Hydrophilic copolyester chip and preparation method thereof

A copolyester, hydrophilic technology, applied in the field of polyester modification, can solve the problem of no obvious improvement in fiber moisture regain, and achieve the effects of good hydrophilic performance, easy industrial production and low production cost

Inactive Publication Date: 2012-07-11
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the dyeability and softness of the modified polyester fiber are improved, the moisture regain of the fiber is not significantly improved

Method used

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  • Hydrophilic copolyester chip and preparation method thereof
  • Hydrophilic copolyester chip and preparation method thereof
  • Hydrophilic copolyester chip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Using batch polymerization equipment, add 10kg (60.24mol) PTA, 4.11kg (66.29mol) EG, 0.0916kg (1.204mol) 1,2-PDO, 0.3219kg (0.904mol) SIPE, 1kg (0.167mol) ) PEG6000, 0.05kg (0.626mol) TiO 2 , 0.003kg (0.01mol) of antimony acetate and 0.002kg (0.0061mol) of triphenyl phosphate were reacted for 3 hours at a reaction temperature of 245°C for esterification. The temperature of the reaction kettle 1 was set at 270° C., the vacuum degree was set at 15 Pa, the reaction was carried out for 3 hours, and the polycondensation reaction was carried out. After the reaction was completed, the material was discharged and pelletized to obtain copolyester chips. The chip had an intrinsic viscosity of 0.621 dL / g and a melting point of 244.2°C. After the prepared hydrophilic copolyester chips are pre-crystallized, dried and spun, a hydrophilic copolyester fiber is obtained, and the moisture regain of the fiber is 1.01%.

[0083]

Embodiment 2

[0085] Using batch polymerization equipment, add 10kg (60.24mol) PTA, 4.11kg (66.29mol) EG, 0.3664kg (4.816mol) 1,2-PDO, 1.2876kg (3.614mol) SIPE, 0.1kg (0.0167 mol) PEG6000, 0.2kg (2.504mol) TiO 2 , 0.003kg (0.01mol) of antimony acetate and 0.002kg (0.0061mol) of triphenyl phosphate were reacted for 3 hours at a reaction temperature of 245°C for esterification. The temperature of the reaction kettle 1 was set at 270° C., the vacuum degree was set at 15 Pa, the reaction was carried out for 3 hours, and the polycondensation reaction was carried out. After the reaction was completed, the material was discharged and pelletized to obtain copolyester chips. The chip had an intrinsic viscosity of 0.611 dL / g and a melting point of 241.1°C. After the prepared hydrophilic copolyester chips are pre-crystallized, dried and spun, a hydrophilic copolyester fiber is obtained, and the moisture regain of the fiber is 1.03%.

[0086]

Embodiment 3

[0088] Using batch polymerization equipment, add 10kg (60.24mol) PTA, 4.11kg (66.29mol) EG, 22.9kg (0.301mol) 1,2-PDO, 0.3219kg (0.904mol) SIPE, 3kg (0.501mol) ) PEG6000, 0.05kg (0.626mol) TiO 2 , 0.003kg (0.01mol) of antimony acetate and 0.002kg (0.0061mol) of triphenyl phosphate were reacted for 3 hours at a reaction temperature of 245°C for esterification. The temperature of the reaction kettle 1 was set at 270° C., the vacuum degree was set at 15 Pa, the reaction was carried out for 3 hours, and the polycondensation reaction was carried out. After the reaction was completed, the material was discharged and pelletized to obtain copolyester chips. The chip had an intrinsic viscosity of 0.56 dL / g and a melting point of 228.2°C. After the prepared hydrophilic copolyester chips are pre-crystallized, dried and spun, a hydrophilic copolyester fiber is obtained, and the moisture regain of the fiber is 1.80%.

[0089]

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Abstract

The invention discloses a hydrophilic copolyester chip and a preparation method thereof. The hydrophilic copolyester chip is characterized by mainly comprising pure terephthalic acid (PTA), ethylene glycol (EG), meta-phenyl diacid diol ester-5-sodium sulfonate, polydiol, other diols, a delustering agent and the like. The preparation method comprises the following steps of: adding the raw materials into a reaction kettle in a ratio, and performing esterification reaction to obtain ester; heating the ester, and performing polycondensation reaction; and discharging after the reaction is finished, pelletizing, and drying. Batch polymerization equipment or semi-continuous polymerization equipment is adopted. By adding a hydroxyl-containing component and inorganic powder into a copolyester chip, the molecular structure of polyester is changed, and the hydrophilic copolyester chip has high hydrophilicity; the preparation method is simple; the preparation process does not have any special requirement on the polymerization equipment; and the hydrophilic copolyester chip can be produced on the conventional domestic or imported equipment, so production cost is low, and industrial production is easy to implement.

Description

technical field [0001] The invention relates to a hydrophilic copolyester chip and a preparation method thereof, belonging to the field of polyester modification. Background technique [0002] The molecular structure of PET fiber has a high degree of stereoregularity, the molecular chains are tightly arranged, the structure is symmetrical, and the molecular chain contains rigid benzene rings. This makes PET have good physical and mechanical properties, chemical corrosion resistance, and microbial erosion resistance. PET's high crystallinity and high orientation during fiber formation make its fibers and fabrics have good shape retention, crispness, easy washing and quick drying, and are therefore popular among consumers. However, its own nature also brings disadvantages such as poor hydrophilicity of PET fibers, yarns and fabrics, and easy generation of static electricity, which hinders its further application and development. Therefore, when PET came out, people began to s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/688C08G63/672C08G63/78C08K13/02C08K3/22C08K5/523C08K5/521D01F6/92D01F1/10
Inventor 俞建勇赵明良王学利李发学刘渊
Owner DONGHUA UNIV
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