| 摘要 |
<p>An opaque, oriented polymeric film structure (10) is described. The film structure has a plurality of voids (12), at least some of the voids not containing a void-initiating particle (14) and at least some of the voids being interconnected with an adjacent void in the polymeric matrix material, the number of voids being sufficient to impart a significant degree of opacity in the film structure.</p> |
