Laminate, kit, method for producing laminate, and optical sensor
AssigneeFUJIFILM Corporation
InventorsYoshinori Taguchi, Keisuke Arimura
Life of this patent
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Abstract
Provided is a laminate having a good whiteness and a high infrared-shielding property. Provided are also a kit forming the above-mentioned laminate, a method for producing a laminate, and an optical sensor. The laminate includes an infrared-shielding layer and a white layer, in which the infrared-shielding layer is a layer that shields at least a part of a wavelength range at 800 to 1,500 nm, and the white layer has a value of L* of 35 to 100, a value of a* of −20 to 20, and a value of b* of −40 to 30 in a L*a*b* color coordinate system of CIE 1976.
Claims8
A kit for forming a laminate having an infrared-shielding layer and a white layer, comprising:
- a composition for forming an infrared-shielding layer containing a compound having a maximum absorption wavelength in a wavelength range at 800 to 1,500 nm;
- and
- a composition for forming a white layer, including a white pigment and having a value of L* of 35 to 75 in a L*a*b* color coordinate system of CIE 1976 in a case of forming a film with a thickness of 3 μm,
- wherein the composition for forming a white layer includes an alkali-soluble resin having an acid value of 30 to 120 mgKOH/g, a radically polymerizable compound having a molecular weight of 100 to 1,500, and a photopolymerization initiator.
An optical sensor comprising a laminate, wherein:
- the laminate comprises an infrared-shielding layer and a white layer,
- the infrared-shielding layer is a layer that shields at least a part of a wavelength range at 800 to 1,500 nm, and has an average transmittance in a wavelength range of 400 to 700 nm of 60% to 100%, and
- the white layer has a value of L* of 35 to 100, a value of a* of −20 to 20, and a value of b* of −40 to 30 in a L*a*b* color coordinate system of CIE 1976, and has an average transmittance in a wavelength range of 400 to 700 nm of 10% to 50%.
Dependencies are inferred from the claim text.