Preparation process of automobile column functional film

Abstract

The invention discloses a preparation process of an automobile column functional film, and relates to the technical field of preparation of automobile functional films, the preparation process comprises the following steps: S1, preparing materials; s2, carrying out pretreatment; s3, a bright layer is prepared, specifically, diethyl p-toluenesulfonyloxymethylphosphonate, a tin light stabilizer, zinc octoate and propylene glycol methyl ether acetate in a bright coating component are sequentially added into a stirring barrel, the heating and stirring temperature in the stirring barrel is 30 DEG C, and the heat preservation reaction time is 30 min; the stirring rotating speed is 150r / min; and S4, assembling and laminating. According to the invention, the acrylic pressure-sensitive adhesive is coated on the release paper and is attached to the back surface of the PVC black film, so that the degree of freedom of automobile design is improved, and a good decorative effect is achieved. In addition, the shielding link is omitted, the automobile production process can be simplified, the production efficiency is improved, the automobile system production cost is saved, installation is convenient, the air permeability is high, the ventilation function is good, it is guaranteed that the pressure-sensitive adhesive makes full contact with the metal surface, bubbles cannot be generated, and the pressure-sensitive adhesive is more attractive and smoother and has very high toughness.

Description

Technical Field

[0001] The invention relates to the technical field of preparation of automobile functional films, and in particular to a preparation process of an automobile pillar functional film. Background Art

[0002] Black film, also known as Blackout Film, is a kind of functional car film. It is used on the pillars, window frames and other parts of the car to replace paint for decoration, which can expand the vision of the windows and windshields. However, with the widespread use of this decorative component, the problems it brings are becoming increasingly prominent. Specifically: on the customer's assembly line, when the black film is pasted on the B-pillar of the car window frame, when the corner is slightly 90 degrees, it is easy to cause problems such as warping due to the stretching of the film itself, which seriously affects the customer's production rhythm and quality requirements. The following problems exist in the existing technology: 1. The existing preparation process of functional film for automobile pillars, the car body after filming is not beautiful enough, the vehicle market competitiveness is small, the hardness is low, and the weather resistance, stone impact resistance, scratch resistance and abrasion resistance of the black film are poor; 2. The existing preparation process of the functional film for the automobile pillar has a short service life and is easy to fall off. It cannot ensure that the black film has the same service life as the car. The air permeability of the automobile black film is low and the ventilation function is poor. Summary of the invention

[0003] In order to solve the above technical problems, the technical solution adopted by the present invention is: A process for preparing a functional film for a vehicle pillar comprises the following steps: S1. Prepare materials: positioning paper, glossy coating, PVC black film, acrylic pressure-sensitive adhesive and release paper, diethyl p-toluenesulfonyloxymethylphosphonate, tin light stabilizer, zinc octanoate, propylene glycol methyl ether acetate, polyisocyanate, butyl acetate cellulose, and butanone; S2. Pretreatment: acrylic acid, ethyl acetate, dibenzoyl peroxide, toluene, and isooctyl acrylate are added to a reactor in sequence, heated to 90° C. in the reactor, and kept warm for 45 minutes. The mixture is cooled and formed, and stored in a sealed vacuum package. Before use, a crosslinking agent is added according to the mass percentage, and after stirring for 25 minutes, a breathable automotive black film is applied; S3, preparing a bright layer: adding diethyl p-toluenesulfonyloxymethylphosphonate, tin light stabilizer, zinc octoate, and propylene glycol methyl ether acetate in the bright coating component into a stirring barrel in sequence, heating and stirring the stirring barrel at a temperature of 30° C., and keeping the temperature for reaction for 30 min; stirring at a speed of 150 r / min; S4. Assembly and lamination: Apply the glossy coating on the front side of the PVC black film, i.e. the glossy side, through a coating machine and laminate it with the positioning paper; then apply the acrylic pressure-sensitive adhesive on the isolation paper and laminate it with the back side of the PVC black film.

[0004] A further improvement of the technical solution of the present invention lies in that: zinc octoate is a 200# solvent oil dilution solution of zinc octoate with a zinc mass fraction of 8%, and the bright coating contains: 40 parts of diethyl p-toluenesulfonyloxymethylphosphonate, 3 parts of tin light stabilizer, 0.3 part of 8% zinc octoate, 5.2 parts of propylene glycol methyl ether acetate, 30 parts of polyisocyanate, 10 parts of cellulose acetate butyrate, and 12 parts of methyl ethyl ketone.

[0005] A further improvement of the technical solution of the present invention lies in that: the acrylic pressure-sensitive adhesive contains: 6 parts of acrylic acid, 25 - 30 parts of ethyl acetate, 1 part of benzoyl peroxide, 40 - 43 parts of toluene, 26 - 30 parts of isooctyl acrylate, and 1.5 - 1.6 parts of cross-linking agent.

[0006] A further improvement of the technical solution of the present invention lies in that: the cross-linking agent is 3-methyltetrahydrothiazole-2-thione, the PVC black film is a high-gloss black film, the total thickness of the PVC black film and the acrylic pressure-sensitive adhesive is 0.155 - 0.165 mm, preferably 0.160 mm.

[0007] A further improvement of the technical solution of the present invention lies in that: in S3, cellulose acetate butyrate and methyl ethyl ketone in the bright coating components are successively added to the well-stirred mixture, the heating and stirring temperature in the stirring tank is raised to 40 °C, and the heat preservation reaction time is 45 min; the stirring speed is 300 r / min to obtain the finished bright coating and set it aside.

[0008] A further improvement of the technical solution of the present invention lies in that: in S4, it is finally stored in the warehouse after being hermetically packaged to obtain the finished functional film. The heat preservation reaction time during the production process is 35 min; the stirring speed is 155 r / min; the second heat preservation reaction time is 50 min; the stirring speed is 50 r / min.

[0009] Due to the adoption of the above technical solution, the technical progress achieved by the present invention compared with the prior art is: The present invention provides a preparation process for a functional film of an automobile pillar. Under the action of the PVC black film, the PVC black film is a high-gloss black film, the total thickness of the PVC black film and the acrylic pressure-sensitive adhesive is 0.155 - 0.165 mm, preferably 0.160 mm. The glossiness is greatly improved, approaching the mirror effect, increasing the beauty of the vehicle body, improving the competitiveness of the vehicle, greatly improving the weather resistance, anti-aging, anti-yellowing, and anti-ultraviolet capabilities, extending the service life of the product, being scratch-resistant and abrasion-resistant, acid and alkali-resistant, stone-impact-resistant, water gun impact-resistant, easy to clean, with a strong design sense, and the visual effect is increased, natural and generous; it improves the freedom of automobile design and has a good decorative effect.

[0010] The present invention provides a preparation process for an automotive pillar functional film. Through the combined action of preparing a bright layer and assembling and laminating, diethyl (tosyloxymethyl)phosphonate, tin light stabilizer, zinc octoate, and propylene glycol methyl ether acetate in the bright coating component are successively added to a stirring tank. The bright coating is coated on the front side of the PVC black film, i.e., the bright side, through a coater, and is laminated with positioning paper; then, an acrylic pressure-sensitive adhesive is coated on the release paper and laminated with the back side of the PVC black film. This improves the freedom of automotive design and has a good decorative effect. Additionally, the masking process is omitted, which can simplify the automotive production process, improve production efficiency, save the production cost of the automotive system, is convenient to install, has a high air permeability, good air permeability function, ensures full contact between the pressure-sensitive adhesive and the metal surface, does not generate bubbles, is more beautiful and smooth, and has strong toughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of a preparation process for an automotive pillar functional film of the present invention; Figure 2 is a schematic structural diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The following further describes the present invention in detail with reference to embodiments: Embodiment 1

[0013] As Figure 1-2 shown, the present invention provides a preparation process for an automotive pillar functional film, including the following steps: S1. Prepare materials: positioning paper, bright coating, PVC black film, acrylic pressure-sensitive adhesive, and release paper, diethyl (tosyloxymethyl)phosphonate, tin light stabilizer, zinc octoate, propylene glycol methyl ether acetate, polyisocyanate, cellulose acetate butyrate, and methyl ethyl ketone; S2. Perform pretreatment: Acrylic acid, ethyl acetate, benzoyl peroxide, toluene, and isooctyl acrylate are successively added to a reaction kettle, heated to 90°C in the reaction kettle, kept at a constant temperature for reaction for 45 minutes, the mixture is cooled and formed, stored in the warehouse after being sealed and vacuum-packed, and before use, a cross-linking agent is added according to the mass percentage content, stirred for 25 minutes, and then a breathable automotive black film is coated; S3. Prepare the bright layer: Diethyl (tosyloxymethyl)phosphonate, tin light stabilizer, zinc octoate, and propylene glycol methyl ether acetate in the bright coating component are successively added to a stirring tank. The heating and stirring temperature in this stirring tank is 30°C, and the holding reaction time is 30 minutes; the stirring speed is 150 r / min; S4. Assemble and laminate: The bright coating is coated on the front side of the PVC black film, i.e., the bright side, through a coater, and is laminated with the positioning paper; then, the acrylic pressure-sensitive adhesive is coated on the release paper and laminated with the back side of the PVC black film.

[0014] In this embodiment, the degree of freedom in automotive design is increased, and it has a good decorative effect. Additionally, the masking process is eliminated, which can simplify the automotive production process, improve production efficiency, save the production cost of the automotive system, is easy to install, has a high air permeability, good air permeability function, ensures full contact between the pressure-sensitive adhesive and the metal surface, does not generate bubbles, is more beautiful and smooth, and has strong toughness. Example 2

[0015] As Figure 1-2 shown, based on Example 1, the present invention provides a technical solution: Preferably, zinc octoate is a 200# solvent oil dilution solution of zinc octoate with a zinc mass fraction of 8%. The bright coating contains: 40 parts of diethyl (tosyloxymethyl)phosphonate, 3 parts of tin light stabilizer, 0.3 parts of 8% zinc octoate, 5.2 parts of propylene glycol methyl ether acetate, 30 parts of polyisocyanate, 10 parts of cellulose acetate butyrate, and 12 parts of methyl ethyl ketone. The acrylic pressure-sensitive adhesive contains: 6 parts of acrylic acid, 25 - 30 parts of ethyl acetate, 1 part of benzoyl peroxide, 40 - 43 parts of toluene, 26 - 30 parts of isooctyl acrylate, and 1.5 - 1.6 parts of crosslinking agent. The crosslinking agent is 3-methyltetrahydrothiazole-2-thione. The PVC black film is a high-gloss black film. The total thickness of the PVC black film and the acrylic pressure-sensitive adhesive is 0.155 - 0.165 mm, preferably 0.160 mm. In S3, cellulose acetate butyrate and methyl ethyl ketone in the bright coating components are sequentially added to the well-stirred mixture, the heating and stirring temperature in the stirring tank is raised to 40°C, and the heat preservation reaction time is 45 min; the stirring speed is 300 r / min to obtain the finished bright coating and set it aside. In S4, finally, after being sealed and packaged, it is stored in the warehouse to obtain the finished functional film. The heat preservation reaction time during the production process is 35 min; the stirring speed is 155 r / min; the second heat preservation reaction time is 50 min; the stirring speed is 50 r / min.

[0016] In this embodiment, the total thickness of the PVC black film and the acrylic pressure-sensitive adhesive is 0.155 - 0.165 mm, preferably 0.160 mm. The glossiness is greatly improved, approaching the mirror effect, increasing the beauty of the vehicle body, enhancing the competitiveness of the vehicle, and greatly improving the weather resistance, anti-aging, anti-yellowing, and anti-ultraviolet capabilities, extending the service life of the product, being scratch-resistant and abrasion-resistant, acid and alkali-resistant, stone impact-resistant, water gun impact-resistant, easy to clean, having a strong design sense, and increasing the visual effect, being natural and generous; it increases the degree of freedom in automotive design and has a good decorative effect.

[0017] Next, specifically describe the working principle of the preparation process of the automotive pillar functional film.

[0018] As Figure 1-2As shown in the figure, prepare the materials: positioning paper, brightening coating, PVC black film, acrylic pressure-sensitive adhesive, and release paper, diethyl (tosyloxymethyl) phosphonate, tin light stabilizer, zinc octoate, propylene glycol methyl ether acetate, polyisocyanate, cellulose acetate butyrate, and methyl ethyl ketone. Zinc octoate is a 200# solvent oil dilution solution of zinc octoate with a zinc mass fraction of 8%. The brightening coating contains: 40 parts of diethyl (tosyloxymethyl) phosphonate, 3 parts of tin light stabilizer, 0.3 parts of 8% zinc octoate, 5.2 parts of propylene glycol methyl ether acetate, 30 parts of polyisocyanate, 10 parts of cellulose acetate butyrate, and 12 parts of methyl ethyl ketone. The acrylic pressure-sensitive adhesive contains: 6 parts of acrylic acid, 25 - 30 parts of ethyl acetate, 1 part of benzoyl peroxide, 40 - 43 parts of toluene, 26 - 30 parts of isooctyl acrylate, and 1.5 - 1.6 parts of crosslinking agent. The crosslinking agent is 3-methyltetrahydrothiazole-2-thione. The PVC black film is a high-gloss black film. The total thickness of the PVC black film and the acrylic pressure-sensitive adhesive is 0.155 - 0.165 mm, preferably 0.160 mm. The acrylic pressure-sensitive adhesive is coated on the release paper and adhered to the back of the PVC black film, which improves the freedom of automotive design and has a good decorative effect. In addition, the masking process is omitted, which can simplify the automotive production process, improve production efficiency, save the production cost of the automotive system, is easy to install, has a high air permeability, and a good air permeability function, ensuring full contact between the pressure-sensitive adhesive and the metal surface, without generating bubbles, being more beautiful and smooth, and having strong toughness. Acrylic acid, ethyl acetate, benzoyl peroxide, toluene, and isooctyl acrylate are added to the reaction kettle in sequence, heated to 90 °C in the reaction kettle, and kept warm for reaction for 45 min. The mixture is cooled and formed, and stored in the warehouse after being sealed and vacuum-packed. Before use, calculated by mass percentage, the crosslinking agent is added and stirred for 25 min, and then the breathable automotive black film is coated. Diethyl (tosyloxymethyl) phosphonate, tin light stabilizer, zinc octoate, and propylene glycol methyl ether acetate in the brightening coating components are added to the stirring barrel in sequence. The heating and stirring temperature in this stirring barrel is 30 °C, and the heat preservation reaction time is 30 min; the stirring speed is 150 r / min. Cellulose acetate butyrate and methyl ethyl ketone in the brightening coating components are added to the well-stirred mixture in sequence, and the heating and stirring temperature in the stirring barrel is raised to 40 °C, and the heat preservation reaction time is 45 min; the stirring speed is 300 r / min to obtain the finished brightening coating for standby. The acrylic pressure-sensitive adhesive is coated on the release paper and adhered to the back of the PVC black film, which improves the freedom of automotive design and has a good decorative effect.In addition, omitting the shielding link can simplify the automobile production process, improve production efficiency, save the production cost of the automobile system, is easy to install, has a high air permeability and good air permeability function, ensures full contact between the pressure-sensitive adhesive and the metal surface, does not generate bubbles, is more beautiful and smooth, has strong toughness, coats the bright coating on the front side of the PVC black film, that is, the bright side, through a coater and laminates it with the positioning paper; then coats the acrylic pressure-sensitive adhesive on the release paper and laminates it with the back side of the PVC black film, and finally stores it in the warehouse after sealed packaging to obtain the finished functional film. The heat preservation reaction time during the production process is 35 minutes; the stirring speed is 155 r / min; the second heat preservation reaction time is 50 minutes; the stirring speed is 50 r / min.

[0019] The above text has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. Preparation process of an automotive pillar functional film, comprising the following steps, characterized in that: S1. Prepare materials: positioning paper, bright coating, PVC black film, acrylic pressure-sensitive adhesive, and release paper, diethyl (tosyloxymethyl) phosphonate, tin light stabilizer, zinc octoate, propylene glycol methyl ether acetate, polyisocyanate, cellulose acetate butyrate, and methyl ethyl ketone; S2. Perform pretreatment: Add acrylic acid, ethyl acetate, benzoyl peroxide, toluene, and isooctyl acrylate into the reaction kettle in sequence, heat to 90 °C in the reaction kettle, keep the temperature for reaction for 45 min, cool and mold the mixture, store it in the warehouse after sealed vacuum packaging. Before use, add a crosslinking agent according to the mass percentage, stir for 25 min, and then coat a breathable automotive black film; S3. Prepare the bright layer: Add diethyl (tosyloxymethyl) phosphonate, tin light stabilizer, zinc octoate, and propylene glycol methyl ether acetate in the bright coating components into the stirring barrel in sequence. The heating and stirring temperature in the stirring barrel is 30 °C, and the holding reaction time is 30 min; the stirring speed is 150 r / min; S4. Assemble and bond: Coat the bright coating on the front side of the PVC black film, i.e., the bright side, through a coater and bond it with the positioning paper; then coat the acrylic pressure-sensitive adhesive on the release paper and bond it with the back side of the PVC black film.

2. The preparation process of an automotive pillar functional film according to claim 1, characterized in that: S1 Zinc octoate is a 200# solvent oil dilution solution of zinc octoate with a zinc mass fraction of 8%. The bright coating contains: 40 parts of diethyl (tosyloxymethyl) phosphonate, 3 parts of tin light stabilizer, 0.3 parts of 8% zinc octoate, 5.2 parts of propylene glycol methyl ether acetate, 30 parts of polyisocyanate, 10 parts of cellulose acetate butyrate, and 12 parts of methyl ethyl ketone.

3. The preparation process of an automotive pillar functional film according to claim 1, characterized in that: The acrylic pressure-sensitive adhesive contains: 6 parts of acrylic acid, 25 - 30 parts of ethyl acetate, 1 part of benzoyl peroxide, 40 - 43 parts of toluene, 26 - 30 parts of isooctyl acrylate, and 1.5 - 1.6 parts of crosslinking agent.

4. The preparation process of an automotive pillar functional film according to claim 1, characterized in that: The crosslinking agent is 3-methyltetrahydrothiazole-2-thione. The PVC black film is a high-gloss black film. The total thickness of the PVC black film and the acrylic pressure-sensitive adhesive is 0.155 - 0.165 mm, preferably 0.160 mm.

5. The preparation process of an automotive pillar functional film according to claim 1, characterized in that: S3 Add cellulose acetate butyrate and methyl ethyl ketone in the bright coating components into the well-stirred mixture in sequence, raise the heating and stirring temperature in the stirring barrel to 40 °C, keep the temperature for reaction for 45 min; the stirring speed is 300 r / min to obtain the finished bright coating and set it aside.

6. The preparation process of an automotive pillar functional film according to claim 1, characterized in that: Finally, it is stored in the warehouse after being sealed and packaged to obtain the finished functional film. During the production process, the heat preservation reaction time is 35 minutes; the stirring speed is 155 r / min; the second heat preservation reaction time is 50 minutes; the stirring speed is 50 r / min.

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