| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a white laminate cycloolefin resin reflective material achieving excellent reflectivity, heat resistance and film forming stability, and in particular, preventing deterioration in product appearance and occurrence of breakage trouble in drawing film formation. <P>SOLUTION: The white laminate cycloolefin resin reflective material includes a multilayered structure of two or more layers wherein a resin layer B containing a cycloolefin resin is layered on at least one side of a resin layer A containing a cycloolefin resin and having minute cavities inside. Porosity of the resin layer A is higher than that of the resin layer B. <P>COPYRIGHT: (C)2011,JPO&INPIT |
