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A kind of high flexibility environment-friendly staple fiber and preparation method thereof

A technology of short fiber and flexibility, which is applied in the field of polyester fiber and its preparation, can solve the problems that have not been developed accordingly, and achieve the effect of soft and plump hand feeling, avoiding slippage, and improving adhesion

Active Publication Date: 2019-03-19
SINOPEC YIZHENG CHEM FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, how to apply the polyester obtained by polymerization of titanium-based catalysts in the field of spinning fibers, and the method steps and process parameters in the spinning process and the properties of fibers obtained have not been correspondingly developed. There are related studies

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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  • A kind of high flexibility environment-friendly staple fiber and preparation method thereof
  • A kind of high flexibility environment-friendly staple fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Example 1: The polyester melt synthesized with a titanium-based catalyst passes through the polyester and spinning handover point, enters the melt pipeline of the spinning device at a pressure of 6 MPa, and the melt enters the spinning box after being pressurized and filtered at 15 MPa Spinning at 8 MPa, spinning temperature 284°C, spinning speed 1122m / min, ring blowing cooling wind speed 1.0m / s, to obtain primary fibers; primary drafting of primary fibers at 60°C, drafting ratio 3.32 times, 170°C Secondary drafting, the drafting ratio is 1.25 times, 160°C tense heat setting for 30s, then crimping, cutting, and packaging to obtain 1.6dtex environmentally friendly polyester staple fibers.

Embodiment 2

[0016] Example 2: The polyester melt synthesized with a titanium-based catalyst passes through the polyester and spinning handover point, enters the melt pipeline of the spinning device at a pressure of 5 MPa, and the melt enters the spinning box after being pressurized and filtered at 18 MPa Spinning at 6MPa, spinning temperature 290°C, spinning speed 1400m / min, ring blowing wind speed 0.8m / s, to obtain primary fibers; primary drafting of primary fibers at 50°C, drafting ratio 3.00 times, 120°C Secondary drafting, the drafting ratio is 1.56 times, 170°C tense heat setting for 20s, then crimping, cutting, and packaging to obtain 0.8dtex environmentally friendly polyester staple fibers.

Embodiment 3

[0020] Example 3: The polyester melt synthesized with a titanium-based catalyst passes through the polyester and spinning handover point, enters the melt pipeline of the spinning device at a pressure of 3 MPa, and the melt enters the spinning box after being pressurized and filtered at 20 MPa 3MPa spinning, spinning temperature 280°C, spinning speed 1020m / min, ring blowing cooling wind speed 1.2m / s, to obtain primary fibers; primary drafting of primary fibers at 70°C, drafting ratio 3.96 times, 190°C Secondary drafting, the drafting ratio is 1.98 times, 180°C tense heat setting for 15s, then crimping, cutting, and packaging to obtain 2.8dtex environmentally friendly polyester staple fibers.

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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PUM

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Abstract

The invention discloses high-flexibility environmentally-friendly short fiber and a preparation method thereof, and the short fiber with the fiber modulus of 35-48CN / dtex and the fineness of 0.8dtex-8.0dtex is obtained by direct spinning of polyester synthesized by a titanium-containing catalyst. Compared with a conventional process, the polyester short fiber is produced by the titanium-containing catalyst, while maintaining of constant original indexes of the product, spinning temperature is reduced, improvement of adhesion between a polyester melt and a spinneret plate capillary pore tube wall is facilitated, melt slippage on the wall can be avoided, unstable melt flow is induced, melt fracture is caused, and spinning hard wires and pulp bolts are generated. At the same time, aiming at a titanium melt, the spinning speed and the draw ratio are optimized to reduce the fiber modulus, production is normal, finished fiber is soft and plump in hand feeling, and fiber flexibility is further improved.

Description

technical field [0001] The invention relates to the technical field of synthetic fiber production, in particular to a polyester fiber and a preparation method thereof. Background technique [0002] With the continuous improvement of people's living standards and concerns about the environment, environmentally friendly short fibers are becoming more and more popular. In the traditional fiber production process, it is necessary to add a catalyst containing heavy metal antimony when producing polyester, and the use of this catalyst is easy to cause pollution to the environment. At present, relevant patents have disclosed the method of producing polyester with titanium-based catalysts, for example: the Chinese patent "Catalyst for the production of polyester" with the authorized announcement number CN100567364C, the Chinese patent "used for the production of polyester" with the authorized announcement number CN100586982C Titanium Catalyst for Esters", the Chinese patent "Titani...

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): D01F6/62D01F6/84D01D5/08D01D5/092D01D5/12D01D10/02
Inventor 陈培李青王群陈小红王玉合
Owner SINOPEC YIZHENG CHEM FIBER
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