Automobile high-durability front bumper seal

Abstract

The utility model provides a kind of high durable front fender sealing strip of car, the high durable front fender sealing strip of car includes sealing strip body, the sealing strip body includes a structure main body layer of I-shaped structure, the front side of the structure main body layer is provided with a layer of sun protection heat insulation layer, buffer layer is arranged between the sun protection heat insulation layer with the structure main body layer, longitudinal compression resistance layer is provided on the back side of the structure main body layer, the longitudinal compression resistance layer is adhered with structure main body layer by ethylene ester copolymer hot melt glue, the buffer layer is connected with structure main body layer by co-extrusion forming, the buffer layer is adhered with sun protection heat insulation layer by acrylate pressure-sensitive adhesive. The high durable front fender sealing strip of car provided by the utility model improves the sun protection compression resistance function of front fender sealing strip.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, specifically relating to a highly durable windshield sealing strip for automobiles. Background Technology

[0002] The windshield sealing strip is a functional sealing strip installed around the perimeter of the glass. Its core functions are to seal against water and moisture, provide sound insulation and vibration damping, prevent dust and dirt accumulation, and secure the windshield to the vehicle body. Most existing sealing strips are made of a single type of rubber, which is prone to aging and cracking when exposed to ultraviolet radiation and high temperatures for extended periods, leading to a decline in sealing performance. Utility Model Content

[0003] The main purpose of this utility model is to provide a highly durable windshield sealing strip for automobiles, which improves the sun protection and pressure resistance of the windshield sealing strip.

[0004] To achieve the above objectives, this utility model provides a high-durability windshield sealing strip for automobiles. The high-durability windshield sealing strip includes a sealing strip body, which comprises an I-shaped structural main layer made of EPDM rubber. A sun-protective and heat-insulating layer is provided on the front side of the structural main layer. This sun-protective and heat-insulating layer is made of EPDM modified rubber with added benzotriazole sunscreen and nano-titanium dioxide, or polyvinyl chloride composite ceramic particle material. A buffer layer is provided between the sun-protective and heat-insulating layer and the structural main layer. This buffer layer is made of polyurethane foam or closed-cell sponge rubber. A longitudinal pressure-resistant layer is provided on the rear side of the structural main layer. The longitudinal pressure-resistant layer is bonded to the structural main layer with ethylene ester copolymer hot melt adhesive. The buffer layer is connected to the structural main layer through co-extrusion molding. The buffer layer and the sun-protective and heat-insulating layer are bonded with acrylic pressure-sensitive adhesive.

[0005] This utility model provides a highly durable automotive windshield sealing strip. The main layer of the I-shaped structure is made of ethylene propylene diene monomer (EPDM) rubber, which utilizes its aging resistance and good elasticity to provide stable structural support and basic sealing ability for the sealing strip. The sun protection and heat insulation layer adds benzotriazole sunscreen and nano titanium dioxide, which can effectively absorb ultraviolet rays, reflect heat, delay rubber aging, and improve the durability of the sealing strip in high temperature and strong sunlight environments. The buffer layer is made of polyurethane foam or closed-cell sponge rubber, which can absorb vibration and impact, reduce hard friction between the glass and the car body, and reduce noise. The longitudinal pressure-resistant layer enhances the sealing strip's resistance to deformation under longitudinal force, preventing the sealing gap from increasing after long-term use. The layers are connected by co-extrusion molding, hot melt adhesive, or pressure-sensitive adhesive to ensure a firm bond between the layers, prevent delamination, and improve the overall structural stability.

[0006] In one possible implementation, adhesive strips are provided at the upper and lower ends of the rear side of the main structural layer. These adhesive strips are acrylic pressure-sensitive adhesive strips or hot-melt adhesive strips with a thickness of 0.4-0.6 mm. Providing acrylic pressure-sensitive adhesive strips or hot-melt adhesive strips of a specific thickness at the upper and lower ends of the rear side of the main structural layer enhances the adhesion strength between the sealing strip and the vehicle frame and windshield, ensuring that it is not easily loosened or shifted after installation. Furthermore, the reasonable thickness design ensures adhesion while avoiding deformation during installation due to excessively thick adhesive layers, or adhesion failure due to excessively thin layers, further improving the reliability of the seal.

[0007] In one possible implementation, the longitudinal pressure-resistant layer includes several pressure-resistant buffer layers and several pressure-resistant base layers. The hardness of the pressure-resistant buffer layers is lower than that of the pressure-resistant base layers, and the pressure-resistant buffer layers and the pressure-resistant base layers are alternately arranged. The longitudinal pressure-resistant layer uses pressure-resistant buffer layers and pressure-resistant base layers of different hardnesses alternately arranged to form an alternating structure: the low-hardness pressure-resistant buffer layers can absorb instantaneous impact forces, while the high-hardness pressure-resistant base layers provide continuous structural support. The synergistic effect of the two ensures both overall pressure resistance and a certain degree of elastic buffering capacity, effectively resisting deformation caused by vehicle vibration and external pressure, and extending the service life of the sealing strip.

[0008] In one possible implementation, the compressive buffer layer is disposed above the compressive base layer, and the number of layers in the compressive buffer layer and the compressive base layer is the same. By limiting the compressive buffer layer to be located above the compressive base layer and having the same number of layers in both, the structural distribution of the longitudinal compressive layers is optimized: the upper buffer layer preferentially absorbs external impacts, the lower base layer provides stable support, and the design with the same number of layers ensures more uniform force transmission, avoiding localized stress concentration due to uneven interlayer distribution, and further improving the stability and consistency of longitudinal compressive performance.

[0009] In one possible implementation, a marking is provided on the upper surface of the sealing strip body. This marking visually indicates the installation direction, position, or specifications, allowing installers to quickly identify the correct installation posture and avoid problems such as uneven sealing gaps and performance degradation caused by incorrect installation. This improves installation efficiency and accuracy, and also serves as brand identification or quality traceability, enhancing the product's usability. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a high-durability windshield sealing strip for automobiles provided by this utility model. Detailed Implementation

[0011] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0012] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0013] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0014] See attached diagram. Figure 1 , Figure 1 This is a schematic diagram of a high-durability windshield sealing strip structure for automobiles provided by this utility model, as shown below. Figure 1 As shown, the present invention provides a high-durability automotive windshield sealing strip, comprising a sealing strip body, wherein the sealing strip body includes an I-shaped structural main layer 1, the structural main layer 1 being made of EPDM rubber, a sun-protective and heat-insulating layer 2 being provided on the front side of the structural main layer 1, the sun-protective and heat-insulating layer 2 being made of EPDM modified rubber or polyvinyl chloride composite ceramic particle material with added benzotriazole sunscreen and nano titanium dioxide, a buffer layer 3 being provided between the sun-protective and heat-insulating layer 2 and the structural main layer 1, the buffer layer 3 being made of polyurethane foam or closed-cell sponge rubber, a longitudinal pressure-resistant layer 4 being provided on the rear side of the structural main layer 1, the longitudinal pressure-resistant layer 4 being bonded to the structural main layer 1 by ethylene ester copolymer hot melt adhesive, the buffer layer 3 being connected to the structural main layer 1 by co-extrusion molding, and the buffer layer 3 being bonded to the sun-protective and heat-insulating layer 2 by acrylic pressure-sensitive adhesive.

[0015] The high-durability windshield sealing strip provided by this utility model has an I-shaped main layer 1 made of ethylene propylene diene monomer (EPDM) rubber. Utilizing its aging resistance and good elasticity, it provides stable structural support and basic sealing capability for the sealing strip. The sun-protective and heat-insulating layer 2 contains benzotriazole sunscreen and nano-titanium dioxide, which can effectively absorb ultraviolet rays, reflect heat, delay rubber aging, and improve the durability of the sealing strip under high temperature and strong sunlight. The buffer layer 3 is made of polyurethane foam or closed-cell sponge rubber, which can absorb vibration and impact, reduce hard friction between the glass and the car body, and reduce noise. The longitudinal pressure-resistant layer 4 enhances the sealing strip's resistance to deformation under longitudinal force, preventing the sealing gap from increasing after long-term use. The layers are connected by co-extrusion molding, hot melt adhesive, or pressure-sensitive adhesive to ensure a strong interlayer bond, prevent delamination, and improve overall structural stability.

[0016] In one possible implementation, adhesive strips 5 are provided at the upper and lower ends of the rear side of the main structural layer 1. The adhesive strips 5 are acrylic pressure-sensitive adhesive strips or hot melt adhesive strips with a thickness of 0.4-0.6 mm. Providing acrylic pressure-sensitive adhesive strips or hot melt adhesive strips of a specific thickness at the upper and lower ends of the rear side of the main structural layer 1 enhances the adhesion strength between the sealing strip and the vehicle frame and windshield, ensuring that it is not easily loosened or displaced after installation. Furthermore, the reasonable thickness design ensures the bonding effect while avoiding deformation due to excessive thickness during installation or bonding failure due to insufficient thickness, further improving the reliability of the seal.

[0017] In one possible implementation, the longitudinal pressure-resistant layer 4 includes several pressure-resistant buffer layers 41 and several pressure-resistant base layers 42. The hardness of the pressure-resistant buffer layers 41 is less than that of the pressure-resistant base layers 42, and the pressure-resistant buffer layers 41 and the pressure-resistant base layers 42 are staggered. The longitudinal pressure-resistant layer 4 uses pressure-resistant buffer layers 41 and pressure-resistant base layers 42 with different hardnesses, forming an alternating structure: the low-hardness pressure-resistant buffer layers 41 can absorb instantaneous impact force, while the high-hardness pressure-resistant base layers 42 provide continuous structural support. The synergistic effect of the two ensures both overall pressure resistance and a certain degree of elastic buffering capacity, effectively resisting deformation caused by vehicle vibration and external pressure, and extending the service life of the sealing strip.

[0018] In one possible implementation, the compression buffer layer 41 is disposed above the compression base layer 42, and the number of layers of the compression buffer layer 41 and the compression base layer 42 is the same. By limiting the compression buffer layer 41 to be located above the compression base layer 42 and ensuring that both have the same number of layers, the structural distribution of the longitudinal compression layers 4 is optimized: the upper buffer layer 3 can preferentially absorb external impacts, the lower base layer provides stable support, and the design with the same number of layers ensures more uniform force transmission, avoiding localized stress concentration due to uneven interlayer distribution, and further improving the stability and consistency of longitudinal compression resistance.

[0019] In one possible implementation, a marking is provided on the upper surface of the sealing strip body. This marking visually indicates the installation direction, position, or specifications, allowing installers to quickly identify the correct installation posture and avoid problems such as uneven sealing gaps and performance degradation caused by incorrect installation. This improves installation efficiency and accuracy, and also serves as brand identification or quality traceability, enhancing the product's usability.

[0020] It is worth mentioning that those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A highly durable automotive windshield sealing strip, characterized in that, The device includes a sealing strip body, which comprises an I-shaped structural main layer made of EPDM rubber. A sun-protective and heat-insulating layer is provided on the front side of the structural main layer. This layer is made of EPDM modified rubber with added benzotriazole sunscreen and nano-titanium dioxide, or polyvinyl chloride composite ceramic particles. A buffer layer is provided between the sun-protective and heat-insulating layer and the structural main layer. This buffer layer is made of polyurethane foam or closed-cell sponge rubber. A longitudinal pressure-resistant layer is provided on the rear side of the structural main layer. The longitudinal pressure-resistant layer is bonded to the structural main layer with ethylene ester copolymer hot melt adhesive. The buffer layer is connected to the structural main layer through co-extrusion molding. The buffer layer is bonded to the sun-protective and heat-insulating layer with acrylic pressure-sensitive adhesive.

2. The high-durability automotive windshield sealing strip according to claim 1, characterized in that, Adhesive strips are provided on the upper and lower ends of the rear side of the main structural layer. The adhesive strips are acrylic pressure-sensitive adhesive strips or hot melt adhesive strips with a thickness of 0.4-0.6 mm.

3. The high-durability automotive windshield sealing strip according to claim 2, characterized in that, The longitudinal compression-resistant layer includes several compression-resistant buffer layers and several compression-resistant base layers. The hardness of the compression-resistant buffer layers is less than that of the compression-resistant base layers, and the compression-resistant buffer layers and the compression-resistant base layers are arranged alternately.

4. The high-durability automotive windshield sealing strip according to claim 3, characterized in that, The compression-resistant buffer layer is disposed above the compression-resistant base layer, and the number of compression-resistant buffer layers is the same as that of the compression-resistant base layer.

5. The high-durability automotive windshield sealing strip according to claim 4, characterized in that, The upper surface of the sealing strip body is marked.

Images