LIGHT REFLECTOR AND SURFACE LIGHT SOURCE APPARATUS

摘要

Disclosed is a light reflector having a substrate layer on which a gloss adjusting layer is formed as an outermost layer.  The surface of the gloss adjusting layer has a 45 degree glossiness in the range of 10 to 80 % and the ratio of 45 degree glossiness/85 degree glossiness is 2 to 25.  The light reflector meets the following <Requirement 1> or <Requirement 2>.  <Requirement 1> is defined by the fact that the gloss adjusting layer comprises (i) a thermoplastic resin and (ii) a filler having an average particle diameter of 2 to 20 µm; has a thickness of 2 to 20 µm; and is at least uniaxially oriented, and that the content of the filler (ii) in the gloss adjusting layer is in the range of 5 to 60 wt%.  <Requirement 2> is defined by the fact that the gloss adjusting layer is a coat layer including a filler, and the average inclination ?a and the reflectance, of the surface of the gloss adjusting layer are 0.04 to 0.2 and 90% or more, respectively.