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A kind of regenerated polyester filament and preparation method thereof

A technology of recycled polyester and filament, which is applied in the fiber field, can solve the problem that the recycled polyester fiber does not have a three-dimensional crimp shape, and achieve the effect of excellent comprehensive performance

Active Publication Date: 2021-07-20
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses a regenerated polyester filament and a preparation method thereof, aiming to solve the problem that the regenerated polyester fiber does not have a three-dimensional crimp shape in the prior art

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing regenerated polyester filaments, in the process of preparing fibers from regenerated polyester with an intrinsic viscosity of 0.6dL / g according to the FDY process, using ring blowing to cool, and controlling the arrangement of spinneret holes on the spinneret The fabric meets certain conditions, and after the FDY yarn is prepared, it is subjected to relaxation heat treatment to obtain recycled polyester filament;

[0033] The spinneret hole is a C-shaped spinneret hole and a circular spinneret hole. The cross-section of the C-shaped spinneret hole is surrounded by an outer arc M, an inner arc N and two line segments. The two ends of M are A and B respectively. The length of line segment AB is 0.11mm;

[0034] Certain conditions are: all spinneret holes are distributed in concentric circles, the ratio of the number of C-shaped spinneret holes to circular spinneret holes is 70:30, and the C-shaped spinneret holes are located on the outermost circle ...

Embodiment 2

[0039]A method for preparing regenerated polyester filaments, in the process of preparing fibers from regenerated polyester with an intrinsic viscosity of 0.6dL / g according to the FDY process, using ring blowing to cool, and controlling the arrangement of spinneret holes on the spinneret The fabric meets certain conditions, and after the FDY yarn is prepared, it is subjected to relaxation heat treatment to obtain recycled polyester filament;

[0040] The spinneret hole is a C-shaped spinneret hole and a circular spinneret hole. The cross-section of the C-shaped spinneret hole is surrounded by an outer arc M, an inner arc N and two line segments. The two ends of M are A and B respectively. The length of line segment AB is 0.11mm;

[0041] Certain conditions are: all the spinneret holes are distributed in concentric circles, the ratio of the number of C-shaped spinneret holes to circular spinneret holes is 80:20, and the C-shaped spinneret holes are located on the outermost circ...

Embodiment 3

[0046] A preparation method of regenerated polyester filaments, in the process of preparing fibers from regenerated polyester with an intrinsic viscosity of 0.69dL / g according to the FDY process, using ring blowing to cool, and controlling the arrangement of spinneret holes on the spinneret The fabric meets certain conditions, and after the FDY yarn is prepared, it is subjected to relaxation heat treatment to obtain recycled polyester filament;

[0047] The spinneret hole is a C-shaped spinneret hole and a circular spinneret hole. The cross-section of the C-shaped spinneret hole is surrounded by an outer arc M, an inner arc N and two line segments. The two ends of M are A and B respectively. The length of line segment AB is 0.11mm;

[0048] Certain conditions are: all the spinneret holes are distributed in concentric circles, the ratio of the number of C-shaped spinneret holes to circular spinneret holes is 80:20, and the C-shaped spinneret holes are located on the outermost c...

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Abstract

The invention relates to a regenerated polyester filament and a preparation method thereof. In the process of preparing fibers from regenerated polyester according to the FDY process, ring blowing is used for cooling, and the arrangement of the spinneret holes on the spinneret is controlled to meet certain conditions. , after making FDY silk, carry out relaxation heat treatment to obtain regenerated polyester filament; the spinneret hole is a C-shaped spinneret hole and a circular spinneret hole, and the cross-section of the C-shaped spinneret hole is composed of an outer arc M and an inner arc Enclosed by N and two line segments, the two ends of M are A and B respectively; certain conditions are: all the spinneret holes are distributed in concentric circles, and the C-shaped spinneret holes are located on the outermost circle and rotate at different angles. Random distribution; the obtained regenerated polyester filament has a three-dimensional crimped shape, and the crimp direction of the monofilament is randomly distributed. The invention adopts a simple method to prepare the regenerated polyester filament with three-dimensional crimped shape, and solves the problem that the knitted fabric made from the three-dimensional crimped fiber is prone to "uneven stripes".

Description

technical field [0001] The invention belongs to the field of fiber technology, and relates to a regenerated polyester filament and a preparation method thereof. Background technique [0002] Polyethylene Terephthalate (PET, polyester for short) is a widely used synthetic polymer material. In 2015, the global PET output exceeded 40 million tons, second only to polyolefin, and is the most important synthetic fiber. And the leading material used in the field of food packaging (accounting for more than 80%). However, as a non-degradable petroleum-based synthetic polymer material, the social reserves of polyester waste products are also very large, especially waste polyester textiles with complex types of impurities and high content are increasing at a rate of one million tons every year, but currently The recycling rate is less than 3%, and the resulting waste of petrochemical resources and solid waste pollution are becoming increasingly serious. Therefore, the high-efficiency...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01D5/22D01D5/253D01D10/02D01F6/62
CPCD01D5/22D01D5/253D01D10/02D01F6/62D01D5/082D01D5/16D01D4/025D01D5/08D01D5/088D02J13/00D10B2331/04
Inventor 范红卫王山水王丽丽汤方明
Owner JIANGSU HENGLI CHEM FIBER