Automobile externally-pasted window film

Abstract

The utility model provides an externally-pasted window film for an automobile. The externally-pasted window film for the automobile comprises a protective film layer, a UV coating, a base material layer, a first mounting adhesive layer, a magnetic control film layer, a second mounting adhesive layer and a release film layer which are sequentially stacked, the UV coating is arranged at the top of the base material layer, the protective film layer is arranged at the top of the UV coating, the first mounting adhesive layer is arranged at the bottom of the base material layer, the magnetic control film layer is arranged at the bottom of the first mounting adhesive layer, and the magnetic control film layer is made of a PET magnetic control film; a second mounting adhesive layer is arranged at the bottom of the magnetic control film layer, and a release film layer is arranged at the bottom of the second mounting adhesive layer; the automobile externally-pasted window film can be pasted on the surface of the outer side of automobile glass, sunlight is prevented from entering the automobile glass through the UV coating, the automobile glass is prevented from being directly irradiated, and the better heat insulation effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat insulation film, and specifically relates to a car outer pasting window film for the surface of car body. BACKGROUND

[0002] With the improvement of people's quality of life, people begin to pay attention to the protection of vehicles to the person, and pay more and more attention to the heat insulation film on the car glass. The heat insulation film on the market is pasted on the inner side of the car glass for heat insulation. Its principle is that sunlight passes through the transparent car glass and irradiates on the heat insulation film. At this time, the heat insulation film blocks the ultraviolet rays in the sunlight to achieve the effect of heat insulation. However, the heat of sunlight will be absorbed by the car glass, causing the car glass to heat up, affecting the temperature inside the car, and ultimately affecting the heat insulation effect. Therefore, we propose a car outer pasting window film to solve the above problems. SUMMARY

[0003] In view of the above shortcomings of the prior art, the utility model provides a car outer pasting window film. The car outer pasting window film can be pasted on the outer surface of the car glass. The UV coating is used to block sunlight from entering the car glass, avoiding direct irradiation of the car glass, and achieving better heat insulation effect.

[0004] The utility model provides a car outer pasting window film, which comprises a protective film layer, a UV coating, a substrate layer, a first mounting adhesive layer, a magnetic control film layer, a second mounting adhesive layer and a release film layer which are stacked in sequence. That is, the substrate layer is provided with a UV coating on the top, and the UV coating is provided with a protective film layer on the top. The substrate layer is provided with a first mounting adhesive layer on the bottom. The first mounting adhesive layer is provided with a magnetic control film layer on the bottom. The magnetic control film layer is provided with a second mounting adhesive layer on the bottom. The second mounting adhesive layer is provided with a release film layer on the bottom. The function of the first mounting adhesive layer is to adhere the substrate layer and the magnetic control film layer together. The function of the second mounting adhesive layer is to adhere the magnetic control film layer and the release film layer together.

[0005] The protective film layer has a thickness of 2-188 microns, preferably 20-125 microns, and further preferably 16-75 microns. The material of the protective film layer is one of PET, PE and OPP (transparent or semi-transparent or colored polyester film), which plays a protective role on the coating below. Preferably, the material of the protective film layer is PET.

[0006] The UV coating has a thickness of 2-30 microns, preferably a thickness of 2-20 microns, and further preferably a thickness of 5-10 microns; the material of the UV coating is a highly cross-linked polymer coating, a heat-cured acrylate coating, a heat-cured sol-gel coating, a hybrid organic-inorganic sol-gel material, or a heat-cured silicone hard coating mixed with a UV agent, and the UV agent in the UV coating has a good UV blocking rate of 99%, so that the coating has a heat insulation effect. The proportion of the UV agent in the total weight of the coating material is 25%.

[0007] The substrate layer has a thickness of 10-150 microns, preferably a thickness of 15-100 microns, and further preferably a thickness of 20-50 microns, and the material of the substrate layer is TPU (thermoplastic polyurethane elastomer), TPH (thermoplastic plastic elastomer), PET, or PP; the TPU material is a thermoplastic polyurethane elastomer, which is a high molecular material obtained by copolymerization of diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) and a macromolecular polyol, a low molecular polyol (chain extender); the TPU material has a wide hardness range, is wear-resistant, oil-resistant, transparent, and has good elasticity, and is widely used in daily necessities, sports supplies, toys, and decorative materials. The TPH material is a thermoplastic plastic elastomer, which is a high-strength, high-water-resistance, and high-wear-resistance elastic material; it can withstand extreme temperature, pressure, and chemical corrosion while maintaining good physical properties. The PET film is also known as high-temperature-resistant polyester film, which has excellent physical properties, chemical properties, dimensional stability, transparency, and recyclability; it has excellent mechanical properties, and its toughness is the best among all thermoplastic plastics, and its tensile strength and impact strength are much higher than those of general films, and it has good stiffness, dimensional stability, excellent heat resistance, cold resistance, and good chemical resistance and oil resistance. The PP film is divided into unstretched polypropylene film and biaxially oriented polypropylene film, and the unstretched polypropylene film includes blown polypropylene film (IPP) produced by extrusion blowing and extrusion casting polypropylene (CPP) produced by T-mold method; the biaxially oriented polypropylene film (BOPP) is a new type of film developed to replace glass paper, which has high mechanical strength, good toughness, good transparency, and good gloss. Preferably, the material of the substrate layer is TPU or TPH, and more preferably, the material of the substrate layer is TPU.

[0008] The first and second installation adhesive layers (also referred to as pressure-sensitive adhesive layers) have a thickness of 2-35 μm, preferably a thickness of 5-20 μm, and further preferably a thickness of 7-15 μm. The materials of the first and second installation adhesive layers are both acrylate pressure-sensitive adhesive layers. Pressure-sensitive adhesives can be divided into rubber type and resin type according to the main resin component. The rubber type can be further divided into natural rubber and synthetic rubber type; the resin type mainly includes acrylate type, silicone type and polyurethane type. The rubber type pressure-sensitive adhesive is made by adding other auxiliary components such as tackifying resin, plasticizer, filler, viscosity regulator, vulcanizing agent, antioxidant, solvent, etc. in addition to the main component of rubber. The resin type pressure-sensitive adhesive needs to add defoaming agent, leveling agent, wetting agent, etc. in addition to the main resin.

[0009] The magnetic control film layer has a thickness of 5-188 μm, preferably a thickness of 12-125 μm, and further preferably a thickness of 20-75 μm; and the material of the magnetic control film layer is PET magnetic control film.

[0010] The release film layer has a thickness of 12-188 μm, preferably a thickness of 12-125 μm, and further preferably a thickness of 23-75 μm; and the material of the release film layer is one of PET, PE and OPP (transparent or semi-transparent or colored polyester film). The release film is coated with a silicone release agent on the surface of the environmentally friendly material PET, PE and OPP film, so that it can exhibit extremely light and stable release force to various different organic pressure-sensitive adhesives. Different organic pressure-sensitive adhesives, such as hot melt adhesive, acrylic adhesive and rubber system pressure-sensitive adhesive, require different release forces of the release film. According to the different adhesion of the release product, the release force is adjusted correspondingly to achieve extremely light and stable release force during peeling. The material of the release film layer is preferably PET.

[0011] The specific preparation steps of the above-mentioned automotive external window film are as follows:

[0012] (1) First, a magnetic control film layer is prepared by using a magnetic control sputtering production method to sputter a noble metal on the surface of a PET film; the noble metal is one of nickel, chromium, aluminum, gold, silver, copper and titanium;

[0013] (2) The second installation adhesive layer (5) is coated on one side of the magnetic control film layer by using a winding type coating and laminating line. During the process, the magnetic control film layer is stretched without deformation under a tension of 250-300 N, and then the pressure-sensitive adhesive layer is coated on the surface of the magnetic control film layer by using a roll coating method. The coated film is dried in an oven, the length of each of the seven ovens is 4 meters, the total length of the ovens is 28 meters, the temperature of each oven is set as follows: the first oven is 70℃, the second oven is 80℃, the third oven is 90℃, the fourth oven is 105℃, the fifth oven is 115℃, the sixth oven is 125℃ and the seventh oven is 90℃, and the drying time is 13 meters / minute;

[0014] (3) After the oven, the mirror surface is rolled and pasted to cover the release film layer, and the material of the release film layer is PET release film;

[0015] (4) The pressure-sensitive adhesive layer (first installation adhesive layer) is coated on the other side of the magnetron film layer by a coiled coating line, and the magnetron film layer is stretched without deformation under the condition of 250-300N tension, and then the pressure-sensitive adhesive layer is coated on the surface of the magnetron film layer, and the coating is dried by an oven, the length of the seven ovens is 4 meters, the total length of the ovens is 28 meters, the temperature is set as 70 DEG C for the first section, 80 DEG C for the second section, 90 DEG C for the third section, 105 DEG C for the fourth section, 115 DEG C for the fifth section, 125 DEG C for the sixth section, and 90 DEG C for the seventh section, and the baking time is 13 meters / minute;

[0016] (5) The transparent TPU film is made by a flow casting method as a base material layer;

[0017] (6) The base material layer is covered with the first installation adhesive layer by a mirror surface rolling and pasting method;

[0018] (7) The UV coating layer is coated on the other side of the base material layer by a screw rod, and the coating is coated by a roller coating method and dried by an oven, the length of the seven ovens is 4 meters, the total length of the ovens is 28 meters, the temperature is set as 60 DEG C for the first section, 70 DEG C for the second section, 80 DEG C for the third section, 90 DEG C for the fourth section, 110 DEG C for the fifth section, 120 DEG C for the sixth section, and 90 DEG C for the seventh section, the baking time is 7 meters / minute, and the UV coating layer is formed after the oven;

[0019] (8) Finally, the PET protective film is covered on the surface of the UV coating layer by a mirror surface rolling and pasting method to form a protective film layer (the protective film layer is peeled off when used).

[0020] The automobile outer pasting window film can be pasted on the outer side surface of the automobile glass, the UV coating layer is used to block sunlight from entering the automobile glass, direct irradiation of the automobile glass is avoided, and better heat insulation effect is realized. The automobile outer pasting window film has high reflectivity to infrared rays due to the magnetron film layer. The infrared blocking rate of the automobile outer pasting window film is 80%, and the infrared rays in the solar heat radiation can be effectively blocked from entering the vehicle; the UV (ultraviolet) blocking rate is greater than or equal to 99%. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a sectional structure schematic view of the automobile outer pasting window film in the embodiment of the utility model.

[0022] Main element symbol explanation:

[0023] DETAILED DESCRIPTION

[0024] In order to make the technical features, objects and effects of the utility model clearer, the specific implementation manner of the utility model will be explained below with reference to the drawings.

[0025] The preparation steps of the automobile externally pasted window film of the utility model will be explained in detail below:

[0026] (1) Firstly, a magnetron film layer 5 is made on the surface of the PET film by using the production mode of magnetron sputtering, wherein the noble metal is one of nickel, chromium, aluminum, gold, silver, copper and titanium;

[0027] (2) The pressure sensitive adhesive layer (the second mounting adhesive layer 6) is coated and mounted on one side of the magnetron film layer 5 by using the winding type coating and laminating line, and the magnetron film layer 5 is stretched without deformation under the condition of 250-300N tension, then the pressure sensitive adhesive layer is coated on the surface of the magnetron film layer 5, the coating is carried out by using the roll coating mode, and the coating is dried by using the oven, the length of each of the seven ovens is 4 meters, the total length of the ovens is 28 meters, the temperature is set as follows: the first oven is 70℃, the second oven is 80℃, the third oven is 90℃, the fourth oven is 105℃, the fifth oven is 115℃, the sixth oven is 125℃, and the seventh oven is 90℃, and the baking time is 13 meters / minute;

[0028] (3) After the drying of the oven, the release film layer 7 is laminated by using the mirror surface roll lamination mode, and the material of the release film layer 7 is PET release film;

[0029] (4) The pressure sensitive adhesive layer (the first mounting adhesive layer 4) is coated and mounted on the other side of the magnetron film layer 5 by using the winding type coating and laminating line, and the magnetron film layer 5 is stretched without deformation under the condition of 250-300N tension, then the pressure sensitive adhesive layer is coated on the surface of the magnetron film layer 5, the coating is carried out by using the roll coating mode, and the coating is dried by using the oven, the length of each of the seven ovens is 4 meters, the total length of the ovens is 28 meters, the temperature is set as follows: the first oven is 70℃, the second oven is 80℃, the third oven is 90℃, the fourth oven is 105℃, the fifth oven is 115℃, the sixth oven is 125℃, and the seventh oven is 90℃, and the baking time is 13 meters / minute;

[0030] (5) The transparent TPU film is made as the base material layer 3 by using the flow casting production mode;

[0031] (6) Then, the base material layer 3 is laminated with the first mounting adhesive layer 4 by using the mirror surface roll lamination mode;

[0032] (7) The UV coating layer 2 is coated on the other side of the base material layer by using the screw rod mode, the coating is carried out by using the roll coating mode, and the coating is dried by using the oven, the length of each of the seven ovens is 4 meters, the total length of the ovens is 28 meters, the temperature is set as follows: the first oven is 60℃, the second oven is 70℃, the third oven is 80℃, the fourth oven is 90℃, the fifth oven is 110℃, the sixth oven is 120℃, and the seventh oven is 90℃, the baking time is 7 meters / minute, and the UV coating layer 2 is formed after the drying of the oven.

[0033] (8) Finally, the protective film layer 1 is overlaid on the surface of the UV coating layer 2 by a mirror surface rolling and pasting manner, and the material of the protective film layer 1 is a PET protective film (the protective film layer 1 is peeled off when used).

[0034] According to the preparation steps of the automobile external window film, the film layer coating speed, the parameters of the spraying or scraping coating machine are adjusted, and the finished product with different film layer thicknesses is prepared, including the following examples.

[0035] Example 1

[0036] The automobile external window film in this embodiment includes the following layers which are sequentially stacked:

[0037] (1) The protective film layer is made of a PET protective film, and the thickness is 2 μm;

[0038] (2) The UV coating layer is made of a thermosetting acrylate coating layer mixed with a UV agent, and the thickness is 2 μm;

[0039] (3) The base material layer is made of TPU, and the thickness is 10 μm;

[0040] (4) The first mounting adhesive layer is made of an acrylate pressure-sensitive adhesive, and the thickness is 5 μm;

[0041] (5) The magnetic control film layer is made of a PET magnetic control film, and the thickness is 5 μm;

[0042] (6) The second mounting adhesive layer is made of an acrylate pressure-sensitive adhesive, and the thickness is 12 μm;

[0043] (7) The release film layer is made of PET, and the thickness is 12 μm.

[0044] Example 2

[0045] The automobile external window film in this embodiment includes the following layers which are sequentially stacked:

[0046] (1) The protective film layer is made of a PET protective film, and the thickness is 5 μm;

[0047] (2) The UV coating layer is made of a thermosetting acrylate coating layer mixed with a UV agent, and the thickness is 8 μm;

[0048] (3) The base material layer is made of TPU, and the thickness is 10 μm;

[0049] (4) The first mounting adhesive layer is made of an acrylate pressure-sensitive adhesive, and the thickness is 15 μm;

[0050] (5) The magnetic control film layer is made of a PET magnetic control film, and the thickness is 15 μm;

[0051] (6) the second mounting adhesive layer, which is made of acrylate pressure-sensitive adhesive and has a thickness of 20 μm;

[0052] (7) the release film layer, which is made of PET and has a thickness of 20 μm.

[0053] Example 3

[0054] The automobile window film in this example comprises the following layers which are stacked in turn:

[0055] (1) the protective film layer, which is made of PET protective film and has a thickness of 10 μm;

[0056] (2) the UV coating layer, which is made of heat-cured acrylate coating mixed with UV agent and has a thickness of 15 μm;

[0057] (3) the substrate layer, which is made of TPU and has a thickness of 20 μm;

[0058] (4) the first mounting adhesive layer, which is made of acrylate pressure-sensitive adhesive and has a thickness of 20 μm;

[0059] (5) the magnetic control film layer, which is made of PET magnetic control film and has a thickness of 25 μm;

[0060] (6) the second mounting adhesive layer, which is made of acrylate pressure-sensitive adhesive and has a thickness of 30 μm;

[0061] (7) the release film layer, which is made of PET and has a thickness of 35 μm.

[0062] Example 4

[0063] The automobile window film in this example comprises the following layers which are stacked in turn:

[0064] (1) the protective film layer, which is made of PET protective film and has a thickness of 15 μm;

[0065] (2) the UV coating layer, which is made of heat-cured acrylate coating mixed with UV agent and has a thickness of 23 μm;

[0066] (3) the substrate layer, which is made of TPU and has a thickness of 25 μm;

[0067] (4) the first mounting adhesive layer, which is made of acrylate pressure-sensitive adhesive and has a thickness of 32 μm;

[0068] (5) the magnetic control film layer, which is made of PET magnetic control film and has a thickness of 30 μm;

[0069] (6) the second mounting adhesive layer, which is made of acrylate pressure-sensitive adhesive and has a thickness of 32 μm;

[0070] (7) a release film layer, which is made of PET and has a thickness of 50 μm.

[0071] Example 5

[0072] The automobile window film in this example comprises the following layers which are stacked in sequence:

[0073] (1) a protective film layer, which is made of PET protective film and has a thickness of 20 μm;

[0074] (2) a UV coating layer, which is made of a thermally cured acrylate coating mixed with a UV agent and has a thickness of 30 μm;

[0075] (3) a base material layer, which is made of TPU and has a thickness of 30 μm;

[0076] (4) a first mounting adhesive layer, which is made of acrylate pressure-sensitive adhesive and has a thickness of 35 μm;

[0077] (5) a magnetic control film layer, which is made of PET magnetic control film and has a thickness of 35 μm;

[0078] (6) a second mounting adhesive layer, which is made of acrylate pressure-sensitive adhesive and has a thickness of 35 μm;

[0079] (7) a release film layer, which is made of PET and has a thickness of 70 μm.

[0080] The above merely illustrates the specific implementation of the present application, and is not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by any person skilled in the art without departing from the concept and principles of the present application shall fall within the scope of the present application.

Claims

1. A type of automotive exterior window film, characterized in that, Including the following layers stacked in sequence: (1) A protective film layer with a thickness of 2 to 188 μm; (2) UV coating, with a thickness of 2-30 μm; (3) Substrate layer, the thickness of which is 10 to 150 μm; (4) The first mounting adhesive layer has a thickness of 2 to 35 μm; (5) Magnetron film layer, the thickness of which is 5 to 188 μm; (6) The second mounting adhesive layer has a thickness of 2 to 35 μm; (7) Release film layer, the thickness of which is 12 to 188 μm.

2. The automotive exterior window film according to claim 1, characterized in that, The material of the protective film layer is PET, PE or OPP.

3. The automotive exterior window film according to claim 1, characterized in that, The thickness of the UV coating is 5–10 μm.

4. The automotive exterior window film according to claim 1, characterized in that, The substrate layer is made of TPU, TPH, PET, or PP.

5. The automotive exterior window film according to claim 4, characterized in that, The thickness of the substrate layer is 20–50 μm.

6. The automotive exterior window film according to claim 1, characterized in that, The function of the first mounting adhesive layer is to bond the substrate layer and the magnetron sputtering film layer together. The material of the first mounting adhesive layer is an acrylic pressure-sensitive adhesive layer.

7. The automotive exterior window film according to claim 1, characterized in that, The material of the magnetron film layer is PET magnetron film.

8. The automotive exterior window film according to claim 1, characterized in that, The second mounting adhesive layer has a release film layer at its bottom. The function of the second mounting adhesive layer is to bond the magnetron sputtering film layer and the release film layer together. The material of the second mounting adhesive layer is an acrylic pressure-sensitive adhesive layer.

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