发明名称 |
Liquid crystal polyester fibers and method for producing the same |
摘要 |
Disclosed 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 of 20° C./minute from 50° C., polystyrene equivalent weight average molecular weight of 250,000 or more and 2,000,000 or less, and a variable waveform of less than 10% in terms of the half inert diagram mass waveform determined by a Uster yarn irregularity tester. Also disclosed 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 unrolled from the package and successively heat treated without being once taken up. The heat treatment temperature is controlled at a temperature of the endothermic peak temperature (Tm1) of the solid-phase polymerized liquid crystal polyester fibers+60° C. or higher, and the speeds of the fibers before and after heat treatment are regulated, respectively, by first and second rollers. |
申请公布号 |
US9011743(B2) |
申请公布日期 |
2015.04.21 |
申请号 |
US201013255524 |
申请日期 |
2010.03.04 |
申请人 |
Toray Industries, Inc. |
发明人 |
Funatsu Yoshitsugu;Maeda Yuhei;Suzuki Norio;Katsuta Hiroo |
分类号 |
D03D15/00;D06M15/643;C09K19/38;D01D10/02;D01F6/62;D01F6/84;D02J13/00 |
主分类号 |
D03D15/00 |
代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
主权项 |
1. A method for producing liquid crystal polyester fibers which comprises:
forming liquid crystal polyester fibers into a package, subjecting said fibers to solid-phase polymerization, unrolling from said package solid-phase polymerized liquid crystal polyester fibers, and without further taking up into a package, successively heat treating said solid-phase polymerized liquid crystal polyester fibers, wherein the temperature of said heat treatment is controlled at a temperature of an endothermic peak temperature (Tm1) of said solid-phase polymerized liquid crystal polyester fibers+60° C. or higher, and a speed of said fibers before and after heat treatment is regulated, respectively, by a first roller and a second roller. |
地址 |
Tokyo JP |