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Preparation method of dyeable polyester composite fiber of cationic dye

A technology of cationic dyes and composite fibers, which is applied in the field of preparation of cationic dye-dyeable polyester composite fibers, which can solve the problems of low curl, poor bulkiness, and prone to color difference in cross-section

Inactive Publication Date: 2009-12-30
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the core layer is conventional polyester or polyamide, when it is made into short fibers, especially when it is used in faux fur and other napped fabrics, the cross-section is prone to color difference, and the faux fur made of two-dimensional curl has a low degree of curl , Fluffiness is poor, and the simulation effect is not good

Method used

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  • Preparation method of dyeable polyester composite fiber of cationic dye

Examples

Experimental program
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Embodiment 1

[0039] Preparation of modified polyester raw materials: on the semi-continuous polyester equipment, add purified terephthalic acid and ethylene glycol monomers into the slurry tank at a molar ratio of 1:1.20 for beating, and add catalyst ethylene glycol into the beating tank Alcohol antimony; the above slurry is continuously and stably transported to the esterification-I reactor, the pressure of the esterification-I reactor is controlled at 0.12MPa, the temperature is 250-258.0°C, the esterification rate is 98.2%, and the esterification product is sent to the esterification Chemical-II reactor.

[0040]Among them, the core layer component is to add 2.5mol% SIPE in the esterification-II reactor, control the temperature of the esterification-II reactor at 245-255°C, and the residence time of 30-50 minutes, and pump the homogeneously mixed esterified product to polycondensation In the section, according to the conventional polycondensation process, polycondensation is carried out...

Embodiment 2

[0045] The process steps of this example are basically the same as those of Example 1, the difference being that: the purified terephthalic acid and ethylene glycol monomers are added into the slurry tank at a molar ratio of 1:1.18 for beating. The skin component is produced by adding 2.0mol% SIPE and 6.0% PEG with a molecular weight of 1500 to the esterification-II reactor, and the prepared cationic dyeable polyester chip has an intrinsic viscosity of 0.600dL / g. The rest of the steps are the same.

[0046] The physical index of the fiber of this embodiment: fineness 3.2dtex, strength 3.31CN / dtex, elongation 32.5%, the strength when fiber elongation 10% is 1.67CN / dtex, crimp number 19 / 25mm, dye uptake rate 97.5% .

Embodiment 3

[0048] The process steps of this example are basically the same as those of Example 1, except that the purified terephthalic acid and ethylene glycol monomers are added into the slurry tank at a molar ratio of 1:1.25 for beating. The skin component is produced by adding 5.0mol% SIPE and 3.0% PEG with a molecular weight of 1500 in the esterification-II reactor, and the prepared cationic dyeable polyester chips have an intrinsic viscosity of 0.585dL / g. The rest of the steps are the same.

[0049] The physical index of the fiber of this embodiment: fineness 3.2dtex, intensity 3.38CN / dtex, elongation 33.4%, the strength when fiber elongation 10% reaches 1.72CN / dtex, crimp number 16 / 25mm, dye uptake rate 96.5% .

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Abstract

The invention discloses a preparation method of dyeable polyester composite fiber of cationic dye. The preparation method comprises the following steps of: (1) preparation of modified polyester materials: including the preparation of core layer components and skin layer components; (2) preparation of polyester composite fiber: using the above method to prepare two types of dyeable modified polyester chips of cationic dyes, respectively carrying out crystallizing, drying, screw melting and extruding, metering, entering a skin-core eccentric composite spinning component according to the weight composite ratio of the skin layer and the core layer, completely wrapping the core layer by the skin layer, and preparing the three-dimensional curly dyeable polyester composite fiber of cationic dye by the follow-up technique. The invention has higher fiber initial modulus, can overcome the defects of lower fiber initial modulus of normal-pressure single component of the cationic dye, and form spiral three-dimensional curl after drawing and heat-setting, the curl number is higher than that of the fiber obtained by two-dimensional mechanical curl obviously; the cationic dye can carry out normal-pressure dyeing; and when being made into short fiber, the fiber section of the dyeable polyester composite fiber has no colour difference and is characterized by bright color and various styles.

Description

technical field [0001] The invention relates to a preparation method of a cationic dye-dyeable polyester composite fiber, which belongs to the technical field of chemical fibers. Background technique [0002] As we all know, polyester (polyester) fiber has become the fastest growing and most widely used variety in chemical fibers due to its excellent comprehensive performance and cost advantages. However, due to the molecular structure characteristics of polyester, its dyeing performance is poor. Generally, polyester fibers can only be dyed with disperse dyes under high temperature and high pressure or in the presence of carriers. In order to improve the dyeing performance, cationic dyeable polyester and fiber have been developed successively, becoming the largest modified product of polyester. [0003] Adding modified polyester obtained by copolymerization of ethylene glycol isophthalate-5-sulfonate (SIPE) can realize the dyeability of cationic dyes, but it still needs to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01D5/34
Inventor 王秀华姚玉元孟继承
Owner ZHEJIANG SCI-TECH UNIV
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