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Novel fiber-drawing hot bath medium and application thereof

A heat bath and medium technology, applied in the direction of stretch spinning, etc., can solve the problems of uneven heating of fibers, complex device structure, unfavorable drafting, etc. Effect

Inactive Publication Date: 2014-04-16
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, since hot roller drafting needs to be carried out on one or more groups of several hot rollers, there is a certain distance between the rollers, and the tow needs to pass through a section of air between the previous hot roller and the next hot roller. Due to the temperature difference between the air atmosphere and the hot roller, the temperature of the fiber will decrease, which is not conducive to the drawing, and also affects the formation and control of the supramolecular structure in the fiber
[0005] In the hot box drawing process, hot air is usually used as the heating medium. Due to the poor heat conduction of the air, it will also cause uneven heating of the fibers on the surface and inside of the tow, which will eventually affect the uniformity of the fiber structure and properties.
[0006] In recent years, the pressurized steam drawing method has been applied to the drawing of special fibers, but the equipment required for pressurized steam drawing has complex structure, high investment and poor operability

Method used

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Examples

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Effect test

Embodiment 1

[0031] Embodiment 1: the stretching of polyethylene terephthalate (PET) fiber in silicone oil hot bath medium

[0032]Silicone oil is used as the hot bath medium, and the hot bath temperature is 180°C. PET pre-oriented yarn (POY) is drawn in the hot bath medium. The residence time of the fiber in the hot bath medium is 3 seconds, and the maximum draw ratio can be up to 9 times. The measured fiber tensile strength is 70-80cN / dtex, and the elongation at break is 6-15%. Under the same residence time conditions in the same hot bath medium, the relationship between the maximum draw ratio and the hot bath temperature is as follows: figure 2 shown.

Embodiment 2

[0033] Embodiment 2: the stretching of polyethylene terephthalate (PET) fiber in the glycerin hot bath medium

[0034] Glycerin is used as the heat bath medium, and the temperature of the heat bath is 170°C. The PET pre-oriented yarn (POY) is drawn in the heat bath medium. The residence time of the fiber in the heat bath medium is 3 seconds, and the maximum draw ratio can be up to 8 times. The measured fiber tensile strength is 60-75cN / dtex, and the elongation at break is 10-20%. Under the same residence time conditions in the same hot bath medium, the relationship between the maximum draw ratio and the hot bath temperature is as follows: figure 2 shown.

Embodiment 3

[0035] Embodiment 3: the drawing-off of polyethylene terephthalate (PET) fiber in glycerin hot bath medium

[0036] Use PEG600 as the heat bath medium, the temperature of the heat bath is 60°C, draw the PET pre-oriented yarn (POY) in the heat bath medium, the residence time of the fiber in the heat bath medium is 3 seconds, and the maximum draw ratio can be up to 10.5 times. The measured fiber tensile strength is 60-90cN / dtex, and the elongation at break is about 5-12%. Under the same residence time conditions in the same hot bath medium, the relationship between the maximum draw ratio and the hot bath temperature is as follows: figure 2 shown.

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Abstract

A novel fiber-drawing hot bath medium is composed of one or multiple of the following components: high-boiling-point polyol, polyoxyethylene oligomer, polyoxypropylene oligomer, mineral oil and silicon oil. By using the medium, fibers can be uniformly and quickly drawn in a high-multiple manner, and producing of fiber products uniform in structure and performance is facilitated.

Description

technical field [0001] The invention relates to a novel fiber drafting hot bath medium, and relates to a method for using the hot bath medium to quickly and uniformly draw fibers at a high speed. The invention further relates to the application of the hot bath drafting medium. Background technique [0002] In the fiber processing process, drawing is an indispensable process. Drawing can make the polymer in the chemical fiber produce mechanical, optical, thermal anisotropy, and is an important means to improve the strength of the chemical fiber. In the chemical fiber forming process, it is hoped to form as many extended chain structures as possible to obtain high-strength, high-modulus fiber materials, so the drafting process plays a decisive role in the preparation of high-performance fiber materials. [0003] Forming forms of fibers include wet spinning, dry-wet spinning and melt spinning. For melt spinning, the drafting process mainly adopts hot roll drafting, hot plate ...

Claims

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Application Information

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IPC IPC(8): D01D5/14B29C55/04
Inventor 刘瑞刚徐坚刘晓芳朱才镇康宏亮黄勇
Owner INST OF CHEM CHINESE ACAD OF SCI
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