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Fully drawn polyester fiber and methods for preparing the same

A polyester fiber, full-drawing technology, which is applied in the field of full-drawing polyester fiber and its preparation, can solve the problems of low boiling water shrinkage and can not be satisfied, and achieves low boiling water shrinkage, production process control, and excellent fiber performance. Effect

Inactive Publication Date: 2008-12-24
ZHEJIANG HENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conventional FDY polyester fiber has good mechanical properties, and its production methods include heat pipe method and hot roller method, but because of its boiling water shrinkage rate of 6.5-8.0%, it cannot meet the needs of the weaving field that requires high fabric dimensional stability , obtaining FDY polyester fiber with good mechanical properties and low boiling water shrinkage is a problem faced by the industry and scientific and technological workers

Method used

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  • Fully drawn polyester fiber and methods for preparing the same
  • Fully drawn polyester fiber and methods for preparing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Fully drawn polyester FDY is made of conventional polyester. The conventional polyester melt is sprayed out through the spinning assembly, and after cooling, the primary fiber is directly added to the heat pipe to complete the induced crystallization of the primary fiber, and then the orientation crystallization of the fiber is further improved by two sets of hot rollers, so that the crystallization area in the fiber macromolecular structure and When the amorphous zone is controlled, the finished fully drawn polyester FDY can be obtained. In this example, the spinning temperature is 285-300°C, the side blowing wind speed is 0.35-0.5 m / s, the heat pipe temperature is 160°C, the stretching temperature is 100-110°C, the setting temperature is 185-200°C, and the winding speed is 4500°C. m / min, the main index of fully drawn polyester FDY is shown in the attached table.

Embodiment 2

[0020] The spinning temperature is 285-300°C, the side blowing wind speed is 0.35-0.5 m / s, the heat pipe temperature is 190°C, the stretching temperature is 100-110°C, the setting temperature is 185-200°C, and the winding speed is 4500 m / s points, and the rest are the same as in Example 1 above. The main indicators of fully drawn polyester FDY are shown in the attached table.

Embodiment 3-9

[0021] Examples 3-9 are shown in the following table.

[0022]

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Abstract

The invention relates to a fully drawn polyester fiber and a preparation method thereof. The technical problem to be solved by the method is to improve the size stability of polyester FDY products and widely apply the polyester FDY products in the weaving field with high size stability requirement. The boiling water shrinkage of the fiber is between 2.0 and 5.0. The method mainly comprises the following steps: firstly, a heat pipe (2) provided with a heating medium for heating is arranged under a spinneret plate of a spinning component (1) of equipment for producing FDY through the hot-roller method; and secondly, a nascent fiber spun from the spinneret plate (1) is cooled and directly added into the heat pipe (2), passes through an oil tanker (3) and then through two or two groups of hot rollers (4) and (5), enters into a network nozzle (6), and finally is wound into an FDY wire cylinder (7).

Description

technical field [0001] The invention relates to the technical field of chemical fibers, in particular to a fully drawn (FDY) polyester fiber and a preparation method thereof. Background technique [0002] The fully drawn polyester fiber can be prepared by a two-step process of first stretching and then setting, or a one-step process of simultaneously completing stretching and setting. In the traditional sense, the fully drawn polyester fiber uses two (or groups) hot rollers to stretch and shape the tow. Due to the high winding speed, the residence time of the fiber on the hot roller is very short, resulting in the stretching The control of the crystalline region and the amorphous region in the fiber macromolecular structure during the setting process is often not ideal. Therefore, the obtained fiber is still an incompletely oriented crystalline fiber. , carpets and other fields are limited. In the present invention, by adding a heat pipe at an appropriate position below th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D10/02D01D5/096D02J1/22D02J1/08
Inventor 郭华
Owner ZHEJIANG HENGYI GRP CO LTD
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