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Preparing method of normal-temperature normal-pressure deeply-dyeable polyester filament

A technology of polyester filament and normal pressure, applied in the field of preparation of deep dyeable polyester filament at normal temperature and pressure, can solve the problems of difficult to obtain color development, fastness, increased production cost, high equipment requirements, etc., to achieve dyeing effect Good, high production efficiency, high color fastness effect

Active Publication Date: 2018-05-08
SHAOXING GLOBAL CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, generally speaking, polyester fibers have poor dyeability due to their dense fiber structure. In the case of using cationic dyes and disperse dyes, if it is not under high temperature and pressure at 130°C or using an organic solvent as a vehicle, it is difficult to dye. Obtain good color development and fastness
[0004] High temperature and high pressure dyeing adjustment has high requirements on equipment, and consumes a lot of energy, which increases the production cost

Method used

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  • Preparing method of normal-temperature normal-pressure deeply-dyeable polyester filament
  • Preparing method of normal-temperature normal-pressure deeply-dyeable polyester filament

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of deep dyeable polyester filament at normal temperature and pressure, comprising the following steps:

[0038] (1) Drying: Dry deep-dyed polyester chips under normal temperature and pressure, the drying temperature is 100~120℃, and the drying time is 24~48 hours;

[0039] (2) Extrusion: The normal temperature and pressure deep dyeable polyester chips after normal drying are sent to the extruder to be heated and melted, compressed into a melt, and extruded by a rotating screw with a screw pressure of 150~220kg / cm 2 ;

[0040] (3) Spinning: spinning at a temperature of 250~280°C and a speed of 2500~3000m / min;

[0041] (4) Winding: Stretching, twisting and winding, it is suitable for deep dyeing of polyester fibers at room temperature and pressure;

[0042] (5) Texturing: use a texturing machine to process deep-dyeable polyester fibers at room temperature and pressure to obtain deep-dyeable polyester filaments at room temperature and pressure; the dra...

Embodiment 2

[0056] The difference from Example 1 is that the normal temperature and pressure deep dyeable polyester chip in step (1) includes the following components: polyester, the third monomer and the fourth monomer, and the polyester includes normal temperature and pressure cations Dye-dyeable polyester, the third monomer includes diethyl isophthalate sulfonate, the fourth monomer includes aliphatic dibasic acid, the weight ratio of each component is as follows: normal temperature and pressure cationic dyeable 80~95% polyester, 2~8% diethyl isophthalate sulfonate, 3~12% aliphatic dibasic acid. Put the cationic dye-dyeable polyester at normal temperature and pressure into the reaction kettle, carry out esterification at 180-270°C, control the external temperature of the fractionating column at 150-180°C, and the top temperature at 130-160°C; Diethyl isophthalate sulfonate and aliphatic dibasic acid are stirred together, and after stirring for 4-20 minutes, the temperature in the kettl...

Embodiment 3

[0058] The normal temperature and pressure deep dyeable polyester chip in step (1) includes the following components: polyester, the third monomer and the fourth monomer, the polyester includes normal temperature and pressure cationic dye-dyeable polyester, the third monomer The body includes diethylene glycol isophthalate sulfonate, and the fourth monomer includes polyether. The weight ratio of each component is as follows: polyester 80-95% dyeable with cationic dyes at normal temperature and pressure, isophthalic acid Diethylene glycol formate sulfonate 3~5%, polyether 6~10%. Put the cationic dye-dyeable polyester at normal temperature and pressure into the reaction kettle, carry out esterification at 180-270°C, control the external temperature of the fractionating column at 150-180°C, and the top temperature at 130-160°C; Diethylene glycol isophthalate sulfonate and polyether are stirred together, and after stirring for 4-20 minutes, the temperature in the kettle is lowered...

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Abstract

The invention relates to a preparing method of a polyester fiber, and discloses a preparing method of a normal-temperature normal-pressure deeply-dyeable polyester filament. The problems that due to the limitation of a preparing method, the dyeing temperature of a polyester fiber is high, the requirement of high-temperature dyeing for equipment is high, energy consumption is high, and production cost is improved are solved. According to the technical scheme, the method is characterized in that raw materials include polyester, a third monomer and a fourth monomer, the third monomer is one of sodium dimethyl isophthalate sulfonate, diethyl isophthalate sulfonate and diethylene glycol isophthalate sulfonate, and the fourth monomer is fatty binary acid or polyether. The aims of dyeing the polyester filament at normal temperature and normal pressure and being good in dyeing effect, small in energy consumption in the dyeing process and low in cost are achieved.

Description

technical field [0001] The present invention relates to a kind of preparation method of polyester fiber, more specifically, it relates to a kind of preparation method of normal temperature and pressure deep dyeable polyester filament. Background technique [0002] Polyester fiber is a common chemical fiber fabric fiber. It is a synthetic fiber obtained by spinning polyester formed by polycondensation of organic dibasic acid and dibasic alcohol. Ordinary polyester fiber has high breaking strength and elastic modulus. It has the advantages of constant elasticity and excellent heat setting performance, but due to its compact structure and lack of groups for adsorbing dyes in the molecule, it is difficult to dye, and it needs to be dyed under heat and pressure. [0003] Polyester fibers are used in various fields mainly for clothing because of their mechanical properties, color development, and handling properties. However, generally speaking, polyester fibers have poor dyeabil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/78D01F6/84D06P1/00D06P3/52D02G1/02D01D5/08
CPCC08G63/688C08G63/6886C08G63/78D01D5/08D01F6/84D02G1/0206D02G1/0286D06P1/00D06P3/52
Inventor 徐双喜陈跃平沈伟
Owner SHAOXING GLOBAL CHEM FIBER
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