Metal film, method of making and use thereof

Abstract

The application discloses a metal film and a preparation method and application thereof. The metal film comprises a base film; a metal layer, a first adhesive layer and a resin film are sequentially arranged on one side of the base film; and a coloring layer is arranged on the other side of the base film. The metal film has strong metal texture, high glossiness and stable uniformity of the glossiness, and can be used in the field of household appliance decoration to break the traditional appearance of the household appliance glass panel, so that the appearance of the household appliance is further improved. The preparation method of the metal film is simple, and the manufacturing process is diversified; the metal film can be printed in multiple colors and patterns, and various natural texture patterns can be attached on the inner and outer appearances of the glass.

Description

Technical Field

[0001] This invention relates to a metal film, its preparation method, and its application. Background Technology

[0002] Home appliances have become an indispensable part of people's lives. To cater to the diverse aesthetic needs of different customers, home appliance developers have produced various decorative films and functionalities for glass panels, resulting in glass panels with different effects. Currently, most manufacturers of home appliance glass panels use a glass screen printing production method. This method produces glass with low metallic luster and poor uniformity in appearance.

[0003] Currently, the scrap rate for screen-printed glass panels used in domestic home appliances is very high, with relatively large color deviations, low metallic luster, and poor appearance uniformity. The basic principle of screen printing is: ink passes through the mesh openings of a screen printing plate in the image areas, while ink does not pass through the mesh openings in the non-image areas. During printing, ink is poured onto one end of the screen printing plate, and a squeegee applies pressure to the ink-covered areas while moving towards the other end of the plate. The screen printing equipment consists of a screen printing machine and the sheet material. Multiple screen printing processes result in incomplete edge printing and poor printing uniformity. The resulting metallic luster is relatively dull and poor.

[0004] The above problems urgently need to be addressed. Summary of the Invention

[0005] The technical problem this invention aims to solve is to overcome the shortcomings of existing metal films, such as poor metallic gloss and uneven uniformity, and to provide a metal film, its preparation method, and its applications. The metal film of this invention has a strong metallic texture, high gloss, and stable gloss uniformity. Its application in the field of home appliance decoration can break away from the traditional appearance of home appliance glass panels, elevating the aesthetics of home appliances to a new level. The preparation method of the metal film of this invention is simple and the manufacturing process is versatile, allowing for multi-color and multi-pattern printing, and also enabling the lamination of various natural textures and patterns onto the inner and outer surfaces of glass.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This invention provides a metal film comprising a base film;

[0008] A metal layer, a first adhesive layer, and a resin film are sequentially stacked on one side of the base film;

[0009] A coloring layer is stacked on the other side of the base film.

[0010] In this invention, the thickness of the base film can be 30-50 μm, preferably 40-50 μm.

[0011] In the present application, the metal layer can have a thickness of 200-1000 nm, preferably 200-500 nm, such as 300 nm or 400 nm, more preferably 400-500 nm.

[0012] In the present application, after the metal layer is laminated to one side of the base film, an oxygen barrier coating is preferably laminated.

[0013] The oxygen barrier coating can have a thickness of 1-10 μm, preferably 1-5 μm, such as 2 μm, more preferably 3-5 μm, such as 4 μm.

[0014] The oxygen barrier coating can comprise a material conventionally used to form an oxygen barrier coating, such as polyurethane and / or epoxy resin, preferably polyurethane or epoxy resin.

[0015] In the present application, the first adhesive layer can have a thickness of 5-30 μm, preferably 10-15 μm, such as 12 μm.

[0016] In the present application, the resin film can have a thickness of 20-80 μm, preferably 25-50 μm, such as 30 μm or 40 μm.

[0017] In the present application, the coloring layer can have a thickness of 1-8 μm, preferably 2-5 μm, such as 4 μm.

[0018] In the present application, the base film can be a polyester film, preferably a PET film.

[0019] In the present application, the base film can be an opaque base film or a transparent base film, preferably a transparent base film.

[0020] In the present application, the base film can be a biaxially stretched film.

[0021] In the present application, the base film can be obtained by physical drawing or UV imprinting.

[0022] In some preferred embodiments of the present application, the base film is a transparent PET film.

[0023] In some preferred embodiments of the present application, the base film is a transparent PET biaxially stretched film (i.e. a PET drawn film).

[0024] In the present application, the base film can have a haze of 0.2-3.0, preferably 0.5-2.0, such as 0.8-1.0 or 1.5-2.0.

[0025] In the present application, the base film can have a light transmittance of 70-97%, preferably 80-97%, such as 80-85% or 90-95%.

[0026] In the present application, the metal layer can be a conventional metal layer in the art, preferably an aluminum plating layer.

[0027] In the present application, the purity of aluminum in the aluminum plating layer is generally 99%.

[0028] In the present application, the thickness of the aluminum plating layer can be 200-800 nm, preferably 300-500 nm, for example 400 nm.

[0029] In the present application, the components of the first adhesive layer can be conventional in the art, for example, acrylic resin.

[0030] In the present application, when the components of the first adhesive layer are acrylic resin, the adhesive layer is an acrylic pressure-sensitive adhesive. Pressure-sensitive adhesive, commonly known as adhesive, is a kind of adhesive with sensitivity to pressure.

[0031] In the present application, the resin film can be a polyester film, preferably a PET film.

[0032] In the present application, the resin film can be a biaxially stretched resin film.

[0033] In the present application, the resin film can be a colored resin film or a transparent resin film, preferably a colored resin film. The color of the colored resin film is preferably black.

[0034] In some preferred embodiments of the present application, the resin film is a black biaxially stretched PET film (i.e. black PET drawn film).

[0035] In the present application, the haze of the resin film can be 0.2-3.0, preferably 0.5-2.0, for example 0.8-1 or 1.5-2.0.

[0036] In the present application, the light transmittance of the resin film can be 70-97%, preferably 80-97%, for example 80-85% or 90-95%.

[0037] In the present application, the side of the base film on which the colored layer is stacked is the side that is attached to the glass.

[0038] In the present application, the components of the colored layer can be one or more of acrylic ink, polyurethane ink and phenolic resin ink, for example acrylic ink, polyurethane ink or phenolic resin ink, preferably polyurethane ink.

[0039] In the present application, preferably, the other side of the base film comprises the colored layer, the second adhesive layer and the release film stacked in sequence.

[0040] In the present application, the components of the second adhesive layer can be conventional in the art, for example, acrylic resin.

[0041] When the component of the second adhesive layer is acrylic resin, the adhesive layer is an acrylic pressure-sensitive adhesive. Pressure-sensitive adhesive, commonly known as adhesive, is a kind of adhesive with sensitivity to pressure.

[0042] The thickness of the second adhesive layer can be 5-30 μm, preferably 10-20 μm, for example 12 μm, 15 μm or 18 μm.

[0043] The release film can be a polyester release film, preferably a PET release film. PET release film is a commonly used material for heat transfer printing, which is a PET film coated with silicone oil, also known as silicone oil film.

[0044] The release film can be a colored release film or a transparent release film, preferably a transparent release film.

[0045] The thickness of the release film can be 20-80 μm, preferably 25-50 μm.

[0046] In the present application, the metal film is generally used without the release film.

[0047] In the present application, the light transmittance of the metal film can be 3-24%, preferably 3%-18%, for example 3-4% or 10-12%.

[0048] In some preferred embodiments of the present application, the base film, resin film and release film in the metal film are made of the same material, which is PET film.

[0049] In some preferred embodiments of the present application, the coloring layer and the resin film in the metal film are the same color, which is black.

[0050] The present application also provides a preparation method of a metal film, which comprises the following steps:

[0051] S1, corona treatment is performed on one side of the base film;

[0052] S2, metal is plated on the corona-treated side of the base film to obtain a metal layer;

[0053] S3, a coloring layer is printed on the other side of the base film;

[0054] S4, a first adhesive layer is coated on the metal layer to obtain a composite resin film.

[0055] In S1, the base film is as described above.

[0056] In S1, the power of the corona treatment can be a conventional power in the art, for example 2*1.2KW.

[0057] In S1, the speed of the equipment for the corona treatment can be 40-100 m / min, preferably 65-75 m / min, for example 70 m / min.

[0058] In S1, the equipment for the corona treatment can be a conventional corona equipment in the art, for example a corona machine.

[0059] In S2, the metal layer is as described above.

[0060] In S2, when the metal layer is an aluminum plating layer, the aluminum plating layer is preferably obtained by a vacuum aluminum plating process, for example by evaporating an aluminum wire into gaseous aluminum molecules and depositing the gaseous aluminum molecules onto the surface of the base film. The aluminum wire is preferably a pure aluminum wire with a purity of 99%. The temperature of the evaporation is preferably 1100-1200 °C.

[0061] In S2, when the metal layer is an aluminum plating layer, the equipment for the preparation of the aluminum plating layer is preferably a high vacuum winding plating film equipment of type PRO-M2100 from Leybold, Germany.

[0062] In S2, when the metal layer is an aluminum plating layer, the speed of the equipment for the preparation of the aluminum plating layer is preferably 500 m / min.

[0063] After the metal layer is prepared in S2, an oxygen barrier coating is preferably applied on the metal layer. After the oxygen barrier coating is applied on the metal layer, in S4, a first adhesive layer composite resin film is applied on the oxygen barrier coating.

[0064] In S4, the oxygen barrier coating is as described above.

[0065] In S4, the method of the application can be a conventional method in the art.

[0066] In S4, the equipment for the application can be a conventional equipment in the art, for example a coating equipment of type XTB1650-22.

[0067] In S4, the speed of the application can be 40-100 m / min, preferably 60-80 m / min.

[0068] In S3, the color layer is as described above.

[0069] In S3, the method of the printing is preferably intaglio printing.

[0070] In S3, the equipment for the intaglio printing is preferably an intaglio printing equipment of type FR400EL.

[0071] In S3, the speed of the equipment for the printing can be 40-50 m / min, preferably 35-45 m / min.

[0072] Preferably, the S3 further comprises the step of coating the colored layer with the second adhesive layer and the synchronous composite release film.

[0073] The second adhesive layer is as described above.

[0074] The release film is as described above.

[0075] The second adhesive layer is preferably combined with the release film by slit coating.

[0076] The running speed of the synchronous combination is preferably 15-20 m / min.

[0077] The first adhesive layer in S4 is as described above.

[0078] The resin film in S4 is as described above.

[0079] The first adhesive layer in S4 is preferably combined with the resin film by slit coating.

[0080] The running speed of the combination in S4 is preferably 15-20 m / min.

[0081] In the present application, the order of the above steps S1-S4 is not particularly limited and can be adjusted according to actual needs, for example, the order of S3 and S4 can be reversed.

[0082] In some preferred embodiments of the present application, the method for preparing the metal film comprises the following steps:

[0083] S1, corona treatment is performed on one side of the base film;

[0084] S2, metal plating is performed on the corona-treated side of the base film to obtain a metal layer;

[0085] S3, a colored layer is printed on the other side of the base film;

[0086] S4, a first adhesive layer is coated on the antioxidant coating layer to combine with the resin film, and the process is completed.

[0087] In S1, the thickness of the base film is 40-50 μm; the base film is a transparent PET biaxially stretched film; the haze of the base film is 0.5-2.0; and the light transmittance of the base film is 80-97%.

[0088] In S2, the metal layer is an aluminum plating layer; the thickness of the aluminum plating layer is 400-500 nm; and the aluminum plating layer is obtained by vacuum aluminum plating process.

[0089] After the metal layer is obtained by S2, an antioxidant coating layer is preferably coated on the metal layer; the thickness of the antioxidant coating layer is 3-5 μm; and the antioxidant coating layer is composed of polyurethane or epoxy resin.

[0090] In S3, the thickness of the coloring layer is 2-5 μm; the component of the coloring layer is polyurethane ink; and S3 further comprises the step of coating the coloring layer with the second adhesive layer and the synchronous composite release film.

[0091] In some preferred embodiments of the present application, the preparation method of the metal film comprises the following steps:

[0092] S1, performing corona treatment on one side of the base film;

[0093] S2, plating metal on the corona-treated side of the base film to obtain a metal layer;

[0094] S3, printing a coloring layer on the other side of the base film;

[0095] S4, coating the first adhesive layer and the composite resin film on the antioxidant coating layer, and the process is completed;

[0096] In S1, the thickness of the base film is 40-50 μm; the base film is a transparent PET biaxially stretched film; the haze of the base film is 0.5-2.0; the light transmittance of the base film is 80-97%; and the running speed of the corona treatment equipment is 65-75 m / min;

[0097] In S2, the metal layer is an aluminum plating layer; the thickness of the aluminum plating layer is 400-500 nm; the aluminum plating layer is obtained by vacuum aluminum plating process; the equipment for preparing the aluminum plating layer is a German Leybold PRO-M2100 type high vacuum winding plating film equipment; and the running speed of the equipment for preparing the aluminum plating layer is 500 m / min;

[0098] After the metal layer is obtained through S2, an antioxidant coating layer is preferably coated on the metal layer; the thickness of the antioxidant coating layer is 3-5 μm; the component of the antioxidant coating layer is polyurethane or epoxy resin; and the running speed of the coating process is 60-80 m / min;

[0099] In S3, the thickness of the coloring layer is 2-5 μm; and the running speed of the printing equipment is 35-45 m / min;

[0100] In S3, the component of the coloring layer is polyurethane ink; and S3 further comprises the step of coating the coloring layer with the second adhesive layer and the synchronous composite release film.

[0101] In some preferred embodiments of the present application, the preparation method of the metal film comprises the following steps:

[0102] (1) selecting a transparent PET drawn film, wherein the thickness of the drawn film is 50 μm, the haze is 1.5-2.0, and the light transmittance is 80-85%;

[0103] (2) the transparent PET drawn film is subjected to corona treatment on one side, the running speed of the corona treatment equipment is 70 m / min, and the corona treatment power is 2*1.2 KW;

[0104] (3) the PET drawn film is subjected to aluminum plating on the corona treated side, the thickness of the aluminum plating layer is 500 nm, and the running speed of the aluminum plating equipment is 500 m / min; the equipment for preparing the aluminum plating layer is a high vacuum winding film plating equipment of PRO-M2100 type from Germany Leibolt;

[0105] (4) a DB1415 epoxy resin antioxidant coating is coated on the aluminum plated side, the running speed of the coating equipment is 80 m / min, and the thickness of the coating is 4 microns;

[0106] (5) the other side of the transparent PET drawn film is subjected to ink printing coloring (the coloring layer is composed of polyurethane ink), the running speed is 40 m / min, and the thickness of the ink layer is 4 microns.

[0107] (6) the ink printed side is coated with acrylic pressure sensitive adhesive, and a release film is simultaneously compounded, the thickness of the release film is 25 microns, the thickness of the pressure sensitive adhesive is 10 microns, and the running speed is 15 m / min.

[0108] (7) finally, the antioxidant coating side is coated with pressure sensitive adhesive to compound a black PET film, the thickness of the black PET is 50 microns, the thickness of the pressure sensitive adhesive is 10 microns, and the compounding running speed is 15 m / min.

[0109] The application further provides a metal film prepared by the preparation method.

[0110] The application further provides application of the metal film as a decorative material in the fields of building, household appliance, decoration and the like.

[0111] In the application, preferably, the metal film can be used as a household appliance metal film, and the metal film is attached to a household appliance glass during use.

[0112] In the application, the "first" and "second" only distinguish the adhesive layers on the two sides of the base film, and have no special meaning.

[0113] On the basis of common sense in the art, the above preferred conditions can be combined at will, and each preferred example of the application is obtained.

[0114] The reagents and raw materials used in the application are commercially available.

[0115] The positive progress effect of the application is that:

[0116] 1. the metal film has strong metal texture, high gloss and stable uniformity of gloss,

[0117] 2、In some embodiments of the present application, the uniformity error value of the glossiness of the prepared metal film can be controlled at about 1.0% as a whole.

[0118] 3、The preparation method of the metal film of the present application is simple, and the production process is diversified, various color and multi-color printing can be printed, and various natural texture patterns can be adhered on the inner and outer surfaces of the glass.

[0119] 4、The metal film of the present application can be widely used as a decorative material in the fields of building, household appliances, decoration, etc., especially in the field of household appliance decoration, which can break the traditional appearance of household appliance glass panel and make the appearance of household appliance reach a new level. BRIEF DESCRIPTION OF DRAWINGS

[0120] Figure 1 The structure diagram of the metal film prepared in Example 1 of the present application.

[0121] The reference signs are as follows:

[0122] Release film 1

[0123] Second adhesive layer 2

[0124] Coloring layer 3

[0125] Base film 4

[0126] Metal layer 5

[0127] Antioxidant coating 6

[0128] First adhesive layer 7

[0129] Resin film 8 DETAILED DESCRIPTION

[0130] The present application will be further described by way of examples, but the present application is not limited in the scope of the examples. The experimental methods in the following examples without specific conditions are selected according to conventional methods and conditions, or according to the product instructions.

[0131] The transparent PET drawn film, black PET film and transparent PET release film in the examples of the present application are all conventional products in the art; wherein the physicochemical properties of the transparent PET drawn film, black PET film and transparent PET release film meet the qualified product indicators of the People's Republic of China National Standard GB / T 16958-2008 (Biaxially Oriented Polyester Film for Packaging).

[0132] The manufacturer of the antioxidant coating is Hefei Linkbang Nanotechnology, model: DB1415 epoxy resin antioxidant coating.

[0133] The manufacturer of the acrylic pressure-sensitive adhesive is Hangzhou Hantai Chemical Co., Ltd., model: HT-550.

[0134] The manufacturer of the transparent PET drawn film, the black PET film and the transparent PET release film is Suzhou Simi Yang Electronic Material Co., Ltd.

[0135] Aluminum wire, Foshan Zhemai Vacuum Technology Co., Ltd.

[0136] Polyurethane ink: manufacturer: DIC Ink Co., Ltd. of Japan, model: FZ6600.

[0137] The coating equipment in the embodiment of the application is imported from Korea (manufacturer: PRINPIA MACHINERY Co., Ltd. of Korea, model: XTB1650-22).

[0138] In the following examples, printing is performed by using the intaglio printing method, and the intaglio printing equipment is FR400ELS of Shaanxi Beiren Printing Machinery Co., Ltd.

[0139] Vacuum aluminum plating equipment: high vacuum winding film plating equipment of PRO-M2100 type of Liebao of Germany.

[0140] The manufacturer of the transparent PET drawn film is SKC Group of Korea, and the model is FILM SH82 PET.

[0141] The online film plating thickness measuring device is an online measuring device for measuring the thickness change of the micro-coating layer of an aluminum plated film, as described in Chinese Patent (200820055437.5), and an online infrared transmission measuring system, as described in the software with the software copyright registration number 2008SR36733.

[0142] Example 1

[0143] (1) Select a transparent PET drawn film, the thickness of the drawn film is 50 μm, the haze is 1.5-2.0, and the light transmittance is 80-85%.

[0144] (2) Perform corona treatment on one side of the transparent PET drawn film, the running speed of the corona equipment is 70 m / min, and the corona power is 2*1.2 KW.

[0145] (3) Perform aluminum plating on the corona treated side of the PET drawn film, the thickness of the aluminum plating layer is 500 nm, and the running speed of the aluminum plating equipment is 500 m / min.

[0146] (4) Apply an anti-oxidation coating layer on the aluminum plated side, the running speed of the coating equipment is 80 m / min, and the thickness of the coating layer is 4 μm.

[0147] (5) Perform ink printing coloring on the other side of the transparent PET drawn film, the running speed is 40 m / min, and the thickness of the ink layer is 4 μm.

[0148] (6) On the ink printed surface, pressure sensitive adhesive is coated, and the pressure sensitive adhesive is simultaneously compounded with release film, the thickness of the release film is 25 μm, the thickness of the pressure sensitive adhesive is 10 μm, and the running speed is 15 m / min.

[0149] (7) Finally, on the surface of the antioxidant coating, pressure sensitive adhesive is coated to compound with black PET, the thickness of the black PET is 50 um, the thickness of the pressure sensitive adhesive is 10 μm, and the compounding running speed is 15 m / min.

[0150] Example 2

[0151] (1) A transparent PET drawn film is selected, the thickness of the drawn film is 50 μm, the haze is 0.8-1.0, and the light transmittance is 90-95%.

[0152] (2) One side of the transparent PET drawn film is subjected to corona treatment, the running speed of the corona equipment is 70 m / min, and the corona power is 2*1.2 KW.

[0153] (3) Aluminum plating is performed on the corona treated surface of the PET drawn film, the thickness of the aluminum plating layer is 400 nm, and the running speed of the aluminum plating equipment is 500 m / min.

[0154] (4) An antioxidant coating is coated on the aluminum plated surface, the running speed of the coating equipment is 80 m / min, and the thickness of the coating is 4 μm.

[0155] (5) The other side of the transparent PET drawn film is subjected to ink printing coloring, the running speed is 40 m / min, and the thickness of the ink layer is 4 μm.

[0156] (6) On the ink printed surface, pressure sensitive adhesive is coated, and the pressure sensitive adhesive is simultaneously compounded with release film, the thickness of the release film is 25 μm, the thickness of the pressure sensitive adhesive is 15 μm, and the compounding running speed is 15 m / min.

[0157] (7) Finally, on the surface of the antioxidant coating, pressure sensitive adhesive is coated to compound with black PET, the thickness of the black PET is 50 um, the thickness of the pressure sensitive adhesive is 20 μm, and the compounding running speed is 15 m / min.

[0158] Example 3

[0159] (1) A transparent PET drawn film is selected, the thickness of the drawn film is 50 μm, the haze is 1.5-2.0, and the light transmittance is 80-85%.

[0160] (2) One side of the transparent PET drawn film is subjected to corona treatment, the running speed of the corona equipment is 70 m / min, and the corona power is 2*1.2 KW.

[0161] (3) Aluminum plating is performed on the corona treated surface of the transparent PET drawn film, the thickness of the aluminum layer is 400 nm, and the running speed of the aluminum plating equipment is 500 m / min.

[0162] (4) On the aluminum-plated surface, an antioxidant coating layer was coated at a coating equipment running speed of 80 m / min, and the coating layer thickness was 4 μm.

[0163] (5) On the other surface of the transparent PET drawn film, ink printing coloring was performed at a running speed of 40 m / min, and the ink layer thickness was 4 μm.

[0164] (6) On the ink printing surface, pressure-sensitive adhesive was coated, and a release film was simultaneously compounded, the release film thickness was 25 μm, the pressure-sensitive adhesive thickness was 15 μm, and the running speed was 15 m / min.

[0165] (7) Finally, pressure-sensitive adhesive was coated on the antioxidant coating layer surface to compound black PET, the black PET thickness was 50 μm, the pressure-sensitive adhesive thickness was 10 μm, and the compounding running speed was 15 m / min.

[0166] The structure of the metal film prepared in Example 1 is shown in Figure 1 .

[0167] Example 4

[0168] (1) A transparent PET drawn film was selected, the drawn film thickness was 50 μm, the haze was 0.8-1, and the light transmittance was 90-95%.

[0169] (2) The transparent PET drawn film was subjected to corona treatment on one surface, the corona equipment running speed was 70 m / min, and the corona power was 2*1.2 KW.

[0170] (3) Aluminum plating was performed on the corona-treated surface of the transparent PET drawn film, the aluminum layer thickness was 400 nm, and the aluminum plating equipment running speed was 500 m / min.

[0171] (4) On the aluminum-plated surface, an antioxidant coating layer was coated at a coating equipment running speed of 80 m / min, and the coating layer thickness was 3 μm.

[0172] (5) On the other surface of the transparent PET drawn film, ink printing coloring was performed at a running speed of 40 m / min, and the ink layer thickness was 5 μm.

[0173] (6) On the ink printing surface, pressure-sensitive adhesive was coated, and a release film was simultaneously compounded, the release film thickness was 25 μm, the pressure-sensitive adhesive thickness was 12 μm, and the running speed was 15 m / min.

[0174] (7) Finally, pressure-sensitive adhesive was coated on the antioxidant coating layer surface to compound black PET, the black PET thickness was 50 μm, the pressure-sensitive adhesive thickness was 12 μm, and the compounding running speed was 15 m / min.

[0175] Example 5

[0176] (1) Select transparent PET drawn film, the drawn film thickness is 50 μm, haze 1.5-2.0, light transmittance 80-85%. The transparent PET drawn film is subjected to corona treatment.

[0177] (2) One side of the transparent PET drawn film is subjected to corona treatment, the corona power is 2*1.2KW, and the running speed is 70 m / min.

[0178] (3) Aluminum is plated on the corona-treated side of the transparent PET drawn film, the plating layer thickness is 300 nm, and the running speed of the aluminum plating equipment is 500 m / min.

[0179] (4) An antioxidant coating is coated on the aluminum-plated side, the running speed of the coating equipment is 80 m / min, and the coating thickness is 2 μm.

[0180] (5) The other side of the transparent PET drawn film is subjected to ink printing coloring, the running speed is 40 m / min, and the ink layer thickness is 4 μm.

[0181] (6) A black PET film is coated on the antioxidant coating side, the black PET film thickness is 50 μm, the pressure-sensitive adhesive thickness is 10 μm, and the composite running speed is 15 m / min.

[0182] Example 6

[0183] (1) Select transparent PET drawn film, the drawn film thickness is 50 μm, haze 0.8-1.0, light transmittance 90-95%.

[0184] (2) One side of the transparent PET drawn film is subjected to corona treatment, the running speed of the corona equipment is 70 m / min, and the corona power is 2*1.2KW.

[0185] (3) Aluminum is plated on the corona-treated side of the transparent PET drawn film, the aluminum layer thickness is 300 nm, and the running speed of the aluminum plating equipment is 500 m / min.

[0186] (4) An antioxidant coating is coated on the aluminum-plated side, the running speed of the coating equipment is 80 m / min, and the coating thickness is 3 μm.

[0187] (5) The other side of the transparent PET drawn film is subjected to ink printing coloring, the running speed is 40 m / min, and the ink layer thickness is 4 μm.

[0188] (6) A pressure-sensitive adhesive is coated on the ink printing side, and a release film is simultaneously compounded, the release film thickness is 25 μm, the pressure-sensitive adhesive thickness is 15 μm, and the running speed is 15 m / min.

[0189] (7) Finally, a black PET is compounded on the antioxidant coating side by coating a pressure-sensitive adhesive, the black PET thickness is 50 μm, the pressure-sensitive adhesive thickness is 20 μm, and the composite running speed is 15 m / min.

[0190] Example 7

[0191] (1) Select transparent PET drawn film, the thickness of the drawn film is 50 μm, the haze is 2.5-3.0, the light transmittance is 70-75%.

[0192] (2) Perform corona treatment on one side of the transparent PET drawn film, the running speed of the corona equipment is 70 m / min, and the corona power is 2*1.2 KW.

[0193] (3) Perform aluminum plating on the corona-treated side of the transparent PET drawn film, the thickness of the aluminum layer is 400 nm, and the running speed of the aluminum plating equipment is 500 m / min.

[0194] (4) Apply an antioxidant coating on the aluminum-plated side, the running speed of the coating equipment is 80 m / min, and the thickness of the coating is 4 μm.

[0195] (5) Perform ink printing coloring on the other side of the transparent PET drawn film, the running speed is 40 m / min, and the thickness of the ink layer is 4 μm.

[0196] (6) Apply pressure-sensitive adhesive on the ink-printed side, and simultaneously compound a release film, the thickness of the release film is 25 μm, the thickness of the pressure-sensitive adhesive is 15 μm, and the running speed is 15 m / min.

[0197] (7) Finally, apply pressure-sensitive adhesive on the antioxidant coating side to compound black PET, the thickness of the black PET is 50 μm, the thickness of the pressure-sensitive adhesive is 10 μm, and the compounding running speed is 15 m / min.

[0198] Example 8

[0199] (1) Select transparent PET drawn film, the thickness of the drawn film is 50 μm, the haze is 1.5-2.0, and the light transmittance is 85-85%.

[0200] (2) Perform corona treatment on one side of the transparent PET drawn film, the running speed of the corona equipment is 70 m / min, and the corona power is 2*1.2 KW.

[0201] (3) Perform aluminum plating on the corona-treated side of the transparent PET drawn film, the thickness of the aluminum layer is 500 nm, and the running speed of the aluminum plating equipment is 500 m / min.

[0202] (4) Perform ink printing coloring on the other side of the transparent PET drawn film, the running speed is 40 m / min, and the thickness of the ink layer is 4 μm.

[0203] (5) Apply pressure-sensitive adhesive on the ink-printed side, and simultaneously compound a release film, the thickness of the release film is 25 μm, the thickness of the pressure-sensitive adhesive is 15 μm, and the running speed is 15 m / min.

[0204] (6) Finally, the black PET with a thickness of 50 μm and the pressure-sensitive adhesive with a thickness of 10 μm were coated on the surface of the aluminum plating layer, and the composite running speed was 15 m / min.

[0205] The main condition parameters involved in the examples are shown in Tables 1-2 below:

[0206] Table 1

[0207]

[0208]

[0209] Note: " / " in Table 1 represents that the condition parameter is not involved in the specific experiment.

[0210] Table 2

[0211]

[0212] Note: " / " in Table 2 represents that the condition parameter is not involved in the specific experiment.

[0213] Effect Example 1

[0214] Test object: the metal film obtained in Examples 1-8.

[0215] Test method and equipment:

[0216] (1) Test method and equipment for gloss: the test method is to measure the gloss of the functional surface of the sample by using a 60° mirror gloss meter. The test equipment is a German BYK gloss meter AG4563 triangular gloss meter (measurement angle: 60 degrees).

[0217] (2) Test method and equipment for light transmittance: the test method is to test a film piece with a length and width of >2 cm, and the test equipment is a 3M light transmittance tester. (It is known to those skilled in the art that the light transmittance measured by the 3M light transmittance tester is a range value.)

[0218] Test results: as shown in Table 3.

[0219] Table 3

[0220]

[0221] As shown in Table 3, compared with Examples 5-8, the metal film prepared in Examples 1-4 has higher gloss; the light transmittance of the metal film prepared in Examples 1-4 is significantly lower than that of Examples 5-8, and in the actual application process, a very strong metal gloss effect is shown.

[0222] Effect Example 2

[0223] Test object: the metal film obtained in Examples 1-8.

[0224] Test method and equipment: 5-point test is used for comparison, and a 60° specular gloss meter is used to measure the gloss of the functional surface of the sample. Specifically, the sample is divided into upper, lower, left, right and middle five functional surfaces, and one sampling point is taken from each of the five functional surfaces for testing. The gloss uniformity error value is calculated by the formula: gloss uniformity error value = maximum error value ÷ standard value. Test equipment: Germany BYK gloss meter AG4563 triangular gloss meter (measurement angle: 60 degrees).

[0225] Test results: as shown in Table 4.

[0226] Table 4

[0227]

[0228] As can be seen from Table 4, the measured gloss of the metal film of Examples 1-4 is higher than that of Examples 5-8, which can reach 111°, and the gloss uniformity is controlled at about 1.0%. The metal film prepared by Examples 1-4 can better control the metal gloss uniformity through the antioxidant coating, and is good for improving the gloss effect.

[0229] Specifically, the inventors found through experiments that:

[0230] Different thicknesses of the aluminum plating layer can have certain effects on the gloss of the metal film. For example, compared with Example 1, the thickness of the aluminum plating layer in Example 3 is smaller, the uniformity error value of the gloss of the prepared metal film is larger, the gloss of the metal film is slightly lower than that of Example 1, and the gloss effect is poorer.

[0231] Different haze and light transmittance of the base film can have certain effects on the gloss of the metal film. For example, compared with Example 2, the haze of the base film (PET drawn film) in Example 3 is higher, the light transmittance is lower, the uniformity error value of the gloss of the prepared metal film is larger, the gloss of the metal film is slightly lower than that of Example 2, and the gloss effect is poorer. In Example 7, the haze of the base film (PET drawn film) is higher, the light transmittance is lower, the uniformity error value of the gloss of the prepared metal film is larger, and the gloss of the metal film is lower, and the gloss effect is poorer.

[0232] At the same time, changing the thickness of the aluminum plating layer and the thickness of the antioxidant coating can have certain effects on the gloss of the metal film. For example, compared with Example 2, the thickness of the aluminum plating layer in Example 6 is smaller, and the thickness of the antioxidant coating is also smaller. Although the uniformity error value of the gloss of the prepared metal film is equivalent to that of Example 2, the gloss of the metal film is lower, and the gloss effect is poorer.

[0233] Meanwhile, changing the thickness of the antioxidant coating, the thickness of the ink layer, the thickness of the pressure-sensitive adhesive coated on the ink printed surface, and the thickness of the pressure-sensitive adhesive coated on the antioxidant coating surface will have certain effects on the gloss of the metal film. For example, compared with Example 2, in Example 4, the thickness of the antioxidant coating is smaller, the thickness of the ink layer is larger, the thickness of the pressure-sensitive adhesive coated on the ink printed surface is smaller, and the thickness of the pressure-sensitive adhesive coated on the antioxidant coating surface is also smaller. The uniformity error value of the gloss of the prepared metal film is larger, and the gloss of the metal film is lower, and the gloss effect is poorer.

[0234] Compared with Example 1, in Example 5, the thickness of the aluminum plating layer is lower, and the thickness of the antioxidant coating is also smaller. Meanwhile, in the metal film of Example 5, the pressure-sensitive adhesive composite release film is not coated on the ink printed surface. The uniformity error value of the gloss of the prepared metal film is larger, and the gloss of the metal film is lower than that of Example 1, and the gloss effect is poorer.

[0235] Compared with Example 1, in Example 8, the metal film does not have an antioxidant coating. The uniformity error value of the gloss of the prepared metal film is larger than that of Example 1, the uniformity of the gloss is poorer, and the gloss of the metal film is lower than that of Example 1, and the gloss effect is poorer.

[0236] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced, without departing from the essence and scope of the technical solutions of the present application.

Claims

1. A metal film, characterized by, It comprises a base film; One side of the base film is sequentially stacked with a metal layer, a first adhesive layer, and a resin film; The other side of the base film is sequentially stacked with a coloring layer, a second adhesive layer, and a release film; One side of the base film is stacked with a metal layer, and then stacked with an antioxidant coating; The light transmittance of the base film is 80-97%; The thickness of the base film is 30-50 μm; The haze of the base film is 0.2-3.0; The thickness of the metal layer is 400-500 nm; The light transmittance of the resin film is 70-97%; The thickness of the resin film is 20-80 μm; The haze of the resin film is 0.2-3.0; The composition of the antioxidant coating is polyurethane and / or epoxy resin; The light transmittance of the metal film is 3-24%; The composition of the first adhesive layer is acrylic resin; The resin film is a polyester film; The composition of the coloring layer is one or more of acrylic ink, polyurethane ink, and phenolic resin ink; The composition of the second adhesive layer is acrylic resin.

2. The metal film of claim 1, wherein It meets one or more of the following conditions a-g; a. The thickness of the base film is 40-50 μm; b. The thickness of the antioxidant coating is 1-10 μm; c. The composition of the antioxidant coating is polyurethane or epoxy resin; d. The thickness of the first adhesive layer is 5-30 μm; e. The thickness of the resin film is 25-50 μm; f. The thickness of the coloring layer is 1-8 μm; g. The light transmittance of the metal film is 3%-18%.

3. The metal film of claim 2, wherein It meets one or more of the following conditions a-e; a. The thickness of the antioxidant coating is 1-5 μm; b. The thickness of the first adhesive layer is 10-15 μm; c. The thickness of the resin film is 30 μm or 40 μm; d. The thickness of the coloring layer is 2-5 μm; e. The light transmittance of the metal film is 3-4% or 10-12%.

4. The metal film of claim 2, wherein It meets one or more of the following conditions a-c; a. The thickness of the antioxidant coating is 2 μm; b. The thickness of the first adhesive layer is 12 μm; c. The thickness of the coloring layer is 4 μm.

5. The metal film of claim 2, wherein The thickness of the antioxidant coating is 3-5 μm.

6. The metal film of claim 2, wherein The thickness of the antioxidant coating is 4 μm.

7. The metal film of claim 2, wherein The metal film meets conditions a-g at the same time.

8. The metal film of claim 1, wherein It meets one or more of the following conditions a-e; a. The haze of the base film is 0.5-2.0; b. The light transmittance of the base film is 80-85% or 90-95%; c. The metal layer is an aluminum plating layer; d. The haze of the resin film is 0.5-2.0; e. The light transmittance of the resin film is 80-97%.

9. The metal film of claim 8, wherein It meets one or more of the following conditions a-i; a. The haze of the base film is 0.8-1.0 or 1.5-2.0; b. The thickness of the aluminum plating layer is 200-800 nm; c. The resin film is a PET film; d. The haze of the resin film is 0.8-1 or 1.5-2.0; e. The light transmittance of the resin film is 80-85% or 90-95%; f. The composition of the coloring layer is polyurethane ink; g. The thickness of the second adhesive layer is 5-30 μm; h. The release film is a polyester release film; i. the thickness of the release film is 20-80 μm.

10. The metal film of claim 8, wherein It meets one or more of the following conditions a-d; a. the thickness of the aluminum plating layer is 300-500 nm; b. the thickness of the second adhesive layer is 10-20 μm; c. the release film is a PET release film; d. the thickness of the release film is 25-50 μm.

11. The metal film of claim 8, wherein The thickness of the aluminum plating layer is 400 nm. And / or, the thickness of the second adhesive layer is 12 μm, 15 μm or 18 μm.

12. The metal film of claim 8, wherein The metal film meets conditions a-e at the same time.

13. A method of producing a metal film, characterized by, It includes the following steps: S1, corona treatment is performed on one side of the base film; S2, metal plating is performed on the corona side of the base film to obtain a metal layer, and an antioxidant coating is applied on the metal layer; S3, printing a colored layer on the other side of the base film; a second adhesive layer is applied on the colored layer to obtain a synchronous composite release film; S4, a first adhesive layer is applied on the antioxidant coating to obtain a composite resin film; The light transmittance of the base film is 80-97%; The thickness of the base film is 30-50 μm; The haze of the base film is 0.2-3.0; The thickness of the metal layer is 400-500 nm; The light transmittance of the resin film is 70-97%; The thickness of the resin film is 20-80 μm; The haze of the resin film is 0.2-3.0; The composition of the antioxidant coating is polyurethane and / or epoxy resin; The light transmittance of the metal film is 3-24%; The composition of the first adhesive layer is acrylic resin; The base film is a polyester film; The composition of the colored layer is one or more of acrylic ink, polyurethane ink and phenolic resin ink; The composition of the second adhesive layer is acrylic resin.

14. The method of producing a metal film according to claim 13, wherein It meets one or more of the following conditions a-e; a. In S1, the thickness of the base film is 40-50 μm; b. In S1, the base film is an opaque base film or a transparent base film; c. In S1, the haze of the base film is 0.5-2.0; d. In S1, the light transmittance of the base film is 80-85% or 90-95%; e. In S1, the corona treatment device used is a corona machine.

15. The method of claim 14, wherein the metal film is formed by sputtering. It meets one or more of the following conditions a-c; a. In S1, the base film is a PET film; b. In S1, the base film is a transparent base film; c. In S1, the haze of the base film is 0.8-1.0 or 1.5-2.

0.

16. The method of claim 14, wherein the metal film is formed by sputtering. The preparation method of the metal film meets conditions a-e at the same time.

17. The method of claim 13, wherein the metal film is formed by sputtering. It meets one or more of the following conditions a-c; a. In S2, when the metal layer is an aluminum plating layer, the aluminum plating layer is obtained by vacuum aluminum plating process; b. In S2, when the metal layer is an aluminum plating layer, the device for preparing the aluminum plating layer is a German Leybold PRO-M2100 type high vacuum winding plating film device; c. The thickness of the antioxidant coating is 1-10 μm.

18. The method of producing a metal film according to claim 17, wherein The thickness of the antioxidant coating is 1-5 μm.

19. The method of claim 18, wherein the metal film is formed by sputtering. The thickness of the antioxidant coating is 2 μm.

20. The method of claim 17, wherein the metal film is formed by sputtering. The thickness of the antioxidant coating is 3-5 μm.

21. The method of claim 20, wherein The thickness of the antioxidant coating is 4 μm.

22. The method of claim 17, wherein the metal film is formed by sputtering. The preparation method of the metal film meets conditions a-c at the same time.

23. The method of claim 13, wherein the metal film is formed by sputtering. In S3, the thickness of the colored layer is 1-8 μm.

24. The method of claim 23, wherein the metal film is formed by sputtering. In S3, the colored layer has a thickness of 2-5 μm. In S3, the colored layer has a component of polyurethane ink.

25. The method of claim 23, wherein the metal film is formed by sputtering. In S3, the colored layer has a thickness of 4 μm. In S3, the second adhesive layer has a thickness of 5-30 μm.

26. The method of claim 23, wherein the metal film is prepared by a method comprising: The second adhesive layer has a thickness of 10-20 μm.

27. The method of claim 23, wherein the metal film is formed by sputtering. The second adhesive layer has a thickness of 12 μm, 15 μm or 18 μm.

28. The method of claim 23, wherein the metal film is prepared by a method comprising: The release film is a polyester release film.

29. The method of claim 23, wherein the metal film is formed by sputtering. The release film is a PET release film.

30. The method of claim 23, wherein the metal film is prepared by a method comprising: The release film has a thickness of 20-80 μm.

31. The method of claim 23, wherein the metal film is formed by sputtering. The release film has a thickness of 25-50 μm.

32. The method of producing a metal film according to claim 13, wherein It satisfies one or more of the following conditions a-e; a. In S4, the first adhesive layer has a thickness of 5-30 μm; b. In S4, the resin film has a thickness of 25-50 μm; c. In S4, the resin film is a polyester film; d. In S4, the resin film has a haze of 0.5-2.0; e. In S4, the resin film has a light transmittance of 80-97%.

33. The method of claim 32, wherein the metal film is formed by sputtering. It satisfies one or more of the following conditions a-e; a. In S4, the first adhesive layer has a thickness of 10-15 μm; b. In S4, the resin film has a thickness of 30 μm or 40 μm; c. In S4, the resin film is a PET film; d. In S4, the resin film has a haze of 0.8-1 or 1.5-2.0; e. In S4, the resin film has a light transmittance of 80-85% or 90-95%.

34. The method of claim 33, wherein the metal film is prepared by sputtering. In S4, the first adhesive layer has a thickness of 12 μm.

35. The method of claim 32, wherein the metal film is prepared by sputtering. The method for preparing the metal film satisfies conditions a-e simultaneously.

36. A metal film prepared by the method for preparing the metal film according to any one of claims 13-35.

37. Use of the metal film according to any one of claims 1-12 and 36 as a decorative material in the fields of architecture, home appliances and decoration.

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