Electromagnetic wave-permeable brilliant coated resin product and manufacturing method therefor

1. An electromagnetic millimeter wave-permeable brilliant coated resin product comprising:

a brilliant coating film having electromagnetic wave permeability and a thickness of 23 μm to 40 μm and comprising a coating composition provided on a resin substrate directly or on another coating film provided on the substrate, the coating composition comprising a planar brightening material formed from aluminum and 1 to 20 mass % of a planar non-conductive selected from the group consisting of a glass flake and a pearl mica,

wherein:

within the brilliant coating film, the brightening material is oriented in a state such that a plane thereof is biased toward a direction that follows a surface of the brilliant coating film,

an average overlapping quantity (y), which is an average of a quantity of brightening material that crosses one orthogonal line that is orthogonal to the surface of the brilliant coating film that satisfies the following two formulae:

y≧0.5   (formula 1), and

y≦ 0.3969 x +0.594   (formula 2),

where, the unit for x is μm, and

the average inter-brightening material distance (x), which is an average of distances on the orthogonal line between adjacent brightening materials that cross said orthogonal line, that satisfies the following formula:

x≧3   (formula 3),

wherein the electromagnetic millimeter wave-permeable brilliant coated resin product has an intensity value (IV) of 142.5 to 205.1 that is achieved by satisfying formula 1 above, and

wherein the electromagnetic millimeter wave-permeable brilliant coated resin product has electromagnetic millimeter wave permeability that is achieved by satisfying formula 2 above.

2. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 1 , wherein the brightening material is ground aluminum that is formed by grinding an aluminum foil.

3. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 2 , wherein a content of the brightening material within the brilliant coating film is 2.5 to 10.0 mass %.

4. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 1 , wherein the brightening material is deposited aluminum that is formed by grinding an aluminum film formed by deposition.

5. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 4 , wherein a content of the brightening material within the brilliant coating film is 0.5 to 2.0 mass %.

6. The electromagnetic wave-permeable brilliant coated resin product according to claim 1 , wherein a product of a value indicating the mass % content of brightening material within the brilliant coating film and a value indicating a thickness of the brilliant coating film in units of μm is 100 or less.

7. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 1 , wherein a millimeter wave transmission attenuation amount of the coating film when the resin product is subjected to 76.575 GHz millimeter waves at an incident angle of 0 degrees at room temperature is 1 dB or less.

8. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 1 , wherein the average overlapping quantity (y) satisfies the formula:

y≧0.9.

9. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 1 , wherein the resin substrate is a member selected from the group consisting of polycarbonate (PC), acrylonitrile-ethylene-styrene (AES) copolymer and polypropylene (PP).

10. An electromagnetic millimeter wave-permeable brilliant coated resin product comprising:

a brilliant coating film permeable to electromagnetic millimeter waves and having a thickness of 23 μm to 40 μm, the brilliant coating film including:

a coating composition provided on a resin substrate directly or on another coating film provided on the substrate, the coating composition comprising a planar aluminum brightening material in an amount of 2.5 to 10 mass % and the brightening material being oriented in a plane within the brilliant coating film that is biased toward a direction following a surface of the brilliant coating film,

an average overlapping quantity (y), which is an average of a quantity of brightening material that crosses one orthogonal line that is orthogonal to the surface of the brilliant coating film, satisfying the following two formulae:

y≧0.5   (formula 1), and

y≦ 0.3969 x+ 0.594   (formula 2),

where, the unit for x is μm, and

the average inter-brightening material distance (x), which is an average of distances on the orthogonal line between adjacent brightening materials that cross said orthogonal line, satisfying the following formula:

x≧3   (formula 3).

wherein the electromagnetic millimeter wave-permeable brilliant coated resin product has an intensity value (IV) of 142.5 to 205.1.

11. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 10 , wherein the coating composition further comprises 1 to 20 mass % of a planar non-conductive pigment that increases the inter-brightening material distance (x), the planar non-conductive pigment is selected from the group consisting of a glass flake and a pearl mica.

12. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 10 , wherein a millimeter wave transmission attenuation amount of the coating film when the resin product is subjected to 76.575 GHz millimeter waves at an incident angle of 0 degrees at room temperature is 1 dB or less.

13. The electromagnetic millimeter wave-permeable brilliant coated resin product according to claim 10 , herein the average overlapping quantity (y) satisfies the formula:

y≧0.9