Aluminum laminated film with uniform aluminum layer

Abstract

The utility model relates to an aluminum laminated film with a uniform aluminum layer, which belongs to the technical field of aluminum laminated films and comprises a substrate layer, a transition layer and an electroplated layer which are sequentially arranged, the diffusion layer is embedded in the transition layer, the diffusion layer is made of metal oxide, the diffusion layer is used for uniformizing the electroplated layer, and the diffusion layer is composed of the metal oxide and can promote uniform adsorption and deposition of aluminum ions on the surface of the transition layer, so that the non-uniformity of the electroplated layer is avoided; aluminum is deposited on the transition layer after being treated, and due to the existence of the diffusion layer in the transition layer, the electroplated layer can uniformly and compactly cover the surface of the base material.

Description

Technical Field

[0001] The utility model belongs to the technical field of aluminized films, and particularly relates to an aluminized film with uniform aluminum layer. Background Art

[0002] As a composite material with a thin aluminum film deposited on the surface of a plastic film by physical or chemical methods, the aluminized film combines the flexibility of plastic and the superior physical properties of aluminum, and is widely used in many fields such as food packaging, pharmaceutical packaging, electronic product packaging, waterproof materials, reflective materials, electromagnetic shielding, etc.

[0003] The aluminized film evaporates high-purity aluminum wire into a gaseous state at high temperature through a vacuum aluminizing process. Then, when the plastic film passes through the vacuum evaporation chamber, the gaseous aluminum molecules precipitate on the surface of the plastic film to form a film with a bright metallic color. This material has both the characteristics of a plastic film and those of a metal, so it is called an aluminized film. Film layer uniformity refers to the uniformity of physical properties such as film layer thickness, gloss, and crystallization obtained by aluminizing or film laminating on the substrate.

[0004] In the prior art, the aluminized film usually deposits a thin aluminum film on a plastic substrate through a vacuum aluminizing process. Although this structure combines the flexibility of plastic and the superior physical properties of aluminum, in actual applications, the uniformity of the aluminum layer is often affected by various factors such as the smoothness of the substrate surface, evaporation rate, and vacuum degree, resulting in uneven distribution of the aluminum layer, and thus affecting the optical properties, barrier properties, and mechanical strength of the aluminized film.

[0005] Therefore, there is an urgent need for a solution to the problem of uneven aluminized film. Summary of the Utility Model

[0006] To solve the above problems existing in the prior art, the utility model provides an aluminized film with uniform aluminum layer, which solves the problem of uneven aluminizing of the existing aluminized film.

[0007] The purpose of the utility model can be achieved by the following technical solutions:

[0008] An aluminized film with uniform aluminum layer, comprising a base layer, a transition layer, and an electroplating layer arranged in sequence;

[0009] A diffusion layer is embedded in the transition layer, and the diffusion layer is made of a metal oxide, and the diffusion layer is used to make the electroplating layer uniform.

[0010] Preferably, the thickness of the transition layer is 6 - 50 μm.

[0011] Preferably, the base layer is made of polyethylene terephthalate material.

[0012] Preferably, the thickness of the electroplating layer is 30 - 500 nm.

[0013] Preferably, a protective layer is further provided on the outer side of the electroplated layer, and the protective layer is made of a transparent organic polymer material.

[0014] Preferably, it includes a positioning grid layer, the positioning grid layer is located between the transition layer and the electroplated layer, and the positioning grid layer is composed of fine line grids.

[0015] The beneficial effects of the present utility model are as follows:

[0016] The diffusion layer is composed of metal oxides, which can promote the uniform adsorption and deposition of aluminum ions on the surface of the transition layer, thereby avoiding the non-uniformity of the electroplated layer; after aluminum is treated and deposited on the transition layer, due to the presence of the diffusion layer in the transition layer, the electroplated layer can evenly and densely cover the surface of the substrate. Description of the Drawings

[0017] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic structural diagram of an aluminized film provided by the present utility model in an embodiment;

[0019] Figure 2 It is a schematic structural diagram of the positioning grid layer provided by the present utility model in an embodiment;

[0020] Legend: 1. Base layer; 2. Transition layer; 3. Electroplated layer; 4. Diffusion layer; 5. Positioning grid layer; 6. Protective layer. Detailed Embodiments

[0021] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following will, with reference to the accompanying drawings and preferred embodiments, describe in detail the specific embodiments, structures, features and effects according to the present utility model.

[0022] As Figure 1 - Figure 2As shown, an aluminized film with uniform aluminum layer includes a base layer 1, a transition layer 2, and an electroplated layer 3 arranged in sequence; as the support layer of the aluminized film, a material with good mechanical properties and chemical stability is usually selected. The base layer 1 provides the necessary strength and stability for the entire aluminized film; the design of the transition layer 2 is to improve the interfacial bonding force between the base layer 1 and the electroplated layer 3 and serve as a medium for the uniform deposition of the electroplated layer 3. The diffusion layer 4 embedded in the transition layer 2 is made of metal oxides, and these metal oxides have good dispersibility and adsorption, and can guide the uniform deposition of aluminum ions on the substrate surface during the electroplating process; the diffusion layer 4 made of metal oxides, such as alumina (Al2O3), etc., its tiny particles can form tiny sites in the electroplating solution, capture and evenly distribute aluminum ions, and can promote the uniform adsorption and deposition of aluminum ions on the surface of the transition layer 2, thus avoiding the non-uniformity of the electroplated layer 3; after being treated, aluminum is deposited on the transition layer 2. Due to the existence of the diffusion layer 4 in the transition layer 2, the electroplated layer 3 can evenly and densely cover the substrate surface, forming an aluminized film with good barrier properties, reflectivity, and antistatic ability;

[0023] A diffusion layer 4 is embedded in the transition layer 2. The diffusion layer 4 is made of metal oxides and is used to make the electroplated layer 3 uniform; there may be a certain degree of lattice matching between the metal oxides and the aluminum coating. This matching helps aluminum ions form uniform crystal nuclei on the surface of the diffusion layer 4 and induces the growth of the aluminum coating centered on these crystal nuclei. In this way, the diffusion layer 4 not only provides sites for the deposition of aluminum ions but also guides the growth direction of the aluminum coating, thus achieving the uniformity of the coating. The diffusion layer 4 is composed of metal oxides (such as alumina), and these have a large specific surface area and surface energy, and can effectively adsorb aluminum ions in the electroplating solution. The tiny size and distribution of the metal oxides enable them to form a large number of tiny sites on the surface of the transition layer 2, and these sites can evenly capture and disperse aluminum ions, thus avoiding the local accumulation of aluminum ions during the electroplating process.

[0024] In one embodiment, the thickness of the transition layer 2 is 6 - 50 μm. The thickness of the transition layer 2 is a crucial parameter. It directly affects the uniformity, adhesion, and overall performance of the electroplated layer 3. A transition layer 2 with a thickness less than 6 μm may face challenges in the uniformity of the electroplated layer 3. Due to the limited distribution space of metal oxides, it may be difficult to form sufficient sites to uniformly capture and disperse aluminum ions, resulting in non-uniformity in the electroplated layer 3, forming spots or stripes, which affects the overall aesthetics and performance of the coating. In addition, one of the main functions of the transition layer 2 is to enhance the adhesion between the electroplated layer 3 and the base layer 1. If the transition layer 2 is too thin, the physical barrier it provides will be weakened, and the electroplated layer 3 may easily fall off or peel during use. When the thickness of the transition layer 2 is greater than 50 μm, first, a thicker transition layer 2 means more materials are needed for preparation, which will directly increase production costs. A too-thick transition layer 2 may introduce stress concentration problems during the electroplating process. A thicker transition layer 2 may make subsequent processing and handling (such as cutting, bending, winding, etc.) more difficult. This may lead to a decrease in production efficiency and an increase in the scrap rate. When subjected to external forces, these stress concentration points may become the starting points of cracks or fractures, affecting the strength and durability of the aluminized film and directly affecting the use of the aluminized film in the packaging industry. A transition layer 2 with a thickness of 6 - 50 μm makes the entire aluminized film thinner and lighter, which is beneficial for use in occasions where weight reduction or material cost reduction is required. A thinner transition layer 2 absorbs and scatters less light, which is beneficial for maintaining the high light transmittance of the aluminized film and is suitable for fields that require good optical properties. However, when an aluminized film with strong adhesion and wear resistance needs to be prepared, the thickness of the transition layer 2 increases. A thicker transition layer 2 can provide a better physical barrier and enhance the adhesion between the electroplated layer 3 and the base layer 1. This helps prevent the coating from falling off or peeling during use. The thick transition layer 2 can also improve the wear resistance of the aluminized film, enabling it to withstand greater mechanical stress and frictional damage. A transition layer 2 with a thickness of 50 μm provides sufficient distribution space for metal oxides, enabling aluminum ions to be uniformly captured and dispersed in a wider area. This helps achieve uniform deposition of the electroplated layer 3 and improves the quality and performance of the coating.

[0025] In one embodiment, the surface of the base layer 1 made of polyethylene terephthalate material is strictly cleaned and pretreated to ensure no impurities such as oil stains and oxides, providing a good foundation for the subsequent deposition of the aluminum layer. Polyethylene terephthalate, i.e., PET material, has high strength and stiffness, enabling the base layer 1 to withstand certain mechanical stresses and pressures, ensuring the overall stability and durability of the aluminized film. PET has good folding resistance and is not easily broken or deformed even after multiple bends or folds, which is particularly important for packaging occasions that require frequent bending or winding. PET is a recyclable plastic material, meeting environmental protection requirements. Using PET as the base layer 1 helps reduce waste generation and promote resource recycling. The PET base layer 1 is non-toxic, odorless, and has good hygienic safety, and can be directly used for packaging food and beverages. Its excellent barrier properties help maintain the freshness and taste of food and beverages.

[0026] In one embodiment, the thickness of the electroplated layer 3 is in the range of 30 - 500 nm. The electroplated layer 3 is uniformly coated on the surface of the base layer 1 through process methods such as chemical vapor deposition, physical vapor deposition, or solution method. The selection of the thickness of the electroplated layer 3 is crucial for the performance and use of the electroplated part. For an electroplated layer 3 with a thickness less than 30 nm, it cannot effectively isolate the corrosion medium, resulting in corrosion of the electroplated part in a short time and the electroplated layer 3 being too thin may cause uneven surface and poor gloss, affecting the overall aesthetics of the product. While for an electroplated layer 3 with a thickness greater than 500 nm, more electroplating materials and energy are required, leading to an increase in production costs. In addition, the chemical reagents used and the waste water and waste gas generated during the electroplating process of an electroplated layer 3 with too large a thickness may cause environmental pollution. An electroplated layer 3 with too large a thickness means more chemical reagents need to be consumed and more waste is generated, thus increasing the risk of environmental pollution. In addition, an electroplated layer 3 with too large a thickness may also pose safety hazards during subsequent processing, such as being flammable and explosive, etc. Therefore, selecting a suitable thickness within the range of 30 - 500 nm can ensure that the electroplated part has excellent performance and a long service life. At the same time, the thickness of the electroplated layer 3 that is too thin or too thick should be avoided to prevent adverse effects.

[0027] In one embodiment, a protective layer 6 is further provided on the outer side of the electroplated layer 3. The protective layer 6 is made of a transparent organic polymer material. Although the electroplated layer 3 has various excellent properties, it may be relatively fragile or easily damaged itself. Especially during use or storage, the electroplated layer 3 is prone to mechanical scratches, chemical corrosion, or environmental factors. Therefore, a protective layer 6 is needed to provide additional protection to prevent the electroplated layer 3 from being damaged. Transparent organic polymer materials usually have good wear resistance, scratch resistance, and chemical corrosion resistance. By forming the protective layer 6 on these materials, the overall durability of the plated part can be significantly improved, and its service life can be extended. The transparent protective layer 6 can not only protect the electroplated layer 3 but also enhance the overall aesthetics and texture of the product. This makes the product more attractive, thereby increasing its market value and added value. Since the protective layer 6 has the characteristics of stain resistance and easy cleaning, the daily maintenance work of the plated part can be simplified. Users only need to simply wipe it to keep the plated part clean and shiny, without complex cleaning processes. The protective layer 6 is evenly covered on the surface of the aluminum layer by processes such as coating, printing, or vacuum coating.

[0028] In one embodiment, a positioning grid layer 5 is further included. The positioning grid layer 5 is located between the transition layer 2 and the electroplated layer 3. The positioning grid layer 5 is composed of fine line grids, which helps to increase the contact area between the transition layer 2 and the electroplated layer 3, thereby enhancing the adhesion between the two. This is crucial for improving the stability and durability of the coating. The positioning grid layer 5 significantly improves the quality of the coating by enhancing adhesion, optimizing the coating distribution, and preventing cracks. This makes the coating more uniform, dense, and durable, and can meet higher application requirements. During the electroplating process, the distribution of the plating solution on the surface of the substrate may be uneven, resulting in inconsistent coating thickness. The positioning grid layer 5 can serve as a guiding structure to help the plating solution be more evenly distributed on the surface of the substrate, thereby optimizing the coating distribution and improving the quality of the coating.

[0029] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to form equivalent embodiments with equivalent changes, but as long as the technical content of the present invention is not departed from, any brief modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An aluminized film with uniform aluminum layer, characterized in that, It includes a base layer, a transition layer, and a plating layer arranged in sequence; A diffusion layer is embedded in the transition layer. The diffusion layer is made of metal oxide and is used to make the plating layer uniform.

2. The aluminized film with uniform aluminum layer according to claim 1, characterized in that, The thickness of the transition layer is 6 - 50 μm .

3. An aluminized film with uniform aluminum layer according to claim 1, characterized in that, The base layer is made of polyethylene terephthalate material.

4. The aluminized film with uniform aluminum layer according to claim 1, wherein The thickness of the electroplated layer is 30 - 500 n m .

5. An aluminized film with uniform aluminum layer according to claim 1, characterized in that, A protective layer is further arranged on the outer side of the plating layer. The protective layer is made of a transparent organic polymer material.

6. The aluminized film with uniform aluminum layer according to claim 1, characterized in that, It further includes a positioning grid layer. The positioning grid layer is located between the transition layer and the plating layer and is composed of fine line grids.

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