CN111101106A - Film coating method for surface of vehicle-mounted plastic product and vehicle-mounted plastic product - Google Patents

Film coating method for surface of vehicle-mounted plastic product and vehicle-mounted plastic product Download PDF

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Publication number
CN111101106A
CN111101106A CN202010030613.5A CN202010030613A CN111101106A CN 111101106 A CN111101106 A CN 111101106A CN 202010030613 A CN202010030613 A CN 202010030613A CN 111101106 A CN111101106 A CN 111101106A
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CN
China
Prior art keywords
plastic
layer
coating
vehicle
plastic substrate
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Pending
Application number
CN202010030613.5A
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Chinese (zh)
Inventor
黄军元
刘文虎
甘有维
邱剑锋
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Swell Marui Guangzhou Automobile Parts Co ltd
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Swell Marui Guangzhou Automobile Parts Co ltd
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Application filed by Swell Marui Guangzhou Automobile Parts Co ltd filed Critical Swell Marui Guangzhou Automobile Parts Co ltd
Priority to CN202010030613.5A priority Critical patent/CN111101106A/en
Publication of CN111101106A publication Critical patent/CN111101106A/en
Pending legal-status Critical Current

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    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/34Sputtering
    • C23C14/35Sputtering by application of a magnetic field, e.g. magnetron sputtering
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254After-treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/14Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
    • B05D7/16Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/02Pretreatment of the material to be coated
    • C23C14/021Cleaning or etching treatments
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14Metallic material, boron or silicon
    • C23C14/20Metallic material, boron or silicon on organic substrates
    • C23C14/205Metallic material, boron or silicon on organic substrates by cathodic sputtering
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/58After-treatment
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/48After-treatment of electroplated surfaces
    • CCHEMISTRY; METALLURGY
    • C25ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25DPROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D5/00Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
    • C25D5/54Electroplating of non-metallic surfaces
    • C25D5/56Electroplating of non-metallic surfaces of plastics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2451/00Type of carrier, type of coating (Multilayers)

Abstract

The invention relates to a film coating method for the surface of a vehicle-mounted plastic product. The method transfers a first film coating material to the surface of a plastic substrate to form an adhesion layer, and carries out curing treatment on the adhesion layer. After the adhesive layer is cured, a metal plating layer is formed on the surface of the adhesive layer to metalize the surface of the plastic substrate, thereby showing metallic luster. In the vacuum plating process, due to the existence of the adhesion layer, the adhesion force of the metal coating can be effectively improved, so that the metal coating is not easy to fall off, and the metal luster of the surface of a plastic product can be kept for a longer time. After the metal plating layer is formed, the second coating material is transferred to the surface of the metal plating layer to form a protective layer, and then the protective layer is subjected to curing treatment. According to the film coating method, the adhesion layer, the metal coating and the protective layer are sequentially formed on the surface of the plastic substrate, so that the metalized film layer which is good in adhesion, weather resistance and light transmission and can enable radar waves to pass smoothly can be formed on the surface of the plastic substrate.

Description

Film coating method for surface of vehicle-mounted plastic product and vehicle-mounted plastic product
Technical Field
The invention relates to the technical field of processing of automobile-mounted products, in particular to a film coating method for the surface of an automobile-mounted plastic product and the automobile-mounted plastic product.
Background
Plastic products are widely used in industrial production because of their light weight and ease of mass production. Especially the development and application of environment-friendly plastics, further expand the application range of plastics. In the actual use of plastics, some processing of the surface of the plastic is often required to give the surface of the plastic various appearances and excellent weather resistance. Among them, the metallization of the plastic surface is a wide appeal in the field of current plastic product processing, and consumers expect that the plastic product has an excellent metallized surface and good weather resistance. In order to achieve metallization of the plastic surface, the conventional processing method is to use wet electroplating. Wet plating can achieve metallization on the surface of the plastic, but the adhesion of the plating layer obtained by wet plating on the surface of the plastic is poor, so that the weather resistance of the obtained plastic product is poor. Especially in the field of vehicle-mounted products of automobiles, not only is a metallized plastic product often required to have the characteristic of good weather resistance, but also the plastic product is required to have good light transmittance, and radar waves can smoothly pass through the metallized plastic product so as to ensure that the receiving of the interior of the automobile to external signals is not influenced and the sending of signals from the interior of the automobile to the outside is not influenced. However, the metalized plastic products obtained by the traditional wet electroplating method cannot meet the requirements of automobile products on light transmittance and smooth penetration of radar waves.
Disclosure of Invention
In view of the above, it is desirable to provide a method for coating a surface of a plastic product for vehicle use, by which a metallized film layer having good adhesion, weather resistance, and light transmittance and allowing radar waves to pass smoothly can be formed on the surface of the plastic product.
On the other hand, it is also necessary to provide a vehicle-mounted plastic product, which has the characteristics of strong weather resistance and good light transmittance, and radar waves can smoothly pass through the vehicle-mounted plastic product, so that the reception of external signals by the interior of the vehicle and the transmission of signals to the outside by the interior of the vehicle are not affected.
The specific technical scheme of the invention is as follows:
one object of the invention is to provide a coating method for the surface of a vehicle-mounted plastic product, which comprises the following steps:
pretreating the surface of the plastic substrate to remove static electricity and impurities on the surface of the plastic substrate;
transferring the first film coating material to the surface of the pretreated plastic substrate to form an adhesion layer;
curing the adhesion layer;
forming a metal coating on the surface of the adhesion layer by vacuum plating;
transferring a second film coating material to the surface of the metal coating to form a protective layer;
and curing the protective layer.
In one embodiment, the method for transferring the first coating material to the surface of the plastic substrate after pretreatment is as follows: spraying the first film coating material on the surface of the pretreated plastic substrate; the spraying conditions are as follows: the spraying pressure is 0.3 MPa-0.5 MPa, and the spraying speed is 85 mL/s-110 mL/s.
In one embodiment, the method for curing the adhesion layer comprises the following steps: the adopted power is 1500mJ/cm2~1700mJ/cm2The ultraviolet light cures the adhesive layer for 9 to 15 seconds.
In one embodiment, the vacuum plating is magnetron sputtering plating; the vacuum degree of the magnetron sputtering electroplating is 1.1 multiplied by 10-3Pa~1.5×10-3Pa, the electroplating time of the magnetron sputtering electroplating is 6-10 min.
In one embodiment, the target material for magnetron sputtering electroplating is indium or pickaxe; the distance between the target and the adhesion layer is 60-80 cm.
In one embodiment, the method for transferring the second coating material to the surface of the metal plating layer comprises the following steps: spraying the second film coating material on the surface of the metal coating to form a protective layer; the spraying conditions are as follows: the caliber of the spray gun is 1.2 mm-1.5 mm, and the spraying pressure is 0.2 MPa-0.5 MPa.
In one embodiment, the temperature for curing the protective layer is 75-85 ℃, and the time for curing is 60-90 min.
Another object of the present invention is to provide a vehicle-mounted plastic product, which includes a plastic substrate and a film layer disposed on a surface of the plastic substrate; the film layer is prepared by adopting the film coating method for the surface of the vehicle-mounted plastic product in any embodiment.
In one embodiment, the thickness of the adhesion layer is 15 μm to 35 μm.
In one embodiment, the protective layer has a thickness of 25 μm to 35 μm.
The film coating method for the surface of the vehicle-mounted plastic product comprises the steps of pretreating the surface of the plastic substrate, removing static electricity and impurities on the surface of the plastic substrate, improving the processability of the plastic substrate, and improving the adhesive force of the first film coating material on the surface of the plastic product. After the pretreatment, the first film coating material is transferred to the surface of the plastic substrate to form an adhesion layer, and the adhesion layer is subjected to a curing treatment. After the adhesive layer is cured, a metal plating layer is formed on the surface of the adhesive layer by vacuum plating, so that the surface of the plastic substrate is metalized and shows metallic luster. In the vacuum plating process, due to the existence of the adhesion layer, the adhesion force of the metal coating can be effectively improved, so that the metal coating is not easy to fall off, and the metal luster of the surface of the vehicle-mounted plastic product can be kept for a longer time. After the metal plating layer is formed, the second coating material is transferred to the surface of the metal plating layer to form a protective layer, and then the protective layer is subjected to curing treatment. The introduction of the protective layer can improve the weather resistance of the vehicle-mounted plastic product and prolong the service life of the vehicle-mounted plastic product. According to the film coating method for the surface of the vehicle-mounted plastic product, the adhesion layer, the metal coating and the protective layer are sequentially formed on the surface of the plastic substrate, so that the metalized film layer of the metalized film layer which has good adhesion, strong weather resistance and good light transmittance and can enable radar waves to smoothly pass can be formed on the surface of the plastic substrate.
The vehicle-mounted plastic product comprises a plastic substrate and a film layer arranged on the surface of the plastic substrate, wherein the film layer is prepared by the film coating method for the surface of the vehicle-mounted plastic product. The vehicle-mounted plastic product has the characteristics of strong weather resistance and good light transmission, and radar waves can smoothly pass through the plastic product, so that the receiving of the interior of an automobile to external signals is not influenced, and the signals sent to the outside from the interior of the automobile are not influenced.
Detailed Description
In order that the invention may be more fully understood, reference will now be made to the accompanying examples. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
An embodiment of the invention provides a film coating method for the surface of a plastic product, which comprises the following steps:
pretreating the surface of the plastic substrate to remove static electricity and impurities on the surface of the plastic substrate;
transferring the first film coating material to the surface of the pretreated plastic substrate to form an adhesion layer;
curing the adhesive layer;
forming a metal coating on the surface of the adhesion layer by vacuum plating;
transferring the second film coating material to the surface of the metal coating to form a protective layer;
and curing the protective layer.
In a specific example, the plastic substrate is a plastic product obtained by injection molding plastic raw material particles. The plastic raw material can be one or more of ABS plastic, ASA plastic, PC plastic, PMMA plastic and synthetic plastic of PC and ABS.
Preferably, the injection molding method comprises the following steps:
(1) and adding plastic raw material particles into a charging barrel of an injection molding machine through a hopper.
(2) The injection molding machine utilizes the rotation of the screw rod and the heating of the charging barrel to plasticize plastic raw material particles, and simultaneously, the plastic raw material particles are introduced into the charging barrel of the injection molding machine to form polymer melt.
(3) And (4) forward moving the screw for injection, firstly injecting the polymer melt into the mold, and filling the whole cavity with the plastic to obtain the plastic substrate.
In a specific example, the preprocessing method is as follows:
(1) the plastic substrate is placed on a workbench, and the pressure of the electrostatic gun is controlled to be 0.5 MPa-0.6 MPa.
(2) The plastic substrate was cleaned from left to right with an electrostatic gun and a brush. The front and back of the plastic substrate are blown and wiped for 3-4 times, and the side is blown and wiped for 2-3 times. Ensure that the surface of the plastic substrate has no impurities, scratches and other defects.
In this embodiment, the film coating method for the surface of the vehicle-mounted plastic product includes pretreating the surface of the plastic substrate, removing static electricity and impurities on the surface of the plastic substrate, improving the processability of the plastic substrate, and improving the adhesive force of the first film coating material on the surface of the plastic product. After the pretreatment, the first film coating material is transferred to the surface of the plastic substrate to form an adhesion layer, and the adhesion layer is subjected to a curing treatment. After the adhesive layer is cured, a metal plating layer is formed on the surface of the adhesive layer by vacuum plating, so that the surface of the plastic substrate is metalized and shows metallic luster. In the vacuum plating process, due to the existence of the adhesion layer, the adhesion force of the metal coating can be effectively improved, so that the metal coating is not easy to fall off, and the metal luster of the surface of a plastic product can be kept for a longer time. After the metal plating layer is formed, the second coating material is transferred to the surface of the metal plating layer to form a protective layer, and then the protective layer is subjected to curing treatment. The introduction of the protective layer can improve the weather resistance of the plastic product and prolong the service life of the plastic product. According to the film coating method for the surface of the plastic product, the adhesion layer, the metal coating and the protective layer are sequentially formed on the surface of the plastic substrate, so that the metallized film layer of the metallized film layer which has good adhesion, strong weather resistance and good light transmittance and can enable radar waves to smoothly pass through can be formed on the surface of the plastic substrate.
In one specific example, the method of transferring the first coating material to the surface of the plastic substrate after the pretreatment is: spraying a first film coating material on the surface of the pretreated plastic substrate; the spraying conditions were: the spraying pressure is 0.3 MPa-0.5 MPa, and the spraying speed is 85 mL/s-110 mL/s.
Preferably, the first coating material is a photocurable primer. Further preferably, the first coating material is a UV primer.
Specifically, the method for curing the adhesion layer comprises the following steps: the adopted power is 1500mJ/cm2~1700mJ/cm2The ultraviolet light cures the adhesive layer for 9 to 15 seconds. Preferably, the power used is 1500mJ/cm2~1700mJ/cm2The ultraviolet light cures the adhesive layer for 10 to 12 seconds. For example, the curing time may be 9s, 10s, 11s, 12s, 13s, 14 s. In the process of curing the adhesive layer, the curing temperature is controlled to be 60-70 ℃, the chain speed is 1.0 +/-0.2M/min, the percentage of the chain speed is 13.3 percent,
preferably, the thickness of the adhesion layer is 15 μm to 35 μm. The adhesion layer can effectively improve the adhesion of the metal coating and strengthen the metallization effect of vacuum plating in the range. The thickness of the adhesive layer is too small, the adhesive force improvement effect is not good enough, and the thickness of the plastic product is increased if the thickness is too large, so that the performance (such as light transmission, radar wave penetration function, touch control product induction function and the like) of the plastic product is adversely affected.
In one specific example, the vacuum plating is magnetron sputtering plating; the vacuum degree of magnetron sputtering plating is 1.1 multiplied by 10-3Pa~1.5×10-3Pa. Preferably, the vacuum degree of the magnetron sputtering plating is 1.3X 10-3Pa, the electroplating time of the magnetron sputtering electroplating is 6 min-10 min.
In a specific example, the target material for magnetron sputtering plating is indium or pickaxe; the distance between the target and the adhesion layer is 60 cm-80 cm.
In a specific example, the method of transferring the second coating material to the surface of the metal plating layer is: and spraying the second coating material on the surface of the metal coating to form a protective layer. Wherein, the spraying conditions are as follows: the caliber of the spray gun is 1.2 mm-1.5 mm, and the spraying pressure is 0.2 MPa-0.5 MPa. And in the spraying process, the thickness of the protective layer is controlled to be 25-35 mu m.
In one particular example, the second cover film material is a heat-curable transparent varnish.
In a specific example, the temperature for curing the protective layer is 75-85 ℃, and the time for curing is 60-90 min. Preferably, before the curing treatment, the protective layer is leveled for 10min to 15min under the environment with the temperature of 5 ℃ to 35 ℃ and the relative humidity of 20 percent to 60 percent.
In the film coating method for the surface of the plastic product in this embodiment, the adhesion layer, the metal plating layer and the protection layer are sequentially formed on the surface of the plastic substrate, so that the metalized film layer with good adhesion and strong weather resistance can be formed on the surface of the plastic substrate. Meanwhile, the metallized film layer obtained by the film coating method cannot influence the light transmittance of a plastic product, the radar wave penetration function of the ACC technology, the induction function of a touch product and the like. The metallized film layer obtained by the film coating method has good signal transmission performance under the conditions of various appearances, good adhesive force, strong weather resistance and the like, and can meet the requirements of consumers on functional plastic products.
Yet another embodiment of the present invention provides a vehicle-mounted plastic product, which includes a plastic substrate and a film layer disposed on a surface of the plastic substrate; the film layer is prepared by the film coating method for the surface of the vehicle-mounted plastic product.
The film layer comprises an adhesion layer, a metal coating and a protective layer. The adhesion layer is arranged on the surface of the plastic substrate, the metal coating is arranged on the surface of the adhesion layer, and the protective layer is arranged on the surface of the metal coating. The thickness of the adhesion layer is 15-35 μm, and the thickness of the protection layer is 25-35 μm. Preferably, the thickness of the adhesive layer is 15 μm to 25 μm, and the thickness of the adhesive layer may be 18 μm, 19 μm, 20 μm, 23 μm, 30 μm. The thickness of the protective layer was 25 μm, 27 μm, 28 μm, 30 μm, 32 μm. The thickness of the adhesive layer is too small, the adhesive force improvement effect is not good enough, and the thickness of the plastic product is increased if the thickness is too large, so that the performance (such as light transmission, radar wave penetration function, touch control product induction function and the like) of the plastic product is adversely affected. If the thickness of the protective layer is too small, it is difficult to achieve a good protective effect, and if the thickness of the protective layer is too large, it may have a certain adverse effect on signal transmission (such as radar wave transmission). The plastic product has the characteristics of strong weather resistance and good light transmission, and radar waves can smoothly pass through the plastic product, so that the receiving of the interior of the automobile to external signals is not influenced, and the signals sent to the outside from the interior of the automobile are not influenced.
The following are specific examples.
Example 1
In this embodiment, the plastic substrate is PC plastic, and the coating method includes:
(1) and obtaining the PC plastic to be processed through injection molding.
(2) Placing the PC plastic product to be processed on a workbench, and controlling the pressure of an electrostatic gun to be 0.5-0.6 MPa. The plastic substrate was cleaned from left to right with an electrostatic gun and a brush. The front and back of the plastic substrate are blown and wiped for 3-4 times, and the side is blown and wiped for 2-3 times. Ensure that the surface of the plastic substrate has no impurities, scratches and other defects.
(3) And spraying the UV light curing primer on the surface of the plastic substrate to form an adhesion layer with the thickness of 15-25 mu m. The spraying conditions are that the spraying pressure is 0.3 MPa-0.5 MPa and the spraying speed is 85 mL/s-110 mL/s.
(4) And curing the adhesion layer. The conditions of the curing treatment were: the adopted power is 1500mJ/cm2~1700mJ/cm2The adhesion layer is cured for 10 s.
(5) A metal plating layer is formed on the protective layer by magnetron sputtering plating. The vacuum degree of magnetron sputtering plating is 1.3 multiplied by 10-3Pa, and the electroplating time of magnetron sputtering electroplating is 6 min. The target is indium, and the distance between the target and the adhesion layer is 80 cm.
(6) And spraying the double-component thermosetting transparent varnish on the surface of the metal coating to obtain the protective layer. The spraying conditions were: the caliber of the spray gun is 1.2 mm-1.5 mm, the spraying pressure is 0.2 MPa-0.5 MPa, and the thickness of the protective layer is 25 mu m.
(7) And curing the protective layer. The curing temperature is 80 ℃ and the curing time is 70 min.
Comparative example 1
In the comparative example, the plastic substrate is electroplating ABS plastic, and the film coating method comprises the following steps:
(1) and obtaining the electroplating-grade ABS plastic product to be processed through injection molding.
(2) And placing the electroplating ABS plastic product to be processed on a workbench, and controlling the pressure of an electrostatic gun to be 0.5-0.6 MPa. The plastic substrate was cleaned from left to right with an electrostatic gun and a brush. The front and back of the plastic substrate are blown and wiped for 3-4 times, and the side is blown and wiped for 2-3 times. Ensure that the surface of the plastic substrate has no impurities, scratches and other defects.
(3) And forming a metal coating on the surface of the electroplating-grade ABS plastic product to be processed through water electroplating.
The plastic products obtained in example 1 and comparative example 1 were subjected to an adhesion test, a salt spray test, a light transmittance test, and a radar wave penetration test, respectively. The salt spray test is carried out according to GB/T10125, the light transmittance test is carried out by adopting a GB2410-80 method, and the radar wave penetration performance test is carried out by adopting a method of applying a millimeter wave radar to 77HZ car networking and an Advanced Driving Assistance System (ADAS).
The test results are: the adhesion test result of the plastic product in example 1 was 500gf/cm, and the adhesion test result of the plastic product in comparative example 1 was 300 gf/cm.
The plastic product of example 1 showed no significant corrosion on the outer surface after 600 hours in the salt spray test, whereas the plastic product of comparative example 1 showed significant corrosion on the outer surface after 80 hours in the smoke test.
In addition, the plastic product in the embodiment 1 has good light transmission performance, and the light transmission uniformity is more than 0.4; the radar wave can pass through smoothly. The plastic product of comparative example 1 had poor light transmission and radar waves could not pass through.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A film coating method for the surface of a vehicle-mounted plastic product is characterized by comprising the following steps: the method comprises the following steps:
pretreating the surface of the plastic substrate to remove static electricity and impurities on the surface of the plastic substrate;
transferring the first film coating material to the surface of the pretreated plastic substrate to form an adhesion layer;
curing the adhesion layer;
forming a metal coating on the surface of the adhesion layer by vacuum plating;
transferring a second film coating material to the surface of the metal coating to form a protective layer;
and curing the protective layer.
2. The plating method for the surface of the vehicle-mounted plastic product according to claim 1, wherein: the method for transferring the first film-coating material to the surface of the plastic substrate after pretreatment is as follows: spraying the first film coating material on the surface of the pretreated plastic substrate; the spraying conditions are as follows: the spraying pressure is 0.3 MPa-0.5 MPa, and the spraying speed is 85 mL/s-110 mL/s.
3. The plating method for the surface of the vehicle-mounted plastic product according to claim 1, wherein: the method for curing the adhesion layer comprises the following steps: the adopted power is 1500mJ/cm2~1700mJ/cm2The ultraviolet light cures the adhesive layer for 9 to 15 seconds.
4. The plating method for the surface of the vehicle-mounted plastic product according to claim 1, wherein: the vacuum plating is magnetron sputtering plating; the vacuum degree of the magnetron sputtering electroplating is 1.1 multiplied by 10-3Pa~1.5×10-3Pa, the electroplating time of the magnetron sputtering electroplating is 6-10 min.
5. The plating method for the surface of the vehicle-mounted plastic product according to claim 4, wherein: the target material of the magnetron sputtering electroplating is indium or pickaxe; the distance between the target and the adhesion layer is 60-80 cm.
6. The plating method for the surface of the vehicle-mounted plastic product according to claim 1, wherein: the method for transferring the second coating material to the surface of the metal coating comprises the following steps: spraying the second film coating material to the surface of the metal coating; the spraying conditions are as follows: the caliber of the spray gun is 1.2 mm-1.5 mm, and the spraying pressure is 0.2 MPa-0.5 MPa.
7. The coating method for the surface of the vehicle-mounted plastic product according to any one of claims 1 to 6, wherein: the temperature for curing the protective layer is 75-85 ℃, and the curing time is 60-90 min.
8. An on-board plastic product characterized by: the vehicle-mounted plastic product comprises a plastic substrate and a film layer arranged on the surface of the plastic substrate; the film layer is prepared by the film coating method for the surface of the vehicle-mounted plastic product according to any one of claims 1 to 7.
9. The vehicular plastic product of claim 8, wherein: the thickness of the adhesion layer is 15-35 μm.
10. The vehicular plastic product of claim 8, wherein: the thickness of the protective layer is 25-35 μm.
CN202010030613.5A 2020-01-13 2020-01-13 Film coating method for surface of vehicle-mounted plastic product and vehicle-mounted plastic product Pending CN111101106A (en)

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