公开(公告)号：US20210079561A1

公开(公告)日：2021-03-18

申请号：US16959649

申请日：2019-07-10

Applicant: DAICEL CORPORATION

Inventor： Takehiro MATSUMOTO ,  Hiroaki TAMAGAKI ,  Keita TAKAHASHI ,  Takahiko SHIMA

IPC: D01F2/28 ,  A24D3/10 ,  D01F1/10

Abstract: An object is to mitigate clogging of spinneret holes which occurs as the passage of spinning time even though cellulose acetate has a small titanium oxide content or contains no titanium oxide and to prevent a reduction in pressure drop of a cellulose acetate band. A cellulose acetate fiber, in which a titanium oxide content is not greater than 0.05 wt. %, a calcium content is not greater than 20 ppm, and a magnesium content is not less than 30 ppm.