Colored polymer sheet

Abstract

To provide a colored polymer sheet that is used as a surface layer material of an automotive member, has a color tone of Piano Black, allows passage of a visible light beam emitted by an LED surface light source, can be easily produced, and also has a simple structure.SOLUTION: A colored polymer sheet 1 is used in a surface layer of an automotive member and has a color tone of Piano Black. Adjusting the density of a black dye 31 and a black pigment 32 and the thickness of a sheet 1 causes an LED surface light source 2 of red, green, blue or white color having an illuminance equal to or higher than a predetermined value to come into contact with one side of the sheet 1. In addition, a transmittance equal to or higher than a predetermined value is set for the colored polymer sheet 1.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention is directed to a colored polymer sheet having a piano black color tone that is used on the surface of automotive members and can transmit an LED surface light source at a predetermined transmittance.

Background Art

[0002] Automotive members, which are composed of interior and exterior members that are visual targets for a person riding in an automobile (hereinafter abbreviated as "rider"), such as door trims, center panels, and various displays in front of the driver's seat, are usually formed of three-dimensional plastic moldings. However, various ideas have been accumulated in the design of such automotive members, and various decoration techniques are also evolving for the surface layer of the three-dimensional molding.

[0003] As the color tone on the surface layer, piano black, which gives a calm impression, is preferably adopted. In most cases, however, this color tone is realized by printing such as gravure printing.

[0004] On the other hand, in Patent Document 1, a piano black two-layer colored sheet is formed by integrating a piano black colored polymer as the first layer and a pigment-colored ABS black colored polymer as the second layer by a two-layer extrusion molding method, and a predetermined urethane-modified acrylic paint is applied to the surface of the first layer to form a protective coating film. A configuration using a composite colored sheet is adopted.

[0005] However, such a laminated sheet is quite complicated to manufacture.

[0006] Moreover, no device has been made to appeal to the rider's vision by bringing a light source into contact with one side of the colored sheet.

[0007] On the other hand, in Patent Document 2, an acrylic laser marking resin composition containing 0.0005 to 5% by mass of a laser light energy absorber in a mixed resin of an acrylic resin and a transparent ABS resin is adopted to enable display with white characters on in-vehicle members and the like.

[0008] However, for the surface layer of automotive members, a black color tone is preferable, and the above-mentioned transparent members are not at all preferable color tones.

[0009] Moreover, in the case of laser light, a large-scale light-emitting device is required, which is extremely inappropriate and inconvenient to arrange in an automobile.

[0010] Patent Document 3 targets a headset instead of the surface layer of automotive members, and adopts a black plastic material that transmits infrared light on the outer side surfaces of the housing cases 1R and 1L that contact the left and right ears (paragraph

[0016] ).

[0011] However, Patent Document 3 does not explain at all about the transmission of visible light and further the transmittance that appeals to the vision of passengers.

[0012] Thus, a configuration that has a basic color tone of piano black for the surface layer of automotive members, and enables a predetermined character and / or figure to appeal to the vision of passengers by the display of transmitted light sources, and is easy and simple to manufacture has not been proposed so far.

Prior Art Documents

Patent Documents

[0013]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0014] The present invention aims to provide a colored polymer sheet that is used as a surface material for automotive members, has a piano black color tone, allows visible light emitted from an LED surface light source to pass through, is easy to manufacture, and has a simple structure.

Means for Solving the Problems

[0015] To solve the above problems, the basic configuration of the present invention is as follows: (1) A colored polymer sheet used on the surface of an automotive member and having a By virtue of the thickness of the sheet containing 0.3 to 1.2% by weight of a black dye having an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment having an average particle size of 10 μm or less being in the range of 0.2 to 0.5 mm piano black color tone, wherein a planar red LED surface light source with an illuminance of 2.20 lumens / mm or more on one side of the sheet and forming a predetermined figure is in contact therewith, and the transmittance is set to 0.0009 or more. By a single layer colored polymer sheet, 2 and Use and the transmittance is set to 0.0009 or more. (2) A colored polymer sheet used on the surface of an automotive member and having a By virtue of the thickness of the sheet containing 0.3 to 1.2% by weight of a black dye having an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment having an average particle size of 10 μm or less being in the range of 0.2 to 0.5 mm piano black color tone, wherein a planar green LED surface light source with an illuminance of 4.12 lumens / mm or more on one side of the sheet and forming a predetermined figure is in contact therewith, and the transmittance is set to 0.0009 or more. By a single layer colored polymer sheet, 2 and Use and the transmittance is set to 0.0009 or more. (3) A colored polymer sheet used on the surface of an automotive member and having a By virtue of the thickness of the sheet containing 0.3 to 1.2% by weight of a black dye having an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment having an average particle size of 10 μm or less being in the range of 0.2 to 0.5 mm piano black color tone, wherein a planar blue LED surface light source with an illuminance of 1.10 lumens / mm or more on one side of the sheet and forming a predetermined figure is in contact therewith, and the transmittance is set to 0.0013 or more. By a single layer colored polymer sheet, 2 and Use and the transmittance is set to 0.0013 or more. (4) A colored polymer sheet used on the surface of an automotive member and having a By virtue of the thickness of the sheet containing 0.3 to 1.2% by weight of a black dye having an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment having an average particle size of 10 μm or less being in the range of 0.2 to 0.5 mm piano black color tone, By a single layerA colored polymer sheet, on one side of which the illuminance is 2.48 lumens / mm 2 or more, and a planar white LED surface light source forming a predetermined figure is in contact with it, Use and and a colored polymer sheet having a transmittance set to 0.0010 or more, is composed of.

Advantages of the Invention

[0016] In the basic configurations (1), (2), (3), and (4), based on a colored polymer sheet with a color tone of piano black, i.e., a black gloss like the surface of a piano, on one side of the colored polymer sheet, a red LED surface light source with an illuminance of 2.20 lumens / mm 2 or more, or a green LED surface light source with an illuminance of 4.12 lumens / mm 2 or more, or a blue LED surface light source with an illuminance of 1.10 lumens / mm 2 or more, or a white LED surface light source with an illuminance of 2.48 lumens / mm 2 or more is planned to be in contact, and by setting the transmittance to 0.0009 or more, or 0.0009 or more, or 0.0013 or more, or 0.0010 or more respectively, on the surface layer of an automotive member, characters and / or figures displayed on the surface of the respective color LED surface light sources formed by any of the above color LED surface light sources, or characters and / or figures displayed in the transmitted light region of the colored polymer sheet can be made to appeal to the visual sense of the vehicle occupants.

[0017] As will be described below in accordance with the test results, in the basic configurations (1), (2), (3), and (4), the respective colors of the red, green, blue, and white LED surface light sources can be transmitted through the colored polymer sheet with piano black without changing color.

[0018] Furthermore, according to the test results, in the basic configurations (1), (2), (3), and (4), a red LED surface light source with an illuminance of 2.20 lumens / mm 2 or a green LED surface light source with an illuminance of 4.12 lumens / mm 2A green LED surface light source, or an illuminance of 1.10 lumens / mm 2 A blue LED surface light source, or an illuminance of 2.48 lumens / mm 2 When each light ray from a white LED surface light source is transmitted, if the minimum value of the transmittance of each light ray is 0.0009, or 0.0009, or 0.0013, or 0.0010, respectively, it is verified that a predetermined character and / or figure can be visually recognized even at a position 400 mm away. The basis for enabling such visual recognition is that the surroundings of the transmitted light rays of each color are piano black, so the contrast with the light rays of each color is clear.

[0019] Moreover, according to the basic configurations (1), (2), (3), (4) By a single layer The colored polymer sheet has a simple configuration of simply containing a black dye and a black pigment in the polymer. On the other hand, the molten polymer containing these dyes and pigments can be formed by extrusion molding, and the manufacturing method is extremely easy.

[0020] In addition to the above effects, in the basic configurations (1), (2), (3), (4), a decorative effect can be exerted in which a predetermined figure is displayed by the transmitted light rays themselves by the planar LED surface light source itself.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

BEST MODE FOR CARRYING OUT THE INVENTION

[0022] The colored polymer sheet 1 having a piano black color tone according to the basic configurations (1), (2), (3), and (4) can be manufactured by blending both a black dye 31 and a black pigment 32 in the colored polymer sheet 1 as shown in the cross-sectional view of FIG. 1. However, in order to manufacture a piano black having gloss, the colored polymer sheet 1 has a predetermined thickness, specifically Being in the range of 0.2 to 0.5 mm this, and the black dye 31 Whose average particle size is 1 μm or less, The average particle diameter of the black pigment 32 is 10 μm or less is essential. Typical examples of the black dye 31 are NUBIAN BLACK manufactured by Orient Chemical Industries, Ltd. (note that “NUBIAN” is a trademark name), and a typical example of the black pigment 32 is carbon black.

[0023] In the basic configurations (1), (2), (3), and (4), the concentrations of the black dye 31 and the black pigment 32 and the thickness Being in the range of 0.2 to 0.5 mm of the sheet 1 are required. However, it is a natural technical matter that the higher the concentration and the greater the thickness, the lower the transmittance of the sheet 1.

[0024] The basic configurations (1), (2), (3), and (4) further require that the illuminances of the red LED surface light source 2, the green LED surface light source 2, the blue LED surface light source 2, and the white LED surface light source 2 are equal to or greater than a predetermined value, and the transmittance is a predetermined value. These numerical requirements correspond to the requirements necessary for a passenger to easily visually recognize the display on the surface layer of the automotive member.

[0025] The basic configurations (1), (2), (3), and (4) have a planar LED surface light source 2 Using it to abut against as shown in FIG. 3.

[0026] Hereinafter, the Regarding illuminance numerical requirements Regarding the correctness or incorrectness thereof, based on the numerical ranges of the average particle size, weight percentage of the black dye 31, the average particle size, concentration of the black pigment 32, and the thickness of the single-layered colored polymer sheet 1 of the basic configurations (1), (2), (3), and (4) will be described in accordance with the test results.

[0027] As shown in FIG. 2, for each sample of the colored polymer sheet 1, with a red, or green, or blue LED surface light source 2 having a predetermined illuminance in a contacting state, a luminance measuring instrument 4 is disposed at a distance of 400 mm from the surface of the sheet 1 in a direction orthogonal to the direction of the sheet 1, and a surface is set where the LED light of each color is incident.

[0028] As the LED surface light source 2, NESR157, which is a red LED manufactured by Nichia Chemical Industries, Ltd., NESG157, which is a green LED, and NESB157, which is a blue LED, are respectively adopted. As samples of the colored polymer sheet 1, colored polymer sheets 1 presenting piano black and made of acrylic with thicknesses of 0.2 mm, 0.3 mm, 0.4 mm, and 0.5 mm are adopted. On the other hand, as a sample for comparison, a black plate presenting complete black instead of piano black and having a thickness of 1.0 mm is adopted.

[0029] The light emitting area of each of the LED surface light sources 2 is a rectangle of 2.6 mm × 1.4 mm, and the area of the rectangle is 3.64 mm 2 is.

[0030] According to the description in the pamphlet made by Nichia Chemical Industries, Ltd., the luminous flux emitted by NESR157 is 8.0 lumens, the luminous flux emitted by NESG157 is 15.0 lumens, and the luminous flux emitted by NESB157 is 4.0 lumens.

[0031] Therefore, the illuminance of NESR157, NESG157, and NESB157, by dividing by the area of 3.64 mm 2 is respectively 2.20 lumens / mm 2 4.12 lumens / mm 2 1.10 lumens / mm 2 is.

[0032] In each of the samples, the white LED surface light source 2 was not used. The reason is that there was no product of the white LED surface light source 2 similar to the products of the three types of LED surface light sources 2.

[0033] However, when the light-emitting materials used in NESR157, NESG157, and NESB157 were mixed in equal amounts and formulated to form a rectangle of 3.64 mm 2 white light was emitted, and it was clearly inferred that the illuminance was formed to be 2.48 lumens / mm, which is the average value of the respective illuminances. (Note that the value of 2.48 is the value obtained by rounding up three decimal places.) 2

[0034] The degrees of luminance obtained under each of the samples and measurement conditions are as shown in Table 1 below.

[0035]

Table 1

[0036] The transmittance is expressed by a value obtained by dividing the luminous flux of the LED surface light source 2 by each color after transmission by the luminous flux of the LED surface light source 2 by each color before transmission. However, the unit of luminance in Table 1 is cd / m 2 and does not represent the luminous flux itself with lumen as the unit.

[0037] Specifically, the luminance is based on a value obtained by dividing the cd (candela), which is the unit of luminous intensity, by the distance of 400 mm = 0.4 m after passing through each sample.

[0038] However, the luminous intensity is calculated by luminous flux / solid angle, and in the test shown in FIG. 2, the distance from each color LED surface light source 2 to the measuring instrument 4, that is, 0.4 m and the conditions of the solid angle in which the light rays from the LED surface light source 2 are diffused are common to each sample.

[0039] Therefore, the value obtained by dividing the luminance of each sample by the luminance without a sample inevitably corresponds to the transmittance based on the ratio of the luminous flux before and after transmission in each sample.

[0040] The transmittance of each sample based on Table 1 is as shown in Table 2 below.

[0041]

Table 2

[0042] Table 2 shows that in the case of a black plate not corresponding to the piano black sheet, the transmittance is extremely small and it can never be adopted as the surface material of automotive interior materials.

[0043] As shown in Table 2, the transmittance shows the order of blue LED > green LED > red LED. The reason is that generally, the smaller the wavelength, the better the transmittance.

[0044] Among the samples of the colored polymer sheet 1 which is each piano black sheet, even in the case of the sample with a thickness of 0.5 mm, according to the visual inspection of the 3 persons who witnessed the test, the surface light sources 2 of the three colors of red, green, and blue could be confirmed at a position 400 mm away.

[0045] Furthermore, in the case of samples with thicknesses of 0.4 mm, 0.3 mm, and 0.2 mm, the confirmation was extremely clear and remarkable. Therefore, it is an obvious conclusion that the same confirmation is possible also in the white LED surface light source 2 by equally distributing the three types of light-emitting materials of red, green, and blue.

[0046] The numerical value of the transmittance regarding the sample with a thickness of 0.5 mm shown in Table 2 In the red LED surface light source 2, as in the basic configuration (1), the illuminance is 2.20 lumens / mm 2When it abuts on the colored polymer sheet 1 in the state of , when the transmittance is 0.0009 or more, the transmission state of the LED light can be visually observed at a position 400 mm away. In the green LED surface light source 2 as in the basic configuration (2), the illuminance is 4.12 lumens / mm 2 By abutting on the colored polymer sheet 1 in the state of , when the transmittance is 0.0009 or more, the transmission state of the LED light can be visually observed at a position 400 mm away. In the blue LED surface light source 2 as in the basic configuration (3), the illuminance is 1.10 lumens / mm 2 When it abuts on the colored polymer sheet 1 in the state of , when the transmittance is 0.0013 or more, the transmission state of the LED light can be visually observed at a position 400 mm away. In the white LED surface light source 2 as in the basic configuration (4), 2.48 lumens / mm which is slightly higher than the average value of the three illuminances 2 When it abuts on the colored polymer sheet 1 in the state of , it is confirmed that when the transmittance is 0.0010 or more, which is higher than 0.00097, the average value of the transmittances of the three types of samples, the transmission state of the LED light can be visually observed at a position 400 mm away.

[0047] Among the possibilities of the above visual observation, each sample of red, green, and blue is based on experimental data, while in the case of the white sample, it is based on a clear estimation by the average value. However, even if such an estimation is disregarded, in the case of the white LED surface light source 2, similar to the blue LED surface light source 2, when a transmittance of 0.0013 or more is adopted, it is obvious that the above visual observation is possible.

[0048] The average value of the distance between the automotive member arranged and the driver in the vehicle is approximately 400 mm or less.

[0049] Therefore, in the basic configurations (1), (2), (3), and (4) based on the above test results, when predetermined characters and / or figures are displayed on the surface of the LED surface light sources 2 of each color, or when predetermined characters and / or figures are displayed on the colored polymer sheet 1 having a piano black color tone, it is found that the characters and / or figures can be visually recognized. In addition, each of the above displays is realized by ordinary printing.

[0050] According to Table 2, the transmittance for each of the red, green, and blue colors has not changed significantly.

[0051] Such a state verifies that in the colored polymer sheet 1 having a piano black color tone, the reproducibility of each color emitted from each LED surface light source 2 is extremely good. Such good reproducibility is inevitably applicable also to white light formed by mixing red light, green light, and blue light.

[0052] Regarding the concentration and thickness of the black dye 31 and the black pigment 32 in the basic configurations (1), (2), (3), (4) A typical example of the embodiment is characterized in that the concentration of the black dye 31 is 0.6% by weight, the concentration of the black pigment 32 is 0.05% by weight, and the thickness of the sheet 1 is 0.3 mm.

[0053] In the said typical example, under the numerical requirements of the basic configurations (1), (2), (3), and (4), a vehicle occupant can visually recognize the characters and / or figures displayed on the LED surface light sources 2 of each color, or the characters and / or figures displayed on each colored polymer sheet 1, against the vivid contrast with the surrounding piano black.

[0054] A typical example of the material of the colored polymer sheet 1 is an acrylic resin. However, among acrylic resins, particularly in the case of a mixed polymer of a methacrylic resin and an acrylic rubber-containing polymer as in Patent Document 1, a uniform molten state with the black dye 31 and the black pigment 32 can be realized, and a rich piano black in terms of quality can be realized.

[0055] Furthermore, as the colored polymer sheet 1, in addition to the above-mentioned mixed polymer, a blend polymer of an ABS resin (Acrylonitrile Butadiene Styrene Polymer) and an acrylic resin, as described in Patent Document 2, can also be adopted.

[0056] The shapes of automotive components are often extremely complex.

[0057] In the basic configurations (1), (2), (3), and (4) used for the surface layer of such complex shapes, the colored polymer sheet 1 generally adopts a flexible film shape in most cases.

Industrial Applicability

[0058] As described above, the present invention can exhibit the characteristic effects as already explained by being used together with the LED surface light source as a decorative sheet for the surface layer of automotive components having various shapes. As a result, an extremely wide range of applications can be realized.

Explanation of Reference Numerals

[0059] 1 Colored polymer sheet 2 LED surface light source 31 Black dye 32 Black pigment 4 Measuring instrument

Claims

Claim 1 A colored polymer sheet with a single layer having a piano black color tone, which is used on the surface layer of automotive parts, contains 0.3 to 1.2% by weight of a black dye with an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment with an average particle size of 10 μm or less, and has a thickness in the range of 0.2 to 0.5 mm. On one side of the sheet, the illuminance is 2.20 lumens / mm ２ or more, and is used for abutting a planar red LED surface light source that forms a predetermined figure, and the colored polymer sheet has a transmittance set to 0.0009 or more. Claim 2 A colored polymer sheet with a single layer having a piano black color tone, which is used on the surface of automotive parts and contains 0.3 to 1.2% by weight of a black dye having an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment having an average particle size of 10 μm or less, and the thickness of the sheet is in the range of 0.2 to 0.5 mm. On one side of the sheet, the illuminance is 4.12 lumens / mm ２ The colored polymer sheet is used for abutting a planar green LED surface light source having an illuminance of 4.12 lumens / mm or more and forming a predetermined figure, and the transmittance is set to 0.0009 or more. Claim 3 A single-layer colored polymer sheet having a piano black color tone, which is used for the surface layer of automotive parts, contains 0.3 to 1.2% by weight of a black dye having an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment having an average particle size of 10 μm or less, and the thickness of the sheet is in the range of 0.2 to 0.5 mm. The illuminance on one side of the sheet is 1.10 lumens / mm ２ above, and is used for abutting against a planar blue LED surface light source forming a predetermined figure, and the colored polymer sheet having a transmittance set to 0.0013 or more. Claim 4 A colored polymer sheet with a single layer having a piano black color tone, which is used for the surface layer of automotive parts, contains 0.3 to 1.2% by weight of a black dye having an average particle size of 1 μm or less and 0.025 to 0.10% by weight of a black pigment having an average particle size of 10 μm or less, and has a thickness in the range of 0.2 to 0.5 mm. On one side of the sheet, the illuminance is 2.48 lumens / mm ２ The colored polymer sheet is used for abutting a planar white LED surface light source having an illuminance of 2.48 lumens / mm or more and forming a predetermined figure, and has a transmittance set to 0.0010 or more. Claim 5 The colored polymer sheet according to claim 4, characterized in that the transmittance can be set to 0.0013 or more. Claim 6 The colored polymer sheet according to any one of claims 1, 2, 3, and 4, characterized in that the concentration of the black dye is 0.6% by weight, the concentration of the black pigment is 0.05% by weight, and the thickness of the sheet is 0.3 mm. Claim 7 The colored polymer sheet according to any one of claims 1, 2, 3, and 4, characterized in that the material of the colored polymer sheet is an acrylic resin. Claim 8 The colored polymer sheet according to claim 7, characterized in that the acrylic resin is a mixed polymer comprising 60 to 80% by weight of a methacrylic resin and 40 to 20% by weight of an acrylic rubber-containing polymer. Claim 9 The colored polymer sheet according to any one of claims 1, 2, 3, and 4, characterized in that it adopts a flexible film shape.

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