Process film and method for manufacturing a matte film using the process film.

Abstract

The present invention provides a process film that, when used to manufacture a matte film, suppresses unevenness caused by matte irregularities and moiré patterns in the process film, thereby improving the appearance of the matte film, and a method for manufacturing a matte film using the process film. [Solution] The matte coat layer 12 comprises a base material 11 and a matte coat layer 12 laminated on the base material 11. The matte coat layer 12 contains a resin and a matting agent, and the surface roughness Spk of the matte coat layer 12 on the side 12a opposite to the base material 11 is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178.

Description

[Technical Field]

[0001] The present invention relates to a process film for producing a matte film having a matte coat layer with an uneven surface, and a process film for producing a matte film in which the unevenness is transferred by forming a film on the matte coat layer, and a method for producing a matte film using the process film. [Background technology]

[0002] Conventionally, when manufacturing a matte film having a matte surface, a process film having a matte coating layer with an uneven surface is used, and a matte film material is applied to the uneven surface of this process film and cured to produce a matte film with an uneven surface (for example, Patent Document 1). [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Patent No. 7245687 [Overview of the project] [Problems that the invention aims to solve]

[0004] However, when manufacturing the matte coat layer of a process film, if a large amount of resin that will constitute the matte coat layer is applied at once, unevenness in the surface (hereinafter referred to as matte unevenness) may occur in the formed matte coat layer. On the other hand, if the resin that will constitute the matte coat layer is applied in small amounts in multiple layers, the diagonal shape of the printing plate used for application may interfere, causing moiré patterns (also called moire; hereinafter referred to as "moire") resembling stripes. Furthermore, when a matte film is manufactured using a process film that has developed matte unevenness or moiré, the unevenness of the process film is transferred to the matte film. As a result, the manufactured matte film has unique unevenness caused by the matte unevenness or moiré of the process film, which can impair the appearance of the matte film and reduce its quality.

[0005] The present invention aims to provide a process film that, when used to manufacture a matte film, can suppress unevenness in the matte finish and moiré patterns caused by the process film, thereby improving the appearance of the matte film, and a method for manufacturing a matte film using the process film. [Means for solving the problem]

[0006] A process film according to a first aspect of the present invention comprises a substrate and a matte coat layer laminated on the substrate, wherein the matte coat layer contains a resin and a matting agent, and the surface roughness Spk of the matte coat layer on the side opposite to the substrate is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178. In the above-described process film, a release layer is further laminated on the matte coat layer, and the thickness of the release layer is 0.5 g / m² in terms of solid content. 2 The configuration can be as follows: In the above-described process film, the matte coating layer can be configured to contain a release component and function as a release layer. A process film according to a second aspect of the present invention comprises a substrate, a matte coat layer laminated on the substrate, and a release layer laminated on the matte coat layer, wherein the matte coat layer contains a resin and a matting agent, and the surface roughness Spk of the release layer on the side opposite to the matte coat layer is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178. In the above-described process film, the matting agent can be configured to have a primary particle size of 1 to 10 μm. In the above-described process film, the matte coat layer may be configured to contain the matting agent in an amount of 5 to 50% by weight of the entire matte coat layer. The present invention relates to a method for manufacturing a matte film, which involves using a process film having a base material, a matte coat layer laminated on the base material, and a release layer laminated on the matte coat layer, and applying a resin raw material onto the release layer and curing it, wherein the matte coat layer or the release layer has a surface roughness Spk of 1.5 μm or more on the side opposite to the base material, measured under ISO 25178 at a magnification of 50x. [Effects of the Invention]

[0007] According to the present invention, when manufacturing a matte film, it is possible to suppress the occurrence of matte unevenness and moiré patterns in the matte film, thereby improving the appearance of the matte film. [Brief explanation of the drawing]

[0008] [Figure 1] This is a diagram showing the configuration of the process film according to this embodiment. [Figure 2] This figure illustrates the manufacturing method of the process film according to this embodiment. [Figure 3] This table shows the verification results regarding the relationship between surface roughness and appearance in the process film according to this embodiment. [Modes for carrying out the invention]

[0009] The process film according to the present invention will be described with reference to the drawings. The process film according to the present invention has irregularities on its surface, and by forming a film on the process film, a matte film with a matte feeling to which the irregularities are transferred can be manufactured. The matte film thus manufactured includes a resin sheet and an adhesive sheet.

[0010] FIG. 1 is a configuration diagram of the process film 1 according to the present embodiment. As shown in FIG. 1, the process film 1 according to the present embodiment has a structure in which a base material 11, a matte coat layer 12, and a release layer 13 are laminated in this order. Each layer will be described below.

[0011] (Base material) The base material 11 is made of a material such as PET (polyethylene terephthalate), polyimide, PEN (polyethylene naphthalate), polyester, polypropylene, or polyethylene. The thickness of the base material 11 is not particularly limited, and for example, it can be 10 to 300 μm, and more preferably 25 to 100 μm.

[0012] (Matte coat layer) The matte coat layer 12 is a layer laminated on the base material 11 and is a layer having irregularities on its surface. The matte coat layer 12 is mainly composed of a resin material, and for example, an acrylic resin, a melamine resin, a vinyl resin, a polyurethane resin, etc. can be used alone or in a polymer blend. In the present embodiment, an acrylic resin is used as the main component of the matte coat layer 12.

[0013] Further, the matte coat layer 12 has irregularities on the surface 12a (also referred to as the front surface 12a) on the side opposite to the base material 11. Since the matte coat layer 12 forms irregularities on the surface 12a, it contains a matting agent. The matting agent is solid particles and may be an inorganic substance such as silica or an organic substance such as acrylic beads. Also, it can be configured to include two or more types of particles as the matting agent, and it can also be configured to contain a mixture of inorganic particles and organic particles. In particular, by using matting agents with different particle sizes in combination compared to the case of using only matting agents with the same particle size, the spk value can be increased. Also, the matting agent can have a primary particle size in the range of 10 nm to 50 μm, more preferably in the range of 1 to 10 μm. In the present embodiment, it is configured to contain a mixture of silica with a primary particle size of 3 to 4 μm and acrylic beads with a primary particle size of 6 μm. The content of the matting agent is not particularly limited and can be 5 to 50% by weight, more preferably 10 to 35% by weight, of the entire matte coat layer 12.

[0014] Furthermore, the matte coat layer 12 can be configured to contain a curing agent (or crosslinking agent). As the curing agent (or crosslinking agent), for example, isocyanate can be used. Furthermore, the matte coat layer 12 can also be configured to contain a wax component, an antioxidant, or the like.

[0015] The matte coat layer 12 is formed by applying a coating material that constitutes the matte coat layer 12 onto the base material 11, drying it, and then curing it. The coating method of the coating material is not particularly limited, and for example, it can be applied by gravure printing or offset printing, or by using a comma coater or a bar coater. Also, the matte coat layer 12 can be formed by heating and drying the applied coating material at, for example, 40 to 120 degrees and then allowing it to stand and cure (age) at, for example, room temperature to 80°C for 8 to 168 hours.

[0016] Furthermore, the matte coat layer 12 can also be formed to have a predetermined thickness by applying the coating material multiple times. When applying the coating material multiple times, similar to multi-layer (multi-color) printing in general gravure printing, drying is performed after the first application, and then the application and drying of the coating material is repeated in the same manner to form a matte coat layer 12 with a thickness of two or more layers.

[0017] (Surface roughness of matte coat layer 12) In this embodiment, by manufacturing the matte coat layer 12 as described above, the Sa value (magnification 50x) indicating the surface roughness of the matte coat layer 12 can be set to the range of 0.1 to 2.0 μm, and the Spk value (magnification 50x) can be set to 1.5 μm or more. In particular, in the process film 1 according to this embodiment, by setting the Spk value on the surface of the matte coat layer 12 to 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178, a matte coat layer with good surface appearance can be obtained over a relatively wide area of ​​the matte coat layer 12. Here, the Spk value is an index indicating the height of the protrusions among the surface roughness of the matte coat layer 12, and generally, the lower the Spk value, the flatter the surface. Therefore, the inventors initially expected that the lower the Spk value, the more the occurrence of matte unevenness and moiré patterns could be suppressed. However, as will be described later, when we examined the relationship between surface roughness, including Sa value and Spk value, and appearance based on the occurrence of matte unevenness and moiré, we found that when Sa is large, the possibility of matte unevenness and moiré occurring in the manufacturing design process increases, and when the Spk value is high, such as 1.5 μm or more, the occurrence of matte unevenness and moiré is suppressed. The process film 1 according to the present invention was created based on these findings, and as described above, is characterized in that the Spk value of the surface 12a of the matte coat layer 12 is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178. The upper limit of the Spk value is not particularly limited, but it is preferably 5 μm or less, and more preferably 4 μm or less.

[0018] (Release layer 13) The release layer 13 is a layer laminated on the matte coat layer 12. In the present embodiment, the release layer 13 contains a resin as a main component. Examples of the resin used for the release layer 13 include thermosetting silicone resins and UV-curable silicones. Further, the release layer 13 can be configured to contain a catalyst that promotes the curing of the resin. Platinum or antimony can be used as such a catalyst. Since the release layer 13 is formed on the matte coat layer 12 having irregularities on the surface 12a, the surface 13a (hereinafter also referred to as the surface 13a) on the side of the release layer 13 opposite to the matte coat layer 12 also has irregularities.

[0019] In the present embodiment, the release layer 13 is formed by laminating a coating material for forming the release layer 13 on the matte coat layer 12. Specifically, the coating material for forming the release layer 13 can be applied, for example, by gravure coating, and then left to cure at room temperature to 80°C for 1 to 7 days to cure the coating material and form the release layer 13. The thickness of the release layer 13 is not particularly limited, but in terms of solid content, it is 0.01 g / m 2 or more, preferably 0.05 g / m 2 or more, more preferably 0.08 g / m 2 or more. Also, the thickness of the release layer 13 is 2.0 g / m 2 or less, more preferably 1.0 g / m 2 or less, even more preferably 0.5 g / m 2 or less, and particularly preferably 0.3 g / m 2 or less, and can be formed as such.

[0020] (Surface roughness of the release layer 13) In the process film 1 according to the present embodiment, by forming the release layer 13 as described above, even when the release layer 13 is formed, the appearance of the matte film 2 manufactured using the process film 1 can be improved. In particular, in the present embodiment, the release layer 13 is 0.5 g / m 2 or less, more preferably 0.3 g / m 2By forming the release layer 13 as described below, the Spk value (at a magnification of 50x) of the surface 13a of the release layer 13 can be set to 1.5 μm or more, or 1.6 μm or more. By setting the Spk value of the surface 13a of the release layer 13 to 1.5 μm or 1.6 μm or more under measurement conditions at a magnification of 50x in accordance with ISO 25178, unevenness in the surface caused by matte unevenness and moiré in the process film 1 can be suppressed, and a matte film 2 with excellent appearance can be obtained.

[0021] (Method for manufacturing matte film using process film) Next, a method for manufacturing a matte film 2 using the process film 1 according to this embodiment will be described. Figure 2 is a diagram illustrating the method for manufacturing a matte film 2 using the process film 1 according to this embodiment. First, as shown in Figure 2(A), the process film 1 is prepared. Generally, the process film 1 is in the form of a roll film wound into a roll when used, and is pulled out from the roll film for use. Next, as shown in Figure 2(B), the raw material for the matte film 2 is applied to the surface 13a of the release layer 13, and after heating and drying for a certain period of time, the raw material for the matte film 2 is hardened, thereby forming the matte film 2 on the release layer 13. The thickness of the matte film 2 is not particularly limited, but as an example, the raw material for the matte film 2 can be applied using a gravure printing plate or the like to a film thickness of 1 to 5000 μm, preferably 10 to 300 μm. Then, as shown in Figure 2(C), the matte film 2 can be produced by peeling the matte film 2 from the process film 1. The raw materials for matte film 2 are not particularly limited, but for example, epoxy resin, acrylic resin, urethane resin, vinyl acetate resin, silicone resin, rubber resin, etc. can be used as the main ingredient.

[0022] In this embodiment, by setting the Spk value of the surface 12a of the matte coat layer 12 to 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178, the surface 13a of the thin film release layer 13 also has corresponding irregularities. As a result, the matte film 2 formed on the surface 13a of the release layer 13 has an irregular structure in which the irregularities of the surface 13a of the release layer 13 are transferred. This allows the matte film 2 to have a matte appearance due to diffuse reflection of light on its surface. Furthermore, while unevenness and moiré patterns tend to occur in the matte film 2 when the Sa is large, even when the Sa of the matte film 2 is large, because it is formed on the thin film release layer 13 on the surface 12a having irregularities with an Spk value of 1.5 μm or more, the unevenness of the irregularities caused by matte unevenness and moiré patterns in the process film 1 is suppressed in the matte film 2, resulting in a superior appearance.

[0023] (Examples) Next, an example of the process film 1 according to this embodiment will be described. In this embodiment, process films of Test Examples 1 to 6 and Comparative Examples 1 to 3 were prepared in order to verify the relationship between the surface roughness and appearance of the process film. In Test Examples 1 to 6, the composition (components and their mixing ratios) of each layer of the process film was kept the same. The surface roughness of the process film was measured, and the appearance of the process film was evaluated. When the appearance of the process film is evaluated, if the occurrence of matte unevenness and moiré patterns is suppressed in the process film, it can be evaluated that the occurrence of matte unevenness and moiré patterns is suppressed in the mat film manufactured using that process film, because the unevenness is transferred as is. The following describes this embodiment with reference to Figure 3. Figure 3 is a diagram showing the verification results regarding the relationship between the surface roughness and appearance of the process film in this embodiment.

[0024] Test Examples 1-4 and 7-8 are examples of process films 1 created by manually applying the coating material constituting the matte coat layer 12 using a bar coater. Specifically, in Test Examples 1 and 3, a bar coater was used with a wet weight of 8 g / m². 2The coating material was applied to form a matte coat layer 12. In addition, in Test Examples 2 and 4, a bar coater was used with a wet amount of 13.8 g / m². 2 The coating material was applied to form a matte coat layer 12. In test examples 7 and 8, a bar coater was used with a wet amount of 11 g / m². 2 A coating material was applied to form a matte coat layer 12. Test examples 1, 2, 7, and 8 are examples of process film 1 in which the coating material constituting the matte coat layer 12 was applied only once to form the matte coat layer 12, while test examples 3 and 4 are examples of process film 1 in which the coating material constituting the matte coat layer 12 was applied in two separate applications to form the matte coat layer 12. Test example 5 is an example of process film 1 in which a gravure plate with a cell capacity of 17 cc was used to form a matte coat layer 12 by applying the coating material constituting the matte coat layer 12 in two separate applications. Furthermore, test example 6 is an example of process film 1 in which a gravure plate with a cell capacity of 5.5 cc was used to form a matte coat layer 12 by applying the coating material constituting the matte coat layer 12 in two separate applications.

[0025] Furthermore, in this embodiment, process films of Comparative Examples 1 to 8 were prepared as comparative examples. Specifically, Comparative Examples 1 to 4 are examples of process film 1 in which a matte coat layer 12 was formed by applying the coating material constituting the matte coat layer 12 in two separate applications using a gravure plate with a cell capacity of 8 cc. In addition, in Comparative Examples 1 to 4, the content of the matte agent in the matte coat layer 12 was varied. Specifically, 0 to 15 parts by weight of matte agent and 8 parts by weight of curing agent were added to the main component of the resin containing the matte agent (Sakata Inx Corporation's XGS5011 Matte Medium NT, containing 16.7% matte agent components). More specifically, in Comparative Example 1, 15 parts by weight of matte agent were added to 100 parts by weight of the main component of the resin; in Comparative Example 2, 10 parts by weight of matte agent were added to 100 parts by weight of the main component of the resin; in Comparative Example 3, 5 parts by weight of matte agent were added to 100 parts by weight of the main component of the resin; and in Comparative Example 4, 0 parts by weight of matte agent were added to 100 parts by weight of the main component of the resin. Furthermore, in Comparative Examples 5, 7, and 8, a bar coater was used to achieve a wet rate of 7.5 g / m². 2The coating material was applied once to form a matte coat layer 12. In Test Example 6, a bar coater was used with a wet amount of 11 g / m². 2 A single coat of coating material was applied to form a matte coat layer 12. Furthermore, in this example, two types of matting agents were used: a matting agent of normal diameter and a matting agent of large diameter. In Examples 1-6 and Comparative Examples 1-4, only the matting agent of normal diameter was used; in Comparative Examples 5 and 6, only the matting agent of large diameter was used; in Comparative Example 7 and Example 7, a portion of the matting agent of normal diameter was replaced with the matting agent of large diameter; and in Comparative Example 8 and Example 8, the proportion of the matting agent of large diameter was increased compared to Comparative Example 7 and Example 7. The spk value can be adjusted by using matting agents of different particle sizes.

[0026] In this example, process films for Test Examples 1-8 and Comparative Examples 1-8 were first prepared, and the surface roughness of the prepared process films was measured. Specifically, using a contact-type measuring device (Mitutoyo Co., Ltd., product name "SJ-400"), the Ra and Rz in the MD direction (machine direction) and the Ra and Rz in the TD direction (transverse direction) were measured for the process films of Test Examples 1-6 and Comparative Examples 1-4 in accordance with JIS B 0601, as shown in Figure 3. Furthermore, using a non-contact measuring device (Keyence Co., Ltd., product name "VK-X1000"), the Sa, Svk, and Spk were also measured for the process films of Test Examples 1-8 and Comparative Examples 1-8 in accordance with ISO 25178. Note that the Sa, Svk, and Spk measurements were performed under 50x magnification.

[0027] Furthermore, in this embodiment, five panelists, who are experts in process films according to this embodiment, visually evaluated the process films of Test Examples 1-8 and Comparative Examples 1-8 for the occurrence of matte unevenness and moiré patterns. Specifically, the appearance of the process films was evaluated on a four-point scale: "1" for no matte unevenness or moiré patterns, "2" for almost no matte unevenness or moiré patterns, "3" for some matte unevenness or moiré patterns, and "4" for a lot of matte unevenness or moiré patterns. The average value of the evaluation results from the five panelists was then calculated.

[0028] In addition, in this embodiment, in the process films of Test Examples 1, 4, and 6 and Comparative Examples 2 to 4, a release layer 13 is applied on the surface 12a of the matte coat layer 12 with a solid component of 0.1 g / m². 2 With a thickness of 0.4 g / m², or with a solid content of 0.4 g / m². 2 The mold release layer 13 was formed to a certain thickness, and the surface roughness spk of the surface 13a of the mold release layer 13 was measured and its appearance was evaluated at each thickness. The method for measuring surface roughness spk and the method for evaluating the appearance were the same as in the case where the mold release layer 13 was not present.

[0029] As shown in Figure 3, in the absence of the release layer 13, the process film 1 according to Test Examples 1 to 8 received a good evaluation of "1" or "2" for appearance, and the occurrence of matte unevenness and moiré patterns was suppressed. Therefore, it is considered that the occurrence of matte unevenness and moiré patterns can also be suppressed in matte film 2, which has been given unevenness by transfer using process film 1 from Test Examples 1 to 8. On the other hand, the process films according to Comparative Examples 1 to 8 received an evaluation of "3" or "4" for appearance, and matte unevenness and moiré patterns occurred. Therefore, it is considered that the matte films given unevenness by transfer using process films from Comparative Examples 1 to 8 will also experience unique unevenness caused by matte unevenness and moiré patterns.

[0030] Furthermore, as shown in Figure 3, when the release layer 13 is absent, a comparison of process film 1 according to Test Examples 1-8 with process film according to Comparative Examples 1-8 revealed that process film 1 according to Test Examples 1-8 tends to have a higher Spk value in the surface roughness of the matte coat layer 12. Specifically, in process film 1 according to Test Examples 1-8, the surface roughness Spk value of the surface 12a of the matte coat layer 12 opposite to the substrate 11 was 1.5 μm or higher under measurement conditions of 50x magnification in accordance with ISO 25178, while in process film according to Comparative Examples 1-8, the Spk value was less than 1.5 μm.

[0031] As shown in Figure 3, the results indicate that when the release layer 13 is absent, the occurrence of matte unevenness and moiré patterns tends to be suppressed when the Spk value, an index indicating the surface roughness of the matte coat layer 12, is large. Specifically, it was found that the occurrence of matte unevenness and moiré patterns is suppressed when the Spk value of the surface 12a of the matte coat layer 12 is 1.5 μm or higher, measured under the 50x magnification conditions compliant with ISO 25178. Furthermore, in Examples 2 to 4, where the Spk value is in the range of 1.75 to 2.0 μm, the occurrence of matte unevenness and moiré patterns was further suppressed, resulting in superior appearance.

[0032] Furthermore, a release layer 13 is applied to the surface 12a of the matte coat layer 12 with a solid component of 0.1 g / m². 2 Even when formed with this thickness, the results from process film 1 related to test examples 1, 4, and 6 and process films related to comparative examples 2 to 4, as shown in Figure 3, showed that, similar to the case where the release layer 13 is not formed, when the index indicating the Spk value is large, more specifically, when the Spk value of the surface 13a of the release layer 13 is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178, the occurrence of matte unevenness and moiré patterns can be suppressed. Furthermore, when the release layer 13 is formed on the surface 12a of the matte coat layer 12 with a solid component of 0.4 g / m² 2 Even when formed with this thickness, it was found that, similar to the case where the release layer 13 is not formed, when the index indicating the Spk value is large, more specifically, when the Spk value of the surface 13a of the release layer 13 is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO25178, the occurrence of matte unevenness and moiré tends to be suppressed.

[0033] As described above, the process film 1 according to this embodiment has a base material 11 and a matte coat layer 12 laminated on the base material 11. The matte coat layer 12 contains a resin and a matting agent, and the surface roughness Spk of the matte coat layer 12a on the side opposite to the base material 11 is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178. Furthermore, the process film 1 according to this embodiment has a release layer 13 laminated on the matte coat layer 12, and the surface roughness Spk of the release layer 13 on the side opposite to the matte coat layer 12 is 1.5 μm or more under measurement conditions of 50x magnification in accordance with ISO 25178. Such a process film 1 can suppress the occurrence of matte unevenness and moiré in the process film 1, as shown in the example in Figure 3, and as a result, the occurrence of specific unevenness caused by matte unevenness and moiré in the process film 1 can be suppressed in the matte film 2 manufactured using the process film 1. In particular, in the process film 1 according to the first embodiment, the matting agent in the matting coat layer 12 has a primary particle size of 1 to 10 μm, and a first matting agent which is organic and a second matting agent which is inorganic are mixed, making the primary particle size of the first matting agent larger than that of the second matting agent, and furthermore, by including 5 to 50% by weight of the entire matting coat layer, the occurrence of matting unevenness and moiré patterns in the matting film 2 manufactured using the process film 1 can be more effectively suppressed.

[0034] Although preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the embodiments described above. Various modifications and improvements can be made to the above embodiments, and such modified or improved forms are also included within the technical scope of the present invention.

[0035] For example, in the embodiment described above, the process film 1 was described as a laminate having three layers: a base material 11, a matte coat layer 12, and a release layer 13. However, the embodiment is not limited to this configuration, and it can also be configured as a laminate consisting of two layers: a base material 11 and a matte coat layer 12. In this case, it is preferable that the matte coat layer 12 contains a release component and functions as a release layer. The release component is selected according to its incompatibility with the matte film 2. For example, if the matte film 2 is an epoxy resin or a urethane resin, the release component can be modified melamine resin beads, and if the matte film 2 is a resin other than a silicone-based resin, the matte agent can be silicone beads.

[0036] Furthermore, in the embodiments described above, a configuration in which a matte coat layer 12 is laminated on a substrate 11 was illustrated. However, in order to improve the adhesion between the substrate 11 and the matte coat layer 12, the portion of the matte coat layer 12 that comes into contact with the substrate 11 can be made using only the main component of the matte coat layer 12 (a resin that does not contain a matting agent). In other words, in this case, the matte coat layer 12 is made by applying the coating material multiple times. In the first application, only the main component (a resin that does not contain a matting agent) is applied, and then from the second application onward, a resin containing a matting agent is applied. By making the first coating material that comes into contact with the substrate 11 a main component that does not contain a matting agent (or a coating material with a small amount of matting agent), the adhesion between the substrate 11 and the coating material can be improved compared to the case in which a coating material that normally contains a matting agent is applied in the first application. As a result, the adhesion between the substrate 11 and the matte coat layer 12 can be improved. [Explanation of Symbols]

[0037] 1…Process film 11...Base material 12… Matte coat layer 12a…Surface (face) 13...Release layer 13a…Surface (surface) 2… Matte film

Claims

1. It comprises a base material and a matte coating layer laminated on the base material, The aforementioned matte coating layer contains a resin and a matting agent, A process film wherein the surface roughness Spk of the matte coating layer on the side opposite to the substrate is 1.5 μm or more, measured under 50x magnification conditions in accordance with ISO 25178.

2. The matte coat layer further comprises a release layer laminated on top of the matte coat layer, The thickness of the release layer is 0.5 g / m² in terms of solid content. ２ The process film according to claim 1, which is as follows:

3. The process film according to claim 1, wherein the matte coating layer contains a release component and also functions as a release layer.

4. It comprises a base material, a matte coat layer laminated on the base material, and a release layer laminated on the matte coat layer, The aforementioned matte coating layer contains a resin and a matting agent, A process film wherein the surface roughness Spk of the release layer on the side opposite to the matte coat layer is 1.5 μm or more, measured under the magnification of 50x in accordance with ISO 25178.

5. The process film according to claim 1 or 4, wherein the matting agent has a primary particle size of 1 to 10 μm.

6. The process film according to claim 1 or 4, wherein the matte coat layer contains the matting agent in an amount of 5 to 50% by weight of the entire matte coat layer.

7. A method for manufacturing a matte film, comprising using a process film having a base material, a matte coat layer laminated on the base material, and a release layer laminated on the matte coat layer, and applying a resin raw material onto the release layer and curing it, A method for manufacturing a matte film, wherein the matte coating layer or the release layer has a surface roughness Spk on the side opposite to the substrate that is 1.5 μm or more, measured under the conditions of 50x magnification in accordance with ISO 25178.

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