| 摘要 |
PROBLEM TO BE SOLVED: To obtain a reflection sheet having a wide visible observation angle, high luminance and superior whiteness by having a binder layer, a layer of spherical or amorphous particles having a specific average particle size and a vapor deposited film layer on a base. SOLUTION: This reflection sheet has the binder layer 2, a layer 3 of the spherical or unshaped particles having a mean particle size of 5 to 150 μm and the vapor deposited film layer 4 in this order on the base 1. A biaxially stretched film of polyester, etc., which are stock mainly taking outdoor use into consideration are adequately used as the base 1. An acrylic adhesive, etc., are appropriately as the binder layer 2. Spherical or amorphorous particles are used as the shape of the fine particles forming the shape of the reflection layer on the base 1. The surface shape of the particles is preferably a shape, having ruggedness to give rise to the diffusion and reflection of incident light. Furthermore, the fine particles are in part exposed above from the surface of the binder layer 2, and about 80% of the grain size of the fine particles are preferably embedded into the binder layer 2 for forming the shape of the reflection layer on the base 1. |
