Soundproofing and waterproofing membrane for automotive doors

Abstract

The utility model provides a sound insulation waterproof membrane for car door, including waterproof membrane body and fixed on the sound insulation layer of waterproof membrane body, be equipped with a plurality of wire harness holes on the waterproof membrane body, waterproof membrane body, sound insulation layer all adopt hot melt material to make, be equipped with annular main welding area on the waterproof membrane body, sound insulation layer with waterproof membrane body in main welding area passes through hot melt welding fixed. The utility model discloses a sound insulation waterproof membrane for car door, including waterproof membrane body and fixed on the sound insulation layer of waterproof membrane body, be equipped with a plurality of wire harness holes on the waterproof membrane body, waterproof membrane body, sound insulation layer all adopt hot melt material to make, be equipped with annular main welding area on the waterproof membrane body, sound insulation layer with waterproof membrane body in main welding area passes through hot melt welding fixed. The utility model discloses a sound insulation waterproof membrane for car door, including waterproof membrane body and fixed on the sound insulation layer of waterproof membrane body, be equipped with a plurality of wire harness holes on the waterproof membrane body, waterproof membrane body, sound insulation layer all adopt hot melt material to make, be equipped with annular main welding area on the waterproof membrane body, sound insulation layer with waterproof membrane body in main welding area passes through hot melt welding fixed.

Description

Technical Field

[0001] This utility model relates to the field of waterproof membrane technology for car doors, and in particular to a soundproof and waterproof membrane for car doors. Background Technology

[0002] With the continuous development of the automotive industry, users have increasingly higher requirements for vehicle quality, especially in terms of ride comfort and NVH (noise, vibration, and harshness) performance. As an important part of the vehicle, car doors often have a waterproof membrane attached to their interior. This membrane is mainly used to prevent liquids from splashing between the inner and outer door panels or seeping into the interior trim, thus providing waterproofing, moisture protection, and sound insulation.

[0003] Currently, most common automotive door soundproofing and waterproofing membranes on the market employ a structure where the sound-absorbing layer is fixed to the surface of the waterproof membrane using adhesives to achieve both sound insulation and waterproofing functions. However, this method has significant drawbacks: under complex usage environments such as long-term vibration and temperature and humidity changes, the adhesive structure is prone to adhesive failure or interlayer peeling, leading to a decrease in sound insulation performance and affecting the overall sealing and service life of the car door. Utility Model Content

[0004] This invention proposes a soundproof and waterproof membrane for automobile doors, which solves the problem that the existing technology of bonding the sound-absorbing layer to the surface of the waterproof membrane of automobile doors with adhesives is prone to problems such as adhesion failure or interlayer peeling under complex usage environments such as long-term vibration and temperature and humidity changes.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a soundproof and waterproof membrane for automobile doors, including a waterproof membrane body and a soundproof layer fixed on the waterproof membrane body. The waterproof membrane body is provided with a plurality of wire harness holes. Both the waterproof membrane body and the soundproof layer are made of hot melt material. The waterproof membrane body is provided with an annular main welding area. The soundproof layer and the waterproof membrane body are fixed in the main welding area by hot melt welding.

[0007] Specifically, the outer contour of the main welding area matches the outer contour of the sound insulation layer.

[0008] Preferably, the waterproof membrane body is further provided with at least one secondary welding area, and the sound insulation layer and the waterproof membrane body are fixed in the secondary welding area by hot melt welding.

[0009] Optionally, the sound insulation layer and the waterproof membrane body are bonded and fixed in the non-welded area by an adhesive.

[0010] Preferably, the main welding area has at least one notch at the position corresponding to the bottom of the car door, and the notch allows moisture to drain between the waterproof membrane body and the sound insulation layer.

[0011] Optionally, the waterproof membrane body may be made of thermoplastic polyolefin, thermoplastic polyurethane, polyethylene or polyvinyl chloride.

[0012] Preferably, the sound insulation layer is made of butyl rubber.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] (1) This utility model sets an annular main welding area on the waterproof membrane body and uses hot melt welding process to weld and fix the sound insulation layer to the waterproof membrane body in the main welding area, replacing the traditional adhesive bonding method. This effectively enhances the bonding strength and stability between the sound insulation layer and the waterproof membrane body, overcomes the problem of interlayer peeling that is easy to occur in complex environments such as vibration and temperature and humidity changes, thereby extending the service life of the product and ensuring continuous sound insulation and waterproof performance.

[0015] (2) By setting up an annular main welding area and matching the outer contour of the area with the edge of the sound insulation layer, this utility model achieves a firm seal between the edge area of ​​the sound insulation layer and the waterproof membrane body, effectively preventing moisture from entering from the edge and improving the overall sealing performance.

[0016] (3) By adding at least one secondary welding area to the waterproof membrane body, this utility model enhances the connection strength between the sound insulation layer and the waterproof membrane body in the middle or key areas, avoids local warping or separation caused by vibration, and further improves the structural stability of the product in long-term use.

[0017] (4) By setting a drainage gap at the position corresponding to the bottom of the door in the main welding area, this utility model allows water that may seep into the two layers to be discharged smoothly, avoiding problems such as adhesion failure caused by water accumulation, and further enhancing the durability and waterproof reliability of the product. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a front structural diagram of a soundproof and waterproof membrane for automobile doors according to the present invention.

[0020] Figure 2 This is a schematic diagram of the back structure of a soundproof and waterproof membrane for automobile doors according to the present invention.

[0021] In the diagram: 1. Waterproof membrane body; 2. Sound insulation layer; 3. Wiring harness hole; 4. Main welding area; 5. Secondary welding area; 6. Non-welding area; 7. Notch. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to its embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figure 1 , 2 This utility model provides a soundproof and waterproof membrane for automobile doors, including a waterproof membrane body 1 and a soundproof layer 2 fixed on the waterproof membrane body 1. The waterproof membrane body 1 is provided with a plurality of wire harness holes 3. The waterproof membrane body 1 and the soundproof layer 2 are both made of hot melt material. The waterproof membrane body 1 is provided with an annular main welding area 4. The soundproof layer 2 and the waterproof membrane body 1 are fixed in the main welding area 4 by hot melt welding.

[0024] This invention provides a ring-shaped main welding area 4 on the waterproof membrane body 1, and uses a hot-melt welding process to weld and fix the sound insulation layer 2 to the waterproof membrane body 1 in the main welding area 4, replacing the traditional adhesive bonding method. This effectively enhances the bonding strength and stability between the sound insulation layer 2 and the waterproof membrane body 1, overcomes the problem of interlayer delamination that easily occurs in complex environments such as vibration and temperature and humidity changes, thereby extending the product's service life and ensuring continuous sound insulation and waterproof performance.

[0025] Specifically, such as Figure 1 , 2 As shown, the outer contour of the main welding area 4 matches the outer contour of the sound insulation layer 2. By setting the annular main welding area 4 and matching the outer contour of this area with the edge of the sound insulation layer 2, a firm seal is achieved between the edge area of ​​the sound insulation layer 2 and the waterproof membrane body 1, effectively preventing moisture from intruding from the edge and improving the overall sealing performance.

[0026] Preferably, such as Figure 1 As shown, the waterproof membrane body 1 is also provided with at least one secondary welding area 5, and the sound insulation layer 2 and the waterproof membrane body 1 are fixed in the secondary welding area 5 by hot melt welding; by adding at least one secondary welding area 5 to the waterproof membrane body 1, the connection strength between the sound insulation layer 2 and the waterproof membrane body 1 in the middle or key area is enhanced, avoiding local warping or separation caused by vibration, and further improving the structural stability of the product in long-term use.

[0027] In this embodiment, the sub-welding area 5 is designed to be a ring-shaped "runway". In the specific implementation process, it can also be designed to be a "straight line", "curved line" or other shapes. This embodiment does not make any specific limitations.

[0028] In the specific implementation process, an annular welding area can also be set at the position of the wire harness hole 3 in the area covered by the sound insulation layer 2 to further prevent moisture from seeping into the space between the sound insulation layer 2 and the waterproof membrane body 1 from the wire harness hole 3.

[0029] Optionally, the sound insulation layer 2 and the waterproof membrane body 1 are bonded and fixed in the non-welding area 6 by an adhesive. By using an adhesive to assist in fixing in the non-welding area 6, the bonding force of the full coverage is ensured, making the combination of the sound insulation layer 2 and the waterproof membrane body 1 more comprehensive and reliable.

[0030] Preferably, such as Figure 1 As shown, the main welding area 4 is provided with at least one notch 7 at the position corresponding to the bottom of the car door. The notch 7 allows water to drain between the waterproof membrane body 1 and the sound insulation layer 2. By providing a drainage notch 7 at the position corresponding to the bottom of the car door in the main welding area 4, water that may seep between the two layers can be drained smoothly, avoiding problems such as adhesion failure caused by water accumulation, and further enhancing the durability and waterproof reliability of the product.

[0031] Optionally, the waterproof membrane body 1 can be made of thermoplastic polyolefin, thermoplastic polyurethane, polyethylene or polyvinyl chloride. In specific implementation, it can also be made of other materials with similar properties.

[0032] Preferably, the sound insulation layer 2 is made of butyl rubber. In practice, other materials with similar properties can also be used.

[0033] In this embodiment, the waterproof membrane body 1 is made of thermoplastic material, which ensures good weldability and waterproofness; the sound insulation layer 2 is preferably butyl rubber, which takes into account both sound insulation and hot melt compatibility, together ensuring the effective implementation of the hot melt welding process and the comprehensive performance of the final product.

[0034] The manufacturing process of the soundproof and waterproof membrane in this embodiment is as follows:

[0035] A waterproof membrane body 1 and a sound insulation layer 2 are prepared separately. The waterproof membrane body 1 is made of a heat-fusible material (such as TPO, TPU, PE, PVC) and the required wire harness holes 3 are pre-punched out. The sound insulation layer 2 is made of a material with similar heat-fusible properties (such as butyl rubber) and the required wire harness holes 3 are also pre-punched out.

[0036] Design and position the main welding area 4 (ring-shaped) and secondary welding areas 5 (one or more, which can be ring-shaped, straight, etc.) on the waterproof membrane body 1. Cover the sound insulation layer 2 on the predetermined position of the waterproof membrane body 1, and use a special hot melt welding device (such as a hot air gun) to heat the main welding area 4, so that the contact surface of the two layers of materials melts and fuses into one piece under pressure (such as by rolling with pressure rollers). After cooling, a continuous and sealed ring-shaped welding strip is formed (two notches 7 are reserved in the ring-shaped main welding area 4 corresponding to the bottom position after the door is installed. These two notches 7 are not welded and are used to drain any water that may seep in during subsequent use).

[0037] Similarly, the secondary welding area 5 is hot-melt welded to provide additional reinforcement points in the middle or critical areas of the sound insulation layer 2 to prevent warping and vibration peeling.

[0038] In the non-welding area 6, in order to ensure that the sound insulation layer 2 is completely bonded to the waterproof membrane body 1, an adhesive may be used for auxiliary bonding and fixing (this step needs to be completed before the hot melt welding process in the main welding area 4).

[0039] The installation method of the soundproof and waterproof membrane in this embodiment is as follows:

[0040] Cover the inner door panel with the prepared soundproof and waterproof membrane, ensuring that the wiring harness hole 3 on the waterproof membrane body 1 is aligned with the wiring harness outlet on the inner door panel, allowing the electrical wiring harness inside the door to pass through smoothly. Use adhesive, clips, or other methods to fix the waterproof membrane body 1 to the inner door panel, achieving a vehicle-wide waterproof seal.

[0041] In this embodiment, during use, the waterproof membrane body 1 acts as the main barrier, preventing external liquids from entering the inside of the door. It is tightly bonded and fixed to the inner door panel, ensuring a tight seal. The high-density sound insulation layer 2 (such as butyl rubber) effectively suppresses vibrations of the door panel, absorbs and blocks noise, and improves the vehicle's NVH performance. Even if a small amount of moisture seeps between the waterproof membrane body 1 and the inner door panel, or exists between the waterproof membrane body 1 and the sound insulation layer 2 due to condensation, this liquid can flow downwards along the gap between the two layers and eventually drain smoothly through the drainage gap 7 at the bottom of the main welding area 4, thereby avoiding internal water accumulation and the resulting failure problems.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A soundproof and waterproof membrane for automobile doors, comprising a waterproof membrane body (1) and a soundproof layer (2) fixed on the waterproof membrane body (1), wherein the waterproof membrane body (1) is provided with a plurality of wire harness holes (3), characterized in that, The waterproof membrane body (1) and the sound insulation layer (2) are both made of hot melt material. The waterproof membrane body (1) is provided with an annular main welding area (4). The sound insulation layer (2) and the waterproof membrane body (1) are fixed in the main welding area (4) by hot melt welding.

2. The soundproof and waterproof membrane for automobile doors as described in claim 1, characterized in that, The outer contour of the main welding area (4) matches the outer contour of the sound insulation layer (2).

3. The soundproof and waterproof membrane for automobile doors as described in claim 1, characterized in that, The waterproof membrane body (1) is also provided with at least one secondary welding area (5), and the sound insulation layer (2) and the waterproof membrane body (1) are fixed in the secondary welding area (5) by hot melt welding.

4. The soundproof and waterproof membrane for automobile doors as described in claim 1, characterized in that, The sound insulation layer (2) and the waterproof membrane body (1) are bonded and fixed in the non-welding area (6) by an adhesive.

5. The soundproof and waterproof membrane for automobile doors as described in claim 1, characterized in that, The main welding area (4) is provided with at least one notch (7) at the position corresponding to the bottom of the car door, and the notch (7) allows moisture to drain between the waterproof membrane body (1) and the sound insulation layer (2).

6. The soundproof and waterproof membrane for automobile doors as described in claim 1, characterized in that, The waterproof membrane body (1) is made of thermoplastic polyolefin, thermoplastic polyurethane, polyethylene or polyvinyl chloride.

7. The soundproof and waterproof membrane for automobile doors as described in claim 1, characterized in that, The sound insulation layer (2) is made of butyl rubber.

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