公开(公告)号：US11660796B2

公开(公告)日：2023-05-30

申请号：US16918442

申请日：2020-07-01

Applicant: NITTO DENKO CORPORATION

Inventor： Yoshinori Kono ,  Akifumi Kido ,  Makoto Azukizawa

IPC: B29C48/08 ,  B29C48/305 ,  B29C44/20 ,  B29K105/24 ,  B29K23/00 ,  B29K105/04

CPC classification number: B29C48/305 ,  B29C44/20 ,  B29C48/08 ,  B29K2023/16 ,  B29K2105/04 ,  B29K2105/24

Abstract: There is provided a die for extrusion in which an undesired reaction is suppressed in an inside thereof and with which variation in thickness of a resin sheet to be obtained can be reduced. A die for extrusion of the present invention includes: a cylindrical inflow port into which a molten resin flows; a manifold connected to the inflow port; a first slit connected to the manifold; a second slit connected to the first slit; and a lip land connected to the second slit. In the die for extrusion, the shape of a flow path is optimized based on a relationship among a position in the die, an operation time, and a vulcanization degree.

公开(公告)号：US20210039296A1

公开(公告)日：2021-02-11

申请号：US16918442

申请日：2020-07-01

Applicant: NITTO DENKO CORPORATION

Inventor： Yoshinori Kono ,  Akifumi Kido ,  Makoto Azukizawa

IPC: B29C48/305 ,  B29C48/08 ,  B29C44/20

Abstract: There is provided a die for extrusion in which an undesired reaction is suppressed in an inside thereof and with which variation in thickness of a resin sheet to be obtained can be reduced. A die for extrusion of the present invention includes: a cylindrical inflow port into which a molten resin flows; a manifold connected to the inflow port; a first slit connected to the manifold; a second slit connected to the first slit; and a lip land connected to the second slit. In the die for extrusion, the shape of a flow path is optimized based on a relationship among a position in the die, an operation time, and a vulcanization degree.

公开(公告)号：US20230137024A1

公开(公告)日：2023-05-04

申请号：US17915680

申请日：2020-11-06

Applicant: NITTO DENKO CORPORATION

Inventor： Hajime Michihira ,  Akifumi Kido ,  Takashi Kumano ,  Yuto Nagaya

IPC: B29C48/37 ,  C08G64/02 ,  B29C48/05

Abstract: The present invention provides an apparatus for manufacturing a plastic optical fiber suitable for adjusting a plastic optical fiber to be uniform in size while inhibiting the entry of a metal that causes an increase in transmission loss of the plastic optical fiber. The apparatus for manufacturing a plastic optical fiber of the present invention is provided with an extruding device and a gear pump. The extruding device has a containing portion that contains a resin composition, and introduces a gas into the containing portion to extrude the resin composition from the containing portion by means of the gas. The gear pump adjusts a flow rate of the resin composition extruded from the extruding device.