Multi-layer composite vehicle ground mat with high sound absorption and insulation performance

Abstract

The utility model relates to a multi-layer composite vehicle floor mat with high sound absorption and insulation performance, which belongs to the technical field of automobile accessories and comprises a TPE (thermoplastic elastomer) surface layer, a PU (polyurethane) foaming layer and a PET (polyethylene terephthalate) sound insulation layer which are sequentially arranged from top to bottom. The top face of the PET sound insulation layer is further provided with a teflon waterproof breathable film which prevents foam from permeating downwards and improves foam flowability at the same time. The condition that the PU foaming layer permeates into the PET sound insulation layer in the foaming process is avoided through the polytetrafluoroethylene, meanwhile, in the permeation prevention process of the polytetrafluoroethylene waterproof breathable film, gas in the foaming layer can be discharged outwards, the flowability of the PU foaming layer is accelerated, the uniform PU foaming layer can be formed, and the service life of the PU foaming layer is prolonged. And the sound absorption and insulation performance is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories, in particular to a multi-layer composite vehicle floor mat with high sound absorption and insulation performance. Background Art

[0002] Car floor mats are an environmentally friendly car interior component that integrates multiple functions such as water absorption, dust absorption, dirt removal, sound insulation, and host protection.

[0003] The vacuuming function of car floor mats can effectively remove dust and debris from the carpet in the car, keeping the car clean. The surface of car floor mats is usually made of fiber material, which can absorb dust and debris from the carpet in the car, thereby preventing dust and debris from entering the car, reducing the exposure of drivers and passengers to dust, and improving driving safety. At the same time, car floor mats can also protect the carpet in the car, prevent the carpet from being scratched or worn, and extend the service life of the carpet in the car.

[0004] The sound insulation function of car floor mats can effectively reduce the noise inside the car and improve driving comfort. Car floor mats can effectively absorb the vibration and noise on the carpet inside the car, reduce the noise inside the car, and improve driving comfort. In addition, car floor mats can also prevent resonance inside the car, reduce the wear of car parts, and extend the service life of car parts.

[0005] As commercial vehicles develop towards high horsepower, the noise of the engine body is getting louder and louder, and the in-vehicle sound environment needs to be improved urgently; the car floor mat is the main sound insulation layer above the engine of commercial vehicles, and the sound absorption and insulation performance has a huge impact on the noise level in the car. In the existing technology, PU foaming is mostly used to improve the sound absorption and insulation performance, but PU foaming will penetrate into the adjacent layer and there is uneven foaming. Therefore, there is a need for a floor mat that can improve the acoustic environment of the cab and reduce the noise in the car.

[0006] Chinese patent CN202220658267.X discloses a new type of vehicle floor mat with high sound absorption and insulation performance, which comprises PVC leather, PU foam layer, PET sound insulation cotton and PE film from bottom to top; the structure forms a sound insulation-sound absorption-sound insulation distribution. In order to ensure the overall performance of the floor mat, and affected by the manufacturing process, there is an uneven foaming layer, which in turn affects the sound insulation performance. Utility Model Content

[0007] In order to solve the problem of poor sound absorption and insulation performance caused by penetration and unevenness of PU foaming, the utility model provides a multi-layer composite vehicle floor mat with high sound absorption and insulation performance.

[0008] The utility model is realized by the following technical solutions:

[0009] A multi-layer composite vehicle floor mat with high sound absorption and insulation performance comprises a TPE surface layer, a PU foaming layer and a PET sound insulation layer arranged in sequence from top to bottom; the top surface of the PET sound insulation layer is also provided with a polytetrafluoroethylene waterproof and breathable film which prevents the foam from penetrating downwards and increases the foam fluidity.

[0010] Polytetrafluoroethylene prevents the PU foam layer from penetrating into the PET sound insulation layer during the foaming process. At the same time, the polytetrafluoroethylene waterproof and breathable membrane helps to discharge the gas in the foaming layer while preventing the penetration, accelerates the fluidity of the PU foam layer, and then helps to form a uniform PU foam layer, thereby improving the sound absorption and insulation performance.

[0011] A further improvement of the utility model is that the upper surface of the polytetrafluoroethylene waterproof breathable membrane is a smooth surface, which helps to reduce the flow friction of the PU foaming layer during the foaming process.

[0012] A further improvement of the utility model is that the thickness of the TPE surface layer is 3.5-4 mm.

[0013] A further improvement of the utility model is that the thickness of the PU foaming layer is 20-25 mm.

[0014] A further improvement of the utility model is that the density of the PU foam layer is 60-80kg / m 3 .

[0015] A further improvement of the utility model is that the thickness of the PET sound insulation layer is 3-5 mm.

[0016] A further improvement of the utility model is that the density of the PET sound insulation layer is 1000-1300g / m 2 .

[0017] A further improvement of the utility model is that the thickness of the polytetrafluoroethylene waterproof breathable membrane is 0.1 mm.

[0018] A further improvement of the utility model is that the TPE surface layer is molded by mold injection molding.

[0019] A further improvement of the utility model is that the PET sound insulation layer and the polytetrafluoroethylene waterproof breathable membrane are integrally formed by compression molding.

[0020] It can be seen from the above technical scheme that the beneficial effect of the utility model is that polytetrafluoroethylene prevents the PU foam layer from penetrating into the PET sound insulation layer during the foaming process. At the same time, the polytetrafluoroethylene waterproof breathable membrane helps the gas in the foaming layer to be discharged to the outside in the process of preventing penetration, accelerates the fluidity of the PU foam layer, and then helps to form a uniform PU foam layer, thereby improving the sound absorption and insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the utility model, the drawings required for use in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0023] Figure 2 Insert test data for the specific implementation of the utility model Figure 1 .

[0024] In the attached figure: 1. TPE surface layer; 2. PU foam layer; 3. Polytetrafluoroethylene waterproof and breathable membrane; 4. PET sound insulation layer. DETAILED DESCRIPTION

[0025] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0026] As attached Figure 1 As shown, a multi-layer composite vehicle floor mat with high sound absorption and insulation performance comprises a TPE surface layer 1, a PU foaming layer 2 and a PET sound insulation layer 4 arranged in sequence from top to bottom; the TPE surface layer 1 has a thickness of 3.5-4 mm and is molded by mold injection.

[0027] The PET sound insulation layer 4 has a thickness of 3-5 mm and a surface density of 1000-1300 g / m 2 The PET sound insulation layer 4 and the polytetrafluoroethylene waterproof breathable membrane 3 are integrally formed by compression molding.

[0028] The top surface of the PET sound insulation layer 4 is also provided with a polytetrafluoroethylene waterproof breathable membrane 3 which prevents the foam from penetrating downward and increases the fluidity of the foam. The polytetrafluoroethylene waterproof breathable membrane 3 has a thickness of 0.1 mm and a smooth upper surface. Polytetrafluoroethylene prevents the PU foam layer 2 from penetrating into the PET sound insulation layer 4 during the foaming process. At the same time, the polytetrafluoroethylene waterproof breathable membrane 3 helps the gas in the foam layer to be discharged outward in the process of preventing penetration, helps to reduce the flow friction of the PU foam layer 2 during the foaming process, accelerates the fluidity of the PU foam layer 2, and then helps to form a uniform PU foam layer 2, thereby improving the sound absorption and insulation performance.

[0029] First, put the TPE surface layer 1 and the PET sound insulation layer 4 into the mold, and add a 20-25mm thick and 60-80kg / m 3 PU foam layer 2.

[0030] Refer to the attached Figure 2 As shown (1# is the existing floor mat structure in the background technology, 2# is the floor mat structure of this case), 1# is PVC+PU foam layer+PET sound insulation layer; 2# is TPE surface layer 1+PU foam layer 2+polytetrafluoroethylene waterproof breathable membrane 3+PET sound insulation layer 4; From the comparison of the insertion loss test results, it can be seen that: 2# The floor mat of this scheme improves the sound insulation by an average of 2-5dB in the entire frequency band.

[0031] The utility model discloses a multi-layer composite vehicle floor mat with high sound absorption and insulation performance. The polytetrafluoroethylene prevents the PU foam layer from penetrating into the PET sound insulation layer during the foaming process. Meanwhile, the polytetrafluoroethylene waterproof and breathable film helps to discharge the gas in the foam layer to the outside in the process of preventing the penetration, thereby accelerating the fluidity of the PU foam layer, and further helping to form a uniform PU foam layer, thereby improving the sound absorption and insulation performance.

[0032] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0033] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0034] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-layer composite vehicle floor mat with high sound absorption and insulation performance, characterized in that: It comprises a TPE surface layer (1), a PU foam layer (2) and a PET sound insulation layer (4) which are arranged in sequence from top to bottom; the top surface of the PET sound insulation layer (4) is also provided with a polytetrafluoroethylene waterproof and breathable membrane (3) which prevents foam from penetrating downwards and increases foam fluidity.

2. The multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 1, characterized in that: The upper surface of the polytetrafluoroethylene waterproof and breathable membrane (3) is a smooth surface.

3. A multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 1 or 2, characterized in that: The TPE surface layer (1) has a thickness of 3.5-4 mm.

4. A multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 1 or 2, characterized in that: The PU foam layer (2) has a thickness of 20-25 mm.

5. The multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 4, characterized in that: The surface density of the PU foam layer (2) is 60-80 kg / m 3 .

6. A multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 1 or 2, characterized in that: The PET sound insulation layer (4) has a thickness of 3-5 mm.

7. The multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 6, characterized in that: The PET sound insulation layer (4) has a surface density of 1000-1300 g / m 2 .

8. A multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 1 or 2, characterized in that: The polytetrafluoroethylene waterproof and breathable membrane (3) has a thickness of 0.1 mm.

9. The multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 1, characterized in that: The TPE surface layer (1) is molded by injection molding.

10. The multi-layer composite vehicle floor mat with high sound absorption and insulation performance according to claim 1, characterized in that: The PET sound insulation layer (4) and the polytetrafluoroethylene waterproof breathable membrane (3) are integrally formed by compression molding.

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