Woven heating fabric and weaving method thereof

Abstract

The present invention provides a woven heating fabric and a weaving method thereof. The woven heating fabric includes weft yarns, a plurality of groups of central fixed warp yarns and side conductive warp yarns fixedly connected to the weft yarns, and a power source connected to the side conductive warp yarns; the weft yarns include electric heating fibers and insulating heat-conductive fibers arranged on both sides of the electric heating fibers; each group of central fixed warp yarns includes a ground warp and a twisted warp fixedly connected to the weft yarns in a twisted-plain cyclic interweaving manner; the ground warp and twisted warp of two adjacent groups of central fixed warp yarns are symmetrically distributed on the upper and lower sides of the same weft yarn; the side conductive warp yarns include conductive warp yarns laid flat on the upper and lower sides of the weft yarns, and a binding structure is formed at the intersection of the side conductive warp yarns and the weft yarns by a binding yarn. The structure of the present invention avoids the disadvantage of tilting of the woven heating fabric, while allowing the electric heating fibers to tend to be straightened to the greatest extent, avoiding changes in resistance value; and can also flexibly change the resistance of the heating fabric by adjusting the number of electric heating fibers per unit length.

Description

Technical Field

[0001] The present invention relates to the technical field of functional textiles, and in particular to a woven heating fabric and a weaving method thereof. Background Art

[0002] Heating fabrics are textiles with conductive materials applied to their surface or interior that heat when electricity is applied. This technology can be used in thermal clothing, bedding, car seats, and other applications. The research behind heating fabrics stems primarily from the need for comfort and warmth against human skin. In cold climates, people often rely on external heat sources to maintain body temperature. Traditional heating devices, such as electric heaters, hot water bottles, and electric blankets, are not portable and restrict people's freedom of movement. Heating fabrics offer a new solution to meet this demand for portable heating devices. They are lightweight, soft, wearable, and temperature-adjustable, enabling personalized heating experiences. Furthermore, heating fabrics have medical applications, such as treating muscle soreness, arthritis, and other problems. They can also be used in outdoor sports, the military, and industry to provide additional warmth. Therefore, heating fabrics have high practical value.

[0003] Currently, heating fabrics are primarily produced by weaving conductive yarns or filaments with high-temperature-resistant yarns or filaments. The resulting electrically heated fabrics are thin and flexible, and their resistance can be adjusted by adjusting the number and arrangement of the conductive filaments. For example, patent publication number CN103533683B discloses a flexible heating fabric system. This system incorporates multiple metal filaments or metal-coated yarns on either side of the warp direction, and evenly spaced metal filaments or metal-coated yarns with adjustable lengths in the weft direction. The fabric is then interwoven with ordinary polyester staple fibers in plain, twill, or satin weaves, resulting in a fabric with heating function. While this method can automatically control temperature and adjust the resistance of the heating fabric, the electrically heated fabric produced by this method still has limitations. First, the interweaving structure employed in this method causes the conductive yarns or filaments to bend with each interweaving. Therefore, this method is only suitable for conductive fibers (such as metal fibers and metal-coated fibers) whose resistance changes little after bending. However, metal filaments and metal-coated fibers have low resistance, resulting in higher currents at the same voltage, leading to a lower safety factor. Secondly, this method arranges metal wire weft yarn and polyester staple yarn in an alternating manner in the warp direction. After the electric heating yarn and filament are heated, the temperature will be much higher than that of polyester fiber. Polyester fiber is a poor temperature conductor. The heat diffuses slowly from the high-temperature area to the low-temperature area, resulting in uneven heat distribution of the entire fabric. Finally, the fabric prepared by this method through plain, twill or satin weave has a high-density structure, that is, the warp and weft fibers are closely arranged, so it is easy for the conductive fibers to contact each other and cause short circuits. At the same time, if the warp and weft fiber arrangement is changed to a sparse arrangement, the fabric will become loose as a whole, and the fibers will easily slip, thereby increasing the possibility of short circuits caused by contact between the conductive fibers.

[0004] In order to improve the safety of heating fabrics when worn or in a home environment, the use of conductive materials with higher resistance (graphene fiber, carbon-coated fiber, carbon fiber, etc.) is an effective method. However, the current conductive fibers with higher resistance often have the defects of greater rigidity and greater resistance change after bending. If a simple plain weave (plain, twill, satin, etc.) is used for weaving, the resistance of the resulting fabric will change greatly, making it difficult to control the quality of the product. The twisted structure is a type of woven fabric structure. The gauze structure formed is different from plain, twill and satin. Its unique interweaving method can effectively reduce the bending of the weft yarn and effectively prevent the slippage of the warp and weft fibers when weaving a relatively sparse fabric. Therefore, it is often used to prepare fabrics with sparse warp and weft fiber arrangement, and the fabrics prepared using the twisted structure have the characteristics of being light and thin. It can be seen that the use of a twisted structure can effectively solve the problem of conductive fibers bending or conductive fiber contact due to the close arrangement of fibers. In addition, the weft yarns of the twisted structure can all or most of them be made of conductive yarns or filaments, so that all areas belong to the high-temperature heating zone and the heat distribution is uniform. The number of conductive yarns or filaments in the fabric per unit area can also be controlled by the arrangement density of the weft yarn, thereby achieving resistance regulation. The patent with the authorization announcement number CN202475801U discloses an electric heating film, which uses a twisted structure in the middle to fix the polyester monofilament with the heating conductive fiber, and a plain weave structure on both sides to combine the external power yarn with the conductive heating yarn. Although this structure avoids the resistance change of the conductive heating yarn due to bending, the structure still has disadvantages: First, the traditional twisted weaving method used in the middle fabric will cause the twisted mouth to be in the same direction, and the stress generated will cause the fabric to tilt, the fabric surface to be uneven, and the structure to be loose; secondly, only using the ordinary twisted weaving method will cause the conductive heating yarn to be unstable, easy to fall apart or easy to contact each other and cause a short circuit; thirdly, the plain weave structure is used on the edge of the structure, which will cause the conductive heating yarn to bend and the edge of the cloth to fall apart easily.

[0005] In view of this, it is necessary to design an improved woven heating fabric and a weaving method thereof to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a woven heating fabric and a weaving method thereof, which uses a twisted-plain weave cyclic interweaving method and insulating thermal conductive fibers, and simultaneously controls the interweaving directions of adjacent middle fixed warp yarns on the same weft yarn to be opposite, thereby avoiding the drawbacks of tilting and uneven surface of the woven heating fabric, and at the same time enables the electric heating fibers to be straightened to the greatest extent, thereby avoiding the large-scale change in resistance value caused by bending of the electric heating fibers, which makes it impossible to control the overall resistance value change and heating effect; and can also flexibly adjust the number of electric heating fibers per unit length, so that the resulting woven heating fabric has a wider range of applications.

[0007] To achieve the above-mentioned object of the invention, the present invention provides a woven heating fabric, comprising weft yarns, a plurality of groups of central fixed warp yarns and side conductive warp yarns fixedly connected to the weft yarns, and a power source connected to the side conductive warp yarns, wherein the side conductive warp yarns are arranged on both sides of the central fixed warp yarns;

[0008] The weft yarn includes an electric heating fiber and insulating heat-conductive fibers arranged on both sides of the electric heating fiber;

[0009] Each group of the central fixed warp yarns includes a ground warp and a twisted warp fixedly connected to the weft yarn in a twisted-plain weave cyclic interweaving manner; the ground warp and twisted warp of two adjacent groups of the central fixed warp yarns are symmetrically distributed on the upper and lower sides of the same weft yarn;

[0010] The edge conductive warp yarns include conductive warp yarns laid flat on the upper and lower sides of the weft yarns, and the intersections of the edge conductive warp yarns and the weft yarns are bound by binding yarns to form a binding structure.

[0011] As a further improvement of the present invention, the twisted weave-plain weave cyclic interweaving mode is a cyclic twisted weave mode of one twisted weave-n plain weaves, where n is an odd number of 1-7.

[0012] As a further improvement of the present invention, the binding direction of the binding yarn is the same as the arrangement direction of the edge conductive warp yarn, and each of the edge conductive warp yarns includes at least two binding yarns in the arrangement direction; wherein, for the same intersection, at least one binding yarn is wrapped around from the lower right side of the edge conductive warp yarn to the upper side of the weft yarn intersecting with its upper left side, and then wrapped around to the lower right side of the edge conductive warp yarn, and at least one binding yarn is wrapped around from the upper left side of the edge conductive warp yarn to the lower side of the weft yarn intersecting with its lower right side, and then wrapped around to the upper left side of the edge conductive warp yarn, so that the left and right sides and the upper and lower sides of each edge conductive warp yarn form a binding structure with the weft yarn at the intersection.

[0013] As a further improvement of the present invention, the insulating thermal conductive fiber has better bending resistance than the electric heating fiber; the electric heating fiber includes one or more of graphene fiber, carbon fiber, graphene-coated fiber, and carbon-coated fiber; the insulating thermal conductive fiber includes one or more of glass fiber, basalt fiber, and quartz fiber.

[0014] As a further improvement of the present invention, the woven heating fabric also includes a PTC temperature control board electrically connected to the edge conductive warp yarn.

[0015] As a further improvement of the present invention, the woven heating fabric also includes a lock-edge twisted warp yarn arranged on the edge of the woven heating fabric; the lock-edge twisted warp yarn is one or more of polyester spun yarn, acrylic spun yarn, vinylon spun yarn, chloroprene spun yarn, nylon spun yarn, polypropylene spun yarn, and aramid spun yarn.

[0016] The present invention also provides a weaving method for the woven heating fabric described above, wherein after each weft insertion, the edges of the weft yarn are twisted with the overlock warp yarn, the edges of the weft yarn are woven with the edge conductive warp yarn and the binding yarn, and the middle of the weft yarn is twisted and flat-woven in a cyclic interweaving manner using the ground warp and the twisted warp; then the next weft insertion is performed, and the above weaving steps are repeated until the weaving is completed;

[0017] After each weft insertion, different weaving mechanisms are used to weave the two side edges, the side portions and the middle portion of the weft yarn respectively and simultaneously, and each group of yarns in the warp direction corresponds to a different weaving mechanism.

[0018] As a further improvement of the present invention, the weaving mechanism for performing twill weaving-plain weaving cyclic interweaving is a twill weaving-plain weaving mechanism, comprising three heald frames arranged in a front-to-rear manner, and a twill assembly, a twill traverse assembly, and a ground warp assembly respectively connected to different heald frames through heald strips, wherein the twill traverse assembly is arranged between the twill assembly and the ground warp assembly;

[0019] The warp strand transverse movement assembly includes a warp strand transverse movement frame, and the warp strand transverse movement frame is provided with a first clamping assembly and a second clamping assembly on both sides along the vertical direction; the first clamping assembly is provided with two flanges arranged up and down and a first magnetic strip located between the two flanges on a side close to the warp strand assembly, and the first clamping assembly is provided with a first slide groove for installing the ground warp assembly on a side close to the ground warp assembly; the second clamping assembly is provided with second slide grooves for installing the warp strand assembly and the ground warp assembly on both sides respectively;

[0020] The warp strand assembly includes a warp strand heald mounting frame and a protrusion provided on one side of the warp strand heald mounting frame, wherein the protrusion is provided with a second magnetic strip corresponding to the first magnetic strip;

[0021] The two adjacent twisted-plain weaving sub-mechanisms are arranged in a centrally symmetrical manner.

[0022] As a further improvement of the present invention, the ground warp and the twist warp are used in the middle of the weft yarn to perform twist weaving-plain weaving cyclic interweaving, which specifically includes the following steps:

[0023] S11. The ground warp passes through the heald of the ground warp assembly, and the twisted warp passes through the heald of the twisted warp assembly;

[0024] S12. The leash assembly descends, the leash traverse assembly and the ground warp assembly ascend, and the protrusion contacts the flange below the leash traverse frame, causing the leash assembly to move toward the second engaging assembly and engage in the second chute, thereby introducing the weft yarn.

[0025] S13. The leash assembly rises, the leash traverse assembly and the ground warp assembly descend, and the protrusion contacts the flange located above the leash traverse frame, causing the leash assembly to move toward the second engaging assembly and engage within the second chute. The ground warp and leash exchange vertical positions, completing the leash weaving process. The leash traverse assembly rises, causing the first magnetic strip to mate with the second magnetic strip.

[0026] S14. The hank assembly and the hank traverse assembly descend, the ground warp assembly rises, and the weft yarn is reintroduced;

[0027] S15. The hank assembly and the hank traverse assembly rise, the ground warp assembly falls, and the weft yarn is introduced again;

[0028] S16. Repeat steps S14 and S15 until the preset number of flat weaving is reached, completing a twist weaving - flat weaving process;

[0029] S17. Repeat steps S12-S16 to perform the next twist weaving-plain weaving process until the preset twist weaving-plain weaving cycle interweaving times are reached.

[0030] As a further improvement of the present invention, the edge of the weft yarn is woven with the edge conductive warp yarn and the binding yarn, specifically:

[0031] S21. The conductive warp yarns are arranged through the healds, and the two binding yarns are arranged through the upper and lower twisted healds;

[0032] S22. The heald is moved upward, the binding yarn passing through the upper twisted heald is moved upward, the binding yarn passing through the lower twisted heald is moved downward to form a fell of the weft yarn, and the weft yarn is introduced;

[0033] S23. The heald is moved downward, and the upper twisted heald is first moved laterally, and when it completely passes the position of the edge conductive warp yarn, it is moved downward again; the lower twisted heald is moved laterally in the opposite direction of the upper twisted heald, and when it completely passes the position of the edge conductive warp yarn, it is moved upward again, thereby completing the fixing of the weft yarn and the edge conductive warp yarn by the binding yarn;

[0034] S24. Repeat steps S22 and S23 until the weft yarn is completely woven.

[0035] The beneficial effects of the present invention are:

[0036] (1) The woven heating fabric provided by the present invention uses a twisted-plain weaving cyclic interweaving method and insulating thermal conductive fibers to simultaneously control the interweaving directions of the adjacent middle fixed warp yarns on the same weft yarn to be opposite. First, the interweaving directions of the adjacent middle fixed warp yarns on the same weft yarn (twisted interweaving and plain weaving) are opposite, and the ground warp and twisted warp yarns are used as a group of warp yarns for plain weaving. The two warp yarns are synergistically woven, so that the weft yarns are evenly stressed, avoiding the drawbacks of tilting and uneven surface of the woven heating fabric, and the bending force on the electric heating fiber is small; secondly, the presence of the insulating thermal conductive fibers not only provides certain support for the electric heating fibers, The electric heating fiber can be straightened to the greatest extent, and the bending stress generated by the interweaving mouth on the electric heating fiber is reduced, further making the electric heating fiber flat, so that the resistance of a single electric heating fiber remains stable. At the same time, during manufacturing, the insulating heat-conductive fibers on both sides can share the force of the fixed warp yarn in the middle on the electric heating fiber, making the electric heating fiber further straight. Thirdly, the twisted-plain weaving cyclic interweaving method can more flexibly adjust the number of electric heating fibers per unit length, thereby more flexibly adjusting the resistance value, making the range of resistance value wider, and the resulting woven heating fabric has a wider range of applications and is suitable for metal heating wires and non-metallic heating wires. In addition, compared with simple twisted and plain weaving, under the condition that the number of electric heating fibers per unit length is equal, the fabric obtained by the twisted-plain weaving cyclic interweaving method has better elasticity and tightness.

[0037] (2) The woven heating fabric provided by the present invention has insulating thermally conductive fibers, which can evenly transfer the uneven heat generated by graphene fibers, carbon fibers, graphene-coated fibers, and carbon-coated fibers, which have more or less uneven resistance values ​​at various locations, so that the heat at various locations of the resulting woven heating fabric is more uniform and the heat transfer is more moderate. The presence of insulating thermally conductive fibers can also block the mutual contact between adjacent heating fibers, reducing the possibility of short circuits due to contact between the heating fibers. In addition, the heating fabric is safe due to the use of low voltage and high resistance and low current.

[0038] (3) The woven heating fabric provided by the present invention can automatically control the temperature by setting a PTC temperature control board, and regulate the opening and closing of the electric heating fiber to achieve a constant temperature function. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a structural diagram of the woven heating fabric of the present invention.

[0040] Figure 2 for Figure 1 A magnified image of the middle figure.

[0041] Figure 3 for Figure 1 Enlarged view of B.

[0042] Figure 4 This is a structural diagram of the twisted weaving-plain weaving mechanism.

[0043] Figure 5 for Figure 4 Structural diagram of the middle warp assembly.

[0044] Figure 6 for Figure 4 Structural diagram of the mid-warp slewing assembly.

[0045] Figure 7 for Figure 4 Structural diagram of the Zhongdijing component.

[0046] Figure 8 The figure shows the relationship between the settings of two adjacent twisted-plain weaving mechanisms.

[0047] Figure 9 This is the structural diagram after 1 twist weave and 3 plain weave cycles.

[0048] Figure 10 For weaving Figure 9 The changing process of the twisted-plain weaving mechanism in the interweaving structure process.

[0049] Reference numerals

[0050] 1-weft yarn; 2-central fixed warp yarn; 3-edge conductive warp yarn; 4-binding yarn; 5-PTC temperature control board; 6-locked twisted warp yarn; 7-twisted-plain weaving mechanism; 11-electric heating fiber; 12-insulating thermal conductive fiber; 21-ground warp; 22-twisted warp; 71-twisted warp assembly; 72-twisted warp lateral movement assembly; 73-ground warp assembly; 711-twisted warp heald mounting frame; 712-bump; 713-second magnetic strip; 714-first heald mounting hole; 715-twisted warp heald eye; 721-twisted warp lateral movement frame; 722-first engaging assembly; 723-second engaging assembly; 724-flange; 725-first magnetic strip; 726-second heald mounting hole; 731-ground warp heald mounting frame; 732-third heald mounting hole; 733-ground warp heald eye. DETAILED DESCRIPTION

[0051] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0052] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0053] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0054] See also Figures 1 to 3 As shown, the present invention provides a woven heating fabric, including weft yarn 1, several groups of middle fixed warp yarns 2 and side conductive warp yarns 3 fixedly connected to the weft yarn 1, and a power supply connected to the side conductive warp yarns 3, and the side conductive warp yarns 3 are arranged on both sides of the middle fixed warp yarns 2.

[0055] The weft yarn 1 includes an electric heating fiber 11 and insulating heat-conducting fibers 12 arranged on both sides of the electric heating fiber 11. Two insulating heat-conducting fibers 12 and one electric heating fiber 11 constitute one weft yarn 1.

[0056] Each group of central fixed warp yarns 2 includes a ground warp 21 and a twisted warp 22 fixedly connected to the weft yarn 1 in a twisted-plain weave cyclic interweaving manner; the ground warp 21 and twisted warp 22 in two adjacent groups of central fixed warp yarns 2 are symmetrically distributed on the upper and lower sides of the same weft yarn 1.

[0057] The edge conductive warp yarns 3 include conductive warp yarns laid flat on the weft yarns 1, and the intersections of the edge conductive warp yarns 3 and the weft yarns 1 form a binding structure through the binding yarns 4. Preferably, each set of edge conductive warp yarns 3 includes two conductive warp yarns laid flat on the upper and lower sides of the weft yarn 1, sandwiching the weft yarn 1.

[0058] With such an arrangement, firstly, the interweaving directions of the adjacent middle fixed warp yarns 2 on the same weft yarn 1 are opposite, so that the weft yarn 1 is evenly stressed, avoiding the disadvantages of tilt and uneven surface of the woven heating fabric; secondly, the twisted-plain weaving cycle interweaving method can more flexibly adjust the number of electric heating fibers 11 per unit length, thereby more flexibly adjusting the resistance value, making the range of resistance value wider, and the application range of the resulting woven heating fabric wider; thirdly, the presence of the insulating thermal conductive fiber 12 reduces the bending stress generated by the interweaving mouth on the electric heating fiber 11, making the electric heating fiber 11 tend to be flat, so that the resistance of a single electric heating fiber 11 remains stable.

[0059] Specifically, the electric heating fiber 11 includes one or more of graphene fiber, carbon fiber, graphene-coated fiber, and carbon-coated fiber; the insulating thermal conductive fiber 12 includes one or more of glass fiber, basalt fiber, and quartz fiber (inorganic fibers such as glass fiber, basalt fiber, and quartz fiber have better thermal conductivity than organic fibers). Figure 2 and Figure 3As shown, two insulating thermal conductive fibers 12 clamp the electric heating fiber 11, and the insulating thermal conductive fibers 12 have better bending resistance than the electric heating fiber 11. With this arrangement, first, the highly resistant insulating thermal conductive fibers 12 on both sides provide a certain degree of support for the electric heating fiber 11. At the same time, with the binding and restraining effect of the central fixed warp yarn 2, the electric heating fiber 11 can be straightened to the greatest extent without bending, so its resistance value tends to be stable, thereby making the performance of the resulting woven heating fabric more stable. Secondly, during manufacturing, the insulating thermal conductive fibers 12 on both sides can share the force exerted by the central fixed warp yarn 2 on the electric heating fiber 11, making the electric heating fiber 11 further tend to be straight. Again, the resistance values ​​of graphene fibers, carbon fibers, graphene-coated fibers, and carbon-coated fibers are more or less uneven, so the heat generated in various places is uneven. Due to the presence of the insulating thermal conductive fiber 12, the heat generated by the electric heating fiber 11 is transferred to the insulating thermal conductive fiber 12 and then tends to be uniform in the insulating thermal conductive fiber 12, making the heat in various places of the resulting woven heating fabric more uniform.

[0060] Preferably, the twisted-plain weave cyclic interweaving method is a cyclic twisted weave method of 1 twisted weave-n plain weaves, where n is an odd number from 1 to 7. The number of plain weaves can be freely set according to the required pattern, the tightness of the woven heating fabric, and the resistance value requirements. The twisted-plain weave cyclic interweaving method can also improve the aesthetics of the fabric. The plain weave of the present invention uses two warp yarns, the ground warp 21 and the twisted warp 22, as a group of warp yarns to achieve plain weaving. First, the yarn fineness of the ground warp 21 and the twisted warp 22 is relatively fine, and the bending force generated on the electric heating fiber 11 is relatively small; secondly, compared with simple plain weaving, the yarn arrangement of the twisted-plain weave cyclic interweaving method is relatively sparse, further reducing the bending force generated by the ground warp 21 and the twisted warp 22 on the electric heating fiber 11; thirdly, compared with the plain weave method in which one warp yarn is used to shuttle up and down the weft yarn, the method of using the ground warp 21 and the twisted warp 22 as a group of warp yarns for plain weaving will further reduce the bending force on the electric heating fiber 11. At the same time, with the help of the insulating heat-conducting fiber 12, the twisted-plain weaving cyclic interweaving method of the present invention can also keep the electric heating fiber 11 straight without bending.

[0061] The ground warps 21 and twisted warps 22 in two adjacent groups of middle fixed warp yarns 2 are symmetrically distributed on the upper and lower sides of the same weft yarn 1 (one of the two yarns in each group of middle fixed warp yarns 2 is the ground warp 21 and the other is the twisted warp 22, and there is no strict restriction on which is the ground warp 21 and which is the twisted warp 22). Specifically, if Figure 3In the fourth row from top to bottom, the weft yarn 1 is shown as follows: from left to right, the left-hand warp yarn (ground warp 21) of the first group of central fixed warp yarns 2 is arranged below weft yarn 1, and the right-hand warp yarn (twisted warp 22) is arranged above weft yarn 1. In the second group of central fixed warp yarns 2, the left-hand warp yarn (ground warp 21) is arranged above weft yarn 1, and the right-hand warp yarn (twisted warp 22) is arranged below weft yarn 1. Thus, the first and second groups of central fixed warp yarns 2 are symmetrically distributed above and below the same weft yarn 1. The remaining groups of central fixed warp yarns 2 are arranged in this manner. (If n is an even number in the cyclic twill weave, i.e., one twill weave followed by an even number of plain weaves, this symmetrical arrangement may not be achieved in some locations, so n is an odd number.) Therefore, the interweaving holes formed by the first group of middle fixed warp yarns 2 and the second group of middle fixed warp yarns 2 on the weft yarn 1 are in opposite directions, that is, the interweaving holes formed by adjacent middle fixed warp yarns 2 on the same weft yarn 1 are in opposite directions, and the tension generated by adjacent interweaving holes on the weft yarn 1 is in opposite directions, so that the weft yarn 1 is evenly stressed, and the overall tilt of the woven heating fabric will not occur.

[0062] The middle fixed warp yarn 2 includes one or more of polypropylene multifilament, glass fiber filament, and basalt fiber filament, and its fineness is 70-120 tex.

[0063] The surface texture of the woven heating fabric is one of plain, twill and satin. Figure 1 As shown, in some embodiments, the twisted woven structure is arranged along a diagonal line to form a twill structure.

[0064] like Figure 2 As shown, the binding direction of the binding yarn 4 is the same as the arrangement direction of the edge conductive warp yarns 3, and each edge conductive warp yarn 3 includes at least two binding yarns 4 in the arrangement direction. Specifically, at the same intersection, at least one binding yarn 4 is wound from the lower right side of the edge conductive warp yarn 3 to the upper side of the weft yarn 1 intersecting with its upper left side, and then to the lower right side of the edge conductive warp yarn 3. At least one binding yarn 4 is wound from the upper left side of the edge conductive warp yarn 3 to the lower side of the weft yarn 1 intersecting with its lower right side, and then to the upper left side of the edge conductive warp yarn 3. This ensures that the left and right sides and the upper and lower sides of each edge conductive warp yarn 3 are bound to the weft yarn 1 at the intersection. It can be seen that the edge conductive warp yarn 3 is in contact with the weft yarn 1, but no interweaving occurs.

[0065] In some embodiments, the edge conductive warp yarns 3 are divided into several groups, and each group of edge conductive warp yarns 3 includes two conductive warp yarns laid flat on the upper and lower sides of the weft yarn 1. In this case, only two binding yarns 4 are required in the same direction of the edge conductive warp yarns 3 throughout the entire thickness. During weaving, one binding yarn 4 is wound from the lower right side of the lower edge conductive warp yarn 3 to the upper side of the weft yarn 1 intersecting with its upper left side, and then wound to the lower right side of the lower edge conductive warp yarn 3. The other binding yarn 4 is wound from the upper left side of the upper edge conductive warp yarn 3 to the lower side of the weft yarn 1 intersecting with its lower right side, and then wound to the upper left side of the upper edge conductive warp yarn 3. With this arrangement, firstly, the curved winding binding structure of the present invention keeps the edge conductive warp yarns 3 and the electric heating fibers 11 in a straight state, avoiding changes in resistance caused by bending; secondly, only two binding yarns are required in the same warp direction throughout the entire thickness, which can reduce the weight of the woven body to a certain extent.

[0066] The conductive warp yarn 3 of the edge portion is copper wire. The binding yarn 4 is one or more of glass fiber and polypropylene monofilament.

[0067] like Figure 1 As shown, the woven heating fabric also includes a PTC temperature control board 5 electrically connected to the edge conductive warp yarn 3. The PTC temperature control board 5 is installed on the heating fabric and is set in the main circuit. The setting of the PTC temperature control board 5 can automatically control the temperature. Specifically, when the temperature reaches the preset value of the PTC temperature control board 5, the PTC temperature control board 5 automatically disconnects, breaking the circuit, and the electric heating fiber 11 cannot form a conductive path, and heating stops. When the temperature drops below the preset temperature of the PTC temperature control board 5, the PTC temperature control board 5 automatically disconnects, the electric heating fiber 11 forms a conductive path, and heating begins.

[0068] The woven heating fabric also includes a lock-stitched warp yarn 6 disposed at the edge of the woven heating fabric. The lock-stitched warp yarn 6 is one or more of polyester spun yarn, acrylic spun yarn, vinylon spun yarn, chloroprene spun yarn, nylon spun yarn, polypropylene spun yarn, and aramid spun yarn. The lock-stitched warp yarn 6 is used to further secure and lock the edge to prevent it from unraveling.

[0069] The present invention also provides a weaving method for the aforementioned woven heating fabric. After each weft insertion, the edges of the weft yarn 1 are twisted with overlock warp yarns 6. The edges of the weft yarn 1 are woven with conductive edge warp yarns 3 and binding yarns 4. The middle portion of the weft yarn 1 is woven with ground warp 21 and twist warp 22 in a twist-and-plain weave cycle. The next weft insertion is then performed, and the above weaving steps are repeated until the weaving is complete. Finally, a PTC temperature control board 5 is connected to the main circuit via a wire and attached to the heating fabric.

[0070] After each weft insertion, different weaving mechanisms are used to weave the two side edges, sides and middle of the weft yarn 1 respectively and simultaneously. Each group of yarns in the warp direction corresponds to a different weaving mechanism. Different weaving mechanisms do not affect each other and work independently.

[0071] The weaving process of the edges, sides and middle parts on both sides is explained below respectively. It is worth noting that in the overall weaving process, after each weft insertion, the weaving of the edges, sides and middle parts on both sides is carried out simultaneously and does not interfere with each other; the time required for weaving after each weft insertion can be set to be the same in different weaving mechanisms. In this way, after each weft insertion, the time required to complete the weaving of the edges, sides and middle parts on both sides is basically the same, and then the next weft insertion is carried out to ensure the smooth and continuous weaving process.

[0072] Specifically, when the edges of the weft yarn 1 are twisted with the lock-twisted warp yarn 6, two identical twisting mechanisms are set on the edges of the woven heating fabric on both sides, with the lock-twisted warp yarn 6 as the warp yarn and the weft yarn 1 as the weft yarn, and the weft is woven by the traditional twisting process. The twisting equipment and process are conventional technical means in this field and will not be described in detail here. It is worth noting that the weft yarn 1 is composed of an electric heating fiber 11 and an insulating thermal conductive fiber 12 arranged on both sides of the electric heating fiber 11. When inserting the weft, an insulating thermal conductive fiber 12, an electric heating fiber 11 and an insulating thermal conductive fiber 12 are introduced in sequence, and the electric heating fiber 11 and the two insulating thermal conductive fibers 12 are laid flat. During the weaving process, the electric heating fiber 11 and the two insulating thermal conductive fibers 12 are woven as a whole weft yarn 1.

[0073] When the edge of the weft yarn 1 is woven with the edge conductive warp yarn 3 and the binding yarn 4, in order to obtain Figure 1 The woven heating fabric shown can be provided with three independent, identical weaving mechanisms at the three sets of edge conductive warp yarns 3 on both sides; specifically, the steps include: (taking each set of edge conductive warp yarns 3 including two conductive warp yarns laid flat on the upper and lower sides of the weft yarn 1 as an example for explanation. For more specific methods, see patent application number CN202210914826.3)

[0074] S21. The upper conductive warp yarn and the lower conductive warp yarn are arranged through the healds, and the two binding yarns 4 are respectively passed through the upper and lower twisted healds and arranged;

[0075] S22. The upper conductive warp yarn moves upward, and the lower conductive warp yarn moves downward to form a non-woven opening; the binding yarn 4 moves upward through the upper twisted heald, and the binding yarn 4 moves downward through the lower twisted heald to form the weft fell, and then sequentially introduces the insulating thermal conductive fiber 12, the electric heating fiber 11 and the insulating thermal conductive fiber 12;

[0076] S23. The upper conductive warp yarn moves downward, and the lower conductive warp yarn moves upward until the two conductive warp yarns are parallel to each other and close to the contact state, closing the non-woven opening; the upper twisted heald is first moved laterally to drive the binding yarn 4 passing through the upper twisted heald to move laterally. When it completely passes the edge conductive warp yarn position, it is moved downward again. The lower twisted heald is moved laterally in the opposite direction to the upper twisted heald to drive the binding yarn 4 passing through the lower twisted heald to move laterally. When it completely passes the edge conductive warp yarn position, it is moved upward again, thus completing the fixing of the binding yarn 4 to the weft yarn 1 and the edge conductive warp yarn 3;

[0077] S24. Repeat steps S22 and S23 until the weft yarn 1 is completely woven.

[0078] When the ground warp 21 and the twist warp 22 are used to perform the twist weaving-plain weaving cycle interweaving in the middle part of the weft yarn 1, the twist weaving-plain weaving separate weaving mechanism 7 is used.

[0079] Specifically, the twill weaving-plain weaving mechanism 7 includes three heald frames arranged in front and back (not shown in the figure) and a twill assembly 71, a twill traverse assembly 72 and a ground warp assembly 73 connected to different heald frames through heald strips (other components are conventional in the art and will not be described in detail here). Figures 4 to 7 As shown, the warp traverse assembly 72 is arranged between the warp assembly 71 and the ground warp assembly 73.

[0080] The warp traverse assembly 72 includes a warp traverse frame 721, which is provided with a first engaging assembly 722 and a second engaging assembly 723 on both sides of the vertical direction. The first engaging assembly 722 is provided with two flanges 724 arranged vertically on the side close to the warp assembly 71 (in the front-to-back direction) and a first magnetic strip 725 (similar to a magnet) located between the two flanges 724; the first engaging assembly 722 is provided with a first slide for installing the ground warp assembly 73 on the side close to the ground warp assembly 73; and the second engaging assembly 723 is provided with second slides for installing the warp assembly 71 and the ground warp assembly 73 on both sides. The upper and lower sides of the warp traverse frame 721 are also provided with second heald mounting holes 726 for the heald strips to pass through. The two heald strips are fixedly connected to the corresponding heald frames through the second heald mounting holes 726 arranged vertically.

[0081] The warp strand assembly 71 includes a warp strand mounting frame 711 and a protrusion 712 disposed on one side of the warp strand mounting frame 711. The protrusion 712 is located on the same side as the first engaging assembly 722. The protrusion 712 is provided with a second magnetic strip 713 (similar to a magnet) corresponding to the first magnetic strip 725. With this arrangement, when the protrusion 712 is engaged between the two flanges 724, the second magnetic strip 713 and the first magnetic strip 725 attract each other, thereby achieving the connection between the warp strand assembly 71 and the warp strand transverse movement assembly 72. When the protrusion 712 contacts the outermost positions of the two flanges 724, the warp strand assembly 71 moves toward the second engaging assembly 723 and engages in the second chute, thereby achieving the connection between the warp strand assembly 71 and the warp strand transverse movement assembly 72. The upper and lower sides of the twisted heald mounting frame 711 are also provided with first heald mounting holes 714 for the heald strips to pass through. The two heald strips pass through the first heald mounting holes 714 set up above and below and are fixedly connected to the corresponding heald frames. The healds are then connected to the heald strips to achieve the connection between the healds and the heald frames. Figure 5 As shown, a heald extends from top to bottom into the interior of the twisted warp heald mounting frame 711, and a twisted warp heald eye 715 is provided on the heald for the twisted warp 22 to pass through.

[0082] The ground warp assembly 73 includes a ground warp heald mounting frame 731 and third heald mounting holes 732 provided on the upper and lower sides of the ground warp heald mounting frame 731 for the healds to pass through. The two healds are respectively fixed to the heald frame through the third heald mounting holes 732 provided on the upper and lower sides. Figure 7 As shown, the two heald wires are respectively passed through the third heald wire mounting holes 732 set up above and below and fixedly connected to the corresponding heald frames, and the healds are then connected to the heald wires to achieve the connection between the healds and the heald frames. Figure 7 As shown, a heald extends from bottom to top into the interior of the ground warp heald mounting frame 731, and the heald is provided with a ground warp heald eyelet 733 for passing the ground warp 21. The ground warp assembly 73 is slidably connected to the warp traverse assembly 72 along both sides of the vertical direction through the first sliding groove on the first engaging assembly 722 and the second sliding groove on the second engaging assembly 723.

[0083] The warp assembly 71, the warp traverse assembly 72 and the ground warp assembly 73 remain connected to each other during the entire weaving process. The up and down movement of the warp assembly 71, the warp traverse assembly 72 and the ground warp assembly 73 is achieved by the up and down movement of the corresponding heald frame (i.e. the heald frame fixedly connected thereto).

[0084] When the ground warp 21 and the twist warp 22 are used to perform twist-weave-plain weaving in the middle of the weft yarn 1, according to the number of groups of the middle fixed warp yarn 2 required in the middle of the woven heating fabric, a twist-weave-plain weaving sub-weaving mechanism 7 corresponding to the number of groups is set, and two adjacent twist-weave-plain weaving sub-weaving mechanisms 7 are arranged in a centrally symmetrical manner (such as Figure 8The specific steps are as follows: (take 1-time twist weave-3-time plain weave cycle interweaving as an example)

[0085] S11. Pass the ground warp 21 through the ground warp heald eye 733 on the ground warp assembly 73 , and pass the leash warp 22 through the leash heald eye 715 on the leash assembly 71 .

[0086] S12. Figure 10 As shown in a, the warp assembly 71 descends, the warp lateral movement assembly 72 and the ground warp assembly 73 rise, and at this time the protrusion 712 contacts the outermost edge of the flange 724 located below the warp lateral movement frame 721, so that the warp assembly 71 moves toward the side of the second engaging assembly 723 (that is, the warp assembly 71 is pushed to the right) and engages in the second chute to form the weft fell of the weft yarn, and then the insulating thermal conductive fiber 12, the electric heating fiber 11 and the insulating thermal conductive fiber 12 are introduced in sequence.

[0087] S13. Figure 10 As shown in b, the warp assembly 71 rises, the warp lateral movement assembly 72 and the ground warp assembly 73 descend, and the protrusion 712 first passes between the two flanges 724, and then contacts the flange 724 located above the warp lateral movement frame 721, so that the warp assembly 71 moves toward the side of the second engaging assembly 723 again (that is, the warp assembly 71 first returns to its original position and is pushed to the right again), and is engaged in the second chute, and the ground warp 21 and the warp 22 exchange upper and lower positions, and are twisted so that the ground warp 21 and the warp 22 are twisted together to form an interweaving point, completing the weaving process; as shown in Figure 10 As shown in Figure c, the warp slewing assembly 72 rises (the warp slewing assembly 71 and the ground warp assembly 73 remain stationary). At this time, the attraction between the first magnetic strip 725 and the second magnetic strip 713 causes the protrusion 712 to be located between the two flanges 724 (i.e., the warp slewing assembly 71 is attracted to the left). No weft insertion is required during this process.

[0088] S14. Figure 10 As shown in d, the twisted warp assembly 71 and the twisted warp lateral movement assembly 72 descend, and the ground warp assembly 73 rises to form the weft fell again, and then the insulating thermal conductive fiber 12, the electric heating fiber 11 and the insulating thermal conductive fiber 12 are introduced in sequence for the first flat weaving.

[0089] S15. Figure 10 As shown in FIG. 5 , the twisted warp assembly 71 and the twisted warp transverse shift assembly 72 rise, and the ground warp assembly 73 falls to form the weft fell again, and then the insulating thermal conductive fiber 12, the electric heating fiber 11 and the insulating thermal conductive fiber 12 are introduced in sequence for the second flat weaving.

[0090] S16. Figure 10As shown in FIG. 5 , the twisted warp assembly 71 and the twisted warp transverse shift assembly 72 descend, and the ground warp assembly 73 rises to form the weft fell again, and then the insulating thermal conductive fiber 12, the electric heating fiber 11 and the insulating thermal conductive fiber 12 are introduced in sequence to perform the third plain weaving; the plain weaving process is completed.

[0091] S17. Figure 10 As shown in g, the twisted warp assembly 71 and the twisted warp traverse assembly 72 rise, the ground warp assembly 73 falls, the ground warp 21 and the twisted warp 22 exchange their upper and lower positions, and twist the ground warp 21 and the twisted warp 22 to form an interlacing point; then as shown in Figure 10 As shown in h, the warp tranverse movement assembly 72 descends (the warp tranverse assembly 71 and the ground warp assembly 73 remain stationary). At this time, the protrusion 712 contacts the outermost edge of the flange 724 located above the warp tranverse movement frame 721, so that the warp tranverse assembly 71 moves toward the side of the second engaging assembly 723 (that is, the warp tranverse assembly 71 is pushed to the right). No weft insertion is required during this process.

[0092] S18. Figure 10 As shown in FIG. 1 , step S12 is repeated, the warp strand assembly 71 descends, the warp strand lateral movement assembly 72 and the ground warp assembly 73 ascend, and the protrusion 712 contacts the outermost edge of the flange 724 located below the warp strand lateral movement frame 721, so that the warp strand assembly 71 moves toward the side of the second engaging assembly 723 (i.e., the warp strand assembly 71 is pushed to the right), and is engaged in the second chute to form the weft fell of the weft yarn, and then the insulating thermal conductive fiber 12, the electric heating fiber 11 and the insulating thermal conductive fiber 12 are introduced in sequence.

[0093] When it is necessary to weave Figure 1 In the structure shown in FIG, first, two adjacent twisted-plain weaving sub-mechanisms 7 are arranged in a centrally symmetrical manner (eg Figure 8 Secondly, it is necessary to set different weaving programs on each twisted weaving - plain weaving mechanism 7, for example, as Figure 1 In the middle weaving structure, the program of each twisted weave-plain weave sub-weaving mechanism 7 from left to right is as follows: (1) 1 plain weave-cycle (1 twisted weave-3 plain weaves); (2) cycle (1 twisted weave-3 plain weaves); (3) 3 plain weaves-cycle (1 twisted weave-3 plain weaves); (4) 2 plain weaves-cycle (1 twisted weave-3 plain weaves); (5) consistent with (1); (6) consistent with (2); (7) consistent with (3); (8) consistent with (4), and so on.

[0094] The present invention is described in detail below through specific embodiments:

[0095] Example 1

[0096] A woven heating fabric with a constant temperature of 35°C and a weft density of 2 yarns / cm; it includes weft yarn 1, several groups of insulating thermal conductive fibers 12 fixedly connected to the weft yarn 1 and edge conductive warp yarn 3, and a power supply (power supply voltage 12V) connected to the edge conductive warp yarn 3. The edge conductive warp yarn 3 is arranged on both sides of the central fixed warp yarn 2, and also includes a PTC temperature control board 5 electrically connected to the edge conductive warp yarn 3, and a lock-edge twisted warp yarn 6 arranged at the edge of the woven heating fabric.

[0097] The weft yarn 1 includes an electric heating fiber 11 and insulating heat-conducting fibers 12 arranged on both sides of the electric heating fiber 11. The electric heating fiber 11 is a graphene-coated fiber with a resistance of 300Ω; the insulating heat-conducting fiber 12 is a glass fiber with a fineness of 100tex.

[0098] Each group of central fixed warp yarns 2 includes a ground warp 21 and a twisted warp 22 fixedly connected to the weft yarn 1 in a cyclic twisting manner of one twisting and three flat weavings, that is, the central twisted warp yarn 2 is twisted with the weft yarn 1 once, and then flat weaved three times, so that a twisted weave point appears every three flat weave points on the same weft yarn 1. The overall structural effect of the resulting woven heating fabric is similar to twill, that is, the twisted structure is arranged along a diagonal line, forming a twill-like structure. The ground warp 21 and twisted warp 22 in the two adjacent groups of central fixed warp yarns 2 are symmetrically distributed on the upper and lower sides of the same weft yarn 1. The ground warp 21 and twisted warp 22 are made of soft polypropylene multifilament with a fineness of 72tex. The density of the central fixed warp yarn 2 in the part where the central fixed warp yarn 2 is fixed to the weft yarn 1 is 5 groups / cm, that is, there are 5 groups of interwoven ground warps 21 and twisted warps 22 per centimeter.

[0099] Each set of conductive edge warp yarns 3 consists of two conductive warp yarns laid flat on the upper and lower sides of the weft yarn 1. The intersection of the conductive edge warp yarns 3 and the weft yarn 1 forms a binding structure with a binder yarn 4. The conductive edge warp yarns 3 are copper wire; the binder yarn 4 is a relatively hard polypropylene monofilament with a fineness of 72 tex. The density of the conductive edge warp yarns 3 at the point where they are fixed to the weft yarn 1 is 6 sets / cm, meaning there are 6 sets of conductive edge warp yarns 3 arranged vertically per centimeter.

[0100] The overlock warp yarn 6 is a polyester staple yarn with a relatively high friction and a fineness of 72tex.

[0101] The PTC temperature control plate 5 of the woven heating fabric of Example 1 has a preset temperature of 35° C., which is suitable for a heating plate, and can be used for household heating tiles, cell culture incubator heating plates, etc., and can also be worn on the human body.

[0102] Example 2

[0103] A woven heating fabric with a constant temperature of 105°C and a weft density of 4 threads / cm; it includes weft yarn 1, several groups of insulating thermal conductive fibers 12 fixedly connected to the weft yarn 1 and edge conductive warp yarn 3, and a power supply (power supply voltage 12V) connected to the edge conductive warp yarn 3. The edge conductive warp yarn 3 is arranged on both sides of the central fixed warp yarn 2, and also includes a PTC temperature control board 5 electrically connected to the edge conductive warp yarn 3, and a lock-edge twisted warp yarn 6 arranged at the edge of the woven heating fabric.

[0104] The weft yarn 1 includes an electric heating fiber 11 and insulating heat-conducting fibers 12 arranged on both sides of the electric heating fiber 11. The electric heating fiber 11 is a carbon fiber with a resistance of 100Ω; the insulating heat-conducting fiber 12 is a basalt fiber with a fineness of 100tex.

[0105] Each group of central fixed warp yarns 2 includes a ground warp 21 and a twisted warp 22 fixedly connected to the weft yarn 1 in a cyclic twisting manner of one twisting and one flat weaving, that is, the central twisted warp yarn 2 is twisted once with the weft yarn 1, and then flat weaved once, so that each weft is a twisted weaving point every other flat weaving point. The overall structural effect of the resulting woven heating fabric is similar to that of a plain weave, that is, the twisted structure is arranged in sequence along the same weft yarn to form a structure similar to a plain weave. The ground warp 21 and twisted warp 22 in the two adjacent groups of central fixed warp yarns 2 are symmetrically distributed on the upper and lower sides of the same weft yarn 1. The ground warp 21 and twisted warp 22 are made of glass fiber filament with a fineness of 80tex. In the part where the central fixed warp yarn 2 is fixed to the weft yarn 1, the density of the central fixed warp yarn 2 is 5 groups / cm, that is, there are 5 groups of interwoven ground warps 21 and twisted warps 22 per centimeter.

[0106] Each set of conductive edge warp yarns 3 consists of two conductive warp yarns laid flat on the upper and lower sides of the weft yarn 1. The intersection of the conductive edge warp yarns 3 and the weft yarn 1 forms a binding structure with a binder yarn 4. The conductive edge warp yarns 3 are copper wire; the binder yarn 4 is glass fiber with a fineness of 190 tex. The density of the conductive edge warp yarns 3 at the point where they are fixed to the weft yarn 1 is 4 sets / cm, meaning there are four sets of conductive edge warp yarns 3 arranged vertically per centimeter.

[0107] The overlock warp yarn 6 is a polyester staple yarn with a relatively high friction and a fineness of 72tex.

[0108] The PTC temperature control plate 5 of the woven heating fabric of Example 2 has a preset temperature of 105° C., which is suitable for a heating plate and can be used in a water heating tank or boiler, etc.

[0109] Example 3

[0110] A woven heating fabric with a constant temperature of 200°C and a weft density of 5 yarns / cm; it includes weft yarn 1, several groups of insulating thermal conductive fibers 12 fixedly connected to the weft yarn 1 and edge conductive warp yarn 3, and a power supply (power supply voltage 220V) connected to the edge conductive warp yarn 3. The edge conductive warp yarn 3 is arranged on both sides of the central fixed warp yarn 2, and also includes a PTC temperature control board 5 electrically connected to the edge conductive warp yarn 3, and a lock-edge twisted warp yarn 6 arranged at the edge of the woven heating fabric.

[0111] The weft yarn 1 includes an electric heating fiber 11 and insulating heat-conducting fibers 12 arranged on both sides of the electric heating fiber 11. The electric heating fiber 11 is a carbon fiber with a resistance of 60Ω; the insulating heat-conducting fiber 12 is a basalt fiber with a fineness of 100tex.

[0112] Each group of central fixed warp yarns 2 includes a ground warp 21 and a twisted warp 22 fixedly connected to the weft yarn 1 in a cyclic twisting manner of one twisting and three flat weavings, that is, the central twisted warp yarn 2 is twisted with the weft yarn 1 once, and then flat weaved three times, so that every three flat weave points on the same weft yarn 1 are a twisted weave point. The overall structural effect of the resulting woven heating fabric is similar to twill, that is, the twisted structure is arranged along a diagonal line to form a structure similar to twill. The ground warp 21 and twisted warp 22 in the two adjacent groups of central fixed warp yarns 2 are symmetrically distributed on the upper and lower sides of the same weft yarn 1. The ground warp 21 and twisted warp 22 are made of basalt fiber filaments with a fineness of 120tex. The density of the central fixed warp yarn 2 in the part where the central fixed warp yarn 2 is fixed to the weft yarn 1 is 5 groups / cm, that is, there are 5 groups of interwoven ground warps 21 and twisted warps 22 per centimeter.

[0113] Each set of conductive edge warp yarns 3 consists of two conductive warp yarns laid flat on the upper and lower sides of the weft yarn 1. The intersection of the conductive edge warp yarns 3 and the weft yarn 1 forms a binding structure with a binder yarn 4. The conductive edge warp yarns 3 are copper wire; the binder yarn 4 is glass fiber with a fineness of 190 tex. The density of the conductive edge warp yarns 3 at the point where they are fixed to the weft yarn 1 is 4 sets / cm, meaning there are four sets of conductive edge warp yarns 3 arranged vertically per centimeter.

[0114] The lock-edge twisted warp yarn 6 is aramid staple yarn with a fineness of 80tex.

[0115] The PTC temperature control plate 5 of the woven heating fabric of Example 3 has a preset temperature of 200° C., which is suitable for a heating plate and can be used in an oil heating tank or boiler in a factory.

[0116] In summary, the woven heating fabric and its weaving method provided by the present invention, with the help of the twisted-plain weaving cyclic interweaving method and insulating thermal conductive fibers, simultaneously control the opposite directions of the interweaving mouths of adjacent middle fixed warp yarns on the same weft yarn, thereby avoiding the disadvantages of tilt and uneven surface of the woven heating fabric, and at the same time allowing the electric heating fibers to tend to be straightened to the greatest extent, avoiding changes in resistance value; it can also flexibly adjust the number of electric heating fibers per unit length, so that the resulting woven heating fabric has a wider range of applications; the presence of insulating thermal conductive fibers can make heat transfer more gentle and even, and can also block the mutual contact between adjacent electric heating fibers, reducing the possibility of short circuit due to contact between electric heating fibers, and improving the safety of the woven heating fabric.

[0117] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for weaving a woven heating fabric, characterized in that: After each weft insertion, the edges of the weft yarn are twisted with the overlock warp yarn, the edges of the weft yarn are woven with the edge conductive warp yarn and the binding yarn, and the middle of the weft yarn is twisted and flat-woven in a cyclic interweaving manner with the ground warp and the twist warp; then the next weft insertion is performed, and the above weaving steps are repeated until the weaving is completed; After each weft insertion, different weaving mechanisms are used to weave the two side edges, sides and middle of the weft yarn respectively and simultaneously, and each group of yarns in the warp direction corresponds to a different weaving mechanism; The weaving mechanism for performing twill weaving-plain weaving cyclic interweaving is a twill weaving-plain weaving mechanism, comprising three heald frames arranged in a front-to-rear manner, and a twill assembly, a twill traverse assembly, and a ground warp assembly connected to different heald frames respectively through heald strips, wherein the twill traverse assembly is arranged between the twill assembly and the ground warp assembly; The warp strand transverse movement assembly includes a warp strand transverse movement frame, and the warp strand transverse movement frame is provided with a first clamping assembly and a second clamping assembly on both sides along the vertical direction; the first clamping assembly is provided with two flanges arranged up and down and a first magnetic strip located between the two flanges on a side close to the warp strand assembly, and the first clamping assembly is provided with a first slide groove for installing the ground warp assembly on a side close to the ground warp assembly; the second clamping assembly is provided with second slide grooves for installing the warp strand assembly and the ground warp assembly on both sides respectively; The warp strand assembly includes a warp strand heald mounting frame and a protrusion provided on one side of the warp strand heald mounting frame, wherein the protrusion is provided with a second magnetic strip corresponding to the first magnetic strip; The two adjacent twisted-plain weaving sub-mechanisms are arranged in a centrally symmetrical manner.

2. The weaving method of the woven heating fabric according to claim 1, characterized in that: The ground warp and the twist warp are used to perform twist weaving-plain weaving cyclic interweaving in the middle of the weft yarn, which specifically includes the following steps: S11. The ground warp passes through the heald of the ground warp assembly, and the twisted warp passes through the heald of the twisted warp assembly; S12. The leash assembly descends, the leash traverse assembly and the ground warp assembly ascend, and the protrusion contacts the flange below the leash traverse frame, causing the leash assembly to move toward the second engaging assembly and engage in the second chute, thereby introducing the weft yarn. S13. The leash assembly rises, the leash traverse assembly and the ground warp assembly descend, and the protrusion contacts the flange located above the leash traverse frame, causing the leash assembly to move toward the second engaging assembly and engage within the second chute. The ground warp and leash exchange vertical positions, completing the leash weaving process. The leash traverse assembly rises, causing the first magnetic strip to mate with the second magnetic strip. S14. The hank assembly and the hank traverse assembly descend, the ground warp assembly rises, and the weft yarn is reintroduced; S15. The hank assembly and the hank traverse assembly rise, the ground warp assembly falls, and the weft yarn is introduced again; S16. Repeat steps S14 and S15 until the preset number of flat weaving is reached, completing a twist weaving - flat weaving process; S17. Repeat steps S12-S16 to perform the next twist weaving-plain weaving process until the preset twist weaving-plain weaving cycle interweaving times are reached.

3. The weaving method of the woven heating fabric according to claim 1, characterized in that: The conductive warp yarn and the binding yarn are used to weave the edge of the weft yarn, specifically: S21. The conductive warp yarns are arranged through the healds, and the two binding yarns are arranged through the upper and lower twisted healds; S22. The heald is moved upward, the binding yarn passing through the upper twisted heald is moved upward, the binding yarn passing through the lower twisted heald is moved downward to form a fell of the weft yarn, and the weft yarn is introduced; S23. The heald is moved downward, and the upper twisted heald is first moved laterally, and when it completely passes the position of the edge conductive warp yarn, it is moved downward again; the lower twisted heald is moved laterally in the opposite direction of the upper twisted heald, and when it completely passes the position of the edge conductive warp yarn, it is moved upward again, thereby completing the fixing of the weft yarn and the edge conductive warp yarn by the binding yarn; S24. Repeat steps S22 and S23 until the weft yarn is completely woven.

4. A woven heating fabric produced by the weaving method of the woven heating fabric according to any one of claims 1 to 3, characterized in that: It includes the weft yarns, a plurality of groups of middle fixed warp yarns fixedly connected to the weft yarns, the side conductive warp yarns, and a power source connected to the side conductive warp yarns, wherein the side conductive warp yarns are arranged on both sides of the middle fixed warp yarns; The weft yarn includes an electric heating fiber and insulating heat-conductive fibers arranged on both sides of the electric heating fiber; Each group of the central fixed warp yarns includes the ground warp and the twisted warp fixedly connected to the weft yarn in a twist-weave-plain weave cyclic interweaving manner; the ground warp and twisted warp of two adjacent groups of the central fixed warp yarns are symmetrically distributed on the upper and lower sides of the same weft yarn; The edge conductive warp yarns include conductive warp yarns laid flat on the upper and lower sides of the weft yarns, and the intersections of the edge conductive warp yarns and the weft yarns are bound by binding yarns to form a binding structure.

5. The woven heating fabric according to claim 4, characterized in that: The twist weaving-plain weaving cyclic interweaving mode is a cyclic twist weaving mode of one twist weaving-n plain weaving times, where n is an odd number of 1-7.

6. The woven heating fabric according to claim 4, characterized in that: The binding direction of the binding yarn is the same as the arrangement direction of the edge conductive warp yarn, and each of the edge conductive warp yarns includes at least two binding yarns in the arrangement direction; wherein, for the same intersection, at least one binding yarn is wound from the lower right side of the edge conductive warp yarn to the upper side of the weft yarn intersecting with its upper left side, and then wound to the lower right side of the edge conductive warp yarn, and at least one binding yarn is wound from the upper left side of the edge conductive warp yarn to the lower side of the weft yarn intersecting with its lower right side, and then wound to the upper left side of the edge conductive warp yarn, so that the left and right sides and the upper and lower sides of each edge conductive warp yarn form a binding structure with the weft yarn at the intersection.

7. The woven heating fabric according to claim 4, characterized in that: The insulating thermal conductive fiber has better bending resistance than the electric heating fiber; the electric heating fiber includes one or more of graphene fiber, carbon fiber, graphene-coated fiber, and carbon-coated fiber; the insulating thermal conductive fiber includes one or more of glass fiber, basalt fiber, and quartz fiber.

8. The woven heating fabric according to claim 4, characterized in that: The woven heating fabric further includes a PTC temperature control board electrically connected to the edge conductive warp yarn.

9. The woven heating fabric according to claim 4, characterized in that: The woven heating fabric also includes a lock-edge twisted warp yarn arranged on the edge of the woven heating fabric; the lock-edge twisted warp yarn is one or more of polyester staple yarn, acrylic staple yarn, vinylon staple yarn, chloroprene staple yarn, nylon staple yarn, polypropylene staple yarn, and aramid staple yarn.

Images