Environment-friendly waterproof and dustproof sealing rubber strip material for anti-fog car lamp
An environmentally friendly, waterproof, and dustproof sealing strip material for automotive lights, which uses a hot-pressing process to encapsulate the outer layer material in the automotive sealing strip, solves the problem of reduced sealing strip performance in low-temperature environments. This material achieves improved sealing and cushioning performance, as well as enhanced waterproofing, dustproofing, and sound insulation effects in low-temperature environments.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-19
- Publication Date
- 2026-03-31
AI Technical Summary
Traditional automotive sealing strips harden in low-temperature environments, leading to a decrease in sealing and cushioning performance, affecting the driving experience, and significantly reducing their waterproof, dustproof, and sound insulation properties.
The sealing strip is made of environmentally friendly waterproof and dustproof sealing material for anti-fog car lights. The outer layer material is wrapped around the outer surface of the inner layer material through a hot pressing process. The inner layer material contains elastic fiber balls to provide an elastic network, while the outer material provides environmental protection and durability. The inner and outer layer materials are mixed in a specific ratio and processed to form the sealing strip.
It maintains good sealing and cushioning performance in low-temperature environments, improves waterproofing, dustproofing and sound insulation, and extends the service life of the sealing strip.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of automotive sealing strip material processing technology, specifically relating to environmentally friendly waterproof and dustproof sealing strip material for anti-fog car lights. Background Technology
[0002] Automotive sealing strips are elastic components installed at the joints of various automotive parts. They primarily serve to seal, insulate, waterproof, dustproof, and dampen vibrations. They are typically made of elastic materials such as rubber and plastic.
[0003] Traditional automotive weatherstripping is mostly made of rubber or plastic. In low-temperature winter environments, these materials harden, resulting in a significant decrease in their sealing and cushioning performance. Specifically, when installed on car doors, the impact force when closing the door increases, the feel is harsh, and it is accompanied by a sharp impact sound, seriously affecting the driving and riding experience. When installed on car windows, it can easily cause the glass to jam or operate poorly, and it also greatly reduces the waterproof, dustproof, and sound insulation performance. Summary of the Invention
[0004] The purpose of this invention is to provide an environmentally friendly waterproof and dustproof sealing strip material for anti-fog vehicle lights in order to solve the above-mentioned problems.
[0005] The present invention achieves the above objectives through the following technical solutions: This invention provides an environmentally friendly waterproof and dustproof sealing strip material for anti-fog vehicle lights. The waterproof and dustproof sealing strip material includes an inner layer material and an outer layer material. The outer layer material is coated onto the outer surface of the inner layer material by a hot-pressing process to form the waterproof and dustproof sealing strip material. By weight, the inner layer material is composed of 20-30 parts of elastic fiber balls, 80-85 parts of ethylene-ethyl acrylate, 3-5 parts of calcium carbonate, 2-4 parts of talc, 1-3 parts of zinc stearate, 1-2 parts of antioxidant 1076 and 2-6 parts of light stabilizer HALS-622. By weight, the outer layer material comprises 15-35 parts water-repellent microparticles, 75-85 parts ethylene-ethyl acrylate, 6-12 parts carbon black, 1-2 parts zinc oxide, 0.5-2 parts stearic acid, 6-12 parts liquid paraffin, 4-8 parts aluminum hydroxide, 0.5-1.5 parts dibenzothiazole disulfide, 4-7 parts 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane, 1-3 parts antioxidant UV-531, and 0.2-0.8 parts light stabilizer HALS-622; The elastic fiber balls are obtained by melt spinning a spinning solution into continuous fibers, cutting the continuous fibers, and then performing fiber balling treatment. The raw materials for preparing the spinning solution, by weight, include: 65-85 parts polyethylene granules, 3-6 parts titanium dioxide, 5-15 parts maleic anhydride-grafted polyethylene, 0.5-1 part glycyrrhizic acid, 3-6 parts zinc stearate, and 3-5 parts inulin. The raw materials for preparing the water-repellent microparticles, by weight, include: 30-45 parts hexadecyltrimethoxysilane, 2-4 parts potassium carbonate, 5-10 parts paraffin, 8-16 parts nano-silica, and 15-23 parts zinc borate.
[0006] As a further optimization of the present invention, the preparation process of the spinning solution is as follows: (a) Dry titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, and zinc stearate in an oven at 60-80℃ for 30 min. Mix polyethylene particles, titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, zinc stearate, and inulin at 10-15℃ and stir at 100 rpm for 10 min to obtain a premixed material. (ii) Stir the premixed material at 60 rpm for 10 min at 140-160℃ to obtain a uniform melt, and keep it at 150℃ to obtain the spinning solution.
[0007] As a further optimization of the present invention, the preparation process of the elastic fiber ball is as follows: (a) The spinning solution is fed into a melt spinning machine and extruded into a fine fiber stream through the micropores of the spinneret. After stretching and cooling to solidify, pre-made fibers are obtained. The fibers are washed at 65-75℃ for 30-45 minutes to form continuous fibers. (ii) Cut the continuous fiber into short fibers of 50-60cm, and curl, wrap and shrink the single short fiber to form a spherical structure to obtain an elastic fiber ball.
[0008] As a further optimization of the present invention, the radius of the fiber ball is 1.5-2.5cm.
[0009] As a further optimization of the present invention, the preparation process of the water-repellent microparticles is as follows: (a) Add hexadecyltrimethoxysilane, potassium carbonate, paraffin, nano silica and zinc borate into a mixer and stir at 65 r / min for 30-45 min to obtain a preform. (ii) Add the pre-made material into the internal mixer, heat it to 145-155℃, shear at 15-35 rpm for 8 min, shear at 25-45 rpm for 13 min, and shear at 15-35 rpm for 21 min to obtain the composite material; (iii) The obtained composite material is cooled and solidified, ground using an air jet mill, and passed through an 800-mesh sieve to obtain water-repellent microparticles.
[0010] As a further optimization of the present invention, the specific manufacturing process of the inner layer material and the outer layer material is as follows: Preparation of the inner layer: (a) Mix ethylene-ethyl acrylate with zinc stearate, antioxidant 1076 and light stabilizer HALS-622, stir at 180 rpm for 2 min, add calcium carbonate and talc, stir at 360 rpm for 3-5 min to obtain internal preform. (ii) Add the internal preform to the extrusion granulator and granulate at a temperature of 175-185℃ to obtain internal preform particles, which are then mixed with elastic fiber balls to obtain the inner layer material of the sealing strip. Preparation of outer layer material: (iii) Pulverize ethylene-ethyl acrylate for 30-60s, add water-repellent microparticles, ethylene-ethyl acrylate, carbon black, zinc oxide, stearic acid, aluminum hydroxide, antioxidant UV-531 and light stabilizer HALS-622, pulverize for 45-60s, add liquid paraffin, pulverize for 30-60s, and obtain masterbatch. (a) Cool the masterbatch to 60-80℃, and plasticize it in an environment of 90℃ for 30-40s. Add dibenzothiazole disulfide and 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at a temperature of 175-185℃ to obtain the outer layer material of the sealing strip.
[0011] As a further optimization of the present invention, when the outer layer material is coated onto the outer surface of the inner layer material by a hot pressing process, the ratio of the inner layer to the outer layer is 1:0.3-0.5.
[0012] The beneficial effects of this invention are as follows: This invention employs a hot-pressing process to coat the outer layer of an inner layer with an outer material, forming a waterproof and dustproof sealing strip. Elastic fiber balls added to the inner layer serve as a supporting framework, forming an elastic network. When the waterproof and dustproof sealing strip is compressed, these elastic fiber balls first deform and absorb energy. When the pressure is released, their inherent high resilience, provided by polyethylene and maleic anhydride-grafted polyethylene, drives them to quickly return to their original shape, thus providing strong resilience for the entire sealing strip. This advantage is particularly pronounced in winter. The outer layer, coating the outer surface of the inner material, primarily serves to provide environmental protection and improve durability, effectively preventing aging and contamination of the waterproof and dustproof sealing strip. Detailed Implementation
[0013] The present application will now be described in further detail. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.
[0014] Unless otherwise specified, all methods used in this invention are conventional methods known to those skilled in the art, and all reagents and materials used are commercially available products.
[0015] Example 1 The preparation process of the spinning solution is as follows: (a) Dry titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, and zinc stearate in an oven at 70°C for 30 min. Mix 85 parts of polyethylene granules, 6 parts of titanium dioxide, 15 parts of maleic anhydride-grafted polyethylene, 1 part of glycyrrhizic acid, 6 parts of zinc stearate, and 5 parts of inulin at 12°C and stir at 100 rpm for 10 min to obtain a premixed material. (ii) Stir the premixed material at 60 rpm for 10 min at 150℃ to obtain a uniform melt, and keep it at 150℃ to obtain a spinning solution. The preparation process of elastic fiber balls is as follows: (a) The spinning solution is fed into a melt spinning machine and extruded into a fine fiber stream through the micropores of the spinneret. After stretching and cooling, the fiber is solidified and pre-made. The fiber is washed at 70°C for 30 minutes to form a continuous fiber. (ii) Cut the continuous fiber into short fibers of 55cm, and curl, wrap and shrink the single short fiber to form a spherical structure to obtain an elastic fiber ball (the radius of the fiber ball is 1.5cm). The preparation process of water-repellent microparticles is as follows: (a) Add 45 parts of hexadecyltrimethoxysilane, 4 parts of potassium carbonate, 10 parts of paraffin, 16 parts of nano silica and 23 parts of zinc borate into a mixer and stir at 65 r / min for 35 min to obtain a preform. (ii) Add the pre-made material into the internal mixer, heat it to 150°C, shear at 25 rpm for 8 min, shear at 35 rpm for 13 min, and shear at 20 rpm for 21 min to obtain the composite material; (iii) The obtained composite material is cooled and solidified, then ground using an air jet mill and passed through an 800-mesh sieve to obtain water-repellent microparticles; The specific manufacturing processes for the inner and outer layer materials are as follows: Preparation of the inner layer: (a) Mix 85 parts of ethylene-ethyl acrylate with 3 parts of zinc stearate, 2 parts of antioxidant 1076 and 6 parts of light stabilizer HALS-622, stir at 180 rpm for 2 min, add 5 parts of calcium carbonate and 4 parts of talc, stir at 360 rpm for 4 min to obtain the internal preform. (ii) Add the internal preform to the extrusion granulator and granulate at 180°C to obtain internal preform granules, which are then mixed with 25 parts of elastic fiber balls to obtain the inner layer material of the sealing strip. Preparation of outer layer material: (iii) Pulping ethylene-ethyl acrylate for 45s, adding 35 parts of water-repellent microparticles, 85 parts of ethylene-ethyl acrylate, 12 parts of carbon black, 2 parts of zinc oxide, 2 parts of stearic acid, 8 parts of aluminum hydroxide, 3 parts of antioxidant UV-531 and 0.8 parts of light stabilizer HALS-622, pulverizing for 50s, adding 12 parts of liquid paraffin, pulverizing for 30s, to obtain masterbatch; (iv) Cool the masterbatch to 70°C, and plasticize it in an environment of 90°C for 35 seconds. Add 1.5 parts of dibenzothiazole disulfide and 7 parts of 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at 180°C to obtain the outer layer material of the sealing strip. The outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process to form a waterproof and dustproof sealing strip material. When the outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process, the ratio of the inner layer to the outer layer is 1:0.5.
[0016] Example 2 The preparation process of the spinning solution is as follows: (a) Dry titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, and zinc stearate in an oven at 70°C for 30 min. Mix 65 parts polyethylene granules, 3 parts titanium dioxide, 5 parts maleic anhydride-grafted polyethylene, 0.5 parts glycyrrhizic acid, 3 parts zinc stearate, and 3 parts inulin at 12°C and stir at 100 rpm for 10 min to obtain a premixed material. (ii) Stir the premixed material at 60 rpm for 10 min at 150℃ to obtain a uniform melt, and keep it at 150℃ to obtain a spinning solution. The preparation process of elastic fiber balls is as follows: (a) The spinning solution is fed into a melt spinning machine and extruded into a fine fiber stream through the micropores of the spinneret. After stretching and cooling, the fiber is solidified and pre-made. The fiber is washed at 70°C for 30 minutes to form a continuous fiber. (ii) Cut the continuous fiber into short fibers of 55cm, and curl, wrap and shrink the single short fiber to form a spherical structure to obtain an elastic fiber ball (the radius of the fiber ball is 2.5cm). The preparation process of water-repellent microparticles is as follows: (a) Add 30 parts of hexadecyltrimethoxysilane, 2 parts of potassium carbonate, 5 parts of paraffin, 8 parts of nano silica and 15 parts of zinc borate into a mixer and stir at 65 r / min for 35 min to obtain a preform. (ii) Add the pre-made material into the internal mixer, heat it to 150°C, shear at 25 rpm for 8 min, shear at 35 rpm for 13 min, and shear at 20 rpm for 21 min to obtain the composite material; (iii) The obtained composite material is cooled and solidified, then ground using an air jet mill and passed through an 800-mesh sieve to obtain water-repellent microparticles; The specific manufacturing processes for the inner and outer layer materials are as follows: Preparation of the inner layer: (a) Mix 80 parts of ethylene-ethyl acrylate with 1 part of zinc stearate, 1 part of antioxidant 1076 and 2 parts of light stabilizer HALS-622, stir at 180 rpm for 2 min, add 3 parts of calcium carbonate and 2 parts of talc, stir at 360 rpm for 4 min to obtain the internal preform. (ii) Add the internal preform to the extrusion granulator and granulate at 180°C to obtain internal preform granules, which are then mixed with 20 parts of elastic fiber balls to obtain the inner layer material of the sealing strip. Preparation of outer layer material: (iii) Pulverize ethylene-ethyl acrylate for 45s, add 15 parts water-repellent microparticles, 75 parts ethylene-ethyl acrylate, 6 parts carbon black, 1 part zinc oxide, 0.5 parts stearic acid, 4 parts aluminum hydroxide, 1 part antioxidant UV-531 and 0.2 parts light stabilizer HALS-622, pulverize for 50s, add 6 parts liquid paraffin, pulverize for 30s to obtain masterbatch; (iv) Cool the masterbatch to 70°C, and plasticize it in an environment of 90°C for 35 seconds. Add 0.5 parts of dibenzothiazole disulfide and 4 parts of 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at 180°C to obtain the outer layer material of the sealing strip. The outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process to form a waterproof and dustproof sealing strip material. When the outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process, the ratio of the inner layer to the outer layer is 1:0.3.
[0017] Example 3 The preparation process of the spinning solution is as follows: (a) Dry titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, and zinc stearate in an oven at 70°C for 30 min. Mix 70 parts polyethylene granules, 4 parts titanium dioxide, 10 parts maleic anhydride-grafted polyethylene, 0.8 parts glycyrrhizic acid, 5 parts zinc stearate, and 4 parts inulin at 12°C and stir at 100 rpm for 10 min to obtain a premixed material. (ii) Stir the premixed material at 60 rpm for 10 min at 150℃ to obtain a uniform melt, and keep it at 150℃ to obtain a spinning solution. The preparation process of elastic fiber balls is as follows: (a) The spinning solution is fed into a melt spinning machine and extruded into a fine fiber stream through the micropores of the spinneret. After stretching and cooling, the fiber is solidified and pre-made. The fiber is washed at 70°C for 30 minutes to form a continuous fiber. (ii) Cut the continuous fiber into short fibers of 55cm, and curl, wrap and shrink the single short fiber to form a spherical structure to obtain an elastic fiber ball (the radius of the fiber ball is 2cm). The preparation process of water-repellent microparticles is as follows: (a) Add 35 parts of hexadecyltrimethoxysilane, 3 parts of potassium carbonate, 8 parts of paraffin, 12 parts of nano silica and 19 parts of zinc borate into a mixer and stir at 65 r / min for 35 min to obtain a preform. (ii) Add the pre-made material into the internal mixer, heat it to 150°C, shear at 25 rpm for 8 min, shear at 35 rpm for 13 min, and shear at 20 rpm for 21 min to obtain the composite material; (iii) The obtained composite material is cooled and solidified, then ground using an air jet mill and passed through an 800-mesh sieve to obtain water-repellent microparticles; The specific manufacturing processes for the inner and outer layer materials are as follows: Preparation of the inner layer: (a) Mix 82 parts of ethylene-ethyl acrylate with 2 parts of zinc stearate, 1 part of antioxidant 1076 and 4 parts of light stabilizer HALS-622, stir at 180 rpm for 2 min, add 4 parts of calcium carbonate and 3 parts of talc, stir at 360 rpm for 4 min to obtain the internal preform. (ii) Add the internal preform to the extrusion granulator and granulate at 180°C to obtain internal preform granules, which are then mixed with 25 parts of elastic fiber balls to obtain the inner layer material of the sealing strip. Preparation of outer layer material: (III) Pulverize ethylene-ethyl acrylate for 45s, add 25 parts water-repellent microparticles, 80 parts ethylene-ethyl acrylate, 8 parts carbon black, 2 parts zinc oxide, 1 part stearic acid, 6 parts aluminum hydroxide, 2 parts antioxidant UV-531 and 0.6 parts light stabilizer HALS-622, pulverize for 50s, add 9 parts liquid paraffin, pulverize for 30s to obtain masterbatch; (iv) Cool the masterbatch to 70°C, and plasticize it in an environment of 90°C for 35 seconds. Add 1 part of dibenzothiazole disulfide and 5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at 180°C to obtain the outer layer material of the sealing strip. The outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process to form a waterproof and dustproof sealing strip material. When the outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process, the ratio of the inner layer to the outer layer is 1:0.4.
[0018] Comparative Example 1 The preparation process of the spinning solution is as follows: (a) Dry titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, and zinc stearate in an oven at 70°C for 30 min. Mix 70 parts polyethylene granules, 4 parts titanium dioxide, 10 parts maleic anhydride-grafted polyethylene, 0.8 parts glycyrrhizic acid, 5 parts zinc stearate, and 4 parts inulin at 12°C and stir at 100 rpm for 10 min to obtain a premixed material. (ii) Stir the premixed material at 60 rpm for 10 min at 150℃ to obtain a uniform melt, and keep it at 150℃ to obtain a spinning solution. The preparation process of elastic fiber balls is as follows: (a) The spinning solution is fed into a melt spinning machine and extruded into a fine fiber stream through the micropores of the spinneret. After stretching and cooling, the fiber is solidified and pre-made. The fiber is washed at 70°C for 30 minutes to form a continuous fiber. (ii) Cut the continuous fiber into short fibers of 55cm, and curl, wrap and shrink the single short fiber to form a spherical structure to obtain an elastic fiber ball (the radius of the fiber ball is 2cm). The specific manufacturing processes for the inner and outer layer materials are as follows: Preparation of the inner layer: (a) Mix 82 parts of ethylene-ethyl acrylate with 2 parts of zinc stearate, 1 part of antioxidant 1076 and 4 parts of light stabilizer HALS-622, stir at 180 rpm for 2 min, add 4 parts of calcium carbonate and 3 parts of talc, stir at 360 rpm for 4 min to obtain the internal preform. (ii) Add the internal preform to the extrusion granulator and granulate at 180°C to obtain internal preform granules, which are then mixed with 25 parts of elastic fiber balls to obtain the inner layer material of the sealing strip. Preparation of outer layer material: (iii) Pulverize ethylene-ethyl acrylate for 45s, add 80 parts of ethylene-ethyl acrylate, 8 parts of carbon black, 2 parts of zinc oxide, 1 part of stearic acid, 6 parts of aluminum hydroxide, 2 parts of antioxidant UV-531 and 0.6 parts of light stabilizer HALS-622, pulverize for 50s, add 9 parts of liquid paraffin, pulverize for 30s to obtain masterbatch; (iv) Cool the masterbatch to 70°C, and plasticize it in an environment of 90°C for 35 seconds. Add 1 part of dibenzothiazole disulfide and 5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at 180°C to obtain the outer layer material of the sealing strip. The outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process to form a waterproof and dustproof sealing strip material. When the outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process, the ratio of the inner layer to the outer layer is 1:0.4.
[0019] Comparative Example 2 The preparation process of water-repellent microparticles is as follows: (a) Add 35 parts of hexadecyltrimethoxysilane, 3 parts of potassium carbonate, 8 parts of paraffin, 12 parts of nano silica and 19 parts of zinc borate into a mixer and stir at 65 r / min for 35 min to obtain a preform. (ii) Add the pre-made material into the internal mixer, heat it to 150°C, shear at 25 rpm for 8 min, shear at 35 rpm for 13 min, and shear at 20 rpm for 21 min to obtain the composite material; (iii) The obtained composite material is cooled and solidified, then ground using an air jet mill and passed through an 800-mesh sieve to obtain water-repellent microparticles; The specific manufacturing processes for the inner and outer layer materials are as follows: Preparation of the inner layer: (a) Mix 82 parts of ethylene-ethyl acrylate with 2 parts of zinc stearate, 1 part of antioxidant 1076 and 4 parts of light stabilizer HALS-622, stir at 180 rpm for 2 min, add 4 parts of calcium carbonate and 3 parts of talc, stir at 360 rpm for 4 min to obtain the internal preform. (ii) The internal pre-formed material is added to an extrusion granulator and granulated at 180°C to obtain the inner layer material of the sealing strip; Preparation of outer layer material: (III) Pulverize ethylene-ethyl acrylate for 45s, add 25 parts water-repellent microparticles, 80 parts ethylene-ethyl acrylate, 8 parts carbon black, 2 parts zinc oxide, 1 part stearic acid, 6 parts aluminum hydroxide, 2 parts antioxidant UV-531 and 0.6 parts light stabilizer HALS-622, pulverize for 50s, add 9 parts liquid paraffin, pulverize for 30s to obtain masterbatch; (iv) Cool the masterbatch to 70°C, and plasticize it in an environment of 90°C for 35 seconds. Add 1 part of dibenzothiazole disulfide and 5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at 180°C to obtain the outer layer material of the sealing strip. The outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process to form a waterproof and dustproof sealing strip material. When the outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process, the ratio of the inner layer to the outer layer is 1:0.4.
[0020] Comparative Example 3 The preparation process of the spinning solution is as follows: (a) Dry titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, and zinc stearate in an oven at 70°C for 30 min. Mix 70 parts polyethylene granules, 4 parts titanium dioxide, 10 parts maleic anhydride-grafted polyethylene, 0.8 parts glycyrrhizic acid, 5 parts zinc stearate, and 4 parts inulin at 12°C and stir at 100 rpm for 10 min to obtain a premixed material. (ii) Stir the premixed material at 60 rpm for 10 min at 150℃ to obtain a uniform melt, and keep it at 150℃ to obtain a spinning solution. The preparation process of elastic fiber balls is as follows: (a) The spinning solution is fed into a melt spinning machine and extruded into a fine fiber stream through the micropores of the spinneret. After stretching and cooling, the fiber is solidified and pre-made. The fiber is washed at 70°C for 30 minutes to form a continuous fiber. (ii) Cut the continuous fiber into short fibers of 55cm, and curl, wrap and shrink the single short fiber to form a spherical structure to obtain an elastic fiber ball (the radius of the fiber ball is 2cm). The preparation process of water-repellent microparticles is as follows: (a) Add 35 parts of hexadecyltrimethoxysilane, 3 parts of potassium carbonate, 8 parts of paraffin, 12 parts of nano silica and 19 parts of zinc borate into a mixer and stir at 65 r / min for 35 min to obtain a preform. (ii) Add the pre-made material into the internal mixer, heat it to 150°C, shear at 25 rpm for 8 min, shear at 35 rpm for 13 min, and shear at 20 rpm for 21 min to obtain the composite material; (iii) The obtained composite material is cooled and solidified, then ground using an air jet mill and passed through an 800-mesh sieve to obtain water-repellent microparticles; The specific manufacturing processes for the inner and outer layer materials are as follows: Preparation of the inner layer: (a) Mix 82 parts of ethylene-ethyl acrylate with 2 parts of zinc stearate, 1 part of antioxidant 1076 and 4 parts of light stabilizer HALS-622, stir at 180 rpm for 2 min, add 4 parts of calcium carbonate and 3 parts of talc, stir at 360 rpm for 4 min to obtain the internal preform. (ii) Add the internal preform to the extrusion granulator and granulate at 180°C to obtain internal preform granules, which are then mixed with 25 parts of elastic fiber balls to obtain the inner layer material of the sealing strip. Preparation of outer layer material: (III) Pulverize ethylene-ethyl acrylate for 45s, add 25 parts water-repellent microparticles, 80 parts ethylene-ethyl acrylate, 8 parts carbon black, 2 parts zinc oxide, 1 part stearic acid, 6 parts aluminum hydroxide, 2 parts antioxidant UV-531 and 0.6 parts light stabilizer HALS-622, pulverize for 50s, add 9 parts liquid paraffin, pulverize for 30s to obtain masterbatch; (iv) Cool the masterbatch to 70°C, and plasticize it in an environment of 90°C for 35 seconds. Add 1 part of dibenzothiazole disulfide and 5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at 180°C to obtain the outer layer material of the sealing strip. The outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process to form a waterproof and dustproof sealing strip material. When the outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process, the ratio of the inner layer to the outer layer is 1:0.2.
[0021] Comparative Example 4 The preparation process of the spinning solution is as follows: (a) Dry titanium dioxide, maleic anhydride-grafted polyethylene, glycyrrhizic acid, and zinc stearate in an oven at 70°C for 30 min. Mix 70 parts polyethylene granules, 4 parts titanium dioxide, 10 parts maleic anhydride-grafted polyethylene, 0.8 parts glycyrrhizic acid, 5 parts zinc stearate, and 4 parts inulin at 12°C and stir at 100 rpm for 10 min to obtain a premixed material. (ii) Stir the premixed material at 60 rpm for 10 min at 150℃ to obtain a uniform melt, and keep it at 150℃ to obtain a spinning solution. The preparation process of elastic fiber balls is as follows: (a) The spinning solution is fed into a melt spinning machine and extruded into a fine fiber stream through the micropores of the spinneret. After stretching and cooling, the fiber is solidified and pre-made. The fiber is washed at 70°C for 30 minutes to form a continuous fiber. (ii) Cut the continuous fiber into short fibers of 55cm, and curl, wrap and shrink the single short fiber to form a spherical structure to obtain an elastic fiber ball (the radius of the fiber ball is 2cm). The preparation process of water-repellent microparticles is as follows: (a) Add 35 parts of hexadecyltrimethoxysilane, 3 parts of potassium carbonate, 8 parts of paraffin, 12 parts of nano silica and 19 parts of zinc borate into a mixer and stir at 65 r / min for 35 min to obtain a preform. (ii) Add the pre-made material into the internal mixer, heat it to 150°C, shear at 25 rpm for 8 min, shear at 35 rpm for 13 min, and shear at 20 rpm for 21 min to obtain the composite material; (iii) The obtained composite material is cooled and solidified, then ground using an air jet mill and passed through an 800-mesh sieve to obtain water-repellent microparticles; The specific manufacturing processes for the inner and outer layer materials are as follows: Preparation of the inner layer: (a) Mix 82 parts of ethylene-ethyl acrylate with 2 parts of zinc stearate, 1 part of antioxidant 1076 and 4 parts of light stabilizer HALS-622, stir at 180 rpm for 2 min, add 4 parts of calcium carbonate and 3 parts of talc, stir at 360 rpm for 4 min to obtain the internal preform. (ii) Add the internal preform to the extrusion granulator and granulate at 180°C to obtain internal preform granules, which are then mixed with 25 parts of elastic fiber balls to obtain the inner layer material of the sealing strip. Preparation of outer layer material: (III) Pulverize ethylene-ethyl acrylate for 45s, add 25 parts water-repellent microparticles, 80 parts ethylene-ethyl acrylate, 8 parts carbon black, 2 parts zinc oxide, 1 part stearic acid, 6 parts aluminum hydroxide, 2 parts antioxidant UV-531 and 0.6 parts light stabilizer HALS-622, pulverize for 50s, add 9 parts liquid paraffin, pulverize for 30s to obtain masterbatch; (iv) Cool the masterbatch to 70°C, and plasticize it in an environment of 90°C for 35 seconds. Add 1 part of dibenzothiazole disulfide and 5 parts of 2,5-dimethyl-2,5-di(tert-butylperoxide)hexane. After homogenization, the outer layer preform is obtained. The outer layer preform is added to an extrusion granulator and granulated at 180°C to obtain the outer layer material of the sealing strip. The outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process to form a waterproof and dustproof sealing strip material. When the outer layer material is coated onto the outer surface of the inner layer material through a hot-pressing process, the ratio of the inner layer to the outer layer is 1:0.6.
[0022] Performance testing (i) The performance of the waterproof and dustproof sealing strips prepared in Examples 1-3 and Comparative Examples 1-4 was tested according to the test method in QC / T 716-2021 "Test Method for Compression Permanent Deformation of Automotive Sealing Strips". The test results are shown in Table 1.
[0023] Table 1
[0024] As can be seen from the test results in Table 1, the waterproof and dustproof sealing strip materials prepared in Examples 1-3 have a low deformation rate after long-term compression.
[0025] (ii) The performance of the waterproof and dustproof sealing strip materials prepared in Examples 1-3 and Comparative Examples 1-4 was tested according to the test methods in QC / T 711-2021 "Test Method for Compression Load of Automotive Sealing Strips". The test results are shown in Table 2.
[0026] Table 2
[0027] As can be seen from Table 2, the waterproof and dustproof sealing strip materials prepared by the methods in Examples 1-3 have a high compression load. When used in automobile manufacturing as door or window seals, they can seal tightly when the vehicle is traveling at high speed. The high compression load means that the sealing strip has a very large clamping force on the vehicle body, which can form a very tight sealing interface. This is very beneficial for isolating wind noise, dust and rainwater.
[0028] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.
Claims
1. An environmentally friendly anti-fogging, waterproof and dustproof sealing rubber strip material for vehicle lamps, characterized in that, The waterproof and dustproof sealing strip material comprises an inner layer material and an outer layer material, and the outer layer material is coated on the outer surface of the inner layer material by a hot pressing process to form the waterproof and dustproof sealing strip material; The inner layer material is composed of 20-30 parts of elastic fiber balls, 80-85 parts of ethylene-ethyl acrylate, 3-5 parts of calcium carbonate, 2-4 parts of talcum powder, 1-3 parts of zinc stearate, 1-2 parts of antioxidant 1076 and 2-6 parts of light stabilizer HALS-622 by weight; The outer layer material comprises 15-35 parts of water-repellent particles, 75-85 parts of ethylene-ethyl acrylate, 6-12 parts of carbon black, 1-2 parts of zinc oxide, 0.5-2 parts of stearic acid, 6-12 parts of liquid paraffin, 4-8 parts of aluminum hydroxide, 0.5-1.5 parts of diphenyl disulfide, 4-7 parts of 2,5-dimethyl-2,5-di(tert-butyl peroxide) hexane, 1-3 parts of antioxidant UV-531 and 0.2-0.8 parts of light stabilizer HALS-622 by weight; The elastic fiber balls are obtained by melt spinning of a spinning solution into continuous fibers, and then cutting and fiber ballizing the continuous fibers; The preparation raw materials of the spinning solution comprise 65-85 parts of polyethylene particles, 3-6 parts of titanium dioxide, 5-15 parts of maleic anhydride grafted polyethylene, 0.5-1 part of glycyrrhizic acid, 3-6 parts of zinc stearate and 3-5 parts of inulin by weight; The preparation raw materials of the water-repellent particles comprise 30-45 parts of hexadecyl trimethoxysilane, 2-4 parts of potassium carbonate, 5-10 parts of paraffin wax, 8-16 parts of nano silicon dioxide and 15-23 parts of zinc borate by weight.
2. The environment-friendly waterproof and dustproof sealing adhesive tape material for anti-fog vehicle lamp according to claim 1, characterized in that, The preparation process of the spinning solution is as follows: (1) Dry titanium dioxide, maleic anhydride grafted polyethylene, glycyrrhizic acid and zinc stearate in an oven at 60-80℃ for 30min, mix polyethylene particles, titanium dioxide, maleic anhydride grafted polyethylene, glycyrrhizic acid, zinc stearate and inulin at 10-15℃, and stir at 100rpm for 10min to obtain a premix; (2) Stir the premix at 140-160℃ and 60rpm for 10min to obtain a uniform melt, and store the melt at 150℃ to obtain the spinning solution.
3. The environmentally friendly anti-fogging, waterproof and dust-proof sealing adhesive tape material for vehicle lamps according to claim 2, characterized in that, The preparation process of the elastic fiber balls is as follows: (1) Feed the spinning solution into a melt spinning machine, extrude the solution into a fiber stream through the micropores of a spinneret, stretch, cool and solidify the fiber stream to obtain a preformed fiber, and cut the continuous fiber into short fibers of 50-60cm in length; (2) Roll, wind and shrink the single short fiber to form a spherical structure to obtain the elastic fiber balls.
4. The environmentally friendly anti-fogging, waterproof and dust-proof sealing adhesive tape material for vehicle lamps according to claim 3, characterized in that, The radius of the fiber balls is 1.5-2.5cm.
5. The environment-friendly waterproof and dustproof sealing adhesive tape material for anti-fog vehicle lamp according to claim 1, characterized in that, The preparation process of the water-repellent particles is as follows: (1) Put hexadecyl trimethoxysilane, potassium carbonate, paraffin wax, nano silicon dioxide and zinc borate into a stirrer, and stir at 65r / min for 30-45min to obtain a preformed material; (II) The pre-made material is added into the internal mixer, and the temperature is raised to 145-155℃, 15-35rpm shearing for 8min, 25-45rpm shearing for 13min, and 15-35rpm shearing for 21min to obtain the composite material; (III) The obtained composite material is cooled and solidified, and is ground by an airflow grinder, and is sieved through an 800-mesh screen to obtain water-repellent particles.
6. The environmentally friendly anti-fogging, waterproof and dust-proof sealing adhesive tape material for vehicle lamps according to claim 5, characterized in that, The specific preparation process of the inner layer material and the outer layer material is as follows: Preparation of the inner layer: (I) Ethylene-ethyl acrylate, zinc stearate, antioxidant 1076, and light stabilizer HALS-622 are mixed, 180rpm stirring for 2min, calcium carbonate and talc are added, and 360rpm stirring is performed for 3-5min to obtain internal pre-made material; (II) The internal pre-made material is added into an extrusion granulator, and is granulated at a temperature of 175-185℃ to obtain internal pre-made material particles, which are mixed with elastic fiber balls to obtain the inner layer material of the sealing strip; Preparation of the outer layer material: (I) Ethylene-ethyl acrylate is plasticized for 30-60s, water-repellent particles, ethylene-ethyl acrylate, carbon black, zinc oxide, stearic acid, aluminum hydroxide, antioxidant UV-531, and light stabilizer HALS-622 are added, plasticized for 45-60s, liquid paraffin is added, and plasticized for 30-60s to obtain a masterbatch; (II) The masterbatch is cooled to 60-80℃, plasticized for 30-40s in an environment at 90℃, diphenyl disulfide and 2,5-dimethyl-2,5-di(tert-butyl peroxide) hexane are added, and the mixture is uniformly mixed to obtain outer layer pre-made material; (III) The outer layer pre-made material is added into an extrusion granulator, and is granulated at a temperature of 175-185℃ to obtain the outer layer material of the sealing strip.
7. The environmentally friendly anti-fogging, waterproof and dust-proof sealing adhesive tape material for vehicle lamps according to claim 6, characterized in that, When the outer layer material is coated on the outer surface of the inner layer material by the hot pressing process, the ratio of the inner layer to the outer layer is 1:0.3-0.5.