A new type of sealing strip

Abstract

This utility model relates to the field of sealing strip technology, specifically a novel sealing strip, comprising a body and an adhesive layer. The adhesive layer is disposed at the bottom of the body. The internal material of the body includes a base layer, an anti-ultraviolet coating, and a hydrophobic coating. One side of the base layer is connected to one side of the anti-ultraviolet coating, and the other side of the anti-ultraviolet coating is connected to one side of the hydrophobic coating. The base layer is provided with reinforcing ribs, and several reinforcing ribs are evenly arranged in the base layer. The base layer is also provided with a flexible heating wire, one end of which is connected to one end of a wire, and the other end of the wire extends out of the base layer. This utility model, a novel sealing strip, solves the problem of poor performance of current equipment.

Description

Technical Field

[0001] This utility model relates to the field of sealing strip technology, specifically a novel sealing strip. Background Technology

[0002] As is well known, sealing strips are elastic sealing elements used to fill gaps between components and block external environmental factors (such as dust, moisture, and noise). They are widely used in doors and windows, automobiles, electronic equipment, and other fields. Their core function is to fill interface gaps through their own elastic deformation, achieving effects such as sealing, shock absorption, and sound insulation.

[0003] However, existing sealing strips have significant low-temperature performance defects: in low-temperature environments, the molecular chain mobility of traditional rubber materials is drastically reduced. When the temperature is below its glass transition temperature (such as EPDM rubber at around -40℃), the elastic modulus of the material can increase by more than 3 times, causing the sealing strip to harden rapidly. This hardening will reduce the sealing pressure by more than 50% and increase the leakage of interface gaps by more than 30%. If the temperature is further reduced to the embrittlement temperature (usually below -25℃), the sealing strip is very prone to cracking when subjected to mechanical stress. The tear resistance of a certain type of EPDM sealing strip at -30℃ is 62% lower than that at room temperature. More seriously, at low temperatures, the moisture between the sealing strip and the installation interface is easily frozen into ice. The 200MPa stress generated by the expansion of the ice layer will exacerbate the material cracking, forming a vicious cycle of "hardening-cracking-leakage". Actual test data shows that the average failure cycle of traditional sealing strips at -20℃ is only 1 / 3 of that at room temperature. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a novel sealing strip.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel sealing strip, comprising a body and an adhesive layer, wherein the adhesive layer is disposed at the bottom of the body, and the internal material of the body comprises a base layer, an anti-ultraviolet coating, and a hydrophobic coating, wherein one side of the base layer is connected to one side of the anti-ultraviolet coating, and the other side of the anti-ultraviolet coating is connected to one side of the hydrophobic coating, wherein the base layer is provided with reinforcing ribs, wherein there are several reinforcing ribs evenly arranged in the base layer, and the base layer is also provided with a flexible heating wire, one end of which is connected to one end of a wire, and the other end of the wire extends out of the base layer.

[0006] To facilitate the limiting of the wire, the present invention is improved by having an elastic ring fitted on the main body, wherein multiple elastic rings are provided, and the inner wall of the elastic ring tightly abuts against the outer wall of the main body.

[0007] To improve the strength of the elastic ring, this invention features an improvement where the elastic ring is made of rubber.

[0008] To improve the low-temperature resistance of the base layer, this utility model is improved by using a low-temperature resistant silicone rubber material for the base layer.

[0009] To improve the strength of the reinforcing rib, this utility model is improved by using aluminum alloy material for the reinforcing rib.

[0010] Compared with the prior art, this utility model provides a novel sealing strip with the following advantages: This novel sealing strip, in this embodiment, utilizes a synergistic design of flexible heating wire and conductor to construct an active temperature control system. When the ambient temperature is below a threshold, the flexible heating wire is connected to the power circuit via the conductor, generating heat evenly at a power density of ≤5W / m, maintaining the body temperature at 5-10℃. This effectively avoids freezing cracking or hardening caused by temperatures below -20℃. Testing has shown that this increases the sealing pressure retention rate to over 85%. The uniformly distributed aluminum alloy reinforcing ribs (6061-T6 material) within the base layer are designed with an "I"-shaped cross-section, supported by a 260MPa tensile strength structure, ensuring the base... The layer's resistance to deformation is improved by 40%, ensuring the stability of the body shape during heating. The UV-resistant coating (containing nano-TiO2) has a 95% shielding rate against UV rays in the 280-400nm wavelength band. Combined with a hydrophobic coating with a surface energy ≤20mN / m, it forms an "anti-aging-self-cleaning" composite protective layer, which can extend the outdoor service life to more than 8 years. The high-hardness rubber elastic ring (Shore hardness 75A) pre-installed before leaving the factory clamps the wires through an interference fit. After 1000 bending tests, it has been verified that the wire sway can be controlled within ±0.5mm, effectively protecting the reliability of electrical connections. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the axial structure of this utility model; Figure 3 This utility model Figure 1 A schematic diagram of the internal structure of the main body; In the diagram: 1. Body; 2. Base layer; 3. Adhesive layer; 4. UV-resistant coating; 5. Hydrophobic coating; 6. Reinforcing rib; 7. Flexible heating wire; 8. Conductor; 9. Elastic ring. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figures 1-3 A novel sealing strip includes a body 1 and an adhesive layer 3. The adhesive layer 3 is disposed at the bottom of the body 1. The internal material of the body 1 includes a base layer 2, an anti-ultraviolet coating 4, and a hydrophobic coating 5. One side of the base layer 2 is connected to one side of the anti-ultraviolet coating 4, and the other side of the anti-ultraviolet coating 4 is connected to one side of the hydrophobic coating 5. The base layer 2 is provided with reinforcing ribs 6, and several reinforcing ribs 6 are provided and evenly arranged in the base layer 2. The base layer 2 is also provided with a flexible heating wire 7, one end of which is connected to one end of a wire 8, and the other end of the wire 8 extends out of the base layer 2.

[0014] In this embodiment, special adhesive is first evenly applied to the surface of adhesive layer 3, and then adhesive layer 3 is precisely pasted to the preset installation position of the car door to complete the fixed installation of the main body 1. Subsequently, wire 8 is electrically connected to the vehicle battery (the specific connection process follows the automotive electrical system standard and will not be detailed here). The anti-ultraviolet coating 4 can effectively shield ultraviolet radiation and delay the aging of the sealing strip; the hydrophobic coating 5 can form a superhydrophobic interface on the surface to prevent rainwater from adhering and freezing. When the ambient temperature drops, the temperature sensor built into the car door will monitor the temperature change in real time. Once the temperature is detected to be lower than the set threshold (such as 0°C), the sensor will transmit the signal to the vehicle electronic control system to trigger the battery to supply power to the flexible heating wire 7. The heat generated by the heating wire is evenly conducted to the main body 1 to keep the sealing strip in a suitable working temperature range (5-10°C), avoiding hardening and cracking caused by low temperature and ensuring stable sealing performance. At the same time, the aluminum alloy reinforcing ribs 6 evenly distributed in the base layer 2 enhance the deformation resistance of the base layer through structural support, further enhancing the overall durability of the sealing strip.

[0015] In this embodiment, multiple elastic rings 9 are sleeved on the outer side of the main body 1, with their inner walls tightly fitted to the outer wall of the main body 1. The elastic rings 9 are made of highly elastic rubber and are fixed to the surface of the main body 1 by an interference fit. Before the product leaves the factory, the wires 8 can be laid along the length of the main body 1 and embedded in the gap between the elastic rings 9 and the main body 1. The radial contraction force of the elastic rings 9 can clamp the wires 8, which can not only effectively limit the axial and radial displacement of the wires 8 and avoid shaking and wear during transportation and installation, but also provide buffer support at the bending points of the wires 8 to prevent poor line contact caused by excessive bending. This design not only ensures the regularity of the arrangement of the wires 8, but also improves the overall assembly reliability of the sealing strip. When using the main body, the elastic rings need to be separated from the main body. The elastic rings can be recycled. When there are a large number, they can be sent to the manufacturer for recycling.

[0016] To enhance the structural strength and durability of the elastic ring, the elastic ring 9 in this embodiment is made of high-hardness rubber (Shore hardness 70-80A). This rubber material has been optimized with the addition of reinforcing fillers and anti-aging additives, making its tensile strength ≥15MPa and elongation at break ≥300%. While maintaining its elastic deformation capability, it can withstand radial tensile forces of more than 20N without breaking. Compared with ordinary rubber, the elastic ring 9 made of this material can not only clamp the wire more securely, but also resist the corrosion of environmental factors such as ultraviolet rays and oil stains, ensuring that the limiting effect on the wire does not diminish during long-term use.

[0017] To enhance the low-temperature adaptability of the base layer, the base layer 2 in this embodiment is made of low-temperature resistant silicone rubber. This material, through a special formulation design, lowers the glass transition temperature (Tg) to below -60℃ and can still maintain ≥80% elasticity retention in an environment of -40℃. Compared with traditional EPDM rubber, it introduces a methylphenylsiloxane structure into its molecular chain, which not only retains the excellent high and low temperature resistance of silicone rubber (operating temperature range -60℃~200℃), but also increases the tensile strength to over 10MPa and the elongation at break to 400% by adding nano-sized silica filler. The base layer 2 made of this material will not harden and crack due to low temperature under extremely cold conditions. Combined with the built-in flexible heating wire, it can form a dual antifreeze system of "material weather resistance + active heating", ensuring that the sealing strip can still maintain a sealing pressure of over 1.2MPa in an environment of -30℃, which is 50% better than the performance of traditional sealing strips.

[0018] To enhance the structural strength and overall performance of the reinforcing rib, in this embodiment, the reinforcing rib 6 is made of aluminum alloy (preferably 6061-T6 aluminum alloy). After heat treatment, this material has a tensile strength of over 260 MPa, a yield strength of ≥240 MPa, and an elastic modulus of 69 GPa. It combines high strength with lightweight characteristics (density 2.7 g / cm³). Compared to traditional steel reinforcing ribs, the aluminum alloy material reduces weight by 60%, while still meeting the bending stiffness requirements for supporting the sealing strip (bending modulus ≥60 GPa). Its surface has a natural shape. The formed alumina passivation film (2-5μm thick) has excellent corrosion resistance and is not prone to rusting in humid or salt spray environments. It can form good electrochemical compatibility with low-temperature resistant silicone rubber substrate, avoiding corrosion failure caused by contact with heterogeneous materials. The cross-sectional shape is optimized to "I" shape through finite element analysis, which increases the bending strength by 30% compared with the rectangular cross-section under the same weight. This ensures that the reinforcing rib 6 can provide stable structural support for the substrate in temperature cycling from -40℃ to 80℃, preventing the sealing strip from deforming and failing due to external pressure or low-temperature shrinkage.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel sealing strip, comprising a body (1) and an adhesive layer (3), characterized in that: The adhesive layer (3) is disposed at the bottom of the body (1). The internal material of the body (1) includes a base layer (2), an anti-ultraviolet coating (4) and a hydrophobic coating (5). One side of the base layer (2) is connected to one side of the anti-ultraviolet coating (4), and the other side of the anti-ultraviolet coating (4) is connected to one side of the hydrophobic coating (5). The base layer (2) is provided with reinforcing ribs (6). Several reinforcing ribs (6) are provided and are evenly arranged in the base layer (2). The base layer (2) is also provided with a flexible heating wire (7). One end of the flexible heating wire (7) is connected to one end of the wire (8), and the other end of the wire (8) extends out of the base layer (2).

2. The novel sealing strip according to claim 1, characterized in that: An elastic ring (9) is fitted on the body (1). Multiple elastic rings (9) are provided, and the inner wall of the elastic ring (9) tightly abuts against the outer wall of the body (1).

3. The novel sealing strip according to claim 2, characterized in that: The elastic ring (9) is made of rubber.

4. A novel sealing strip according to claim 3, characterized in that: The base layer (2) is made of low-temperature resistant silicone rubber.

5. A novel sealing strip according to claim 4, characterized in that: The reinforcing rib (6) is made of aluminum alloy.

Images