TPE automobile foot mat capable of continuously and autonomously releasing negative air ions and high in wear resistance and preparation method of TPE automobile foot mat

Abstract

The invention relates to the technical field of polymer composite materials. The invention provides a TPE automobile foot mat capable of continuously and autonomously releasing negative air ions and high in wear resistance. The TPE automobile foot mat comprises the following components in parts by weight: 30-40 parts of SEBS, 10-20 parts of PP, 20-30 parts of naphthenic oil, 10-15 parts of nano talcum powder and 4-8 parts of negative ion composite functional powder. The invention further provides a preparation method of the TPE automobile foot mat capable of continuously and autonomously releasing the negative air ions and high in wear resistance. According to the TPE automobile foot mat capable of continuously and autonomously releasing the air negative ions and high in wear resistance, through the synergistic effect of the added negative ion compound functional additive, the high-concentration air negative ions can be autonomously released on the surface of the TPE foot mat material, and the release duration cannot be rapidly attenuated due to instability of the negative ions; by adding the negative ion ceramic powder and the nanoscale talcum powder, under the action of the SEBS-MAH compatilizer, the interface compatibility is improved, and the wear resistance of the foot pad is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of polymer composite materials, and in particular relates to a TPE car floor mat that can sustainably and autonomously release negative air ions and is highly wear-resistant, and a preparation method thereof. Background Art

[0002] The primary function of car floor mats is to protect vehicle carpets from daily wear and tear, as well as stains and moisture, while providing passengers with a comfortable feel and non-slip safety. Existing materials are typically made from PVC, synthetic rubber, and synthetic cellulose. However, PVC can release harmful substances at high temperatures, rubber can sometimes have a strong, irritating odor, and synthetic fibers have poor water resistance and slip resistance. These materials have significant performance limitations, limiting their widespread application.

[0003] TPE (thermoplastic elastomer) material is a new type of environmentally friendly material with the advantages of being non-toxic, odorless, excellent crack resistance, high elasticity, and easy to clean. In recent years, it has been increasingly used in car floor mats.

[0004] Modern consumers have high standards for in-car air quality and hope to add more functionality to conventional TPE floor mats. For example, they hope to achieve the goal of enabling the TPE floor mat material to independently and sustainably generate a certain concentration of negative air ions, thereby achieving the functions of a comfortable, non-slip, and wear-resistant floor mat while also improving in-car air quality and providing a good in-car air environment.

[0005] Chinese patent CN118185327A discloses a wear-resistant matte TPE foot pad and its preparation method. The mat comprises the following raw materials: SEBS, PP, naphthenic white oil, modified vermiculite, modified molybdenum disulfide, nano-titanium dioxide, nano-calcium carbonate, modified microcrystalline kaolinite, an antioxidant, and a plasticizer. The invention incorporates modified vermiculite. During the preparation process, the modified vermiculite microparticles expand upon heating, filling gaps within the material and improving the pad's density and mechanical properties. The modified vermiculite gradually emerges from the surface, enhancing the matte's matte effect. The addition of modified microcrystalline kaolinite imparts a stable porous structure to the surface, improving its binding ability and enabling uniform nanoscale dispersion, further enhancing the matte effect. The patent does not mention components or content that can simultaneously release negative air ions. Furthermore, the modified powder used is complex to prepare and is costly, making it difficult to commercialize.

[0006] Chinese patent CN118652562A discloses a TPE composite material capable of continuously releasing negative ions and its preparation method. The composite material comprises 60-90 parts of a TPE elastomer, 5-15 parts of modified carbon black, 5-15 parts of modified negative ion powder, and 1-2 parts of a lubricant. The modified carbon black preparation method comprises mixing carbon black with a nitrogen source and calcining it under a protective gas atmosphere to produce nitrogen-doped carbon black; and then mixing the nitrogen-doped carbon black, a soluble zinc salt, a structure-adjusting agent, and water, followed by a hydrothermal reaction to produce the modified carbon black. The present invention involves nitrogen-doping the carbon black and then surface-modifying it with zinc oxide to produce the modified carbon black. This modified carbon black enhances the interaction with the TPE material, improving the mechanical properties of the TPE material to a certain extent. The introduction of zinc oxide also imparts excellent antibacterial properties to the TPE material. The negative ion powder is then refluxed in an organic solvent containing a silane coupling agent to produce the modified negative ion powder, enhancing its interaction with the TPE material. However, the patent does not address how to simultaneously achieve high wear resistance.

[0007] So far, there has been no report on a technology that can achieve both high wear resistance and sustainable, autonomous release of a certain concentration of negative air ions on ordinary TPE materials. Summary of the Invention

[0008] Based on this, the purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a TPE car floor mat that can continuously and autonomously release negative air ions and is highly wear-resistant, and a preparation method thereof. The present invention provides a TPE car floor mat that can continuously and autonomously release negative air ions and is highly wear-resistant, which improves the wear resistance of the floor mat and continuously and autonomously releases negative air ions.

[0009] In order to solve the above problems, the present invention provides the following technical solutions: A TPE car floor mat that continuously and autonomously releases negative air ions and is highly wear-resistant comprises the following ingredients in parts by weight: 30-40 parts SEBS, 10-20 parts PP, 20-30 parts naphthenic oil, 10-15 parts nano-talc, and 4-8 parts negative ion composite functional powder. Preferably, a TPE car floor mat that continuously and autonomously releases negative air ions and is highly wear-resistant comprises the following ingredients in parts by weight: 30-35 parts SEBS, 10-15 parts PP, 23-25 ​​parts naphthenic oil, 15 parts nano-talc, and 4-6 parts negative ion composite functional powder. In the present invention, SEBS is a styrene-ethylene-butylene-styrene copolymer, and PP is polypropylene.

[0010] The TPE car floor mats described above are capable of sustainably and autonomously releasing negative air ions and are highly wear-resistant. The negative ion composite functional powder is mainly prepared from the following raw materials in parts by weight: 70-80 parts of a main release agent, 10-15 parts of a release aid, and 10-15 parts of a release attenuation compensating aid. Preferably, the negative ion composite functional powder is mainly prepared from the following raw materials in parts by weight: 75 parts of a main release agent, 15 parts of a release aid, and 10 parts of a release attenuation compensating aid.

[0011] In the above-mentioned TPE car floor mat that releases negative air ions sustainably and autonomously and is highly wear-resistant, the main releasing agent is selected from any one of iron tourmaline, ferromagnesian tourmaline, lithium tourmaline, magnesium tourmaline, and sodium manganese tourmaline, or a mixture of more thereof. Preferably, the main releasing agent is selected from iron tourmaline or ferromagnesian tourmaline.

[0012] In the aforementioned TPE car floor mats that sustainably and autonomously release negative air ions and are highly wear-resistant, the release aid is selected from any one of expanded graphite, zeolite powder, diatomaceous earth, activated carbon, and MOFs, or a mixture thereof. Preferably, the release aid is selected from a mixture of expanded graphite and diatomaceous earth, with the weight ratio of the expanded graphite to the diatomaceous earth being 1:1.

[0013] As described above, the TPE car floor mat that releases air negative ions sustainably and autonomously and is highly wear-resistant, the release attenuation compensating aid is selected from any one of rare earth negative ion powder, phosphate cerium lanthanum ore powder, fluorocarbon cerium ore powder, water-soluble negative ion powder, and UV absorber, or a mixture of more. Preferably, the release attenuation compensating aid is selected from any one of rare earth negative ion powder, phosphate cerium lanthanum ore powder, and water-soluble negative ion powder, or a mixture of any two of them. Further preferably, the release attenuation compensating aid is selected from a mixture of rare earth negative ion powder and phosphate cerium lanthanum ore powder, and the weight ratio of the rare earth negative ion powder and phosphate cerium lanthanum ore powder is 1:1. Optionally, the release attenuation compensating aid is selected from a mixture of water-soluble negative ion powder and phosphate cerium lanthanum ore powder, and the weight ratio of the water-soluble negative ion powder and phosphate cerium lanthanum ore powder is 1:1.

[0014] The TPE car floor mat that releases negative air ions sustainably and autonomously and is highly wear-resistant as described above further comprises the following ingredients in parts by weight: 2 to 4 parts of negative ion ceramic powder. Preferably, the negative ion ceramic powder is 2 to 3 parts.

[0015] The above-described TPE car floor mat, which sustainably releases negative air ions and is highly wear-resistant, further comprises the following components in parts by weight: 1 to 3 parts of a compatibilizer. The compatibilizer is selected from any one or a mixture of SEBS-MAH, POE-g-MAH, EPDM-g-MAH, TPU-g-AA, and PE-g-AM. Preferably, the compatibilizer is selected from SEBS-MAH (styrene-ethylene butylene-styrene grafted with maleic anhydride).

[0016] The TPE car floor mat described above, which sustainably releases negative air ions and is highly wear-resistant, further comprises the following components in parts by weight: 1 to 3 parts of a first wear-resistant agent and 2 to 3 parts of a second wear-resistant agent; the first wear-resistant agent is selected from any one of PTFE and UHMWPE; and the second wear-resistant agent is selected from any one of silicone masterbatch, molybdenum disulfide, and graphite. Preferably, the first wear-resistant agent is selected from PTFE, and the second wear-resistant agent is selected from silicone masterbatch.

[0017] The TPE car floor mats that release negative air ions sustainably and autonomously and are highly wear-resistant as described above further include the following ingredients in parts by weight: 1 to 2 parts of other additives. Preferably, the other additives include antioxidants, UV light stabilizers, lubricants, etc. Preferably, the antioxidant is selected from any one of antioxidant 1010 and antioxidant 168. Further preferably, the antioxidant is selected from antioxidant 1010. Preferably, the UV light stabilizer is selected from any one of UV-531 and UV-327. Further preferably, the UV light stabilizer is selected from UV-531. Preferably, the lubricant is selected from any one of calcium stearate, zinc stearate, and stearic acid. Further preferably, the lubricant is selected from zinc stearate.

[0018] Based on the same inventive concept, the present invention provides a method for preparing the above-mentioned TPE car floor mat that can sustainably and autonomously release negative air ions and is highly wear-resistant, comprising the following steps: S1. Preparation of negative ion composite functional powder; In this step, the negative ion composite functional powder comprises the following components in parts by weight: 70 to 80 parts of a main release agent, 10 to 15 parts of a release aid, and 10 to 15 parts of an attenuation compensating aid; The specific preparation method is as follows: (1) Grinding the raw material components of the attenuation compensating agent by mechanical mixing according to a set ratio to prepare the attenuation compensating agent; (2) According to the set ratio, the attenuation compensation agent, main release agent and release aid prepared in step (1) are added to a high-speed mixer and mixed to obtain a mixture, namely, the negative ion composite functional powder.

[0019] S2. Add SEBS, PP, nano-talc, negative ion composite functional powder, negative ion ceramic powder, compatibilizer, first wear-resistant agent, second wear-resistant agent, and other additives to a stirring pot in sequence according to the set ratio. After stirring at a low speed of 40 to 80 rpm for 15 to 30 minutes, add cyclopentane oil, increase the speed to 100 to 150 rpm and stir for 1 to 2 hours. Add the stirred mixture to a twin-screw extruder for extrusion and plasticization at an extrusion temperature of 130 to 200°C. The extruded material is water-cooled and granulated, sieved, and ventilated and dried to obtain a TPE car mat material that can sustainably release negative air ions and is highly wear-resistant. S3. The TPE car floor mat material that releases negative air ions sustainably and autonomously and is highly wear-resistant as described in step S2 is extruded into a sheet through a single-screw extruder at an extrusion temperature of 150 to 220° C. and is vacuum-formed to obtain the TPE car floor mat that releases negative air ions sustainably and autonomously and is highly wear-resistant.

[0020] Compared with the existing technology, the effects and advantages of the present invention are: 1. The present invention achieves the synergistic effect of adding negative ion composite functional powder, which can release high concentration of air negative ions on the surface of TPE foot pad material, up to 5300-6100 / cm 3 The mass results of the air negative ion release are as follows, and the release duration does not decay rapidly due to the instability of the negative ions, thus achieving the purpose of practical application. In addition, the present invention improves the interface compatibility and the wear resistance of the foot pad by adding negative ion ceramic powder and nano-grade talc powder under the action of SEBS-MAH compatibilizer.

[0021] 2. The present invention provides a TPE car mat that can sustainably release negative air ions and is highly wear-resistant. The wear rate is less than 3.0%, and the amount of negative air ions released after 4 hours is 5300-6100 / cm 3 After 10 years, the attenuation value of the air negative ion release is 8.4-9.8%. This shows that the TPE car floor mats prepared by the present invention have good wear resistance, can maintain good physical state and appearance quality during long-term use, and significantly improve the air quality in the car. Especially after 10 years of simulated long-term use, the TPE car floor mats can continuously and effectively release air negative ions, reflecting excellent stability and durability. DETAILED DESCRIPTION

[0022] The following will be combined with the contents of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used in this specification have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are intended solely for the purpose of describing specific embodiments and are not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0024] Unless otherwise specified, the experimental methods used in the following examples are conventional methods.

[0025] Some of the raw materials used in the examples and comparative examples of the present invention are described as follows: SEBS, model: 6151, purchased from Taiwan Rubber Co., Ltd.; Polypropylene (PP), model: 1100NK, purchased from Dongguan Jieyuanxing Plastic Co., Ltd.; Naphthenic oil was purchased from Hebei Yisaiyuan Lubricant Co., Ltd. Nano-talc powder, purchased from Guangdong Nao New Material Technology Co., Ltd., with an average particle size of 30 nm; Rare earth anion powder, purchased from Shanghai Annao Environmental Technology Co., Ltd., 600 mesh; Water-soluble negative ion powder, purchased from Dongguan Yanteng Negative Ion Technology Co., Ltd., 800 mesh; Phosphorus cerium lanthanum ore powder, purchased from Lingshou County Yixuan Mineral Products Processing Plant, 200 mesh; Ferro-tourmaline, ferro-magnesium tourmaline, and negative ion ceramic powder were purchased from Shijiazhuang Tourmaline Mineral Products Co., Ltd., 800 mesh; Expanded graphite, model: KP32, purchased from Qingdao Tianshengda Graphite Co., Ltd. Diatomaceous earth, model: C05, purchased from Jilin Yuantong Mining Co., Ltd. SEBS-MAH, model: KT25, purchased from Shenyang Ketong Plastic Co., Ltd.; PTFE was purchased from Dongguan Renji Plastic Products Co., Ltd. Silicone masterbatch, model: KJ-B01, purchased from Hangzhou Kaijie Plastic Technology Co., Ltd. UV-531 was purchased from Changzhou Youfeng Chemical Co., Ltd.; Antioxidant 1010 was purchased from BASF SE.

[0026] Unless otherwise specified, the materials and reagents used in the examples are commercially available. The foregoing description is provided solely to illustrate the present invention and is not to be construed as a strict limitation of the present invention. Those skilled in the art can purchase or prepare the same or similar raw materials commercially. These details will not be further detailed in the examples.

[0027] Example 1: A TPE car floor mat that can sustainably and autonomously release negative air ions and is highly wear-resistant comprises the following ingredients in parts by weight: 30 parts of SEBS, 15 parts of PP, 23 parts of naphthenic oil, 15 parts of nano-talc, 6 parts of negative ion composite functional powder, 3 parts of negative ion ceramic powder, 2 parts of SEBS-MAH, 2 parts of PTFE, 2 parts of silicone masterbatch, 1 part of antioxidant 1010, 0.5 part of light stabilizer UV-531, and 0.5 part of zinc stearate.

[0028] The present embodiment provides a TPE car mat that can sustainably and autonomously release negative air ions and is highly wear-resistant, and is prepared according to the following preparation method: S1. Preparation of negative ion composite functional powder. In this step, the negative ion composite functional powder comprises the following components in parts by weight: 75 parts of a main release agent, 15 parts of a release aid, and 10 parts of an attenuation compensating aid; the specific preparation method is as follows: (1) According to a set ratio, the raw material components of the attenuation compensating agent are ground by mechanical mixing to prepare the attenuation compensating agent; in this embodiment, the attenuation compensating agent is selected from a mixture of rare earth anion powder and phosphorus cerium lanthanum ore powder, and the weight ratio of the rare earth anion powder to the phosphorus cerium lanthanum ore powder is 1:1.

[0029] (2) According to the set ratio, the attenuation compensation agent, the main release agent, and the release aid prepared in step (1) are added to a high-speed mixer and mixed to obtain a mixture, i.e., the negative ion composite functional powder; in this embodiment, the main release agent is selected from tourmaline; the release aid is selected from a mixture of expanded graphite and diatomaceous earth, and the weight ratio of the expanded graphite to the diatomaceous earth is 1:1.

[0030] S2. SEBS, PP, nano-talc, negative ion composite functional powder, negative ion ceramic powder, SEBS-MAH, PTFE, silicone masterbatch, antioxidant 1010, light stabilizer UV-531, and zinc stearate were added to a stirring pot in the prescribed ratio. After stirring at 60 rpm for 20 minutes, naphthenic oil was added, and the speed was increased to 120 rpm and stirred for 1.5 hours. The stirred mixture was added to a twin-screw extruder for plasticization at an extrusion temperature of 180°C. The extruded material was water-cooled and granulated, sieved, and dried through ventilation to obtain a TPE car floor mat material that can sustainably release negative air ions and is highly wear-resistant. S3. The TPE car floor mat material that releases negative air ions sustainably and autonomously and is highly wear-resistant as described in step S2 is extruded into a sheet through a single-screw extruder at an extrusion temperature of 200° C. and is vacuum-formed to obtain the TPE car floor mat that releases negative air ions sustainably and autonomously and is highly wear-resistant.

[0031] Example 2: A TPE car floor mat that can sustainably and autonomously release negative air ions and is highly wear-resistant comprises the following ingredients in parts by weight: 35 parts of SEBS, 10 parts of PP, 25 parts of naphthenic oil, 15 parts of nano-talc, 4 parts of negative ion composite functional powder, 3 parts of negative ion ceramic powder, 2 parts of SEBS-MAH, 2 parts of PTFE, 2 parts of silicone masterbatch, 1 part of antioxidant 1010, 0.5 part of light stabilizer UV-531, and 0.5 part of zinc stearate.

[0032] The present embodiment provides a TPE car mat that can sustainably and autonomously release negative air ions and is highly wear-resistant, and is prepared according to the following preparation method: S1. Preparation of negative ion composite functional powder. In this step, the negative ion composite functional powder comprises the following components in parts by weight: 75 parts of a main release agent, 15 parts of a release aid, and 10 parts of an attenuation compensating aid; the specific preparation method is as follows: (1) According to a set ratio, the raw material components of the attenuation compensating agent are ground by mechanical mixing to prepare the attenuation compensating agent; in this embodiment, the attenuation compensating agent is selected from a mixture of rare earth anion powder and phosphorus cerium lanthanum ore powder, and the weight ratio of the rare earth anion powder to the phosphorus cerium lanthanum ore powder is 1:1.

[0033] (2) According to the set ratio, the attenuation compensation agent, the main release agent, and the release aid prepared in step (1) are added to a high-speed mixer and mixed to obtain a mixture, i.e., the negative ion composite functional powder; in this embodiment, the main release agent is selected from tourmaline; the release aid is selected from a mixture of expanded graphite and diatomaceous earth, and the weight ratio of the expanded graphite to the diatomaceous earth is 1:1.

[0034] S2. SEBS, PP, nano-talc, negative ion composite functional powder, negative ion ceramic powder, SEBS-MAH, PTFE, silicone masterbatch, antioxidant 1010, light stabilizer UV-531, and zinc stearate were added to a stirring pot in the prescribed ratio. After stirring at 80 rpm for 15 minutes, naphthenic oil was added, the speed was increased to 100 rpm, and stirring was continued for 1.5 hours. The stirred mixture was added to a twin-screw extruder for plasticization at an extrusion temperature of 150°C. The extruded material was water-cooled and granulated, sieved, and dried through ventilation to obtain a TPE car floor mat material that can sustainably release negative air ions and is highly wear-resistant. S3. The TPE car floor mat material that releases negative air ions sustainably and autonomously and is highly wear-resistant as described in step S2 is extruded into a sheet through a single-screw extruder at an extrusion temperature of 210° C. and is vacuum-formed to obtain the TPE car floor mat that releases negative air sustainably and autonomously and is highly wear-resistant.

[0035] Example 3: A TPE car floor mat that can sustainably and autonomously release negative air ions and is highly wear-resistant comprises the following ingredients in parts by weight: 30 parts of SEBS, 15 parts of PP, 23 parts of naphthenic oil, 15 parts of nano-talc, 6 parts of negative ion composite functional powder, 2 parts of negative ion ceramic powder, 1 part of SEBS-MAH, 3 parts of PTFE, 3 parts of silicone masterbatch, 1 part of antioxidant 1010, 0.5 part of light stabilizer UV-531, and 0.5 part of zinc stearate.

[0036] The present embodiment provides a TPE car mat that can sustainably and autonomously release negative air ions and is highly wear-resistant, and is prepared according to the following preparation method: S1. Preparation of negative ion composite functional powder. In this step, the negative ion composite functional powder comprises the following components in parts by weight: 75 parts of a main release agent, 15 parts of a release aid, and 10 parts of an attenuation compensating aid; the specific preparation method is as follows: (1) According to a set ratio, the raw material components of the attenuation compensating agent are ground by mechanical mixing to prepare the attenuation compensating agent; in this embodiment, the attenuation compensating agent is selected from a mixture of rare earth anion powder and phosphorus cerium lanthanum ore powder, and the weight ratio of the rare earth anion powder to the phosphorus cerium lanthanum ore powder is 1:1.

[0037] (2) According to the set ratio, the attenuation compensation agent, the main release agent, and the release aid prepared in step (1) are added to a high-speed mixer and mixed to obtain a mixture, i.e., the negative ion composite functional powder; in this embodiment, the main release agent is selected from tourmaline; the release aid is selected from a mixture of expanded graphite and diatomaceous earth, and the weight ratio of the expanded graphite to the diatomaceous earth is 1:1.

[0038] S2. SEBS, PP, nano-talc, negative ion composite functional powder, negative ion ceramic powder, SEBS-MAH, PTFE, silicone masterbatch, antioxidant 1010, light stabilizer UV-531, and zinc stearate were added to a stirring pot in the prescribed ratio. After stirring at 40 rpm for 30 minutes, naphthenic oil was added, the speed was increased to 100 rpm, and stirring was continued for 1.5 hours. The stirred mixture was added to a twin-screw extruder for plasticization at an extrusion temperature of 200°C. The extruded material was water-cooled and granulated, sieved, and dried through ventilation to obtain a TPE car floor mat material that can sustainably release negative air ions and is highly wear-resistant. S3. The TPE car floor mat material that releases negative air ions sustainably and autonomously and is highly wear-resistant as described in step S2 is extruded into a sheet through a single-screw extruder at an extrusion temperature of 220° C. and is vacuum-formed to obtain the TPE car floor mat that releases negative air sustainably and autonomously and is highly wear-resistant.

[0039] Example 4: The difference between this embodiment and embodiment 1 is that in the step of "S1. Preparing negative ion composite functional powder", the attenuation compensation auxiliary agent is selected from a mixture of water-soluble negative ion powder and phosphorus cerium lanthanum mineral powder, and the weight ratio of the water-soluble negative ion powder to the phosphorus cerium lanthanum mineral powder is 1:1.

[0040] Example 5: The difference between this embodiment and embodiment 1 is that in the step of "S1. Preparing negative ion composite functional powder", the main releasing agent is selected from ferromagnesian tourmaline.

[0041] Comparative Example 1: This comparative example differs from Example 1 in that no negative ion ceramic powder is added, and the composition content of the TPE car mat is adjusted. This comparative example provides a TPE car mat that sustainably releases negative air ions and is highly wear-resistant, comprising the following ingredients by weight: 30 parts SEBS, 15 parts PP, 23 parts naphthenic oil, 16 parts nano-talc, 8 parts negative ion composite functional powder, 2 parts SEBS-MAH, 2 parts PTFE, 2 parts silicone masterbatch, 1 part antioxidant 1010, 0.5 part light stabilizer UV-531, and 0.5 part zinc stearate.

[0042] Comparative Example 2: This comparative example differs from Example 1 in that, in step "S1. Preparing Negative Ion Composite Functional Powder," no attenuation compensating agent is added, and the content of the negative ion composite functional powder ingredients is adjusted. The negative ion composite functional powder provided in this comparative example comprises the following ingredients, in parts by weight: 80 parts of a primary release agent and 20 parts of a release aid.

[0043] Comparative Example 3: This comparative example differs from Example 1 in that, in step "S1. Preparing Negative Ion Composite Functional Powder," no release aid is added, and the content of the negative ion composite functional powder ingredients is adjusted. The negative ion composite functional powder provided in this comparative example comprises the following ingredients, in parts by weight: 80 parts of a primary release agent and 20 parts of an attenuation compensating agent.

[0044] The TPE foot pad materials prepared in Examples 1 to 5 and Comparative Examples 1 to 3 were tested for tensile strength, elongation at break, wear rate, hardness, density, and melt index, respectively.

[0045] The wear rate test is as follows: the obtained foot pads of Examples 1 to 5 and Comparative Examples 1 to 3 are fixed on a wear resistance testing instrument under the same conditions and scraped. After rubbing 200 times, the wear rate is measured.

[0046] Since the negative ion release of the prepared composite material tends to be stable after 4 hours, the air negative ion release of the TPE foot pad material was tested 4 hours later.

[0047] 1. Determination of air negative ion release after 4 hours 1. After fully charging the negative ion detector, turn it on, adjust it to zero, and place it vertically on a level table. Let it sit for ten minutes until the machine operates normally.

[0048] 2. Place the airtight box upside down on the negative ion detector to create a closed environment simulating the situation inside a car. Ensure that there is light. Let it stand for 30 minutes. After the airflow in the box is stable and the readings are uniform (the error of five consecutive readings is no more than 10%), read the value on the instrument ten times in a row. P 0,1 -P 0,10 Its average value , which is the original negative ion concentration in the air, the unit is (pieces / cm 3 ).

[0049] 3. Lift the sealed box and keep the air flowing for 1 min. m Place the sample to be tested on a tray or weighing paper with the largest surface facing upward. If it is a granular material, spread it out as flat as possible. Place the prepared sample 10 cm away from the tester and cover both the tester and the sample with a sealed box.

[0050] 4. Wait for 30 minutes until the airflow in the box is stable and the readings are uniform (the error of five consecutive readings is no more than 10%), and then read the values ​​on the recording instrument ten times in a row. P A,1 -P A,10 Calculate the average value .but For quality m The negative ion concentration of sample A in the air in a closed space of (L×W×H) is (unit: / cm 3 ).

[0051] The negative ion concentration induced by a unit mass of sample A in a unit closed space is calculated according to formula (1), and the result is the arithmetic mean of 5 samples.

[0052]

[0053] Where: N——Negative ion concentration induced by the sample in the air, unit: (unit: / cm 3 ); - The negative air ion reading after the test sample is placed in the test environment; ——Negative ion reading in the original air of the test environment without any test sample placed in it; m——mass of the test sample, in grams (g); L - length inside the test chamber, in millimeters (mm); W - width of the test chamber, in millimeters (mm); H is the height of the test chamber, in millimeters (mm).

[0054] 1 kg of sample was sampled for Example 1 to Example 5 and Comparative Examples 1 to 3. Five samples were tested in each group in a 0.5 cubic space. The arithmetic mean was taken to obtain the amount of negative air ions released.

[0055] 2. 10-year release attenuation value detection The negative ion release efficiency of the sample was measured at room temperature for a long time, and the release attenuation value within 10 years was calculated according to the following principle.

[0056]

[0057] Where, C: percentage of main release agent D: Percentage of released additive E: Percentage of attenuation compensation additive Day: number of days This section describes the effects of the primary release agent (C) and the release-attenuation compensating agent (E) in the composite material. The primary release agent generally increases the generation and release of negative air ions, while the release-attenuation compensating agent helps mitigate the decay of negative air ion release over time. This item shows that the release-attenuation compensating agent has twice the impact of the primary release agent, meaning that E contributes more than twice as much to the release amount as C. This reflects the key role of the release-attenuation compensating agent in composite materials, particularly in counteracting the effects of time.

[0058] This section reflects the negative impact of the release aid (D) on the release of negative air ions. As the release aid content increases, the release amount shows a negative correlation. This is because the addition of the release aid affects the stability or release process of negative air ions, thereby reducing the effective release amount. In formulation design, the appropriate amount of release aid needs to be balanced to avoid adversely affecting overall performance.

[0059] : This item describes the decay of negative air ion release over time (days). Over time, the release of negative air ions decreases, and the rate of decay is proportional to the logarithm of time. e^6.6 is a decay constant that determines the decay rate. A logarithmic decay model is used here, indicating a rapid initial release followed by a gradual slowing of the decay rate over time. This decay behavior reflects the stability of negative air ion release and the performance degradation of the composite material over time.

[0060] 10-year release attenuation value (%) = (1-10th year air negative ion release / initial release) × 100% The test reference standards and results of Examples 1 to 5 and Comparative Examples 1 to 3 are shown in Table 1.

[0061] Table 1 Test results of Examples 1 to 5 and Comparative Examples 1 to 3

[0062] As can be seen from Table 1, the comprehensive performance of Examples 1 to 5 is better than that of Comparative Examples 1 to 3.

[0063] Among them, compared with Example 1, Comparative Example 1 does not add negative ion ceramic powder, and its wear rate increases, hardness decreases, and melt index increases, indicating that the addition of negative ion ceramic powder in the present invention not only helps to increase the amount of negative ion release, but also improves the wear resistance of the product.

[0064] Comparative Example 2 In the above step "S1. Preparation of negative ion composite functional powder", no attenuation compensation agent was added. Since the attenuation compensation agent played a role in the continuous release of negative ions, it can be seen from Table 1 that the air negative ion release in 4 hours was only 3200 / cm 3 , a decrease of 39.62% compared with Example 1; the attenuation value of the air negative ion release after 10 years was 76.3%, which is a serious attenuation. This shows that the addition of the attenuation compensating agent plays a key role in the long-term release of air negative ions. The addition of the attenuation compensating agent in the present invention can quickly offset the attenuation effect caused by the reaction between the high activity of negative ions and positive ions, thereby achieving the application effect of sustainable release of negative ions.

[0065] Comparative Example 3: In the above step "S1. Preparation of negative ion composite functional powder", no release aid was added. Compared with Example 1, the air negative ion release in 4 hours was only 1100 / cm 3 Moreover, the attenuation value of the air negative ion release after 10 years is 56.7%, indicating that the addition of release aids plays a key synergistic role in the release of negative ions.

[0066] The test results of Examples 1-5 and Comparative Examples 1-3 demonstrate that the TPE car floor mats prepared in the present invention exhibit high wear resistance and the excellent performance of sustained negative ion release. Specifically, the specific SEBS, PP, naphthenic oil, nano-talc, the negative ion composite functional powder prepared in the present invention, the negative ion ceramic powder, the compatibilizer, the first anti-wear agent, and the second anti-wear agent must be used in combination to achieve the overall material's comprehensive performance; substituting similar components will not achieve the excellent results of the present invention.

[0067] It should be noted that the specific embodiments are only representative examples of the present invention. Obviously, the technical solutions of the present invention are not limited to the above embodiments and may be subject to many variations. Those skilled in the art who are clear about the disclosure of the present invention or who can unambiguously derive the invention from the written description of the document should be considered to be within the scope of protection of this patent.

Claims

1. A TPE car mat that can release negative air ions sustainably and autonomously and is highly wear-resistant, characterized in that: The invention comprises the following components in parts by weight: 30-40 parts of SEBS, 10-20 parts of PP, 20-30 parts of naphthenic oil, 10-15 parts of nano talc powder and 4-8 parts of negative ion composite functional powder.

2. The TPE car floor mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 1, characterized in that: The negative ion composite functional powder is mainly prepared from the following raw materials in parts by weight: 70 to 80 parts of a main releasing agent, 10 to 15 parts of a releasing auxiliary agent, and 10 to 15 parts of a release attenuation compensating auxiliary agent.

3. The TPE car floor mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 2, characterized in that: The main releasing agent is selected from any one of iron tourmaline, ferromagnesium tourmaline, lithium tourmaline, magnesium tourmaline and sodium manganese tourmaline, or a mixture of multiple thereof.

4. The TPE car floor mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 2, characterized in that: The release aid is selected from any one of expanded graphite, zeolite powder, diatomaceous earth, activated carbon, and MOFs, or a mixture of multiple thereof.

5. The TPE car floor mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 2, characterized in that: The release attenuation compensating auxiliary agent is selected from any one of rare earth anion powder, cerium phosphate lanthanum ore powder, bastnaesite powder, water-soluble anion powder, and UV absorber, or a mixture of multiple thereof.

6. The TPE car floor mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 1, characterized in that: The invention also comprises the following ingredients in parts by weight: 2 to 4 parts of negative ion ceramic powder.

7. The TPE car mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 2, characterized in that: The invention also includes the following ingredients in parts by weight: 1 to 3 parts of a compatibilizer, wherein the compatibilizer is selected from any one of SEBS-MAH, POE-g-MAH, EPDM-g-MAH, TPU-g-AA, and PE-g-AM, or a mixture of multiple thereof.

8. The TPE car floor mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 2, characterized in that: It also includes the following components in parts by weight: 1 to 3 parts of a first wear-resistant agent and 2 to 3 parts of a second wear-resistant agent; the first wear-resistant agent is selected from any one of PTFE and UHMWPE; the second wear-resistant agent is selected from any one of silicone masterbatch, molybdenum disulfide and graphite.

9. The TPE car floor mat that can release negative air ions sustainably and autonomously and is highly wear-resistant according to claim 3, characterized in that: The invention also comprises the following components in parts by weight: 1 to 2 parts of other auxiliary agents.

10. A method for preparing the TPE car mat that can release negative air ions sustainably and autonomously and is highly wear-resistant as claimed in claim 9, characterized in that: The following steps are involved: S1. Preparation of negative ion composite functional powder; S2. Add SEBS, PP, nano-talc, negative ion composite functional powder, negative ion ceramic powder, compatibilizer, first wear-resistant agent, second wear-resistant agent, and other additives to a stirring pot in sequence according to the set ratio. After stirring at a low speed of 40 to 80 rpm for 15 to 30 minutes, add cyclopentane oil, increase the speed to 100 to 150 rpm and stir for 1 to 2 hours. Add the stirred mixture to a twin-screw extruder for extrusion and plasticization at an extrusion temperature of 130 to 200°C. The extruded material is water-cooled and granulated, sieved, and ventilated and dried to obtain a TPE car mat material that can sustainably release negative air ions and is highly wear-resistant. S3. The TPE car floor mat material that releases negative air ions sustainably and autonomously and is highly wear-resistant as described in step S2 is extruded into a sheet through a single-screw extruder at an extrusion temperature of 150 to 220° C. and is vacuum-formed to obtain the TPE car floor mat that releases negative air ions sustainably and autonomously and is highly wear-resistant.

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