Infrared-light-transmitting ink of dark color, and infrared-light-reflecting sheet obtained using same
AssigneeDai Nippon Printing Co., Ltd.
InventorsNaoto Yamanaka, Hitoshi Nishikawa, Keita Arihara
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Abstract
In order to satisfy the demand of consumers regarding design attractiveness, an infrared-light-transmitting dark color ink is provided, the ink having a black appearance and attaining high design attractiveness and, despite this, having sufficient infrared-light-transmitting property. The infrared-light-transmitting dark color ink transmits near infrared light having wavelengths of 750-1,500 nm, and comprises a resin component and a pigment component that comprises both a brown pigment, e.g., a benzimidazolone pigment, and a phthalocyanine pigment.
Claims20
An infrared-light-reflecting sheet comprising an infrared-light-transmitting dark color layer and a reflective layer,
- wherein a thickness of the infrared-light-transmitting dark color layer is about 10 μm or less, and
- a color difference (ΔE*ab) between a color tone of the infrared-light-reflecting sheet and a color tone of carbon black (a* is 0.15, b* is −0.48) as measured under conditions of a D65 light source and a 10° view angle is about 7 or less,
- wherein an average reflection rate of the infrared-light-reflecting sheet is 10% or less when light having a wavelength of 380 nm to 750 nm is incident to the infrared-light-reflecting sheet, and
- a reflection rate of the infrared-light-reflecting sheet is 50% or less when light having a wavelength of 750 nm is incident to the infrared-light-reflecting sheet.
An infrared-light-reflecting sheet comprising an infrared-light-transmitting dark color layer and a reflective layer,
- wherein a coating amount of the infrared-light-transmitting dark color layer is about 10 g/m2 or less, and
- a color difference (ΔE*ab) between a color tone of the infrared-light-reflecting sheet and a color tone of carbon black (a* is 0.15, b* is −0.48) as measured under conditions of a D65 light source and a 10° view angle is about 7 or less
- wherein an average reflection rate of the infrared-light-reflecting sheet is 10% or less when light having a wavelength of 380 nm to 750 nm is incident to the infrared-light-reflecting sheet, and
- a reflection rate of the infrared-light-reflecting sheet is 50% or less when light having a wavelength of 750 nm is incident to the infrared-light-reflecting sheet.
An infrared-light-reflecting sheet comprising an infrared-light-transmitting dark color layer and a reflective layer,
- wherein the infrared-light-transmitting dark color layer has a pigment component of 20 to 40 parts by mass with respect to 100 parts by mass of a resin component, and
- a color difference (ΔE*ab) between a color tone of the infrared-light-reflecting sheet and a color tone of carbon black (a* is 0.15, b* is −0.48) as measured under conditions of a D65 light source and a 10° view angle is about 7 or less,
- wherein an average reflection rate of the infrared-light-reflecting sheet is 10% or less when light having a wavelength of 380 nm to 750 nm is incident to the infrared-light-reflecting sheet, and
- a reflection rate of the infrared-light-reflecting sheet is 50% or less when light having a wavelength of 750 nm is incident to the infrared-light-reflecting sheet.
Dependencies are inferred from the claim text.