CN102069674A - Decorative film, method of manufacturing decorative film, and method of manufacturing decorative molded article - Google Patents

Abstract

The present invention provides a decorative film, a method for manufacturing the decorative film and a method for manufacturing a decorative molded object. The decorative film comprises a carrier layer, a release layer and a protective layer. The release layer is disposed on the carrier layer, and the side of the release layer away from the carrier layer has a concave-convex surface.

Description

Decorative film, method of manufacturing decorative film, and method of manufacturing decorative molded article

technical field

The present invention relates to a decorative film, a method for manufacturing a decorative film, and a method for manufacturing a decorative molding, and in particular to a decorative film with a release layer having a concave-convex surface, a manufacturing method for the decorative film, and a manufacturing method for a decorative molding .

Background technique

With the trend of miniaturization and thinning of electronic products, the general public has regarded many portable products, such as notebook computers, personal mobile assistants, mobile phones, etc., as devices for daily needs. In addition to physical functional requirements, appearance design is also an important factor for buyers to consider.

Traditionally, if one wants to draw or decorate on a plastic casing, it mainly uses spraying or printing to apply patterns on the surface of the casing to present various patterns or colors. However, it is necessary to repeatedly use masking paint or masking sheet to form the area to be sprayed during spraying and then spray with various paints. Such steps are quite time-consuming and complicated, which is not conducive to industrial large-scale manufacturing. In addition, the traditional spraying process produces a large amount of spray containing lead or other heavy metals, which not only causes waste of paint, but also causes serious environmental pollution. When spraying hardened paint or anti-scratch paint, it is easy to cause uneven surface thickness due to the difference in the amount of spraying in different areas, especially when dealing with curved positions, often resulting in material accumulation.

In order to solve the aforementioned problems, the industry has developed a forming technology of In Mold Decoration (IMD), in which the process of In Mold Roller (IMR) is to transfer a decorative layer with a protective layer structure. The patterned film is placed in a mold for injection molding. The hot-melt resin (or plastic) is injected on one side of the formed film by means of injection molding, so that the hot-melt resin and the film are combined into one. After the film with decorative pattern is pasted on the shaped plastic part formed by the hot-melt resin, the carrier film with release effect is torn off to expose the protective layer. In this way, the process of in-mold transfer printing is completed. Generally speaking, the protective layer exposed on the outermost layer is a smooth plane, which imparts a certain gloss to the surface.

With the diversification of consumers' usage habits, electronic products with patterned and textured surfaces are also in demand in the market. If you want to use in-mold decoration technology to produce tactile patterns on the surface of the product, the more common method is to use a forming mold with corresponding pattern patterns, such as Japanese Patent Application No. 9-267357, Japanese Patent Application No. 2001-179922, and Japanese Patent Application No. -231150, Special Opening No. 2005-36168, etc. However, this type of forming mold is expensive and can only be used for a single pattern pattern. If different pattern patterns need to be produced, another mold must be opened, which increases the production cost.

In addition, when the user touches the smooth protective layer, the oil produced by the skin is easy to attach fingerprints on the smooth surface, which affects the overall appearance. In order to produce a low-gloss effect on the surface of the protective layer, a variety of transfer films with matting ability have been developed in recent years. For example, JP-A-2001-30405, JP-A-2001-179922, JP-A-2005-36168, etc. disclose a variety of decorative films with a matte feel, mainly adding matting particles into the protective layer, scattering light through the particles, and Create a rough effect on the surface of the protective layer to achieve a matte texture. However, during the processing, the added matting particles may settle in the protective layer, resulting in uneven distribution of the matting particles on the surface. In addition, there is also a release layer in which the matting particles are added to the decorative film. Since the general release layer contains silicone resin (Silicone), its compatibility with the matting particles is not good, resulting in the separation of the organic phase and the inorganic phase on the surface of the dry film, which may also cause uneven distribution of the matting particles.

Contents of the invention

The purpose of the present invention is to provide a decorative film that can achieve foggy visual effect or rough touch without the above-mentioned defects in the prior art, and can form a release layer and a protective layer with a concave-convex surface.

Another object of the present invention is to provide a method for manufacturing a decorative film to manufacture a decorative film with a concave-convex surface.

Another object of the present invention is to provide a method for manufacturing a decorated molded article, the decorative film has a concave-convex surface so that the decorated molded article has a foggy visual effect or a rough touch.

The invention provides a decorative film, which includes a bearing layer and a release layer. The release layer is arranged on the carrying layer, and one side of the release layer has a concave-convex surface.

The present invention also proposes a method for manufacturing a decorative film, which includes the following steps: forming a semi-hard release material on a carrier layer, and forming a concave-convex surface on the side of the semi-hard release material away from the carrier layer to form a A release layer.

The present invention further proposes a method for manufacturing a decorative molding, which includes the following steps: providing a decorative film as described above. A pattern layer is formed on the side of the protective layer away from the release layer. An adhesive layer is formed on one side of the protection layer. Form a substrate tightly attached to the adhesive layer.

Based on the above, the present invention adopts different processing methods to make the release layer have a concave-convex surface, so the protective layer conforming to the release layer can have a concave-convex structure to achieve a foggy visual effect or a rough touch.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the low-gloss surface decoration film of the present invention.

Fig. 2 is a schematic cross-sectional view of peeling off the release layer from the protective layer of an embodiment of the low-gloss surface decoration film of the present invention.

Fig. 3 is a schematic cross-sectional view of the embodiment of the low-gloss surface decoration film of the present invention having partial fogging.

Fig. 4 is a schematic cross-sectional structural view of an embodiment of an atomized layer with different thicknesses of the low-gloss surface decoration film of the present invention.

Fig. 5 is a schematic cross-sectional view of an embodiment of a low-gloss surface decoration film without a protective layer of the present invention.

Fig. 6 is a schematic cross-sectional view of peeling off the release layer from the protective layer in an embodiment of the low-gloss surface decoration film of the present invention without a protective layer.

Fig. 7 is a schematic cross-sectional view of the structure of the low-gloss surface decoration film without a protective layer with different thicknesses of the atomized layer.

Fig. 8-1 to Fig. 8-7 are schematic diagrams of step processing according to an embodiment of the present invention.

9-1 and 9-2 are schematic cross-sectional views of an embodiment of the decorative film of the present invention.

10-1 and 10-2 are schematic cross-sectional structural views of another embodiment of the decorative film of the present invention.

11-1 and 11-2 are schematic cross-sectional views of another embodiment of the decorative film of the present invention.

Wherein, the reference signs are explained as follows:

1011A, 1012A, 1013A: Flat surface

11, 811, 911, 1011: bearing layer

12: atomized layer

121: atomized particles

122: Atomized surface

13, 812, 812a, 912, 1012: release layer

131: Second concave-convex surface structure

14, 813, 913, 1013: protective layer

141: First concave-convex surface structure

15, 814, 914, 1014: pattern layer

16, 815, 915, 1015: Adhesive layer

17: masking layer

20, 820: Substrate

8121: Pressure Surface

8122: pattern structure

8131: transfer structure

830: scroll wheel

835: Microstructure pattern

912A, 1011B, 1012B, 1013B: first concave-convex surface

912B, 1011C, 1012C, 1013C: second concave-convex surface

h1: first thickness

h2: second thickness

h81: Depth

h82: Thickness

H91, H92, H101, H102: Height

Detailed ways

Embodiments of the present invention provide a decorative film and a decorative molded product thereof. The manufacturing and usage methods of each embodiment are described in detail below and illustrated with accompanying drawings. Wherein, the same reference numeral elements used in the drawings and the specification represent the same or similar elements. In the accompanying drawings, for the sake of clarity and convenience of illustration, the shapes and thicknesses of the embodiments may be unrealistic. The content described below is specifically for the various elements of the device of the present invention or its integration. However, the above-mentioned elements are not limited to those shown or described herein, but can be known by those familiar with the technology Various forms, moreover, when a layer of material is on top of another layer of material or substrate, it may be directly on its surface or additionally interposed with other intervening layers.

Please refer to Fig. 1, which is a schematic cross-sectional view of an embodiment of the present invention, as shown in the figure: this embodiment provides a low-gloss surface decoration film, which transfers patterns or characters to a printing substrate 20 by embossing means surface. This low-gloss surface decoration film can be applied, for example, to in-mold labeling (In Mold Labeling; IML, also known as In Mold Film/Forming; IMF or in-mold lamination (In Mold Lamination; IML) or in-mold In Mold Decoration (IMD) process such as In Mold Roller (IMR), heat transfer printing (Heat Transfer Printing) process, sublimation heat transfer process, heat stamping cover/hot stamping (Hot Stamping) process, jet printing (Ink-Jet Printing) process or water transfer printing (Water Transfer Printing) process, to form a decorative molded product with a low gloss surface with plastic materials. In one embodiment, the substrate 20 A variety of materials can be applied, such as polycarbonate (polycarbonate, PC), ABS (acrylonitrile butadiene styrene, ABS) resin, polymethylmethacrylate (polymethylmethacrylate, PMMA), polyacetal (polyoxymethylene, POM), polypara Butylene terephthalate (polybutylene terephthalate, PBT), polypropylene (polypropylene, PP), acrylic (polymethylmethacrylate, PMMA), styrene methyl methacrylate copolymer (MMA-St, MS), acrylonitrile - Butadiene-styrene (acrylonitrile butadiene styrene, ABS), polystyrene (polystyrene, PS), polyethylene terephthalate (polyethylene terephthalate, PET) or polyacetal (polyoxymethylene, POM) or its combination, but not limited to.

In this embodiment, the transfer film is disposed on the substrate 20 , and the decorative film is formed by stacking a multi-layer film structure, including an atomized layer 12 , a release layer 13 and a protective layer 14 . The atomized layer 12 includes a plurality of atomized particles 121 fixed in the atomized layer 12. The atomized layer 12 has an atomized surface 122. The atomized surface 122 forms a plurality of depressions and protrusions according to the distribution of the atomized grains 121. structure. The thickness of the atomized layer 12 is between 1 μm and 30 μm. The above-mentioned protective layer 14 can be provided on one side of the atomized surface 122 of the atomized layer 12 by coating or printing to provide scratch-resistant and wear-resistant effects. The first concave-convex surface structure 141 . In order to make the atomized layer 12 separate from the protective layer 14 smoothly, a release layer 13 is provided between the atomized layer 12 and the protective layer 14 . The release layer 13 can be formed between the atomized layer 12 and the protective layer 14 by coating or printing, so that the release layer 13 is separated from the protective layer 14 together with the atomized layer 12 after being subjected to a peeling force, as shown in Figure 2 shown. In addition, the release layer 13 is substantially conformal to the atomization layer 12 and has a concave-convex surface, so the side of the protective layer 14 close to the release layer 13 may have a first concave-convex surface structure 141 .

In addition, if it is desired to make the protective layer 14 have a partial matte effect, a masking layer 17 can be formed on the atomized surface 122 of the partial atomized layer 12 by gravure printing or screen printing, as shown in Figure 3 shown. In this way, the surface of the protective layer 14 corresponding to the shielding layer 17 has a substantially flat structure, thereby achieving the effect of a partially fogged surface. The shielding layer 17 can be polyurethane (PU), acrylic, epoxy or polyester.

In one embodiment, the material of the mist layer 12 may be polyurethane, acrylic epoxy or polyester or a combination thereof. Atomized particle 121 can be silicon dioxide (silicon dioxide), calcium carbonate (calcium carbonate), calcium sulfate (calcium sulfate), barium sulfate (Barium sulfate), aluminum oxide (aluminum oxide), titanium oxide (titanium oxide) etc., Or metal powder, inorganic pigment or organic pigment, etc. And its forming form can be hollow sphere, non-film-forming latexes or dispersions (non-film-forming latexes or dispersions). The particle size of the atomized particles 121 is between 0.1 μm and 30 μm, especially preferably between 1 μm and 15 μm. Since the formation of the first concave-convex surface structure 141 on the protective layer 14 will be affected by the height difference between the depression and the protrusion of the atomized layer 12, and because the protective layer 14 and the atomized layer 12 are not in direct contact with each other, but through The release layer 13 transfers the undulations on the atomized surface 122 of the atomized layer 12 to the protection layer 14 to form a first concave-convex surface structure 141 . Therefore, the thickness of the release layer 13 will also affect the degree of undulation of the first concave-convex surface structure 141 of the protective layer 14 . In this embodiment, the thickness of the release layer 13 is between 1-10 μm.

In order to be applicable to the IMR process, the atomized layer 12 is arranged on a carrier layer 11 with the other side corresponding to the atomized surface 122, and the atomized layer 12 can be formed on the carrier layer 11 by means of gravure printing or coating. , in which gravure printing can be carried out by roll printing or embossing method. The carrier layer 11 can be polyethylene terephthalate (polyethylene terephthalate, PET), polyethylene naphthalate (polyethylene naphthalate, PEN), glycol-modified polyethylene terephthalate (polyethylene terephthalate- co-cyclohexane-1, 4dimethanol terephthalate, PETG), thermoplastic polyurethane (thermalplastic polyurethane, TPU), polyurethane, polypropylene, polycarbonate, amorphous polyethylene terephthalate (amorphous polyethylene terephthalate , A-PET), polyvinyl chloride (polyvinyl chloride, PVC), triacetyl cellulose (TAC), acrylic, styrene methyl methacrylate copolymer or cyclic olefin polymer and other polymers material, or may be composed of multiple polymer materials mentioned above.

The material of the protective layer 14 can be radiation curable polyfunctional acrylate, epoxy, vinyl ester (vinyl ester resins), diallyl phthalate (diallyo (o-) phthalate), vinyl ether ( vinyl ether), or mixtures thereof. The above-mentioned radiation curable multifunctional acrylate may be epoxy acrylate, polyurethane acrylate, polyester acrylate, silicone acrylate, or glycidyl acrylate and the like. Since the protection layer 14 is a thermosetting resin, a corresponding structure can be formed according to the shape of the molding surface. In another embodiment, the atomized layer 12 has a rough atomized surface 122 due to the addition of atomized particles 121. Therefore, the release layer 13 and the protective layer 14 above the atomized surface 122 all follow the atomization process. The undulations of the surface 122 form a rough surface. The other side of the first concave-convex surface structure 141 corresponding to the protective layer 14 can have a pattern layer 15 containing patterns or characters; wherein, the pattern layer 15 can be a sublimation transfer ink, a hot-melt transfer ink or a UV-type transfer ink. Transfer ink, etc. The other side of the pattern layer 15 corresponding to the protective layer 14 can have an adhesive layer 16 adhered to the substrate 20, the adhesive layer 16 can be hot melt adhesive, UV adhesive, photoactivated adhesive, electron beam activated adhesive, etc. .

Different regions of the atomized layer 12 on the same plane may have a uniform thickness as in the foregoing embodiments, or may also have at least two different thicknesses. Please refer to FIG. 4 , which is a schematic cross-sectional structure diagram of an embodiment of a low-gloss surface decoration film having two atomized layers with different thicknesses according to the present invention. In this embodiment, the atomized layer 12 includes a first thickness h1 and a second thickness h2, wherein the first thickness h1 is greater than the second thickness h2. From the cross-sectional view, the atomized layer 12 has different thicknesses, so that the protection layer 14 has different depths to the first concave-convex surface structure 141 on the side of the fog layer 12 . In this way, the surface of the protective layer 14 can provide different light wavelength shift directions, so as to achieve the effect of gloss gradient. The aforementioned atomized layer 12 having the first thickness h1 and the second thickness h2 can be printed on the carrying layer 11 by means of gravure printing, such as different patterns on a flat mold or a cylindrical mold, so that the printed mist The atomized layer 12 has different patterns; or, the atomized layer 12 with different thicknesses can use a gravure plate with at least two different plate depths to print on the carrier layer 11, and the atomized layer 12 with different thicknesses can be formed , the release layer 13 or protective layer 14 formed on the atomized layer 12 subsequently can form corresponding structures with different thicknesses according to the shape of the surface of the atomized layer 12 . Through different thickness differences, the surface of the release layer 13 or the protective layer 14 presents the effect of different glossiness of the gradient.

Please refer to Figure 5, which is a schematic cross-sectional view of another embodiment of the present invention, as shown in the figure: the present invention can also be applied to a decorative film without a protective layer, that is, the release layer 13 is directly arranged on the pattern layer 15 on. In this embodiment, the release layer 13 is arranged on one side of the atomized layer 12, so that the atomized particles 121 form a corresponding second concave-convex surface structure 131 on the surface of the release layer 13, and the atomized layer 12 is separated from the release layer 13 after receiving a peeling force, as shown in FIG. 6 . After the atomized layer 12 is peeled off, the second concave-convex surface structure 131 presents height differences, so that the surface of the decorative film without a protective layer can also form a concave-convex surface structure. In this embodiment, the atomized layer 12 may also have at least two different thicknesses in different regions, as shown in FIG. 7 . The second concave-convex surface structure 131 on the side of the release layer 13 opposite to the atomized layer 12 has different depths. In this way, the surface of the release layer 13 can also provide different light wavelength shift directions, so as to achieve the effect of gloss gradient.

The above-mentioned low-gloss surface decoration film is combined with a substrate 20 to form a variety of decorative moldings, which can be a mobile phone casing, a digital camera casing, a personal data assistant casing, a notebook computer casing, a desktop Computer casing, touch panel casing, TV casing, global positioning system casing, car display casing, aviation display casing, digital photo frame casing, or portable DVD player casing, cosmetic casing, toy casing, car dashboard, Clock casings, radio casings, watch casings, credit or smart cards, etc., but not limited thereto.

About the specific implementation method of the present invention by adjusting the ratio of atomized particles in the atomized layer, or utilizing the thickness of the adjusted release layer to control the surface gloss value of the protective layer or the release layer, the details are as follows:

Embodiment one:

In this embodiment, according to adding different proportions of atomized particles in the atomized layer, the surface gloss value of the protective layer or the release layer is adjusted.

First, 4 μm atomized particles are added to the atomized layer at a ratio of 2.5%, 15% and 30%, respectively, and then the release layer, protective layer, pattern layer and adhesive layer are coated, and transferred through the complete IMR process On the substrate, the release layer and the atomized layer are finally separated from the surface of the protective layer. Use NOVO-GLOSS TRIO photometer (RHOPHOINT INSTRUMENTS) to measure the surface gloss of these protective layers at a measurement angle of 60 degrees. The measured results are shown in the following table:

Add particle size Add particle ratio 60 degree gloss value 4μm 2.5% 50 4μm 15% 13 4μm 30% 3

It can be seen from the results in the above table that the 60 degree gloss value will decrease with the increase of the proportion of added particles, that is to say, when the proportion of added particles is higher, the glossiness of the surface of the protective layer will be lower.

Embodiment two:

In this embodiment, the surface gloss value of the protective layer is adjusted according to the thickness of the release layer.

First, add 4 μm atomized particles to the atomized layer at a ratio of 15%. The coating thickness of the atomized layer is 3 μm, and apply release layers with a thickness of 2 μm, 6 μm, and 8 μm on the atomized layer. , followed by coating a protective layer, a pattern layer and an adhesive layer, which are transferred to the substrate through a complete IMR process, and finally the release layer and the atomized layer are separated on the surface of the protective layer. Finally, the NOVO-GLOSS TRIO photometer (RHOPHOINT INSTRUMENTS) was also used to measure the surface gloss of these protective layers at a measurement angle of 60 degrees. The measured results are shown in the following table:

Add particle size Release layer thickness 60 degree gloss value 4μm 2μm 17 4μm 6μm 73 4μm 8μm 78

No addition 2μm 80

It can be seen from the results in the above table that the 60-degree gloss value will increase with the increase of the thickness of the release layer, that is to say, when the thickness of the release layer between the atomized layer and the protective layer is thicker, the protective layer has Higher surface gloss.

The manufacturing method of the atomized layer and its related design described above are only a method to realize the concave-convex surface formed by the release layer or the protective layer in the decorative film. However, the present invention is not limited to use this method (arrangement of the atomized layer) to form a protective layer with a concave-convex surface or a decorative molding with a rough surface. Therefore, other embodiments will be illustrated below to fully illustrate the spirit of the present invention.

First, as shown in FIG. 8-1 , half of the hard release layer 812 is coated on a carrier layer 811 , and the release layer 812 has a pressure-receiving surface 8121 . The material of the carrying layer 811 can refer to the materials described in the above embodiments, but is not limited thereto.

After the semi-hard release layer 812 is coated on the carrier layer 11, as shown in FIG. Press the surface 8121 so that the microstructure pattern 835 on the roller 830 is transferred to the position of the pressed surface 8121 corresponding to the pressing force to form a pattern structure 8122 . In the present invention, in addition to using the roller imprinting process as in this embodiment, a flat plate imprinting process can also be used to provide the imprinting force. That is to say, the roller 830 is just an example for illustration. In other embodiments, the imprinting force can be applied to the pressing surface 8121 by a flat plate or other tools. In addition, the microstructure pattern 835 on the roller 830 can be formed by, for example, sandblasting, etching, laser engraving and the like.

In order to make the decorative molded article have a special touch, the depth h81 of the pattern structure 8122 produced after the pressing surface 8121 is subjected to the embossing force is at least 10 μm. In one embodiment, the depth h81 of the pattern structure 8122 is between 10 μm and 40 μm. However, the present invention is not limited thereto. In other embodiments, the depth h81 of the pattern structure 8122 may also be less than 10 μm, so as to achieve the visual effect of fogging. In addition, the minimum thickness h82 of the release layer 812 is at least 1 μm, that is to say, the release layer 812 is continuously coated on the carrier layer 811, and the carrier layer 811 will not be exposed to facilitate subsequent release. When the layer 812 exerts a peeling force, the release layer 812 can be separated from the bearing layer 811 smoothly. Furthermore, after the pattern structure 8122 is produced, the semi-hard release layer 812 is cured, so that the pattern structure 8122 is fixed on the pressure receiving surface 8121 . The semi-hard release layer 812 can be transformed into a solidified release layer 812a by means of radiation or heating, as shown in FIG. 8-3 . It is worth mentioning that the pattern structure 8122 can be locally distributed on the release layer 812a to form a partially flat and partially rough shape.

Referring to FIG. 8-4 again, a protective layer 813 is covered on the cured release layer 812a. Wherein, the material of the protection layer 813 can refer to the materials described in the above embodiments, but is not limited thereto. Since the protective layer 813 is a plastic resin, it can form a corresponding structure according to the shape of the covered surface. Therefore, the protective layer 813 forms a transition corresponding to the pattern structure 8122 relative to the pressure surface 8121 of the release layer 812a. Print structure 8131. In an embodiment, the protection layer 813 may also be a relief structure conformal to the pressure surface 8121 .

In order to increase the color or pattern performance of the decorative film, as shown in Figure 8-5, after the protective layer 813 is covered on the cured release layer 812a, the other side of the protective layer 813 relative to the transfer structure 8131 is further A pattern layer 814 and an adhesive layer 815 are formed. The pattern layer 814 can be formed on the protective layer 813 by screen printing, gravure printing or ink-jet printing. The pattern layer 814 can be sublimation transfer ink, hot melt transfer ink or UV transfer ink, etc., and the adhesive layer 815 can be hot melt adhesive, UV adhesive, photoactivated adhesive, electron beam activated adhesive, etc. Wherein, the position of the pattern layer 814 may correspond to the area of the transfer structure 8131 , or not completely correspond to the area of the transfer structure 8131 . According to this embodiment, the pattern layer 814 is provided in a region corresponding to the transfer structure 8131 , thus forming a partial pattern layer 814 . At this time, an adhesive layer 815 may be filled between the pattern layers 814 (that is, flat areas).

Please refer to Fig. 8-6, after the pattern layer 814 and the adhesive layer 815 are formed, a plastic material is arranged on the other side of the adhesive layer 815 which is connected to the pattern layer 814, and a plastic material is formed after the plastic material hardens. The substrate 820 tightly attached to the adhesive layer 815 . The plastic material can be disposed on the adhesive layer 815 by injection molding, thermocompression molding, compression molding, blow molding or extrusion molding, that is to say, the above-mentioned support layer 811, release layer 812a, protective The decorative film composed of the layer 813 , the pattern layer 814 and the adhesive layer 815 is attached to the printing substrate 820 formed by hardening plastic material. In another embodiment, the above-mentioned decorative film can be placed on a substrate 820 . Then pressurize and heat to make the decorative film tightly connected to the substrate 820 through the adhesive layer 815 (this is a thermal transfer printing process, and the decorative film is coated on an outer surface such as plastic or metal by thermal transfer. ).

Plastic materials here can be polycarbonate, polypropylene, acrylic, styrene methyl methacrylate copolymer, acrylonitrile-butadiene-styrene polystyrene, polyethylene terephthalate or polyacetal, but not limited thereto.

Finally, as shown in Figure 8-7, after the aforementioned completed decorative film is closely attached to the substrate 820, the release layer 812a and the bearing layer 811 disposed on the release layer 812a can be removed by a peeling force. detached from the protective layer 813 . That is to say, the protection layer 813 is exposed on the outermost layer, so that the transfer structure 8131 on the protection layer 813 can be touched by the user. The protective layer 813 has a concave-convex structure corresponding to the release layer 812a, so the protective layer 813 can provide a rough touch or a foggy visual effect on the surface of the substrate 820 .

In addition, in addition to forming a single-depth recessed structure on the release layer, the present invention can also form recessed structures with different depths on the release layer, as shown in Figure 9-1. This embodiment is on the bearing layer 911 After the release layer 912 is formed, the first concave-convex surface 912A and the second concave-convex surface 912B are formed on the release layer 912 by means of mechanical pressure such as embossing. After that, a protection layer 913 , a pattern layer 914 and an adhesive layer 915 are formed on the release layer 912 to complete the decoration film.

It can be seen from the figure that, for example, the protection layer 913 has an undulating structure along with the first concave-convex surface 912A and the second concave-convex surface 912B. Therefore, when the decorative film of this embodiment is used to make a decorative molded article, after the release layer 912 and the bearing layer 911 are peeled off from the protective layer 913, the protective layer 913 can maintain a concave-convex structure to achieve a foggy visual effect or Rough to the touch.

In this embodiment, the first concave-convex surface 912A is relatively protruded from the second concave-convex surface 912B. That is, the height H91 of the first concave-convex surface 912A is greater than the height H92 of the second concave-convex surface 912B. Specifically, in order to realize concave designs of different depths, this embodiment can use laser engraving, etching, or sandblasting to form different depths on the tools used in the imprinting process, such as rollers, relief plates, etc. concave-convex structure. Then, using these tools to carry out the imprinting process can form the first concave-convex surface 912A and the second concave-convex surface 912B with different heights according to different design requirements.

In this embodiment, the heights of the first concave-convex surface 912A and the second concave-convex surface 912B are different. Therefore, when the decorative film of this embodiment is used to make a decorative molded object, the first concave-convex surface 912A and the second concave-convex surface 912B can provide different reflection effects and help to make the surface of the decorated molded object have a visual effect of gradation . In addition, different concave depth designs can also make the pattern design of the decorative molding more flexible. For example, a structure with a large degree of depression can cause a more obvious rough touch, while a structure with a small degree of depression can provide a significant atomization effect, and designs with different depths of depression can provide a gradient visual effect. Therefore, the designer can make various concave-convex surfaces with different concave depths on the decorative molding according to his needs.

In another embodiment, as shown in FIG. 9-2, the pattern layer 914 can be directly formed on the release layer 912, wherein the pattern layer 914 is in contact with the side of the release layer 912 along with the first concave-convex surface 912A and The second concave-convex surface 912B has a concave-convex structure. Therefore, when the decorative film shown in Figure 9-2 is used to make decorative moldings, it can also achieve matte visual effects, gradient visual effects and rough touch.

Furthermore, in order to make the surface of the decorated molding have a rough touch or a foggy visual effect, the decorative film can also have other designs.

For example, the decorative film shown in FIG. 10-1 includes a carrier layer 1011 , a release layer 1012 , a pattern layer 1014 and an adhesive layer 1015 . The materials of these film layers can be selected with reference to the content described in the foregoing embodiments, and will not be repeated here. It is worth mentioning that the carrying layer 1011 of this embodiment itself has a flat portion 1011A, a first concave-convex structure 1011B, and a second concave-convex structure 1011C.

A method of forming the flat portion 1011A, the first concave-convex structure 1011B, and the second concave-convex structure 1011C on the carrying layer 1011 is, for example, directly applying an embossing force on the carrying layer 1011 to form the desired structure. That is to say, in this embodiment, the bearing layer 1011 having a concave-convex surface can be formed by an embossing process. Following the above-mentioned embossing process, this embodiment can be used to manufacture the bearing layer 1011 with a specific surface structure by forming concave-convex patterns with different depths on the tool.

In this embodiment, the second concave-convex structure 1011C is relatively protruded from the flat portion 1011A and the first concave-convex structure 1011B, but the relative heights of these structures are only for illustration. In other embodiments, the height of these structures can be changed according to different requirements, but the present invention is not particularly limited to this condition.

Fig. 10-2 shows the state in which the bearing layer 1011 is separated from the release layer 1012 in the decorative film of this embodiment. Since the carrying layer 1011 has a flat portion 1011A, a first concave-convex structure 1011B, and a second concave-convex structure 1011C, the release layer 1012 also has corresponding undulations according to the structure of the carrying layer 1011 . Therefore, the release layer 1012 may have a flat surface 1012A, a first concave-convex surface 1012B, and a second concave-convex surface 1012C.

In this embodiment, the heights of the release layer 1012 on the first concave-convex surface 1012B and the second concave-convex surface 1012C are respectively heights H101 and H102, wherein the height H101 is greater than the height H102. With such a design, the decorative molding made of the decorative film of this embodiment can have a matte visual effect, a gradient visual effect and a rough touch through the first concave-convex surface 1012B and the second concave-convex surface 1012C. In addition, the flat surface 1012A can also provide a smooth visual effect and tactile feeling in a local area.

The above-mentioned embodiment is described by taking the pattern layer 1014 directly formed on the release layer 1012, and the release layer 1012 will remain on the surface of the decorative molding. In other embodiments, as shown in FIG. 11-1 , the decorative film can be designed with a protective layer 1013 between the release layer 1012 and the pattern layer 1014 . At this time, after the decorative film is used to make a decorative molding, the release layer 1012 can be peeled off from the protective layer 1013, as shown in FIG. 11-2, so that the protective layer 1013 becomes the outermost layer of the decorative molding.

It is worth mentioning that after the protective layer 1013 is formed on the release layer 1012, it will have an undulating structure along with the surface it covers, so the protective layer 1013 also has a flat surface 1013A, a first concave-convex surface 1013B, and a second concave-convex surface 1013C . Once the protective layer 1013 becomes the outermost layer of the decorative molding, the protective layer 1013 can provide a partially smooth and partially matte visual effect, a gradient visual effect or a rough touch in the decorative molding.

In summary, since the manufacturing method of the decorative film of the present invention is mainly to form a pattern structure by applying an embossing force on the release layer or the carrier layer or to make the release layer have a concave-convex surface by setting the atomized layer . Therefore, the protective layer produces a transfer structure corresponding to the concave-convex surface. Since the transfer structure is composed of multiple three-dimensional depressions and protrusions, the user will have a completely different touch than the traditional smooth surface when touching it, or visually feel the effect of fog or gradient. That is to say, compared with the flat surface of the traditional in-mold decoration, the decoration film manufactured by the embodiment of the present invention can produce a concave or raised tactile feeling on the surface of the decoration. Furthermore, the transfer printing structure can also be matched with pattern design to imitate the real surface of the image and the texture of a specific image to produce a unique effect of simulation. For example, the above-mentioned transfer structure may be a hairline. In addition, a metal material can be further vapor-deposited or sputtered on the pattern layer, so that the surface of the decorative object not only produces a metallic hairline effect visually, but also has a tactile feeling that simulates real hairlines when touching the hairlines. In addition, the atomized particles added in the atomized layer do not need to be settled and unevenly distributed due to the selection of larger particle sizes, so the atomized particles can be evenly distributed in the atomized layer. That is to say, the manufacturing method of the decorative film of the present invention has an ideal process yield.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention should be based on the scope defined by the appended claims.

Claims (34)

1. A decorative film, comprising: a carrier layer; and A release layer is arranged on the carrying layer, and one side of the release layer has a concave-convex surface. 2. The decorative film according to claim 1, wherein the decorative film further comprises an atomized layer, the atomized layer is arranged between the bearing layer and the release layer, wherein the atomized layer comprises a plurality of The atomized particles in the atomized layer, and the distribution of the plurality of atomized particles forms an atomized surface composed of a plurality of depressions and protrusions, and the release layer conforms to the atomized surface to have The bumpy surface. 3. The decorative film according to claim 2, wherein the decorative film further comprises a masking layer, the masking layer is configured on a partial area of the atomized surface, and is located in a partial area of the release layer and the atomized layer Between, so that the part of the release layer corresponding to the shielding layer has a flat structure. 4. The decorative film as claimed in claim 2, wherein the atomized layer is made of polyurethane, acrylic, epoxy or polyester. 5. The decorative film as claimed in claim 2, wherein the thickness of the atomized layer is between 1 μm and 30 μm. 6. The decorative film as claimed in claim 2, wherein the particle size of the plurality of atomized particles is between 0.1 μm and 30 μm. 7. The decorative film according to claim 2, wherein the material of the plurality of atomized particles is silicon dioxide, calcium carbonate, calcium sulfate, barium sulfate, aluminum oxide or titanium oxide. 8. The decorative film as claimed in claim 2, wherein the plurality of atomized particles are hollow spheres, non-membrane latex or dispersion, metal powder, inorganic pigments or organic pigments. 9. The decorative film as claimed in claim 1, wherein the bearing layer has a pattern structure, and the release layer conforms to the pattern structure to have the concave-convex surface. 10. The decorative film as claimed in claim 9, wherein the depth of the depressions of the pattern structure is at least 10 μm. 11. The decorative film as claimed in claim 9, wherein the pattern structure has different recess depths. 12. The decorative film as claimed in claim 1, wherein a side of the release layer adjacent to the carrying layer has a flat surface, and the flat surface and the concave-convex surface are opposite to each other. 13. The decorative film as claimed in claim 1, wherein the concave-convex surface has a concave depth of at least 10 μm. 14. The decorative film as claimed in claim 1, wherein the concave-convex surface has different concave depths, and the thickness of the release layer is at least 1 μm. 15. The decorative film as claimed in claim 1, wherein the decorative film further comprises a protective layer, the protective layer is configured on the release layer, and the protective layer conforms to the release layer having the concave-convex surface side. 16. The decorative film as claimed in claim 15, wherein the material of the protective layer is radiation curable polyfunctional acrylate, epoxy, vinyl ester, diallyl phthalic acid, vinyl acid, or mixture. 17. The decorative film of claim 16, wherein the radiation curable multifunctional acrylate is epoxy acrylate, polyurethane acrylate, polyester acrylate, silicone acrylate, or glycidyl acrylate . 18. The decorative film as claimed in claim 1, wherein the decorative film further comprises a pattern layer disposed on the release layer. 19. The decorative film as claimed in claim 1, wherein the material of the bearing layer is polyethylene terephthalate, polyethylene glycol phthalate, glycol denatured polyethylene terephthalate, thermoplastic polyester Urethane, polyurethane, polypropylene, polycarbonate, amorphous polyethylene terephthalate, polyvinyl chloride, cellulose triestate, acrylic, styrene methyl methacrylate copolymer , a cyclic olefin polymer, or a combination of the above. 20. A method of manufacturing a decorative film, comprising: A half-hard release material is formed on a bearing layer, and a concave-convex surface is formed on the side of the semi-hard release material away from the bearing layer to form a release layer. 21. The manufacturing method of the decorative film as claimed in claim 20, further comprising forming a protective layer on the side of the release layer having the concave-convex surface. 22. The method for manufacturing a decorative film as claimed in claim 20, wherein the method for forming the concave-convex surface on the side of the semi-hard release material away from the carrier layer comprises: An atomized layer is formed on the bearing layer, wherein the atomized layer includes a plurality of atomized particles fixed in the atomized layer, and the distribution of the plurality of atomized particles forms a layer consisting of a plurality of depressions and protrusions. The atomized surface composed of; Covering the semi-hard release material on the atomized surface, wherein the semi-hard release material conforms to the atomized surface; and curing the semi-hard release material to make the release layer have the concave-convex surface. 23. The manufacturing method of the decorative film according to claim 20, wherein the method for forming the concave-convex surface on the side of the semi-hard release material away from the carrier layer comprises: Applying an embossing force to a pressed surface of the semi-hard release material, so that a pattern structure is formed on the pressed surface corresponding to the embossing force; and Curing the semi-hard release material to shape the pattern structure to form the release layer. 24. The manufacturing method of the decorative film according to claim 20, wherein the method for forming the concave-convex surface on the side of the semi-hard release material away from the carrier layer comprises: applying an embossing force to a pressure-receiving surface of the bearing layer, so that a pattern structure is formed on the pressure-receiving surface corresponding to the embossing force; Covering the semi-hard release material on the pressure receiving surface, wherein the semi-hard release material conforms to the pattern structure; and Curing the semi-hard release material to form the release layer conformal to the pattern structure. 25. The manufacturing method of the decorative film according to any one of claims 22 to 24, wherein in the step of curing the semi-hard release layer, the release layer is converted into a cured state by means of radiation or heating. 26. The manufacturing method of the decorative film according to claim 23 or 24, wherein the pressing surface receives the embossing force from a roller embossing process or a flat embossing process to form the pattern structure. 27. The manufacturing method of the decorative film according to claim 20, wherein the manufacturing method further comprises forming a pattern layer on one side of the release layer. 28. The manufacturing method of the decorative film according to claim 27, wherein the pattern layer is formed on the side of the release layer by screen printing, gravure printing or spray printing technology. 29. A method for manufacturing a decorative molding, comprising: Provide a decorative film as claimed in claim 1; forming a pattern layer on one side of the release layer; forming an adhesive layer on the side of the pattern layer away from the release layer; and Form a substrate tightly attached to the adhesive layer. 30. The method of manufacturing a decorative molded article as claimed in claim 29, wherein the method of forming the printed body comprises arranging a plastic material on the side of the adhesive layer away from the pattern layer, and the printed material is formed after the plastic material hardens. body. 31. The method of manufacturing a decorative molding as claimed in claim 30, wherein the plastic material is polycarbonate, polypropylene, acrylic, styrene methyl methacrylate copolymer, acrylonitrile-butadiene-benzene Vinyl, polystyrene, polyethylene terephthalate, or polyacetal. 32. The manufacturing method of the decorated molding as claimed in claim 29, wherein the manufacturing method further comprises applying a peeling force to the release layer to separate the release layer from the printing body. 33. The method for manufacturing a decorative molded article as claimed in claim 29, wherein the method for closely adhering the substrate to the adhesive layer comprises: placing the decorative film on the substrate; and The decorative film is closely connected with the printing body through the adhesive layer by means of pressing and heating. 34. The manufacturing method of the decorated molded article as claimed in claim 33, wherein the pressing and heating method comprises a thermal transfer printing method.

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