JP2013035127A - Decorative molding member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily realize a metallic polished surface with moderate luster and dull brightness by providing a decorative molding member whose appearance is designed into a metallic polished surface.SOLUTION: The decorative molding member 20 includes a base material 1 having a plurality of micro recessions 1a formed on its front face, a metal luster layer 2 formed on the front face of the base material 1 along the shape of the front face of the base material 1, and a surface layer 3 which is formed on the front face of the metal luster layer 2 and is made of a transparent or translucent resin layer. The area of each of the micro recessions 1a in a plan view is 10to 10μm. The area percentage of the micro recessions 1a per unit area in a plan view is 1 to 80%. The stimulus value (Y 45°) of the metal luster layer 2 based on the XYZ calorimetric system defined in JIS-Z-8701 is 10,000 or more. The surface roughness of the front face of the surface layer 3 is Ra2 μm or less and Rmax4 μm or less, or Sm50 μm or more.

Description

  The present invention belongs to the technical field of decorative molded members that can be used for automobile interior parts and the like.

  For example, there is a case where a metal design for producing a high-class feeling is required for automobile interior parts such as a door handle. For this reason, chrome plating having excellent luster, silver-satin-like satin plating, and the like are known. However, chrome plating has too high specularity and may not match the atmosphere in the automobile interior. On the other hand, satin plating has a calm texture, but the process is complicated.

  Accordingly, there is a need for a technique that easily realizes a polished metal surface design that is not too strong and shines dull. As one measure for that purpose, a decorative molded member is proposed in which the optical characteristics are close to the metal polished surface and the appearance exhibits a metal polished surface design. Such a decorative molded member, for example, prints or paints a layer having each function on a base material of a transfer film, or prints or paints a layer having each function on a clear film as a surface layer, and The obtained film structure can be easily obtained by transferring or adhering to the surface of the substrate. In the obtained decorative molded member, a film structure is formed on the surface side of the base material, and the base material is decorated with a polished metal surface. Or you may print or paint the layer which has each function of a film structure directly on the base-material surface.

  Patent Document 1 discloses that an optical thin film layer including a light absorbing layer composed of a high refractive index thin film layer, a low refractive index thin film layer, and / or a pure metal thin film layer is provided on a base material, whereby reflected brightness and reflected chroma are obtained. It is disclosed to obtain an optical thin film laminate including a light absorbing layer having a sufficiently large metallic luster. However, this technique is a technique for adding a metallic luster having a high reflection brightness to a substrate, and does not add a polished metal surface design with a suppressed gloss to the substrate.

JP 2009-83183 A (summary, FIGS. 1 to 5)

  An object of the present invention is to provide a decorative molded member whose appearance has a polished metal surface design, and to easily realize a polished metal surface design that is not too strong and shines dull.

One aspect of the present invention is a substrate having a plurality of fine recesses on the surface, a metallic gloss layer formed on the surface side of the substrate along the surface shape of the substrate, and formed on the surface side of the metallic gloss layer. A surface layer made of a transparent or translucent resin layer, the area of the fine recesses in a plan view is 10 ⁻³ to 10 ⁵ μm ² , and the area ratio of the fine recesses per unit area in the plan view is The stimulation value (Y45 °) in the XYZ color system defined by JIS-Z-8701 of the metallic gloss layer is 1 to 80%, and the surface roughness of the surface layer on the surface side is Ra 2 μm or less. And Rmax 4 μm or less or Sm 50 μm or more.

  Here, the stimulus value (Y45 °) of the metallic luster layer in the XYZ color system defined by JIS-Z-8701 is that the illumination optical axis angle with respect to the normal direction of the sample surface is −45 ± 2 °, and the light receiving reflection The Y value is calculated according to the definition of the tristimulus value of the object color by reflection in the XYZ color system defined by JIS-Z-8701, with the optical axis angle being 45 ± 2 °.

  According to this configuration, a part of the light incident on the decorative molded member from the surface layer side is diffusely reflected by the surface roughness on the surface side of the surface layer. The concave portions are formed by forming the metallic gloss layer along the surface shape of the base material, so that the shape of the fine concave portions on the surface of the base material appears on the surface of the metallic gloss layer. A part of the light is absorbed by the shadow, and a part of the metallic luster layer is specularly reflected (specular reflection). Also, part of the light is diffusely reflected by the peripheral edge of the fine concave portion of the metallic luster layer. A combination of such diffuse reflection, absorption, and regular reflection of light realizes a polished metal surface design that is not too glossy and shines dull, with optical properties close to the polished metal surface, and the appearance is polished metal surface. A decorative molded member having a design is obtained.

  In that case, by setting Ra (arithmetic mean roughness) to 2 μm or less as the surface roughness on the surface side of the surface layer, sufficient diffuse reflection for realizing the metal polished surface design can be surely obtained. Even when Rmax (maximum height) is set to 4 μm or less or Sm (average unevenness interval) is set to 50 μm or more, sufficient diffuse reflection for realizing a metal polished surface design can be reliably obtained.

  By setting the stimulus value (Y45 °) in the XYZ color system defined by JIS-Z-8701 of the metallic gloss layer to 10000 or more, sufficient regular reflection or metallic gloss to realize a polished metal surface design is achieved. It is definitely obtained.

By setting the area of the fine recesses on the substrate surface in plan view to 10 ⁻³ μm ² or more, the fine recesses do not become too small, and the light absorption due to the shadow of the metal gloss layer generated in the fine recesses on the surface of the metal gloss layer is reduced. Certainly achieved. By setting the area of the fine recesses on the substrate surface in a plan view to 10 ⁵ μm ² or less, the area ratio of the fine recesses on the substrate surface per unit area in a plan view is constant. Since the number increases, the peripheral length of the fine concave portion becomes long, and diffuse reflection by the peripheral portion of the fine concave portion on the surface of the metallic gloss layer is surely performed.

  By setting the area ratio of the fine recesses on the surface of the base material per unit area in a plan view to 1% or more, the area ratio of the fine recesses of the metal gloss layer per unit area in the plan view becomes sufficiently large, and the metallic gloss Since the shadow of the metallic luster layer generated in the fine recesses of the layer is sufficiently large, sufficient light absorption is surely achieved to realize a polished metal surface design that is not too strong and shines dull. By making the area ratio of the fine recesses on the surface of the substrate per unit area in plan view 80% or less, the area ratio of the fine recesses in the metallic luster layer per unit area in plan view does not become excessively large, Since the shadow of the metallic luster layer produced in the fine recesses of the metallic luster layer does not become excessively large, the light absorption does not become excessive, and the excessive brightness and / or stimulation value of the decorative molded member is suppressed.

The CIE 1976 brightness (L ^* ) defined by JIS-Z-8729 of the shadow of the metallic luster layer generated in the fine recesses of the metallic luster layer is preferably 80 or less. This is because sufficient light absorption can be surely achieved in order to realize a polished metal surface finish design that is not too strong and shines dull. More preferably, it is 50 or less.

Here, the CIE 1976 brightness (L ^* ) of the shadow defined in JIS-Z-8729 is in accordance with JIS-Z-8729, the geometric condition a defined in JIS-Z-8722 (illumination with respect to the normal direction of the sample surface) Optical axis angle: −45 ± 2 °, received / reflected optical axis angle: 0 ± 2 °).

  In the decorative molded member, the area ratio of the fine recesses on the surface of the base material is preferably 1 to 60%.

  According to this structure, light absorption does not become excessive too much and the fall of the excessive brightness and / or irritation | stimulation value of a decorative molding member is suppressed further.

  In the decorative molded member, the stimulation value (Y45 °) in the XYZ color system defined by JIS-Z-8701 of the metallic luster layer is preferably 20000 or more.

  According to this configuration, sufficient regular reflection or metallic luster to realize a polished metal surface design can be obtained more reliably.

  In the decorative molded member, the surface roughness of the surface layer on the surface side is preferably Ra 1 μm or less, Rmax 2 μm or less, or Sm 100 μm or more.

  According to this configuration, sufficient diffused reflection for realizing a polished metal surface design can be obtained more reliably.

  In the decorative molded member, the base material is preferably a resin molded member.

  According to this configuration, it is possible to increase the degree of freedom of the shape of the decorative molded member whose optical characteristics are close to those of a metal polished surface and whose appearance exhibits a metal polished surface design.

  According to the present invention, a decorative molded member having an appearance that exhibits a polished metal surface design is provided. Therefore, it is possible to easily realize a polished metal surface design that is not too strong and shines dull.

It is a longitudinal cross-sectional view which shows the layer structure of the decorative molding member which concerns on one Embodiment of this invention.

  The inventors of the present invention have repeatedly studied with the goal of realizing a metal polished surface design with a glossy texture that is not too strong and shining with a decorative molded member having a structure in which a plurality of functional layers are laminated on the substrate surface. It was. As a result, attention was paid to the fact that diffuse reflection, light absorption, and regular reflection (specular reflection) of light incident on the decorative molded member are important elements for realizing a polished metal surface design. The diffuse reflection can be reproduced by the surface roughness of the surface layer of the decorative molded member, the light absorption can be reproduced by the achromatic layer having relatively low brightness, and the regular reflection has a relatively high stimulus value. It has been found that reproduction is possible with a metallic luster layer. Further, as described later, it has been found that when the metallic gloss layer is configured to have fine concave portions, the diffuse reflection can be reproduced also by the peripheral portion of the fine concave portions of the metallic gloss layer.

  However, even if the surface layer is transparent or semi-transparent, it is difficult to obtain an appearance in which diffuse reflection, absorption, and regular reflection of light are mixed simply by laminating an achromatic layer and a metallic luster layer. For example, if a metallic luster layer is disposed under an achromatic layer, the metallic luster layer is hidden under the achromatic layer and is difficult to see, making it difficult to achieve regular reflection of light or metallic luster. Conversely, if an achromatic layer is disposed under the metallic gloss layer, the achromatic layer is hidden under the metallic gloss layer and is difficult to see, making it difficult to absorb light.

  Therefore, the present inventors omit the achromatic layer, and instead have a metallic gloss layer having a plurality of fine recesses, so that light is absorbed by the shadow of the metal gloss layer generated in the fine recesses. Inspired. Then, first, a metallic gloss layer was formed on the surface of the substrate, and an attempt was made to form fine concave portions in the metallic gloss layer. However, the fine concave portions were not formed in the metallic gloss layer so as not to deteriorate the appearance of the decorative molded member. It was difficult to form. After that, as a result of repeated trials, when a fine concave portion was previously formed on the surface of the base material and a metallic gloss layer was formed on the surface of the base material, the shape of the fine concave portion of the base material surface appeared on the surface of the metallic gloss layer. As a result, fine concave portions could be formed satisfactorily in the metallic luster layer so as not to deteriorate the appearance of the decorative molded member. As a result, it was possible to absorb light by the shadow of the metallic luster layer generated in the fine recesses of the metallic luster layer, and the achromatic layer could be omitted. The present invention has been completed based on such knowledge and ingenuity.

  That is, as shown in FIG. 1, the decorative molded member 20 according to this embodiment includes a base material 1 having a plurality of fine recesses 1 a... 1 a on the surface, and the base material 1 along the surface shape of the base material 1. A metallic luster layer 2 formed on the surface side and a surface layer 3 made of a transparent or translucent resin layer formed on the surface side of the metallic luster layer 2 are provided.

  Here, the surface layer 3 has a diffuse reflection function, the metallic gloss layer 2 has a regular reflection function and a diffuse reflection function, and the fine concave portions 2a... 2a of the metallic gloss layer 2 (the fine concave portions 2a. By forming the gloss layer 2 along the surface shape of the base material 1, the shape of the fine recesses 1a ... 1a on the surface of the base material 1 appears on the surface of the metal gloss layer 2. The shadow S of the gloss layer 2 has a light absorption function.

  With such a configuration, a part of the light incident on the decorative molded member 20 from the surface layer 3 side is diffusely reflected by the surface roughness of the surface layer 3, and enters the fine recesses 2 a of the metallic luster layer 2. A part of the light is absorbed by the shadow S of the metallic luster layer 2, part of the metallic luster layer 2 is specularly reflected (specular reflection), and part of it is diffusely reflected by the peripheral edge of the fine recess 2 a. A combination of such diffuse reflection, absorption, and regular reflection of light realizes a polished metal surface design that is not too glossy and shines dull, with optical properties close to the polished metal surface, and the appearance is polished metal surface. The decorative molded member 20 which exhibits a design is obtained.

  In this embodiment, the diffuse reflection function means that when visible light (wavelength: 420 to 670 nm, spread angle: substantially zero degree) incident from the outside at an incident angle of 45 degrees is reflected, 20% or more of the reflected light intensity is positive. A function of reflecting in a direction other than a direction within a reflection angle of ± 3 degrees. Alternatively, when visible light (wavelength: 380 to 780 nm, spread angle: substantially zero degree) incident from the outside at an incident angle of 90 degrees is transmitted, a direction within 5% of the transmitted light intensity is within a normal transmission direction angle of ± 3 degrees A function that changes the angle in a direction other than.

  In the present embodiment, the light absorption function refers to a function of absorbing or transmitting 20% or more of the intensity of visible light (wavelength: 420 to 670 nm, spread angle: substantially zero degree) incident from the outside at an incident angle of 90 degrees. Preferably, when the incident visible light is reflected, the difference in reflectance for each wavelength (420 to 670 nm) is within ± 10%.

  In the present embodiment, the regular reflection function means that when visible light (wavelength: 420 to 670 nm, spread angle: substantially zero degree) incident from the outside at an incident angle of 45 degrees is reflected, 90% or more of the reflected light intensity is positive. A function of reflecting in a direction within a reflection angle of ± 3 degrees.

In the present embodiment, the surface roughness (Ra, Rmax, Sm) on the surface side of the surface layer 3, the stimulation value of the metallic luster layer 2 (Y45 °), the area of the fine recess 1a on the surface of the substrate 1, the substrate 1 By adjusting the area ratio of the fine concave portion 1a on the surface and the brightness (L ^* ) of the shadow S generated in the fine concave portion 2a of the metallic luster layer 2, the diffuse reflection of light in the metal polished surface design of the decorative molded member 20 , Regular reflection of light, and absorption of light can be independently adjusted to desired values.

  In the present embodiment, the surface roughness of the surface layer 3 on the surface side is Ra 2 μm or less, Rmax 4 μm or less, or Sm 50 μm or more. By setting Ra (arithmetic mean roughness) to 2 μm or less, sufficient diffuse reflection can be reliably obtained to realize a polished metal surface design. Even when Rmax (maximum height) is set to 4 μm or less or Sm (average unevenness interval) is set to 50 μm or more, sufficient diffuse reflection for realizing a metal polished surface design can be reliably obtained.

  The surface roughness on the surface side of the surface layer 3 is more preferably Ra 1 μm or less, Rmax 2 μm or less, or Sm 100 μm or more. Thereby, sufficient diffuse reflection for realizing a polished metal surface design can be obtained more reliably.

  In this embodiment, the stimulus value (Y45 °) in the XYZ color system defined by JIS-Z-8701 of the metallic luster layer 2 is 10,000 or more. By setting the stimulation value (Y45 °) of the metallic luster layer 2 to 10,000 or more, sufficient regular reflection or metallic luster to achieve a polished metal surface design can be surely obtained.

  The stimulation value (Y45 °) of the metallic luster layer 2 is more preferably 20000 or more. Thereby, sufficient regular reflection thru | or metallic luster in order to implement | achieve a metal grinding | polishing surface design can be obtained more reliably.

In the present embodiment, the area of the fine recess 1a on the surface of the substrate 1 in plan view is 10 ⁻³ to 10 ⁵ μm ² . By setting the area of the fine recess 1a on the surface of the substrate 1 to 10 ⁻³ μm ² or more, the fine recess 1a does not become too small, and the shadow S of the metal gloss layer 2 generated in the fine recess 2a on the surface of the metal gloss layer 2 Absorption due to is reliably achieved. By setting the area of the fine recesses 1a on the surface of the base material 1 to 10 ⁵ μm ² or less, when the area ratio of the fine recesses 1a on the surface of the base material 1 per unit area in a plan view is constant, the fine recesses 1a Therefore, the peripheral length of the fine concave portion 1a is increased, and diffuse reflection by the peripheral portion of the fine concave portion 2a on the surface of the metallic gloss layer 2 is reliably performed.

  In the present embodiment, the area ratio of the fine recesses 1a on the surface of the substrate 1 per unit area in plan view is 1 to 80%. By setting the area ratio of the fine concave portions 1a on the surface of the substrate 1 to 1% or more, the area ratio of the fine concave portions 2a of the metallic gloss layer 2 per unit area in a plan view becomes sufficiently large, and the fineness of the metallic gloss layer 2 is increased. Since the shadow S of the metallic luster layer 2 generated in the recess 2a becomes sufficiently large, sufficient light absorption is reliably achieved to realize a polished metal surface design that is not too strong and shines dull. By setting the area ratio of the fine concave portions 1a on the surface of the substrate 1 to 80% or less, the area ratio of the fine concave portions 2a of the metallic gloss layer 2 per unit area in plan view is not excessively increased, and the metallic gloss layer 2 Since the shadow S of the metallic luster layer 2 generated in the fine concave portion 2a does not become excessively large, the light absorption does not become excessive, and the excessive brightness and / or stimulation value of the decorative molded member 20 is suppressed.

  The area ratio of the fine recesses 1a on the surface of the substrate 1 is more preferably 1 to 60%. Thereby, light absorption does not become excessive too much and the fall of the excessive brightness and / or irritation | stimulation value of the decorative molding member 20 is suppressed further.

In the present embodiment, the CIE 1976 brightness (L ^* ) defined by JIS-Z-8729 of the shadow S of the metallic luster layer 2 generated in the fine recess 2a of the metallic luster layer 2 is preferably 0 to 80. This is because, by setting the lightness (L ^* ) of the shadow S to 80 or less, sufficient light absorption can be surely achieved to realize a polished metal surface design that is not too strong and shines dull.

The lightness (L ^* ) of the shadow S is more preferably 0-50. Thereby, sufficient light absorption is achieved more reliably to realize a polished metal surface finish design that is not too strong and shines dull.

  In the present embodiment, the thicknesses of the surface layer 3 and the metallic luster layer 2 are not particularly limited. Depending on the situation, the thickness may be in the range of 1 μm to 1 mm, for example.

  The surface layer 3 may be colorless or colored as long as it is transparent or translucent. By adjusting the color of the surface layer 3, the kind of metal (for example, aluminum etc.) in the metal polishing surface design of the decorative molded member 20 can be adjusted to a desired one.

  The material of the metallic luster layer 2 is not particularly limited. For example, resin and metal are preferable. By adjusting the color of the metallic luster layer 2, the type of metal (for example, aluminum) in the metal polished surface design of the decorative molded member 20 can be adjusted to a desired one.

  In the present embodiment, the decorative molded member 20 can be easily obtained as follows. That is, the metallic luster layer 2 is formed on the surface of the substrate 1 having a plurality of fine recesses 1a... 1a on the surface by printing or painting along the surface shape of the substrate 1. Thereafter, the surface layer 3 is formed on the surface of the metallic luster layer 2 by printing or painting a transparent or translucent resin.

  In this way, the decorative molded member 20 having optical properties close to the metal polished surface and the appearance exhibiting a metal polished surface design is obtained. This decorative molded member 20 is suitable for automobile interior parts such as door handles, home appliance parts, personal computer parts, mobile phone parts, office parts, sports equipment parts, measuring equipment parts, miscellaneous goods parts, and the like.

  In the present embodiment, the substrate 1 is preferably a resin molded member. This is because the degree of freedom of the shape of the decorative molded member 20 whose optical characteristics are close to the metal polished surface and whose appearance exhibits the metal polished surface design can be increased.

  In FIG. 1, an adhesive layer (not shown) for bonding the metallic gloss layer 2 to the surface of the substrate 1 may be provided between the metallic gloss layer 2 and the surface of the substrate 1. Further, a protective layer (not shown) for preventing the metallic gloss layer 2 from being eroded or corroded by the adhesive layer may be provided between the metallic gloss layer 2 and the adhesive layer.

  Moreover, you may provide a transparent or semi-transparent, colorless or colored protective layer on the outer surface of the decorative molded member 20 as long as the effects of the present invention are not impaired. This protective layer is provided directly on the surface layer 3, for example. This protective layer is provided for protecting the surface of the decorative molded member 20. The protective layer may be provided to adjust the surface roughness (Ra, Rmax, Sm) on the surface side of the surface layer 3. Therefore, the surface roughness (Ra, Rmax, Sm) on the surface side of the surface layer 3 referred to in the present invention includes the surface roughness (Ra, Rmax, Sm) adjusted by this protective layer.

In order for the shadow S generated in the fine concave portion 2a of the metallic gloss layer 2 to have a light absorbing function sufficient to realize the metal polished surface design, the area of the fine concave portion 1a on the surface of the substrate 1 is as described above. In plan view, 10 ⁻³ μm ² or more is preferable, but 10 ² μm ² or more is more preferable, and 10 ³ μm ² or more is more preferable. The depth of the fine recess 1a on the surface of the substrate 1 or the depth of the fine recess 2a of the metallic luster layer 2 is preferably 1 μm or more, more preferably 5 μm or more, and further preferably 10 μm or more.

  Further, even if the incident angle of light is close to 0 ° or 90 °, a shadow S is generated in the fine concave portion 2a of the metallic gloss layer 2, so that the fine concave portion 1a on the surface of the substrate 1 or the fine concave portion of the metallic gloss layer 2 is formed. As shown in FIG. 1, it is preferable that 2a has a vertical wall parallel to the normal line of the surface of the decorative molded member 20 as a peripheral wall. Furthermore, the vertical wall as the peripheral wall may be inclined so that the peripheral edge of the fine recess 2a of the metallic luster layer 2 overhangs with respect to the fine recess 2a.

  The shape of the fine recess 1a on the surface of the substrate 1 or the fine recess 2a of the metallic luster layer 2 in a plan view is not particularly limited. Examples include a circle and a rectangle, and may be indefinite.

  The fine recesses 1a on the surface of the substrate 1 can be formed by a conventionally known physical or chemical roughening treatment such as shot blasting, sand blasting or etching.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited to the following examples.

[Production of decorative molded parts]
(Test numbers 1-6, 8-10)
A decorative molded member 20 having the configuration shown in FIG. 1 was produced according to the specifications shown in Table 1. As the base material 1, an achromatic ABS resin plate (plate thickness: 3 mm) was used, and fine concave portions 1a were formed on the surface of the base material 1 by an excimer laser. A metallic luster layer 2 (thickness 0.6 μm) was formed by spray coating on the surface of the substrate 1 on which the fine recesses 1a were formed. For the formation of the metallic luster layer 2, an ink “silver paste ink” manufactured by Harima Kasei Co., Ltd. was used. Next, the surface layer 3 (thickness 20 μm) was formed on the surface of the metallic gloss layer 2 by spray coating. For the formation of the surface layer 3, an ink “nax multi-eco clear” manufactured by Nippon Paint Co., Ltd. was used. As described above, the decorative molded member 20 exhibiting an aluminum polished surface appearance when observed from the surface layer 3 side was obtained.

(Test number 7)
A decorative molded member was produced in the same manner as in test numbers 1 to 6 and 8 to 10, except that the fine recesses 1a were not formed on the surface of the substrate 1.

(Test numbers 12, 13)
A decorative molded member 20 was produced in the same manner as in test numbers 1 to 6 and 8 to 10, except that high brightness silver ink manufactured by Nippon Bee Chemical Co., Ltd. was used for forming the metallic gloss layer 2.

(Test number 11)
A decorative molded member was produced in the same manner as in Test Nos. 12 and 13, except that the fine concave portion 1a was not formed on the surface of the substrate 1.

[Appearance evaluation of decorative molded parts]
The appearance of the produced decorative molded member 20 was optically evaluated. That is, the decorative molded member 20 is irradiated with visible light (wavelength: 420 to 670 nm, spread angle: substantially zero degree) from the surface layer 3 side at an incident angle of 45 degrees, and the stimulation value Y of the regular reflection angle, that is, regular reflection (mirror surface) Reflection) stimulus value (Y45 °) and regular reflection angle -5 ° stimulus value Y, that is, diffuse reflection stimulus value (Y40 °) is measured using a variable angle spectrophotometer manufactured by Murakami Color Research Laboratory. did. The results are shown in Table 1.

  Here, the specular reflection stimulus value (Y45 °) is JIS-Z-8701 where the illumination optical axis angle with respect to the normal direction of the sample surface is −45 ± 2 ° and the light reception / reflection optical axis angle is 45 ± 2 °. The Y value is calculated in accordance with the definition of the tristimulus value of the object color due to reflection in the XYZ color system defined by the above. Further, the diffuse reflection stimulation value (Y40 °) is JIS-Z-8701 with the illumination optical axis angle with respect to the normal direction of the sample surface set to −45 ± 2 ° and the received light reflection optical axis angle set to 40 ± 2 °. The Y value is calculated according to the definition of the tristimulus value of the object color due to reflection in the prescribed XYZ color system.

  In addition, when the stimulation value of specular reflection (Y45 °) and the diffuse reflection stimulation value (Y40 °) of the real aluminum polished surface and the satin plating were measured in the same manner, the specular reflection stimulation value of the aluminum polished surface ( Y45 °) is in the range of 35000-55000 (eg, 38306), the stimulus value for diffuse reflection (Y40 °) is in the range of 900-1300 (eg, 925), and the stimulus value for specular reflection of satin plating (Y45 °) is 10,000. The range of ˜75000 (for example, 31977) and the diffuse reflection stimulation value (Y40 °) were in the range of 900 to 2600 (for example, 1784).

  As is clear from Table 1, the decorative molded members 20 of test numbers 1 to 6, 8 to 10, 12, and 13 are compared with test numbers 7 and 11 in which the fine recesses 1a are not formed on the surface of the substrate 1. Is a specular reflection stimulus value (Y45 °), a diffuse reflection stimulus value (Y40 °), and / or a ratio of a diffuse reflection stimulus value (Y40 °) to a regular reflection stimulus value (Y45 °) (diffuse reflection stimulus value). (Y40 °) / regular reflection stimulation value (Y45 °)) was a value close to that of a real aluminum polished surface.

  The ratio of the diffuse reflection stimulation value (Y40 °) to the regular reflection stimulation value (Y45 °) (diffuse reflection stimulation value (Y40 °) / regular reflection stimulation value (Y45 °)) is 0.007 or more, or 0. 008 or more, or 0.01 or more is preferable, and 0.25 or less, or 0.13 or less, or 0.06 or less is preferable. If this ratio is too small, the gloss tends to be too strong for a dull texture. Conversely, if this ratio is too large, the dull and shiny texture tends to be excessive and the gloss tends to be too weak.

  Further, the regular reflection stimulation value (Y45 °) is preferably 4000 or more, or 7000 or more, or 10,000 or more, and preferably 100,000 or less, alternatively 75,000 or less, or 50,000 or less. When this value is too small, it tends to be too dark and the gloss is too weak. Conversely, if this value is too large, it tends to be too bright and too glossy.

  In particular, in order to realize a polished metal surface finish design that is not too strong and shines dull, the ratio of the diffuse reflection stimulus value (Y40 °) to the regular reflection stimulus value (Y45 °) (diffuse reflection stimulus value (Y40 (°) / regular reflex stimulus value (Y45 °)) is not too small (for example, not less than 0.007) is one of the important factors.

  The present invention has wide industrial applicability in the technical field of decorative molded members that can be used for automobile interior parts and the like.

DESCRIPTION OF SYMBOLS 1 Base material 1a Fine recessed part 2 Metal gloss layer 2a Fine recessed part 3 of metal gloss layer Surface layer 20 Decorating molding member S Shadow

Claims (5)

A substrate having a plurality of fine recesses on the surface;
A metallic luster layer formed on the surface side of the substrate along the surface shape of the substrate;
A surface layer made of a transparent or translucent resin layer formed on the surface side of the metallic luster layer,
The area of the fine recess in plan view is 10 ⁻³ to 10 ⁵ μm ² , and the area ratio of the fine recess per unit area in plan view is 1 to 80%,
The stimulation value (Y45 °) in the XYZ color system defined by JIS-Z-8701 of the metallic luster layer is 10,000 or more,
The surface roughness of the surface side of the surface layer is Ra 2 μm or less and Rmax 4 μm or less or Sm 50 μm or more,
Decorative molded member.   The decorative molded member according to claim 1, wherein the area ratio of the fine recesses is 1 to 60%.   The decorative molded member according to claim 1 or 2, wherein a stimulation value (Y45 °) in an XYZ color system defined by JIS-Z-8701 of the metallic luster layer is 20000 or more.   The decorative molded member according to any one of claims 1 to 3, wherein the surface roughness of the surface side of the surface layer is Ra 1 µm or less, Rmax 2 µm or less, or Sm 100 µm or more.   The decorative molded member according to any one of claims 1 to 4, wherein the base material is a resin molded member.

Images