Modified TPE steering wheel cover with good elasticity and no peculiar smell

Abstract

The invention belongs to the technical field of automobile parts, and particularly relates to a modified TPE steering wheel cover with good elasticity and no peculiar smell. In order to solve the problem that in the prior art, installation is inconvenient only through the elasticity of an inner sleeve material, the modified TPE steering wheel sleeve which is good in elasticity and free of peculiar smell is provided and comprises an outer layer and an elastic layer fixedly connected to the interior of the outer layer, and the outer layer and the elastic layer are each of a hollow annular structure; a containing cavity used for containing a steering wheel is located in the elastic layer, openings are formed in the corresponding positions of the outer layer and the surface of one side of the elastic layer and communicate with the containing cavity, hollowed-out grooves penetrating through the side wall of the elastic layer are further formed in the surface of the elastic layer, the hollowed-out grooves are in a long strip shape, and a plurality of hollowed-out grooves are evenly formed in the circumferential direction of the axis of the elastic layer. According to the steering wheel cover, the long-strip-shaped hollowed-out grooves are evenly formed in the surface of the elastic layer located in the steering wheel cover, in this way, the elastic layer can generate large deformation conveniently in the installation process, and the installation process of the steering wheel cover is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile accessories, and in particular relates to a modified TPE steering wheel cover with good elasticity and no peculiar smell. Background Art

[0002] With the development of my country's economy, more and more families own cars. Car steering wheel covers are mainly used to protect the steering wheel of the car and prevent the steering wheel from being worn, dirty, and other problems due to excessive use. Conventional car steering wheel covers usually include an outer sleeve and an inner sleeve in a ring shape. The inner sleeve is used to be sleeved on the car steering wheel, and the outer sleeve is sleeved outside the inner sleeve and fixedly connected to the inner sleeve. Since the inner sleeve needs to be more snugly sleeved on the surface of the car steering wheel, the size of the inner sleeve in the prior art is relatively close to the size of the car steering wheel. It is troublesome to sleeve it on the car steering wheel during the installation process and the installation is inconvenient only because of the elasticity of the inner sleeve material itself.

[0003] For example, a Chinese invention patent discloses a car steering wheel cover [application number: 201910274723.3], which includes an outer sleeve with a circumferential opening and an inner sleeve with a circumferential opening, wherein the outer sleeve is sleeved outside the inner sleeve, and the outer sleeve includes a non-retractable fixed portion and an elastically retractable elastic portion, wherein the two ends of the fixed portion are respectively connected to the two ends of the elastic portion, so that the outer sleeve is in a closed ring shape, the fixed portion is fixedly connected to the inner sleeve, and a fracture line is provided on the inner sleeve corresponding to the elastic portion, wherein the fracture line extends from one side of the circumferential opening of the inner sleeve to the other side of the circumferential opening of the inner sleeve. And when the fracture line is torn, the inner sleeve forms a fracture at the location of the fracture line, and the fracture line is arranged along the shortest distance from one side of the circumferential opening of the inner sleeve to the other side of the circumferential opening of the inner sleeve, and a concave fracture groove is provided on both sides of the circumferential opening of the inner sleeve corresponding to the elastic part, and the two ends of the fracture line are respectively located at the bottom of the two fracture grooves, and the fracture grooves are in the shape of an isosceles triangle, a semicircle or a semi-ellipse, and a concave thinning groove is provided on both sides of the circumferential opening of the inner sleeve corresponding to the elastic part, and the width of the thinning groove is greater than the fracture groove, and the fracture groove is arranged at the bottom of the corresponding thinning groove.

[0004] This invention patent has the advantages of high overall roundness, good comfort in use, low manufacturing cost, high dimensional accuracy, and not easy to loosen or slip with the car steering wheel, but it still does not solve the above-mentioned problems. Summary of the invention

[0005] The object of the present invention is to provide a modified TPE steering wheel cover with good elasticity and no odor in view of the above problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A modified TPE steering wheel cover with good elasticity and no odor, comprising an outer layer and an elastic layer fixedly connected to the inner part of the outer layer, the outer layer and the elastic layer both present a hollow annular structure, a receiving cavity for receiving the steering wheel is located inside the elastic layer, openings are provided at corresponding positions on one side surface of the outer layer and the elastic layer, the openings are communicated with the receiving cavity, the surface of the elastic layer is also provided with a hollow groove penetrating the side wall of the elastic layer, the hollow groove is in a long strip shape, and a plurality of hollow grooves are evenly provided circumferentially along the axis of the elastic layer.

[0007] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, a plurality of suction cup fixings for fixing the elastic layer to the steering wheel are also provided in the accommodating cavity, and one end of the suction cup fixing is fixedly connected to the inner surface of the elastic layer.

[0008] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, the suction cup fixing part includes a fixing seat fixedly connected to the inner surface of the elastic layer and a suction cup movably connected to the fixing seat, and a limiting component is provided between the fixing seat and the suction cup.

[0009] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, the limiting assembly includes a first limiting convex eave fixedly connected to the inner side of the fixing seat and a second limiting convex eave fixedly connected to the side of the suction cup end, the second limiting convex eave is pressed on the first limiting convex eave, and the first limiting convex eaves are provided with at least two, and are arranged in sequence along the axial centerline direction of the fixing seat, and the distance between two adjacent first limiting convex eaves is 3-10mm.

[0010] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, two first limiting convex eaves are provided, namely a short limiting convex eaves and a long limiting convex eaves. The short limiting convex eaves are closer to the bottom of the fixed seat than the long limiting convex eaves. The long limiting convex eaves are provided with an annular positioning convex eaves on the side surface close to the second limiting convex eaves. The second limiting convex eaves are provided with an annular positioning groove sunken into the inside of the second limiting convex eaves. The sliding suction cup can make the annular positioning convex eaves embedded in the annular positioning groove. The annular positioning groove is closer to the axis of the fixed seat than the end of the shorter limiting convex eaves.

[0011] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, the suction cup fixing also includes a compression spring, one end of which is connected to the bottom of the fixing seat, and the other end is connected to the end of the suction cup, and the compression spring is in a compressed state.

[0012] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, the elastic layer is made of modified TPE material, and the modified TPE material includes 60-80 parts by mass of SBS resin, 10-30 parts by mass of calcium carbonate powder, 2-10 parts by mass of γ-aminopropyltriethoxysilane, 0.5-3 parts by mass of composite antioxidant and 5-20 parts by mass of tributyl citrate.

[0013] Traditional TPE materials contain carbon-carbon double bonds in their molecular structure, which are prone to oxidation reactions, thereby producing odor. Therefore, the present invention can effectively inhibit the occurrence of oxidation reactions for a long time by adding a composite antioxidant, thereby ensuring that no odor is produced.

[0014] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, the modified TPE material includes 70 parts by mass of SBS resin, 20 parts by mass of calcium carbonate powder, 6 parts by mass of γ-aminopropyltriethoxysilane, 2 parts by mass of composite antioxidant and 12 parts by mass of tributyl citrate.

[0015] γ-Aminopropyltriethoxysilane, also known as silane coupling agent KH-550, is a class of chemicals used to improve the compatibility between inorganic materials and organic polymers. They form an organic-inorganic interface on the surface of inorganic materials, enhancing the bonding between the two, thereby improving the performance of composite materials.

[0016] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, the composite antioxidant is a metal organic framework composite material loaded with a main antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and an auxiliary antioxidant tris[2,4-di-tert-butylphenyl] phosphite, the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:2, and the preparation method of the composite antioxidant is: The primary antioxidant and the auxiliary antioxidant are added to acetone to dissolve, and then the metal organic framework composite material is added, mixed evenly, heated to 40-60° C. for reaction for 2-6 hours, filtered to remove the solvent, and dried to obtain a composite antioxidant.

[0017] Pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] is antioxidant 1010, and tris[2,4-di-tert-butylphenyl] phosphite is antioxidant 168. The combination of antioxidant 1010 and antioxidant 168 has a good synergistic effect in improving the thermal oxidation stability of the product.

[0018] Metal-organic framework composites are composite materials based on MOF materials. MOF materials have high porosity and large specific surface area, and can load antioxidants. The continuous and stable release of antioxidants ensures that the material has a long-lasting and stable antioxidant effect.

[0019] In the above-mentioned modified TPE steering wheel cover with good elasticity and no odor, the metal organic framework composite material is a MOF-5 / graphene composite material, and is prepared by the following method: Step 1: prepare graphene dispersion, disperse graphene powder in DMF solvent, and perform ultrasonic treatment to make it evenly dispersed; Step 2: Prepare MOF-5 precursor solution, dissolve Zn(NO3)2·6H2O and terephthalic acid in DMF solvent, and the molar ratio of Zn(NO3)2·6H2O to terephthalic acid is 4:3-5:1; Step 3: Preparation of finished product: evenly mix the graphene dispersion prepared in step 1 and the MOF-5 precursor solution prepared in step 2, transfer the mixed solution to a hydrothermal reactor, heat at 95-100°C for 2-4h, cool naturally to room temperature, collect the precipitate by centrifugation or filtration, wash the precipitate with solvent deionized water, and obtain a MOF-5 / graphene composite material after drying.

[0020] (Molecular formula: C 24 H 12 O 13 Zn4, CAS No.: 255367-66-9) is a porous crystalline material based on zinc ions and terephthalic acid. MOF-5 has potential application value in many fields such as adsorption, separation, and catalysis due to its high porosity and large specific surface area. After MOF-5 is compounded with graphene materials, the mechanical properties and functionality of the material can be improved.

[0021] Compared with the prior art, the advantages of the present invention are: 1. The present invention evenly provides long strip-shaped hollow grooves on the surface of the inner elastic layer, so that the elastic layer can be easily deformed during the installation process, which facilitates the installation process of the steering wheel cover.

[0023] 2. The present invention provides a suction cup fixing member with a certain length adjustment space in the elastic layer, so that after the elastic layer becomes loose due to long-term use of the steering wheel cover, the steering wheel cover can still be fixed relatively firmly on the steering wheel surface.

[0025] 3. The present invention uses a MOF-5 / graphene composite material loaded with pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] and tris[2,4-di-tert-butylphenyl]phosphite as a composite antioxidant, which has a long-lasting and stable antioxidant effect, prevents the elastic layer from being oxidized and producing odor due to long-term use, and ensures driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is the main view of the elastic layer; Figure 3 is a cross-sectional view of a suction cup fixing member; Figure 4 for Figure 3 The enlarged view of point A in the middle; In the figure: outer layer 1, elastic layer 2, accommodating cavity 3, opening 4, hollow groove 5, suction cup fixing part 6, compression spring 60, fixing seat 61, suction cup 62, limiting assembly 63, first limiting convex eaves 64, second limiting convex eaves 65, short limiting convex eaves 66, long limiting convex eaves 67, annular positioning groove 68, annular positioning convex eaves 69. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] Example 1 This embodiment provides a modified TPE steering wheel cover with good elasticity and no odor, combined with Figure 1 and Figure 2 As shown, it comprises an outer layer 1 and an elastic layer 2 fixedly connected to the inner part of the outer layer 1, and the outer layer 1 is usually made of plush fabric. The outer layer 1 and the elastic layer 2 are both hollow annular structures, and a receiving cavity 3 for receiving the steering wheel is located inside the elastic layer 2. An opening 4 is provided at a corresponding position on one side surface of the outer layer 1 and the elastic layer 2, and the opening 4 is connected to the receiving cavity 3. The surface of the elastic layer 2 is also provided with a hollow groove 5 penetrating the side wall of the elastic layer 2, and the hollow groove 5 is in a long strip shape, and a plurality of hollow grooves 5 are evenly provided along the circumference of the axis of the elastic layer 2.

[0029] In the present invention, when in use, the elastic layer 2 is sleeved onto the surface of the steering wheel through the opening 4. During the sleeve process, the elastic layer 2 needs to undergo a certain deformation, and the provision of the long hollow grooves 5 can facilitate a large deformation of the elastic layer 2. Therefore, the present invention evenly provides long hollow grooves 5 on the surface of the elastic layer 2 located inside, so that during the installation process, the elastic layer 2 can be more conveniently deformed, which facilitates the installation process of the steering wheel cover.

[0030] Combination Figure 1 and Figure 3 As shown, the accommodating cavity 3 is further provided with a plurality of suction cup fixing members 6 for fixing the elastic layer 2 to the steering wheel, and one end of the suction cup fixing member 6 is fixedly connected to the inner surface of the elastic layer 2. The suction cup fixing member 6 can improve the bonding force between the steering wheel and the elastic layer 2 to prevent the problem of slipping. The suction cup fixing member 6 is made of a flexible material, such as a rubber material, a silicone material, or a modified TPE material that is the same as the elastic layer 2.

[0031] Specifically, the suction cup fixing member 6 includes a fixing seat 61 fixedly connected to the inner surface of the elastic layer 2 and a suction cup 62 movably connected to the fixing seat 61 , and a limiting component 63 is provided between the fixing seat 61 and the suction cup 62 .

[0032] The suction cup 62 is movably connected to the fixing seat 61, and the overall length of the suction cup fixing member 6 can be adjusted within a certain range when necessary. After the elastic layer 2 is used for a long time, the material itself will inevitably relax to a certain extent, resulting in a slightly larger distance between the steering wheel and the elastic layer 2. This slightly increased distance will act on the suction cup fixing member 6, so that the suction cup fixing member 6 is additionally subjected to a tensile force in the radial direction. When the tensile force reaches a certain level, the suction cup 62 will be separated from the surface of the steering wheel, and the function of fixing the elastic layer 2 to the surface of the steering wheel will be lost. Therefore, the present invention is provided with a suction cup fixing member 6 with a certain length adjustment space in the elastic layer 2. In this way, after the elastic layer 2 is relaxed due to the long-term use of the steering wheel cover, under the action of the radial tensile force, the fixing seat 61 and the suction cup 62 are relatively movable so that the overall length of the suction cup fixing member 6 is increased, thereby buffering the radial tensile force, so that the tensile force will not further act between the suction cup 62 and the steering wheel, thereby ensuring that the suction cup fixing member 6 can still fix the elastic layer 2 relatively firmly on the surface of the steering wheel.

[0033] Combination Figure 3 and Figure 4 As shown, the limiting assembly 63 includes a first limiting convex eave 64 fixedly connected to the inner side of the fixing seat 61 and a second limiting convex eave 65 fixedly connected to the side of the end of the suction cup 62, the second limiting convex eave 65 is pressed on the first limiting convex eave 64, and there are at least two first limiting convex eaves 64, which are arranged in sequence along the axial direction of the fixing seat 61, and the distance between two adjacent first limiting convex eaves 64 is 3-10mm.

[0034] Preferably, there are two first limiting eaves 64, namely a short limiting eaves 66 and a long limiting eaves 67. The short limiting eaves 66 is closer to the bottom of the fixing seat 61 than the long limiting eaves 67. The long limiting eaves 67 is provided with an annular positioning eaves 69 on the side surface close to the second limiting eaves 65. The second limiting eaves 65 is provided with an annular positioning groove 68 which is recessed into the inside of the second limiting eaves 65. The sliding suction cup 62 can make the annular positioning eaves 69 embedded in the annular positioning groove 68. The annular positioning groove 68 is closer to the axial center line of the fixing seat 61 than the end of the shorter limiting eaves 66.

[0035] The suction cup fixing member 6 has at least two states during use, namely Figure 3The initial state shown, and the stretched state of the second limit convex eave 65 pressed on the long limit convex eave 67 after being stretched. When it is first used, the suction cup fixing member 6 is in the initial state. After the elastic layer 2 is relaxed after long-term use, a radial force will gradually be generated to act on the fixing seat 61. When this force reaches a certain level, the second limit convex eave 65 will be deformed and bent and separated from the surface of the short limit convex eave 66. At this time, the suction cup 62 slides as a whole, and the suction cup fixing member 6 is stretched in its entirety until the second limit convex eave 65 is pressed on the long limit convex eave 67 to re-realize the relative fixation between the fixing seat 61 and the suction cup 62. At this time, the suction cup fixing member 6 switches to the stretched state. The annular positioning convex eave 69 cooperates with the annular positioning groove 68 to ensure the stability of the connection between the fixing seat 61 and the suction cup 62 in the stretched state. The annular positioning groove 68 is arranged on the outer side of the end of the short limit convex eave 66, which can facilitate the deformation and bending of the second limit convex eave 65.

[0036] like Figure 3 As shown, the suction cup fixing member 6 further includes a compression spring 60, one end of which is connected to the bottom of the fixing seat 61, and the other end is connected to the end of the suction cup 62, and the compression spring 60 is in a compressed state. The compression spring 60 can provide a pre-tightening force between the fixing seat 61 and the suction cup 62 to prevent the suction cup 62 of the suction cup fixing member 6 from being disturbed in the radial direction when in a stretched state.

[0037] The elastic layer 2 is made of a modified TPE material, which includes 80 parts by weight of SBS resin, 10 parts by weight of calcium carbonate powder, 2 parts by weight of γ-aminopropyltriethoxysilane, 0.5 parts by weight of a composite antioxidant and 5 parts by weight of tributyl citrate.

[0038] The composite antioxidant is a metal organic framework composite material loaded with a main antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and an auxiliary antioxidant tris[2,4-di-tert-butylphenyl] phosphite, the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:2, and the preparation method of the composite antioxidant is: The primary antioxidant and the auxiliary antioxidant are added to acetone to dissolve, and then the metal organic framework composite material is added, mixed evenly, heated to 60° C. for reaction for 6 hours, filtered to remove the solvent, and dried to obtain a composite antioxidant.

[0039] The metal organic framework composite material is a MOF-5 / graphene composite material, and is prepared by the following method: Step 1: prepare graphene dispersion, disperse graphene powder in DMF solvent, and perform ultrasonic treatment to make it evenly dispersed; Step 2: Prepare MOF-5 precursor solution, dissolve Zn(NO3)2·6H2O and terephthalic acid in DMF solvent, and the molar ratio of Zn(NO3)2·6H2O to terephthalic acid is 5:1; Step 3: Preparation of finished product: evenly mix the graphene dispersion prepared in step 1 and the MOF-5 precursor solution prepared in step 2 to ensure that the mass ratio of graphene to MOF-5 is 1:1, transfer the mixed solution to a hydrothermal reactor, heat at 100°C for 4 hours, cool naturally to room temperature, collect the precipitate by centrifugation or filtration, wash the precipitate with solvent deionized water, and obtain a MOF-5 / graphene composite material after drying.

[0040] Example 2 This embodiment provides a modified TPE steering wheel cover with good elasticity and no odor. Its specific structure is basically the same as that of Example 1, and the only difference is the material for preparing the elastic layer 2. Specifically: The elastic layer 2 is made of a modified TPE material, which includes 60 parts by weight of SBS resin, 30 parts by weight of calcium carbonate powder, 10 parts by weight of γ-aminopropyltriethoxysilane, 3 parts by weight of a composite antioxidant and 20 parts by weight of tributyl citrate.

[0041] The composite antioxidant is a metal organic framework composite material loaded with a main antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and an auxiliary antioxidant tris[2,4-di-tert-butylphenyl] phosphite, the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:2, and the preparation method of the composite antioxidant is: The primary antioxidant and the auxiliary antioxidant are added to acetone to dissolve, and then the metal organic framework composite material is added, mixed evenly, heated to 40° C. for reaction for 2 hours, filtered to remove the solvent, and dried to obtain a composite antioxidant.

[0042] The metal organic framework composite material is a MOF-5 / graphene composite material, and is prepared by the following method: Step 1: prepare graphene dispersion, disperse graphene powder in DMF solvent, and perform ultrasonic treatment to make it evenly dispersed; Step 2: Prepare MOF-5 precursor solution, dissolve Zn(NO3)2·6H2O and terephthalic acid in DMF solvent, and the molar ratio of Zn(NO3)2·6H2O to terephthalic acid is 4:3; Step 3: Preparation of finished product, mix the graphene dispersion prepared in step 1 and the MOF-5 precursor solution prepared in step 2 evenly, and ensure that the mass ratio of graphene to MOF-5 is 10:1. Transfer the mixed solution to a hydrothermal reactor, heat at 95°C for 2h, and naturally cool to room temperature. Collect the precipitate by centrifugation or filtration, wash the precipitate with solvent deionized water, and obtain MOF-5 / graphene composite material after drying.

[0043] Example 3 This embodiment provides a modified TPE steering wheel cover with good elasticity and no odor. Its specific structure is basically the same as that of Example 1, and the only difference is the material for preparing the elastic layer 2. Specifically: The elastic layer 2 is made of a modified TPE material, which includes 70 parts by weight of SBS resin, 20 parts by weight of calcium carbonate powder, 6 parts by weight of γ-aminopropyltriethoxysilane, 2 parts by weight of a composite antioxidant and 12 parts by weight of tributyl citrate.

[0044] The composite antioxidant is a metal organic framework composite material loaded with a main antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and an auxiliary antioxidant tris[2,4-di-tert-butylphenyl] phosphite, the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:2, and the preparation method of the composite antioxidant is: The primary antioxidant and the auxiliary antioxidant are added to acetone to dissolve, and then the metal organic framework composite material is added, mixed evenly, heated to 50° C. for reaction for 4 hours, filtered to remove the solvent, and dried to obtain a composite antioxidant.

[0045] The metal organic framework composite material is a MOF-5 / graphene composite material, and is prepared by the following method: Step 1: prepare graphene dispersion, disperse graphene powder in DMF solvent, and perform ultrasonic treatment to make it evenly dispersed; Step 2: Prepare MOF-5 precursor solution, dissolve Zn(NO3)2·6H2O and terephthalic acid in DMF solvent, and the molar ratio of Zn(NO3)2·6H2O to terephthalic acid is 3:1; Step 3: Preparation of finished product, mix the graphene dispersion prepared in step 1 and the MOF-5 precursor solution prepared in step 2 evenly, and ensure that the mass ratio of graphene to MOF-5 is 5:1. Transfer the mixed solution to a hydrothermal reactor, heat at 98°C for 3h, and naturally cool to room temperature. Collect the precipitate by centrifugation or filtration, wash the precipitate with solvent deionized water, and obtain MOF-5 / graphene composite material after drying.

[0046] Comparative Example 1 This comparative example provides a modified TPE steering wheel cover, the specific structure of which is basically the same as that of Example 1, except that the only difference is the material used to prepare the elastic layer 2, specifically: The elastic layer 2 is made of a modified TPE material, which includes 70 parts by weight of SBS resin, 20 parts by weight of calcium carbonate powder, 6 parts by weight of γ-aminopropyltriethoxysilane and 12 parts by weight of tributyl citrate.

[0047] Comparative Example 2 This comparative example provides a modified TPE steering wheel cover, the specific structure of which is basically the same as that of Example 1, except that the only difference is the material used to prepare the elastic layer 2, specifically: The elastic layer 2 is made of a modified TPE material, which includes 70 parts by weight of SBS resin, 20 parts by weight of calcium carbonate powder, 6 parts by weight of γ-aminopropyltriethoxysilane, 2 parts by weight of a composite antioxidant and 12 parts by weight of tributyl citrate.

[0048] The composite antioxidant is a main antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and an auxiliary antioxidant tris[2,4-di-tert-butylphenyl] phosphite, and the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:2.

[0049] Comparative Example 3 This comparative example provides a modified TPE steering wheel cover, the specific structure of which is basically the same as that of Example 1, except that the only difference is the material used to prepare the elastic layer 2, specifically: The elastic layer 2 is made of a modified TPE material, which includes 70 parts by weight of SBS resin, 20 parts by weight of calcium carbonate powder, 6 parts by weight of γ-aminopropyltriethoxysilane, 2 parts by weight of a composite antioxidant and 12 parts by weight of tributyl citrate.

[0050] The composite antioxidant is a metal organic framework material loaded with a main antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and an auxiliary antioxidant tris[2,4-di-tert-butylphenyl] phosphite, the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:2, and the preparation method of the composite antioxidant is: The primary antioxidant and the auxiliary antioxidant are added to acetone to dissolve, and then the metal organic framework composite material is added, mixed evenly, heated to 50° C. for reaction for 4 hours, filtered to remove the solvent, and dried to obtain a composite antioxidant.

[0051] Among them, the metal organic framework material is MOF-5.

[0052] Application Example 1 The modified TPE material provided in Example 3 is used as test material 1; The modified TPE material provided in Comparative Example 1 is used as Test Material 2; The modified TPE material provided in Comparative Example 2 is used as Test Material 3; The modified TPE material provided in Comparative Example 3 is used as Test Material 4; Test materials 1-4 were subjected to heat aging tests according to the test steps recorded in the national standard GB / T 3512-2014, and the changes in the appearance and odor of the different materials after heat aging for 24h, 48h and 120h were recorded. The results are shown in the following table:

[0053] Result analysis: By comparing test materials 1-4, it can be seen that the modified TPE material provided by the present invention has a long-lasting and stable antioxidant ability, is not easy to produce odor during long-term use, and achieves the intended purpose of the present invention.

[0054] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0055] Although the terms such as outer layer 1, elastic layer 2, accommodating cavity 3, opening 4, hollow groove 5, suction cup fixing member 6, pressing spring 60, fixing seat 61, suction cup 62, limiting assembly 63, first limiting convex eave 64, second limiting convex eave 65, short limiting convex eave 66, long limiting convex eave 67, annular positioning groove 68, annular positioning convex eave 69 are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A modified TPE steering wheel cover with good elasticity and no odor, comprising an outer layer (1) and an elastic layer (2) fixedly connected to the inner part of the outer layer (1), the outer layer (1) and the elastic layer (2) both present a hollow annular structure, a receiving cavity (3) for receiving the steering wheel is located inside the elastic layer (2), openings (4) are provided at corresponding positions on one side surface of the outer layer (1) and the elastic layer (2), the opening (4) is connected to the receiving cavity (3), and the characteristics are: The surface of the elastic layer (2) is also provided with a hollow groove (5) penetrating the side wall of the elastic layer (2); the hollow groove (5) is in the shape of an elongated strip, and a plurality of hollow grooves (5) are evenly arranged in the circumferential direction of the axis of the elastic layer (2).

2. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 1, characterized in that: A plurality of suction cup fixing members (6) for fixing the elastic layer (2) to the steering wheel are also provided in the accommodating cavity (3), and one end of the suction cup fixing member (6) is fixedly connected to the inner surface of the elastic layer (2).

3. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 2, characterized in that: The suction cup fixing member (6) comprises a fixing seat (61) fixedly connected to the inner surface of the elastic layer (2) and a suction cup (62) movably connected to the fixing seat (61), and a limiting component (63) is provided between the fixing seat (61) and the suction cup (62).

4. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 3, characterized in that: The limiting assembly (63) comprises a first limiting convex eave (64) fixedly connected to the inner side surface of the fixing seat (61) and a second limiting convex eave (65) fixedly connected to the side surface of the end of the suction cup (62), the second limiting convex eave (65) being pressed onto the first limiting convex eave (64), at least two first limiting convex eaves (64) being provided and being arranged in sequence along the axis direction of the fixing seat (61), and the distance between two adjacent first limiting convex eaves (64) being 3-10 mm.

5. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 4, characterized in that: The first limiting convex eaves (64) are provided with two, namely a short limiting convex eaves (66) and a long limiting convex eaves (67). The short limiting convex eaves (66) are closer to the bottom of the fixing seat (61) than the long limiting convex eaves (67). The long limiting convex eaves (67) are provided with an annular positioning convex eaves (69) on one side surface close to the second limiting convex eaves (65). The second limiting convex eaves (65) are provided with an annular positioning groove (68) recessed toward the inside of the second limiting convex eaves (65). The sliding suction cup (62) can make the annular positioning convex eaves (69) embedded in the annular positioning groove (68). The annular positioning groove (68) is closer to the axis of the fixing seat (61) than the end of the short limiting convex eaves (66).

6. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 3, characterized in that: The suction cup fixing member (6) further comprises a compression spring (60), one end of the compression spring (60) being connected to the bottom of the fixing seat (61), and the other end being connected to the end of the suction cup (62), and the compression spring (60) being in a compressed state.

7. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 1, characterized in that: The elastic layer (2) is made of a modified TPE material, wherein the modified TPE material comprises 60-80 parts by weight of SBS resin, 10-30 parts by weight of calcium carbonate powder, 2-10 parts by weight of γ-aminopropyltriethoxysilane, 0.5-3 parts by weight of a composite antioxidant, and 5-20 parts by weight of tributyl citrate.

8. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 7, characterized in that: The modified TPE material comprises 70 parts by mass of SBS resin, 20 parts by mass of calcium carbonate powder, 6 parts by mass of gamma-aminopropyltriethoxysilane, 2 parts by mass of composite antioxidant and 12 parts by mass of tributyl citrate.

9. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 7, characterized in that: The composite antioxidant is a metal organic framework composite material loaded with a main antioxidant tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester and an auxiliary antioxidant tris[2,4-di-tert-butylphenyl] phosphite, the mass ratio of the main antioxidant to the auxiliary antioxidant is 1:2, and the preparation method of the composite antioxidant is: The primary antioxidant and the auxiliary antioxidant are added to acetone to dissolve, and then the metal organic framework composite material is added, mixed evenly, heated to 40-60° C. for reaction for 2-6 hours, filtered to remove the solvent, and dried to obtain a composite antioxidant.

10. The modified TPE steering wheel cover with good elasticity and no odor as claimed in claim 9, characterized in that: The metal organic framework composite material is a MOF-5 / graphene composite material, and is prepared by the following method: Step 1: prepare graphene dispersion, disperse graphene powder in DMF solvent, and perform ultrasonic treatment to make it evenly dispersed; Step 2: Prepare MOF-5 precursor solution, dissolve Zn(NO3)2·6H2O and terephthalic acid in DMF solvent, and the molar ratio of Zn(NO3)2·6H2O to terephthalic acid is 4:3-5:1; Step 3: Preparation of finished product: evenly mix the graphene dispersion prepared in step 1 and the MOF-5 precursor solution prepared in step 2, transfer the mixed solution to a hydrothermal reactor, heat at 95-100°C for 2-4h, cool naturally to room temperature, collect the precipitate by centrifugation or filtration, wash the precipitate with solvent deionized water, and obtain a MOF-5 / graphene composite material after drying.

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