| 摘要 |
PROBLEM TO BE SOLVED: To provide a light diffusing resin molding for an illumination device which utilizes a vegetable-derived raw material being reduced in the environmental load, has moderate light transmitting properties and light diffusion properties, and also improved heat resistance. SOLUTION: The light diffusing resin molding 40 is formed by laminating a first layer (layer A) made of a first material 41 containing a vegetable-derived resin indicating crystallinity by heat treatment as a main component and a second layer (layer B) made of a the mixture of a second material 42 containing a resin not indicating crystallinity by the heat treatment making the first material 41 indicate crystallinity as a main component or the first material 41 and the second material 42. By the heat treatment making the first material 41 indicate crystallinity, the layer A is formed to indicate crystallinity, and the layer B is formed not to indicate crystallinity. The vegetable-derived resin with reduced environmental load is used as at least the first material 41. The first material 41 is crystallized to materialize proper light transmitting properties and light diffusing properties. The layer A is protected by the layer B, and the heat resistance of the light diffusing resin molding 40 is improved by the crystallization of the layer A. COPYRIGHT: (C)2009,JPO&INPIT
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