| 摘要 |
PROBLEM TO BE SOLVED: To provide a biaxially drawn film with surface which is ultra-smooth, and has no agglomerate, at a favorable productivity. SOLUTION: For this biaxially drawn film wherein a surface roughening material is added to a thermoplastic resin, a central line average surface roughness Ra (mμm) of the film, and the added average particle diameter d (mμm) satisfy a relationship of Ra<=d/12. As the means, a film containing a fine particle is driven by a linear motor system, and a simultaneous biaxial drawing is performed. |
