Patent ID: 7567381

Claim:
A plastic sheet having a thickness of from 1 to 5 mm, a haze of 80% or more and a total light transmittance of 80% or more, which comprises a three-layered sheet having a layered structure of diffuser layer B/diffuser layer A/diffuser layer B, or a five-layered sheet having a layered structure of diffuser layer A/diffuser layer B/diffuser layer A/diffuser layer B/diffuser layer A, the diffuser layer A comprising 100 parts by weight of a first matrix plastic and from 0.2 to 1.5 parts by weight of a first light-diffusing fine particle having an average particle size of from 2 to 6 μm and a refractive index of from X−0.02 to X+0.02 wherein X is a refractive index of the first matrix plastic; the diffuser layer B comprising 100 parts by weight of a second matrix plastic and from 10 to 30 parts by weight of a second light-diffusing fine particle having an average particle size of from 10 to 18 μm and a refractive index of from Y−0.03 to Y+0.03 wherein Y is a refractive index of the second matrix plastic.