发明名称 |
Polyester fiber dyeable under normal pressure and process for the production thereof |
摘要 |
A polyethylene terephthalate fiber capable of being dyed under normal pressure and having an initial modulus of more than 50 g/d, a peak temperature (T max) at peak of dynamic mechanical loss tangent (tan delta ) measured with a frequency of 110 Hz of about 85 DEG C. to about 110 DEG C., and a peak value of the dynamic mechanical loss tangent ((tan delta ) max) of about 0.115 to about 0.135. The fiber has a sheath-core structure such that refractive indices are different between an outer layer of the fiber and an inner layer of the fiber, and a local average refractive index distributed symmetrically around the center of the cross section of the fiber. The fiber is made by extruding a dope of polyester, passing the extruded filaments through a heating zone provided at the surface of the extrusion nozzle and having a length of at least about 5 cm and a temperature of about 150 DEG C. to about the melting point of the polymer, applying a vacuum with an aspirator located below the heating zone, and then winding at a winding speed of at least about 5,000 m/min.
|
申请公布号 |
US4415726(A) |
申请公布日期 |
1983.11.15 |
申请号 |
US19820340895 |
申请日期 |
1982.01.19 |
申请人 |
ASAHI KASEI KOGYO KABUSHIKI KAISHA |
发明人 |
TANJI, HIROSHI;IWATA, MICHITAKA;SATO, HIDEO |
分类号 |
D01D5/084;D01D5/098;D01F6/62;(IPC1-7):C08G63/02;C08G63/70 |
主分类号 |
D01D5/084 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|