High-voltage wiring harness ribbon material for new energy automobile and preparation method of high-voltage wiring harness ribbon material

Abstract

The invention relates to the field of functional materials, and discloses a high-voltage wiring harness ribbon material for a new energy automobile and a preparation method of the high-voltage wiring harness ribbon material. A high-voltage wiring harness tie material for a new energy automobile is prepared by dipping a needle-punched non-woven fabric in a composite glue solution and curing the needle-punched non-woven fabric, and the composite glue solution is prepared from the following raw materials in parts by weight: 28-38 parts of a waterborne polyurethane emulsion, 15-25 parts of a styrene / dodecafluoroheptyl methacrylate copolymer emulsion, 1-3 parts of 1, 2-propylene glycol, 1-3 parts of a curing agent, 1-3 parts of a curing agent and 1-3 parts of a curing agent. The coating is prepared from the following components in parts by weight: 4-8 parts of dimethyl 1, 4-cyclohexane dicarboxylate, 20-30 parts of filler, 3-6 parts of a homogenizing agent, 0.1-0.3 part of a curing agent and 60-80 parts of water. The prepared high-voltage wire harness binding belt material has good mechanical strength and flexibility, and the problems of cracking and loosening are not prone to occurring after long-term use.

Description

Technical Field

[0001] This application relates to the field of functional materials, and in particular to a high-voltage wiring harness material for new energy vehicles and a method for preparing the same. Background Technology

[0002] In new energy vehicles, wiring harnesses connecting high-voltage components such as battery packs, motor controllers, drive motors, DC-DC converters, and chargers need to be secured with cable ties. For example, the wiring harness between the battery pack and the vehicle controller uses cable ties to prevent wear or tangling caused by displacement of the high-voltage wiring harness due to driving vibrations and bumps, ensuring stable power transmission and preventing short circuits, open circuits, and other faults from affecting the performance and safety of the new energy vehicle.

[0003] The commonly used cable tie materials in the existing technology are generally nylon cable ties or polyphenylene sulfide cable ties. Although nylon cable ties and polyphenylene sulfide cable ties have good mechanical strength, they are also relatively rigid and brittle. Under repeated bending and stretching, they are prone to cracking and loosening.

[0004] Some cable ties use metal-core nylon straps, which further enhance the toughness and strength of the nylon straps through the metal core. However, when new energy vehicles are in motion, the high-voltage wiring harness will undergo slight displacement due to the vibration of the vehicle body. The metal core of the cable tie is rigid and inelastic, which makes it easy for the metal core to continuously rub against the outer nylon layer. After long-term use, the nylon layer is prone to wear, reducing the binding stability of the high-voltage wiring harness. Summary of the Invention

[0005] To address the issue that existing high-voltage wiring harness cable tie materials used in new energy vehicles cannot adequately balance strength, flexibility, and wear resistance, this application provides a high-voltage wiring harness cable tie material for new energy vehicles and its preparation method.

[0006] In a first aspect, this application provides a high-voltage wiring harness cable tie material for new energy vehicles, employing the following technical solution: A high-voltage wiring harness cable tie material for new energy vehicles is prepared by impregnating needle-punched nonwoven fabric with a composite adhesive and then curing it. The composite adhesive is prepared from the following raw materials in parts by weight: 28-38 parts of waterborne polyurethane emulsion 15-25 parts of styrene / dodecylfluoroheptyl methacrylate copolymer emulsion 4-8 parts of dimethyl 1,4-cyclohexanedicarboxylate 20-30 parts of filler 3-6 parts homogenizer Hardener 0.1-0.3 parts 60-80 parts water.

[0007] By adopting the above technical solutions, the waterborne polyurethane emulsion possesses good flexibility and abrasion resistance, endowing the cable tie material with certain elasticity and wear resistance; the styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion exhibits excellent chemical stability and corrosion resistance, improving the weather resistance and anti-aging ability of the cable tie material; dimethyl 1,4-cyclohexanedicarboxylate enhances the cohesiveness and flexibility of the material, improving the overall strength of the cable tie. The synergistic effect of these three components allows the cable tie material to possess both flexibility and high strength and stability. Fillers increase the hardness and abrasion resistance of the cable tie material; homogenizers ensure uniform dispersion of the components in the composite adhesive, preventing stratification and sedimentation, further guaranteeing the stability of the cable tie material's quality; curing agents promote the curing of the composite adhesive, allowing for better bonding between the needle-punched nonwoven fabric and the composite adhesive. Water, as a solvent, facilitates the dissolution and mixing of the raw materials. The cable tie material of this application solves the problem that existing high-voltage wiring harness cable tie materials used in new energy vehicles cannot adequately balance strength, flexibility, and wear resistance. It has advantages such as high strength, good flexibility, excellent insulation, wear resistance, and anti-aging properties. It can effectively prevent problems such as cracking and loosening of the cable tie during repeated bending, stretching, and friction with the high-voltage wiring harness, ensuring the stability of the high-voltage wiring harness binding, ensuring the stable power transmission of the high-voltage wiring harness in new energy vehicles, and avoiding short circuits, open circuits, and other faults that affect vehicle performance and safety.

[0008] Preferably, the styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion is prepared from the following raw materials in parts by weight: 15-25 parts of styrene monomer 9-16 parts of dodecafluoroheptyl methacrylate 1-2 parts emulsifier Initiator 0.1-0.25 parts 60-70 parts water.

[0009] By adopting the above technical solution, a styrene / dodecylfluoroheptyl methacrylate copolymer emulsion is prepared using styrene monomer, dodecylfluoroheptyl methacrylate, emulsifier, initiator, and water. The styrene monomer imparts a certain rigidity and strength to the copolymer; dodecylfluoroheptyl methacrylate can improve the copolymer's chemical corrosion resistance, low surface energy, and hydrophobicity, thereby enhancing the stability and durability of the cable tie material; the emulsifier enables the monomer to form a stable emulsion system in the aqueous phase, which is conducive to the polymerization reaction; the initiator can initiate the polymerization reaction of the monomer, ensuring the smooth synthesis of the copolymer; ultimately, when the prepared styrene / dodecylfluoroheptyl methacrylate copolymer emulsion is applied to high-voltage wire harness cable tie materials, it better balances strength, flexibility, and wear resistance.

[0010] Preferably, the styrene / dodecylfluoroheptyl methacrylate copolymer emulsion is prepared by the following steps: adding styrene monomer, dodecylfluoroheptyl methacrylate, emulsifier, initiator and water into a reaction device, and reacting under a nitrogen atmosphere to obtain the styrene / dodecylfluoroheptyl methacrylate copolymer emulsion.

[0011] By adopting the above technical solution, a styrene / dodecylfluoroheptyl methacrylate copolymer emulsion is prepared by heating the reaction under a nitrogen atmosphere. The nitrogen atmosphere can prevent the raw materials from reacting with oxygen in the air, ensuring the stability of the reaction and the purity of the product. Heating the reaction can accelerate the reaction rate, allowing the styrene monomer and dodecylfluoroheptyl methacrylate to undergo a more complete copolymerization reaction, thereby obtaining a styrene / dodecylfluoroheptyl methacrylate copolymer emulsion with good performance.

[0012] Preferably, the emulsifier is any one or a combination of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, and fatty alcohol polyoxyethylene ether; the initiator is ammonium persulfate and / or potassium persulfate.

[0013] By adopting the above technical solution and using the above emulsifier, the surface tension at the oil-water interface can be effectively reduced, allowing styrene monomer and dodecyl fluoroheptyl methacrylate to be better dispersed in the aqueous phase, forming a stable emulsion system and improving the uniformity and stability of the polymerization reaction. Using ammonium persulfate and / or potassium persulfate as initiators, the free radicals generated by their decomposition can initiate the polymerization reaction of styrene monomer and dodecyl fluoroheptyl methacrylate, with high initiation efficiency and mild reaction conditions, which is beneficial for controlling the molecular weight and structure of the copolymer, thereby making the obtained styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion with better performance.

[0014] Preferably, the reaction temperature is 70-85℃ and the reaction time is 1.5-2.5h.

[0015] By adopting the above technical solution, the optimized reaction conditions enable styrene monomer, dodecyl fluoroheptyl methacrylate, emulsifier, initiator and water to react fully, thereby obtaining a high-performance styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion, thus ensuring the comprehensive performance of the composite adhesive.

[0016] Preferably, the filler is any one or a combination of fumed silica, talc, and calcined kaolin.

[0017] By adopting the above technical solutions, the strength and flexibility of cable tie materials can be improved. These materials have good insulation properties, which can enable the cable tie materials to better balance strength, flexibility and wear resistance, avoid problems such as cracking and loosening due to insufficient strength, or leakage due to poor insulation, and ensure the stability of high-voltage wire harness bundling.

[0018] Preferably, the homogenizer is composed of allyl polyethylene glycol and fatty amine polyoxyethylene ether in a weight ratio of 1:(2-4).

[0019] By adopting the above technical solution, allyl polyethylene glycol exhibits excellent dispersibility and wettability, enabling uniform dispersion of all components in the composite adhesive, preventing agglomeration of fillers and other raw materials, and improving the stability and uniformity of the adhesive. Fatty amine polyoxyethylene ether has emulsifying, solubilizing, and dispersing effects, reducing surface tension, allowing for better mixing of raw materials, and enhancing the fluidity and compatibility of the adhesive. The synergistic effect of these two components further improves the uniformity and stability of the composite adhesive, resulting in more stable performance of the high-voltage wire harness cable tie material prepared by impregnating needle-punched nonwoven fabric with the composite adhesive.

[0020] Preferably, the curing agent is composed of triglycidyl isocyanurate and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane in a weight ratio of 1:(1-2).

[0021] By adopting the above technical solution and optimizing the type and ratio of curing agent, the needle-punched nonwoven fabric impregnation composite adhesive can be stably cured under optimal temperature conditions, resulting in high-voltage wire harness cable tie material with good strength, flexibility and wear resistance.

[0022] Secondly, this application provides a method for preparing high-voltage wiring harness cable tie material for new energy vehicles, employing the following technical solution: A method for preparing a high-voltage wiring harness cable tie material for new energy vehicles includes the following steps: immersing needle-punched cloth in a composite adhesive solution, impregnating and rolling, repeating 4-6 times, and drying to obtain the high-voltage wiring harness cable tie material for new energy vehicles.

[0023] By adopting the above technical solution, the needle-punched fabric is immersed in the composite adhesive and rolled repeatedly to allow the composite adhesive to fully penetrate into the fiber structure of the needle-punched fabric, ensuring that the performance of each part of the material is uniform and stable. After drying, the composite adhesive is cured, thereby obtaining a high-voltage wire harness cable tie material for new energy vehicles. This preparation method is simple and effective, and the cable tie material can well balance strength, flexibility and wear resistance.

[0024] Preferably, the basis weight of the needle-punched fabric is 220-250 g / m². 2 The impregnation rate of needle-punched fabric is 65-75%.

[0025] By adopting the above technical solution, the needle-punched boroxseed weight is set to 220-250 g / m². 2This ensures that the cable tie material has appropriate strength and flexibility. It will not be too light, resulting in insufficient strength and easy damage during use, nor will it be too heavy, reducing flexibility and making it difficult to bundle high-voltage wire harnesses. The impregnation rate of the needle-punched fabric is set to 65-75%, which allows the needle-punched nonwoven fabric to be fully impregnated with the composite adhesive, ensuring that the composite adhesive is evenly distributed in the needle-punched fabric.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. The high-voltage wiring harness cable tie material for new energy vehicles of this application is made by impregnating needle-punched nonwoven fabric with a composite adhesive prepared from water-based polyurethane emulsion, styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion, dimethyl 1,4-cyclohexanedicarboxylate, filler, homogenizer, curing agent and water, and then curing it. It can prevent the high-voltage wiring harness of new energy vehicles from being worn or tangled due to driving vibration and bumps, ensure stable power transmission, avoid short circuits, open circuits and other faults from affecting the performance and safety of new energy vehicles, and can better balance strength, flexibility and wear resistance.

[0027] 2. The styrene / dodecylfluoroheptyl methacrylate copolymer emulsion is made from styrene monomer, dodecylfluoroheptyl methacrylate, emulsifier, initiator and water, which helps to improve the strength, flexibility and abrasion resistance of cable tie materials.

[0028] 3. The homogenizer is composed of allyl polyethylene glycol and fatty amine polyoxyethylene ether, which can make the components of the composite adhesive solution evenly dispersed, improve the impregnation efficiency, and further enhance the flexibility and strength of the cable tie material. Detailed Implementation

[0029] The present application will be further described in detail below with reference to preparation examples and embodiments.

[0030] Preparation Example 1 of Styrene / Dodecylfluoroheptyl Methacrylate Copolymer Emulsion Preparation Example 1 discloses a styrene / dodecylfluoroheptyl methacrylate copolymer emulsion, which is prepared by the following steps: 1.5 kg of styrene monomer, 0.9 kg of dodecylfluoroheptyl methacrylate, 0.1 kg of sodium dodecyl sulfate as emulsifier, 0.01 kg of ammonium persulfate as initiator and 6 kg of water are added to a reaction vessel, and the mixture is heated to 70 °C under a nitrogen atmosphere and reacted for 2.5 h to obtain the styrene / dodecylfluoroheptyl methacrylate copolymer emulsion.

[0031] Preparation Examples 2-3 The difference between Preparation Example 2-3 and Preparation Example 1 lies in the amount of raw materials used and the preparation conditions, as detailed in Table 1 below.

[0032] Table 1. Parameters for Preparation Examples 1-3 Preparation of Comparative Example 1 The difference between Comparative Example 1 and Preparation Example 3 is that dodecafluoroheptyl methacrylate was replaced with tetrafluoropropyl methacrylate in equal amounts; otherwise, they were the same as in Preparation Example 3.

[0033] Preparation of Comparative Example 2 The difference between Comparative Example 2 and Preparation Example 3 is that dodecafluoroheptyl methacrylate was replaced with an equal amount of hydroxyethyl methacrylate, while the rest was the same as Preparation Example 3. Example

[0034] Example 1 Example 1 discloses a method for preparing high-voltage wiring harness cable tie material for new energy vehicles, comprising the following steps: impregnating needle-punched fabric in a composite adhesive solution, followed by rolling and pressing, repeated 4 times, and controlling the drying conditions as follows: zone 1 air supply temperature 80℃, zone 2 air supply temperature 100℃, zone 3 air supply temperature 140℃, and drying speed 5 m / min, thereby obtaining the high-voltage wiring harness cable tie material for new energy vehicles. The needle-punched fabric is polyester needle-punched fabric with a basis weight of 220 g / m². 2 The impregnation rate of the needle-punched fabric is 65%. It should be noted that the impregnation rate = impregnation mass / weight of needle-punched fabric * 100%.

[0035] The composite adhesive was prepared from the following raw materials in parts by weight: 2.8 kg of waterborne polyurethane emulsion, 1.5 kg of styrene / dodecyl methacrylate copolymer emulsion prepared in Preparation Example 1, 0.4 kg of dimethyl 1,4-cyclohexanedicarboxylate, 2 kg of filler, 0.3 kg of homogenizer, 0.01 kg of curing agent, and 6 kg of water; The filler is composed of fumed silica and kaolin in a weight ratio of 3:1; the homogenizer is polyethylene glycol 400; the curing agent is composed of triglycidyl isocyanate and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane in a weight ratio of 1:1. The waterborne polyurethane emulsion is AnDa Huatai AH-1619, the fumed silica has a particle size of 50-100nm, and the kaolin has a particle size of 0.1-0.3μm.

[0036] Example 2-3 The difference between Examples 2-3 and Example 1 lies in the different amounts of raw materials and process parameters, as detailed in Table 2 below.

[0037] Table 2 Parameter table for Examples 1-3 Example 4 The difference between Example 4 and Example 3 is that the homogenizer is composed of allyl polyethylene glycol and fatty amine polyoxyethylene ether in a weight ratio of 1:2. The molecular weight of allyl polyethylene glycol is 1000, and the fatty amine polyoxyethylene ether is Hai Shi Hua AC-1810. The rest is the same as in Example 3.

[0038] Example 5 The difference between Example 5 and Example 4 is that the homogenizer is composed of allyl polyethylene glycol and fatty amine polyoxyethylene ether in a weight ratio of 1:4, while the rest is the same as in Example 4.

[0039] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 3 is that the styrene / dodecylfluoroheptyl methacrylate copolymer emulsion was derived from the preparation of Comparative Example 1, while the rest is the same as Example 3.

[0040] Comparative Example 2 The difference between Comparative Example 2 and Example 3 is that the styrene / dodecylfluoroheptyl methacrylate copolymer emulsion was derived from the preparation of Comparative Example 2, while the rest is the same as Example 3.

[0041] Comparative Example 3 The difference between Comparative Example 3 and Example 3 is that the styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion was replaced in an equal amount with a styrene / acrylate emulsion, model Acronal 7805ap, content 50%; otherwise, it was the same as Example 3.

[0042] Comparative Example 4 The difference between Comparative Example 4 and Example 3 is that 1,4-cyclohexanedicarboxylic acid dimethyl ester was replaced with an equal amount of waterborne polyurethane emulsion, while the rest was the same as in Example 3.

[0043] Comparative Example 5 The difference between Comparative Example 5 and Example 3 is that the styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion was replaced with an equal amount of waterborne polyurethane emulsion, while the rest was the same as in Example 3.

[0044] Performance testing The following tests were conducted on the performance of the high-voltage wiring harness cable tie materials for new energy vehicles prepared in Examples 1-5 and Comparative Examples 1-5: The width of the high-voltage wiring harness cable tie material is 4.8 mm.

[0045] 1. Tensile strength and elongation at break tests The tensile strength (unit: MPa) and elongation at break (unit: %) of the high-voltage wire harness cable tie were tested using a tensile testing machine at 25°C. 2. Abrasion resistance test Using a Martindale abrasion tester, with an abrasion load of 595g and an abrasion pressure of 9kPa, the number of times the high-voltage cable ties broke was tested. Observations were made every 200 times, and the test results were recorded. The following are the performance test data of the high-voltage wiring harness cable tie materials for new energy vehicles prepared in Examples 1-5 and Comparative Examples 1-5, as detailed in Table 3 below.

[0046] Table 3. Data on high-voltage wiring harness cable tie materials for new energy vehicles prepared in Examples 1-5 and Comparative Examples 1-5. Based on Examples 1-3 and 4-5 and Table 3, it can be concluded that by optimizing the composition and proportion of the homogenizer in the composite adhesive, the strength of the obtained high-voltage wire harness cable tie material can be improved, while its flexibility and wear resistance can also be enhanced. This may be because the homogenizer improves the dispersion uniformity of each component in the system.

[0047] Based on Example 3 and Comparative Examples 1-2, and in conjunction with Table 3, it can be concluded that using the styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion prepared from specific components of this application to prepare the composite adhesive can significantly improve the strength, flexibility, and abrasion resistance of the obtained high-voltage wire harness cable ties. Compared with Example 3, Comparative Examples 1-2 changed the composition of the reactive monomers, and although the tensile strength of the obtained high-voltage wire harness cable ties was slightly improved, the elongation at break was significantly reduced, and the number of abrasion cycles was also significantly reduced.

[0048] Based on Examples 3 and Comparative Examples 3-5, and referring to Table 3, it can be concluded that using the waterborne polyurethane emulsion, styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion, and dimethyl 1,4-cyclohexanedicarboxylate of this application in a compound can significantly improve the strength, flexibility, and abrasion resistance of the prepared high-voltage wire harness cable ties. In Comparative Examples 3-5, the types of the three compounds were changed. Although the tensile strength of the prepared high-voltage wire harness cable ties was improved, the elongation at break was significantly reduced, and the abrasion resistance was also significantly reduced. This may be because the reduced flexibility of the high-voltage wire harness cable ties makes them prone to permanent wear damage that is difficult to recover from.

[0049] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A high-voltage wiring harness cable tie material for new energy vehicles, characterized in that, The composite adhesive is prepared by impregnating and curing needle-punched nonwoven fabric with a composite adhesive solution, wherein the composite adhesive solution is prepared from the following raw materials in parts by weight: 28-38 parts of waterborne polyurethane emulsion 15-25 parts of styrene / dodecylfluoroheptyl methacrylate copolymer emulsion 4-8 parts of dimethyl 1,4-cyclohexanedicarboxylate 20-30 parts of filler 3-6 parts homogenizer Hardener 0.1-0.3 parts 60-80 parts water.

2. The high-voltage wiring harness cable tie material for new energy vehicles according to claim 1, characterized in that, The styrene / dodecyl fluoroheptyl methacrylate copolymer emulsion is prepared from the following raw materials in parts by weight: 15-25 parts of styrene monomer 9-16 parts of dodecafluoroheptyl methacrylate 1-2 parts emulsifier Initiator 0.1-0.25 parts 60-70 parts water.

3. The high-voltage wiring harness cable tie material for new energy vehicles according to claim 2, characterized in that, The styrene / dodecylfluoroheptyl methacrylate copolymer emulsion is prepared by the following steps: adding styrene monomer, dodecylfluoroheptyl methacrylate, emulsifier, initiator and water into a reaction device, and reacting under a nitrogen atmosphere to obtain the styrene / dodecylfluoroheptyl methacrylate copolymer emulsion.

4. The high-voltage wiring harness cable tie material for new energy vehicles according to claim 3, characterized in that, The emulsifier is any one or a combination of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, and fatty alcohol polyoxyethylene ether; the initiator is ammonium persulfate and / or potassium persulfate.

5. The high-voltage wiring harness cable tie material for new energy vehicles according to claim 3, characterized in that, The reaction temperature is 70-85℃, and the reaction time is 1.5-2.5h.

6. The high-voltage wiring harness cable tie material for new energy vehicles according to claim 1, characterized in that, The filler is any one or a combination of fumed silica, talc, and calcined kaolin.

7. The high-voltage wiring harness cable tie material for new energy vehicles according to claim 1, characterized in that, The homogenizer is composed of allyl polyethylene glycol and fatty amine polyoxyethylene ether in a weight ratio of 1:(2-4).

8. The high-voltage wiring harness cable tie material for new energy vehicles according to claim 1, characterized in that, The curing agent is composed of triglycidyl isocyanurate and 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane in a weight ratio of 1:(1-2).

9. A method for preparing a high-voltage wiring harness cable tie material for new energy vehicles as described in any one of claims 1-8, characterized in that, Includes the following steps: Needle-punched fabric is impregnated in a composite adhesive solution, impregnated and rolled, cyclically 4-6 times, and dried to obtain a high-voltage wiring harness cable tie material for new energy vehicles.

10. A method for preparing a high-voltage wiring harness cable tie material for new energy vehicles according to claim 9, characterized in that, The basis weight of needle-punched fabric is 220-250 g / m². 2 The impregnation rate of needle-punched fabric is 65-75%.

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