A vehicle wrap film liquid, its preparation method and usage method

Abstract

This application relates to the field of car paint film liquids, and specifically discloses a car paint film liquid, its preparation method and usage method. The car paint film liquid includes component A and component B. Component A includes triethanolamine, carbomer, resin, sodium silicate, glycerol, preservative, defoamer and thickener; Component B includes high molecular weight polyvinyl alcohol and alumina powder. The usage method of the car paint film liquid includes the following steps: Step 1, dilute the component A with deionized water, and the weight ratio of component A to deionized water is 1:(80 - 150); Step 2, when applying the car paint film, first spray component B on the surface of the car, then spray component A on the surface of the car, and finally apply the car paint film. This application has the advantages that the car paint film is convenient to shift during installation, quickly adheres to the surface of the car shell after application, and there are no bubbles or non-conforming phenomena on the adhesion surface after long-term use.

Description

Technical Field

[0001] This application relates to the technical field of car paint film liquids. More specifically, it relates to a car paint film liquid, its preparation method, and its usage method. Background Art

[0002] When applying a car paint film, the car paint film itself, the film application liquid, and installation tools are required. A car paint film with good installation quality can protect the car paint surface and prevent damage caused by external factors such as scratches and stone impacts that may occur during daily use. At the same time, it can also reduce oxidation and corrosion caused by natural factors such as ultraviolet rays and acid rain. Therefore, the installation quality of car paint films is extremely important, and the installation quality of car paint films is mainly improved from three aspects: the quality of the car paint film, the quality of the film application liquid, and the installers.

[0003] In the prior art, the Chinese invention patent with the publication number CN115368973A discloses a foam-type invisible car paint film installation liquid. The weight composition components of the raw materials include 80 - 100 parts of deionized water, 1 - 10 parts of surfactant, 6 - 10 parts of foaming agent, 5 - 10 parts of foam stabilizer, 1 - 3 parts of antioxidant, 1 - 2 parts of preservative, and 0.1 - 0.3 parts of chelating agent. Through the mixing of deionized water, surfactant, foaming agent, foam stabilizer, antioxidant, preservative, and chelating agent, it has good antioxidant properties and can facilitate the pasting of the car paint film.

[0004] The above-mentioned traditional car paint film installation liquid is used to replace body wash. During installation, in order to play a lubricating role, a foaming agent is still added, resulting in micro-foams between the car paint film and the surface of the car shell. There are disadvantages such as bubbling and non-conformity on the pasting surface after long-term use of the car paint film. Summary of the Invention

[0005] In order to solve the problem that when installing a car paint film, in order to improve the lubricity, the car paint film is not firmly pasted and does not conform, this application provides a car paint film liquid, its preparation method, and its usage method.

[0006] In the first aspect, this application provides a car paint film liquid, adopting the following technical solution:

[0007] A car paint film liquid includes component A and component B. Component A includes triethanolamine, carbomer, resin, sodium silicate, glycerol, preservative, defoaming agent, and thickening agent; component B includes high molecular weight polyvinyl alcohol and alumina powder.

[0008] By adopting the above technical solution, glycerol in component A plays a lubricating role. When applying the car wrap, it facilitates the spreading and leveling of the car wrap. The principle of glycerol having a lubricating effect is its water absorption and moisture retention properties. After the car wrap is applied, if glycerol continues to play a lubricating role, it may cause bubbles or displacement between the car wrap and the car surface. Therefore, since both high molecular weight polyvinyl alcohol and alumina powder in component B of the present application have water absorption properties, high molecular weight polyvinyl alcohol and alumina powder can compete for the water around glycerol and the water that overflows due to glycerol concentration, resulting in a reduction in the lubricating effect of glycerol, and it is difficult for the applied car wrap to generate bubbles or displacement again.

[0009] After high molecular weight polyvinyl alcohol absorbs water, it will slightly expand and fill the gaps left after glycerol concentration. And the good water retention property of high molecular weight polyvinyl alcohol enables it to still have good toughness and elasticity after a long time of car wrap installation, and it is difficult to cause damage to the car surface when tearing.

[0010] Component B contains high molecular weight polyvinyl alcohol and alumina powder, and the water-absorbing component is an organic-inorganic composite. The water absorption rate of the organic-inorganic composite is higher than that of a single component of the same weight, and it has good stability.

[0011] Sodium silicate in component A is used to adjust the temperature of the film application liquid. A car may experience sharp temperature changes at different times and locations, causing the composition of the car wrap film application liquid to change with the temperature of the car surface. The addition of sodium silicate increases the temperature adaptability of the car film application liquid, so that the elasticity and viscosity of the organic-inorganic composite in component B will not change greatly in a short time. Therefore, even after several years of use, the car wrap using the car wrap film application liquid of the present application is still difficult to have bubbles and displacement phenomena.

[0012] The car wrap film application liquid of the present application has the advantages that the car wrap is convenient to displace during installation, quickly adheres to the surface of the car shell after application, and there are no bubbles or non-conforming phenomena on the adhesive surface after long-term use.

[0013] Preferably, component A includes the following substances in parts by weight: 3 - 5 parts of triethanolamine, 0.5 - 1 part of carbomer, 30 - 50 parts of resin, 5 - 10 parts of sodium silicate, 3 - 7 parts of glycerol, 0.1 - 0.5 part of preservative, 0.5 - 1 part of defoamer, and 0.6 - 1.5 parts of thickener.

[0014] By adopting the above technical solutions, the resin, which is an important component of the above-mentioned film application liquid, serves as the main binder. Triethanolamine plays an emulsifying role, and through cooperation with carbomer, it thickens and moisturizes the resin. Sodium silicate is mainly used to regulate the temperature of component B and component A, avoiding the influence of rapid changes in external temperature on the components of the film application liquid. Glycerol mainly plays a lubricating role, facilitating the movement of the car wrap during application. Preservatives, defoamers, and thickeners are common additives with relatively small dosages.

[0015] Preferably, the mass ratio of high molecular weight polyvinyl alcohol to alumina powder in component B is 1:(0.1 - 0.3).

[0016] By adopting the above technical solutions, a suitable ratio of high molecular weight polyvinyl alcohol to alumina powder can maximize the water absorption of the organic-inorganic composite and maintain the long-term stability of component B to the greatest extent.

[0017] Preferably, the alumina powder is nano-β alumina powder; the high molecular weight polyvinyl alcohol solution is an aqueous solution of high molecular weight polyvinyl alcohol with a mass fraction of 0.45% - 0.55%.

[0018] By adopting the above technical solutions, the volume of nano-β alumina powder does not change after water absorption. Therefore, in component B, the only substance whose volume increases after water absorption is high molecular weight polyvinyl alcohol. Moreover, the high molecular weight polyvinyl alcohol solution is viscous and can flow by itself to fill the remaining voids after glycerol is concentrated, maintaining the flatness of the car wrap surface. The high molecular weight polyvinyl alcohol solution with a mass fraction of 0.45% - 0.55% is between Newtonian fluid and non-Newtonian fluid, resulting in less water carried by the high molecular weight polyvinyl alcohol solution itself, sufficient water absorption space, and being viscous itself, enabling it to firmly adhere to the car surface.

[0019] Preferably, the sodium silicate is Na2O·2SiO2.

[0020] By adopting the above technical solutions, Na2O·2SiO2 type sodium silicate has a good temperature regulation effect and does not react with high molecular weight polyvinyl alcohol and alumina powder.

[0021] Preferably, the resin is one of liquid epoxy resin, polyurethane resin, or acrylic resin.

[0022] By adopting the above technical solutions, all three resins, epoxy resin, polyurethane resin, and acrylic resin, can be used as the main components of the film application liquid. However, due to the different compositions of the three resins, there are differences in their adhesion and water retention properties, so they cannot be mixed. If mixed for a long time, it will cause bubbles or cracks on the surface of the car wrap and the car surface.

[0023] Second aspect, the present application provides a preparation method of a car wrap film liquid, adopting the following technical solution:

[0024] A preparation method of a car wrap film liquid, the preparation method of the A component includes the following steps: Mix triethanolamine, carbomer, resin, sodium silicate, glycerol, preservative, defoaming agent and thickening agent, and use a defoaming mixer to stir at a speed of 100 - 300 rpm for 0.5 - 1 h to obtain the A component; the preparation method of the B component includes the following steps: Add alumina powder to the high molecular weight polyvinyl alcohol solution, and use a defoaming mixer to stir at a speed of 500 - 800 rpm for 0.5 - 1 h to obtain the B component.

[0025] By adopting the above technical solution, the simple preparation method can quickly and conveniently prepare the A component and the B component. Using a defoaming mixer can avoid generating bubbles during the stirring process, and finally the obtained A component and B component are bubble-free, meeting the requirement of the car wrap film liquid being bubble-free.

[0026] Third aspect, the present application provides a using method of a car wrap film liquid, adopting the following technical solution:

[0027] A using method of a car wrap film liquid, including the following steps:

[0028] Step 1, dilute the A component with deionized water, and the weight ratio of the A component to deionized water is 1:(80 - 150);

[0029] Step 2, when applying the car wrap film, first spray the B component on the surface of the car, then spray the A component on the surface of the car, and finally apply the car wrap film.

[0030] By adopting the above technical solution, in Step 1, the A component is diluted and the volume is expanded by 80 - 150 times. The user only needs to purchase the car wrap film liquid of the present application once and can use it multiple times, which is economical and practical; in Step 2, first spray the B component on the surface of the car shell. The B component is viscous, which can not only firmly adhere to the surface of the car shell, but also has good viscoelasticity and is difficult to cause damage to the car surface when torn; then spray the A component, and after spraying the A component, apply the car wrap film. The lubricity of glycerol in the A component can enable the user to smoothly adjust the position of the car wrap film and scrape the car wrap film flat when applying the car wrap film; at the moment when the A component and the B component come into contact, the B component starts to absorb the water in the A component. Therefore, the lubricating effect of glycerol is continuously decreasing until the car wrap film firmly adheres to the surface of the car.

[0031] Preferably, the mass ratio of the B component to the A component sprayed on the surface of the car is 1:(5 - 10).

[0032] By adopting the above technical solution, a suitable mass ratio of component B to component A sprayed on the car surface can reserve sufficient time for the constructor to move the car wrap. After the car wrap is properly applied, it can firmly adhere to the car surface within an appropriate time range.

[0033] Preferably, after component B is sprayed on the car surface, component A is sprayed within 0 - 5 minutes; after component A is sprayed, the car wrap is applied within 0 - 10 minutes.

[0034] By adopting the above technical solution, within the time range of spraying component A, the time that component B is exposed to air will not cause physical or chemical property changes in component B; within the time range of applying the car wrap, the time that component B is exposed to air will not cause physical or chemical property changes in component B; within this time range, both component A and component B of the present application can perform their respective functions, and it is difficult for bubbles or displacement to occur after the car wrap is applied.

[0035] In summary, the present application has the following beneficial effects:

[0036] 1. In the present application, glycerol in component A plays a lubricating role, and both high molecular weight polyvinyl alcohol and alumina powder in component B have a water absorption effect. After the car wrap is applied, high molecular weight polyvinyl alcohol and alumina powder can compete for the water around glycerol and the water that overflows due to glycerol concentration, resulting in a reduction in the lubricating effect of glycerol. Then, it is difficult for bubbles or displacement to occur again in the applied car wrap; the car wrap film liquid of the present application is convenient for displacement during car wrap installation and quickly adheres to the surface of the car shell after installation.

[0037] 2. Sodium silicate in component A of the present application is used to adjust the temperature of the film liquid. The car shell may experience rapid temperature changes at different times and locations, causing the composition of the car wrap film liquid to change with the temperature change on the surface of the car shell. The addition of sodium silicate increases the temperature adaptability of the car film liquid, so that the elasticity and viscosity of the organic-inorganic composite of component B will not change significantly in a short time. Therefore, even after several years of use, it is still difficult for bubbles or displacement to occur in the car wrap using the car wrap film liquid of the present application.

[0038] 3. In the usage method of the present application, component B is sprayed first and then component A. At the moment when component A and component B come into contact, component B begins to absorb the water in component A. Therefore, the lubricating effect of glycerol is continuously reduced until the car wrap firmly adheres to the car surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is intended to show the adhesion conditions of the car wrap film liquid of the present application at different times during car wrap installation. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] The raw materials in the embodiments and comparative examples of this application are all commercially available;

[0041] High molecular weight polyvinyl alcohol, analytical pure, molecular weight: 200,000, brand: Fangxin Biology; car paint protection film, model: XH7240ZU0DXG; brand: UPPF; triethanolamine, model: AR500mL, brand, Xilong; carbomer, model: 971P, brand: Yamaide; Na2O·2SiO2, model: MDS-A, brand: Tongli; glycerol, analytical pure, brand: Sinopharm; preservative is BIT-10, purchased from Foshan Liyuan Chemical Industry; defoamer is polyvinyl alcohol defoamer, model: PR6339, purchased from Tianjin Ruike Chemical Trade Co., Ltd.; thickener is polyacrylamide, analytical pure, brand: Hengju; nano-β-aluminum oxide powder, analytical pure, brand, Hefei Kejing;

[0042] The following further elaborates on this application in combination with examples and comparative examples.

[0043] Example

[0044] Example 1

[0045] A preparation method of a car paint protection film liquid includes the following steps:

[0046] The preparation method of component A includes the following steps: Mix 3g of triethanolamine, 1g of carbomer, 30g of epoxy resin, 10g of Na2O·2SiO2, 3g of glycerol, 0.5g of preservative, 0.5g of defoamer and 1.5g of thickener, and use a defoaming stirrer to stir at a speed of 100 rpm at room temperature for 1h to obtain component A;

[0047] The preparation method of component B includes the following steps: Add 0.2g of nano-β-aluminum oxide powder to 1g of a high molecular weight polyvinyl alcohol solution with a mass fraction of 0.5%, and use a defoaming stirrer to stir at a speed of 500 rpm at room temperature for 1h to obtain component B.

[0048] A usage method of a car paint protection film liquid includes the following steps:

[0049] Step 1, dilute component A with deionized water, and the weight ratio of component A to deionized water is 1:80;

[0050] Step 2, when applying the car paint protection film, first spray 1g of component B on the surface of the car, and then spray 7g of component A on the surface of a 10cm*10cm car shell template 5 minutes later. After 10 minutes, apply the car paint protection film, leaving a tensile angle to obtain a car paint protection film liquid sample.

[0051] Example 2

[0052] A preparation method of a car paint protection film liquid includes the following steps:

[0053] The preparation method of component A includes the following steps: Mix 5 g of triethanolamine, 0.5 g of carbomer, 50 g of polyurethane resin, 5 g of Na2O·2SiO2, 7 g of glycerol, 0.1 g of preservative, 1 g of defoamer and 0.6 g of thickener, and stir at room temperature for 0.5 h at a speed of 300 rpm using a defoaming stirrer to obtain component A;

[0054] The preparation method of component B includes the following steps: Add 0.2 g of nano-β-aluminum oxide powder to 1 g of a high molecular weight polyvinyl alcohol solution with a mass fraction of 0.5%, and stir at room temperature for 0.5 h at a speed of 800 rpm using a defoaming stirrer to obtain component B.

[0055] A method for using a car paint film liquid includes the following steps:

[0056] Step 1, dilute component A with deionized water, and the weight ratio of component A to deionized water is 1:150;

[0057] Step 2, when applying the car paint film, first spray 1 g of component B on the surface of the car, and then spray 7 g of component A on the surface of a 10 cm * 10 cm car shell template after 1 min. After 1 min, apply the car paint film and leave a tension angle to obtain a car paint film liquid sample.

[0058] Example 3

[0059] A preparation method of a car paint film liquid includes the following steps:

[0060] The preparation method of component A includes the following steps: Mix 4 g of triethanolamine, 0.8 g of carbomer, 40 g of acrylic resin, 8 g of Na2O·2SiO2, 5 g of glycerol, 0.3 g of preservative, 0.7 g of defoamer and 1 g of thickener, and stir at room temperature for 0.7 h at a speed of 200 rpm using a defoaming stirrer to obtain component A;

[0061] The preparation method of component B includes the following steps: Add 0.2 g of nano-β-aluminum oxide powder to 1 g of a high molecular weight polyvinyl alcohol solution with a mass fraction of 0.5%, and stir at room temperature for 0.7 h at a speed of 650 rpm using a defoaming stirrer to obtain component B.

[0062] A method for using a car paint film liquid includes the following steps:

[0063] Step 1, dilute component A with deionized water, and the weight ratio of component A to deionized water is 1:110;

[0064] Step 2: When applying the car wrap, first spray 1 g of Component B on the car surface. After 3 minutes, spray 7 g of Component A on the surface of a 10 cm × 10 cm car shell template. After 6 minutes, apply the car wrap, leaving a tensile angle, to obtain a sample of the car wrap liquid film.

[0065] Example 4

[0066] The difference from Example 3 lies in the different amounts of raw materials in Component B. The specific preparation steps of Component B are as follows:

[0067] The preparation method of Component B includes the following steps: Add 0.5 g of nano-β-aluminum oxide powder to 1 g of a high molecular weight polyvinyl alcohol solution with a mass fraction of 0.5%, and stir at room temperature for 0.7 h at a speed of 650 rpm using an anti-foaming stirrer to obtain Component B.

[0068] Example 5

[0069] The difference from Example 3 lies in that the mass fraction of the high molecular weight polyvinyl alcohol solution is 0.3%.

[0070] Example 6

[0071] The difference from Example 3 lies in that the mass fraction of the high molecular weight polyvinyl alcohol solution is 0.6%.

[0072] Example 7

[0073] The difference from Example 3 lies in replacing Na2O·2SiO2 in Component A with an equal weight of water glass.

[0074] Example 8

[0075] The difference from Example 3 lies in the different amounts of raw materials in Step 2 of the usage method of the car wrap liquid film. Step 2 is as follows:

[0076] Step 2: When applying the car wrap, first spray 1 g of Component B on the car surface. After 3 minutes, spray 5 g of Component A on the surface of a 10 cm × 10 cm car shell template. After 6 minutes, apply the car wrap, leaving a pulling angle, to obtain a sample of the car wrap liquid film.

[0077] Example 9

[0078] The difference from Example 3 lies in the different amounts of raw materials in Step 2 of the usage method of the car wrap liquid film. Step 2 is as follows:

[0079] Step 2: When applying the car wrap, first spray 1 g of Component B on the car surface. After 3 minutes, spray 10 g of Component A on the surface of a 10 cm × 10 cm car shell template, and then apply the car wrap. After 6 minutes, apply the car wrap, leaving a pulling angle, to obtain a sample of the car wrap liquid film.

[0080] Example 10

[0081] It is different from Example 3 in that the dosage of raw materials in Step 2 of the usage method of the car wrap film liquid is different. The specific content of Step 2 is as follows:

[0082] Step 2: When applying the car wrap film, first spray 1 g of Component B on the surface of the car. After 3 minutes, spray 3 g of Component A on the surface of a 10 cm * 10 cm car shell template. After 6 minutes, apply the car wrap film, leaving a pulling corner, to obtain a sample of the car wrap film liquid.

[0083] Example 11

[0084] It is different from Example 3 in that the dosage of raw materials in Step 2 of the usage method of the car wrap film liquid is different. The specific content of Step 2 is as follows:

[0085] Step 2: When applying the car wrap film, first spray 1 g of Component B on the surface of the car. After 3 minutes, spray 12 g of Component A on the surface of a 10 cm * 10 cm car shell template. After 6 minutes, apply the car wrap film, leaving a pulling corner, to obtain a sample of the car wrap film liquid.

[0086] Example 12

[0087] It is different from Example 3 in that the film application time in Step 2 of the usage method of the car wrap film liquid is different. The specific content of Step 2 is as follows:

[0088] Step 2: When applying the car wrap film, first spray 1 g of Component B on the surface of the car. After 8 minutes, spray 7 g of Component A on the surface of a 10 cm * 10 cm car shell template. After 15 minutes, apply the car wrap film, leaving a pulling corner, to obtain a sample of the car wrap film liquid.

[0089] Comparative Example

[0090] Comparative Example 1

[0091] It is different from Example 3 in that carbomer is not added to Component A.

[0092] Comparative Example 2

[0093] It is different from Example 3 in that triethanolamine is not added to Component A.

[0094] Comparative Example 3

[0095] It is different from Example 3 in that Na2O·2SiO2 is not added to Component A.

[0096] Comparative Example 4

[0097] It is different from Example 3 in that glycerol is not added to Component A.

[0098] Comparative Example 5

[0099] It is different from Example 3 in that no high molecular weight polyvinyl alcohol solution is added to Component B, but the added mass of nano-β-aluminum oxide powder is 1.2 g.

[0100] Comparative Example 6

[0101] It is different from Example 3 in that no nano-β-aluminum oxide powder is added to Component B, but the added mass of high molecular weight polyvinyl alcohol solution is 1.2 g.

[0102] Comparative Example 7

[0103] It is different from Example 3 in that the usage method of the car wrap film liquid is different. The specific method is as follows:

[0104] A usage method of a car wrap film liquid includes the following steps:

[0105] Step 1, dilute Component A with deionized water, and the weight ratio of Component A to deionized water is 1:110;

[0106] Step 2, before applying the car wrap, mix 1 g of Component B with 7 g of Component A, then spray it on the surface of a 10 cm * 10 cm car shell template, and apply the car wrap after 6 min, leaving a pulling corner to obtain a car wrap film liquid sample.

[0107] Comparative Example 8

[0108] Use a commercially available film liquid, name, car wrap installation glue; series, M-X1QC35L; model, 8026; brand, Henkel.

[0109] Performance detection test

[0110] Adhesion time test: Use the car wrap film liquid samples of Example 3, Example 12, Comparative Example 4, Comparative Example 5, and Comparative Example 6 of this application. Use an XLW-L intelligent electronic tensile testing machine to pull the car wrap, and record the pulling force when the car wrap is torn off from the car shell template at 0.5 min, 1 min, 3 min, and 5 min after applying the car wrap; the test results are shown in the attached Figure 1 ;

[0111] Durability test

[0112] 80 °C ultraviolet irradiation blistering test: Use a Deliang DL-0209 ultraviolet aging box to irradiate the car wrap film liquid samples prepared in the examples and comparative examples of this application at 37 °C for 72 h, and observe the blistering phenomenon on the surface of the car wrap after the irradiation ends;

[0113] 80°C Holding Tack Tensile Strength Test: Bake the vehicle wrap film liquid samples prepared in the examples and comparative examples of this application in a vacuum oven at a temperature of 80°C for 7 days, then use an XLW-L intelligent electronic tensile testing machine to pull the vehicle wrap, and record the tensile strength when the vehicle wrap is peeled off from the automotive exterior template;

[0114] 37°C Electrolyte Immersion Test: Refer to the standard ASTM G71-1981(2009) "Practice and Evaluation of Corrosion Testing by Electrical Current in Electrolytes" to conduct a 72-hour electrolysis test; after the electrolysis ends, take out the vehicle wrap film liquid sample, soak it in deionized water for 1 hour, and then observe the phenomenon.

[0115] The test results are shown in Table 1 below;

[0116] Table 1 Persistence Detection Table of Vehicle Wrap Film Liquid Samples

[0117]

[0118]

[0119] Combined with the attached drawings of the specification Figure 1 It can be seen that the vehicle wrap film liquid sample prepared in Example 3 of this application has a small tensile strength and good lubricity within 1 minute after preparation; after 3 minutes, the tensile strength increases rapidly, indicating that the adhesion force increases rapidly after 3 minutes, and the vehicle wrap adheres firmly to the automotive exterior; in Example 12, both the spraying time and the film application time of Component A are extended, resulting in the tensile strength of the vehicle wrap film liquid sample prepared in Example 12 increasing to 1 N within 0.5 minutes after preparation, making it difficult to move and adjust the vehicle wrap again, and the subsequent adhesion force continues to increase; in Comparative Example 4, glycerol is not added, and the tensile strength has increased to 4 N after 0.5 minutes of applying the vehicle wrap, making it difficult to move the vehicle wrap after it is applied; in Comparative Example 5, high molecular weight polyvinyl alcohol is replaced with alumina powder, and in Comparative Example 6, alumina powder is replaced with high molecular weight polyvinyl alcohol. The vehicle wrap film liquid samples prepared in Comparative Examples 5 and 6 have relatively small tensile strengths within 1 minute after preparation, and the vehicle wrap can be moved, but the tensile strength of the vehicle wrap is still relatively small within the subsequent 5 minutes, and the vehicle wrap is not firmly adhered to the automotive exterior, posing a risk of displacement; therefore, the vehicle wrap film liquid sample prepared in Example 3 of this application is the most convenient to use and adheres the most firmly when installing the vehicle wrap.

[0120] Combined with the data of Examples 1, 2, and 3, it can be seen that the differences between Examples 1, 2, and 3 are only in the raw material composition ratios. The vehicle wrap film liquid of Example 3 does not turn yellow after being immersed in the 37°C electrolyte for 72 hours, while the vehicle wrap film liquids of Examples 1 and 2 turn slightly yellow after being immersed in the 37°C electrolyte for 72 hours. Therefore, the raw material ratio of Example 3 becomes the optimal ratio for preparing the vehicle wrap film liquid.

[0121] Combining the data of Examples 3 and 4, it can be seen that the difference between Example 4 and Example 3 is that the ratio of high molecular weight polyvinyl alcohol to alumina powder in Example 4 is different. Under the conditions of ultraviolet irradiation at 80 °C for 72 h and electrolyte immersion at 37 °C for 72 h, the car paint film liquid samples prepared in Example 4 and Example 3 do not bubble or turn yellow. However, the holding adhesive force of the car paint film liquid sample prepared in Example 4 after baking at 80 °C for 7 days is much greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80 °C for 7 days, and there is slight residual glue, which proves that the car paint film liquid sample prepared in Example 4 is greatly affected by high temperature, and the optimal range of the ratio of high molecular weight polyvinyl alcohol to alumina powder is 1:(0.1 - 0.3).

[0122] Combining the data of Examples 3, 5, and 6, it can be seen that the differences between Examples 5 and 6 and Example 3 are that the mass fractions of the aqueous solutions of high molecular weight polyvinyl alcohol in Examples 5 and 6 are different. The results show that the car paint film liquid samples prepared in Examples 5 and 6 turn slightly yellow after being immersed in the electrolyte at 37 °C for 72 h. Therefore, the optimal mass fraction of the aqueous solution of polyvinyl alcohol in this application is 0.45% - 0.55%.

[0123] Combining the data of Examples 3 and 7, it can be seen that the difference between Example 7 and Example 3 is that water glass is used to prepare Component A in Example 7, while it is pure Na2O·2SiO2 in Example 3. The results show that the car paint film liquid sample prepared in Example 7 has slight bubbling under ultraviolet irradiation at 80 °C for 72 h, and turns slightly yellow and has residual glue after being immersed in the electrolyte at 37 °C for 72 h, which proves that directly replacing Na2O·2SiO2 with water glass will have a great impact on the car paint film liquid of this application, and the car paint film liquid of this application can only use Na2O·2SiO2.

[0124] Combining the data of Examples 3, 8, 9, 10, and 11, it can be seen that the differences between Examples 8, 9, 10, and 11 and Example 3 are that when using the car paint film liquid, the ratios of Component A to Component B are different. The car paint film liquid samples prepared in Examples 8 and 9 have the same other parameters as those in Example 3 except that the holding adhesive force of the car paint film liquid samples after baking at 80 °C for 7 days is greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80 °C for 7 days; the car paint film liquid samples prepared in Examples 10 and 11 not only have a greater holding adhesive force of the car paint film liquid samples after baking at 80 °C for 7 days than that of the car paint film liquid sample prepared in Example 3 after baking at 80 °C for 7 days, but also turn slightly yellow after being immersed in the electrolyte at 37 °C for 72 h; therefore, the optimal mass ratio of Component B to Component A when used in this application is 1:(5 - 10).

[0125] Combining the data of Example 3 and Example 12, it can be seen that the difference between Example 12 and Example 3 lies in that when the car paint film liquid of Example 12 is used, the spraying time of Component A and the time of pasting the car paint film are different. The sample of the car paint film liquid prepared in Example 12 turns slightly yellow after being soaked in the 37°C electrolyte for 72 hours, which proves that when the car paint film liquid of the present application is used, the best effect of pasting the car paint film is achieved by following the time range of the present application: "After spraying Component B on the car surface, spray Component A within 0 - 5 minutes; after spraying Component A, paste the car paint film within 0 - 10 minutes."

[0126] Combining the data of Example 3, Comparative Example 1 and Comparative Example 2, it can be seen that the differences between Comparative Example 1 and 2 and Example 3 are that Carbomer and Triethanolamine are not added in Comparative Example 1 and 2 respectively. The results show that the holding adhesive force of the car paint film liquid samples prepared in Comparative Example 1 and 2 after baking at 80°C for 7 days is greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80°C for 7 days, and they turn slightly yellow after being soaked in the 37°C electrolyte for 72 hours. This proves that Carbomer and Triethanolamine are both essential in the preparation of Component A.

[0127] Combining the data of Example 3 and Comparative Example 3, it can be seen that the difference between Comparative Example 3 and Example 3 is that Na2O·2SiO2 is not added in Comparative Example 3. The results show that the car paint film liquid sample prepared in Comparative Example 3 has slight foaming after being irradiated with ultraviolet light at 80°C for 72 hours, turns slightly yellow and has residual glue after being soaked in the 37°C electrolyte for 72 hours, and the holding adhesive force of the car paint film liquid sample prepared in Comparative Example 3 after baking at 80°C for 7 days is greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80°C for 7 days. This proves that Na2O·2SiO2 must be added in the preparation of Component A.

[0128] Combining the data of Example 3 and Comparative Example 4, it can be seen that the difference between Comparative Example 4 and Example 3 is that Glycerol is not added in Comparative Example 4. The results show that the car paint film liquid sample prepared in Comparative Example 4 has slight foaming after being irradiated with ultraviolet light at 80°C for 72 hours, turns slightly yellow and has residual glue after being soaked in the 37°C electrolyte for 72 hours, and the holding adhesive force of the car paint film liquid sample prepared in Comparative Example 4 after baking at 80°C for 7 days is greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80°C for 7 days. This proves that Glycerol must be added as a lubricant.

[0129] Combining the data of Example 3, Comparative Examples 5 and 6, it can be seen that the differences between Comparative Examples 5 and 6 and Example 3 are that in Comparative Example 5, high molecular weight polyvinyl alcohol is replaced by alumina powder, and in Comparative Example 6, alumina powder is replaced by high molecular weight polyvinyl alcohol. The car paint film liquid samples prepared in Comparative Examples 5 and 6 slightly foamed after being irradiated with ultraviolet light at 80°C for 72 h, and slightly turned yellow and had residual glue after being soaked in the electrolyte at 37°C for 72 h. The holding tack force of the car paint film liquid samples prepared in Comparative Examples 5 and 6 after baking at 80°C for 7 days was greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80°C for 7 days. This proves that high molecular weight polyvinyl alcohol and alumina powder cannot replace each other, and only by using them together can a synergistic effect be achieved.

[0130] Combining the data of Example 3 and Comparative Example 7, it can be seen that the difference between Comparative Example 7 and Example 3 is that when using the car paint film liquid in Comparative Example 7, components A and B were mixed and sprayed simultaneously. The results showed that the car paint film liquid sample prepared in Comparative Example 7 slightly foamed after being irradiated with ultraviolet light at 80°C for 72 h, turned yellow and had residual glue after being soaked in the electrolyte at 37°C for 72 h, and the holding tack force of the car paint film liquid sample prepared in Comparative Example 7 after baking at 80°C for 7 days was greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80°C for 7 days. This proves that the usage steps of components A and B are very important for the final effect of the car paint film liquid of the present application.

[0131] Combining the data of Example 3 and Comparative Example 8, it can be seen that the difference between Comparative Example 8 and Example 3 is that Comparative Example 8 is a commercially available car paint film liquid. The holding tack force of the car paint film liquid sample prepared in Comparative Example 8 after baking at 80°C for 7 days was slightly greater than that of the car paint film liquid sample prepared in Example 3 after baking at 80°C for 7 days, and it slightly turned yellow after being soaked in the electrolyte at 37°C for 72 h. This proves that the performance of the commercially available car paint film liquid sample is not as good as that of the car paint film liquid sample prepared under the optimal conditions of the present application.

[0132] This specific embodiment is only an explanation of the present application and does not limit the present application. Those skilled in the art can make modifications to this embodiment without creative contributions according to their needs after reading this specification, but as long as they are within the scope of the claims of the present application, they are protected by the patent law.

Claims

1. A method for using a car cover film liquid, characterized in that: The method for using the car cover film liquid comprises the following steps: Step 1, diluting the component A with deionized water, wherein the weight ratio of the component A to the deionized water is 1: (80-150); Step 2, when applying the car cover, first spray component B on the car surface, then spray component A on the car surface, and finally apply the car cover; The component A comprises triethanolamine, carbomer, resin, sodium silicate, glycerol, preservative, defoamer and thickener; the component B comprises high molecular weight polyvinyl alcohol and alumina powder; The mass ratio of high molecular weight polyvinyl alcohol to aluminum oxide in the B component is 1: (0.1-0.3); The alumina powder is nano-β-alumina powder; the high molecular weight polyvinyl alcohol is a high molecular weight polyvinyl alcohol aqueous solution with a mass fraction of 0.45%-0.55%; The sodium silicate is Na2O∙2SiO2, model: MDS-A, brand: Tongli; The component A comprises the following substances in parts by weight: 3-5 parts of triethanolamine, 0.5-1 parts of carbomer, 30-50 parts of resin, 5-10 parts of sodium silicate, 3-7 parts of glycerol, 0.1-0.5 parts of preservative, 0.5-1 parts of defoaming agent and 0.6-1.5 parts of thickener.

2. The method for using the car cover film liquid according to claim 1, characterized in that: The resin is one of liquid epoxy resin, polyurethane resin or acrylic resin.

3. The method for using the car cover film liquid according to claim 1, characterized in that: The mass ratio of the B component to the A component sprayed on the surface of the car is 1: (5-10).

4. The method for using the car cover film liquid according to claim 1, characterized in that: After the B component is sprayed on the surface of the car, the A component is sprayed within 0-5 minutes; after the A component is sprayed, the car cover is applied within 0-10 minutes.

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