Method for preparing sewing-thread polyester filaments with high strength and low dry-heat shrinkage

A dry heat shrinkage, polyester filament technology, applied in the field of polyester filament, can solve the problems that the strength cannot meet the needs of users, easy to produce filaments and broken ends, unstable fiber quality, etc., and achieve stable production and operation. Simple, high product added value, low boiling water shrinkage effect

Inactive Publication Date: 2009-09-02
QINGDAO WEIFENG FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-strength polyester filament prepared by this method is also prone to wool and broken ends, and the strength cannot meet the user's demand for strength, and the fiber quality is not very stable. Relatively speaking, the production speed is low and unstable. The cost is too high, and the actual production capacity of the product is greatly limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Processing 140dtex / 48f high strength and low dry heat shrinkage polyester filament

[0018] Ordinary slices are solid-phase thickened and then dried and dehumidified to enter the screw extruder for high-temperature melting, pass through the first hot roll at 85°C, the second hot roll at 110°C, and the stretching ratio of 5.0, and then enter the third hot roll at 230°C and the fourth hot roll The hot roll is 200°C, the draw ratio is 1.0, and it is wound into a silk cake. During the production process, there is no broken end and no fuzz and the winding is good. The obtained product indicators are shown in Table 1.

Embodiment 2

[0020] Processing 45dtex / 24f high strength and low dry heat shrinkage polyester filament

[0021] Ordinary slices are solid-phase thickened and then dried and dehumidified to enter the screw extruder for high-temperature melting. The first hot roll is 80°C, the second hot roll is 115°C, and the stretching ratio is 4.8. Then it enters the third hot roll at 220°C and the fourth The hot roll is at 210°C, the draw ratio is 1.0, and it is wound into a silk cake. During the production process, there is no breakage and no fuzz, and the winding is good. The obtained product indicators are shown in Table 1.

Embodiment 3

[0023] Processing 233dtex / 72f high strength and low dry heat shrinkage polyester filament

[0024] Ordinary slices are solid-phase thickened and then dried and dehumidified to enter the screw extruder for high-temperature melting, pass through the first hot roll at 95°C, the second hot roll at 120°C, and the stretching ratio of 5.2, and then enter the third hot roll at 230°C and the fourth hot roll The hot roll is at 220°C, the draw ratio is 1.2, and it is wound into a silk cake. During the production process, there is no broken end and no fuzz, and the winding is good. The obtained product indicators are shown in Table 1.

[0025] Table 1:

[0026] Sample

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Abstract

The invention discloses a method for preparing sewing-thread polyester filaments with high strength and low dry-heat shrinkage. The method is characterized in that common slices are tackified through solid-phase polymerization; the tackified common slices are dried to remove moisture and then enter a screw extruder so as to be melted; the obtained material is spun, cooled and oiled; and the obtained material is stretched through four times of hot rolling and then wound into a spinning cake. The polyester filaments with high strength and low dry-heat shrinkage, which are processed by the method, have the advantages of high strength, low dry-heat shrinkage, low boiling-water shrinkage, low elongation, few broken filaments, few broken ends and other good qualities, along with steady simple production operation and low production cost.

Description

technical field [0001] The invention belongs to polyester filaments, in particular to a preparation method of fine-denier polyester filaments. Background technique [0002] High strength and low dry heat shrinkage polyester filament for sewing thread has the characteristics of high strength, small dry heat shrinkage, low elongation, ironing resistance, no deformation, and good wear resistance. When making, there is no stagnation of needles, no clustering of threads, and it is very smooth. Widely used in high-end bags, clothing, leather products, decorations, etc. Sewing threads are generally made of high-strength and low-dry-heat-shrinkage polyester filaments, which require high-strength and low-dry-heat shrinkage properties. The high-strength and low-shrinkage polyester filament has a strength of at least 6.8 CN / dtex and a dry heat shrinkage of less than 5% (at a constant temperature of 180°C for 30 minutes). At present, the following two technical approaches are used to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01D5/08D01D1/00D01D5/092D01D5/098D01F6/62
Inventor 何世元迟来光王武强纪翠英
Owner QINGDAO WEIFENG FIBER
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