Manufacturing method for transparent fiber

Patent metadata

Field	Value
Publication number	US-2016145774-A1
Application number	US-201514738958-A
Country	US
Kind code	A1
Filing date	Jun 15, 2015
Priority date	Nov 26, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

A manufacturing method for a transparent fiber is provided. The method includes forming a spinning solution containing a polyimide polymer in an organic solvent. The polydispersity index (PDI) of the polyimide polymer is 1.3˜2.6. The spinning solution is used to perform a dry-jet wet spinning step to form a plurality of fibers. Furthermore, the plurality of fibers are subjected to a thermal drawing step to form a plurality of transparent fibers, wherein the temperature of the thermal drawing step is controlled from 215° C. to 350° C. The manufacturing method for a transparent fiber provided in the present invention makes use of a polyimide polymer material and utilizes a dry-jet wet spinning step and a thermal drawing step, which allows the formation of a transparent and high strength polyimide fiber.

First claim

What is claimed is:

1 . A manufacturing method for a transparent fiber, comprising:
providing a spinning solution, the spinning solution comprises a polyimide polymer and an organic solvent, wherein the polyimide fiber has a polydispersity index (PDI) of 1.3˜2.6; performing a dry-jet wet spinning step on the spinning solution to form a plurality of fibers; performing a thermal drawing step on the plurality of fibers to form a plurality of transparent fibers, wherein the temperature of the thermal drawing step is from 215° C. to 350° C.

2 . The manufacturing method for a transparent fiber according to claim 1 , wherein the polyimide polymer in the spinning solution has a molecular weight range from 32,000 g/mol to 55,000 g/mol.

3 . The manufacturing method for a transparent fiber according to claim 1 , wherein the polyimide polymer in the spinning solution has a weight percentage from 8 wt % to 40 wt %.

4 . The manufacturing method for a transparent fiber according to claim 1 , wherein the thermal drawing step has a thermal drawing ratio from 1 to 5.

5 . The manufacturing method for a transparent fiber according to claim 1 , further comprising performing a hot roller expansion process before performing the thermal drawing step.

6 . The manufacturing method for a transparent fiber according to claim 5 , wherein the hot roller expansion process has an expansion ratio from 1 to 5.

7 . The manufacturing method for a transparent fiber according to claim 5 , wherein the dry-jet wet spinning step comprises:
loading the spinning solution into a spinning apparatus; and ejecting the spinning solution from the spinning apparatus, wherein the spinning solution comes into contact with air and enters a coagulation bath to form a plurality of transparent fibers.

8 . The manufacturing method for a transparent fiber according to claim 1 , wherein the preparation steps for the spinning solution comprises:
mixing a diamine monomer and an dianhydride monomer with an organic solvent and then performing a polycondensation reaction to form a polyamic acid polymer; and performing a cyclization reaction of the polyamic acid to form the polyimide polymer.

9 . The manufacturing method for a transparent fiber according to claim 8 , wherein the diamine monomer is selected from one of formula (1) to formula (4):

10 . The manufacturing method for a transparent fiber according to claim 8 , wherein the dianhydride monomer is selected from one of formula (5) to formula (7):

Assignees

• Taiwan Textile Res Inst

Inventors

• Chou Shang-Chih
• Chen Chun-Hung
• Lin Chun-Hung

Classifications

• D01D10/02

  Heat treatment (heating for finishing D02J13/00) · CPC title

• D02J1/228

  Stretching in two or more steps, with or without intermediate steps · CPC title

• C08G73/1003

  Preparatory processes · CPC title

• D01F6/74 Primary

  from polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles · CPC title

• D01D5/16

  using rollers, or like mechanical devices, e.g. snubbing pins · CPC title