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Flat polyester fiber FDY (Fully Drawn Yarn) and preparation method thereof

A polyester fiber, flat technology, applied in the field of flat polyester fiber FDY yarn and its preparation, can solve the problems of poor product shape retention, weakening extrusion expansion ratio, reducing pressure after filtration, etc. Good shape retention effect, weakening extrusion expansion ratio, reducing the effect of outlet expansion

Active Publication Date: 2017-06-13
JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented technology describes methods for producing high quality shaping stable polyesters from spunmolten polymer solutions containing unsatured aliphatic acids or esters thereof. These techniques help prevent unwanted materials such as oligomers from entering into the resulting yarn made therefrom while maintaining its desired physical characteristics like strength, elongatability, etc., ultimately leading to improved durable products.

Problems solved by technology

Technological Problem: Current methods for making flannel threads involve adding extra materials like iron oxide powder, plumish flakes, polytetrafluoric acids, lubricants, dyes, solvents, waterproofings, antiofftons, resistant fuzzles, and softening agents into specific shapes called shaping fibers, which help prevent damage from friction and wear while maintaining their original design appeal. Additionally, current techniques require expensive equipment and complicated processes involving multiple steps, leading to lower efficiency and cost savings compared to traditional ways.

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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  • Flat polyester fiber FDY (Fully Drawn Yarn) and preparation method thereof
  • Flat polyester fiber FDY (Fully Drawn Yarn) and preparation method thereof
  • Flat polyester fiber FDY (Fully Drawn Yarn) and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of flat polyester fiber FDY filaments, the spinning melt is metered, extruded, cooled, oiled, stretched, heat-set and wound to obtain polyester fiber FDY filaments;

[0048] First prepare the spinning melt, make the monomer of terephthalic acid and ethylene glycol into slurry, wherein the molar ratio of terephthalic acid and ethylene glycol is 1:1.2, then add catalyst, stabilizer and saturated fatty acid After the metal salt is mixed evenly, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is normal pressure, and the temperature of the esterification reaction is 250°C. When the value is above 90%, it is the end point of the esterification reaction; then after the end of the esterification reaction, the polycondensation reaction in the low vacuum stage starts under the condition of negative pressure. At 260°C, the reaction time is 30 minutes; then continue to vac...

Embodiment 2

[0067] A preparation method of flat polyester fiber FDY filaments, the spinning melt is metered, extruded, cooled, oiled, stretched, heat-set and wound to obtain polyester fiber FDY filaments;

[0068] First prepare the spinning melt, make the monomer of terephthalic acid and ethylene glycol into slurry, wherein the molar ratio of terephthalic acid and ethylene glycol is 1:2.0, then add catalyst, stabilizer and saturated fatty acid After the metal salt is mixed evenly, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.3MPa, and the temperature of the esterification reaction is 260°C. When the value is above 90%, it is the end point of the esterification reaction; then after the end of the esterification reaction, the polycondensation reaction in the low vacuum stage starts under the condition of negative pressure. At 270°C, the reaction time is 50 minutes; then continue to vacuumize, c...

Embodiment 3

[0089] A preparation method of flat polyester fiber FDY filaments, the spinning melt is metered, extruded, cooled, oiled, stretched, heat-set and wound to obtain polyester fiber FDY filaments;

[0090] First prepare the spinning melt, make the monomer of terephthalic acid and ethylene glycol into slurry, wherein the molar ratio of terephthalic acid and ethylene glycol is 1:1.6, then add catalyst, stabilizer and saturated fatty acid After the metal salt is mixed evenly, the esterification reaction is carried out. The esterification reaction is pressurized in a nitrogen atmosphere. The pressurized pressure is 0.2MPa, and the temperature of the esterification reaction is 255°C. When the value is above 90%, it is the end point of the esterification reaction; then after the end of the esterification reaction, the polycondensation reaction in the low vacuum stage starts under the condition of negative pressure. At 265°C, the reaction time is 40 minutes; then continue to vacuumize, c...

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Abstract

The invention relates to a flat polyester fiber FDY (Fully Drawn Yarn) and a preparation method thereof. The spinning melt comprises a saturated fatty acid metal salt and polyester, wherein a mass ratio of the saturated fatty acid metal salt to polyester is (0.0005-0.002):1; the filtered pressure during spinning is 84-126kg/cm<2>; a die-swell ratio of the spinning melt is 1.22-1.34; and the saturated fatty acid metal salt refers to a fatty acid metal salt with the carbon atom number of 12-22, the melting point of 100-180 DEG C and the dynamic viscosity of less than or equal to 1Pa.s. The saturated fatty acid metal salt is added into the spinning melt, and the filtered pressure and extrudate swelling during spinning can be effectively reduced, so that the product has an excellent shape preserving effect; meanwhile, the saturated fatty acid metal salt can serve as a nucleating agent, so that the fiber curing speed is increased, and the fiber shape preserving effect is improved. In addition, the fiber structure regularity is not greatly damaged by the saturated fatty acid metal salt, and excellent performances of the polyester fibers are maintained.

Description

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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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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Owner JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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