Title:
METHOD FOR FORMING POLYMER FIBER BY MELT SPINNING UNDER NEGATIVE PRESSURE
Document Type and Number:
WIPO Patent Application WO/2018/090369
Kind Code:
A1
Abstract:
A method for forming polymer fiber by melt spinning under a negative pressure. First, a polymer melt, after being extruded from spinneret micropores, is slowly cooled to form nascent fibers; next, the nascent fibers are sequentially cooled under negative pressure and then cooled naturally. The negative pressure cooling refers to cooling in a negative pressure environment, the negative pressure environment referring to a closed environment with a constant temperature and pressure, in which the pressure is 0.001-0.01 MPa, the temperature is 5-105 ºC, and the internal atmosphere of the closed environment having a constant temperature and pressure is an atmosphere composed of air. The present invention achieves the thorough and even cooling of the fibers, solving problems in traditional melt spinning technology, for example, that fibers are cooled unevenly by ring-blowing cooling and side-blowing cooling under fixed temperature and humidity. In addition, the crystallization properties of the fibers are adjusted by means of regulating the temperature of the closed environment having a constant temperature and pressure, substantially improving the quality of the fibers. The air resistance in the spinning process is reduced by means of regulating the pressure of the closed environment having a constant temperature and pressure, improving the melt spinning speed and the production and processing efficiency.
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Inventors:
JI PENG (CN)
WANG HUAPING (CN)
WANG ZHIYAN (CN)
WANG CHAOSHENG (CN)
LI JIANWU (CN)
JIANG ZHENLIN (CN)
CHEN XIANGLING (CN)
WANG HUAPING (CN)
WANG ZHIYAN (CN)
WANG CHAOSHENG (CN)
LI JIANWU (CN)
JIANG ZHENLIN (CN)
CHEN XIANGLING (CN)
Application Number:
PCT/CN2016/106594
Publication Date:
May 24, 2018
Filing Date:
November 21, 2016
Export Citation:
Assignee:
UNIV DONGHUA (CN)
International Classes:
D01D5/08; D01D5/088; D01D5/253; D01F6/60; D01F6/62
Foreign References:
| CN102206879A | 2011-10-05 | |||
| CN101440536A | 2009-05-27 | |||
| CN106087255A | 2016-11-09 | |||
| CN103276533A | 2013-09-04 | |||
| US6420025B1 | 2002-07-16 | |||
| GB796376A | 1958-06-11 | |||
| JPH01282343A | 1989-11-14 |
Attorney, Agent or Firm:
SHANGHAI TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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