A one-piece tricot three-dimensional electric heating fabric

Abstract

The application belongs to the technical field of electric heating materials, and relates to an integrally-formed warp-knitted three-dimensional electric heating fabric. The fabric comprises a base, a first comb-shaped electrode layer and a second comb-shaped electrode layer. The base is a warp-knitted spacer fabric, and comprises a first insulating knitted fabric layer, a second insulating knitted fabric layer and a spacer layer. The spacer layer comprises k heating areas and j non-heating areas which are alternately arranged along the course direction. The two comb-shaped electrode layers are embedded in the upper and lower insulating knitted fabric layers respectively. The first comb-shaped electrode layer comprises a first main stem and n first finger-shaped branches, and the second comb-shaped electrode layer comprises a second main stem and m second finger-shaped branches. The first and second finger-shaped branches are alternately arranged in the projection perpendicular to the plane of the fabric. The electric heating fabric is integrally formed and has the advantages of stable structure, good heating uniformity and high safety.

Description

Technical Field

[0001] This invention belongs to the field of electrothermal materials technology, and relates to an integrally formed warp-knitted three-dimensional electrothermal fabric. Background Technology

[0002] Electric heating fabrics, as flexible functional materials that can convert electrical energy into heat energy, have been widely used in fields such as thermal clothing, physiotherapy and rehabilitation, home heating and industrial insulation, and are an important research direction in the field of electric heating materials technology.

[0003] Traditional electric heating fabrics often employ a single yarn that simultaneously carries current transmission and resistive heating. For example, patent CN111575895B arranges metal yarns on the surface layer of the spacer fabric, and patent application CN111485323A arranges metal yarns on the layer of the spacer fabric. In this type of design, the single yarn is prone to local resistance changes, forming hot spots. Furthermore, the coupling of current transmission and heating behavior can easily lead to a vicious cycle, posing safety hazards such as overheating and short circuits.

[0004] In recent years, structural designs that separate conductive and heating functions have gradually developed. Printing and coating methods have been applied to the preparation of electrothermal fabrics. For example, patent CN115305615B uses woven electrodes combined with printed heating ink. Patents CN110933789B, CN110996409B, patent application CN108696954A, and patent CN221757654U construct interdigitated electrodes and heating coatings through printing, attempting to achieve uniform heating through optimized electrode layout. However, the interfacial bonding stability between the printed electrodes and heating coating is insufficient, easily leading to delamination and cracking, resulting in high interfacial contact resistance and affecting energy conversion efficiency and heating stability. Simultaneously, to ensure the insulation and durability of the electrodes and coating, multi-layer encapsulation is required on the fabric surface. However, multi-layer encapsulation significantly reduces the original flexibility and breathability of the fabric, destroying the core characteristics of electrothermal fabrics as flexible functional materials, making it difficult to meet the comfort requirements of fabrics in practical applications.

[0005] The yarn introduction method integrates conductive and heating yarns into the fabric through textile processes. Patents such as CN210869954U, CN118374936A, CN117364326A, CN118957855A, CN114286460B, CN119967705A, and EP2736304B1 all employ a two-dimensional single-sided structure, placing the conductive electrode yarn and the resistance heating yarn in different areas of the fabric's single side. However, the spatial limitations of the two-dimensional single-sided structure result in a very limited capacity for arranging resistance heating yarn per unit area. To achieve an overall heating effect, the current density needs to be increased, which can lead to problems such as localized overheating. Furthermore, typical two-dimensional single-sided structures often use series or simple parallel circuits, making the current susceptible to variations in contact resistance and yarn resistance, easily resulting in uneven current distribution. Consequently, both safety performance and heating uniformity fail to meet practical application standards.

[0006] Patent CN120649222B employs a volumetric distribution of conductive electrodes and resistive heating areas to construct a three-dimensional heating system. Compared to two-dimensional heating structures, it significantly increases the number and total volume of resistive heating yarns per unit area, effectively reducing local current density and improving heating uniformity and safety. However, the weft knitting process used in this technology has low production efficiency and limited product size.

[0007] Therefore, it is necessary to provide an integrally formed warp-knitted three-dimensional electric heating fabric that can improve production efficiency while ensuring heating uniformity and safety. Summary of the Invention

[0008] The purpose of this invention is to solve the problems existing in the prior art and provide an integrally formed warp-knitted three-dimensional electrothermal fabric.

[0009] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0010] An integrally formed warp-knitted three-dimensional electrothermal fabric includes a matrix, a comb-shaped first electrode layer, and a comb-shaped second electrode layer;

[0011] The substrate is a warp-knitted spacer fabric, comprising a first insulating knitted layer, a second insulating knitted layer, and a spacer layer located between the two;

[0012] The spacer layer contains k heating zones and j non-heating zones arranged alternately along the transverse direction (C), where k≥1 and j≥1;

[0013] The comb-shaped first electrode layer is embedded within the first insulating knitted fabric layer;

[0014] The comb-shaped second electrode layer is embedded within the second insulating knitted fabric layer;

[0015] The comb-shaped first electrode layer includes a first main body extending along the longitudinal direction (W) of the fabric and n first finger-shaped branches extending along the transverse direction of the fabric, where n>1;

[0016] The comb-shaped second electrode layer includes a second main body extending along the longitudinal direction of the fabric and m second finger-like branches extending along the transverse direction of the fabric, where m>1;

[0017] The first and second finger-like branches are arranged alternately in a projection perpendicular to the fabric plane.

[0018] This invention utilizes warp knitting technology to integrate conductive electrode yarns, resistance heating yarns, and insulating looped yarns into a single three-dimensional fabric structure. The comb-shaped conductive electrode consists of a main body and multiple finger-like branches, arranged along the warp direction of the fabric. Each finger-like branch includes a conductive yarn segment extending along the transverse direction of the fabric, collectively forming a distributed power supply network. The resistance heating yarn extends along the warp direction of the fabric and forms cross-electrical contact with the conductive yarn segments, enabling distributed energy transmission from the comb-shaped conductive electrode to each resistance heating yarn. The looped yarns of the first and second insulating knitted layers synchronously knit and fix the conductive electrode yarn and the resistance heating yarn, achieving both reliable electrical connection and mechanical locking, thus constructing a stable integrated electric heating structure. Under the action of the power supply network, each resistance heating yarn heats up synchronously within the fabric's spatial structure, with heat diffusing along the in-plane and thickness directions of the fabric, forming a uniform three-dimensional thermal field.

[0019] As a preferred technical solution:

[0020] As described above, in a one-piece warp-knitted three-dimensional electrothermal fabric, the first main body and the second main body do not overlap in the projection perpendicular to the fabric plane.

[0021] As described above, in a one-piece warp-knitted three-dimensional electric heating fabric, the heating zone is located in the intersecting area of ​​the projection of the first finger branch and the second finger branch perpendicular to the fabric plane.

[0022] As described above, in a one-piece warp-knitted three-dimensional electrothermal fabric, the first main bobbin and the second main bobbin are both located in the same edge region of the fabric; or, the first main bobbin and the second main bobbin are respectively located in the two edge regions of the fabric; or, the first main bobbin and the second main bobbin are both located in the middle region of the fabric.

[0023] As described above, in a one-piece warp-knitted three-dimensional electric heating fabric, the comb-shaped first electrode layer is woven from conductive electrode yarn S1 and conductive electrode yarn M1; both conductive electrode yarn S1 and conductive electrode yarn M1 extend along the longitudinal direction of the fabric, and the conductive electrode yarn S1 is arranged in a serpentine pattern of reciprocating folds and is divided into two parts along the transverse direction of the fabric, one part is in contact with all the conductive electrode yarns M1 to form the first main body, and the other part forms n first finger-like branches;

[0024] The comb-shaped second electrode layer is woven from conductive electrode yarn S2 and conductive electrode yarn M2. Both conductive electrode yarn S2 and conductive electrode yarn M2 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 is arranged in a serpentine pattern with back-and-forth folds and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 to form the second main body, and the other part forms m second finger-like branches.

[0025] As described above, in a one-piece warp-knitted three-dimensional electrothermal fabric, conductive electrode yarn S1 is embedded in the first insulating knitted layer in a weft-insertion manner; conductive electrode yarn S2 is embedded in the second insulating knitted layer in a weft-insertion manner; conductive electrode yarn M1 is embedded in the first insulating knitted layer in one or more of the following methods: warp-insertion, weft-insertion, and loop-forming; and conductive electrode yarn M2 is embedded in the second insulating knitted layer in one or more of the following methods: warp-insertion, weft-insertion, and loop-forming.

[0026] As described above, the width (i.e., the length along the transverse direction) of the first main body or the second main body is 10~30mm, and the width (i.e., the length along the longitudinal direction) of the first finger branch or the second finger branch is 2~35mm; in the projection perpendicular to the fabric plane, the distance between adjacent first finger branches and second finger branches is 2~30mm.

[0027] As described above, in a one-piece warp-knitted three-dimensional electric heating fabric, the non-heating area of ​​the spacer layer is composed of insulating yarn, which is one or more of the following: cotton, wool, silk, linen, polyester, nylon, acrylic, chlorofiber, acrylic chlorofiber, polypropylene, vinylon, spandex, glass fiber, aramid, polyimide fiber, acrylic pre-oxidized yarn, viscose, Tencel, Lyocell, Modal, and cellulose acetate.

[0028] As described above, in a one-piece warp-knitted three-dimensional electric heating fabric, the heating area of ​​the spacer layer is composed of resistance heating yarn, which is one or more of the following: metal conductive yarn, carbon-based conductive yarn, conductive polymer yarn, and yarn coated with conductive material, with a linear resistance of 1000~1000000Ω / cm.

[0029] As described above, in a one-piece warp-knitted three-dimensional electric heating fabric, the conductive electrode yarns S1, M1, S2, and M2 are each independently selected from one or more of the following: metal conductive yarn, carbon-based conductive yarn, conductive polymer yarn, and yarn coated with conductive material, and the linear resistance is 0.01~10Ω / cm.

[0030] As described above, in a one-piece warp-knitted three-dimensional electric heating fabric, the heating zone of the spacer layer is woven in one or more of the following ways: chain knitting, plain warp knitting, pile warp knitting, twill warp knitting, satin warp knitting, and modified weave; the non-heating zone of the spacer layer is woven in one or more of the following ways: chain knitting, plain warp knitting, pile warp knitting, twill warp knitting, satin warp knitting, and modified weave.

[0031] The integrally formed warp-knitted three-dimensional electric heating fabric described above has a thickness of 2.5~40mm.

[0032] Beneficial effects:

[0033] (1) The present invention adopts warp knitting integrated weaving, and the insulating yarn, electrode yarn and resistance heating yarn are woven at the same time, so that the electrode layer and the resistance heating yarn form a stable and reliable contact, reduce the interface contact resistance, and improve the heating stability.

[0034] (2) The heating area of ​​the present invention is the spacer layer of the spacer fabric. The three-dimensional thermal field is formed by relying on the three-dimensional structure of the spacer layer, so that the heat distribution is more uniform and the heating uniformity is improved.

[0035] (3) The present invention places the positive and negative electrodes in different insulating knitted fabric layers, so that the human body cannot simultaneously contact the two conductive areas during normal use, forming structural protection, reducing the risk of short circuit and electric shock, and improving electrical safety.

[0036] (4) The present invention achieves one-time synchronous weaving of structural forming and functional integration based on industrial warp knitting equipment, without the need for subsequent insulation and encapsulation processes. The manufacturing process is simple, with high production efficiency and structural consistency, and is suitable for continuous and large-scale industrial production. Attached Figure Description

[0037] Figures 1-8 This is a schematic diagram of the structure of the one-piece warp-knitted three-dimensional electrothermal fabric of Example 1. Figure 1 This is an assembly diagram; Figure 2 This is a schematic diagram of the explosive decomposition of a layered structure. Figure 3 This is a schematic diagram of the electrode layer; Figure 4 This is a schematic diagram of the projected structure perpendicular to the fabric plane. The insulating knitted layer is hidden, and the non-heating area of ​​the spacer layer is made transparent. Figure 5 This is a schematic diagram of the explosive decomposition of the entire component structure, in which the extension lines of the insulating knitted fabric layer are hidden; Figure 6This is a schematic diagram of the longitudinal cross-sectional structure; Figure 7 This is a schematic diagram of the cross-sectional structure in the transverse direction; Figure 8 This is a schematic diagram of a partial braided coil structure;

[0038] Figures 9-16 This is a schematic diagram of the structure of the one-piece warp-knitted three-dimensional electrothermal fabric in Example 4. Figure 9 This is an assembly diagram; Figure 10 This is a schematic diagram of the explosive decomposition of a layered structure. Figure 11 This is a schematic diagram of the electrode layer; Figure 12 This is a schematic diagram of the projected structure perpendicular to the fabric plane. The insulating knitted layer is hidden, and the non-heating area of ​​the spacer layer is made transparent. Figure 13 This is a schematic diagram of the explosive decomposition of the entire component structure, in which the extension lines of the insulating knitted fabric layer are hidden; Figure 14 This is a schematic diagram of the longitudinal cross-sectional structure; Figure 15 This is a schematic diagram of the cross-sectional structure in the transverse direction; Figure 16 This is a schematic diagram of a partial braided coil structure;

[0039] Figures 17-19 This is a schematic diagram of the structure of the one-piece warp-knitted three-dimensional electrothermal fabric in Example 5. Figure 17 This is a schematic diagram of the explosive decomposition of a layered structure. Figure 18 This is a schematic diagram of the electrode layer; Figure 19 This is a schematic diagram of the projected structure perpendicular to the fabric plane. The insulating knitted layer is hidden, and the non-heating area of ​​the spacer layer is made transparent.

[0040] Figures 1-19 In the diagram, C represents the transverse direction of the fabric, W represents the longitudinal direction of the fabric, 110 is the first insulating knitted layer, 120 is the second insulating knitted layer, 130 is the comb-shaped first electrode layer, 131 is the first main body, 132 is the first finger-shaped branch, 133 is the conductive electrode yarn S1, 134 is the conductive electrode yarn M1, 140 is the comb-shaped second electrode layer, 141 is the second main body, 142 is the second finger-shaped branch, 143 is the conductive electrode yarn S2, 144 is the conductive electrode yarn M2, 150 is the spacer layer, 151 is the first non-heating area, 152 is the second non-heating area, 153 is the first heating area, and 154 is the second heating area. Detailed Implementation

[0041] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0042] The following are the test methods for the relevant performance indicators in each embodiment:

[0043] Stable resistance value, average heating temperature, and standard deviation of heating temperature: Under environmental conditions of 20±2℃ and 65%±2% relative humidity, the sample was allowed to relax for 24 hours. Then, a 10V DC voltage was applied to the sample and continuously powered on. The stable resistance value of the sample within 60 minutes of power-on was measured using a digital multimeter. After the sample reached thermal equilibrium after 60 minutes of power-on, the surface temperature of the sample was collected using an infrared thermal imager. Five test points were selected on the fabric surface, and the average value and standard deviation of the temperature at the test points were calculated, i.e., the average heating temperature and the standard deviation of the heating temperature.

[0044] Example 1

[0045] A one-piece warp-knitted three-dimensional electric heating fabric, such as Figures 1-8 As shown, it consists of a substrate, a comb-shaped first electrode layer 130, and a comb-shaped second electrode layer 140;

[0046] The substrate is a warp-knitted spacer fabric, which consists of a first insulating knitted layer 110, a second insulating knitted layer 120, and a spacer layer 150 located between the two.

[0047] The spacer layer 150 consists of one heating zone and two non-heating zones. The heating zone is referred to as the first heating zone 153, and the two non-heating zones are referred to as the first non-heating zone 151 and the second non-heating zone 152, respectively. They are arranged in the horizontal direction as the first non-heating zone 151, the first heating zone 153 and the second non-heating zone 152.

[0048] The comb-shaped first electrode layer 130 is woven from conductive electrode yarn S1 133 (9×0.03mm copper stranded wire, with a line resistance of 0.04Ω / cm) and conductive electrode yarn M1 134 (9×0.03mm copper stranded wire, with a line resistance of 0.04Ω / cm). Both conductive electrode yarn S1 133 and conductive electrode yarn M1 134 extend along the longitudinal direction of the fabric. The conductive electrode yarn S1 133 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M1 134 to form the first main body 131, and the other part forms 10 first finger-like branches 132.

[0049] Conductive electrode yarn S1 133 is embedded in the first insulating knitted layer 110 in a weft-insertion manner, and conductive electrode yarn M1 134 is embedded in the first insulating knitted layer 110 in a warp-insertion manner.

[0050] The comb-shaped second electrode layer 140 is woven from conductive electrode yarn S2 143 (9×0.03mm copper stranded wire, with a line resistance of 0.04Ω / cm) and conductive electrode yarn M2 144 (9×0.03mm copper stranded wire, with a line resistance of 0.04Ω / cm). Both conductive electrode yarn S2 143 and conductive electrode yarn M2 144 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 143 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 144 to form the second main body 141, and the other part forms 10 second finger-like branches 142.

[0051] The conductive electrode yarn S2 143 is embedded in the second insulating knitted layer 120 in a weft-insertion manner, and the conductive electrode yarn M2 144 is embedded in the second insulating knitted layer 120 in a warp-insertion manner.

[0052] The first main body 131 and the second main body 141 do not overlap in the projection perpendicular to the fabric plane;

[0053] The first main bob 131 and the second main bob 141 are respectively located on the two edge areas of the fabric;

[0054] The width of the first main stem 131 is 20mm, the width of the second main stem 141 is 20mm, and the width of the first finger branch 132 is 9mm.

[0055] The first finger-shaped branch 132 and the second finger-shaped branch 142 are arranged in an alternating pattern in a projection perpendicular to the fabric plane, and the first heating zone 153 is located within the alternating zone.

[0056] In the projection perpendicular to the fabric plane, the first finger branch 132 and the second finger branch 142 point in opposite directions, the distance between adjacent first finger branches 132 and second finger branches 142 is 20mm, and the first finger branches 132 and the second finger branches 142 extend beyond the heating area 153 of the spacer layer 150 along their own extension direction.

[0057] The first main stem 131 and a second finger branch 142 are electrically connected to the positive and negative terminals of a power interface, respectively. The width of the second finger branch 142 connected to the power interface is greater than that of other second finger branches 142 on the same layer. The width of the second finger branch 142 connected to the power interface is 30mm, and the width of the second finger branch 142 not connected to the power interface is 9mm.

[0058] The first insulating knitted layer 110 and the second insulating knitted layer 120 are both made of insulating yarn (polyacrylonitrile yarn, specification 40S);

[0059] The first non-heating zone 151 and the second non-heating zone 152 are both made of insulating yarn (polyacrylonitrile yarn, specification 40S);

[0060] The first heating zone 153 is composed of resistance heating yarn (polyester fiber coated with carbon nanotube conductive paste, specification 70D, line resistance 2000Ω / cm);

[0061] The first non-heating zone 151, the second non-heating zone 152, and the first heating zone 153 are all woven using the warp flat weave method.

[0062] The preparation method of the one-piece warp-knitted three-dimensional electric heating fabric described above is as follows: the fabric is knitted using a double needle bed warp knitting machine with two large horizontal pattern combs and six ground combs. The machine size is E28. The order of the combs from front to back of the machine is as follows: PB1 (large horizontal pattern comb), GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), GB4 (ground comb), GB5 (ground comb), GB6 (ground comb), PB2 (large horizontal pattern comb).

[0063] PB1: Thread one conductive electrode yarn S1 as a weft insert;

[0064] GB1: Fully threaded insulating yarn, with yarn padding number 1-0-1-1 / 1-2-1-1 / / , to form warp loops and weave the first insulating knitted layer;

[0065] GB2: The left side is fully threaded with 30 conductive electrode yarns M1 as the lining warp;

[0066] GB3: 60 insulating yarns are fully threaded on both sides, with the yarn padding number 1-0-1-2 / 1-0-1-2 / / , and the non-heating area of ​​the braided spacer layer;

[0067] GB4: Except for the 60 needles on the left and right, the rest are fully threaded with resistance heating yarn, with the padding yarn number 1-0-1-2 / 1-0-1-2 / / , and the heating area of ​​the interlayer is woven.

[0068] GB5: The right side is fully threaded with 30 conductive electrode yarns M2 as the lining warp;

[0069] GB6: Fully threaded insulating yarn, with padding yarn number 1-1-1-0 / 1-1-1-2 / / , make warp flat loops, and weave the second insulating knitted layer;

[0070] PB2: Thread one conductive electrode yarn S2 as a weft insert.

[0071] The final one-piece warp-knitted three-dimensional electric heating fabric has a thickness of 10 mm, a stable resistance value of 33 Ω, an average heating temperature of 45.2 ℃, and a standard deviation of 4.2 ℃.

[0072] Example 2

[0073] An integrally formed warp-knitted three-dimensional electrothermal fabric, comprising a matrix, a comb-shaped first electrode layer, and a comb-shaped second electrode layer;

[0074] The base is a warp-knitted spacer fabric, which consists of a first insulating knitted layer, a second insulating knitted layer, and a spacer layer located between the two.

[0075] The spacer layer consists of two heating zones (referred to as the first heating zone and the second heating zone, respectively) and three non-heating zones (referred to as the first non-heating zone, the second non-heating zone, and the third non-heating zone, respectively), arranged sequentially along the horizontal direction as the first non-heating zone, the first heating zone, the second non-heating zone, the second heating zone, and the third non-heating zone;

[0076] The comb-shaped first electrode layer is woven from conductive electrode yarn S1 (9×0.05mm copper stranded wire, with a line resistance of 0.01Ω / cm) and conductive electrode yarn M1 (silver-plated nylon, with a linear density of 70D and a line resistance of 10Ω / cm). Both conductive electrode yarn S1 and conductive electrode yarn M1 extend along the longitudinal direction of the fabric. The conductive electrode yarn S1 is arranged in a serpentine pattern with back-and-forth folds and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M1 to form the first main body, and the other part forms 7 first finger-like branches.

[0077] The conductive electrode yarn S1 is embedded in the first insulating knitted layer in a weft-insertion manner, and the conductive electrode yarn M1 is embedded in the first insulating knitted layer in a weft-insertion manner.

[0078] The comb-shaped second electrode layer is woven from conductive electrode yarn S2 (9×0.05mm copper stranded wire, with a line resistance of 0.01Ω / cm) and conductive electrode yarn M2 (silver-plated nylon, with a linear density of 70D and a line resistance of 10Ω / cm). Both conductive electrode yarn S2 and conductive electrode yarn M2 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 is arranged in a serpentine pattern with back-and-forth folds and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 to form the second main body, and the other part forms 7 second finger-like branches.

[0079] The conductive electrode yarn S2 is embedded in the second insulating knitted layer in a weft-insertion manner, and the conductive electrode yarn M2 is embedded in the second insulating knitted layer in a weft-insertion manner;

[0080] The first main stem and the second main stem do not overlap in their projections perpendicular to the fabric plane;

[0081] The first and second main bobs are respectively located on the two edge areas of the fabric;

[0082] The width of the first main stem is 30mm, the width of the second main stem is 30mm, and the width of the first finger-like branch is 10mm.

[0083] The first and second finger branches are arranged alternately in a projection perpendicular to the fabric plane, and the first heating area, the second heating area, and the second non-heating area are located in the alternating area.

[0084] In the projection perpendicular to the fabric plane, the first finger-shaped branch and the second finger-shaped branch point in opposite directions, the distance between adjacent first finger-shaped branches and second finger-shaped branches is 30mm, and the first finger-shaped branch and the second finger-shaped branch extend beyond the heating area of ​​the spacer layer along their own extension direction.

[0085] The first main branch and a second finger-shaped branch are electrically connected to the positive and negative terminals of a power interface, respectively. The width of the second finger-shaped branch connected to the power interface is greater than that of other second finger-shaped branches on the same layer. The width of the second finger-shaped branch connected to the power interface is 35mm, and the width of the second finger-shaped branch not connected to the power interface is 10mm.

[0086] Both the first and second insulating knitted layers are made of insulating yarn (flame-retardant nylon filament, specification 100D / 48F);

[0087] The first non-heating zone, the second non-heating zone, and the third non-heating zone are all made of insulating yarn (flame-retardant nylon filament, specification 100D / 48F);

[0088] Both the first and second heating zones are made of resistance heating yarn (low-temperature carbonized pre-oxidized yarn with a linear resistance of 3000Ω / cm);

[0089] The weaving method for the first non-heating zone, the first heating zone, the second non-heating zone, the second heating zone, and the third non-heating zone is chain braiding.

[0090] The preparation method of the one-piece warp-knitted three-dimensional electric heating fabric described above is as follows: the fabric is knitted using a double needle bed warp knitting machine with two large horizontal pattern combs and six ground combs. The machine size is E24. The order of the combs from front to back of the machine is as follows: PB1 (large horizontal pattern comb), GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), GB4 (ground comb), GB5 (ground comb), GB6 (ground comb), PB2 (large horizontal pattern comb).

[0091] PB1: Thread two conductive electrode yarns S1 to form the weft;

[0092] GB1: Fully threaded insulating yarn, with yarn padding number 1-0-1-1 / 1-2-1-1 / / , to form warp loops and weave the first insulating knitted layer;

[0093] GB2: 45 conductive electrode yarns M1 are fully threaded on the left side, with the number of padding yarns being 0-0-1-1 / 1-1-0-0 / / , and 1 stitch is made for weft insertion.

[0094] GB3: 80 insulating yarns are fully threaded on each side and 20 insulating yarns are fully threaded in the middle. The padding yarn is numbered 1-0-1-0 / / . The non-heating area of ​​the braided spacer layer.

[0095] GB4: Except for the 80 stitches on the left and right and the 20 stitches in the middle, the rest are fully threaded with resistance heating yarn, with the padding yarn number 1-0-1-0 / / , and the heating area of ​​the interlayer is woven.

[0096] GB5: The right side is fully threaded with 45 conductive electrode yarns M2, with the padding yarn number 0-0-0-0 / 1-1-1-1 / / , and 1 stitch is used for weft insertion.

[0097] GB6: Fully threaded insulating yarn, with padding yarn number 1-1-1-0 / 1-1-1-2 / / , make warp flat loops, and weave the second insulating knitted layer;

[0098] PB2: Thread two conductive electrode yarns S2 to form the weft.

[0099] The final one-piece warp-knitted three-dimensional electric heating fabric has a thickness of 25 mm, a stable resistance value of 42 Ω, an average heating temperature of 38.4 ℃, and a standard deviation of 3.8 ℃.

[0100] Example 3

[0101] An integrally formed warp-knitted three-dimensional electrothermal fabric, comprising a matrix, a comb-shaped first electrode layer, and a comb-shaped second electrode layer;

[0102] The base is a warp-knitted spacer fabric, which consists of a first insulating knitted layer, a second insulating knitted layer, and a spacer layer located between the two.

[0103] The spacer layer consists of one heating zone (referred to as the first heating zone) and two non-heating zones (referred to as the first non-heating zone and the second non-heating zone, respectively), arranged sequentially along the horizontal direction as the first non-heating zone, the first heating zone, and the second non-heating zone;

[0104] The comb-shaped first electrode layer is woven from conductive electrode yarn S1 (12×0.03mm copper stranded wire with a line resistance of 0.025Ω / cm) and conductive electrode yarn M1 (12×0.03mm copper stranded wire with a line resistance of 0.025Ω / cm). Both conductive electrode yarn S1 and conductive electrode yarn M1 extend along the longitudinal direction of the fabric. The conductive electrode yarn S1 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M1 to form the first main body, and the other part forms 32 first finger-like branches.

[0105] The conductive electrode yarn S1 is embedded in the first insulating knitted fabric layer in a weft-insertion manner, and the conductive electrode yarn M1 is embedded in the first insulating knitted fabric layer in a warp-knitted loop manner;

[0106] The comb-shaped second electrode layer is woven from conductive electrode yarn S2 (12×0.03mm copper stranded wire, with a line resistance of 0.025Ω / cm) and conductive electrode yarn M2 (12×0.03mm copper stranded wire, with a line resistance of 0.025Ω / cm). Both conductive electrode yarn S2 and conductive electrode yarn M2 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 to form the second main body, and the other part forms 32 second finger-like branches.

[0107] The conductive electrode yarn S2 is embedded in the second insulating knitted fabric layer in a weft-insertion manner, and the conductive electrode yarn M2 is embedded in the second insulating knitted fabric layer in a warp-knitted loop manner;

[0108] The first main stem and the second main stem do not overlap in their projections perpendicular to the fabric plane;

[0109] The first and second main bobs are respectively located on the two edge areas of the fabric;

[0110] The width of the first main stem is 10mm, the width of the second main stem is 10mm, and the width of the first finger-like branch is 2mm.

[0111] The first and second finger-shaped branches are arranged alternately in a projection perpendicular to the fabric plane, and the first heating zone is located within the alternate area.

[0112] In the projection perpendicular to the fabric plane, the first finger-shaped branch and the second finger-shaped branch point in opposite directions, the distance between adjacent first finger-shaped branches and second finger-shaped branches is 2mm, and the first finger-shaped branch and the second finger-shaped branch extend beyond the heating area of ​​the spacer layer along their own extension direction.

[0113] The first main branch and a second finger-shaped branch are electrically connected to the positive and negative terminals of a power interface, respectively. The width of the second finger-shaped branch connected to the power interface is greater than that of other second finger-shaped branches on the same layer. The width of the second finger-shaped branch connected to the power interface is 15mm, and the width of the second finger-shaped branch not connected to the power interface is 2mm.

[0114] Both the first and second insulating knitted layers are made of insulating yarn (polyacrylonitrile yarn, specification 40S);

[0115] Both the first and second non-heating zones are made of insulating yarn (polyacrylonitrile yarn, specification 40S);

[0116] The first heating zone is composed of resistance heating yarn (polyester core conductive elastic yarn, manufactured by Haining Taixin New Material Co., Ltd., linear density 100D, linear resistance 1,000,000 Ω / cm);

[0117] The weaving method for the first non-heating zone, the second non-heating zone, and the first heating zone is all warp oblique.

[0118] The preparation method of the one-piece warp-knitted three-dimensional electric heating fabric described above is as follows: the fabric is knitted using a double needle bed warp knitting machine with two large horizontal pattern combs and six ground combs. The machine size is E24. The order of the combs from front to back of the machine is as follows: PB1 (large horizontal pattern comb), GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), GB4 (ground comb), GB5 (ground comb), GB6 (ground comb), PB2 (large horizontal pattern comb).

[0119] PB1: Thread one conductive electrode yarn S1 as a weft insert;

[0120] GB1: Fully threaded insulating yarn, with yarn padding number 1-0-1-1 / 1-0-1-1 / / , to form a chain loop; GB2: 0-0-2-2 / 2-2-0-0 / / , fully threaded insulating yarn, to form a weft insert; to weave the first insulating knitted fabric layer;

[0121] GB3: 20 conductive electrode yarns M1 are fully threaded on the left side, with the padding yarn number 1-0-1-1 / 1-2-1-1 / / , and the warp is made into a loop;

[0122] GB4: 40 insulating yarns are fully threaded on the left and right sides, and resistance heating yarns are fully threaded in the remaining areas. The padding yarn is numbered 1-0-3-4 / / . The non-heating area and the heating area of ​​the braided spacer layer are separated.

[0123] GB5: The right side is fully threaded with 20 conductive electrode yarns M2, with the padding yarn number 1-1-1-0 / 1-1-1-2 / / , and the warp is made into a loop;

[0124] GB6: Fully threaded insulating yarn, with padding yarn number 1-1-1-0 / 3-3-3-4 / / , forming a warp skew loop, and weaving a second insulating knitted layer;

[0125] PB2: Thread one conductive electrode yarn S2 as a weft insert.

[0126] The final one-piece warp-knitted three-dimensional electric heating fabric has a thickness of 40 mm, a stable resistance value of 58 Ω, an average heating temperature of 32.0 ℃, and a standard deviation of 4.5 ℃.

[0127] Example 4

[0128] A one-piece warp-knitted three-dimensional electric heating fabric, such as Figures 9-16 As shown, it consists of a substrate, a comb-shaped first electrode layer 130, and a comb-shaped second electrode layer 140;

[0129] The substrate is a warp-knitted spacer fabric, which consists of a first insulating knitted layer 110, a second insulating knitted layer 120, and a spacer layer 150 located between the two.

[0130] The spacer layer 150 consists of one heating zone and two non-heating zones. The heating zone is referred to as the first heating zone 153, and the two non-heating zones are referred to as the first non-heating zone 151 and the second non-heating zone 152, respectively. They are arranged in the horizontal direction as the first non-heating zone 151, the first heating zone 153 and the second non-heating zone 152.

[0131] The comb-shaped first electrode layer 130 is woven from conductive electrode yarn S1 133 (9×0.05mm copper stranded wire, with a line resistance of 0.01Ω / cm) and conductive electrode yarn M1 134 (9×0.05mm copper stranded wire, with a line resistance of 0.01Ω / cm). Both conductive electrode yarn S1 133 and conductive electrode yarn M1 134 extend along the longitudinal direction of the fabric. The conductive electrode yarn S1 133 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M1 134 to form the first main body 131, and the other part forms 8 first finger-like branches 132.

[0132] Conductive electrode yarn S1 133 is embedded in the first insulating knitted fabric layer 110 in a weft-insertion manner, and conductive electrode yarn M1 134 is embedded in the first insulating knitted fabric layer 110 in a chain-knitted loop manner;

[0133] The comb-shaped second electrode layer 140 is woven from conductive electrode yarn S2 143 (9×0.05mm copper stranded wire, with a line resistance of 0.01Ω / cm) and conductive electrode yarn M2 144 (9×0.05mm copper stranded wire, with a line resistance of 0.01Ω / cm). Both conductive electrode yarn S2 143 and conductive electrode yarn M2 144 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 143 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 144 to form the second main body 141, and the other part forms 8 second finger-like branches 142.

[0134] Conductive electrode yarn S2 143 is embedded in the second insulating knitted layer 120 in a weft-insertion manner, and conductive electrode yarn M2 144 is embedded in the second insulating knitted layer 120 in a chain-knitted loop manner.

[0135] The first main body 131 and the second main body 141 do not overlap in the projection perpendicular to the fabric plane;

[0136] The first main bobbin 131 and the second main bobbin 141 are both located in the same edge area of ​​the fabric;

[0137] The width of the first main branch 131 is 20mm, the width of the second main branch 141 is 20mm, the width of the first finger branch 132 is 15mm, and the width of the second finger branch 142 is 15mm.

[0138] The first finger-shaped branch 132 and the second finger-shaped branch 142 are arranged in an alternating pattern in a projection perpendicular to the fabric plane, and the heating area 153 is located in the alternating area.

[0139] In the projection perpendicular to the fabric plane, the first finger branch 132 and the second finger branch 142 point in the same direction, the distance between adjacent first finger branches 132 and second finger branches 142 is 30mm, and the first finger branches 132 and the second finger branches 142 extend beyond the heating area 153 of the spacer layer 150 along their own extension direction.

[0140] The first main stem 131 and the second main stem 141 are electrically connected to the positive and negative terminals of a power interface, respectively.

[0141] The first insulating knitted layer 110 and the second insulating knitted layer 120 are both made of insulating yarn (wool yarn, specification 60Nm);

[0142] The first non-heating zone 151 and the second non-heating zone 152 are both made of insulating yarn (wool yarn, specification 60Nm);

[0143] The heating zone 153 is made of resistance heating yarn (conductive yarn blended with stainless steel fiber and acrylic fiber, blend ratio 20 / 80, specification 32S, line resistance 1000Ω / cm);

[0144] The first non-heating zone 151 is woven with a warp satin weave, while the second non-heating zone 152 and the heating zone 153 are both woven with a warp flat weave.

[0145] The preparation method of the one-piece warp-knitted three-dimensional electric heating fabric described above is as follows: the fabric is knitted using a double needle bed warp knitting machine with two large horizontal pattern combs and six ground combs. The machine size is E24. The order of the combs from front to back of the machine is as follows: PB1 (large horizontal pattern comb), GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), GB4 (ground comb), GB5 (ground comb), GB6 (ground comb), PB2 (large horizontal pattern comb).

[0146] PB1: Thread one conductive electrode yarn S1 as a weft insert;

[0147] GB1: Fully threaded insulating yarn, with yarn padding number 1-0-3-3 / 3-4-1-1 / / , forming a warp skew loop, and weaving the first insulating knitted layer;

[0148] GB2: 30 conductive electrode yarns M1 are fully threaded on the left side, with the padding yarn number 1-0-1-1 / / , and woven into a loop;

[0149] GB3: The left side is fully threaded with 80 insulating yarns, with the yarn padding number 1-0-1-2 / 2-3-2-1 / / , the first non-heating zone of the braided spacer layer;

[0150] GB4: The right side is fully threaded with 60 insulating yarns, and the rest of the needles except for the 80 needles on the left and the 60 needles on the right are fully threaded with resistance heating yarns, with the padding yarn number 1-0-1-2 / 1-0-1-2 / / , and the second non-heating area and heating area of ​​the braided spacer layer.

[0151] GB5: Starting from the 40th stitch on the left, fully thread 30 conductive electrode yarns M2, padding with yarn number 1-1-1-0 / / , and braid into a loop;

[0152] GB6: Fully threaded insulating yarn, with padding yarn number 1-1-1-0 / 3-3-3-4 / / , forming a warp skew loop, and weaving a second insulating knitted layer;

[0153] PB2: Thread one conductive electrode yarn S2 as a weft insert.

[0154] The final one-piece warp-knitted three-dimensional electric heating fabric has a thickness of 2.5 mm, a stable resistance of 21 Ω, an average heating temperature of 51.2 ℃, and a standard deviation of 3.4 ℃.

[0155] Example 5

[0156] A one-piece warp-knitted three-dimensional electric heating fabric, such as Figures 17-19 As shown, it consists of a substrate, a comb-shaped first electrode layer 130, and a comb-shaped second electrode layer 140;

[0157] The substrate is a warp-knitted spacer fabric, which consists of a first insulating knitted layer 110, a second insulating knitted layer 120, and a spacer layer 150 located between the two.

[0158] The spacer layer 150 consists of two heating zones (referred to as the first heating zone and the second heating zone, respectively) and one non-heating zone (referred to as the first non-heating zone), arranged sequentially along the horizontal direction as the first heating zone 153, the first non-heating zone 151 and the second heating zone 154;

[0159] The comb-shaped first electrode layer 130 is woven from conductive electrode yarn S1 (silver-plated aramid, linear density 400D, linear resistance 1Ω / cm) and conductive electrode yarn M1 (silver-plated aramid, linear density 400D, linear resistance 1Ω / cm); both conductive electrode yarn S1 and conductive electrode yarn M1 extend along the longitudinal direction of the fabric. The conductive electrode yarn S1 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M1 to form the first main body 131, and the other part forms 16 first finger-like branches 132.

[0160] The conductive electrode yarn S1 is embedded in the first insulating knitted fabric layer 110 in a weft-insertion manner, and the conductive electrode yarn M1 is embedded in the first insulating knitted fabric layer 110 in a combination of chain-knitted loops and warp-insertion.

[0161] The comb-shaped second electrode layer 140 is woven from conductive electrode yarn S2 (silver-plated aramid, linear density 400D, linear resistance 1Ω / cm) and conductive electrode yarn M2 (silver-plated aramid, linear density 400D, linear resistance 1Ω / cm); both conductive electrode yarn S2 and conductive electrode yarn M2 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 to form the second main body 141, and the other part forms 16 second finger-like branches 142.

[0162] The conductive electrode yarn S2 is embedded in the second insulating knitted fabric layer 120 in a weft-insertion manner, and the conductive electrode yarn M2 is embedded in the second insulating knitted fabric layer 120 in a chain-knitted loop manner.

[0163] The first main body 131 and the second main body 141 do not overlap in the projection perpendicular to the fabric plane;

[0164] The first main bobbin 131 and the second main bobbin 141 are located in the middle area of ​​the fabric;

[0165] The width of the first main branch 131 is 15mm, the width of the second main branch 141 is 15mm, the width of the first finger branch 132 is 5mm, and the width of the second finger branch 142 is 5mm.

[0166] The first finger-shaped branch 132 and the second finger-shaped branch 142 are arranged alternately in a projection perpendicular to the fabric plane, and the first heating area 153 and the second heating area 154 are located in the alternating area.

[0167] In the projection perpendicular to the fabric plane, the first finger branch 132 and the second finger branch 142 point in the same direction, the distance between adjacent first finger branches 132 and second finger branches 142 is 10mm, and the first finger branches 132 and the second finger branches 142 do not extend beyond the heating area of ​​the spacer layer along their own extension direction.

[0168] The first main stem 131 and the second main stem 141 are electrically connected to the positive and negative terminals of a power interface, respectively.

[0169] The first insulating knitted layer 110 and the second insulating knitted layer 120 are composed of insulating yarn (flame-retardant nylon filament, specification 100D / 48F);

[0170] The first non-heating zone 151 is made of insulating yarn (flame-retardant nylon filament, specification 100D / 48F);

[0171] The first heating zone 153 and the second heating zone 154 are both made of resistance heating yarn (pre-oxidized yarn carbonized at low temperature, with a linear resistance of 5000Ω / cm);

[0172] The first non-heating zone 151, the first heating zone 153, and the second heating zone 154 are all woven with warp satin.

[0173] The preparation method of the one-piece warp-knitted three-dimensional electric heating fabric described above is as follows: the fabric is knitted using a double needle bed warp knitting machine with two large horizontal pattern combs and six ground combs. The machine size is E22. The order of the combs from front to back of the machine is as follows: PB1 (large horizontal pattern comb), GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), GB4 (ground comb), GB5 (ground comb), GB6 (ground comb), PB2 (large horizontal pattern comb).

[0174] PB1: Thread one conductive electrode yarn S1 as a weft insert;

[0175] GB1: Fully threaded insulating yarn, with yarn padding number 1-0-2-2 / 2-3-1-1 / / , forming warp loops, and weaving the first insulating knitted layer;

[0176] GB2: Starting from the 10th stitch on the left side of the middle of the fabric, 20 conductive electrode yarns M1 are fully threaded to the left. First, 20 horizontal rows are braided into loops, with the padding yarn number 1-0-1-1 / / , and then the warp is made.

[0177] GB3: Starting from the middle of the fabric, 50 insulating yarns are fully threaded on both the left and right sides, with the yarn padding number 1-0-1-2 / 2-3-2-1 / / , and the non-heating area of ​​the braided interlayer;

[0178] GB4: Except for the 50 stitches on the left and right sides of the middle of the fabric, the padding yarn is numbered 1-0-1-2 / 2-3-2-1 / / , and the rest is fully threaded with resistance heating yarn to weave the heating area of ​​the interlayer.

[0179] GB5: Starting from the 10th stitch on the right in the middle of the fabric, 20 conductive electrode yarns M2 are fully threaded to the right, with the padding yarn number 1-1-1-0 / / , and woven into a loop.

[0180] GB6: Fully threaded insulating yarn, with padding yarn number 1-1-1-0 / 3-3-3-4 / / , forming a warp skew loop, and weaving a second insulating knitted layer;

[0181] PB2: Thread one conductive electrode yarn S2 as a weft insert.

[0182] The final one-piece warp-knitted three-dimensional electric heating fabric has a thickness of 33 mm, a stable resistance value of 48 Ω, an average heating temperature of 36.3 ℃, and a standard deviation of 3.9 ℃.

[0183] Example 6

[0184] An integrally formed warp-knitted three-dimensional electrothermal fabric, comprising a matrix, a comb-shaped first electrode layer, and a comb-shaped second electrode layer;

[0185] The base is a warp-knitted spacer fabric, which consists of a first insulating knitted layer, a second insulating knitted layer, and a spacer layer located between the two.

[0186] The spacer layer consists of one heating zone (referred to as the first heating zone) and one non-heating zone (referred to as the first non-heating zone), arranged sequentially along the horizontal direction as the first non-heating zone and the first heating zone;

[0187] The comb-shaped first electrode layer is woven from conductive electrode yarn S1 (12×0.03mm copper stranded wire with a line resistance of 0.025Ω / cm) and conductive electrode yarn M1 (12×0.03mm copper stranded wire with a line resistance of 0.025Ω / cm). Both conductive electrode yarn S1 and conductive electrode yarn M1 extend along the longitudinal direction of the fabric. The conductive electrode yarn S1 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M1 to form the first main body, and the other part forms 9 first finger-like branches.

[0188] The conductive electrode yarn S1 is embedded in the first insulating knitted layer in a weft-insertion manner, and the conductive electrode yarn M1 is embedded in the first insulating knitted layer in a warp-insertion manner;

[0189] The comb-shaped second electrode layer is woven from conductive electrode yarn S2 (12×0.03mm copper stranded wire, with a line resistance of 0.025Ω / cm) and conductive electrode yarn M2 (12×0.03mm copper stranded wire, with a line resistance of 0.025Ω / cm). Both conductive electrode yarn S2 and conductive electrode yarn M2 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 to form the second main body, and the other part forms 9 second finger-like branches.

[0190] The conductive electrode yarn S2 is embedded in the second insulating knitted layer in a weft-insertion manner, and the conductive electrode yarn M2 is embedded in the second insulating knitted layer in a warp-insertion manner;

[0191] The first main stem and the second main stem do not overlap in their projections perpendicular to the fabric plane;

[0192] The first and second main bobs are both located in the same edge area of ​​the fabric;

[0193] The width of the first main stem is 24mm, the width of the second main stem is 24mm, the width of the first finger-like branch is 12mm, and the width of the second finger-like branch is 12mm.

[0194] The first and second finger-shaped branches are arranged alternately in a projection perpendicular to the fabric plane, and the first heating zone is located within the alternate area.

[0195] In the projection perpendicular to the fabric plane, the first finger-shaped branch and the second finger-shaped branch point in the same direction, the distance between adjacent first finger-shaped branches and second finger-shaped branches is 25mm, and the first finger-shaped branch and the second finger-shaped branch do not extend beyond the heating area of ​​the spacer layer along their own extension direction.

[0196] The first and second main branches are electrically connected to the positive and negative terminals of a power interface, respectively.

[0197] The first and second insulating knitted layers are made of insulating yarn (polyacrylonitrile yarn, specification 40S);

[0198] The first non-heating zone is made of insulating yarn (polyacrylonitrile yarn, specification 40S); the loop weaving method of the first non-heating zone is warp flat.

[0199] The first heating zone is made of resistance heating yarn (polyester fiber coated with carbon nanotube conductive paste, specification is 70D, line resistance is 2000Ω / cm); the first heating zone is woven by warp pile.

[0200] The preparation method of the one-piece warp-knitted three-dimensional electric heating fabric described above is as follows: the fabric is knitted using a double needle bed warp knitting machine with two large horizontal pattern combs and six ground combs. The machine size is E28. The order of the combs from front to back of the machine is as follows: PB1 (large horizontal pattern comb), GB1 (ground comb), GB2 (ground comb), GB3 (ground comb), GB4 (ground comb), GB5 (ground comb), GB6 (ground comb), PB2 (large horizontal pattern comb).

[0201] PB1: Thread one conductive electrode yarn S1 as a weft insert;

[0202] GB1: Fully threaded insulating yarn, with yarn padding number 1-0-1-1 / 1-2-1-1 / / , to form warp loops and weave the first insulating knitted layer;

[0203] GB2: The left side is fully threaded with 42 conductive electrode yarns M1 as the lining warp;

[0204] GB3: 120 insulating yarns are fully threaded on the left, with the yarn padding number 1-0-1-2 / 1-0-1-2 / / , and the non-heating area of ​​the braided spacer layer;

[0205] GB4: Except for the left 120 needles, the padding yarn is numbered 1-0-2-3 / / , and the rest is fully threaded with resistance heating yarn to weave the heating area of ​​the interlayer;

[0206] GB5: Starting from the 62nd stitch on the left, fully thread 42 conductive electrode yarns M2 to make the lining warp;

[0207] GB6: Fully threaded insulating yarn, with padding yarn number 1-1-1-0 / 1-1-1-2 / / , make warp flat loops, and weave the second insulating knitted layer;

[0208] PB2: Thread one conductive electrode yarn S2 as a weft insert.

[0209] The final one-piece warp-knitted three-dimensional electric heating fabric has a thickness of 21 mm, a stable resistance of 34 Ω, an average heating temperature of 42.6 ℃, and a standard deviation of 4.6 ℃.

Claims

1. A one-piece molded warp-knitted three-dimensional electric heating fabric, characterized in that, It includes a substrate, a comb-shaped first electrode layer, and a comb-shaped second electrode layer; The substrate is a warp-knitted spacer fabric, comprising a first insulating knitted layer, a second insulating knitted layer, and a spacer layer located between the two; The spacer layer consists of k heating zones and j non-heating zones arranged alternately along the horizontal direction, where k ≥ 1 and j ≥ 1; The comb-shaped first electrode layer is embedded within the first insulating knitted fabric layer; The comb-shaped second electrode layer is embedded within the second insulating knitted fabric layer; The comb-shaped first electrode layer includes a first main body extending along the longitudinal direction of the fabric and n first finger-shaped branches extending along the transverse direction of the fabric, where n>1; The comb-shaped second electrode layer includes a second main body extending along the longitudinal direction of the fabric and m second finger-like branches extending along the transverse direction of the fabric, where m>1; The first and second finger-like branches are arranged alternately in a projection perpendicular to the fabric plane.

2. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The first and second main stems do not overlap in their projections perpendicular to the fabric plane.

3. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The heating zone is located in the area where the first and second finger-shaped branches intersect in the projection perpendicular to the fabric plane.

4. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The first and second main bobs are both located in the same edge area of ​​the fabric; or the first and second main bobs are located in the two edge areas of the fabric respectively; or the first and second main bobs are both located in the middle area of ​​the fabric.

5. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The comb-shaped first electrode layer is woven from conductive electrode yarn S1 and conductive electrode yarn M1. Both conductive electrode yarn S1 and conductive electrode yarn M1 extend along the longitudinal direction of the fabric. The conductive electrode yarn S1 is arranged in a serpentine pattern with back and forth and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M1 to form the first main body, and the other part forms n first finger-shaped branches. The comb-shaped second electrode layer is woven from conductive electrode yarn S2 and conductive electrode yarn M2. Both conductive electrode yarn S2 and conductive electrode yarn M2 extend along the longitudinal direction of the fabric. The conductive electrode yarn S2 is arranged in a serpentine pattern with back-and-forth folds and is divided into two parts along the transverse direction of the fabric. One part contacts all the conductive electrode yarns M2 to form the second main body, and the other part forms m second finger-like branches.

6. The integrally molded warp-knitted three-dimensional electrothermal fabric according to claim 5, characterized in that, Conductive electrode yarn S1 is embedded in the first insulating knitted layer in a weft-insertion manner; conductive electrode yarn S2 is embedded in the second insulating knitted layer in a weft-insertion manner; conductive electrode yarn M1 is embedded in the first insulating knitted layer in one or more of the following methods: warp-insertion, weft-insertion, and loop-forming; conductive electrode yarn M2 is embedded in the second insulating knitted layer in one or more of the following methods: warp-insertion, weft-insertion, and loop-forming.

7. The integrally molded warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The width of the first or second main stem is 10-30 mm, and the width of the first or second finger branch is 2-35 mm; in the projection perpendicular to the fabric plane, the distance between adjacent first and second finger branches is 2-30 mm.

8. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The non-heating area of ​​the spacer layer is made of insulating yarn, which is one or more of the following: cotton, wool, silk, linen, polyester, nylon, acrylic, chlorofiber, acrylic chlorofiber, polypropylene, vinylon, spandex, glass fiber, aramid, polyimide fiber, acrylic pre-oxidized yarn, viscose, Tencel, Lyocell, Modal, and cellulose acetate.

9. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The heating zone of the spacer layer is made of resistance heating yarn, which is one or more of the following: metal conductive yarn, carbon-based conductive yarn, conductive polymer yarn, and yarn coated with conductive material, with a line resistance of 1000~1000000Ω / cm.

10. The integrally molded warp-knitted three-dimensional electrothermal fabric according to claim 5, characterized in that, The conductive electrode yarns S1, S2, and M2 are each independently selected from one or more of the following: metal conductive yarn, carbon-based conductive yarn, conductive polymer yarn, and yarn coated with conductive material, and their line resistance is 0.01~10Ω / cm.

11. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The heating zone of the spacer layer is woven in one or more of the following ways: chain knitting, plain weave, pile weave, twill weave, satin weave, and modified weave. The non-heating zone of the spacer layer is woven in one or more of the following ways: chain knitting, plain weave, pile weave, twill weave, satin weave, and modified weave.

12. The integrally formed warp-knitted three-dimensional electrothermal fabric according to claim 1, characterized in that, The thickness of the one-piece warp-knitted three-dimensional electric heating fabric is 2.5~40mm.

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