A multicolor single-sided reflective film

Abstract

The utility model relates to the technical field of reflection film, especially a kind of multicolor single-sided reflection film, comprising: the color film base layer of the multilayer co-extrusion film consisting of 2 or more, color film base layer is attached with a layer of white PET layer that makes color film base layer single-sided reflection, white PET layer contains titanium dioxide, makes color film base layer color present the cold tone of partial blue, color film base layer and white PET layer between there is adhesive layer.The utility model is through the simple structure of "color film base layer+adhesive layer+white PET layer", single-sided reflection effect can be realized, the reflected light tone presented finally is naturally inclined to blue, cold tone, avoid the thickness and weight increase caused by multilayer composite, and low in cost.Meanwhile, the main component of material is PET and adhering agent, more easily recycled and separated processing, meet the sustainable development requirement of green environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of reflective film technology, and in particular to a multi-color single-sided reflective film. Background Technology

[0002] High-reflectivity thin-film materials are widely used because they can give products a luxurious metallic texture, enhance visual impact, and elevate product quality. Traditional metallized reflective films (such as silver-plated films and aluminum-plated films) are the mainstream technical solutions for achieving this effect. However, these materials have gradually revealed many inherent defects in practical applications and market development.

[0003] 1. From a cost perspective, the production of traditional metallized films heavily relies on vacuum coating technology. This process involves huge equipment investment, high energy consumption, and a complex production process, resulting in high final product costs. Furthermore, the metal targets used (such as aluminum and silver) are commodities whose prices are easily affected by fluctuations in the international market, further increasing the unpredictability of production cost control.

[0004] 2. From an optical perspective, traditional metal coatings often exhibit a warm yellowish hue in their reflected light. This inherent color bias limits their application in designs that aim for a modern, cool, and high-tech aesthetic. While color adjustments can be made by adding paint or combining other film materials, this increases production steps and material costs, and makes the film structure more complex.

[0005] 3. Environmental resistance is also a major challenge. Metal layers, especially thinner plating layers, are prone to oxidation and corrosion in humid environments, leading to decreased reflectivity, surface blackening, or spots, which seriously affects the product's appearance durability and service life.

[0006] 4. Existing technologies typically employ multi-layer composite structures (such as BOPP / aluminized layer / adhesive / PE, etc.) to achieve single-sided reflection and protect the metal layer. This not only increases the thickness and weight of the material but also makes recycling and separation more difficult, which conflicts with the current concepts of green environmental protection and sustainable development.

[0007] Therefore, the market urgently needs a new type of reflective film material that can overcome the above-mentioned technical bottlenecks. Utility Model Content

[0008] Based on this, it is necessary to provide a multi-color single-sided reflective film to address the above problems. The multi-color single-sided reflective film includes a color film base layer composed of two or more multi-layer co-extruded layers. A white PET layer is attached to the color film base layer to make the color film base layer reflect one side. The white PET layer contains titanium dioxide, which makes the color of the color film base layer have a cool bluish tone. An adhesive layer is provided between the color film base layer and the white PET layer.

[0009] Furthermore, the adhesive layer uses an adhesive agent, which is applied to the surface of the color film base layer or the white PET layer to bond the color film base layer and the white PET layer together.

[0010] Furthermore, the thickness of the adhesive layer is 0.1-8 μm.

[0011] Furthermore, the refractive index of the white PET layer is greater than 1.60.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. Achieving a unique and stable cool-toned visual effect: By combining a multi-layer co-extruded film base layer with a high-reflectivity white PET layer, optical principles are cleverly utilized to naturally shift the final reflected light tone towards blue and cool tones. Furthermore, the multi-color film base layer itself can achieve various colors, patterns, or textures through lamination technology. Combined with the cool-toned reflective effect, this achieves an integrated fusion of decoration and functionality, providing greater flexibility and creative space for product design, effectively differentiating itself from the limitations of the warm yellow tone of traditional silver-plated films.

[0014] 2. Environmental stability and durability: Since the entire film structure contains no metal layer, the risk of metal oxidation and corrosion is fundamentally eliminated. The product can maintain its bright color and stable reflectivity for a long time in harsh environments such as humidity and salt spray, without blackening, spots or other deterioration. Its service life and reliability are far superior to traditional metallized films.

[0015] 3. Simplified structure, lightweight and superior environmental friendliness: This utility model achieves a one-sided reflective effect through a simple structure of "color film base layer + adhesive layer + white PET layer," avoiding the increased thickness and weight caused by multi-layer composites, and is also low in cost. Furthermore, the main components of the material are PET and adhesive, making it easier to recycle and separate, meeting the requirements of green and sustainable development. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a multicolor single-sided reflective film. Detailed Implementation

[0017] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0018] Please see Figure 1 This embodiment provides a multi-color single-sided reflective film, which includes a color film base layer 10 composed of multiple multi-color films 11 through an attachment process or a lamination process. A white PET layer 30 is attached to the bottom surface of the color film base layer 10, and an adhesive layer with a thickness of 0.1-0.3 μm is applied to the bottom surface of the color film base layer 10 or the surface of the white PET layer 30 to bond the color film base layer 10 and the white PET layer 30 together. After the adhesive is dried, an adhesive layer 20 is formed. The multi-color film 11 is prepared using a collaborative process.

[0019] The white PET layer 30 contains a high proportion of white pigments such as titanium dioxide (TiO2). These pigments have extremely strong light scattering and reflection capabilities, functioning similarly to miniature diffuse mirrors. When light penetrates the color film substrate 10, it is efficiently reflected back onto the surface of the white PET layer 30, thus simulating the high reflectivity of a metal coating and achieving "one-sided reflection" (i.e., only one side of the color film substrate 10 shows strong reflected light, while the other side remains white).

[0020] Ordinary metallic silver films reflect all visible light uniformly, presenting a neutral silver color. However, their surface usually has an oxide layer, and their microstructure causes the reflected light to have a slightly yellowish (warm) tint. High-quality white PET reflective layers, on the other hand, typically scatter shorter wavelengths of blue light more strongly than longer wavelengths of red light, thus their reflected light spectrum is inherently more biased towards cooler tones (bluish-white). When this cooler light passes through the colored film substrate 10 again, it overlaps with the substrate color, ultimately being perceived by the observer as a bluish, cool luster.

[0021] The thickness of the adhesive layer 20 is set within the range of 0.1-8 μm, ensuring that the refractive index of the white PET layer 30 surface is greater than 1.60. This results in a bluish, cool-toned color for the color film base layer 10. If the adhesive layer is too thick, it may become a weak optical layer, causing unnecessary internal reflections and interference, interfering with the final color rendering effect, and potentially increasing haze and reducing reflective clarity. If it is too thin, it may lead to insufficient bonding strength, resulting in defects (fisheyes) or poor composite adhesion. By ensuring the thickness of the adhesive layer 20, effective adhesion between the white PET layer 30 and the color film base layer 10 is ensured, while maintaining the refractive index of the white PET layer 30 surface, improving overall reflectivity and color saturation. The titanium dioxide contributes to the bluish, cool-toned color of the color film base layer 10. It should be noted that the thickness of the adhesive layer 20 varies depending on the product requirements and can be 0.1 μm, 0.2 μm, 1.0 μm, 2.0 μm, etc., and is not limited in this embodiment.

[0022] In summary, through the synergistic effect of the color film base layer 10, the ultra-thin precision adhesive layer 20, and the high-reflectivity white PET layer 30, the white PET layer 30 replaces the metal to achieve the core reflective function and lay the foundation for the cool tone. Ultimately, a new type of reflective film product with low cost, high reliability, unique cool-toned aesthetics, and easy subsequent processing is achieved.

[0023] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A multicolor single-sided reflective film, characterized in that, include: The base layer is composed of two or more multilayer co-extruded films. A white PET layer is attached to the base layer to make the base layer reflective on one side. The white PET layer contains titanium dioxide, which makes the base layer have a cool bluish color. There is an adhesive layer between the base layer and the white PET layer.

2. The multicolor single-sided reflective film according to claim 1, characterized in that, The adhesive layer uses an adhesive that is applied to the surface of the colored film base layer or the white PET layer to bond the colored film base layer and the white PET layer together.

3. The multicolor single-sided reflective film according to claim 1, characterized in that, The thickness of the adhesive layer is 0.1-0.3 μm.

4. The multicolor single-sided reflective film according to claim 1, characterized in that, The refractive index of the white PET layer is greater than 1.60.

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