TPE novel thermoplastic rubber flexible cable

Abstract

A TPE novel thermoplastic rubber flexible cable disclosed by the present invention comprises a tensile conductor, an insulation shielding sleeve and an outer sleeve, the outer sleeve is internally provided with a buffer filling layer and a tear-resistant belt, a high temperature resistant layer is arranged between the outer sleeve and the insulation shielding sleeve, and the high temperature resistant layer is composed of a polyimide nanofiber woven belt and an outer sleeve layer. The polyimide nanofiber woven belt and the outer sleeve layer successively sleeve the outer layer of the tensile conductor, so that instantaneous high temperature can be blocked, and the temperature resistance of the tensile conductor is enhanced. The hBN / TPE composite material is adopted, the temperature resistance limit is broken through, the cable can resist the temperature from 130 DEG C to 150 DEG C, the heat resistance limit of the cable is improved, and thermal aging is relieved; high tear resistance is achieved through dynamic crosslinking of SEBS / TPU, the tear strength is larger than or equal to 25 kN / m, and the mechanical performance is improved through cooperation of the tear-resistant layer of the bionic three-dimensional woven structure and the gradient buffer filling layer; and the bending life, the tensile strength and the temperature resistance of the cable are superior to those of a traditional TPE cable, and international standards such as IEC, UL and ISO are met.

Description

TECHNICAL FIELD

[0001] The present application relates to a cable device, in particular a new type of TPE thermoplastic rubber flexible cable, belonging to the technical field of TPE cables. BACKGROUND

[0002] Flexible cable generally refers to a kind of soft and flexible cable, which is widely used in mobile devices, mechanical equipment, industrial applications and other occasions requiring frequent movement. The design purpose of such cable is to maintain reliable electrical connection during movement while being able to withstand bending, stretching and other stresses. Flexible cables are usually made of soft materials such as rubber or special plastics, which have good bending and twisting properties, allowing the cable to adapt to various complex movement conditions.

[0003] According to the search, Chinese patent No. CN219610048U discloses a TPE cable. By arranging an insulation layer in the cable of the conductor layer, the insulation performance of the circuit can be enhanced again. At the same time, a protective layer composed of a buffer layer and an anti-corrosion layer is arranged to enhance the flexibility and bending degree of the cable. The sheath made of TPE material can enhance the protection performance while improving the plasticity of the circuit. However, the above-mentioned patent product is marked as applicable at a temperature of 125℃. However, TPE material may have a risk of thermal aging, such as decreased elasticity and material brittleness, if used in an environment close to its heat resistance limit (usually TPE long-term use temperature ≤100-120℃) for a long time. SUMMARY

[0004] The purpose of the present application is to provide a new type of TPE thermoplastic rubber flexible cable to solve the above problems.

[0005] The present application achieves the above-mentioned purpose by the following technical solution. The TPE new type of thermoplastic rubber flexible cable comprises a tensile conductor, an insulation shielding sleeve and an outer sleeve. The outer sleeve is internally provided with a buffer filling layer and a tear-resistant band. A high-temperature resistant layer is arranged between the inner part of the outer sleeve and the insulation shielding sleeve. The high-temperature resistant layer is composed of a polyimide nanofiber woven band and an outer sleeve layer. The polyimide nanofiber woven band and the outer sleeve layer are successively sleeved on the outer layer of the tensile conductor, which can block instantaneous high temperature and enhance the temperature resistance of the tensile conductor.

[0006] The tensile conductor is composed of two parts, a tensile core in the middle and oxygen-free copper wires on the outer side of the tensile core, which together form a composite core to bear mechanical load and avoid fatigue fracture of the copper wires during cable use.

[0007] A multifunctional protection assembly is arranged on the outer sleeve, which is composed of an inner lining layer, an intermediate layer, an outer layer and a surface layer. The layered protection enhances the chemical corrosion resistance and tear resistance of the cable, and realizes the functions of flame retardation and environmental protection.

[0008] Preferably, the oxygen-free copper wire is ultra-fine oxygen-free copper wire, the diameter of the oxygen-free copper wire is 0.08-0.12 mm, the oxygen-free copper wire adopts an asymmetric spiral twisting design, the inner layer twisting pitch is 8-10 times the diameter of the copper wire, and the outer layer twisting pitch is 12-15 times, so that the bending stress concentration can be reduced in the use of the cable.

[0009] Preferably, the insulation shielding sleeve adopts a double shielding structure to realize broadband electromagnetic shielding of the cable.

[0010] Preferably, the high-temperature-resistant layer and the buffer filling layer are both provided in a double-layer structure, so that the TPE thermal stability is enhanced, and shrinkage in overheating is compensated for the sheath creep deformation.

[0011] Preferably, the multifunctional protection assembly is a four-layer co-extrusion structure, and the four-layer co-extrusion structure is, in sequence, fluorinated TPE, dynamic cross-linking SEBS / TPU blend, halogen-free flame-retardant TPE and bio-based TPE.

[0012] Preferably, the insulation shielding sleeve comprises, from the inside to the outside, a silver-plated copper wire braid layer and a graphene conductive coating layer.

[0013] Preferably, the fluorinated TPE is 85% TPE matrix + 10% polyphenylene sulfide + 5% boron nitride, and the dynamic cross-linking SEBS / TPU is 70% SEBS + 25% TPU + 5% dynamic disulfide bond cross-linking agent.

[0014] Preferably, the anti-tearing layer is a three-dimensional bionic woven structure, and the key node position is locally reinforced by TPU / carbon fiber composite material.

[0015] The above-mentioned TPE novel thermoplastic rubber flexible cable comprises the following process steps:

[0016] S1: conductor twisting and anti-tension core synchronous forming;

[0017] S2: polyimide nanofiber braid and hBN / TPE co-extrusion into a high-temperature-resistant layer;

[0018] S3: the buffer filling layer adopts supercritical CO2 foaming technology;

[0019] S4: four-layer sheath co-extrusion.

[0020] The present application has the following beneficial effects:

[0021] 1. The insulation shielding sleeve adopts hBN / TPE composite material, breaks through the temperature resistance limit, can resist temperature of 130 DEG C to 150 DEG C, improves the heat resistance limit of the cable, and relieves thermal aging;

[0022] 2. Dynamic cross-linking SEBS / TPU in multifunctional protective assembly realizes high tear resistance, tear strength ≥ 25 kN / m, and the tear-resistant layer of bionic three-dimensional woven structure and the gradient buffer filling layer synergistically improve the mechanical properties;

[0023] 3. Performance improvement, better than traditional TPE cable in bending life, tensile strength, temperature resistance, meets international standards such as IEC, UL, ISO, etc. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The overall structure of the TPE new thermoplastic rubber flexible cable is shown in the figure.

[0025] Figure 2 The structure of the TPE new thermoplastic rubber flexible cable is shown in the figure.

[0026] Figure 3 The structure of the TPE new thermoplastic rubber flexible cable is shown in the figure.

[0027] Figure 4 The structure of the TPE new thermoplastic rubber flexible cable is shown in the figure.

[0028] Figure 5 The structure of the TPE new thermoplastic rubber flexible cable is shown in the figure.

[0029] In the figure: 1, oxygen-free copper wire; 101, tensile core; 2, insulating shielding sleeve; 201, silver-plated copper wire braid layer; 202, graphene conductive coating; 205, silver-plated copper wire braid layer; 206, graphene conductive coating; 3, buffer filling layer; 4, tear-resistant layer; 5, multifunctional protective assembly; 501, inner lining layer; 502, middle layer; 503, outer layer; 504, surface layer; 6, high temperature resistant layer; 601, polyimide nanofiber woven belt; 602, outer sleeve. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all.

[0031] Example 1:

[0032] Reference Figures 1-5The utility model relates to a new type of thermoplastic elastomer (TPE) soft cable, which comprises a tensile conductor, an insulating shielding sleeve 2 and an outer sleeve, wherein a buffer filling layer 3 and a tear-resistant layer 4 are arranged inside the outer sleeve, a high-temperature-resistant layer 6 is arranged between the insulating shielding sleeve 2 and the outer sleeve, the high-temperature-resistant layer 6 is composed of a polyimide nanofiber woven belt 601 and an outer sleeve layer 602, the outer sleeve layer 602 is a boron nitride (hBN) modified TPE, the polyimide nanofiber woven belt 601 and an electromagnetic shielding layer 204 are successively arranged outside the tensile conductor, and the soft cable can block instantaneous high temperature and enhance the temperature resistance of the tensile conductor.

[0033] The tensile conductor is composed of two parts, a tensile core 101 in the middle and an oxygen-free copper wire 1 arranged outside the tensile core 101, which together form a composite core to bear mechanical load and avoid fatigue fracture of the copper wire during use of the cable.

[0034] A multifunctional protection assembly 5 is arranged on the outer sleeve, which is composed of an inner lining layer 501, an intermediate layer 502, an outer layer 503 and a surface layer 504, and can provide layered protection, enhance the chemical corrosion resistance and tear resistance of the cable, and realize the functions of flame retardation and environmental protection.

[0035] The oxygen-free copper wire 1 is an ultra-fine oxygen-free copper wire, and the diameter of the oxygen-free copper wire 1 is 0.08-0.12 mm. The oxygen-free copper wire is designed by asymmetric spiral twisting, the inner layer twisting pitch is 8-10 times the diameter of the copper wire, and the outer layer twisting pitch is 12-15 times. The electromagnetic shielding layer 204 adopts a double shielding structure to realize wideband electromagnetic shielding of the cable.

[0036] In the embodiment, it should be noted that Figures 1-2 and Figure 5 The tensile core 101 is a composite core of aramid fiber and carbon fiber (mass ratio 6:4), the diameter is 0.5-1.2 mm, the tensile strength is greater than or equal to 500 MPa, and the interface is enhanced by epoxy resin impregnation and curing. The asymmetric twisted copper wire optimizes the stress distribution, and the bending life is improved to 15 million times (IEC602271). The composite core composed of the oxygen-free copper wire 1 and the tensile core 101 can bear 90% of the mechanical load, and avoid fatigue fracture of the copper wire.

[0037] The base body of the buffer filling layer 3 is a gradient foaming TPE, the foaming rate of the inner layer is 30% (pore diameter 50 μm), the foaming rate of the outer layer is 70% (pore diameter 200 μm), and the density is 0.6-1.0 g / cm 3 A network of shape memory alloy (SMA, NiTi alloy) micro wires with a diameter of 0.1 mm and a phase transition temperature of 80-100 ℃ is arranged in the buffer filling layer 3 to enhance the shape memory effect.

[0038] The gradient foaming structure can absorb vibration energy of different frequencies, and the damping coefficient is greater than or equal to 0.3. When overheated, the SMA shrinks to compensate for the creep deformation of the protective sleeve, and the recovery rate is greater than or equal to 95%.

[0039] The anti-tear layer 4 is a three-dimensional bionic woven structure, the warp aramid fiber has a linear density of 1680D, the weft UHMWPE fiber has a linear density of 440D, and the weaving density is 80-120 roots / inch.

[0040] On the basis of the three-dimensional bionic woven structure, local reinforcement is performed, TPU / carbon fiber composite material (carbon fiber volume fraction 30%) is used to cut 5mm*5mm reinforcing patches by laser, and the reinforcing patches are pasted on the bending stress concentration area.

[0041] The anti-tear layer 4 of the three-dimensional bionic woven structure has a tensile strength of greater than or equal to 250MPa, the wear resistance is increased by 3 times (Taber test, CS10 rounds, 1kg load), and the local reinforcing patches reduce the stress peak value of the bending area by 40%.

[0042] Example two:

[0043] Different from example one, referring to Figures 1-5 , the embodiment further has the following further contents: the high-temperature-resistant layer 6 and the buffer filling layer 3 are both double-layered, which enhances the thermal stability of TPE and shrinks when overheating to compensate for the creep deformation of the sheath.

[0044] The multifunctional protection assembly 5 is a four-layer co-extrusion structure, which is fluorinated TPE, dynamically cross-linked SEBS / TPU blend, halogen-free flame-retardant TPE and bio-based TPE in turn. The fluorinated TPE is 85% TPE matrix + 10% polyphenylene sulfide + 5% boron nitride, and the dynamically cross-linked SEBS / TPU is 70% SEBS + 25% TPU + 5% dynamic disulfide cross-linking agent.

[0045] The insulating shielding sleeve 2 has a silver-plated copper wire braided layer 201 and a graphene conductive coating 202 from the inside to the outside.

[0046] The anti-tear layer 4 is a three-dimensional bionic woven structure, and the key node position is locally reinforced by TPU / carbon fiber composite material.

[0047] In this embodiment, it should be noted that the polyimide (PI) nanofiber woven belt 202 in the inner layer of the high-temperature-resistant layer has a single fiber diameter of 50-100nm, a weaving density of 80-120 roots / cm 2 , and a temperature resistance of 300℃; the outer layer 203 is hBN modified TPE, the mass fraction of hBN is 5%-10%, the particle size is 50-200nm, and the dispersion is performed by a double-screw extruder.

[0048] The PI nanofiber layer can block instantaneous high temperature (such as short circuit impact), and the thermal conductivity is increased to 1.2W / (m·K); the hBN enhanced TPE has thermal stability, and the long-term use temperature reaches 130℃.

[0049] The electromagnetic shielding layer 204 is double-layer designed, the inner layer is silver-plated copper wire 201 (silver layer thickness 2-5 μm) braiding coverage reaching 90%, braiding angle being 45°, and the outer shielding layer is graphene (mass ratio 1:1) conductive coating 202, coating thickness being 10-20 μm, surface resistance ≤1 Ω / sq.

[0050] The double shielding structure realizes wide-band electromagnetic shielding (30 MHz-6 GHz, shielding effectiveness ≥80 dB), the graphene coating reduces the skin effect, and the high-frequency signal loss is reduced by 30%.

[0051] The inner lining layer 501 of the multifunctional protection assembly 5 is fluorinated TPE (fluorine content 8%-12%), thickness 0.2-0.3 mm, resistant to ASTM 3 oil (70°C×168 h volume expansion rate ≤3%); the middle layer 502 is dynamic crosslinking SEBS / TPU (SEBS 70%, TPU 25%, disulfide bond crosslinking agent 5%), thickness 0.5-0.8 mm, tear strength ≥25 kN / m; the outer layer 503 is halogen-free flame-retardant TPE (phosphorus-nitrogen flame retardant 20%, nano clay 5%), thickness 0.5-1.0 mm, passing UL94 V0 (1.6 mm sample); and the surface layer 504 is bio-based TPE (castor oil derivative content ≥30%), thickness 0.1-0.2 mm, meeting ISO 10993 biocompatibility.

[0052] The multi-layer design can realize layered protection, namely chemical corrosion resistance → tear resistance → flame retardation → environmental protection.

[0053] Example Three:

[0054] With reference to Figures 1-5 Compared with example one and example two, in the present example, the TPE novel thermoplastic rubber soft cable comprises the following process steps:

[0055] S1: conductor stranding and tensile core synchronous forming;

[0056] S2: polyimide nanofiber braiding tape and hBN / TPE co-extrusion into high-temperature resistant layer;

[0057] S3: supercritical CO2 foaming technology is used for buffer filling layer;

[0058] S4: four-layer sheath co-extrusion.

[0059] In the present example, it needs to be explained that:

[0060] S1, conductor stranding and tensile core forming are through high-speed stranding machine (speed 3000-5000 rpm) + fiber impregnation tank.

[0061] 1. Copper wire through tension controller (tension 5 ± 0.5N) into the stranding machine, according to the asymmetric pitch layered stranding.

[0062] 2. Aramid / carbon fiber bundle through epoxy resin impregnation tank (resin solid content 60%), 120℃ drying and curing.

[0063] 3. Copper wire stranding body and tensile core synchronous traction, through laser alignment to ensure coaxiality deviation ≤0.1mm.

[0064] S2, the insulation shielding sleeve 2 composed of the silver-plated copper wire braided layer 201 and the graphene conductive coating insulation layer 202 is co-extruded by a double screw extruder (L / D=40)+PI fiber braiding machine.

[0065] 1. PI nanofiber is braided into a belt on the surface of the conductor, and the braiding speed is 2-5 m / min.

[0066] 2. hBN / TPE particles are melt-extruded by a double screw (temperature 190-210℃) to coat a PI layer, and the thickness is controlled to be ±0.02mm.

[0067] 3. Water cooling and shaping (water temperature 20±2℃), and the traction speed is matched with the extrusion rate.

[0068] S3, electromagnetic shielding layer 204

[0069] First, the silver-plated copper wire is braided to form a silver-plated copper wire braided layer 201, the braiding machine spindle number is 48, the mesh number is 80-100 meshes, and the coverage rate is ≥90%.

[0070] Then, the graphene conductive coating 202 is sprayed outside the silver-plated copper wire braided layer 201, the spraying chamber temperature is 50℃, the relative humidity is ≤30%, and the curing is carried out at 150℃ for 3min.

[0071] S4, buffer filling layer 3 forming

[0072] The TPE granules and SMA microfilaments are premixed by using a supercritical CO2 foaming device (pressure 0-30MPa), a foaming agent (0.5%-1% azodicarbonamide) is added, supercritical CO2 (pressure 15-25MPa, temperature 160℃) is injected into the extruder, pressure is maintained for 10-15min, and finally the pressure is released in stages: the inner layer is quickly released (rate 5MPa / s) to form dense bubbles, and the outer layer is slowly released (1MPa / s) to form sparse bubbles.

[0073] S5, the anti-tearing layer 4 is braided by a machine with aramid and UHMWPE fibers at 90° in the warp and weft directions, the machine path planning ensures that the density of the key area is +20%, and the local reinforcing sheet is activated by infrared heating (120℃) to activate the TPU adhesive layer, and the pressure is 0.5MPa for 10s.

[0074] S6, four-layer co-extrusion of multifunctional protective component 5

[0075]

[0076] Cooling: segmented water cooling (first segment 50°C -> second segment 25°C) to avoid interlayer peeling.

[0077] Example Four:

[0078] Through precise structural design and process control, this scheme realizes the comprehensive performance improvement of high temperature resistance, high toughness, and intelligence on the basis of maintaining the recyclable characteristics of TPE. The synergistic effect of each layer solves the inherent defects of traditional TPE cables, providing an ideal cable solution for Industry 4.0 and green manufacturing.

[0079] The following are performance verification and test standards:

[0080]

[0081] Example Five:

[0082] Applied to high-frequency bending (≥5 times / second), oil pollution environment (automobile manufacturing welding robot) industrial robot joint cable.

[0083] Structural parameters and materials

[0084] 1. Conductor layer: 24 ultrafine tinned copper wires (diameter 0.10mm) asymmetrically stranded (inner layer strand pitch 8 times, outer layer 12 times);

[0085] Central tensile core: aramid fiber (60%) + carbon fiber (40%) composite core (diameter 1.2mm, tensile strength 600MPa).

[0086] 2. Insulation layer:

[0087] PI nanofiber woven tape (thickness 0.1mm, weaving density 100 roots / cm 2 );

[0088] hBN modified TPE outer layer (hBN content 8%, thickness 0.4mm).

[0089] 3. Reinforced layer:

[0090] Three-dimensional weaving: warp aramid (linear density 1680D), weft UHMWPE (linear density 440D); local reinforcement at the joint: TPU / carbon fiber reinforcement sheet (5mm x 5mm, thickness 0.5mm).

[0091] 4. Sheath layer:

[0092] Four-layer co-extrusion total thickness 1.8mm:

[0093] Fluorinated TPE (0.2 mm);

[0094] SEBS / TPU dynamically crosslinked layer (0.6 mm);

[0095] Halogen-free flame-retardant TPE (0.8 mm);

[0096] Bio-based TPE surface layer (0.2 mm).

[0097] Performance tests

[0098]

[0099] Example six:

[0100] New energy vehicle high-voltage cable for high-voltage (800V), high-temperature (engine compartment), electromagnetic interference protection.

[0101] 1. Conductor layer:

[0102] Silver-plated copper wire (silver layer thickness 3 μm) 61 strands (cross-sectional area 50 mm 2 ); Tensile core: carbon fiber (diameter 1.5 mm, tensile strength 700 MPa).

[0103] 2. Insulation layer:

[0104] PI nanofiber braided tape (thickness 0.15 mm);

[0105] hBN modified TPE (hBN content 10%, thickness 0.5 mm).

[0106] 3. Shielding layer:

[0107] Silver-plated copper wire braiding (coverage 95%, braiding angle 45°);

[0108] Graphene coating (surface resistance 0.8 Ω / sq, thickness 15 μm).

[0109] 4. Sheath layer:

[0110] Four-layer co-extrusion total thickness 2.0 mm:

[0111] Fluorinated TPE (0.3 mm);

[0112] SEBS / TPU layer (0.7 mm);

[0113] Halogen-free flame-retardant TPE (0.8 mm);

[0114] Bio-based TPE (0.2 mm).

[0115] Performance tests

[0116]

[0117]

[0118] Example Seven:

[0119] Cold-resistant cable for polar expedition equipment, applied to low temperature of 60°C, frequent mechanical impact (snowmobile dragging).

[0120] 1. Conductor layer:

[0121] Tinned copper wire 19 strands (diameter 0.12 mm);

[0122] Tensile core: aramid fiber (diameter 1.0 mm, tensile strength 550 MPa).

[0123] 2. Buffer layer:

[0124] Gradient foaming TPE (foaming rate inner layer 30%→outer layer 70%);

[0125] SMA microfilament network (NiTi alloy, phase transition temperature 30°C).

[0126] 3. Sheath layer:

[0127] Four-layer co-extrusion total thickness 2.2 mm:

[0128] Fluorinated TPE (0.3 mm);

[0129] SEBS / POE blend layer (0.8 mm, glass transition temperature 70°C);

[0130] Halogen-free flame-retardant TPE (0.9 mm);

[0131] Anti-UV TPE (0.2 mm, containing 2% nano-TiO2).

[0132] Performance test

[0133]

[0134]

[0135] Example Eight:

[0136] Salt spray resistant cable for marine engineering, applied to high humidity, salt spray corrosion (offshore oil platform).

[0137] 1. Chemical protection layer:

[0138] ePTFE film wrapping (thickness 0.15 mm, overlap rate 50%);

[0139] PFPE oil immersion (contact angle 115°).

[0140] 2. Jacket layer:

[0141] Four-layer co-extrusion total thickness 2.5mm:

[0142] Fluorinated TPE (0.4mm);

[0143] SEBS / TPU layer (0.8mm);

[0144] Halogen-free flame-retardant TPE (1.0mm);

[0145] Salt spray resistant TPE (with 5% silane coupling agent, 0.3mm).

[0146] Performance tests

[0147]

[0148]

[0149] The above examples verify the excellent performance of the TPE cable of the present application in high temperature, low temperature, corrosion, dynamic bending and biocompatibility scenarios through differentiated structural design and material selection. Each example contains quantifiable test data, conforms to international standards, and fully supports the practicality and innovation of the patent.

Claims

1. TPE new thermoplastic rubber flexible cable, including tensile conductor, insulating shielding sleeve and outer jacket, characterized in that: A buffer filling layer and a tear-resistant layer are provided inside the outer jacket, and a high-temperature resistant layer is provided between the inner jacket and the insulating shielding sleeve. The high-temperature resistant layer is composed of a polyimide nanofiber braid and an outer jacket layer. The polyimide nanofiber braid and the outer jacket layer are successively sleeved on the outer layer of the tensile conductor, which can block instantaneous high temperatures and enhance the temperature resistance of the tensile conductor. The tensile conductor consists of two parts, the middle part is a tensile core, and the outer side of the tensile core is provided with oxygen-free copper wire, which together form a composite core to bear the mechanical load and avoid fatigue fracture of the copper wire during use of the cable; The outer jacket is provided with a multifunctional protective component, which consists of an inner lining layer, an intermediate layer, an outer layer and a surface layer. The layered protection improves the chemical corrosion resistance and tear resistance of the cable and realizes flame retardancy and environmental protection functions.

2. The TPE new thermoplastic rubber flexible cable according to claim 1 is characterized in that: The oxygen-free copper wire is an ultrafine oxygen-free copper wire with a diameter of 0.08-0.12 mm. The oxygen-free copper wire adopts an asymmetric spiral twisting design, with the inner layer twist length being 8-10 times the diameter of the copper wire and the outer layer twist length being 12-15 times, which can reduce bending stress concentration during cable use.

3. The TPE new thermoplastic rubber flexible cable according to claim 1, characterized in that: The insulating shielding sleeve adopts a double shielding structure to achieve broadband electromagnetic shielding of the cable.

4. The TPE new thermoplastic rubber flexible cable according to claim 1, characterized in that: The high temperature resistant layer and the buffer filling layer are both double-layered, which enhances the thermal stability of TPE and its shrinkage when overheated, thereby compensating for creep deformation of the sheath.

5. The TPE new thermoplastic rubber flexible cable according to claim 1 is characterized in that: The multifunctional protective component is a four-layer co-extrusion structure, which is composed of fluorinated TPE, dynamic cross-linked SEBS / TPU blend, halogen-free flame retardant TPE and bio-based TPE.

6. The TPE new thermoplastic rubber flexible cable according to claim 3, characterized in that: The insulating shielding sleeve comprises a silver-plated copper wire braid layer and a graphene conductive coating from the inside to the outside.

7. The TPE new thermoplastic rubber flexible cable according to claim 5, characterized in that: The fluorinated TPE is 85% TPE matrix + 10% polyphenylene sulfide + 5% boron nitride, and the dynamically cross-linked SEBS / TPU is 70% SEBS + 25% TPU + 5% dynamic disulfide bond cross-linking agent.

8. The TPE new thermoplastic rubber flexible cable according to claim 1, characterized in that: The tear-resistant layer is a three-dimensional bionic woven structure, and key node positions are locally reinforced with TPU / carbon fiber composite materials.

9. The method for preparing the novel TPE thermoplastic rubber flexible cable according to any one of claims 1 to 8, characterized in that: The process steps include: S1: Conductor stranding and tensile core forming are done simultaneously; S2: Polyimide nanofiber braid and hBN / TPE co-extruded into a high-temperature resistant layer; S3: The buffer filling layer adopts supercritical CO2 foaming technology; S4: Four-layer sheath co-extrusion.

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