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Cationic dyeable thermoplastic polyester elastomeric fibers, and thermoplastic polyester elastomeric fibers dyed with cationic dyes

A thermoplastic polyester and cationic dye technology, applied in the direction of one-component polyetherester rayon filament, one-component copolyester rayon filament, etc. Effect

Pending Publication Date: 2022-06-24
RI THAI INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no published literature disclosing the dyeing of TPEE fibers with cationic dyes

Method used

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  • Cationic dyeable thermoplastic polyester elastomeric fibers, and thermoplastic polyester elastomeric fibers dyed with cationic dyes
  • Cationic dyeable thermoplastic polyester elastomeric fibers, and thermoplastic polyester elastomeric fibers dyed with cationic dyes
  • Cationic dyeable thermoplastic polyester elastomeric fibers, and thermoplastic polyester elastomeric fibers dyed with cationic dyes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of cationically dyeable thermoplastic polyester elastomer (CD-TPEE).

[0025] This embodiment adopts the transesterification method. Dimethyl terephthalate (DMT), 1,4-butanediol (BDO) and ethylene isophthalate-5-sodium sulfonate (SIPM) in 1:2:0.05 molar The slurry is prepared in a proportion and fed into the esterification reaction kettle, and tetrabutyl titanate catalyst and magnesium acetate co-catalyst are added. Under a nitrogen atmosphere, the transesterification reaction is carried out in the temperature range of 190-200 DEG C for 30 to 50 minutes, and the top temperature of the fractionation column is 65-70 DEG C to obtain a prepolymer. Feed the prepolymer and polytetramethylene ether glycol (PTMEG) into a polycondensation polyester kettle, raise the temperature to 240-250°C, and gradually reduce the pressure to below 130Pa to carry out the condensation polymerization reaction. The material is discharged under vacuum to obtain CD-TPEE est...

Embodiment 2

[0026] Example 2: Preparation of thermoplastic polyester elastic fibers

[0027] The above-mentioned CD-TPEE ester pellets are dried in a dehumidifying dryer to a moisture content of less than 100 ppm, and then put into a silo, which enters the screw from the silo and melts at a temperature of 220-260 ° C, and controls the discharge amount through a metering pump. The fibers are spun out through the spinning assembly at 220-260°C, cooled and solidified in a cold water environment, and then entered into the first roller (1GR) through the silk guide, and then extended by hot water at 80-100°C, using 140-180°C After the hot air is set, it enters the coiling machine to obtain CD-TPEE fiber, and the coiling machine winding tension is controlled to 10-30 grams.

Embodiment 3

[0028] Example 3: Color fastness test

[0029] In order to verify the technical effect of the present invention, the CD-TPEE fiber prepared in Example 2 was woven into a sock bag, and after scouring and washing, 2% red cationic dye (kayacryl Red L-ED) and 2% royal blue cationic dye were added respectively. The dye (Cation Blue BR-ED) was continuously soaked for 60 minutes in a pH 4 environment and 120°C water temperature, and then the color fastness was analyzed according to the test standards set by the American Association of Textile Chemists and Dyers (AATCC). The results are shown in Table 1 below:

[0030] Table 1

[0031]

[0032]

[0033] The above table shows that the fabrics woven from the TPEE fibers dyed with cationic dyes have color fastness to water, washing and perspiration above grade 3.5 and are not prone to color migration, and the color fastness to rubbing is also high. It is at level 4.5, which shows that the TPEE fibers disclosed in this case can fi...

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Abstract

The invention relates to a cationic dyeable thermoplastic polyester elastic fiber which is suitable for being combined with cationic dyes at low temperature and normal pressure. According to the present invention, the m-benzene dibasic acid dibasic ester-5-sulfonic acid group part is introduced into the crystalline polyester hard chain segment of the thermoplastic polyester elastomer, such that the m-benzene dibasic acid dibasic ester-5-sulfonic acid group part is modified into the negatively charged sulfonic acid group so as to be suitable for forming the chemical bonding with the cationic dye, such that the color fastness is improved; the invention also relates to the thermoplastic polyester elastic fiber dyed with the cationic dye.

Description

technical field [0001] The present invention relates to thermoplastic polyester elastic fibers having high dyeability to cationic dyes at low temperature and normal pressure, and thermoplastic polyester elastic fibers dyed with cationic dyes. Background technique [0002] Polyester fiber has the advantages of high strength, high modulus and good dimensional stability, so it is widely used in various woven products. However, due to the tight molecular chain of polyester, high degree of crystal orientation, low polarity and lack of hydrophilicity, the types of dyes that can be used in dyeing are very limited, and the dyeability is poor. At present, disperse dyes are mainly used. . Generally speaking, the use of disperse dyes to dye polyester fibers must be carried out under high temperature and high pressure, thereby temporarily destroying the polyester molecular chains that are firmly combined by intramolecular forces such as hydrogen bonds and Van der Waals forces. The pol...

Claims

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Application Information

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IPC IPC(8): D01F6/84D01F6/86C08G63/688
CPCD01F6/84D01F6/86C08G63/6886
Inventor 黄正烜谢朋虎
Owner RI THAI INT
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