CELLULOSE ACETATE AND PROCESS FOR PRODUCING THE SAME

摘要

The present invention provides a cellulose acetate satisfying at least one requirement selected from the following requirements (A) , (B) and (C), provided that the case where (B) alone is satisfied is excluded. Requirement (A) : Bright spotty matters in sizes of 20 mu m or more are not more than 20 units/mm<3>. Requirement (B) : Blocking constant (K) is not more than 60. Requirement (C): The ratio (G'/G") of storage modulus (G') to loss modulus (G") at a measuring frequency of 0.016Hz is not more than 0.2.