公开(公告)号：US20240375336A1

公开(公告)日：2024-11-14

申请号：US18580699

申请日：2022-07-20

Applicant: NITTO DENKO CORPORATION

Inventor： Tatsuya Araki ,  Kenichiro Nishiwaki ,  Sho Irie ,  Yasuharu Imamura

IPC: B29C48/21 ,  B29C48/05 ,  B29C48/285 ,  B29L11/00

Abstract: A method is disclosed for manufacturing a plastic optical fiber composed of a plurality of layers including a core and a cladding, which includes forming at least one layer formed of the plurality of layers by melt extrusion molding of a material resin using a melt extrusion unit including an extrusion screw, wherein a pellet of the material resin is fed to the melt extrusion unit, and a relation expressed by the following inequality (I) is satisfied by a flight height Hf (mm) of the extrusion screw in a feed zone Lf of the melt extrusion unit and a maximum dimension Lmax (mm) of the pellet to be fed: 0≤Hf−Lmax≤3 (I); and a volume V (mm3) of the pellet satisfies the following inequality (II): 4