A textured film for in-mold injection molding

Abstract

The utility model provides a kind of texture film for in-mold injection molding, including sequentially layering from bottom to top ABS layer, high temperature barrier layer, printing layer and texture layer. Through four-layer composite structure design, the dual upgrade of touch and visual effect is realized, meet the use demand of high-end car interior part;Each layer thickness is accurately matched, while ensuring the stability of structure, the forming space requirement of in-mold injection is adapted, and the overall size precision of injection molding part will not be affected by excessive thickness;The design of each layer temperature resistance can resist the high temperature environment in the process of in-mold injection, avoid the deformation and failure of each layer structure due to high temperature, and ensure the integrated forming reliability of texture film and injection part;The concave-convex texture structure of 5-200 μm depth on the upper surface of texture layer can give the interior part rich touch quality, and the pattern color of printing layer can significantly improve the high-end performance of product appearance.

Description

Technical Field

[0001] This utility model relates to the field of textured film technology, specifically a textured film for in-mold injection molding. Background Technology

[0002] In-mold injection molding technology can achieve integrated molding of injection molded parts and surface film, which greatly improves the appearance and texture of products and production efficiency, and has been widely used in the manufacturing of automotive interior parts.

[0003] Existing surface films used for in-mold injection molding typically consist of a substrate layer, a printing ink layer, and a surface protective layer. Pattern and texture effects are achieved through the printing ink layer, but there is a lack of more advanced texture films that combine tactile and visual effects. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a textured film for in-mold injection molding.

[0005] To achieve the above objectives, the technical solution adopted by this utility model to solve its technical problem is: a textured film for in-mold injection molding, comprising an ABS layer, a high-temperature barrier layer, a printing layer and a textured layer stacked sequentially from bottom to top; The thickness of the ABS layer is 50-500μm, and the heat distortion temperature of the ABS layer is ≥180℃; The thickness of the high-temperature barrier layer is 10-25μm, and the high-temperature resistance temperature of the high-temperature barrier layer is ≥280℃; The thickness of the printed layer is 5-15μm, and the high temperature resistance of the printed layer is ≥250℃; The bottom layer of the texture layer has a thickness of 20-40μm, and the upper surface of the texture layer has a raised texture structure with a texture depth of 5-200μm.

[0006] This invention achieves a dual upgrade in tactile and visual effects through a four-layer composite structure design, meeting the needs of high-end automotive interior parts. The thickness of each layer is precisely matched to ensure structural stability while adapting to the molding space requirements of in-mold injection, preventing excessive thickness from affecting the overall dimensional accuracy of the injection molded part. The design of the ABS layer with a heat distortion temperature ≥180℃, the high temperature barrier layer with a high temperature resistance ≥280℃, and the printing layer with a high temperature resistance ≥250℃ can withstand the high temperature environment (usually 180-250℃) during the in-mold injection process, preventing deformation and failure of each layer due to high temperature, and ensuring the reliability of the integrated molding of the textured film and the injection molded part. The 5-200μm deep concave-convex texture structure on the upper surface of the textured layer can give the interior parts a rich tactile texture, which, combined with the pattern and color of the printing layer, significantly enhances the high-end appearance of the product.

[0007] Furthermore, the ABS layer is embedded with chopped glass fibers, the length of which is 0.1-0.3 mm.

[0008] Using the above-mentioned preferred solution, chopped glass fiber can significantly enhance the structural strength and high-temperature stability of the ABS layer, and the enhanced ABS layer has better compatibility with the injection molding substrates commonly used in automotive interior parts.

[0009] Furthermore, the high-temperature barrier layer is made of polyimide film.

[0010] Using the above-mentioned preferred scheme, the polyimide film possesses excellent high-temperature resistance and thermal insulation properties.

[0011] Furthermore, the textured structure is a frosted texture, a brushed texture, or a leather-like texture.

[0012] Using the above-mentioned preferred solutions, the frosted texture can bring a delicate and smooth touch, the brushed texture has a metallic visual effect, and the imitation leather texture presents a high-end and soft touch experience. The three texture types can meet the style requirements of different automotive interior parts.

[0013] Furthermore, the textured layer is made of UV-curable polyurethane acrylate resin.

[0014] Using the above-mentioned preferred solution, the UV-curable polyurethane acrylate resin has a fast curing speed and high hardness after molding, which can ensure that the textured structure of the textured layer is not easily deformed or worn after molding; the material has excellent wear resistance and scratch resistance, which can resist the touch and friction of automotive interior parts in daily use and maintain the integrity of the texture for a long time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a structural schematic diagram of one embodiment of the present invention.

[0017] The numbers and letters in the diagram represent the names of the corresponding components: 1-ABS layer; 2-High temperature barrier layer; 3-Printing layer; 4-Texture layer; 41-Antif texture structure. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1 As shown, a textured film for in-mold injection molding includes an ABS layer 1, a high-temperature barrier layer 2, a printing layer 3, and a textured layer 4 stacked sequentially from bottom to top. The thickness of ABS layer 1 is 50-500μm, and the heat distortion temperature of ABS layer 1 is ≥180℃; The thickness of the high-temperature barrier layer 2 is 10-25μm, and the high-temperature resistance temperature of the high-temperature barrier layer 2 is ≥280℃; The thickness of the printed layer 3 is 5-15μm, and the high temperature resistance of the printed layer 3 is ≥250℃; The bottom layer of texture layer 4 (the bottom layer refers to the part of the texture layer below the bump texture structure) has a thickness of 20-40μm, and the upper surface of texture layer 4 is provided with bump texture structure 41, the texture depth of bump texture structure 41 is 5-200μm.

[0020] The beneficial effects of adopting the above technical solution are as follows: Through the four-layer composite structure design, a dual upgrade in tactile and visual effects is achieved, meeting the usage requirements of high-end automotive interior parts; the thickness of each layer is precisely matched, ensuring structural stability while adapting to the molding space requirements of in-mold injection molding, and preventing excessive thickness from affecting the overall dimensional accuracy of the injection molded part; the design of the ABS layer with a heat distortion temperature ≥180℃, the high temperature barrier layer with a high temperature resistance ≥280℃, and the printing layer with a high temperature resistance ≥250℃ can withstand the high temperature environment (usually 180-250℃) during the in-mold injection molding process, avoiding deformation and failure of each layer structure due to high temperature, and ensuring the reliability of the integrated molding of the texture film and the injection molded part; the 5-200μm deep concave-convex texture structure on the upper surface of the texture layer can give the interior parts a rich tactile texture, which, combined with the pattern and color of the printing layer, significantly enhances the high-end appearance of the product.

[0021] In some other embodiments of this utility model, stubble glass fibers are embedded in the ABS layer 1, and the length of the stubble glass fibers is 0.1-0.3 mm.

[0022] Using the above-mentioned preferred solution, chopped glass fiber can significantly enhance the structural strength and high-temperature stability of the ABS layer, and the enhanced ABS layer has better compatibility with the injection molding substrates commonly used in automotive interior parts.

[0023] In some other embodiments of this invention, the high-temperature barrier layer 2 is made of polyimide film. The beneficial effects of using the above technical solution are: the polyimide film possesses excellent high-temperature resistance and heat insulation barrier effect.

[0024] In some other embodiments of this utility model, the textured structure 41 is a frosted texture, a brushed texture, or a faux leather texture. The beneficial effects of adopting the above technical solutions are: the frosted texture can bring a delicate and smooth touch, the brushed texture has a metallic visual effect, and the faux leather texture presents a high-end and soft touch experience. The three texture types can meet the style requirements of different automotive interior parts.

[0025] In some other embodiments of this utility model, the texture layer 4 is made of UV-curable polyurethane acrylate resin. The beneficial effects of adopting the above technical solution are: UV-curable polyurethane acrylate resin has a fast curing speed and high hardness after molding, which can ensure that the textured structure of the texture layer is not easily deformed or worn after molding; this material has excellent wear resistance and scratch resistance, which can resist the touch and friction of automotive interior parts in daily use and maintain the integrity of the texture for a long time.

[0026] The following describes a specific manufacturing process based on one embodiment of the present invention, with the steps as follows: 1. ABS layer preparation: High-temperature resistant modified ABS resin granules are selected, and short glass fibers with a length of 0.2 mm are added at 8 wt% of the total resin mass. The mixture is placed in a high-speed mixer and mixed evenly. The mixed material is added to an extrusion casting machine, and after extrusion, casting and cooling, an ABS layer with a thickness of 75 μm is formed. The heat distortion temperature of the formed ABS layer is tested to ensure that it is ≥180℃, and then it is ready for use.

[0027] 2. High-temperature barrier layer lamination: A 18μm thick polyimide film is selected as the high-temperature barrier layer. The upper and lower surfaces are first plasma-treated to improve surface adhesion. The treated polyimide film and ABS layer are then laminated together using a hot press laminating machine. The hot press temperature is set to 120℃, the hot press pressure to 8MPa, and the hot press time to 30s to ensure that the two layers are tightly bonded without bubbles or peeling, forming a composite preform of "ABS layer-high-temperature barrier layer".

[0028] 3. Preparation of printing layer: Select high-temperature resistant solvent-based ink and make a screen printing plate according to the preset pattern; use screen printing technology to print the pattern on the surface of the high-temperature barrier layer of the composite blank to form a printing layer with a wet film thickness of about 12μm; put the printed blank into a constant temperature oven and dry it at 80℃ for 30 minutes to allow the ink to fully cure.

[0029] 4. Texture layer preparation and texture molding: UV-curable polyurethane acrylate resin is selected and coated onto the surface of the printing layer using a doctor blade coating process to form a 30μm thick resin wet film. Immediately afterward, a precision embossing mold with an imitation leather texture is attached to the surface of the resin wet film. The embossing machine is started, and the embossing temperature is set to 100℃, the embossing pressure to 7MPa, and the embossing time to 20s, so that the texture on the mold is completely copied to the surface of the resin layer. Then, a UV curing lamp with a wavelength of 365nm is turned on and irradiated with a curing energy of 100mJ / cm² for 15s to completely cure the resin and obtain a texture layer with an imitation leather texture.

[0030] 5. Post-processing and finished product inspection: After UV curing, the imprinting mold and texture layer are separated by mechanical peeling to ensure that the texture structure is intact and undamaged; the texture film is trimmed to remove excess parts at the edges.

[0031] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A textured film for in-mold injection molding, characterized in that, It includes an ABS layer, a high-temperature barrier layer, a printing layer, and a textured layer, which are stacked sequentially from bottom to top. The thickness of the ABS layer is 50-500μm, and the heat distortion temperature of the ABS layer is ≥180℃; The thickness of the high-temperature barrier layer is 10-25μm, and the high-temperature resistance temperature of the high-temperature barrier layer is ≥280℃; The thickness of the printed layer is 5-15μm, and the high temperature resistance of the printed layer is ≥250℃; The bottom layer of the texture layer has a thickness of 20-40μm, and the upper surface of the texture layer has a raised texture structure with a texture depth of 5-200μm.

2. The textured film for in-mold injection molding according to claim 1, characterized in that, The ABS layer is embedded with chopped glass fibers, the length of which is 0.1-0.3 mm.

3. The textured film for in-mold injection molding according to claim 1, characterized in that, The high-temperature barrier layer is made of polyimide film.

4. The textured film for in-mold injection molding according to claim 1, characterized in that, The textured structure is a frosted texture, a brushed texture, or a leather-like texture.

5. The textured film for in-mold injection molding according to claim 1, characterized in that, The textured layer is made of UV-curable polyurethane acrylate resin.

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