Automotive interior composite skin

Abstract

The utility model relates to the field of automobile interior composite technology discloses an automobile interior composite skin, from bottom to top includes base cloth layer, first adhesive layer, base material layer, second adhesive layer, buffer layer, third adhesive layer, thermoplastic polyurethane layer, antibacterial antifouling coating in proper order, the base cloth layer and base material layer are glued through first adhesive layer. The automobile interior composite skin, by setting up the buffer layer to be natural rubber material, has good buffering effect, and then improves the anti -impact effect of skin, the "honeycomb type" cavity set up in buffer layer not only can save the cost and reduce the weight of skin, but also can utilize the gas in the cavity to buffer the force received when impacting, further enhances the anti -impact effect of skin, through the equal distance setting of multiple groups of guide broken groove on the upper surface of thermoplastic polyurethane layer, can when the vehicle collision, automobile interior skin tears according to the guide broken groove setting path, thereby avoiding the splashing of the debris, causes secondary injury to the user.

Description

Technical Field

[0001] This utility model relates to the field of automotive interior composite technology, specifically to an automotive interior composite skin. Background Technology

[0002] Automotive door interior trim is a major component of automotive interior parts. Currently, the main manufacturing processes for interior trim include direct injection molding, vacuum forming, and low-pressure injection molding. To meet passenger comfort needs, interior trim requires excellent tactile, manual, visual, and odor qualities, while also ensuring that passenger health is not negatively impacted. Therefore, the environmental friendliness of interior materials is crucial. While direct injection molding interior trim is inexpensive, it often fails to meet customer comfort requirements. Leather made using vacuum forming and low-pressure injection molding currently includes pure PVC foam sheets, single-layer PVC calendered sheets, and PVC powder coating. These materials generally suffer from poor comfort and substandard environmental performance.

[0003] Chinese Utility Model Patent Publication No. CN203805443U discloses a composite surface for automotive interior trim. This composite surface uses a polyurethane layer as the adhesive medium, which not only improves its environmental friendliness but also cleans the production environment and increases production efficiency. It uses a polyethylene-polypropylene layer and a polyolefin layer as the composite underlayer, improving comfort and sound insulation. A water-based polyurethane layer achieves a matte finish, making the surface more comfortable. However, this composite surface lacks a buffer layer, which could cause serious injury to the user in a collision. Furthermore, the absence of fracture guide seams makes it prone to fragmentation during a collision, potentially causing secondary injuries. Therefore, its practicality is poor. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a composite surface skin for automotive interiors, which can effectively solve the problems in the prior art.

[0005] The technical solution adopted by this utility model is: a composite surface for automotive interior trim, comprising, from bottom to top, a base fabric layer, a first adhesive layer, a substrate layer, a second adhesive layer, a buffer layer, a third adhesive layer, a thermoplastic polyurethane layer, and an antibacterial and antifouling coating. The base fabric layer and the substrate layer are bonded together by the first adhesive layer, the substrate layer and the buffer layer are bonded together by the second adhesive layer, and the thermoplastic polyurethane layer and the buffer layer are bonded together by the third adhesive layer. The antibacterial and antifouling coating is uniformly applied to the upper surface of the thermoplastic polyurethane layer, and a guide groove is provided at one end of the thermoplastic polyurethane layer near the antibacterial and antifouling coating.

[0006] Preferably, the first adhesive layer, the second adhesive layer, and the third adhesive layer are all made of water-based polyurethane.

[0007] Through the above technical solutions, waterborne polyurethane material uses water as the dispersion medium, does not contain organic solvents such as benzene and ketones, reduces air pollution inside the vehicle, does not require phthalate plasticizers, avoids the release of harmful substances to the health of passengers after long-term use, and the production wastewater and water from cleaning equipment can be directly treated, reducing environmental governance costs. At the same time, waterborne polyurethane material has good durability, which can effectively improve the service life of automotive interior surfaces.

[0008] Preferably, the antibacterial and antifouling coating is a nano-silver ion antibacterial coating, and the thickness of the antibacterial and antifouling coating is 3-5 μm.

[0009] Through the above technical solution, the antibacterial and antifouling coating adopts a nano silver ion antibacterial coating. The nano silver ion antibacterial coating has a strong antibacterial and bactericidal effect, thereby enhancing the antibacterial and bactericidal effect of the skin and improving the safety of the skin during use.

[0010] Preferably, the base fabric layer is made of non-woven fabric and the thickness of the base fabric layer is 0.3 to 0.5 mm.

[0011] Through the above technical solutions, non-woven fabrics have a low density and are 20%-40% lighter than traditional woven fabrics, which helps to reduce the weight of the whole vehicle. They are produced directly through fiber web forming process, eliminating the spinning and weaving process. The material cost is 30%-50% lower than that of woven fabrics. Furthermore, the use of non-woven fabrics can effectively improve the strength and tear resistance of the interior surface.

[0012] Preferably, the substrate layer is made of polypropylene and the thickness of the substrate layer is 1.2 mm to 2.5 mm.

[0013] Through the above technical solution, polypropylene material has good corrosion resistance and does not contain halogens / heavy metals. When burned, it only releases CO2 and H2O, which further improves its environmental friendliness. At the same time, as a door panel substrate, it does not age even after long-term contact with cleaning agents, which further extends the service life of the interior surface.

[0014] Preferably, the guide grooves are arranged in multiple identical groups, and the multiple groups of guide grooves are located on the top of the thermoplastic polyurethane layer and are distributed at equal intervals.

[0015] By using the above technical solution, multiple sets of guide grooves are set at equal intervals on the upper surface of the thermoplastic polyurethane layer. When a vehicle collision occurs, the interior skin of the car will tear along the path set by the guide grooves, thereby avoiding the flying of fragments and causing secondary injury to the user.

[0016] Preferably, the buffer layer is made of natural rubber, and several "honeycomb" cavities are reserved at equal intervals on the inner side of the buffer layer.

[0017] Through the above technical solution, by setting the buffer layer to be made of natural rubber, which is not only non-toxic and harmless, but also has a good buffering effect, thereby improving the impact resistance of the skin. The "honeycomb" cavity set in the buffer layer can not only save costs and reduce the weight of the skin, but also use the gas in the cavity to buffer the force received during the impact, further enhancing the impact resistance of the skin.

[0018] Compared with the prior art, this utility model provides a composite surface skin for automotive interiors, which has the following beneficial effects:

[0019] 1. The composite surface of the car interior uses a buffer layer made of natural rubber. Natural rubber is not only non-toxic and harmless, but also has a good buffering effect, which improves the impact resistance of the surface. The "honeycomb" cavity in the buffer layer not only saves costs and reduces the weight of the surface, but also uses the gas in the cavity to buffer the force received during the impact, further enhancing the impact resistance of the surface.

[0020] 2. This automotive interior composite skin, by setting multiple sets of guide grooves at equal intervals on the upper surface of the thermoplastic polyurethane layer, can tear the automotive interior skin according to the set path of the guide grooves when the vehicle is in collision, thereby avoiding the flying of fragments and causing secondary injury to the user;

[0021] 3. The composite surface of this automotive interior features an antibacterial and anti-fouling coating made of nano-silver ions. This nano-silver ion antibacterial coating has extremely strong antibacterial and bactericidal effects, thereby enhancing the antibacterial and bactericidal effects of the surface and improving the safety of the surface during use. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the main cross-sectional structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the disassembled structure of the interior skin of this utility model;

[0026] Figure 5 This is a three-dimensional structural diagram of the buffer layer and thermoplastic polyurethane layer of this utility model.

[0027] The components are: 1. base fabric layer; 2. first adhesive layer; 3. substrate layer; 4. second adhesive layer; 5. buffer layer; 6. third adhesive layer; 7. thermoplastic polyurethane layer; 8. antibacterial and antifouling coating; 9. guide groove. Detailed Implementation

[0028] 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.

[0029] Example 1: As Figure 1-5 As shown, the present invention provides a composite surface for automotive interior trim, comprising, from bottom to top, a base fabric layer 1, a first adhesive layer 2, a substrate layer 3, a second adhesive layer 4, a buffer layer 5, a third adhesive layer 6, a thermoplastic polyurethane layer 7, and an antibacterial and antifouling coating 8. The base fabric layer 1 and the substrate layer 3 are bonded together by the first adhesive layer 2, the substrate layer 3 and the buffer layer 5 are bonded together by the second adhesive layer 4, the thermoplastic polyurethane layer 7 and the buffer layer 5 are bonded together by the third adhesive layer 6, and the antibacterial and antifouling coating 8 is uniformly coated on the upper surface of the thermoplastic polyurethane layer 7. A guide groove 9 is provided at one end of the thermoplastic polyurethane layer 7 near the antibacterial and antifouling coating 8.

[0030] Specifically, the first adhesive layer 2, the second adhesive layer 4, and the third adhesive layer 6 are all made of water-based polyurethane. The advantages are that water-based polyurethane uses water as the dispersion medium, does not contain organic solvents such as benzene and ketones, reducing air pollution inside the vehicle; it eliminates the need for phthalate plasticizers, avoiding the release of harmful substances that could harm passenger health after long-term use; and the production wastewater and water from cleaning equipment can be directly treated, reducing environmental remediation costs. Furthermore, water-based polyurethane has excellent durability, effectively extending the lifespan of automotive interior trim.

[0031] Specifically, the antibacterial and antifouling coating 8 uses a nano-silver ion antibacterial coating, and the thickness of the antibacterial and antifouling coating 8 is 3-5 μm. The advantage is that the nano-silver ion antibacterial coating has extremely strong antibacterial and bactericidal effects, thereby enhancing the antibacterial and bactericidal effect of the surface and improving the safety of the surface during use.

[0032] Specifically, the base fabric layer 1 is made of non-woven fabric, and its thickness is 0.3-0.5mm. The advantages are that non-woven fabric has a low density, making it 20%-40% lighter than traditional woven fabric, which helps reduce the overall vehicle weight. It is produced directly through a fiber web-forming process, eliminating the spinning and weaving steps, resulting in material costs that are 30%-50% lower than woven fabrics. Furthermore, the use of non-woven fabric effectively improves the strength and tear resistance of the interior trim.

[0033] Example 2: Figure 2-5 As shown, this is an improvement on the previous embodiment.

[0034] Specifically, the substrate layer 3 is made of polypropylene, and its thickness is 1.2mm to 2.5mm. The advantages are that polypropylene has good corrosion resistance, is free of halogens / heavy metals, and releases only CO2 and H2O when burned, further improving its environmental friendliness. Furthermore, as a door panel substrate, it does not age even after prolonged contact with cleaning agents, further extending the service life of the interior trim.

[0035] Specifically, multiple sets of guide grooves 9 are provided, and these multiple sets of guide grooves 9 are located on the top of the thermoplastic polyurethane layer 7 and are distributed at equal intervals. The advantage is that by setting multiple sets of guide grooves 9 at equal intervals on the upper surface of the thermoplastic polyurethane layer 7, the interior trim of the car can tear along the path set by the guide grooves 9 when a vehicle collision occurs, thereby avoiding the splashing of fragments and secondary injuries to passengers.

[0036] Specifically, the buffer layer 5 is made of natural rubber, and several honeycomb-shaped cavities are evenly spaced on the inner side of the buffer layer 5. The advantage is that by using natural rubber for the buffer layer 5, which is not only non-toxic and harmless but also has good cushioning properties, the impact resistance of the outer skin is improved. The honeycomb-shaped cavities within the buffer layer 5 not only save costs and reduce the weight of the outer skin but also utilize the gas within the cavities to buffer the force received during impact, further enhancing the impact resistance of the outer skin.

[0037] Working principle: In use, the substrate layer 3 is bonded to the upper surface of the base fabric layer 1 via the first adhesive layer 2. Then, the buffer layer 5 is bonded to the upper surface of the substrate layer 3 via the second adhesive layer 4. Next, the thermoplastic polyurethane layer 7 is bonded to the upper surface of the buffer layer 5 via the third adhesive layer 6 and embossed. Subsequently, an antibacterial and antifouling coating 8 is evenly applied to the surface of the thermoplastic polyurethane layer 7. The antibacterial and antifouling coating 8 uses a nano-silver ion antibacterial coating, which has extremely strong antibacterial and bactericidal effects, thereby enhancing the antibacterial and bactericidal effect of the skin and improving the safety of the skin during use. The first adhesive layer 2, the second adhesive layer 4, and the third adhesive layer 6 are all made of water-based polyurethane. Water-based polyurethane uses water as a dispersion medium and does not contain organic solvents such as benzene and ketones, reducing air pollution inside the vehicle. It eliminates the need for phthalate plasticizers, avoiding the release of harmful substances that could harm passenger health over long-term use. Furthermore, production wastewater and water from cleaning equipment can be directly treated, reducing environmental remediation costs. Water-based polyurethane also has excellent durability, effectively extending the lifespan of automotive interior surfaces. The base fabric layer 1 is made of non-woven fabric, which has a low density and is 20% lighter than traditional woven fabrics. -40%, contributing to overall vehicle weight reduction. Produced directly through fiber web forming, eliminating the spinning and weaving stages, material costs are 30%-50% lower than woven fabrics. Furthermore, the use of non-woven fabric effectively improves the strength and tear resistance of the interior surface. The base layer 3 is made of polypropylene, which has excellent corrosion resistance and is free of halogens / heavy metals, releasing only CO2 and H2O upon combustion, further enhancing environmental friendliness. Thermoplastic polyurethane is environmentally friendly and recyclable, with good surface abrasion resistance, suitable for high-frequency use, further improving the aging resistance of the automotive interior surface. Multiple sets of guide grooves 9 are evenly spaced on the upper surface of the plastic polyurethane layer 7. When a vehicle collision occurs, the interior skin of the car will tear along the path set by the guide grooves 9, thereby avoiding the flying of fragments and causing secondary injury to the user. Furthermore, by setting the buffer layer 5 to be made of natural rubber, which is not only non-toxic and harmless, but also has a good cushioning effect, the impact resistance of the skin is improved. The "honeycomb" cavity set in the buffer layer 5 not only saves costs and reduces the weight of the skin, but also uses the gas in the cavity to buffer the force received during the impact, further enhancing the impact resistance of the skin.

[0038] 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 composite surface for automotive interior trim, comprising, from bottom to top, a base fabric layer (1), a first adhesive layer (2), a substrate layer (3), a second adhesive layer (4), a buffer layer (5), a third adhesive layer (6), a thermoplastic polyurethane layer (7), and an antibacterial and antifouling coating (8), characterized in that: The base fabric layer (1) and the substrate layer (3) are bonded together by the first adhesive layer (2), the substrate layer (3) and the buffer layer (5) are bonded together by the second adhesive layer (4), the thermoplastic polyurethane layer (7) and the buffer layer (5) are bonded together by the third adhesive layer (6), the antibacterial and antifouling coating (8) is uniformly coated on the upper surface of the thermoplastic polyurethane layer (7), and a guide groove (9) is provided at one end of the thermoplastic polyurethane layer (7) near the antibacterial and antifouling coating (8).

2. The automotive interior composite skin according to claim 1, characterized in that: The first adhesive layer (2), the second adhesive layer (4) and the third adhesive layer (6) are all made of water-based polyurethane.

3. The automotive interior composite skin according to claim 1, characterized in that: The antibacterial and antifouling coating (8) is a nano silver ion antibacterial coating, and the thickness of the antibacterial and antifouling coating (8) is 3-5 μm.

4. The automotive interior composite skin according to claim 1, characterized in that: The base fabric layer (1) is made of non-woven fabric and the thickness of the base fabric layer (1) is 0.3 to 0.5 mm.

5. The automotive interior composite skin according to claim 1, characterized in that: The substrate layer (3) is made of polypropylene and has a thickness of 1.2 mm to 2.5 mm.

6. The automotive interior composite skin according to claim 1, characterized in that: The guide grooves (9) are arranged in multiple sets, and the multiple sets of guide grooves (9) are located on the top of the thermoplastic polyurethane layer (7) and are distributed at equal intervals.

7. The automotive interior composite skin according to claim 1, characterized in that: The buffer layer (5) is made of natural rubber, and several "honeycomb" cavities are reserved at equal intervals on the inner side of the buffer layer (5).

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