Manufacturing method of invisible car cover

Abstract

The invention discloses a manufacturing method of an invisible car cover, and relates to the technical field of invisible car covers, and the manufacturing method comprises the following steps: S1, preparing materials; s2, carrying out preparation; s3, preparing an adhesive; and S4, performance testing: fixing the prepared protective film on a test plate, dividing the test plate into different test areas, and testing friction, puncture, breaking strength, corrosion resistance, flame retardance and rebound effect in the different areas. According to the invention, different test areas are divided, and friction, puncture, breaking strength, corrosion resistance, flame retardance and rebound effect are tested in the different areas; according to the invention, consumers can actually feel the self-repairing performance when heated, the anti-scraping effect, the puncture strength and strength resistance, the maximum breaking strength performance, the maximum pull rope length performance, the corrosion resistance, the combustion resistance and the rebound resilience of the test film, so that the perception of the consumers is improved, and the popularization and sales of the car cover are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of invisible car cover, and in particular to a method for manufacturing an invisible car cover. Background Art

[0002] With the development of economy, China has become the world's largest automobile consumer. More and more cars are entering thousands of households. The automobile maintenance market has risen simultaneously with the automobile consumption market. Paint protection film, also known as "car cover film" or "invisible car cover", is a general term for a transparent protective film that is pasted on the outside of the car paint to protect the car paint and enhance the appearance. PPF paint protection film can protect the car's paint surface, prevent scratches in minor accidents and the impact of stones flying during driving on the paint surface, and prevent foreign objects from sticking to the car paint, such as acid rain, bird droppings, etc. At the same time, the paint protection film can improve the appearance of the car, improve the brightness and gloss of the car paint. At present, most of the car paint protection films used are mainly modified PVC, but the plasticizer content in the PVC film is high, and plasticizer precipitation and other conditions are prone to occur. Therefore, the present invention provides a method for making an invisible car cover. The following problems exist in the prior art: 1. In the existing invisible car cover manufacturing method, most of the glue used is acrylic glue, which has low initial adhesion and is prone to residual glue on the car paint surface when peeling; 2. The existing method for making invisible car covers is that the invisible car cover is easily scratched, easily turns yellow, has poor weather resistance, and has residual glue during use, which results in a short service life of the invisible car cover film. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is: A method for making an invisible car cover comprises the following steps: S1. Prepare materials: The raw materials of the composite layer include fluorine-containing acrylic resin, curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate; the raw materials of the adhesive layer include polyacrylate, acrylic curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate; S2. Preparation: Select TPU surface material as manufacturing raw material, preheat the selected TPU in an oven, and dry the water inside the TPU material; S3, adhesive preparation: add the adhesive raw materials into the reaction kettle and mix them evenly, heat them to 70-85°C under nitrogen protection, stir the initiator and organic solvent evenly, add them into the reaction kettle, continue to heat until there is a vigorous reaction in the kettle, and control the reaction temperature at 80-85°C; S4. Performance test: Fix the prepared protective film on the test board, divide it into different test areas, and test the friction, puncture, breaking strength, corrosion resistance, flame retardancy, and rebound effects in different areas.

[0004] A further improvement of the technical solution of the present invention is that: S2 takes a TPU substrate, evenly applies self-repairing glue on the upper surface of the TPU substrate, and then puts it into an oven for baking at a temperature of 55 to 125°C to form a repair layer on the upper surface of the TPU substrate layer, and then adheres a PET protective film to the surface of the repair layer to obtain a semi-finished product.

[0005] A further improvement of the technical solution of the present invention is that: the obtained semi-finished product is subjected to a laminating treatment, and the laminating formula during the laminating treatment selects PP particles to perform laminating treatment on the surface material through a laminating machine. After the laminating treatment is completed, a polymer transferable glue and a light PET are coated on one side of the TPU surface material, and then the TPU surface material is passed into a drying equipment for drying treatment.

[0006] A further improvement of the technical solution of the present invention is that: 1.5 hours after the start of the reaction in S3, the remaining initiator and part of the organic solvent are stirred evenly, directly added to the reactor, and the heat preservation treatment is continued for 6 hours.

[0007] The further improvement of the technical solution of the present invention is that: after the reaction is completed, an organic solvent is added, the temperature is lowered to 30-40°C, and the mixture is stirred evenly, the auxiliary agent is dissolved in the remaining organic solvent, and the mixture is uniformly added dropwise to the reactor, and the mixture is stirred evenly to obtain a pressure-sensitive adhesive material.

[0008] A further improvement of the technical solution of the present invention is: preparing a certain weight of a cross-linking agent, adding a certain amount of flux to the cross-linking agent, adding the obtained pressure-sensitive adhesive material, continuously stirring at high speed to obtain a uniform liquid adhesive, using a coating machine to coat the adhesive liquid on the TPU substrate, and adjusting the thickness after oven drying.

[0009] A further improvement of the technical solution of the present invention is that: S4 repeatedly rubs one of the areas, then tears off the test film, observes the anti-scratch effect of the test film, punctures the test film with a sharp tool, feels the puncture resistance and puncture resistance of the test film, pulls both ends of the test film to make the test film contact with the side wall of the through hole, feels the maximum breaking strength of the test film, applies corrosive liquid to the test film part and the exposed part, tests the corrosion resistance, stretches and releases the test film, and observes the rebound effect of the test film.

[0010] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: The present invention provides a method for making an invisible car cover. Through performance testing, the prepared protective film is fixed on a test plate, and different test areas are divided. Friction, puncture, breaking strength, corrosion resistance, flame retardancy, and rebound effects are tested in different areas. Through various tests, consumers can actually feel the heat self-repairing performance, anti-scratch effect, puncture resistance and force capacity, maximum breaking strength performance, maximum rope length performance, corrosion resistance, anti-burning performance and rebound performance of the test film, thereby improving consumers' perception and facilitating the promotion and sales of invisible car covers.

[0011] The invention provides a method for making an invisible car cover. Under the action of an adhesive preparation, an auxiliary agent is dissolved in a residual organic solvent, and the mixture is uniformly added dropwise to a reaction kettle and stirred to obtain a pressure-sensitive adhesive material. The method solves the problems of high initial adhesion, low peeling, much residual adhesive, and poor weather resistance of pressure-sensitive adhesives, and achieves the requirements of easy peeling and firmness of the car cover film pressure-sensitive adhesive. The method can be widely used to meet the requirements of pressure-sensitive adhesives for car cover films. The method solves the problem of inconvenience in repeated operation during the application of the car cover film due to high initial adhesion, and makes the car cover more firmly bonded to the car body, thereby preventing warping and residual adhesive from appearing when peeling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall process structure of a method for making an invisible car cover of the present invention; Figure 2 The present invention is a schematic diagram of the process structure of the preparation. DETAILED DESCRIPTION

[0013] The present invention is further described in detail below in conjunction with embodiments: Embodiment 1

[0014] like Figure 1-2 As shown, the present invention provides a method for making an invisible car cover, comprising the following steps: S1. Prepare materials: The raw materials of the composite layer include fluorine-containing acrylic resin, curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate; the raw materials of the adhesive layer include polyacrylate, acrylic curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate; S2. Preparation: Select TPU surface material as manufacturing raw material, preheat the selected TPU in an oven, and dry the water inside the TPU material; S3, adhesive preparation: add the adhesive raw materials into the reaction kettle and mix them evenly, heat them to 70-85°C under nitrogen protection, stir the initiator and organic solvent evenly, add them into the reaction kettle, continue to heat until there is a vigorous reaction in the kettle, and control the reaction temperature at 80-85°C; S4. Performance test: Fix the prepared protective film on the test board, divide it into different test areas, and test the friction, puncture, breaking strength, corrosion resistance, flame retardancy, and rebound effects in different areas.

[0015] In this implementation case, different test areas are divided, and friction, puncture, breaking strength, corrosion resistance, flame retardancy, and rebound effect tests are carried out in different areas. Through various tests, consumers can actually feel the test film's self-healing properties when exposed to heat, anti-scratch effect, puncture resistance and force capacity, maximum breaking strength performance, maximum rope draw length performance, corrosion resistance, anti-burning performance and rebound performance, thereby enhancing consumers' perception and facilitating the promotion and sales of car covers. Embodiment 2

[0016] like Figure 1-2 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, S2 takes a TPU substrate, evenly coats the upper surface of the TPU substrate with self-repairing glue, and then puts it into an oven for baking at a temperature of 55 to 125°C, forms a repair layer on the upper surface of the TPU substrate layer, and then adheres a PET protective film to the surface of the repair layer to obtain a semi-finished product, and performs a coating treatment on the obtained semi-finished product. The coating formula during the coating treatment selects PP particles to coat the surface material through a coating machine. After the coating treatment is completed, a polymer removable glue and a light sub-PET are coated on one side of the TPU surface material, and then the TPU surface material is passed into a drying device for drying. After S3 starts to react for 1.5 hours, the remaining initiator and part of the organic solvent are stirred evenly, directly added to the reactor, and the heat preservation treatment is continued for 6 hours. After the reaction is completed, add Organic solvent, cool to 30-40℃, stir evenly, dissolve the additive in the remaining organic solvent, add it dropwise to the reactor at a uniform speed, stir evenly, obtain a pressure-sensitive adhesive material, prepare a certain weight of cross-linking agent, add a certain amount of flux to the cross-linking agent, add the obtained pressure-sensitive adhesive material, stir continuously and at high speed to obtain a uniform liquid glue, use a coating machine to coat the glue on the TPU substrate, after oven drying, adjust the thickness, rub S4 repeatedly in one of the areas, then tear off the test film, observe the anti-scratch effect of the test film, puncture the test film with a sharp tool, feel the puncture resistance and puncture resistance of the test film, pull both ends of the test film to make the test film contact with the side wall of the through hole, feel the maximum breaking strength of the test film, apply corrosive liquid on the test film part and the exposed part, test the corrosion resistance, stretch and release the test film, and observe the rebound effect of the test film.

[0017] In this embodiment, a pressure-sensitive adhesive material is obtained, which solves the problems of high initial adhesion, low peeling force, much residual adhesive, and poor weather resistance of pressure-sensitive adhesives, and achieves the requirements of easy peeling and firmness of the pressure-sensitive adhesive for car cover films. It can be widely used to meet the pressure-sensitive adhesive for car cover films, and solves the problem of inconvenience in repeated operation during the application of car cover films due to high initial adhesion, while making the car cover more firmly bonded to the car body and preventing warping and residual adhesive when peeling off.

[0018] The following is a detailed description of the working principle of the method for making this invisible car cover.

[0019] like Figure 1-2As shown, the raw materials of the composite layer include fluorine-containing acrylic resin, curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate; the raw materials of the adhesive layer include polyacrylate, acrylic curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate, TPU surface material is selected as the manufacturing raw material, the selected TPU is preheated in an oven, the water inside the TPU material is dried, the TPU substrate is taken, the self-repairing glue is evenly coated on the upper surface of the TPU substrate, and then it is placed in an oven for baking at a temperature of 55 to 125°C to form a repair layer on the upper surface of the TPU substrate layer. Then, a PET protective film is attached to the surface of the repair layer to obtain a semi-finished product, and the semi-finished product is subjected to a coating treatment. The coating formula during the coating treatment uses PP particles to coat the surface material through a coating machine. After the coating treatment is completed, a polymer removable adhesive and a light PET are coated on one side of the TPU surface material. Then, the TPU surface material is passed into a drying device for drying. The adhesive raw material is added to the reactor and mixed evenly. The mixture is heated to 70-85°C under nitrogen protection. The initiator and the organic solvent are stirred evenly and added to the reactor. The temperature is continuously raised until a violent reaction occurs in the reactor. The reaction temperature is controlled at 80-85°C to start the reaction 1.After 5 hours, the remaining initiator and part of the organic solvent are stirred evenly, directly added to the reactor, and the heat preservation treatment is continued for 6 hours. After the reaction is completed, the organic solvent is added, the temperature is lowered to 30-40°C, and the stirring is even. The auxiliary agent is dissolved in the remaining organic solvent, and the mixture is added dropwise to the reactor at a uniform speed and stirred evenly to obtain a pressure-sensitive adhesive material. A certain weight of a cross-linking agent is prepared, and a certain amount of a flux is added to the cross-linking agent. After the pressure-sensitive adhesive material is added, the mixture is stirred continuously at a high speed to obtain a uniform liquid adhesive. The adhesive is coated on the TPU substrate by a coating machine. After drying in an oven, the thickness is adjusted to obtain a pressure-sensitive adhesive material. The problems of high initial adhesion, low peeling, much residual adhesive, and poor weather resistance of pressure-sensitive adhesives are solved, and the requirements of easy peeling and firmness of the pressure-sensitive adhesive for car cover films are achieved. The pressure-sensitive adhesive for car cover films can be widely used in pressure-sensitive adhesives for car cover films. The problem of repeated operability inconvenience caused by high initial adhesion during the film coating process is solved, and the car cover is firmly bonded to the car body to prevent warping and peeling. When residual glue appears, fix the prepared protective film on the test board, divide different test areas, and test the friction, puncture, breaking strength, corrosion resistance, flame retardancy, and rebound effects in different areas. Repeatedly rub in one area, then tear off the test film, observe the anti-scratch effect of the test film, puncture the test film with a sharp tool, feel the puncture resistance and strength of the test film, pull the two ends of the test film to make the test film contact with the side wall of the through hole, feel the maximum breaking strength of the test film, apply corrosive liquid to the test film part and the exposed part, test the corrosion resistance, stretch and release the test film, observe the rebound effect of the test film, and test the friction, puncture, breaking strength, corrosion resistance, flame retardancy, and rebound effects in different areas. Through various tests, consumers can actually feel the heat self-repairing performance, scratch resistance, puncture resistance and strength capacity, maximum breaking strength performance, maximum rope length performance, corrosion resistance, and anti-combustion performance of the test film. .

[0020] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A method for making an invisible car cover, comprising the following steps, characterized in that: S1. Prepare materials: The raw materials of the composite layer include fluorine-containing acrylic resin, curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate; the raw materials of the adhesive layer include polyacrylate, acrylic curing agent, ultraviolet absorber, antioxidant, coupling agent, ethyl acetate and butyl acetate; S2. Preparation: Select TPU surface material as manufacturing raw material, preheat the selected TPU in an oven, and dry the water inside the TPU material; S3, adhesive preparation: add the adhesive raw materials into the reaction kettle and mix them evenly, heat them to 70-85°C under nitrogen protection, stir the initiator and organic solvent evenly, add them into the reaction kettle, continue to heat until there is a vigorous reaction in the kettle, and control the reaction temperature at 80-85°C; S4. Performance test: Fix the prepared protective film on the test board, divide it into different test areas, and test the friction, puncture, breaking strength, corrosion resistance, flame retardancy, and rebound effects in different areas.

2. The method for making an invisible car cover according to claim 1, characterized in that: S2 takes a TPU substrate, evenly applies self-repairing glue on the upper surface of the TPU substrate, and then puts it into an oven for baking at a temperature of 55 to 125° C., so as to form a repair layer on the upper surface of the TPU substrate layer, and then adheres a PET protective film to the surface of the repair layer to obtain a semi-finished product.

3. The method for making an invisible car cover according to claim 2, characterized in that: The obtained semi-finished product is subjected to laminating treatment. The laminating formula during the laminating treatment selects PP particles to carry out laminating treatment on the surface material through a laminating machine. After the laminating treatment is completed, a polymer transferable glue and a light PET are coated on one side of the TPU surface material, and then the TPU surface material is passed into a drying equipment for drying treatment.

4. The method for making an invisible car cover according to claim 1, characterized in that: 1.5 hours after the start of the reaction of S3, the remaining initiator and part of the organic solvent were stirred evenly, directly added into the reactor, and the heat preservation treatment was continued for 6 hours.

5. The method for making an invisible car cover according to claim 4, characterized in that: After the reaction is completed, an organic solvent is added, the temperature is lowered to 30-40° C., and the mixture is stirred evenly. The auxiliary agent is dissolved in the remaining organic solvent, and the mixture is added dropwise to the reaction kettle at a uniform speed, and the mixture is stirred evenly to obtain a pressure-sensitive adhesive material.

6. The method for making an invisible car cover according to claim 5, characterized in that: Prepare a certain weight of cross-linking agent, add a certain amount of flux to the cross-linking agent, add the obtained pressure-sensitive adhesive material, and stir continuously at high speed to obtain a uniform liquid adhesive. Use a coating machine to apply the adhesive liquid on the TPU substrate, and adjust the thickness after drying in an oven.

7. The method for making an invisible car cover according to claim 1, characterized in that: S4 rubs one of the areas repeatedly, then tears off the test film, observes the anti-scratch effect of the test film, punctures the test film with a sharp object, feels the puncture resistance and puncture force of the test film, pulls both ends of the test film to make the test film contact with the side wall of the through hole, feels the maximum breaking strength of the test film, applies corrosive liquid to the test film part and the exposed part, tests the corrosion resistance, stretches and releases the test film, and observes the rebound effect of the test film.

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