Manufacture of high tenacity low-stretch polyester filaments

A high-strength, low-stretch, polyester filament technology, applied in the field of polyester production technology, can solve the problems of product quality and actual production capacity limitation, unstable production operation, strong process dependence, etc., and achieve high added value of products and elongation at break. The effect of low rate and wide source of raw materials

Inactive Publication Date: 2003-10-15
SINOPEC YIZHENG CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Increasing the draw ratio is beneficial to increase the fiber strength, decrease the elongation and reduce the shrinkage in boiling water, but if the draw ratio is too high, wool and broken ends will easily occur, and the fiber quality will deteriorate
Therefore, the process dependence of this method is very strong, the production operation is unstable, and the quality of the product and the actual production capacity are greatly limited.

Method used

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  • Manufacture of high tenacity low-stretch polyester filaments
  • Manufacture of high tenacity low-stretch polyester filaments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The conventional POY yarn of 250dtex / 48f is drawn through the first hot plate at 70°C and the second hot plate at 150°C. The draw ratio DR1 is 1.85. The hot plate is 130°C for secondary drafting, the draw ratio DR2 is 1.2, and then enters the second hot box to be relaxed and shaped at 220°C, and then winds through the cold plate. There is no broken end or hairy yarn during the production process, and the winding is formed Good, the physical indexes of the obtained silk are shown in Table 1.

Embodiment 2

[0019] The conventional POY yarn of 165dtex / 36f, the elongation at break is 130%, and the strength at break is 2.1cN / dtex, and it is drawn through the first hot plate at 60°C and the second hot plate at 130°C, and the draw ratio DR1 is 1.70, enter the first hot box and undergo tension setting at 200°C, then pass through the third hot plate for secondary drawing at 125°C, the stretch ratio DR2 is 1.15, then enter the second hot box, relax and set at 200°C, and then pass through the cold plate for coiling In the production process, there is no broken end and no hairy yarn, and the winding is well formed. The physical indicators of the obtained yarn are shown in Table 1.

Embodiment 3

[0021] The POY yarn with a specification of 277dtex / 47f, a breaking elongation of 131%, and a breaking strength of 2.3cN / dtex is firstly drawn by the first hot plate at 90°C and the second hot plate at 170°C, and the stretching ratio is DR1 It is 2.0; then it enters the first hot box and undergoes tension setting at 230°C, and carries out secondary drafting through the third hot plate at 150°C, and the stretch ratio DR2 is 1.1; finally enters the second hot box, relaxes and sets at 240°C, and passes through the cold plate again Carry out coiling, there is no broken end, no wool yarn in the production process, and the coiling formation is good, and the physical index of gained silk is shown in Table 1.

[0022]

sample

Fineness

(dtex)

Breaking strength

(cN / dtex)

elongation at break

(%)

Boiling water shrinkage

(100°C,

30min)

Dry heat shrinkage

(150°C,

...

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Abstract

The present invention relates to Dacron producing process, and is especially preparation process of high-strength and low-elongation Dacron filament for sewing thread. The preparation process with routine pre-oriented POY filament includes successive first high-power drafting in the first and the second heating discs, high temperature tensed heat setting in the first heating box and the third heating box, the second drafting and the high temperature relax heat setting in the second heating box. In the process, POY filament has good drafting performance, no teasing and breaking, and the final product has high strength, low elongation and less heat shrinkage.

Description

technical field [0001] The invention belongs to polyester production technology, in particular to a preparation method of high-strength and low-stretch polyester filaments for sewing threads. Background technique [0002] Polyester filament sewing thread is widely used in many fields such as medium and high-end clothing, leather products, medical surgery, military supplies, etc. due to its high strength, good wear resistance, corrosion resistance and mildew resistance, and no joints. The preparation of polyester filament sewing thread generally adopts high-strength and low-elongation polyester filament, which requires properties such as high strength, low elongation and low heat shrinkage. [0003] At present, the following two technical approaches are used to trial-produce high-strength and low-elongation polyester filaments at home and abroad: [0004] (1) Follow the production route of polyester industrial yarn. There are three main production methods of industrial yarn...

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 Applications(China)
IPC IPC(8): D01D5/08D01F6/62D02G3/46
Inventor 李刚魏敏史利梅田学网
Owner SINOPEC YIZHENG CHEM FIBER
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