Title:
LIQUID CRYSTAL POLYESTER FIBERS AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
WIPO Patent Application WO/2010/103986
Kind Code:
A1
Abstract:
Provided are liquid crystal polyester fibers, which have a peak half-width of 15°C or greater at an endothermic peak (Tm1) observed by differential calorimetry under a temperature elevation rate of from 50 to 20°C/minute, a weight-average molecular weight in terms of polystyrene of between 250,000 and 2,000,000, and a variable waveform of less than 10% in terms of the half inert diagram mass waveform by a Worcester yarn irregularity tester. Also provided is a method for producing liquid crystal polyester fibers, wherein liquid crystal polyester fibers are formed into a package, the fibers are then subjected to solid-phase polymerization, and the solid-phase polymerized liquid crystal polyester fibers are unraveled from the package and directly heat treated without being taken up. The heat treatment temperature is a temperature that is at least 60°C greater than the endothermic peak temperature (Tm1) of the solid-phase polymerized liquid crystal polyester fibers, and the speed of the fibers before and after heat treatment is governed by first and second rollers.
Inventors:
FUNATSU YOSHITSUGU (JP)
MAEDA YUHEI (JP)
SUZUKI NORIO (JP)
KATSUTA HIROO (JP)
MAEDA YUHEI (JP)
SUZUKI NORIO (JP)
KATSUTA HIROO (JP)
Application Number:
PCT/JP2010/053506
Publication Date:
September 16, 2010
Filing Date:
March 04, 2010
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
FUNATSU YOSHITSUGU (JP)
MAEDA YUHEI (JP)
SUZUKI NORIO (JP)
KATSUTA HIROO (JP)
FUNATSU YOSHITSUGU (JP)
MAEDA YUHEI (JP)
SUZUKI NORIO (JP)
KATSUTA HIROO (JP)
International Classes:
D02J13/00; D01F6/62; D06M15/643
Domestic Patent References:
WO2008105439A1 | 2008-09-04 |
Foreign References:
JP2008240228A | 2008-10-09 | |||
JP2008240230A | 2008-10-09 | |||
JPH02200813A | 1990-08-09 | |||
JPH05331708A | 1993-12-14 | |||
JPH03260114A | 1991-11-20 | |||
JP2008240228A | 2008-10-09 | |||
JP2008240230A | 2008-10-09 |
Other References:
"Reforming technology and the latest applications of liquid crystal polymer", 2006, TECHNICAL INFORMATION INSTITUTE, CO., LTD, pages: 235 - 256
See also references of EP 2407583A4
See also references of EP 2407583A4
Attorney, Agent or Firm:
BAN Toshimitsu (JP)
Toshimitsu Ban (JP)
Toshimitsu Ban (JP)
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