Conductive fabric for biaxial warp knitting vehicle
By using a biaxial warp-knitted fabric structure and employing two layers of conductive yarns arranged in parallel and bound together, the problems of easy yarn loosening and high cost in machine-woven SBR conductive fabrics are solved, achieving better curved surface fit and conductivity, and reducing material consumption.
Patent Information
- Application Number
- CN202511402750.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-28
- Publication Date
- 2025-12-05
AI Technical Summary
Existing automotive woven SBR conductive fabrics suffer from insufficient cohesion between warp and weft yarns, leading to easy yarn loosening. Furthermore, the high conductive content makes spinning difficult, reduces yarn strength, results in high costs, and makes it difficult to achieve good adhesion on curved surfaces.
It adopts a biaxial warp-knitted structure, with two layers of conductive yarns arranged in parallel and bound together by loops of fine denier chemical filaments. Combined with specific weaving structures such as two-needle warp plain or chain weaving structures, it reduces the density of conductive yarns and improves yarn utilization and fit.
It solves the problem of easy fiber detachment at the cut edge, enhances the ability to fit curved surfaces, reduces the amount of conductive yarn used and the cost, while maintaining good conductivity and softness.
Smart Images
Figure CN121065884A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of textiles, in particular to a conductive fabric for a biaxial warp knitting machine. BACKGROUND
[0002] The full name of SBR is Safety Belt Reminder, which is a kind of passive sensor in the seat belt reminder circuit system. It detects whether the passenger is seated through the pressure sensor installed in the seat. It is through the pressure of the human body sitting down to make the positive and negative poles of the detection circuit conductive, and inputs the information to the processor combined with the lock information of the safety belt insertion port to remind the passenger to check whether the safety belt is fastened.
[0003] The structure diagram of SBR pressure sensor is shown in Figure 1 The dark layer close to the inner layer of the upper and lower polyester film is the key conductive layer connected with the positive and negative poles of the power supply. The conductive layer of the inner layer of the film contacts the circuit under pressure and completes the signal detection of the human body (the object with weight is pressed down) sitting down. The most important thing in this sensor structure is the conductor of the inner layer of the upper and lower insulating film. This conductor has experienced three generations of development on the SBR sensor of the automobile seat.
[0004] The first generation is to coat the conductive silver paste on the insulating film. It has excellent conductivity, but the price is high and the coating has the risk of not being wear-resistant and falling off. Especially, silver belongs to heavy metal and has environmental pollution, which is not good for recycling. The second generation is to coat the conductive carbon-based paste on the insulating film. It has better conductivity and lower price. Carbon does not belong to heavy metal and has no environmental pollution, and does not need to be recycled. However, the coating also has the risk of not being wear-resistant and falling off.
[0005] The above two coating processes have low efficiency, complex process, high energy consumption and high cost. The third generation is a conductive fabric. It can also be a conductive cloth made by electroplating conductive metal materials on the surface of the fabric fiber after cleaning and activating the surface of the fabric. However, the plated metal is easy to be damaged, fall off and oxidize by impact and friction, so it is rarely used in automobiles.
[0006] Common SBR fabric for vehicles is generally made of carbon-based conductive materials into yarn and then into cloth. The conductivity of the yarn needs to be no more than 10 to the power of 8 ohms / cm, and the surface resistivity of the finished fabric itself is no more than 10 to the power of 5 ohms / cm. Most of the SBR fabrics on the market are polyester-based or polyamide-based carbon-based conductive filament woven conductive fabrics.
[0007] The existing woven SBR conductive fabric for vehicles generally uses 100D / 18-24F pure black polyester-based carbon graphene conductive yarn as warp and weft yarn by FDY process, and the node (upper and lower intersection points of warp and weft yarns) density of 1 / 4 twill fabric is relatively sparse, the holding force of warp and weft yarns in the fabric is relatively small, and the organization density is relatively loose, which leads to that some cut-off loose fibers are easily detached from the cut edge during subsequent composite cutting and forming processing, and are adhered to other objects, which has the risk of short-circuit mis-triggering signal. If plain weave or other more dense organization or larger warp and weft density is selected, the fabric stiffness will increase, and the subsequent ability to fit the curved surface will further decrease.
[0008] The warp and weft density of the woven conductive fabric is large, so that the fabric cannot be deformed and scattered, and thus the consumption of warp and weft conductive yarns is also large, and the cost of such conductive yarns is high (the domestic price is about 200-250 yuan / kg, and the imported price is about 800-1000 yuan / kg), for example, the warp and weft domestic raw material cost of a 110g / m2 black conductive fabric is about 23-27.5 yuan / m2. Therefore, although the unit area cost of the first / second generation conductive paste coating is lower, it is still very expensive compared with other civilian textiles.
[0009] In addition, the high content of conductive carbon powder and graphene in the fiber will cause spinning difficulty, and the conductive yarns spun will also have a significant decrease in strength due to the high content of conductive components, so the F number of polyester-based carbon graphene conductive yarns and nylon-based carbon conductive yarns is relatively small, the single filament is relatively thick, and the strength is relatively low. For heavy fabrics with large warp and weft density, the warp yarns are not conducive to reducing the end breakage rate and ensuring the quality under the large heald tension of the loom during weaving. SUMMARY
[0010] In view of the deficiencies of the prior art, the present application provides a double-axial warp-knitted conductive fabric for vehicles, which is a double-axial warp-knitted conductive fabric with two layers of parallel arranged conductive yarns, has high efficient utilization of conductive yarns, high degree of freedom in circuit design, and economy, and can obtain a more soft and smooth fabric appearance and better curved surface fitting degree.
[0011] To achieve the above object, the present application is implemented by the following technical solutions:
[0012] The application discloses a kind of biaxial warp-knitted car conductive fabric, the fabric is two layers of full-width weft insertion, full-width weft insertion, the full-width weft insertion of warp-knitted conductive yarn layer and the fine denier chemical filament connected with them is made of full-width weft insertion warp-knitted conductive fabric;And two layers of full-width weft insertion, full-width weft insertion, warp-knitted conductive yarn layer is connected with full-width weft insertion conductive yarn layer laid horizontally and full-width weft insertion conductive yarn layer laid vertically, the yarn loop of two conductive yarn layers is bundled fine denier filament, and the structure is two-needle warp plain or chain stitch, compared with traditional woven conductive fabric, better two layers of parallel laid warp and weft conductive yarn layer and smaller shedding and subsequent closer fitting with curved object, while the structure can more fully utilize the conductivity of conductive yarn and maximize their maximum stress capacity, and the fabric is more flexible than woven conductive fabric with the same weight.
[0013] Preferably, when the structure is two-needle warp plain, the warp plain disc is closed disc 10 / 12 or open warp plain disc 21 / 01;At the same time, whether it is one-beat or two-beat, the structure disc of the warp-knitted structure is 00 / 00.
[0014] Preferably, when the structure is chain stitch (such as 10 / 01 or 10 / 10), it is one-beat conductive yarn or two-beat conductive yarn in the same direction by inserting a stitch of conductive yarn or two stitches of conductive yarn in the same direction between chain stitch loop and extension line in the form of varying warp-knitted.
[0015] Preferably, when the one-beat conductive yarn is inserted, the structure disc is 00 / 11 or 11 / 00;When two-beat conductive yarn is inserted in the same direction, the structure disc is 00 / 11 and 00 / 11 or 11 / 00 and 11 / 00.
[0016] Preferably, the fine denier filament is any one of nylon 6, nylon 66, polyester filament FDY or DTY, and the denier is between 15D and 75D.
[0017] Preferably, the weft yarn and / or warp yarn in the conductive fabric is any one or more of short fiber yarn containing metal conductive fiber, conductive yarn with electroplated conductive layer outside filament, and organic composite carbon black type conductive filament.
[0018] Preferably, the organic composite carbon black type conductive filament is nylon 6 based organic composite carbon black graphene filament FDY yarn, and the specification range is 20D to 100D, and the F number is 3-36F.
[0019] The fabric is applied to prepare a vehicle safety warning device.
[0020] The application provides a kind of biaxial warp-knitted car conductive fabric, compared with prior art, the advantages are as follows:
[0021] (1) The fabric of the present application can solve the problem of easy fiber shedding at the cutting edge: The present application designs a two-layer paving method in which the conductive warp and weft yarns are respectively parallel and closely arranged, and another kind of fine denier chemical synthetic fiber filament bundles the parallel and layered warp and weft yarns together locally by a loop, so that the conductive fibers in the conductive yarns will not be cut off and scattered out because of the existence of the fine denier binding loop at the subsequent cutting edge. This organization is applied to two special biaxial warp-knitted conductive fabrics;
[0022] (2) The fabric of the present application can solve the problem of poor fit of heavy-duty woven conductive cloth to irregular curved surfaces during subsequent use: Knitted organization is loop organization, which has high fit degree to four-way and any curved surface deformation. The single yarn of the parallel paving weft yarn layer is convenient to extend to the axial ends along the stress point under stress; the single yarn of the parallel paving warp yarn layer is also convenient to extend to the axial ends along the stress point under stress. Although they are stacked and connected into cloth by fine denier flexible binding yarn, the conductive yarn density is lower than that in heavy-duty conductive woven cloth, which leads to the fact that the biaxial warp-knitted conductive cloth designed in the present application has stronger fit ability to curved surfaces;
[0023] (3) The fabric of this invention exhibits better strength and conductivity utilization of the conductive yarns: In traditional woven conductive fabrics, the breaking strength of the warp and weft conductive yarns is lower than that of ordinary matrix material yarns. For example, the breaking strength of polyester-based FDY 100D / 18F yarn does not exceed 2.8-3 cN / dtex, while the breaking strength of ordinary polyester FDY 100D exceeds 4.4 cN / dtex; the breaking strength of nylon 6-based FDY 20D / 3F carbon-based graphene conductive yarn is generally only 2.2 cN / dtex, while the breaking strength of ordinary nylon 6 FDY 20D is as high as 3.8-4 cN / dtex. Therefore, traditional woven conductive fabrics are at risk of fiber breakage and circuit damage under subsequent high tensile stress conditions. In terms of utilizing the mechanical properties of yarns, biaxial warp knitting is the optimal stress-bearing structure. Therefore, it doesn't require as many conductive yarns to bear the stress, reducing the density of the conductive yarns. While the density of conductive warp and weft yarns in the biaxial warp-knitted conductive fabric of this invention is not as high as that of woven conductive fabric, it can utilize nylon 6-based FDY 20D / 3F conductive fiber ply yarn with better conductivity. Its yarn resistivity is at least an order of magnitude lower than that of polyester-based carbon-based graphene conductive yarn of the same thickness, essentially reaching 2 x 10⁶ ohms / cm. The resistivity of the ply yarn in 80D / 12F yarn can even reach 4-5 x 10⁵ ohms / cm. Therefore, it ensures that the conductivity requirements can be met even with a lower warp and weft yarn density. Meanwhile, after the biaxial warp-knitted conductive fabric is set, it requires a high-temperature flat pressing process. This process helps to more rationally arrange the conductive fibers in the warp and weft yarns in parallel on a single plane, increasing the tightness of contact between fibers across the entire conductive plane, thereby improving its surface conductivity (and reducing surface resistivity). Lower consumption of expensive conductive yarn per unit area also means lower raw material costs for the product. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the SBR pressure sensor structure.
[0025] Figure 2 This is a diagram of the biaxial warp-knitted conductive fabric with a two-needle warp plain weave in Embodiment 1 of the present invention.
[0026] Figure 3 This is a diagram of the biaxial warp-knitted conductive fabric with a chain-knit structure in Embodiment 2 of the present invention; Detailed Implementation
[0027] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort belong to the scope of protection of the present application.
[0028] Embodiment 1
[0029] As Figure 1 The full-width weft-inserted two-beam weft-insertion comb section double-axial warp-knitted conductive fabric is shown in the structure:
[0030] 1. Selection of warp and weft yarn raw materials
[0031] The conductive yarn is selected from nylon 6-based FDY 20D / 3F carbon-based graphene conductive filament produced by Jiangshan Hongtesheng Special Chemical Fiber Co., Ltd. The breaking strength value is in the range of 2.2-2.3 cN / dtex, and the resistivity is in the range of 1.8-2 x 10-6 ohm / cm. Since this nylon 6-based carbon-based graphene conductive yarn is too thin and has low strength, it needs to be combined into one yarn by combining four nylon 6 FDY 20D / 3F conductive yarns, which can be done on a network doubling and twisting machine.
[0032] As a fine denier binding filament for connecting and binding warp and weft conductive yarns, in order to facilitate the melting point of each material to be consistent when ultrasonic welding with metal electrode wire in the subsequent process, this embodiment selects nylon 6 FDY 30D / 12F, which has sufficient toughness during knitting.
[0033] 2. Selection of machine type
[0034] A 186-inch wide German Karl Mayer 24-gauge RS three-comb warp knitting machine is selected, and three widths are opened: 186 x 2.54 = 3 x 157.48 cm. The conductive fabric door width is 143-144 cm.
[0035] 3. Grey fabric process
[0036] Machine door width: 186 inches open three widths = 23 widths x 157.48 cm, each with 9 496-line disc heads.
[0037] GB1: warp flat binding disc 21 / 01 full wear PA6 FDY 30D / 12F warp feed amount about 900 mm / rack;
[0038] GB2: weft-insertion disc 00 / 00 full wear PA6 black conductive yarn FDY 80D / 12F warp feed amount about 133 mm / rack;
[0039] GB3: Lining warp disc 00 / 00 full PA6 black conductive yarn FDY 80D / 12F warp feed amount about 133 mm / rack;
[0040] Weft: PA6 black conductive yarn 80D / 12F;
[0041] The on-machine weft density is 36 roots / cm.
[0042] 4. Post-processing process and key parameters
[0043] Blank - refining - setting - calendering - composite insulation film - sampling test - cloth inspection packaging - warehousing;
[0044] The water washing process can be selected as a long car flat washing refiner, and the water temperature is in the range of 85-94℃, the purpose is to make the blank yarn (fiber) relaxation shrinkage to remove the residual internal stress and oil and dirt on the surface of the yarn during the spinning and weaving process. Prepare for the subsequent setting of the blank. This process can also be carried out in an overflow dyeing cylinder, which has better refining and pre-shrinking relaxation effect, but the flatness of the cloth is not as good as the long car flat refining, and the water and energy consumption is larger, and the process cost is slightly higher. After refining, the blank width is reduced to about 146 cm.
[0045] Setting temperature 175-180℃, after setting the width is 143-144cm. Off-machine warp and weft density: 3x10.4x40 roots / cm Setting yield is about 90%. Square gram weight is 86±2g / m 2 . Among them, the conductive yarn content is 69.66%, and the binding yarn content is 30.34%.
[0046] The calendering machine is selected as a large pressing machine 155-160 degrees for bonding.
[0047] The resistivity of the cloth after calendering is 2.5-3.0x10's fourth power ohm / cm. The breaking strength of 5cm wide in warp / weft direction is >200N / 450N. The tear strength in the transverse direction is >78N. Cloth thickness is 0.19mm.
[0048] From the test data, it can be seen that the two-axial warp-knitted conductive fabric 80DX 80D X30D X 80D has good mechanical properties, excellent conductive performance and economic performance, and the cloth is smooth, thin and well fitted.
[0049] Example 2:
[0050] The preparation of full-width lining weft two-comb direction-changing lining warp-knitted conductive fabric as shown in the organization: Figure 2
[0051] 1. Selection of warp and weft raw materials:
[0052] The conductive yarn is selected from nylon 6-based FDY 20D / 3F carbon-based graphene conductive filament produced by Jiangshan Hongtesheng Special Chemical Fiber Co., Ltd. The breaking strength value is in the range of 2.2-2.3 cN / dtex, and the resistivity is in the range of 1.8-2 x 10-6 ohm / cm. Since the nylon 6-based carbon-based graphene conductive yarn is too thin and the strength is not high, 4 nylon 6 FDY 20D / 3F conductive yarns are stranded into one yarn for use. Stranding can be carried out on a network doubling machine.
[0053] As a fine denier binding filament connecting the warp and weft conductive yarns, in order to facilitate the melting point of each material to be consistent when ultrasonic welding with the metal electrode wire, this embodiment selects nylon 6 FDY 30D / 12F, which has sufficient toughness when weaving.
[0054] 2. Machine selection
[0055] A 186-inch width German Karl Mayer 24 needle type RS three-needle warp knitting machine is selected, and three widths are opened: 186x2.54 = 3x157.48 cm. The door width of the conductive fabric is 143-144 cm.
[0056] 3: Fabric process
[0057] Machine door width: 186 inches open three widths = 23 widths x 157.48 cm, each 9 496 line disc head.
[0058] GB1: chain binding flower disc 10 / 10 full wear PA6 FDY 30D / 12F, warp feed amount about 820 mm / rack;
[0059] GB2: change back warp flower disc 00 / 11 full wear PA6 black conductive yarn FDY 80D / 12F, warp feed amount about 136 mm / rack;
[0060] GB3: change back warp flower disc 00 / 11 full wear PA6 black conductive yarn FDY 80D / 12F, warp feed amount about 136 mm / rack;
[0061] Weft: PA6 black conductive yarn 80D / 12F;
[0062] The weft density on the machine is 36 roots / cm.
[0063] 4: Post-finishing process and key parameters
[0064] Fabric - refining - setting - calendering - composite insulation film - sampling test - cloth inspection and packaging - warehousing;
[0065] The water washing process can be selected long car flat water washing refiner, water temperature in the range of 85-94℃, the purpose is to let the gray fabric yarn (fiber) relaxation shrink to remove the residual internal stress and yarn surface oil and dirt in the process of spinning and weaving. To make good preparation for the subsequent setting of gray fabric. This process can also be carried out in overflow dyeing cylinder, its refining pre-shrinking relaxation effect is better, but the flatness of the cloth is not as good as long car flat refining, and the water and energy consumption is larger, the process cost is slightly higher. After refining, the gray fabric width is reduced to about 148 cm.
[0066] Setting temperature 175-180℃, after setting the width of 143-144cm. The weft and warp density after setting: 3x10.4x41 root / cm, setting product rate is about 88%. The square gram weight is 86±2g / m 2 . Among them, the content of conductive yarn is 71.7%, and the content of binding yarn is 28.3%.
[0067] The calender is selected as a large pressing machine 155-160 degrees for bonding.
[0068] The resistivity of the cloth after calendering is 2.0-2.2x10's power ohm / cm. The breaking strength of warp / weft direction 5cm wide is >170N / 450N. The tear strength in the transverse direction is >60N. The cloth thickness is 0.2mm.
[0069] Through the test data, it can be seen that the full-width weft change of the two-beat comb section of the lining has good mechanical properties, excellent conductive performance and economic performance. The warp yarn binding loops are not connected to each other, and the lining warp is located in the loop, so it has better warp softness. The cloth is thin, soft and slightly elastic, and is more easy to fit the special-shaped curved surface. Moreover, the lining warp is inserted into the chain loop and is fixed, so it is not easy to slip and displace with the weft conductive layer.
[0070] Comparative example 1:
[0071] Traditional woven twill conductive cloth:
[0072] 1. Selection of warp and weft yarn raw materials:
[0073] The conductive yarn is selected as a single nylon 6-based FDY 80D / 12F carbon-based graphene conductive filament imported from Japan, with a breaking strength value of 2.2-2.3 cN / dtex and a resistivity of 5x10's power ohm / cm. Its unit price is about 850 yuan / kg.
[0074] 2. Gray fabric process:
[0075] A heavy water jet loom is selected, and a 1 / 4 standard twill weave is selected. The machine width is 175 cm, and the machine weft and warp density is 46x46 root / cm.
[0076] 3. Finishing process and key parameters
[0077] Fabric - refining - setting - calendering - composite insulation film - sampling test - fabric inspection and packaging - warehousing;
[0078] The water washing process can be selected as a long car flat water washing refiner, and the water temperature is in the range of 85-94°C, the purpose is to make the fabric yarn (fiber) relaxation shrinkage to remove the residual internal stress and oil and dirt on the surface of the yarn during spinning and weaving process. Prepare for subsequent setting of the fabric. This process can also be carried out in an overflow dyeing vat, which has better refining and pre-shrinking relaxation effect, but the flatness of the fabric is not as good as that of the long car flat refining, and the water and energy consumption is larger, and the process cost is slightly higher. After refining, the fabric width is reduced to about 148 cm.
[0079] Setting temperature 175-180°C, fabric width after setting 152-153 cm. Weft and warp density after setting: 53x53 roots / cm Setting yield 86.8% or so. Square gram weight 108.8±2g / m 2 . Among them, the conductive yarn content is 100%.
[0080] The calender can be selected as a large flat pressing machine 155-160 degrees for bonding.
[0081] The resistivity of the fabric after calendering is 1.8-2.0x10's 4 ohm / cm. The breaking strength of 5 cm wide warp and weft is >450N / 450N. The transverse tear strength is >30N. The fabric thickness is 0.27mm, and the hand feeling is relatively stiff.
[0082] From the test data, it can be seen that the transverse tear mechanical properties of the above fabric are worse than those of Example 2, but have excellent conductive properties, and the overall economic performance is poor. And it is not easy to stick to the curved surface object, especially when cutting, the edge of the conductive fiber is easy to come off, which has the risk of circuit malfunction.
[0083] Comparative Example 2:
[0084] Full-width weft insertion two-cloth section cross change weft insertion chain weft conductive fabric.
[0085] 1. Selection of warp and weft yarn raw materials:
[0086] The conductive yarn is selected from nylon 6-based FDY 20D / 3F carbon-based graphene conductive filament produced by Jiangshan Hong Special Chemical Fiber Co., Ltd. The breaking strength is in the range of 2.2-2.3 cN / dtex, and the resistivity is in the range of 1.8-2x10's 6 ohm / cm. Because this nylon 6-based carbon-based graphene conductive yarn is too thin and has low strength, it needs to be combined into one yarn by combining 4 nylon 6 FDY 20D / 3F conductive yarns. The combining can be carried out on a parallel network double twisting machine.
[0087] As the connecting bundle of long and short conductive yarns, in order to facilitate the subsequent ultrasonic welding of metal electrode wire, the melting point of each material is consistent, and in this embodiment, we choose nylon 6FDY30D / 12F, which has enough toughness when weaving.
[0088] 2. Model selection
[0089] Select 186-inch width German Karl Mayer 24-gauge RS three-needle warp knitting machine, open three widths: 186x2.54=3x157.48cm. The door width of the conductive fabric is 143-144cm.
[0090] 3: Gray process
[0091] Machine door width: 186 inches open three widths=23 widths x 157.48cm, each 9 496 line disc head.
[0092] GB1: chain binding disc 10 / 10 full PA6 FDY 30D / 12F warp feed amount about 820mm / rack;
[0093] GB2: change back disc 11 / 00 full PA6 black conductive yarn FDY 80D / 12F warp feed amount about 136mm / rack;
[0094] GB3: change back disc 00 / 11 full PA6 black conductive yarn FDY 80D / 12F warp feed amount about 136mm / rack;
[0095] Weft: PA6 black conductive yarn 80D / 12F;
[0096] The weft density on the machine is 36 roots / cm.
[0097] 4. Post-processing process and key parameters
[0098] Gray fabric-refining-setting-pressing-composite insulation film-sampling test-inspecting and packaging-warehousing;
[0099] The water washing process can be selected long car flat washing refiner, water temperature in the range of 85-94℃, the purpose is to let the gray fabric yarn(fiber) relaxation shrinkage to remove the residual internal stress and oil and dirt on the surface of the yarn during spinning and weaving. Prepare for the subsequent setting of the gray fabric. This process can also be carried out in an overflow dyeing cylinder, which has better refining and pre-shrinking relaxation effect, but the flatness of the fabric is not as good as that of the long car flat refining, and the water and energy consumption is larger, the process cost is slightly higher. After refining, the gray fabric door width is reduced to about 148cm.
[0100] Setting temperature 175-180℃, door width after setting 143-144cm. Off-machine warp and weft density: 3x10.4x41 roots / cm, setting yield about 88%. Square gram weight 86±2g / m2 The content of the conductive yarn is 71.7%, and the content of the binding yarn is 28.3%.
[0101] The calender can be a large pressing machine 155-160 degrees for bonding.
[0102] The resistivity of the fabric after calendering is 2.2-2.4x10-4 ohm / cm. The breaking strength of the warp and weft is >190N / 465N. The tear strength in the cross direction is >70N. The fabric thickness is 0.22mm, and the fabric surface flatness is slightly poor.
[0103] It can be seen from the test data that the full-width weft change of the cross-lining two-beam section of the warp-knitted conductive fabric 80D X 80D X 30D X 80D has good mechanical properties, but the conductive performance and the fitting curve effect are worse than those of the same-direction lining two-beam section of the warp-knitted conductive fabric of Example 2. Moreover, the warp softness and flatness are slightly worse than those of the sample of Example 2, and the product wear resistance is also reduced because of the local overlap of the two lining warp conductive yarns.
[0104] The above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A dual-axial, electrically conductive fabric for use in a vehicle seat, characterized in that, The fabric is a full-width weft-inserted warp-knitted conductive fabric formed by two layers of full-width weft-inserted, warp-inserted conductive yarns and fine denier chemical filaments connected thereto; The two layers of full-width weft-inserted, warp-inserted conductive yarns are connected to a full-width weft-inserted conductive yarn layer laid horizontally and a warp-inserted conductive yarn layer laid vertically, and the loops of the two conductive yarn layers are bundled with fine denier filaments, and the structure is two-needle flat knitting or chain stitch.
2. The fabric of claim 1, wherein: When the structure is two-needle flat knitting, the flat knitting disc is closed disc 10 / 12 or open flat knitting disc 21 / 01; at the same time, whether the warp-inserted structure is one-beat or two-beat, the structure disc is 00 / 00.
3. The fabric of claim 1, wherein: When the structure is chain stitch, one-beat conductive yarn or two-beat conductive yarn is inserted in the chain stitch and the extension line in the form of changing warp-insertion.
4. The fabric of claim 3, wherein: When one-beat conductive yarn is inserted, the structure disc is 00 / 11 or 11 / 00; when two-beat conductive yarn is inserted, the structure disc is 00 / 11 and 00 / 11 or 11 / 00 and 11 / 00.
5. The fabric of claim 1, wherein: The fine denier filaments are any one of nylon 6, nylon 66, polyester filament FDY or DTY, and the denier is between 15D and 75D.
6. The fabric of claim 1, wherein: The weft yarn and / or warp yarn in the conductive fabric is any one or more of short yarn containing metal conductive fiber, conductive yarn with electroplated conductive layer on the outside of the filament, and organic composite carbon black conductive filament.
7. The fabric of claim 6, wherein: The organic composite carbon black conductive filament is nylon 6-based organic composite carbon black graphene filament FDY yarn, and its specification range is 20D to 100D, and the F number is 3-36F.
8. Use of the fabric according to any one of claims 1-7 in the preparation of a safety reminder device for a vehicle.