Title:
STRETCHED FIBERS FORMED FROM POLYPROPYLENE
Document Type and Number:
WIPO Patent Application WO/2017/209283
Kind Code:
A1
Abstract:
In order to provide stretched fibers formed from a polypropylene, which have excellent thermal creep resistance, break strength and stiffness, a production method according to the present invention is characterized by comprising a step wherein fibers for stretching, said fibers containing a homopolypropylene that satisfies the requirements (1)-(3) described below, is stretched at a stretch ratio of 7 times or more under such conditions that the stress during the stretching is from 80 MPa to 10,000 MPa (inclusive).
(1) The mmmm fraction is 97% or more.
(2) The molecular weight distribution (Mw/Mn) as obtained by GPC is less than 3.0.
(3) The melt flow rate (230°C, 2.16 kg) is 1-100 g/10 min.
Inventors:
KOIKE KATSUHIKO (JP)
OHKOSHI YUTAKA (JP)
KIM KYOUNGHOU (JP)
IKAGA TOSHIFUMI (JP)
TOYODA KAI (JP)
KUNIMITSU TATSUMA (JP)
OHKOSHI YUTAKA (JP)
KIM KYOUNGHOU (JP)
IKAGA TOSHIFUMI (JP)
TOYODA KAI (JP)
KUNIMITSU TATSUMA (JP)
Application Number:
PCT/JP2017/020628
Publication Date:
December 07, 2017
Filing Date:
June 02, 2017
Export Citation:
Assignee:
PRIME POLYMER CO LTD (JP)
UNIV SHINSHU (JP)
MITSUI CHEMICALS INC (JP)
UNIV SHINSHU (JP)
MITSUI CHEMICALS INC (JP)
International Classes:
D01F6/06; C08F10/06
Foreign References:
| JPH07258911A | 1995-10-09 | |||
| JPH10195714A | 1998-07-28 | |||
| JPH11350283A | 1999-12-21 |
Attorney, Agent or Firm:
MIYAZAKI Teruo et al. (JP)
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