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Title:
RECYCLED POLYESTER FILAMENT AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/135085
Kind Code:
A1
Abstract:
A recycled polyester filament and a preparation method therefor. In a process of preparing a fiber from recycled polyester according to FDY processing, cyclical blowing is used for cooling, and the distribution of spinneret holes on the spinneret plate is controlled to satisfy a certain condition. After the FDY thread is produced, relaxation thermal treatment is performed to obtain a recycled polyester filament. The spinneret holes are C-shaped spinneret holes and circular spinneret holes, the cross-section of the C-shaped spinneret holes being formed from an outer arc M, an inner arc N, and two line segments, the two end points of the outer arc M respectively being A and B. All of the spinneret holes are distributed in concentric circles, and the C-shaped spinneret holes are positioned on the outermost circle, rotated at different angles and randomly distributed. The present recycled polyester filament takes a three-dimensional crimped form, and the crimping directions of monofilaments are randomly distributed. The present method uses a simple method to produce a recycled polyester filament having a crimped form, and solves the problem of "uneven strip shading" occurring easily in knit articles prepared from three-dimensional crimped fibers.

Inventors:
FAN HONGWEI (CN)
WANG SHANSHUI (CN)
WANG LILI (CN)
TANG FANGMING (CN)
Application Number:
PCT/CN2020/095729
Publication Date:
July 08, 2021
Filing Date:
June 12, 2020
Export Citation:
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Assignee:
JIANGSU HENGLI CHEMICAL FIBRE CO LTD (CN)
International Classes:
D01D5/22; D01D5/253; D01D10/02; D01F6/62
Foreign References:
CN111041571A2020-04-21
CN103409832A2013-11-27
CN108035010A2018-05-15
JPH08232137A1996-09-10
CN203890514U2014-10-22
CN102277635A2011-12-14
CN102864516A2013-01-09
CN105256398A2016-01-20
CN107130309A2017-09-05
Other References:
See also references of EP 4086375A4
Attorney, Agent or Firm:
TONGSHE INTELLECTUAL PROPERTY AGENCY (CN)
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