A light-sensitive discoloring device middle frame and a forming method thereof

Abstract

This invention provides a photosensitive color-changing device frame and its molding method. The molding method includes: providing a frame substrate; molding a primer layer on the frame substrate; and molding a photosensitive layer on the primer layer. The photosensitive layer changes color under ultraviolet light. By molding the primer layer on the frame substrate and the photosensitive layer on the primer layer, the primer layer helps the photosensitive layer adhere better to the frame substrate, and the photosensitive layer changes color under ultraviolet light, thereby providing richer colors to meet consumer demand.

Description

Technical Field

[0001] This invention relates to the field of equipment frame technology, and in particular to a photosensitive color-changing equipment frame and its molding method. Background Technology

[0002] With the development of technology, consumers have higher requirements for the color of device frames such as mobile phone frames. The colors of device frames produced by existing molding methods are too monotonous and cannot meet the needs of consumers. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a photosensitive color-changing device frame and its molding method, which can provide a richer range of colors to meet consumer demand.

[0004] In a first aspect, embodiments of the present invention provide a method for molding a photosensitive color-changing device frame. The molding method includes: providing a frame substrate; molding a primer layer on the frame substrate; and molding a photosensitive layer on the primer layer, wherein the photosensitive layer is capable of changing color under ultraviolet light.

[0005] The method for molding the frame of a photosensitive color-changing device provided by the first aspect of the present invention has at least the following beneficial effects: By forming a primer layer on the mid-frame substrate and a photosensitive layer on the primer layer, the primer layer can help the photosensitive layer to adhere better to the mid-frame substrate. The photosensitive layer can change color under ultraviolet light, thus providing richer colors to meet consumer needs.

[0006] In one embodiment of this implementation, the photosensitive layer comprises, by weight, 50-70 parts acrylic resin, 20-40 parts organic solvent, and 5-15 parts photosensitive color-changing powder.

[0007] In one embodiment of this implementation, the organic solvent is butyl acetate.

[0008] In one embodiment of this implementation, providing the mid-frame substrate includes: grinding, polishing and ultrasonically cleaning the mid-frame substrate, and wiping the surface of the mid-frame substrate with a lint-free cloth.

[0009] In one embodiment of this implementation, the primer layer comprises, by weight, 60-80 parts acrylic resin, 10-20 parts polyurethane resin, 1-5 parts additives, and 5-15 parts pigment.

[0010] In one embodiment of this implementation, the additive is a silicone-based additive.

[0011] In one embodiment of this implementation, the molding method includes molding a topcoat layer on the photosensitive layer.

[0012] In one embodiment of this implementation, the topcoat layer, by weight, comprises 20-30 parts of polyurethane acrylate, 20-30 parts of modified epoxy resin, 3-6 parts of photoinitiator, 1-3 parts of leveling agent, 30-40 parts of reactive solvent, 0.3-1 parts of dispersant, and 5-12 parts of wax paste.

[0013] In one embodiment of this implementation, the reactive solvent is butyl ester.

[0014] Secondly, embodiments of the present invention provide a photosensitive color-changing device frame, which is manufactured using the molding method described in any embodiment of the first aspect of the embodiments.

[0015] The photosensitive color-changing device frame provided in the second aspect embodiment of the present invention has at least the following beneficial effects: The equipment frame, manufactured using the molding method of the first aspect, can change color under ultraviolet light, thus possessing a wider range of colors to meet consumer demand.

[0016] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic flowchart of a molding method according to one embodiment of the present invention; Figure 2 shows the adoption. Figure 1 A schematic diagram of the structure of the equipment frame obtained by the molding method shown.

[0018] Figure label: The equipment frame is 100; the frame substrate is 10; the primer layer is 20; the photosensitive layer is 30; and the topcoat layer is 40. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this invention, unless otherwise explicitly defined, terms such as "setting," "installing," and "connecting" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0023] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0024] Please see Figure 1 and Figure 2 , Figure 1 Figure 2 is a schematic flowchart of a molding method according to one embodiment of the present invention; Figure 3 is a schematic flowchart of a molding method using... Figure 1 The diagram shows the structure of the device frame 100 obtained by the molding method. This invention provides a molding method for a photosensitive color-changing device frame 100, the molding method comprising: S101: Provides a middle frame substrate 10; S102: Form a primer layer 20 on the middle frame substrate 10; S103: A photosensitive layer 30 is formed on the primer layer 20. The photosensitive layer 30 can change color under ultraviolet light.

[0025] Specifically, the material of the middle frame substrate 10 can be polycarbonate (PC), polycarbonate (PC) mixed with glass fiber, etc. It is understandable that, considering the photosensitive material within the photosensitive layer 30, its adhesion to the middle frame substrate 10 is poor, easily leading to breakage and detachment of the photosensitive layer 30. Therefore, before forming the photosensitive layer 30, a primer layer 20 with better adhesion is formed on the middle frame substrate 10, so that the photosensitive layer 30 can be formed more stably on the middle frame substrate 10. Spraying a primer layer 20 onto the surface of the middle frame substrate 10 can effectively solve surface defects of the substrate 10, and further improve the performance and adhesion of the photosensitive layer 30, allowing the two coats of paint to fuse better to achieve the desired appearance.

[0026] By forming a primer layer 20 on the mid-frame substrate 10 and a photosensitive layer 30 on the primer layer 20, the primer layer 20 can help the photosensitive layer 30 to adhere better to the mid-frame substrate 10. The photosensitive layer 30 can change color under ultraviolet light, thereby providing richer colors to meet consumer demand.

[0027] In one embodiment of this method, the photosensitive layer 30 comprises, by weight, 50-70 parts of acrylic resin, 20-40 parts of organic solvent, and 5-15 parts of photosensitive color-changing powder.

[0028] Understandably, acrylic resin serves as the primary base for the photosensitive layer 30, and its concentration of 50-70 parts ensures robust coating and rapid curing of the photosensitive powder. It also guarantees sufficient film-forming properties, hardness, and reactivity for the photosensitive layer 30. Simultaneously, the high proportion of acrylic resin ensures that the photosensitive layer 30 maintains similar curing speed and chemical compatibility with other primer layers 20, achieving good interlayer bonding. Organic solvent, acting as a regulating medium, is set at 20-40 parts. The organic solvent effectively reduces viscosity, ensuring uniform distribution of the photosensitive powder and guaranteeing the photosensitive color-changing effect. When the organic solvent concentration exceeds 40 parts, the corrosiveness becomes too strong, easily leading to peeling. When the organic solvent concentration is less than 20 parts, the fusion effect of the photosensitive color-changing effect is poor, resulting in uneven distribution and a poor photosensitive color-changing effect. The photosensitive powder, as the effective color-changing component, is set at 5-15 parts, ensuring both adhesion and the color-changing effect.

[0029] In one embodiment of this implementation, the organic solvent is butyl acetate. It is understood that butyl acetate ensures sufficient leveling time for the photosensitive layer 30 to form a smooth, even paint film after it has been sprayed onto the complex surface of the device frame 100.

[0030] Specifically, the content of each component in the photosensitive layer 30 can be selected as follows: 60% acrylic resin, 30% butyl acetate, and 10% photosensitive color-changing powder.

[0031] In one embodiment of this implementation, S101: a middle frame substrate 10 is provided, including: S1011: Grind, polish and ultrasonically clean the middle frame substrate 10, and wipe the surface of the middle frame substrate 10 with a lint-free cloth; Specifically, a lint-free cloth can be used to wipe away dust and dirt from the surface of the middle frame substrate 10.

[0032] This configuration ensures that the surface of the middle frame substrate 10 is free of impurities.

[0033] In some embodiments, in order to improve the adhesion of the primer layer 20, after wiping the middle frame substrate 10 with a lint-free cloth, a treatment agent is sprayed onto the surface of the middle frame substrate 10. The treatment agent may be a ketone-based treatment agent.

[0034] In one embodiment of this method, the primer layer 20, by weight, comprises 60-80 parts acrylic resin, 10-20 parts polyurethane resin, 1-5 parts additives, and 5-15 parts pigment. It is understood that the acrylic resin is the main base of the primer layer 20; setting it at 60-80 parts ensures adhesion and testing performance while maintaining a fast curing speed, preventing excessive brittleness, cracking, and paint peeling. The polyurethane resin, at 10-20 parts, improves strength, abrasion resistance, elasticity, and oil and weather resistance, and through formulation design, can flexibly adapt to various needs, from soft foams to hard coatings. The pigment is key to the specific color of the primer layer 20; setting it at 5-15 parts ensures continuous and uniform color without excessive thickness.

[0035] In this embodiment, the pigment is white; in other embodiments, the pigment can be red or other colors.

[0036] In one embodiment of this method, the additive is a silicone-based additive. It is understood that silicone-based additives have better mixing properties and can help the pigment dissolve fully in the acrylic resin.

[0037] Specifically, in this embodiment, the content of each component of the primer layer 20 can be selected as follows: 73% acrylic resin, 15% polyurethane resin, 2% silicone additives, and 10% pigment white.

[0038] In one embodiment of this implementation, in order to protect the photosensitive layer 30, the molding method includes: S104: Forming a topcoat layer 40 on the photosensitive layer 30.

[0039] With this setup, the photosensitive layer 30 can be protected by the topcoat layer 40, ensuring that the color-changing function of the photosensitive layer 30 can be stably realized.

[0040] In one embodiment of this implementation, the topcoat layer 40, by weight, comprises 20-30 parts of polyurethane acrylate, 20-30 parts of modified epoxy resin, 3-6 parts of photoinitiator, 1-3 parts of leveling agent, 30-40 parts of reactive solvent, 0.3-1 parts of dispersant, and 5-12 parts of wax paste.

[0041] Understandably, polyurethane acrylate and modified epoxy resin serve as the main agents of topcoat layer 40, while the photoinitiator enables the liquid UV paint to instantly transform into a hard dry film. Leveling agents assist in the leveling of topcoat layer 40, ensuring a smooth surface and improving product appearance. Dispersants improve leveling, stably and uniformly dispersing solid powder particles in topcoat layer 40 into the liquid resin solution, preventing them from clumping together again and preventing the paint from hardening at the bottom after storage, making it difficult to stir. Wax paste provides richer and more unique color effects. Reactive solvents dilute and reduce viscosity to adjust the material properties of the final topcoat layer 40 to meet strength requirements.

[0042] In one embodiment of this implementation, the reactive solvent is butyl ester.

[0043] Specifically, the components in the topcoat layer 40 are as follows: 25% polyurethane acrylate, 25% modified epoxy resin, 4.5% photoinitiator, 2% leveling agent, 33% butyl ester, 0.5% dispersant, and 10% wax paste.

[0044] This invention provides a photosensitive color-changing device frame 100, which is manufactured using the molding method described in this invention. By employing the molding method of this invention, the device frame 100 can change color under ultraviolet light, thus offering a wider range of colors to meet consumer demand.

[0045] Specifically, the device frame 100 can be the frame of an electronic device such as a smartphone or tablet.

[0046] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.

Claims

1. A method for forming a frame of a photosensitive color-changing device, characterized in that, include: Provide mid-frame substrate; A primer layer is formed on the middle frame substrate; A photosensitive layer is formed on the primer layer, and the photosensitive layer can change color under ultraviolet light.

2. The molding method according to claim 1, characterized in that, The photosensitive layer, by weight, comprises 50-70 parts acrylic resin, 20-40 parts organic solvent, and 5-15 parts photosensitive color-changing powder.

3. The molding method according to claim 2, characterized in that, The organic solvent is butyl acetate.

4. The molding method according to claim 1, characterized in that, The provision of the mid-frame substrate includes: The middle frame substrate is ground, polished, and ultrasonically cleaned, and the surface of the middle frame substrate is wiped with a lint-free cloth.

5. The molding method according to claim 1, characterized in that, The primer layer, by weight, comprises 60-80 parts acrylic resin, 10-20 parts polyurethane resin, 1-5 parts additives, and 5-15 parts pigment.

6. The molding method according to claim 5, characterized in that, The additive is a silicone-based additive.

7. The molding method according to claim 1, characterized in that, The molding method includes: A topcoat layer is formed on the photosensitive layer.

8. The molding method according to claim 7, characterized in that, The topcoat layer, by weight, comprises 20-30 parts polyurethane acrylate, 20-30 parts modified epoxy resin, 3-6 parts photoinitiator, 1-3 parts leveling agent, 30-40 parts reactive solvent, 0.3-1 parts dispersant, and 5-12 parts wax paste.

9. The molding method according to claim 8, characterized in that, The reactive solvent is butyl ester.

10. A photosensitive color-changing device frame, characterized in that, It is prepared by the molding method described in any one of claims 1 to 9.

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