An ultra-thin silver-coated HDPE film based on a temporary carrier film

Abstract

The utility model provides a kind of ultra-thin silver-plated HDPE film based on temporary film carrier, including polyethylene film and polyethylene terephthalate film carrier, the polyethylene film and the polyethylene terephthalate film carrier are adsorbed by electrostatic force, polyethylene film is adsorbed on polyethylene terephthalate film carrier by electrostatic force, polyethylene terephthalate film carrier provides support for polyethylene film, to solve the flattening and clamping of ethylene film, after silver-plated, polyethylene terephthalate film carrier and polyethylene film are separated by the way of winding stripping, to overcome the operation problem of ultra-thin polyethylene film in PVD silver-plated process.

Description

Technical Field

[0001] This utility model relates to the field of HDPE film technology, specifically to an ultrathin silver-plated HDPE film based on a temporary carrier film. Background Technology

[0002] PE film (i.e., polyethylene film) is a film made from PE granules, characterized by good moisture resistance and low moisture permeability. Depending on the manufacturing method and control measures, it can be divided into low-density, medium-density, high-density polyethylene (HDPE) films and cross-linked polyethylene films, each with different performance characteristics. Due to its excellent barrier properties, good transparency, and low cost, PE film has become an ideal choice for food packaging, electronic product packaging, cosmetic packaging, and other fields, [L1] and is widely used in various commodity packaging. However, existing PE films generally lack antibacterial effects and have poor strength, which limits their application in product packaging, decoration, and other fields. To solve these problems, Chinese patent document CN222271530U describes a high-strength antibacterial PE film, which uses a silver ion coating on the PE film body layer. The silver ion coating provides an antibacterial effect. [L2] However, during production, it was discovered that ultra-thin HDPE films are soft and lack sufficient tensile strength, making them difficult to flatten within the vacuum chamber of PVD equipment. This leads to wrinkles, uneven coating, short circuits, or film breakage. Furthermore, the clamping force of conventional hangers can easily damage or deform the film edges and is unsuitable for roll-to-roll continuous PVD production, limiting production efficiency. In addition, existing technologies that involve coating on thicker substrates and then peeling off have interface characteristics and process logic that are drastically different from the coating requirements of ultra-thin HDPE films, making them unsuitable for direct application.

[0003] In summary, the existing technology lacks a solution suitable for PVD coating of ultra-thin HDPE films. Such a solution must meet three core requirements simultaneously: first, it must provide sufficient support strength for the ultra-thin HDPE film to ensure flatness during the coating process; second, it must be easy to peel off from the HDPE film after coating; and third, the peeling process must not affect the quality of the coating on the HDPE film surface. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose an ultra-thin silver-plated HDPE film based on a temporary carrier film to solve the problems mentioned in the background section above.

[0005] This utility model is achieved through the following technical solution: An ultrathin silver-plated HDPE film based on a temporary carrier film includes a polyethylene film and a polyethylene terephthalate carrier film, wherein the polyethylene film and the polyethylene terephthalate carrier film are adsorbed by electrostatic force.

[0006] Furthermore, the thickness of the polyethylene terephthalate carrier film is 50 μm-125 μm.

[0007] Furthermore, the thickness of the polyethylene film is less than 50 μm.

[0008] Furthermore, the polyethylene film has a transition layer, a silver layer, and a protective layer sequentially provided on the side away from the polyethylene terephthalate carrier film.

[0009] Furthermore, the transition layer is a silicon dioxide layer, and the protective layer is a silicon layer or an aluminum layer.

[0010] Furthermore, the thickness of the transition layer is 20nm±5nm, the thickness of the silver layer is 150nm±20nm, and the thickness of the protective layer is 30nm±5nm.

[0011] The beneficial effects of this utility model are as follows: An ultra-thin silver-plated HDPE film based on a temporary carrier film includes a polyethylene film and a polyethylene terephthalate carrier film. The polyethylene film and the polyethylene terephthalate carrier film are electrostatically adsorbed, with the polyethylene film being electrostatically adsorbed onto the polyethylene terephthalate carrier film. The polyethylene terephthalate carrier film provides support for the polyethylene film, thereby solving the problem of flattening and clamping the polyethylene film. After silver plating is completed, the polyethylene terephthalate carrier film is separated from the polyethylene film by a winding and peeling method, thereby overcoming the operational difficulties of ultra-thin polyethylene films in the PVD silver plating process. Attached Figure Description

[0012] Figure 1 This is a front view of the ultra-thin HDPE film of this utility model.

[0013] Figure 2 This is a process flow diagram of the ultra-thin HDPE film of this utility model.

[0014] The above figures include the following reference numerals: 1. Polyethylene film; 2. Polyethylene terephthalate carrier film; 3. Transition layer; 4. Silver layer; 5. Protective layer. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is intended to aid in understanding this utility model, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0016] Reference Figure 1 As shown, an ultrathin silver-plated HDPE film based on a temporary carrier film includes a polyethylene film 1 (i.e., PE film) and a polyethylene terephthalate carrier film 2 (i.e., PET carrier film), wherein the polyethylene film 1 and the polyethylene terephthalate carrier film 2 are adsorbed by electrostatic force.

[0017] The polyethylene film 1 has a transition layer 3, a silver layer 4, and a protective layer 5 sequentially disposed on the side away from the polyethylene terephthalate carrier film 2. The transition layer 3 is a silicon dioxide layer, and the protective layer 5 is a silicon layer or an aluminum layer.

[0018] The materials used in the polyethylene film 1, polyethylene terephthalate carrier film 2, transition layer 3, silver layer 4, and protective layer 5 are existing materials technologies. The transition layer 3, silver layer 4, and protective layer 5 are deposited on the surface of the polyethylene film 1 through a PVD process. For example, PVD is a physical vapor deposition technology. In a vacuum environment, the material is converted into a gaseous or ionic state through physical means such as evaporation and sputtering, so that it is deposited on the surface of the polyethylene film 1 to form a uniform silicon dioxide layer, silver layer 4, silicon layer, or aluminum layer, etc. The PVD deposition technology is an existing technology.

[0019] Among them, the transition layer 3 is made of silicon dioxide, which has excellent interfacial compatibility with both the polyethylene film 1 and the silver layer 4, and can effectively solve the problem of insufficient adhesion when the silver layer 4 is directly bonded to the polyethylene film 1.

[0020] By setting a silver layer 4, the excellent antibacterial properties of silver can be fully utilized, solving the defect of the polyethylene film 1 having no antibacterial effect and meeting the hygiene requirements of food, medical and other fields. It can also give the film good conductivity and electromagnetic shielding properties, expanding its application in electronic packaging, flexible electronics and other scenarios.

[0021] The protective layer 5 is a silicon or aluminum layer, which can effectively isolate external environmental factors such as air and moisture, prevent the silver layer 4 from oxidizing and turning black, and prevent wear and scratches, thus extending the functional life of the film.

[0022] Furthermore, the thickness of the polyethylene terephthalate carrier film 2 is 50 μm-125 μm. The thickness of the polyethylene film 1 is less than 50 μm. Preferably, the thickness of the polyethylene terephthalate carrier film 2 is 75 μm, and the thickness of the polyethylene film 1 is 25 μm.

[0023] The polyethylene terephthalate carrier film 2 is selected with a thickness of 50μm-125μm, which can provide sufficient support strength for ultra-thin PE films with a thickness of less than 50μm. It effectively avoids the problem of wrinkles and inability to flatten due to insufficient tension in the PVD vacuum chamber, ensures the uniformity of the coating during the silver plating process, and eliminates the risk of short circuit or film breakage.

[0024] The thickness of the transition layer 3 is 20nm±5nm, the thickness of the silver layer 4 is 150nm±20nm, and the thickness of the protective layer 5 is 30nm±5nm.

[0025] The transition layer 3 meets the above parameters: it avoids insufficient adhesion due to excessive thickness, and also avoids affecting the flexibility of the PE silver layer 4 film due to excessive thickness. The transition layer 3 meets the above parameters: it avoids functional failure due to excessive thickness, and also avoids waste of silver material due to excessive thickness. The protective layer 5 meets the above parameters: it avoids ineffective isolation of air and moisture due to excessive thickness, thus failing to provide anti-oxidation and anti-wear protection for the silver layer 4, and also avoids increasing the overall thickness and hardness of the film due to excessive thickness.

[0026] Reference Figure 2 As shown, the specific process steps for an ultrathin silver-plated HDPE film based on a temporary carrier film are as follows: Firstly, a 25μm thick polyethylene film 1 is selected as the substrate, paired with a 75μm thick electrostatic adsorption type polyethylene terephthalate carrier film 2 (with a surface resistivity of 10^10Ω / sq) to ensure that the material specifications meet the process requirements.

[0027] Secondly, under normal temperature conditions, a laminating machine is used to press the polyethylene film 1 and the polyethylene terephthalate carrier film 2 together. During the pressing process, the linear pressure is controlled at 5 kg / cm to achieve a stable electrostatic adsorption bonding between the two.

[0028] Third, the transition layer 3, the silver layer 4, and the protective layer 5 are sequentially sputtered and deposited using a PVD coating process.

[0029] Fourth, a rewinding machine is used to peel off the polyethylene film 1 and the polyethylene terephthalate carrier film 2. The peeling angle is controlled at 180 degrees and the peeling speed is set at 0.5 m / min to ensure a smooth peeling process. After peeling, an intact, undamaged, ultra-thin HDPE film product with a silver layer 4 is obtained.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An ultrathin silver-plated HDPE film based on a temporary carrier film, characterized in that: It includes a polyethylene film (1) and a polyethylene terephthalate carrier film (2), which are adsorbed by electrostatic force.

2. The ultrathin silver-plated HDPE film based on a temporary carrier film according to claim 1, characterized in that: The thickness of the polyethylene terephthalate carrier film (2) is 50 μm-125 μm.

3. The ultrathin silver-plated HDPE film based on a temporary carrier film according to claim 2, characterized in that: The thickness of the polyethylene film (1) is less than 50 μm.

4. The ultrathin silver-plated HDPE film based on a temporary carrier film according to claim 1, characterized in that: The polyethylene film (1) has a transition layer (3), a silver layer (4) and a protective layer (5) sequentially disposed on the side away from the polyethylene terephthalate carrier film (2).

5. The ultrathin silver-plated HDPE film based on a temporary carrier film according to claim 4, characterized in that: The transition layer (3) is a silicon dioxide layer, and the protective layer (5) is a silicon layer or an aluminum layer.

6. The ultrathin silver-plated HDPE film based on a temporary carrier film according to claim 5, characterized in that: The thickness of the transition layer (3) is 20nm±5nm, the thickness of the silver layer (4) is 150nm±20nm, and the thickness of the protective layer (5) is 30nm±5nm.

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