Surface treatment method, equipment and coated product for polymer-based film

Abstract

The present invention discloses a method, equipment and coated product for surface treatment of a polymer base film, the treatment method includes providing a base film surface modification device at the discharge end of the polymer base film before coating, so as to form an active interface on the surface of the polymer base film that undergoes a chemical bond reaction with the coating material, the equipment includes an unwinding roller, a winding roller and a film layer deposition area, and an ultraviolet ray radiator is provided on one or both sides of the polymer base film between the film layer deposition area and the unwinding roller, the coated product includes a polymer base film, a reinforcing layer and a functional coating layer, the reinforcing layer strengthens the adhesion between the functional coating layer and the polymer base film, and is formed by chemically bonding the coating layer material to the active interface on the surface of the polymer base film. The present invention uses an ultraviolet ray radiator to irradiate the surface of the polymer base film to form an active interface and enhance the adhesion between the coating film and the polymer base film, so that the surface treatment of the polymer base film can be more easily realized, and the surface treatment process is pollution-free and highly efficient.

Description

[Technical field]

[0001] The present invention relates to the technical field of coatings, in particular to a surface treatment method, an apparatus and a coated product for polymeric base films. [Background technology]

[0002] At present, the most widely used method for further expanding the functionality and application field of polymer base films is to compound functional film layers on polymer base films. That is, a thin film is deposited on the surface of the polymer base film to form a composite material with functions such as blocking and conducting. One of the important properties of the coated product is that the film layer to be coated has good adhesion performance. Usually, the surface of the base film is modified by physical methods (plasma, corona discharge, etc.) and chemical methods (surface graft modification, etc.) to strengthen the adhesion of the coating layer.

[0003] However, among conventional modification methods, the modification method of performing plasma bombardment in a vacuum environment requires a relatively complicated equipment structure, and it is difficult to ensure long-term production operation due to the operation and maintenance of the plasma equipment. In the case of corona discharge treatment before coating, an additional process is required. In the case of surface graft modification, the additional process may cause contamination of the base film surface, and the equipment system is relatively more complicated.

[0004] It would be of value to address the above-mentioned shortcomings. Summary of the Invention [Problem to be solved by the invention]

[0005] In order to overcome the drawbacks of the prior art that the surface treatment of a polymer-based film is not easy and the system configuration is complicated, the present invention provides a method, an apparatus and a coated product for treating the surface of a polymer-based film. [Means for solving the problem]

[0006] The technical solution of the present invention is as follows:

[0007] The present invention provides a surface treatment method for a polymer base film, which is characterized by including providing a base film surface modification device at the discharge end of the polymer base film before coating, so as to form an active interface on the surface of the polymer base film that undergoes a chemical bonding reaction with a coating material.

[0008] The invention according to the above scheme is characterized in that it includes providing an ultraviolet ray radiator at the exit end of the polymeric base film so that oxygen-containing groups are induced to be introduced into the surface of the polymeric base film after irradiation.

[0009] The invention according to the above scheme is characterized in that it includes a trace gas distribution pipe line for conveying an oxygen-containing atmosphere to the surface of the polymer base film at the discharge end of the polymer base film before coating.

[0010] In another aspect, the present invention provides a surface treatment device for a polymer base film, comprising an unwinding roller, a winding roller, and a film layer deposition area located between the unwinding roller and the winding roller, in which a polymer base film unwound from the unwinding roller passes through the film layer deposition area and is then wound up on the winding roller, The present invention provides a surface treatment device for a polymer base film, characterized in that an ultraviolet radiation device is provided between the film layer deposition area and the unwinding roller, which irradiates one or both sides of the polymer base film to form an active interface on the surface.

[0011] The present invention according to the above proposal is characterized in that there is a positive correlation between the radiation intensity of the ultraviolet radiating device and the transport speed of the polymer base film.

[0012] The present invention according to the above proposal is characterized in that the distance from the polymer base film to the ultraviolet ray irradiating device and the transport speed of the polymer base film are negatively correlated.

[0013] The present invention relating to the above proposal is characterized in that a trace gas distribution pipe line is further provided between the ultraviolet radiation device and the unwinding roller, on one or both sides of the polymer base film, for transporting an oxygen-containing atmosphere to the surface of the polymer base film.

[0014] The present invention according to the above proposal is characterized in that it includes a functional coating layer deposition module in which a film layer deposition area is located on one or both sides of the polymer base film.

[0015] The present invention further provides a coated product comprising a polymer base film and a functional coating layer on the surface of the polymer base film, wherein a reinforcing layer is provided between the polymer base film and the functional coating layer to strengthen the adhesion between the functional coating layer and the polymer base film, and the reinforcing layer is formed by chemically bonding a coating layer material to an active interface on the surface of the polymer base film.

[0016] The present invention according to the above proposal is characterized in that a buffer layer is further provided between the polymer base film and the functional coating layer, and the reinforcement layer is located between the buffer layer and the polymer base film, and is formed by chemically bonding the material of the buffer layer to the active interface on the surface of the polymer base film.

[0017] The beneficial effect of the present invention according to the above scheme is that the present invention introduces an ultraviolet ray radiator into the vacuum chamber for coating, and the ultraviolet ray radiator irradiates the surface of the polymer base film to form an active interface, which can create the conditions for chemical bonding with the coating layer during the subsequent deposition process on the base film surface, and further increase the adhesion between the coating film and the polymer base film. There is no need to add a huge amount of modification equipment to the entire coating system, which makes it easier to realize the surface treatment of the polymer base film, and is a pollution-free and highly efficient surface treatment process. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a structural schematic diagram of Example 1 of the present invention. [Diagram 2] FIG. 2 is a structural schematic diagram of Example 2 of the present invention. [Diagram 3] FIG. 4 is a structural schematic diagram of Example 3 of the present invention. [Figure 4] FIG. 1 is a structural schematic diagram of Example 4 of the present invention. [Diagram 5] FIG. 11 is a structural schematic diagram of Example 5 of the present invention. [Figure 6] FIG. 11 is a structural schematic diagram of Example 6 of the present invention. [Figure 7] FIG. 11 is a structural schematic diagram of Example 7 of the present invention. [Figure 8] FIG. 11 is a structural schematic diagram of Example 8 of the present invention. [Figure 9] FIG. 11 is a structural schematic diagram of Example 9 of the present invention. [Figure 10] FIG. 2 is a schematic diagram of the structure of a coated product in one embodiment of the present invention. [Figure 11] FIG. 2 is a structural schematic diagram of a coated product in another specific embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The present invention will be further described below in combination with drawings and embodiments.

[0020] The present invention provides a method for surface treatment of a polymer base film in an easier manner in a vacuum coating environment, so that a structure capable of forming a chemical bond with a coating layer can be generated on the surface to be coated, thereby improving the adhesion ability of the coating layer. The purpose of surface modification of the polymer base film is achieved by providing a base film surface modification device at the discharge end of the polymer base film before coating, so as to form an active interface on the surface of the polymer base film that can undergo a chemical bond reaction with the coating material.

[0021] The surface modification device of the base film is an ultraviolet radiation device, that is, an ultraviolet radiation device is provided at the discharge end of the polymer base film so that oxygen-containing groups are induced to be introduced to the surface of the polymer base film after the water molecules, oxygen molecules, etc. on the surface of the polymer base film are irradiated. Specifically, the oxygen-containing groups can be induced to be introduced to the surface of the polymer base film by irradiating the surface of the polymer base film with an ultraviolet radiation device in the vacuum chamber of the vacuum winding coating equipment. Here, the oxygen-containing groups are oxygen-containing groups including single bond oxygen (COC, C-OH), carbonyl group (C=O), carboxyl group (COOH), etc., and the above oxygen-containing groups can provide an active interface for the deposition of the coating layer of the polymer base film in the subsequent process, and can also generate a chemical bond reaction between the coating material (e.g., metal) and the oxygen-containing group, which can build a chemical bond valence structure at the interface, and ultimately achieve the effect of increasing the adhesive strength at the interface between the coating film layer and the polymer base film.

[0022] In the subsequent coating process, the polymer base film with active interface enters the film layer deposition area, and the coating material in the film layer deposition area chemically bonds with the active interface to form a reinforcing layer, thereby enhancing the adhesion ability of the coating layer to the polymer base film surface. Specifically, the coating material deposited in the film layer deposition area can be a metal material, and the metal in the film layer deposition area chemically bonds with the active interface to form a metal oxide, thereby enhancing the adhesion ability of the coating layer to the polymer base film surface.

[0023] The metal material may be Ti and Ti alloy material, Al and Al alloy material, Cr and Cr alloy material, which have good buffer and adhesive properties. That is, the above metal material is deposited by evaporation, magnetron sputtering, etc. When highly active atomic or ionic materials are attached to the above base film surface, they are more likely to form components with similar chemical bonds such as TiOx, CrOx, aluminum oxide, etc. with the active interface of the polymer base film surface, thus enhancing the adhesion of the coating layer to the base film surface.

[0024] The material of the polymer base film may be PET (polyethylene terephthalate), PI (polyimide), PPS (polyphenylsulfide), PP (polypropylene), PE (polyethylene), PC (polycarbonate), PEN (polyethylene naphthalate), PS (polystyrene), PA (polyamide), PTFE (polytetrafluoroethylene), PES (ethylene vinyl acetate copolymer), PEI (polyetherimide), PEEK (polyether ether ketone), etc. The above method of the present invention has more prominent features for polymer base films with non-polar properties.

[0025] As the ultraviolet radiation device, an ultraviolet radiation tube lamp may be used. The ultraviolet radiation tube lamp may be a commercially available product having a conventional UVA wavelength band (wavelength 320-420 nm, also called long-wave black spot effect ultraviolet), UVB wavelength band (wavelength 275-320 nm, also called medium-wave red spot effect ultraviolet), UVC wavelength band (wavelength 200-275 nm, also called short-wave germicidal ultraviolet), or UVD wavelength band (wavelength 100-200 nm, also called vacuum ultraviolet). The ultraviolet light generated from the ultraviolet radiation device is absorbed by the polymer group of the polymer base film, the bond of the group is cleaved, and new groups in which oxygen is single- or double-bonded are generated by substances such as water molecules and oxygen molecules adsorbed on the surface of the group. By selecting an appropriate ultraviolet light, the bond of the cleaved oxygen molecule is excited to generate atomic oxygen, and ultimately, a modified base film surface having a highly active group or interface is formed in greater amount.

[0026] Furthermore, in order to generate more oxygen-containing groups on the surface of the base film, a trace gas distribution pipe line is provided at the discharge end of the polymer base film before coating to deliver oxygen-containing atmosphere to the surface of the polymer base film. The trace gas distribution pipe line is connected to a flow control device, and the precise flow control device realizes the delivery of oxygen-containing atmosphere through the gas distribution pipe line, and the introduction of the oxygen-containing atmosphere does not affect the subsequent deposition of thin films. In the specific realization process, the oxygen-containing atmosphere adopts a trace mixing method, such as a mixed atmosphere of Ar+ with a gas concentration of 99.5% and O2 with a gas concentration of 0.5%. An ozone source may be used instead of oxygen.

[0027] As shown in Figures 1 to 9, the present invention provides a surface treatment equipment for a polymer base film, and provides the hardware conditions required for the surface treatment of the base film by arranging ultraviolet lamp irradiation devices on both sides of the base film withdrawal position on the unwinding side of the raw film of the coating material in the vacuum chamber.

[0028] The surface treatment device for the polymer base film includes an unwinding roller 10, a winding roller 20, and a film layer deposition area located between the unwinding roller 10 and the winding roller 20, and the polymer base film 31 unwound from the unwinding roller passes through the film layer deposition area and is then wound up by the winding roller 20. The unwinding roller 10 realizes the unwinding of the polymer base film 31, the film layer deposition area realizes the surface coating of the polymer base film 31, and the winding roller realizes the winding of the coated product 30 after coating.

[0029] In order to ensure smooth film transport throughout the entire coating device and to save space inside the coating device, an unwinding pass roller 11 is provided between the unwinding roller 10 and the film layer deposition area, and the polymer base film 31 is wound around the unwinding pass roller 11 after being unwound before entering the film layer deposition area. Correspondingly, in order to ensure the flatness of the coated product 30 after winding, a winding flattening roller 21 is provided between the end of the film layer deposition area and the winding roller 20, and the coated product 30 after coating is completed is wound around the winding flattening roller 21 and then wound onto the winding roller 20.

[0030] In order to improve the adhesion between the coating film and the polymer base film, an ultraviolet radiation device is provided between the film layer deposition area and the unwinding roller of the present invention to irradiate one or both sides of the polymer base film, and when the polymer base film is unwound, the ultraviolet radiation device begins to operate to form an active interface on the surface of the polymer base film.

[0031] The ultraviolet ray emitting device is attached to a position adjusting device, and the position adjusting device adjusts the distance between the ultraviolet ray emitting device and the polymer base film, and further, the irradiation distance can be adjusted according to the transport speed of the polymer base film. Specifically, the distance from the polymer base film to the ultraviolet ray emitting device and the transport speed of the polymer base film are negatively correlated. In addition, the irradiation intensity of the ultraviolet ray emitting device can also be adjusted, and the irradiation intensity can be adjusted according to the transport speed of the polymer base film. Specifically, the radiation intensity of the ultraviolet ray emitting device and the transport speed of the polymer base film are positively correlated.

[0032] Generally, the range of the transport speed of the polymer base film is very wide, and the transport speed of a general polymer base film is 2m / min to 400m / min. In this case, the radiation intensity of the ultraviolet radiation device is 0.5mW / cm2 to 500mW / cm2, and the distance from the polymer base film to the ultraviolet radiation device is 1cm to 10cm.

[0033] The film layer deposition area forms a coating film on the surface of the polymer base film, and includes functional coating layer deposition modules located on one or both sides of the polymer base film. The functional coating layer deposition module on one side forms the coating on one side of the polymer base film, and the functional coating layer deposition module on both sides forms the coating on both sides of the polymer base film. The functional coating layer deposition module and the buffer layer deposition module each include a deposition cooling roller, a coating layer evaporation source, a flattening roller and a passing roller, the polymer base film is wound around the flattening roller, the deposition cooling roller and the passing roller in sequence, and the coating layer evaporation source is located on the outer side of the film conveying of the deposition cooling roller.

[0034] If necessary, the film layer deposition area further includes a buffer layer deposition module, which is located upstream of the functional coating layer deposition module along the film transport direction of the polymer base film, and coats a buffer layer on the surface of the polymer base film by the buffer layer deposition module, and then forms a functional coating layer by the subsequent functional coating layer deposition module, thereby realizing buffering and further strengthening between the functional coating layer and the surface of the polymer base film. Example 1

[0035] As shown in FIG. 1, in this embodiment, the ultraviolet radiation tube lamps of the ultraviolet radiation device are arranged on both sides of the polymer base film, and the irradiation intensity of the ultraviolet radiation tube lamps and their distance from the polymer base film are adjusted according to the transport speed of the polymer base film.

[0036] Specifically, this embodiment uses a PI base film as the substrate of the coating material, and the structure of the formed coated product can be regarded as the form of PI / reinforcement layer / functional layer. In addition, the transport speed of the polymer base film in this embodiment is 2m / min, and the UV radiation tube lamp uses a radiation intensity of 5mW / cm2 and a radiation distance of 4cm.

[0037] In addition, in this embodiment, coating is performed using a one-sided deposition method. That is, the functional coating layer deposition module includes a first deposition module 40, which includes a first deposition cooling roller 41, a first evaporation mechanism 42, a first deposition flattening roller 43, and a first deposition passing roller 44, and the first evaporation mechanism 42 is located below the first deposition cooling roller 41. The polymer base film is wound around the first deposition flattening roller 43, the first deposition cooling roller 41, and the first deposition passing roller 44 in order, and the deposition on one side is completed by the first evaporation mechanism 42.

[0038] The functional coating layer may be a metal film layer, a metal compound film layer, or the like. Example 2

[0039] As shown in FIG. 2, this embodiment is different from Example 1 in that coating is performed using a double-sided deposition method. That is, the functional coating layer deposition module includes a first deposition module 40 and a second deposition module 50. Specifically, the first deposition module 40 includes a first deposition cooling roller 41, a first evaporation mechanism 42, a first deposition flattening roller 43, and a first deposition passing roller 44, and the first evaporation mechanism 42 is located below the first deposition cooling roller 41. The second deposition module 50 includes a second deposition cooling roller 51, a second evaporation mechanism 52, a second deposition flattening roller 53, and a second deposition passing roller 54, and the second evaporation mechanism 52 is located below the second deposition cooling roller 51.

[0040] The polymer base film is wound around the first film-forming flattening roller 43, the first film-forming cooling roller 41, and the first film-forming passing roller 44 in this order, and deposition on one side is completed by the first evaporation mechanism 42. Then, the polymer base film is wound around the second film-forming flattening roller 53, the second film-forming cooling roller 51, and the second film-forming passing roller 54 in this order, and deposition on the other side is completed by the second evaporation mechanism 52. Example 3

[0041] As shown in FIG. 3, this embodiment differs from embodiment 2 in that the buffer layer deposition on both sides is first completed by a buffer layer deposition module before the coating of the functional layer is completed.

[0042] The buffer layer deposition module includes a first deposition module 40 and a second deposition module 50. The first deposition module 40 includes a first deposition cooling roller 41, a first evaporation mechanism 42, a first deposition flattening roller corresponding to the first deposition cooling roller 41, and a first deposition passing roller. The second deposition module 50 includes a second deposition cooling roller 51, a second evaporation mechanism 52, a second deposition flattening roller corresponding to the second deposition cooling roller 51, and a second deposition passing roller. The polymer base film is wound around the first deposition flattening roller, the first deposition cooling roller 41, and the first deposition passing roller in this order, and the deposition of the buffer layer on one side is completed by the first evaporation mechanism 42. Then, the polymer base film is wound around the second film-forming flattening roller, the second film-forming cooling roller 51, and the second film-forming passing roller in this order, and the deposition of the buffer layer on the other side is completed by the second evaporation mechanism 52.

[0043] The functional coating layer deposition module includes a third deposition module 60 and a fourth deposition module 70, the third deposition module 60 includes a third deposition cooling roller 61, a third evaporation mechanism 62, a third deposition flattening roller corresponding to the third deposition cooling roller 61, and a third deposition passing roller, and the fourth deposition module 70 includes a fourth deposition cooling roller 71, a fourth evaporation mechanism 72, a fourth deposition flattening roller corresponding to the fourth deposition cooling roller 71, and a fourth deposition passing roller. The polymer base film is wound around the third deposition flattening roller, the third deposition cooling roller 61, and the third deposition passing roller in this order, and the deposition of the functional coating layer on one side is completed by the third evaporation mechanism 62. The polymer base film is then wound around a fourth deposition flattening roller, a fourth deposition cooling roller 71, and a fourth deposition passing roller in this order, and the deposition of the functional coating layer on the other side is completed by a fourth evaporation mechanism 72.

[0044] In a specific implementation process, the buffer layer may be Ti and Ti alloys, Cr and Cr alloys, and the functional coating layer often uses a metal film layer, a metal compound film layer, etc., but in this embodiment, metal Ti is used as the buffer layer and metal Al is used as the functional coating, and the total thickness of the coating layer (including the buffer layer and the functional coating layer) after coating can be 150 nm. Example 4

[0045] 4, this embodiment differs from Example 1 in that a trace amount of oxygen-containing atmosphere is first introduced before irradiation by the ultraviolet emitting device 12. A trace amount of gas distribution pipe 13 is further provided between the ultraviolet emitting device 12 and the unwinding roller 10, and is disposed on one or both sides of the polymer base film 31 to deliver an oxygen-containing atmosphere to the surface of the polymer base film 31.

[0046] In this embodiment, coating is performed using a deposition method, and a trace amount of oxygen-containing atmosphere is introduced using a trace gas distribution pipe 13 to generate a reinforcement layer (e.g., aluminum oxide). By simply introducing a trace amount of oxygen-containing atmosphere, the oxygen-containing atmosphere already forms single-bonded oxygen or double-bonded oxygen groups, and since there is a certain distance from the position of the evaporation coating to the trace gas distribution pipe 13, the introduced oxygen-containing atmosphere hardly affects the evaporation coating. In addition, the oxygen-containing groups generated by the oxygen-containing atmosphere are all consumed early when chemically bonding with the metal to form an oxide layer, which is a reinforcement layer, so there is no effect on the subsequent formation of a functional coating layer. Example 5

[0047] As shown in FIG. 5, this embodiment differs from the second embodiment in that a trace gas distribution pipe 13 is further provided between the ultraviolet ray emitting device 12 and the unwinding roller 10. As shown in FIG. Example 6

[0048] As shown in FIG. 6, this embodiment differs from the third embodiment in that a trace gas distribution pipe 13 is further provided between the ultraviolet ray emitting device 12 and the unwinding roller 10. As shown in FIG. Example 7

[0049] 7, this embodiment differs from Example 4 in that the functional coating layer is coated by a sputter coating method. That is, a plurality of first targets 45 are arranged on the outer periphery of the first film-forming cooling roller 41, and sputter coating is performed via the first targets 45.

[0050] In this embodiment, the coating is performed by the sputter coating method, and in the sputter coating process, it is necessary to introduce a sputtering gas. In this embodiment, an oxygen-containing atmosphere is introduced to the film discharge end of the unwinding roller 10 using a trace gas distribution pipe 13, and the concentration value of the sputtering gas is much higher than that of the oxygen-containing atmosphere, so that a large amount of sputtering gas is diffused, and the oxygen-containing atmosphere does not diffuse to the position of sputter coating. In addition, there is a certain distance from the position of sputter coating to the trace gas distribution pipe, so the introduced oxygen-containing atmosphere does not affect the sputter coating. Example 8

[0051] As shown in Fig. 8, this embodiment differs from Example 5 in that the functional coating layer is coated by a sputter coating method. That is, a plurality of first targets 45 are arranged on the outer periphery of the first film-forming cooling roller 41, and sputter coating is performed via the first targets 45. A plurality of second targets 55 are arranged on the outer periphery of the second film-forming cooling roller 51, and sputter coating is performed on the other side of the polymer base film via the second targets 55. Example 9

[0052] As shown in FIG. 9, this embodiment differs from the sixth embodiment in that the buffer layer and the functional coating layer are coated by a sputter coating method. That is, a plurality of first targets 45 are arranged on the outer periphery of the first film-forming cooling roller 41, and one side of the polymer base film 31 is sputter-coated through the first targets 45 to form a buffer layer. A plurality of second targets 55 are arranged on the outer periphery of the second film-forming cooling roller 51, and the other side of the polymer base film is sputter-coated through the second targets 55 to form a buffer layer. A plurality of third targets 63 are arranged on the outer periphery of the third film-forming cooling roller 61, and one side of the polymer base film 31 is sputter-coated through the third targets 63 to form a functional coating layer. A plurality of fourth targets 73 are arranged on the outer periphery of the fourth film-forming cooling roller 71, and the other side of the polymer base film is sputter-coated through the fourth targets 73 to form a functional coating layer.

[0053] In the above embodiment, evaporation coating requires an evaporation mechanism, and sputtering coating requires a target and gas, such as argon gas, to be introduced. In addition, when coating is required on both sides of a polymer base film in one vacuum chamber, two deposition cooling rollers are used, and the same coating method is used at the positions of the two deposition cooling rollers. For example, both are evaporation coating, or both are sputter coating.

[0054] It should be noted that the above coating process is all carried out in a vacuum environment. When performing sputter coating, it is necessary to introduce sputtering gas. When adding a trace gas distribution line, the concentration of the introduced oxygen-containing atmosphere is much smaller than that of the sputter gas, and a lot of sputter gas is diffused, so the oxygen-containing atmosphere does not diffuse to the position of sputter coating. In addition, there is a certain distance from the position of sputter coating to the trace gas distribution line, so the introduced oxygen-containing atmosphere does not affect the sputter coating.

[0055] As shown in Figures 10 and 11, the present invention further provides a coated product with an adhesive strength of 600 N / m, which is improved by more than 100% compared to before the improvement. The coated product includes a polymer base film and a functional coating layer on the surface of the polymer base film, and a reinforcing layer is provided between the polymer base film and the functional coating layer to strengthen the adhesive strength between the functional coating layer and the polymer base film, and the reinforcing layer is formed by chemically bonding the coating layer material to the active interface on the surface of the polymer base film.

[0056] Specifically, in FIG. 10, the coated product 30 includes a polymer base film 31, an aluminum layer 33 as a functional coating layer, and an aluminum oxide layer 32 between the polymer base film 31 and the aluminum layer 33. The aluminum oxide layer 32 is a reinforcement layer formed by chemically bonding aluminum metal, which is the raw material of the aluminum layer 33, with the active interface on the surface of the polymer base film 31. The coated product is formed by directly coating aluminum. When the metal aluminum material contacts the surface of the polymer base film 31, the aluminum oxide layer 32 is formed first, and then the aluminum layer 33 is formed. The thickness of the functional coating layer (aluminum layer 33) is controlled between 200 nm and 1500 nm according to the needs of the product, and the thickness of the reinforcement layer (aluminum layer 33) is 10 nm or less. When a trace gas distribution pipe as shown in FIG. 4 or FIG. 7 is added to introduce an oxygen-containing atmosphere, the aluminum oxide layer becomes thicker (more than 10 nm and less than 25 nm), and the adhesion becomes stronger.

[0057] In a preferred embodiment shown in FIG. 11, a buffer layer is further provided between the polymer base film and the functional coating layer, and the reinforcement layer is located between the buffer layer and the polymer base film, and is formed by chemically bonding the material of the buffer layer to the active interface on the surface of the polymer base film.

[0058] Specifically, in FIG. 11, the coated product 30 includes a polymer base film 31 and an aluminum layer 33 as a functional coating layer, and between the polymer base film 31 and the aluminum layer 33 are provided a titanium oxide layer 34 (TiOx layer) as a reinforcing layer and a titanium layer 35 as a buffer layer, and the reinforcing layer is formed by chemically bonding titanium, which is the raw material of the buffer layer, with the active interface on the surface of the polymer base film 31.

[0059] Before forming the functional coating layer (aluminum layer 33), first, a titanium oxide layer 34 is formed, then a titanium layer 35 is formed, and finally, an aluminum layer 33 is formed. When an oxygen-containing atmosphere is introduced by adding a trace gas distribution pipe line, the titanium oxide layer 34 becomes thicker and has stronger adhesion. In one embodiment, the thickness of the titanium oxide layer 35 when an oxygen-containing atmosphere is introduced is within 25 nm (usually within 10 nm when no trace oxygen-containing atmosphere is introduced), the thickness of the titanium layer 35 is 200 nm to 800 nm, and the thickness of the aluminum layer 33 is 200 nm to 800 nm.

[0060] In the above specific embodiment, the functional coating layer is an aluminum layer, which can be formed by evaporation coating or sputter coating.The functional coating layer can be a copper layer, which can also be formed by evaporation coating or sputter coating.

[0061] The present invention further provides comparative experiments.

[0062] The following description will be given taking as an example Example 1, which is a basic example. First, a coated sample AA1 is obtained without operating the ultraviolet ray irradiator, and a coated sample AA2 with a reinforcing layer is obtained by operating the ultraviolet ray irradiator.

[0063] 1. Compare the adhesive performance of coated sample AA1 and coated sample AA2.

[0064] A 20mm wide adhesive tape that requires 1000N / m of force to peel was attached to the surface of coated sample AA1 and coated sample AA2, and then the adhesive strength of the coating layer was tested by pulling it at 180° using a tensile tester at a speed of 50mm / min. As a result of the test, the adhesive strength of the coated sample AA1, which was not exposed to UV rays, reached 287N / m, and the adhesive strength of the coated sample AA2 reached 749N / m.

[0065] The adhesion performance of the coated samples reinforced with the method of the present invention was significantly improved.

[0066] 2. Compare the adhesive performance of coated sample AA1 and coated sample AA2.

[0067] The present invention further simulates the electrolytic environment for lithium-ion batteries, and tests the adhesion performance of the coated sample AA1 and the coated sample AA2 after immersing them in chemicals respectively.

[0068] Even after immersing in a normal lithium-ion battery electrolyte, sealing, and baking at 85°C for 72 hours, the coated samples AA1 and AA2 maintained good adhesion performance, with adhesive strengths of 213N / m for coated sample AA1 and 688N / m for coated sample AA2, respectively, which were 74% and 92% of the original state, respectively.

[0069] Thus, the coated sample AA2, which was enhanced by the method of the present invention, retained the advantage of good adhesion performance.

[0070] 3. Compare the mechanical strength of coated sample AA1 and coated sample AA2.

[0071] Taking a 10 mm wide sample as an example, when the tensile strength of the sample is measured at a tensile speed of 50 mm / min, the tensile strength of the coated sample AA1 can reach 195 MPa, and the tensile strength of the coated sample AA2 can reach 231 MPa.

[0072] The present invention makes it possible to realize a pollution-free surface treatment of a polymer base film by the above-mentioned surface treatment method and equipment of the polymer base film, and the adhesion performance is improved by more than twice as much as that of a thin film formed by directly depositing a coating layer without conventional surface treatment, and the metal oxide component as the reinforcing layer can function to realize the passivation of the interface by forming a reinforcing layer by chemical bonding. The deposited thin film material has better chemical resistance and significantly improves the mechanical strength (tensile strength).

[0073] It should be understood that those skilled in the art may make improvements or modifications based on the above description, and all such improvements and modifications are intended to fall within the scope of the claims appended to the present invention.

[0074] Although the present invention has been described above by way of example with reference to the accompanying drawings, it is clear that the realization of the present invention is not limited to the above manner, and various modifications using the methods, concepts and technical solutions of the present invention, or direct application of the concepts and technical solutions of the present invention to other cases without modifications, are all within the protection scope of the present invention. [Explanation of symbols]

[0075] 10 Unwinding roller 11 Unwinding passing roller 12 Ultraviolet radiation device 13 Trace gas distribution pipe 20 Winding roller 21 Winding flattening roller 30 Coated products 31 Polymer-based film 32 Aluminum oxide layer 33 Aluminum layer 34 Titanium oxide layer 35 Titanium layer 40 First deposition module 41 First coating cooling roller 42 First Evaporation Mechanism 43 First coating flattening roller 44 First deposition passing roller 45 First Target 50 Second deposition module 51 Second coating cooling roller 52 Second Evaporation Mechanism 53 Second coating flattening roller 54 Second film-forming passing roller 55 Second Target 60 Third deposition module 61 3rd Coating Cooling Roller 62 The third evaporation mechanism 63 The Third Target 70 4th deposition module 71 4th Coating Cooling Roller 72 The fourth evaporation mechanism 73 The Fourth Target

Claims

1. A surface treatment method for a polymer base film, comprising the steps of: The method includes providing a base film surface modification device at a discharge end of the polymer base film before coating, so as to form an active interface on the surface of the polymer base film that undergoes a chemical bonding reaction with the coating material. A surface treatment method for a polymer base film comprising the steps of:

2. and providing an ultraviolet radiation device at the exit end of the polymeric base film so that oxygen-containing groups are induced to be introduced into the surface of the polymeric base film after irradiation.

2. The method for treating the surface of a polymer base film according to claim 1.

3. and providing a trace gas distribution line at the discharge end of the polymeric base film prior to coating for conveying an oxygen-containing atmosphere to the surface of the polymeric base film.

2. The method for treating the surface of a polymer base film according to claim 1.

4. A surface treatment device for a polymer base film, comprising an unwinding roller, a winding roller, and a film layer deposition area located between the unwinding roller and the winding roller, wherein the polymer base film unwound from the unwinding roller passes through the film layer deposition area and is then wound up on the winding roller, Between the film layer deposition area and the unwinding roller, an ultraviolet ray irradiator is provided for irradiating one or both sides of the polymer base film to form an active interface on the surface. A surface treatment device for polymer-based films.

5. The radiation intensity of the ultraviolet radiation device and the transport speed of the polymer base film are positively correlated.

5. The surface treatment device for a polymer-based film according to claim 4.

6. The distance from the polymer base film to the ultraviolet ray irradiation device and the transport speed of the polymer base film are negatively correlated.

5. The surface treatment device for a polymer-based film according to claim 4.

7. Between the ultraviolet ray irradiator and the unwinding roller, a trace gas distribution pipe line is further provided, which is disposed on one or both sides of the polymer base film and delivers an oxygen-containing atmosphere to the surface of the polymer base film.

5. The surface treatment device for a polymer-based film according to claim 4.

8. The film layer deposition area includes a functional coating layer deposition module located on one or both sides of the polymer base film.

5. The surface treatment device for a polymer-based film according to claim 4.

9. A coated product comprising a polymer base film and a functional coating layer on a surface of the polymer base film, A reinforcing layer is provided between the polymer base film and the functional coating layer to enhance adhesion between the functional coating layer and the polymer base film; The reinforcing layer is formed by chemically bonding the coating layer material to the active interface on the surface of the polymer base film. A coated product characterized by:

10. A buffer layer is further provided between the polymer base film and the functional coating layer, and the reinforcement layer is located between the buffer layer and the polymer base film, and is formed by chemically bonding the material of the buffer layer to the active interface on the surface of the polymer base film.

10. The coated product according to claim 9.

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