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A kind of ultra-fine denier polyester fiber fdy yarn and preparation method thereof

A polyester fiber, ultra-fine denier technology, applied in the field of polyester fiber, can solve the problems of poor product shape retention, weakening the extrusion expansion ratio, reducing the pressure after filtration, etc., to achieve a good shape retention effect, weaken the Extrusion expansion ratio, reducing the effect of outlet expansion

Active Publication Date: 2020-06-05
JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the extrusion expansion ratio is too large and the shape retention effect of the product is not good during the existing polyester fiber melt spinning, and to provide a superfine denier polyester fiber FDY filament and a preparation method thereof. The saturated fatty acid metal salt is added to the spinning melt, which is equivalent to adding a lubricant, which can effectively reduce the post-filtration pressure during spinning, thereby effectively reducing the outlet expansion, that is, weakening the extrusion swell ratio, so that the product has a good shape-retaining effect; at the same time, saturated fatty acid metal salts can also be used as nucleating agents to promote the crystallization of polyester fibers, increase the curing speed of fibers, and further improve the shape-retaining effect of fibers; in addition, saturated fatty acid metal salts have no effect on the regularity of polyester fibers Large damage, maintaining the excellent performance of polyester fiber, its refractive index is 1.49 less than that of polyester 1.52-1.54, and has no effect on the final transparency of the product

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A preparation method of superfine denier polyester fiber FDY yarn, the spinning melt is measured, extruded, cooled, oiled, stretched, heat-set and wound to obtain polyester fiber FDY yarn;

[0039] 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 ...

Embodiment 2

[0057] A preparation method of superfine denier polyester fiber FDY yarn, the spinning melt is measured, extruded, cooled, oiled, stretched, heat-set and wound to obtain polyester fiber FDY yarn;

[0058] 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...

Embodiment 3

[0075] A preparation method of superfine denier polyester fiber FDY yarn, the spinning melt is measured, extruded, cooled, oiled, stretched, heat-set and wound to obtain polyester fiber FDY yarn;

[0076] 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...

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Abstract

The present invention relates to an ultrafine denier polyester fiber FDY filament and a preparation method thereof, wherein a spinning melt comprises a saturated fatty acid metal salt and a polyester according to a mass ratio of the saturated fatty acid metal salt to the polyester of 0.0005-0.002:1, the post-filtration pressure during spinning is 125-155 kg / cm<2>, the extrusion expansion ratio of the spinning melt is 1.25-1.35, and the saturated fatty acid metal salt has 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 1 Pa.s. According to the present invention, the saturated fatty acid metal salt is added to the spinning melt so as to provide the effect of the addition of the lubricant, such that the post-filtration pressure during the spinning is effectively reduced so as to effectively reduce the outlet expansion, and the product has the good shape retention effect; and the saturated fatty acid metal salt can be used as the nucleating agent to increase the fiber curing speed so as to further improve the fiber shape retention effect.

Description

technical field [0001] The invention belongs to the field of polyester fibers, and in particular relates to a superfine denier polyester fiber FDY filament and a preparation method thereof. Background technique [0002] Polyethylene terephthalate fiber (PET fiber or polyester fiber) has a series of high breaking strength and elastic modulus, moderate resilience, excellent heat setting, good heat resistance and light resistance, acid resistance, alkali resistance and corrosion resistance. Excellent performance, and the fabric has the advantages of anti-wrinkle, non-ironing, good crispness, etc., and is widely used in clothing, home textiles and other fields. However, polyethylene terephthalate fibers also have disadvantages such as poor hygroscopicity, non-absorbent fabric, stuffy feeling when worn, and difficult coloring, which greatly restricts the application and development of polyethylene terephthalate fibers. People have been devoting themselves to the research and dev...

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 Patents(China)
IPC IPC(8): D01F6/92D01F1/10D01D5/08D01D5/253D01D5/12
CPCD01D5/08D01D5/12D01D5/253D01F1/10D01F6/92
Inventor 苏安苏琦孙宝维陆佳颖
Owner JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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