Method for preparing continuous polymerization directly-spun cation-dyeable high-shrinkage polyester staple fibers

A polyester staple fiber, cationic technology, applied in the direction of melt spinning, single-component copolyester rayon, melting of filament raw materials, etc., can solve the fluctuation of indicators such as intrinsic quality and viscosity of products that affect processing and spinning performance Larger, product performance differences and other problems, to achieve the effects of excellent spinning performance, stable product quality, and stable shrinkage

Inactive Publication Date: 2010-07-21
杭州栋华实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified copolyester chips produced on the batch polymerization device have large fluctuations in the viscosity and other indicators of the same batch of materials due to different discharge times, and between batches, due to the cracking of the residual melt on the inner wall of the reactor, etc., It is easy to cause differences in product performance between batches, and these problems will directly affect the spinning performance of post-processing and the intrinsic quality of the final product
At the same time, the modified copolyester chips need to be recrystallized, dried and melted. The process is long, the production links are many, and the production cost is high.

Method used

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  • Method for preparing continuous polymerization directly-spun cation-dyeable high-shrinkage polyester staple fibers
  • Method for preparing continuous polymerization directly-spun cation-dyeable high-shrinkage polyester staple fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0019] The preparation technology of modified copolyester melt: set the production capacity of 6000kg / hr on the continuous polyester equipment, PTA, IPA and EG monomer account for total dibasic acid (PTA, IPA and SIPE summation) by IPA The mole percentage is 6.0, the total dibasic acid (PTA, IPA and SIPE sum) and glycol (EG) are added to the slurry tank at a molar ratio of 1:1.20, and 450PPM (the weight percentage of the total production capacity) is added to the beating tank at the same time ) polycondensation catalyst ethylene glycol antimony, the above slurry is continuously and stably transported to the esterification-I reactor, the esterification-I pressure is controlled to be 0.12MPa, the temperature is 258.0°C, and the material level is 60.0%. The esterification-I material is sent to Put in the esterification-II reactor, control esterification-II reactor temperature 255 ℃, material level 60.0%, residence time 50 minutes, continuously add simultaneously and account for th...

Embodiment 2

[0021] The method of this embodiment is basically the same as in Example 1, except that the addition of IPA is 8.0%, the temperature of the esterification-I reactor is 259.0°C, the temperature of the esterification-II reactor is 258°C, and the addition of SIPE is 3.0%, then the prepolymer is pumped to the polycondensation section, and the modified copolyester is prepared according to the conventional polycondensation process. (See Table 1 for the results)

Embodiment 3

[0023]The method of this embodiment is basically the same as in Example 1, except that the addition of IPA is 10.0%, the temperature of the esterification-I reactor is 260.0°C, the temperature of the esterification-II reactor is 260°C, and the addition of SIPE is 2.0%, then the prepolymer is pumped to the polycondensation section, and the modified copolyester is prepared according to the conventional polycondensation process. (See Table 1 for the results)

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Abstract

The invention discloses a method for preparing continuous polymerization directly-spun cation-dyeable high-shrinkage polyester staple fibers. A continuous polyester preparation process is adopted, and comprises a process for preparing continuous polymerization modified copolyester melt and a process for preparing directly-spun cation-dyeable high-shrinkage polyester staple fibers; in the process for preparing the continuous polymerization modified copolyester melt, purified terephthalic acid, isophthalic acid, glycol and sodium ethylene glycol isophthalate-5-sulfonate monomers are taken as raw materials to prepare the modified copolyester melt; and then the modified copolyester melt is metered, extruded, blown to be cooled, subjected to oil finish and strand integration, drawn, heat-shaped, coiled and cut to prepare the cation-dyeable high-shrinkage polyester staple fibers. The method has the advantages of short flow, less working procedures, reasonable process, stable melt quality, and good spinning performance; and the prepared high-shrinkage polyester staple fibers have the advantages of good shrinkage stability and even dyeing, and can be dyed by a cation dye, so the production cost is obviously reduced.

Description

technical field [0001] The invention relates to a method for manufacturing modified copolyester staple fibers, in particular to a method for continuously polymerizing melt direct spinning cationic dyeable high-shrinkage polyester staple fibers, and belongs to the field of chemical fibers. Background technique [0002] Due to the numerous excellent properties of polyester (polyester) fibers, it has developed rapidly worldwide. However, the polyester molecular chains are closely gathered, the crystallinity and orientation are high, and the polarity is small. There is no gap between the polyester long chain molecules that can properly accommodate the dye molecules, so the dye particles are not easy to enter the fiber, and its dyeing performance is poor. There are few types of dyes that can be used. Generally, polyester fibers can only be dyed with disperse dyes at high temperature. Cationic dyes can dye modified polyester fiber. Due to its good color absorption, bright color a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/688D01D1/04D01D5/08
Inventor 王秀华沈国锋张根敏孟继承
Owner 杭州栋华实业有限公司
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