Waterproof membrane structure for vehicle

Abstract

The utility model discloses a waterproof membrane structure for a vehicle, which comprises a water-based adhesive arranged along the edge of the appearance of a polyethylene waterproof membrane, and the water-based adhesive extends towards the inner part of the polyethylene waterproof membrane for a certain distance. According to the waterproof membrane structure for the vehicle, butyl rubber is replaced by the water-based adhesive, so that the waterproof membrane structure for the vehicle can be suitable for being installed at the environment temperature lower than that of the butyl rubber.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile interior decoration, especially to a waterproof film structure for vehicle. BACKGROUND

[0002] The plastic film for vehicle has the functions of moisture-proof, dust-proof, sound insulation and air leakage prevention, and is mainly used to prevent water droplets from splashing on the interior panel of the vehicle door, thereby preventing the corrosion and damage of the interior panel.

[0003] 1. The vehicle door requires good sealing performance, dust-proof, waterproof and sound insulation. In addition to the reasonable size cooperation between the vehicle door and the vehicle body, the important thing is the sealing strip embedded or pasted on the vehicle frame and the vehicle door. The sealing strip is a hollow-shaped rubber product, and its softness enables it to fill spaces with different gap sizes. When the gap is large, the sealing strip is squeezed small, and when the gap is small, the sealing strip is squeezed large.

[0004] 2. The sealing performance is an important indicator of the overall quality of the vehicle, and the automobile sealing strip product is one of the important parts that determines the quality of this indicator. It is widely used in the vehicle body parts such as front and rear windshields, doors, windows, engine compartments and trunks, and fills the gaps between the vehicle body parts, has the functions of shock absorption, waterproof, dustproof, sound insulation, decoration, etc., and plays a maintenance role for the driver and passengers and the whole vehicle.

[0005] The butyl rubber waterproof film can achieve the effects of waterproof, dustproof and sound insulation for the vehicle door. The waterproof sealing adhesive tape of butyl rubber is made of butyl rubber and polyisobutylene as main raw materials, and is an environmentally friendly solvent-free sealing adhesive material produced by using special production formula and the latest patented technology and selecting high-quality special polymer materials (imported). Butyl rubber has the advantages of strong oil and corrosion resistance, good weather resistance and wide application field, but due to the characteristics of butyl rubber, it is difficult to bond in low temperature environment. Butyl rubber has the characteristics of glue, and the assembly environment should be higher than 8℃ to normally assemble (the working environment temperature of butyl rubber is between 5℃ and 45℃, which cannot meet the low temperature assembly condition). If the assembly temperature cannot meet the requirement, the butyl rubber needs to be heated to fully soften before being pasted. If there is an operation error during the pasting process, the secondary assembly cannot be carried out.

[0006] Therefore, it has become one of the problems to be solved in the industry to solve the problem that butyl rubber cannot be normally pasted in low temperature state.

[0007] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the present utility model and is not intended to be a recognition or a suggestion that this information forms a prior art that is already known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0008] The utility model discloses a waterproof membrane structure for vehicle, which adopts water-based adhesive to adapt to lower environmental temperature installation than butyl adhesive.

[0009] To achieve the above object, the utility model provides a waterproof membrane structure for vehicle, including the water-based adhesive that is arranged along the profile edge of polyethylene waterproof membrane, and the water-based adhesive extends a distance to the inside of polyethylene waterproof membrane.

[0010] In a preferred embodiment, the water-based adhesive is printed on the corona surface of the polyethylene waterproof membrane.

[0011] In a preferred embodiment, the outer edge of the water-based adhesive is smaller than the outer edge of the polyethylene waterproof membrane.

[0012] In a preferred embodiment, the waterproof membrane structure for vehicle further comprises a plurality of carrying hands, and the plurality of carrying hands are arranged on the edge of the polyethylene waterproof membrane and extend outwardly a distance.

[0013] In a preferred embodiment, the shape of the carrying hand comprises a rectangle, a triangle, a semicircle or a circular arc.

[0014] In a preferred embodiment, the waterproof membrane structure for vehicle further comprises a plurality of positioning points, and the plurality of positioning points are arranged at the corner of the outer edge of the polyethylene waterproof membrane and are located within the inner edge of the water-based adhesive, and the plurality of positioning points are used to be installed in an aligned manner with a plurality of positioning points of the inner panel of the automobile.

[0015] In a preferred embodiment, the waterproof membrane structure for vehicle further comprises a wire harness port, and the wire harness port is arranged in the middle of the polyethylene waterproof membrane and is located within the inner edge of the water-based adhesive.

[0016] In a preferred embodiment, the waterproof membrane structure for vehicle further comprises a protective film, and the protective film is arranged on the side of the polyethylene waterproof membrane away from the corona surface, and the outer edge of the protective film is greater than the outer edge of the polyethylene waterproof membrane and the outer edge of the plurality of carrying hands.

[0017] In a preferred embodiment, the working environmental temperature of the water-based adhesive is between -25℃ and 80℃.

[0018] In a preferred embodiment, the adhesive strength data of the waterproof membrane structure for vehicle is as follows:

[0019] The adhesive strength is greater than or equal to 6N under the environmental temperature and time of 25℃ / 5min to -10℃ / 5min;

[0020] The adhesive strength is greater than or equal to 6N under the environmental temperature and time of 25℃ / 15min to -10℃ / 15min;

[0021] Adhesion strength ≥ 10 N at 25°C / 24h ambient temperature and time;

[0022] Adhesion strength ≥ 10 N at 25°C / 24h ambient temperature and time;

[0023] Adhesion strength ≥ 15 N at 23°C / 4h ambient temperature and time after three cycles of 80°C / 3h, 23°C / 0.5h, -30°C / 2h and 23°C / 0.5h ambient temperature and time.

[0024] Compared with the prior art, the waterproof film structure for vehicle has the following beneficial effects: the waterproof film structure for vehicle adopts water-based glue with lower installation temperature than butyl glue, so that the installation process of the waterproof film of the water-based glue is simpler (the installation time of the butyl waterproof film is about 3 minutes, and the installation time of the waterproof film of the water-based glue is usually between 30-50 seconds), the cost is lower, and the waterproof film of the water-based glue polyethylene is combined in the mode of film plus glue, and the weight of the combination has more advantages in vehicle weight reduction than the butyl waterproof film. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic view of the waterproof film structure for vehicle according to an embodiment of the utility model.

[0026] MAIN REFERENCE NUMERALS EXPLANATION:

[0027] 1-polyethylene waterproof film, 2-water-based glue, 3-pick up hand, 4-positioning point, 5-wire harness port, 6-protection film. DETAILED DESCRIPTION

[0028] The specific embodiments of the utility model will be described in detail below in combination with the drawings, but it should be understood that the protection scope of the utility model is not limited by the specific embodiments.

[0029] Unless otherwise explicitly indicated, in the entire specification and claims, the term "comprise" or its variants such as "include" or "comprising" and the like will be understood to include the stated element or component without excluding other elements or components.

[0030] As Figure 1 shown, according to the waterproof film structure for vehicle of the preferred embodiment of the utility model, water-based glue 2 is arranged along the outer edge of polyethylene waterproof film 1, and water-based glue 2 extends to the inside of polyethylene waterproof film 1 by a distance, the width of water-based glue 2 is generally about 25mm±5mm, and is different according to the different specifications of the waterproof film structure for vehicle.

[0031] In some embodiments, water-based glue 2 is printed (screen printing) on the corona surface of polyethylene waterproof film 1.

[0032] In some embodiments, the outer edge of the water-based adhesive 2 is smaller than the outer edge of the polyethylene waterproof film 1, and the distance between them is generally about 5 mm.

[0033] In some embodiments, the waterproof film structure for vehicles further comprises a plurality of lifting handles 3 arranged on the edges of the polyethylene waterproof film 1 and extending outwardly by a certain distance. The shapes of the lifting handles 3 include various shapes such as rectangles, triangles, semicircles, or circular arcs, and the lifting handles 3 are mainly used for the convenience of the operators during installation.

[0034] In some embodiments, the waterproof film structure for vehicles further comprises a plurality of positioning points 4 arranged at the corners of the outer edge of the polyethylene waterproof film 1 and located within the inner edge of the water-based adhesive 2. The plurality of positioning points 4 are used to be installed in an aligned manner with the plurality of positioning points 4 of the automobile inner panel (electrophoretic steel plate).

[0035] In some embodiments, the waterproof film structure for vehicles further comprises a wire harness port 5 arranged in the middle of the polyethylene waterproof film 1 and located within the inner edge of the water-based adhesive 2. The wire harness port 5 is used for the passage of vehicle control lines, etc.

[0036] In some embodiments, the waterproof film structure for vehicles further comprises a protective film 6 arranged on the side of the polyethylene waterproof film 1 away from the corona surface. The outer edge of the protective film 6 is larger than the outer edge of the polyethylene waterproof film 1 and the outer edge of the plurality of lifting handles 3.

[0037] In some embodiments, the working environment temperature of the water-based adhesive 2 is between -25℃ and 80℃.

[0038] In some embodiments, the adhesive strength data of the waterproof film structure for vehicles is as follows (tested by a cold and hot cycle machine):

[0039] The adhesive strength is ≥6N under the environmental temperature and time of 25℃ / 5min to -10℃ / 5min;

[0040] The adhesive strength is ≥6N under the environmental temperature and time of 25℃ / 15min to -10℃ / 15min;

[0041] The adhesive strength is ≥10N under the environmental temperature and time of 25℃ / 24h;

[0042] The adhesive strength is ≥10N after being soaked in water at 25℃ for 72h and then being exposed to air for 2h;

[0043] The adhesive strength is ≥15N after three cycles of environmental temperature and time of 80℃ / 3h, 23℃ / 0.5h, -30℃ / 2h, and 23℃ / 0.5h, and then 23℃ / 4h.

[0044] In some embodiments, the installation and manufacturing process of the waterproof film structure for vehicles is as follows: the water-based glue 2 is printed on the corona surface of the polyethylene waterproof film 1 by screen printing. After the water-based glue 2 is fully dried by drying, the glue becomes transparent solid, and the adhesion reaches the maximum. The cured waterproof film is in the integrated state of film and glue, ensuring the integrity of the film and glue. The product is installed by aligning the inner sheet metal (electrophoretic steel plate) positioning point 4 with the product positioning point 4. After determining the positioning point 4, the product is attached to the sheet metal as a whole to achieve waterproofing and dustproofing. Furthermore, because the glue properties of the water-based glue 2 determine that it will not freeze at low temperatures, it can achieve better sound insulation.

[0045] In summary, the waterproof film structure for vehicles has the following advantages: the water-based glue used in the scheme has a lower installation temperature than butyl glue, which makes the installation process of the water-based glue waterproof film simpler (the installation time of butyl waterproof film is about 3 minutes, while the assembly time of water-based glue polyethylene waterproof film is usually between 30-50 seconds), and the cost is lower. The water-based glue polyethylene waterproof film is combined by film and glue, and the weight of this combination is more advantageous in vehicle weight reduction than butyl waterproof film.

[0046] The foregoing description of specific exemplary embodiments of the present application is intended to be illustrative only and is not intended to limit the present application to the precise forms described. Many modifications and variations are possible in light of the above teachings without departing from the spirit or essential characteristics of the present application. The exemplary embodiments are chosen and described in order to explain the principles of the present application and its practical application and to allow others skilled in the art to understand the present application for various exemplary embodiments with various modifications as are suited to the particular use contemplated. It is intended that the scope of the present application be defined by the claims and their equivalents.

Claims

1. A waterproofing membrane structure for vehicles, characterized by comprising: It includes a water-based adhesive that is disposed along the outer edge of the polyethylene waterproof membrane and extends a distance into the interior of the polyethylene waterproof membrane.

2. The waterproofing membrane structure for vehicles according to claim 1, wherein The water-based adhesive is printed on the corona-exposed surface of the polyethylene waterproof membrane.

3. The automotive waterproofing membrane structure of claim 1, wherein The outer edge of the water-based adhesive is smaller than the outer edge of the polyethylene waterproof membrane.

4. The automotive waterproofing membrane structure of claim 2, wherein It also includes multiple handles, which are set on the edge of the polyethylene waterproof membrane and extend outward for a distance.

5. The automotive waterproofing membrane structure of claim 4, wherein The handle can be rectangular, triangular, semi-circular, or arc-shaped.

6. The automotive waterproofing membrane structure of claim 1, wherein It also includes multiple positioning points, which are located at the corners of the outer edge of the polyethylene waterproof membrane and inside the inner edge of the water-based adhesive. These multiple positioning points are used for installation in an aligned manner with multiple positioning points of the automotive interior sheet metal.

7. The automotive waterproofing membrane structure of claim 1, wherein It also includes a wire harness opening, which is located in the middle of the polyethylene waterproof membrane and inside the inner edge of the water-based adhesive.

8. The automotive waterproofing membrane structure of claim 4, wherein It also includes a protective film disposed on the side of the polyethylene waterproof membrane facing away from the corona surface, wherein the outer edge of the protective film is larger than the outer edge of the polyethylene waterproof membrane and the outer edge of the plurality of handles.

9. The automotive waterproofing membrane structure of claim 1, wherein The working environment temperature of the water-based adhesive is between -25℃ and 80℃.

10. The automotive waterproofing membrane structure of claim 9, wherein The adhesive strength data for the aforementioned automotive waterproof membrane structure are as follows: At an ambient temperature and time ranging from 25℃ / 5min to -10℃ / 5min, the adhesive strength is ≥6N; At ambient temperatures and times ranging from 25℃ / 15min to -10℃ / 15min, the adhesive strength is ≥6N; At an ambient temperature and time of 25℃ / 24h, the adhesive strength is ≥10N; After soaking in water at 25°C for 72 hours and then in air for 2 hours, the adhesive strength is ≥10N; After three cycles of ambient temperature and time of 80℃ / 3h, 23℃ / 0.5h, -30℃ / 2h, and 23℃ / 0.5h, the adhesive strength was ≥15N at an ambient temperature and time of 23℃ / 4h.

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