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A kind of flat polyester fiber fdy 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 export expansion, etc., and achieves good protection. shape effect, reduce extrusion expansion ratio, reduce the effect of outlet expansion

Active Publication Date: 2020-02-11
JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 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 flat 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 little effect on the regularity of polyester fibers The destruction of the polyester fiber maintains the excellent performance of the polyester fiber. Its refractive index is 1.49, which is lower than that of polyester 1.52-1.54, and does not affect 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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  • A kind of flat polyester fiber fdy yarn and preparation method thereof
  • A kind of flat polyester fiber fdy yarn and preparation method thereof
  • A kind of flat polyester fiber fdy 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...

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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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

technical field [0001] The invention belongs to the field of polyester fibers, and in particular relates to a flat 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 development of ...

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): D01F6/92D01F1/10D01D1/04D01D5/253D01D13/00
CPCD01D1/04D01D5/253D01D13/00D01F1/10D01F6/92
Inventor 柴森光苏琦刘彪
Owner JIANGSU HENGKE ADVANCED MATERIALS CO LTD
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