醋酸丁酸纤维素 30-35%，35-39%，50-54%，44-50%，乙酰基含量13.5%, 丁酰基含量38%，乙酰基含量15.5%, 丁酰基含量35.5%，乙酰基含量3%, 丁酰基含量50%，乙酰基含量2%, 丁酰基含量52%，乙酰基含量2%, 丁酰基含量46%，乙酰基含量2%,丁酰基含量53%,粘度0.01-0.03，平均Mn～70000
