wire, silver-plated nylon with a silver content higher than 50%, pure silver wire, and carbon nanotube filament. Taking into account the cost and performance, nickel-plated copper wire is further preferred.

[0047] In the present invention, the number of parallel threads of the conductive layer is 5 to 50. Studies have shown that increasing the number of parallel threads will reduce the total resistance of the conductive yarn, but will have little effect on the overall flexibility of the conductive yarn.

[0048] In the present invention, the material of the insulating layer is selected from a polymer resin material. Preferably, the material of the insulating layer is selected from one or more of polytetrafluoroethylene resin, polyurethane resin, silicone rubber (liquid silicone rubber) and EPDM rubber. In order to minimize the influence of the insulating material on the flexibility of the wire, preferably, the material of the insulating layer is selected from a polyurethane resin with good flexibility. In the present invention, the polymer resin material is coated on the surface of the conductive layer by spinning extrusion to achieve bonding protection of the conductive yarn.

[0049] In the present invention, the thickness of the insulating layer is between 0.05-0.1 mm.

[0050] In the present invention, the diameter of the conductive yarn is less than 0.5 mm, the resistance is less than 10 Ω / m, and the bending stiffness is less than 0.02 gf·cm 2 / cm.

[0051] The present invention provides a method for preparing the above-mentioned conductive yarn, comprising the following steps: (1) Using chemical fiber filaments as the core, wrapping a plurality of conductive filaments on the surface of the core in a parallel winding manner to form a conductive layer; (2) The polymer resin material is coated on the surface of the conductive layer by spinning and extrusion to form an insulating layer, thereby obtaining the conductive yarn.

[0052] The present invention provides a fabric material, comprising a non-circuit area and a fabric circuit area; The non-circuit area is formed by knitting the base yarn; The fabric circuit area is formed by weaving a base yarn, a conductive wire and an elastic recovery yarn; The conducting wire is the above-mentioned conductive yarn.

[0053] Furthermore, the fabric circuit area is divided into an upper layer and a lower layer; the upper layer is formed by weaving basic yarns, and the lower layer is formed by weaving conductive yarns and elastic recovery yarns.

[0054] The fabric circuit of the present invention is designed as a double-layer structure, the upper layer is woven with basic yarns, and a hidden fabric conductor design can be realized. The lower layer is woven with the above-mentioned conductive yarn and elastic recovery yarn, and the conductive yarn has good flexibility, small diameter, and low resistance, combined with the good recovery of the elastic recovery yarn, so that the conductive yarn can maintain a flexible routing direction while having good tensile performance and recovery performance, thereby realizing the integrated molding of the circuit and the fabric.

[0055] Furthermore, the conductive yarns are arranged in the fabric along the weft direction, radial direction and obliquely at any angle.

[0056] Furthermore, in the fabric, the elastic recovery yarn is selected from a wrapped yarn and / or a core-spun yarn prepared from one or more elastic fibers selected from polyurethane elastic fibers, polyester elastic fibers and polyolefin elastic fibers.

[0057] Furthermore, in the fabric circuit area, the knitting area of ​​the elastic recovery yarn has one more coil on the left and right sides and one more knitting row on the top and bottom than the knitting area of ​​the conductive yarn, so as to ensure that the conductive yarn coil can be fully recovered after stretching.

[0058] The present invention uses yarns with high stretch recovery properties and conductive yarns to weave the fabric circuit area together, and helps the conductive yarns arranged in a zigzag shape to recover to their original size after being stretched, thereby effectively maintaining the flatness of the entire fabric after stretching.

[0059] Furthermore, in the fabric, the material of the basic yarn is selected from one or more of natural fiber yarns, synthetic fiber filaments and regenerated fiber filaments to meet the basic properties of the fabric itself, such as wearing performance and feel. The specific material selection is determined by the use scenario of the fabric.

[0060] Furthermore, in the fabric material, the fabric circuit area connects any two points on the plane of the knitted fabric, that is, from the starting point to the end point of the fabric circuit area.

[0061] Furthermore, the fabric is a weft knitted fabric, which is woven row by row along the weaving direction. Therefore, for the weft knitted fabric, the starting point of the fabric circuit area must be woven earlier than the end point, and on the circuit path from the starting point to the end point, the conductive yarn cannot be arranged against the weaving direction.

[0062] The present invention provides a method for weaving the above fabric, including: weaving a non-circuit area and weaving a fabric circuit area; The weaving structure used in the non-circuit area is one or more of a flat needle structure, a thread structure and a double-sided jacquard structure. The corresponding weaving structure can be selected according to the actual use scenario of the fabric.

[0063] The weaving of the fabric circuit area includes weaving of an upper layer of base yarn, and weaving of a lower layer of conductive yarn and elastic recovery yarn.

[0064] Furthermore, in the weaving of the fabric circuit area, the weaving structure adopted by the weaving of the basic yarn is a single-sided knitted structure, which may be one or more of a single-sided plain needle structure, a single-sided floating thread jacquard structure and a single-sided padding structure.

[0065] Furthermore, the weaving of the fabric circuit area is carried out using a knitting machine; wherein, the weaving of the base yarn uses one needle bed in the knitting machine, and the weaving of the conductive yarn and the elastic recovery yarn uses another needle bed, so that the fabric circuit area can be completely located on the back of the fabric material, realizing a hidden fabric conductor design.

[0066] Furthermore, when the conductive yarn is arranged along the weft direction of the fabric, the weaving of the conductive yarn adopts a full-needle or alternate-needle loop weaving process, and the previous weaving row and the next weaving row of the weaving area of ​​the conductive yarn are woven with the elastic recovery yarn, so that the conductive yarn forms a Z-shaped arrangement in the weft direction, thereby obtaining a larger lateral deformation capacity.

[0067] Furthermore, when the conductive yarn is arranged radially along the fabric fabric, the weaving of the conductive yarn adopts a weft insertion or a row-by-row single-coil weaving process, and the previous weaving row and the next weaving row of the weaving area of ​​the conductive yarn are woven with the elastic recovery yarn, so that the conductive yarn forms a Z-shaped or quasi-Z-shaped arrangement in the radial direction, thereby obtaining a larger radial deformation capacity.

[0068] Furthermore, when the conductive yarn is arranged obliquely at any angle along the fabric, the oblique arrangement can be decomposed into a plurality of weft and radial arrangements with different numbers of needles and rows according to the number of rows woven by the conductive yarn. For example, if one needle is moved horizontally to the right in a knitting row, a fabric circuit inclined at an angle of 45° to the upper right of the fabric can be obtained.

[0069] Furthermore, for fabrics that require multi-channel transmission of electrical signals, multiple conductive yarns can be arranged horizontally or vertically in parallel in the same fabric circuit area, and share the same elastic recovery yarn in the same fabric circuit area, and multiple conductive yarns can be dispersed from the same fabric circuit area to form a tree-shaped distribution; the dispersed conductive yarns can further form a new fabric circuit area with the new elastic recovery yarn. The number of conductive yarns can be determined according to the number of yarn mouths of the knitting machine.

[0070] Example 1 Preparation of weavable conductive yarn: The braidable conductive yarn consists of three parts: a tensile core, a conductive layer and a flexible insulating layer; Material of tensile core: para-aramid filament with line density of 30D; Conductive layer production: 8×0.05mm silver-copper alloy filaments are selected and wrapped side by side on the surface of the tensile wire core to make the total resistance of the wire reach 5Ω / m; Production of the insulation layer: Liquid silicone rubber is used to extrude and coat the wrapped wire, and then heated, cured and wound.

[0071] Fabric preparation: The fabric area includes: non-circuit area and fabric circuit area; Base yarn for non-circuit area: 140D nylon 66DTY filament is used; Knitting structure of non-circuit area: use single-sided plain needle structure, use the front needle bed for knitting, knit from bottom to top, and use one yarn mouth for knitting; Number of conductive yarns in the fabric circuit area: 2 of the above conductive yarns, woven by 2 yarn carriers; Elastic recovery yarn in the fabric circuit area: double-wrapped elastic yarn with 150D spandex monofilament as the core and 2 100D polyester as the sheath, woven by 2 yarn mouths; Distribution of fabric conductors: Initially, two conductive yarns are included in one fabric conductor, and then the two conductors are separated by a separation point and separated to the left and right sides at an angle of 45° upward, forming a longitudinal tree-shaped forked circuit.

[0072] Example 2 Preparation of weavable conductive yarn: The braidable conductive yarn consists of three parts: a tensile core, a conductive layer and a flexible insulating layer; Material of tensile wire core: 25D ultra-high molecular weight polyethylene filament, used as conductor core yarn; Conductive layer material: 100D silver-plated nylon filaments are wound around the core yarn surface, making the total resistance of the conductor reach 10Ω / m; Material of the insulation layer: The above-mentioned wrapping wire is coated with a water-based polyurethane solution with a coating thickness of 0.1 mm, and then dried and rolled; Fabric preparation: The fabric area includes: non-circuit area and fabric circuit area; Base yarn for non-circuit areas: Use two-color 60s / 2 worsted wool yarn; Knitting structure of non-circuit area: using 2-color sesame dot jacquard structure, in the basic yarn knitting area, the front and rear needle beds knit the two-color jacquard structure together, in the conductor area, the front needle bed knits the single-sided floating jacquard, and the corresponding rear needle bed is used for knitting the fabric conductor, which is knitted by 2 yarn mouths; The number of conductive yarns in the fabric circuit area: 1 conductive yarn is woven by 1 yarn mouth, which is A conductive yarn; Elastic recovery yarn in the fabric circuit area: double-wrapped elastic yarn with 100D spandex monofilament as the core and 2 100D nylon as the sheath, woven by 1 yarn mouth, is A elastic recovery yarn; Distribution of fabric conductors: When the fabric is woven from bottom to top, fabric conductor A composed of conductive yarn A and elastic recovery yarn A enters from the left edge of the fabric, is woven horizontally from left to right, and then is woven to the upper right at a 45° inclination angle. When the conductor reaches a certain number of rows, it continues to be woven horizontally to the right to form a complete fabric conductor A. The conductive wire A and elastic recovery yarn A are now located at the right edge of the fabric. Subsequently, the A conductor and the A elastic recovery conductor are woven horizontally from right to left. When they are woven to the weaving column where the right turning point of the fabric conductor A is located, they are woven to the upper left at a 45° inclination angle. When the conductor reaches a certain number of rows, it continues to be woven horizontally to the left to the left edge of the fabric to form a complete fabric conductor B. At this time, the conductive wire A located on the right side of the fabric is cut along the turning point of the cloth edge, forming two completely independent, horizontally mirrored fabric conductors that are separated from the left side of the fabric and merged to the right side of the fabric.

[0073] Test Case The properties of the conductive yarn and fabric obtained in Example 1 and Example 2 were tested, and the results are as follows.

[0074] Table 1 Performance test results of conductive yarn and fabrics

[0075] As shown in Table 1, the conductive yarns prepared in Example 1 and Example 2 have a relatively thin total diameter, lower bending stiffness and resistance, and higher air permeability; among them, the bending stiffness of the conductive yarn prepared in Example 1 is more than twice that of Example 2, and the resistance is only 1 / 2 of that of the conductive yarn in Example 2. By adjusting the conductive yarn structure, different application requirements can be met. At the same time, due to the knitting process, the fabric fabric prepared by the conductive yarn of the present invention has a larger porosity, better air permeability, and a higher radial and weft one-time stretch elastic recovery rate, which shows that the fabric fabric prepared by the conductive yarn of the present invention has excellent all-directional elasticity.

[0076] Table 2 Performance test results of commercially available conductive wires

[0077] It can be seen from Table 2 that the commercially available conductive wires with an insulating layer and a thinner diameter, such as the extra-fine Teflon wire, have a thinner diameter but a relatively large bending stiffness and cannot be woven by knitting; and the commercially available conductive wires with a thinner diameter and a smaller bending stiffness, such as 150D silver-plated nylon, have no insulating layer and cannot meet the electrical performance of the circuit; the commercially available stainless steel heating wire has a lower resistance and meets the electrical performance of the circuit, but has a thicker diameter and a larger bending stiffness and cannot be woven by knitting.

[0078] Compared with the above commercially available conductors, the conductive yarns obtained in Examples 1 and 2 provided by the present invention have lower bending stiffness, electrical resistance and total diameter.

[0079] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A conductive yarn, which consists of a core, a conductive layer and an insulating layer; The material of the wire core is chemical fiber filament; The conductive layer is wound in parallel on the surface of the wire core; The insulating layer covers the surface of the conductive layer.

2. The conductive yarn according to claim 1, characterized in that The material of the wire core is selected from one or more of para-aramid filaments, polyarylate filaments, ultra-high molecular weight polyethylene filaments, high-strength polyester filaments and high-strength nylon filaments; The linear density of the wire core is ≤30D; The conductive layer is made of conductive filaments with a diameter of less than 0.05 mm and a single-filament resistance of less than 100 Ω / m; The number of parallel lines of the conductive layer is 5-50; The material of the insulating layer is selected from polymer resin material; The thickness of the insulating layer is between 0.05-0.1 mm.

3. The conductive yarn according to claim 1 or 2, characterized in that: The conductive yarn has a diameter of <0.5 mm, a resistance of <10 Ω / m, and a bending stiffness of <0.02 gf·cm 2 / cm.

4. The method for preparing the conductive yarn according to any one of claims 1 to 3, comprising the following steps: (1) A chemical fiber filament is used as a core, and a plurality of conductive filaments are wrapped around the surface of the core in a parallel winding manner to form a conductive layer; (2) The polymer resin material is coated on the surface of the conductive layer by spinning and extrusion to form an insulating layer, thereby obtaining the conductive yarn.

5. A fabric material comprising a non-circuit area and a fabric circuit area; The non-circuit area is formed by knitting the base yarn; The fabric circuit area is formed by weaving a base yarn, a conductive wire and an elastic recovery yarn; The conductive wire is the conductive yarn according to any one of claims 1 to 3.

6. The fabric material according to claim 5, characterized in that: The fabric circuit area is divided into an upper layer and a lower layer; The upper layer is formed by weaving basic yarns; The lower layer is formed by weaving conductive yarn and elastic recovery yarn.

7. The fabric material according to claim 5 or 6, characterized in that: The conductive yarns are arranged in the fabric along the weft direction, radial direction and diagonally at any angle; The elastic recovery yarn is selected from a wrapped yarn and / or a core-spun yarn prepared from one or more elastic fibers selected from polyurethane elastic fibers, polyester elastic fibers and polyolefin elastic fibers; The knitting area of ​​the elastic recovery yarn has one more loop on the left and one more knitting row on the top and one more knitting row on the bottom than the knitting area of ​​the conductive yarn; The material of the base yarn is selected from one or more of natural fiber yarn, synthetic fiber filament and regenerated fiber filament.

8. The method for weaving a fabric according to any one of claims 5 to 7, comprising: Weaving in non-circuit areas and weaving in circuit areas of fabric.

9. The weaving method according to claim 8, characterized in that: The knitting structure of the non-circuit area is one or more of a flat needle structure, a thread structure and a double-sided jacquard structure; The weaving of the fabric circuit area includes weaving of an upper layer of base yarn, and weaving of a lower layer of conductive yarn and elastic recovery yarn; The weaving structure of the basic yarn in the weaving of the fabric circuit area is a single-sided knitting structure; The knitting of the fabric circuit area is performed using a flat knitting machine.

10. The weaving method according to claim 9, characterized in that: The weaving of the conductive yarn is performed according to one of the following situations: (1) When the conductive yarn is arranged along the weft direction of the fabric, the conductive yarn is woven using a full-needle or alternate-needle loop knitting process, and the previous knitting row and the next knitting row of the knitting area of ​​the conductive yarn are woven using the elastic recovery yarn; (2) When the conductive yarn is arranged radially along the fabric, the conductive yarn is woven by weft insertion or row-by-row single-loop weaving process, and the previous weaving row and the next weaving row of the weaving area of ​​the conductive yarn are woven by the elastic recovery yarn; (3) When the conductive yarn is arranged obliquely at any angle along the fabric, the oblique arrangement is decomposed into a plurality of weft and radial arrangements with different numbers of needles and rows according to the number of horizontal rows woven by the conductive yarn; (4) For fabrics that transmit electrical signals through multiple channels, multiple conductive yarns are arranged in parallel horizontally or vertically in the same fabric circuit area, and share the same elastic recovery yarn in the same fabric circuit area. In addition, multiple conductive yarns can be dispersed from the same fabric circuit area to form a tree-like distribution; the dispersed conductive yarns and the newly added elastic recovery yarns further form a new fabric circuit area.

Images