Method for manufacturing functional seals for vehicles and functional seals for vehicles

Abstract

To provide a method for manufacturing vehicle functional seals that can be produced in a simple manner, and to provide vehicle functional seals that are highly functional. [Solution] The method for manufacturing a functional seal for vehicles is a method for manufacturing a functional seal for vehicles having a substrate and an ink layer of UV-curable ink on the substrate by screen printing using UV-curable ink, comprising: a first step of obtaining a laminate by forming an emulsion layer containing an emulsion and having a thickness of 45 μm to 55 μm in a predetermined pattern on a mesh screen having a mesh count of 70 to 250, a wire diameter of 40 μm to 71 μm, and an opening of 65 μm to 292 μm; a second step of filling the gaps in the pattern of the emulsion layer with uncured UV-curable ink having a viscosity of 2000 mPa to 100000 mPa at room temperature; and a third step of bringing the substrate and the laminate into close contact and transferring the UV-curable ink onto the substrate.

Description

[Technical Field]

[0001] This invention relates to a method for manufacturing a functional seal for vehicles and to a functional seal for vehicles. [Background technology]

[0002] Traditionally, automotive parts and other products have been decorated with printing or painting to enhance their functionality. Specifically, for example, common methods such as thick-layer printing were sometimes used to apply a textured pattern to automotive parts that had the function of reducing air resistance.

[0003] For example, Patent Document 1 discloses a technique for efficiently printing raised objects such as letters onto the surface of a molded body. Specifically, by printing an ultraviolet-curable resin using screen printing and curing it by irradiating it with ultraviolet light, molded products having various patterns can be manufactured.

[0004] It is conceivable that a functional sticker for vehicles with a desired pattern printed on it can be manufactured using the method described in Patent Document 1.

[0005] However, conventionally, sufficient research had not been conducted on the conditions for screen printing when manufacturing functional seals for vehicles. As a result, even if functional seals for vehicles were manufactured simply by screen printing, it was not possible to obtain highly functional seals for vehicles. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2004-86438 [Overview of the Initiative] [Problems that the invention aims to solve]

[0007] The object of the present invention is to provide a method for manufacturing a vehicle functional seal and a vehicle functional seal that can be manufactured in a simple manner, enabling the production of highly functional vehicle functional seals. [Means for solving the problem]

[0008] A method for manufacturing a functional seal for vehicles according to an application example of the present invention is a method for manufacturing a functional seal for vehicles having a substrate and an ink layer of the UV-curable ink on the substrate by screen printing using UV-curable ink, A first step is to obtain a laminate by forming an emulsion layer containing an emulsion and having a thickness of 45 μm to 55 μm in a predetermined pattern on a mesh screen with a mesh count of 70 to 250, a wire diameter of 40 μm to 71 μm, and an opening of 65 μm to 292 μm, A second step involves filling the gaps in the pattern of the emulsion layer with the UV-curable ink before curing, which has a viscosity of 2000 mPa or more and 100000 mPa or less at room temperature. The third step involves bringing the substrate and the laminate into close contact and transferring the uncured UV-curable ink, which is filled into the gaps in the pattern of the emulsion layer, onto the substrate.

[0009] A functional seal for vehicles according to an application example of the present invention is a functional seal for vehicles that is attached to a predetermined part of a vehicle, Substrate and An adhesive layer provided on one side of the substrate, The substrate is provided on the other side and comprises an ink layer made of UV-curable ink, The ink layer has a predetermined pattern, The thickness of the ink layer is between 20 μm and 60 μm. [Effects of the Invention]

[0010] According to the present invention, highly functional vehicle seals can be manufactured in a simple manner. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a diagram schematically showing a method for manufacturing a functional seal for a vehicle according to an embodiment of the present invention. [Figure 2] Figure 2 is an enlarged plan view of the mesh screen shown in Figure 1. [Figure 3] Figure 3 is a plan view of the functional seal for a vehicle according to the embodiment of the present invention. [Figure 4] Figure 4 is a perspective view showing an example of a vehicle to which the functional seal for a vehicle according to the embodiment of the present invention is affixed. [Figure 5] Figure 5 is a plan view showing another example of the functional seal for a vehicle according to the embodiment of the present invention. DETAILED DESCRIPTION OF EMBODIMENTS

[0012] Hereinafter, embodiments of the present invention relating to a method for manufacturing a functional seal for a vehicle and the functional seal for a vehicle will be described in detail with reference to the accompanying drawings.

[0013] <First Embodiment> Figure 1 is a diagram schematically showing the method for manufacturing a functional seal for a vehicle according to the embodiment of the present invention. Figure 2 is an enlarged plan view of the mesh screen shown in Figure 1. Figure 3 is a plan view of the functional seal for a vehicle according to the embodiment of the present invention.

[0014] The present invention relates to a method for manufacturing a functional seal for vehicles, which involves screen printing using UV-curing ink 5 to manufacture a functional seal for vehicles 100 having a substrate 101 and an ink layer 102 of UV-curing ink on the substrate 101. The method comprises: a first step of obtaining a laminate 10 by forming an emulsion layer 3 containing an emulsion and having a predetermined pattern with a thickness of 45 μm to 55 μm on a mesh screen 2 having a mesh count of 70 to 250, a wire diameter D of 40 μm to 71 μm, and an opening O of 65 μm to 292 μm; a second step of filling the gaps in the pattern of the emulsion layer 3 with uncured UV-curing ink 5 having a viscosity of 2000 mPa to 100000 mPa at room temperature; and a third step of bringing the substrate 101 and the laminate 10 into close contact and transferring the uncured UV-curing ink 5 that has filled the gaps in the pattern of the emulsion layer 3 onto the substrate 101.

[0015] Screen printing is a printing method that allows for inexpensive and easy printing with a relatively simple equipment configuration. However, it is difficult to form a relatively thick ink layer and to sharpen the edges of the ink layer. In the present invention, by performing screen printing using the mesh screen 2, emulsion layer 3, and UV-curable ink 5 described above, a relatively thick ink layer 102 can be formed, and the edges of the ink layer 102 can be sharpened. Therefore, the functionality of the vehicle functional seal 100 can be improved. Thus, according to the present invention, a highly functional vehicle functional seal 100 can be manufactured in a simple and inexpensive manner.

[0016] In this specification, "functionality" refers to the characteristic of reducing the force generated by airflow, that is, streamlining the airflow when a vehicle to which the vehicle functional seal 100 is attached is in motion, thereby improving handling stability and ultimately improving fuel efficiency.

[0017] [1] Method for manufacturing a printing unit and a functional seal for vehicles As shown in Figure 1, the printing unit 1 is a device for manufacturing a vehicle functional seal 100, described later, by screen printing using UV-curable ink 5, and implements the vehicle functional seal manufacturing method of the present invention. The printing unit 1 comprises a mesh screen 2, an emulsion layer forming unit 4 for forming an emulsion layer 3, an ink filling unit 6 for filling with UV-curable ink 5, a transfer unit 7, and a curing unit 8.

[0018] [1-1] Mesh screen 2 As shown in Figures 1 and 2, the mesh screen 2 is a plain weave net in which wires 21 are woven, and has numerous openings 22. Through these openings 22, the UV-curing ink 5 moves from the upper side in Figure 1 to the lower side in Figure 1 and is transferred onto the substrate 101.

[0019] The cross-sectional shape of the wire 21 is not particularly limited and may include circular, elliptical, rectangular, or combinations thereof.

[0020] Furthermore, the mesh screen 2 is not limited to plain weave mesh, but may also be twill weave mesh, crimped mesh, welded mesh (wire mesh), hexagonal mesh, etc.

[0021] The constituent material of the mesh screen 2 is not particularly limited, but resin materials such as polyester are preferably used. The wire diameter D (average width or average diameter) of wire 21 is between 40 μm and 71 μm.

[0022] This contributes to making the thickness of the ink layer 102, described later, relatively thick, and allows the edges of the ink layer 102 to be sharpened. Thus, the functionality of the vehicle functional seal 100 can be improved.

[0023] If the wire diameter D of the wire material 21 is below the lower limit, the thickness of the ink layer 102 tends to decrease, leading to a decrease in the functionality of the vehicle functional seal 100.

[0024] If the wire diameter D of the wire 21 exceeds the upper limit, it becomes difficult to fill the opening 31 of the emulsion layer 3, which will be described later, with UV-curable ink 5.

[0025] The wire diameter D of the wire material 21 may be between 40 μm and 71 μm, but it is more preferable that it be between 43 μm and 65 μm. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0026] Furthermore, mesh screen 2 has a mesh count of 70 or more and 250 or less.

[0027] By using such a mesh screen 2, it is possible to make the thickness of the ink layer 102, which will be described later, relatively thick, and the edges of the ink layer 102 can be made sharper. Therefore, the functionality of the vehicle functional seal 100 can be improved.

[0028] In this specification, mesh count refers to the number of wires 21 per inch.

[0029] If the mesh count is below the lower limit, it becomes difficult to fill the opening 31 of the emulsion layer 3 (described later) with UV-curable ink 5.

[0030] When the mesh count exceeds the upper limit, the thickness of the ink layer 102 tends to decrease, leading to a decline in the functionality of the vehicle functional seal 100.

[0031] The mesh screen 2 can have a mesh count of 70 to 250, but it is more preferable that it has a mesh count of 80 to 240. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0032] Furthermore, the mesh screen 2 has an opening O of 65 μm or more and 292 μm or less.

[0033] Using such a mesh screen 2 helps to sharpen the edges (ends) of the ink layer 102. Therefore, the functionality of the vehicle functional seal 100 can be improved.

[0034] In this specification, the opening O refers to the distance between two parallel, adjacent wires 21.

[0035] If the opening O is below the lower limit, it becomes difficult to fill the opening 31 of the emulsion layer 3 (described later) with UV-curable ink 5.

[0036] When the opening O exceeds the upper limit, the thickness of the ink layer 102 tends to decrease, leading to a decline in the functionality of the vehicle functional seal 100.

[0037] The opening O can be between 65 μm and 292 μm, but it is more preferable that it be between 70 μm and 280 μm. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0038] [1-2] Emulsion layer forming section 4 As shown in Figure 1(A), the emulsion layer forming section 4 is the part that performs the first step of forming an emulsion layer 3 containing an emulsion on the upper surface of the mesh screen 2 in Figure 1(A) to obtain a laminate 10.

[0039] The emulsion preferably contains a photosensitive resin, and examples include diazo emulsions containing vinyl acetate polymer, acrylic emulsions, or mixtures thereof.

[0040] The emulsion layer forming section 4 may be configured such that a liquid photosensitive resin is applied onto a mesh screen 2 using various coaters, and an emulsion layer 3 is formed by exposure using a mask with a predetermined pattern.

[0041] The formed emulsion layer 3 has portions where emulsion is present and portions where emulsion is absent. That is, the emulsion layer 3 has a shape with openings 31 in a predetermined pattern. UV-curable ink 5, which will be described later, is filled into these openings 31 and transferred to the substrate 101. Therefore, the pattern of the openings 31 becomes the pattern of the ink layer 102.

[0042] The pattern of the opening 31, that is, the pattern of the ink layer 102, will be described in detail later.

[0043] The thickness T1 (average thickness) of emulsion layer 3 is between 45 μm and 55 μm. By setting the thickness T1 of the emulsion layer 3 within the above numerical range, it is possible to make the thickness of the ink layer 102 relatively thick, and the edges of the ink layer 102 can be made sharper. Therefore, the functionality of the vehicle functional seal 100 can be improved.

[0044] If the thickness T1 of the emulsion layer 3 is below the lower limit, the thickness of the ink layer 102 becomes too thin, leading to a decrease in the functionality of the vehicle functional seal 100.

[0045] If the thickness T1 of the emulsion layer 3 exceeds the upper limit, it becomes difficult to make the edges of the ink layer 102 stand up, leading to a decrease in the functionality of the vehicle functional seal 100.

[0046] The thickness T1 of the emulsion layer 3 may be between 45 μm and 55 μm, but it is more preferable that it be between 48 μm and 52 μm. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0047] [1-3] Ink filling section 6 As shown in Figure 1(B), the ink filling section 6 is the part that performs the second step of filling the openings 31 of the emulsion layer 3 (the gaps in the pattern of the emulsion layer 3) with UV-curable ink 5 before curing. The ink filling section 6 may be configured to apply the UV-curable ink 5 with various coaters, or it may be configured to supply the UV-curable ink 5 by a dispenser or inkjet.

[0048] UV-curing ink 5 has a viscosity at room temperature of 2000 mPa or more and 100000 mPa or less.

[0049] By setting the viscosity of the UV-curing ink 5 at room temperature within the above numerical range, it is possible to make the thickness of the ink layer 102 relatively thick, and the edges of the ink layer 102 can be made sharper. Therefore, the functionality of the vehicle functional seal 100 can be improved.

[0050] If the viscosity of the UV-curing ink 5 at room temperature is below the lower limit, it becomes difficult to increase the thickness of the ink layer 102, which leads to a decrease in the functionality of the vehicle functional seal 100.

[0051] If the viscosity of the UV-curable ink 5 at room temperature exceeds the upper limit, it becomes difficult to fill the opening 31 of the emulsion layer 3 with the UV-curable ink 5.

[0052] The viscosity of the UV-curing ink 5 at room temperature should be between 2,000 mPa and 100,000 mPa, but it is more preferable that it be between 3,000 mPa and 50,000 mPa. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0053] [1-4] Transfer section 7 As shown in Figure 1(C), the transfer unit 7 is the part that performs the third step of bringing the substrate 101 and the laminate 10 into close contact and transferring the uncured UV-curable ink 5, which is filled in the gaps in the pattern of the emulsion layer 3 (inside the openings 31 of the emulsion layer 3), onto the substrate 101. The transfer unit 7 transfers the UV-curable ink 5 onto the substrate 101 via the mesh screen 2 by pressing, for example, a squeegee or the like.

[0054] [1-5] Hardened part 8 As shown in Figure 1(D), the curing section 8 is the part that performs the fourth step, which is carried out after the third step, by irradiating the UV-curable ink 5, which has been transferred onto the substrate 101 before curing, with ultraviolet light to cure the UV-curable ink 5.

[0055] The curing section 8 has a light source such as an LED lamp, a high-pressure mercury lamp, an electrodeless lamp, a metal halide lamp, or a xenon lamp.

[0056] The intensity of the emitted UV rays is 280 mJ / cm². 2 More than 320mJ / cm 2 Preferably, it is 300 mJ / cm² 2 More than 310mJ / cm 2 The following is more preferable.

[0057] This allows the UV-curable ink 5 transferred onto the substrate 101 to be cured more effectively and quickly.

[0058] Furthermore, the peak irradiance of ultraviolet light emitted in the fourth step is 10 mW / cm². 2 More than 1000mW / cm 2 Preferably, it is 20 mW / cm². 2 More than 500mW / cm 2 The following is more preferable.

[0059] This allows the UV-curable ink 5 transferred onto the substrate 101 to be cured more effectively and quickly.

[0060] Further, the cumulative light amount of ultraviolet rays irradiated in the fourth step is 50 mJ / cm 2 or more and 1000 mJ / cm 2 or less, preferably 100 mJ / cm 2 or more and 700 mJ / cm 2 or less, which is more preferable.

[0061] Accordingly, the uncured UV-curable ink 5 transferred onto the base material 101 can be more effectively cured.

[0062] As described above, the method for manufacturing a functional seal for a vehicle according to the present embodiment includes the first to fourth steps described above. That is, the method for manufacturing a functional seal for a vehicle is a method for manufacturing a functional seal for a vehicle 100 having a base material 101 and an ink layer 102 of UV-curable ink on the base material 101 by screen printing using UV-curable ink 5, the method comprising: a first step of forming a predetermined patterned emulsion layer 3 containing an emulsion and having a thickness of 45 μm or more and 55 μm or less on a mesh screen 2 having a mesh count of 70 or more and 250 or less, a wire diameter D of 40 μm or more and 71 μm or less, and an opening O of 65 μm or more and 292 μm or less, to obtain a laminate 10; a second step of filling the gaps in the pattern of the emulsion layer 3 with uncured UV-curable ink 5 having a viscosity of 2000 mPa or more and 100000 mPa or less at normal temperature; and a third step of bringing the base material 101 into close contact with the laminate 10 to transfer the uncured UV-curable ink 5 filled in the gaps in the pattern of the emulsion layer 3 onto the base material 101.

[0063] Further, it is more preferable that the mesh screen 2 has an opening O of 70 μm or more and 280 μm or less, a wire diameter D of 43 μm or more and 65 μm or less, the thickness of the emulsion layer 3 is 48 μm or more and 52 μm or less, and the viscosity of the uncured UV-curable ink 5 at normal temperature is 3000 mPa or more and 50000 mPa or less.

[0064] This allows for the more effective formation of a relatively thick ink layer 102 and more effectively sharpening of the edges of the ink layer 102. Therefore, the functionality of the vehicle functional seal 100 can be further enhanced.

[0065] Furthermore, the vehicle functional seal manufacturing method according to this embodiment includes a fourth step, which is performed after the third step, in which ultraviolet light is irradiated onto the uncured UV-curable ink 5 transferred onto the substrate 101 to cure the UV-curable ink, and the intensity of the UV rays irradiated in the fourth step is 280 mJ / cm². 2 More than 320mJ / cm 2 The following is preferable:

[0066] This allows the UV-curable ink 5 transferred onto the substrate 101 to be cured more effectively and quickly.

[0067] [3] Functional seals for vehicles As shown in Figures 1(D) and 3, the vehicle functional seal 100 is used by being attached to a predetermined part of a vehicle, and comprises a base material 101, an ink layer 102, and an adhesive layer 103.

[0068] Vehicles include various types of automobiles (including motorcycles and automobiles), bicycles, and vehicles with wheels such as trains (including bullet trains and maglev trains).

[0069] The designated parts of a vehicle refer to the parts that are exposed to the outside air while driving. Specifically, as shown in Figure 4, designated parts of a vehicle include the front bumper A1, front fender A2, roof A3, and C-pillar A4, etc. However, the designated parts of a vehicle are not limited to these. Furthermore, the vehicle itself is not limited to the vehicle type shown in the illustration.

[0070] [3-1] Base material The base material 101 is not particularly limited, and for example, a resin film or the like can be used.

[0071] Examples of resin films include polyvinyl chloride, polyurethane, polyethylene terephthalate (PET), and polybutylene terephthalate (PBT).

[0072] The substrate 101 may or may not be light-transmitting, but it is preferable that it be light-transmitting.

[0073] This allows the vehicle's exterior color to be emphasized when the vehicle's functional sticker 100 is applied to the vehicle, resulting in superior design aesthetics.

[0074] [3-2] Ink layer As shown in Figure 3, the ink layer 102 is provided on the upper side (the other side) of the substrate 101 and, as described above, has a predetermined pattern. Specifically, the ink layer 102 consists of multiple linear portions 104 arranged in a direction along one axis. The portions 104 form rows spaced apart along their longitudinal direction, and multiple such rows are spaced apart from each other. In addition, the portions 104 are offset from each other in adjacent rows.

[0075] According to this pattern, the functionality of the vehicle functional seal 100 can be more effectively enhanced.

[0076] The width W (average width) of section 104 is preferably 300 μm or more and 700 μm or less, and more preferably 350 μm or more and 650 μm or less. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0077] The thickness T2 of the ink layer 102 is between 20 μm and 60 μm. This enhances the functionality of the vehicle functional seal 100.

[0078] If the thickness T2 of the ink layer 102 is below the lower limit, the functionality of the vehicle functional seal 100 will be reduced. If the thickness T2 of the ink layer 102 exceeds the upper limit, manufacturing becomes difficult.

[0079] The thickness T2 of the ink layer 102 may be between 20 μm and 60 μm, but it is more preferable that it be between 22 μm and 55 μm. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0080] [3-3] Adhesive layer Furthermore, it is preferable that an adhesive layer (not shown) is provided on the side of the substrate 101 opposite to the ink layer (one side). This allows the vehicle function sticker 100 to be attached to the vehicle.

[0081] Examples of adhesive materials that make up the adhesive layer 103 include acrylic adhesives, rubber adhesives, silicone adhesives, and the like.

[0082] Examples of acrylic adhesives include resins composed of (meth)acrylic acid and its esters, and copolymers of (meth)acrylic acid and its esters with copolymerizable unsaturated monomers (e.g., vinyl acetate, styrene, acrylonitrile, etc.). Furthermore, two or more of these resins may be mixed.

[0083] Examples of rubber-based adhesives include natural rubber-based, isoprene rubber-based, styrene-butadiene-based, recycled rubber-based, and polyisobutylene-based adhesives, as well as adhesives mainly composed of block copolymers containing rubber such as styrene-isoprene-styrene and styrene-butadiene-styrene.

[0084] Examples of silicone-based adhesives include dimethylsiloxane-based and diphenylsiloxane-based adhesives.

[0085] Furthermore, the adhesive layer 103 may contain various additives as needed, such as plasticizers, tackifiers, thickeners, fillers, antioxidants, preservatives, fungicides, dyes, and pigments.

[0086] Furthermore, a release liner (not shown) may be provided on the side of the adhesive layer 103 opposite to the substrate 101.

[0087] This prevents or suppresses the loss of adhesive strength of the adhesive layer 103 until the vehicle functional seal 100 is attached to a predetermined part of the vehicle.

[0088] As for the release liner, for example, one can be used that has a structure in which a release layer containing a release agent, such as a silicone-based one, is formed on the surface of a film substrate made of a resin film or a paper substrate.

[0089] As described above, the vehicle functional seal 100 is used by being attached to a predetermined part of a vehicle, and comprises a base material 101, an adhesive layer 103 provided on one side of the base material 101, and an ink layer 102 made of UV-curable ink 5 provided on the other side of the base material 101, the ink layer 102 having a predetermined pattern, and the thickness of the ink layer 102 is 20 μm or more and 60 μm or less. This enhances the functionality of the vehicle functional seal 100.

[0090] Furthermore, the predetermined pattern has linear portions 104, and the width W of the portions 104 is between 300 μm and 700 μm. This makes it possible to more effectively enhance the functionality of the vehicle functional seal 100.

[0091] Although the manufacturing method for vehicle functional seals and vehicle functional seals of the present invention have been described above, the present invention is not limited to the embodiments described above. Furthermore, for example, each part and process of the manufacturing method for vehicle functional seals and vehicle functional seals of the present invention may be replaced with any component or process having a similar function, or any component or process may be added to the embodiments described above.

[0092] The pattern of the ink layer 102 is not limited to the configuration shown in Figure 3, but may also be a honeycomb pattern, a dimple pattern, or the like, as shown in Figure 5. [Examples]

[0093] Next, specific embodiments of the present invention will be described. [4] Preparation of raw materials As an emulsion, we prepared "SCR-640" manufactured by Kurita Chemical Laboratories Co., Ltd.

[0094] For the UV-curing ink, we prepared "RL-N Torii Atsumori Clear" manufactured by Jujo Chemical Co., Ltd. We prepared Lintec's "FS-3300" as the base material.

[0095] [5] Manufacturing of vehicle functional seals using raw materials (Example 1) A mesh screen with a mesh count of 70, a wire diameter of 40 μm to 71 μm, and an opening of 65 μm to 292 μm was prepared. An emulsion was applied to one side of the mesh screen to form an emulsion layer 3 having the openings 31 of the pattern described in the above embodiment. The thickness of emulsion layer 3 was between 45 μm and 55 μm. The mesh count values ​​in the table are listed according to the manufacturer's catalog values.

[0096] Next, UV-curing ink is filled into the entire opening 31, and then a squeegee or the like is pressed onto the substrate via the mesh screen to transfer the UV-curing ink.

[0097] Next, the UV-curable ink transferred onto the substrate was irradiated with ultraviolet light using a metal halide lamp as the light source. The intensity of the irradiated UV rays was 300 mJ / cm². 2 The cumulative amount of ultraviolet light was 50 mJ / cm². 2 That was the case.

[0098] In the resulting functional seal for vehicles, the thickness of the ink layer was 50 μm, and the width of portion 104 was 300 μm.

[0099] (Examples 2-6, Comparative Examples 1-8) Except for changing the manufacturing conditions as shown in Tables 1 and 2, the production of functional seals for vehicles was carried out in the same manner as in Example 1, and functional seals for vehicles of Examples 2-6 and Comparative Examples 1-8 were obtained.

[0100] [6] Rating The vehicle functional seals manufactured by the vehicle functional seal manufacturing methods described in each of the above embodiments and comparative examples were evaluated as follows.

[0101] [6-1] Print accuracy evaluation The ink layer was observed using a micrometer, the amount of deviation from the reference position (plate) was measured, and the results were evaluated according to the following criteria.

[0102] ◎: The amount of misalignment relative to the width of the print pattern is less than 10%. ○: The amount of misalignment relative to the width of the print pattern is 10% or more but less than 20%. △: The amount of misalignment relative to the width of the print pattern is 20% or more but less than 30%. ×: The misalignment is 30% or more relative to the width of the print pattern.

[0103] [6-2] Aerodynamic Stability Evaluation The manufactured vehicle functional seals were attached to designated parts of the vehicle (Ft bumper A1, Ft fender A2, roof A3, and C pillar A4 in Figure 4), and the vehicle was actually driven and evaluated according to the following criteria.

[0104] ◎: I felt that it was "running very stably." ○: I felt that it was running stably. △: "It runs stably, but it's somewhat difficult to feel the effect." ×: I felt that I "did not experience any noticeable effects."

[0105] [Table 1]

[0106] [Table 2]

[0107] [7] Overall rating As shown in Table 1, in Examples 1 to 5, a mesh screen with a mesh count of 70 to 250, a wire diameter of 40 μm to 71 μm, and an opening of 65 μm to 292 μm was used, and an emulsion layer thickness of 45 μm to 55 μm was used. Furthermore, a UV-curable ink with a viscosity at room temperature of 2000 mPa to 100000 mPa before curing was used. As a result, the resulting functional seals for vehicles exhibit excellent functionality.

[0108] On the other hand, as shown in Table 2, in Comparative Examples 1 to 8, the above conditions were not satisfied, and therefore the resulting vehicle functional seals could not exhibit superior functionality. [Explanation of symbols]

[0109] 1: Printing Unit 2: Mesh screen 3: Emulsion layer 4: Emulsion layer forming section 5: UV-curing ink 6: Ink filling section 7: Transfer section 8: Hardened part 10: Laminate 21:Wire rod 22 :Aperture 31 :Aperture 100: Functional seals for vehicles 101: Base material 102: Ink layer 103: Adhesive layer 104 :part A1: Front bumper A2: Ft Fender A3: Roof A4: C-pillar D: wire diameter O: Opening T1: Thickness T2: Thickness W: Width

Claims

1. A method for manufacturing a functional seal for vehicles, comprising a substrate and an ink layer of the UV-curable ink on the substrate, by screen printing using UV-curable ink, A first step is to obtain a laminate by forming an emulsion layer in a predetermined pattern containing an emulsion and having a thickness of 45 μm to 55 μm on a mesh screen having a mesh count of 70 to 250, a wire diameter of 40 μm to 71 μm, and an opening of 65 μm to 292 μm, A second step involves filling the gaps in the pattern of the emulsion layer with the UV-curable ink before curing, which has a viscosity of 2,000 mPa or more and 100,000 mPa or less at room temperature. A method for manufacturing a functional seal for vehicles, comprising a third step of bringing the substrate and the laminate into close contact and transferring the uncured UV-curable ink, which is filled in the gaps of the pattern of the emulsion layer, onto the substrate.

2. The mesh screen has an opening of 70 μm or more and 280 μm or less, and a wire diameter of 43 μm or more and 65 μm or less. The thickness of the emulsion layer is 48 μm or more and 52 μm or less. The method for manufacturing a functional seal for vehicles according to claim 1, wherein the viscosity of the UV-curable ink at room temperature before curing is 3,000 mPa or more and 50,000 mPa or less.

3. The process is carried out after the third step, and includes a fourth step of curing the UV-curable ink transferred onto the substrate by irradiating it with ultraviolet light, The intensity of the UV rays irradiated in the fourth step is 280 mJ / cm². ２ More than 320mJ / cm ２ The method for manufacturing a vehicle functional seal according to claim 1, which is as follows:

4. A functional seal for vehicles that is attached to a designated part of a vehicle, Substrate and An adhesive layer provided on one side of the substrate, The substrate is provided on the other side and comprises an ink layer made of UV-curable ink, The ink layer has a predetermined pattern, A functional seal for vehicles, characterized in that the thickness of the ink layer is 20 μm or more and 60 μm or less.

5. The aforementioned predetermined pattern has linear portions, The functional seal for vehicles according to claim 4, wherein the width of the aforementioned portion is 300 μm or more and 700 μm or less.

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