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Flame retardant PTT polyester fiber and production method thereof

A polyester fiber and production method technology, which is applied in the field of organic synthesis, can solve the problems that it is difficult to meet the requirements of high-grade flame-retardant polyester fabrics, other properties of polyester fibers have not been eliminated, and the breaking strength of polyester fibers has decreased, so as to reduce the impact on the human body. Scald, good fiber-forming properties and thermal stability and thermo-oxygen stability, the effect of reducing flame delay

Active Publication Date: 2009-09-16
JIANGSU ZHONGLU TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) Copolymerization method: the flame retardant is introduced into the polyester macromolecular chain as a copolymerization modification component, which is in a random copolymerization state, and the flame retardant polyester fiber and fabric are obtained by copolymerization. The flame retardant obtained by this method The flame retardancy of polyester is longer, but the effect is not good, and other properties of polyester fibers such as breaking strength are reduced due to the introduction of flame retardant components
[0011] The above three methods have a good effect on the modification of PET polyester fiber, but when applied to PTT polyester fiber, it will cause adverse effects on its original excellent performance.
However, if we simply focus on the modification of conventional PET polyester fibers, it is difficult to meet the requirements of high-grade flame-retardant polyester fabrics. The development of the market urgently requires the development of high-grade flame-retardant products with distinctive characteristics.
[0012] Publication No. CN101130601A, titled "Flame Retardant Trimethylene Terephthalate and Production Method" discloses a PTT polyester with good flame retardancy and high breaking strength, which contains 0.3% to 1% of Specific phosphorus-based flame retardant components, however, are severely degraded during the synthetic process of the polyester, and the actual strength of the obtained fibers still cannot meet the needs of practical applications, making it difficult to carry out the subsequent textile and fabric production processes. In addition, flame retardant The influence of the addition of additives on other properties of polyester fibers has not been eliminated, such as the degradation rate of polyester fibers is fast, and the phenomenon of melting and dripping is serious when burning.

Method used

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  • Flame retardant PTT polyester fiber and production method thereof
  • Flame retardant PTT polyester fiber and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A flame-retardant PTT polyester, prepared by the following method:

[0047] First, take 18kg of purified terephthalic acid (PTA) and 8.4kg of 1.3-propylene glycol (PDO) into a 70L polyester reactor with a molar ratio of 1:1.25, add 0.2g of zinc acetate and stir evenly, then start to heat up and pressurize to 0.15 ~ 0.30Mpa, carry out esterification reaction, the esterification temperature is controlled at 220 ~ 260 ° C, until the esterification water is completed, return to normal pressure.

[0048] Secondly, add 1.5LPDO to the above-mentioned reaction kettle to lower the temperature, so that the temperature in the kettle is reduced to 220°C, and 1250g (2-carboxyethylphenylphosphinic acid and PDO mixed slurry) prepared in advance (2-carboxyethylbenzene Base phosphinic acid 850g) adds, implements normal pressure esterification then, finishes to esterification reaction.

[0049] Preferably, the temperature of the material in the above-mentioned reactor is raised to above...

Embodiment 2

[0051] According to the production method of the PTT polyester fiber of the present embodiment, comprises the steps:

[0052] (1), prepare PTT polyester chip according to the method identical with embodiment 1;

[0053] (2) On the special spinning equipment for PTT, first pre-crystallize the specified amount of polyester chips, the pre-crystallization temperature is controlled at about 110°C, and the time is controlled for 2 hours. After the chips are fully pre-crystallized (to prevent adhesion during drying). Then the slices are transported to a drying tower for drying at a drying temperature of 140° C. for 4.0 hours. Test the moisture content in the slices, and after reaching the drying standard, start the spinning equipment to spin the slices. The temperature of each area of ​​the spinning screw and the temperature control of the elbow and the box are shown in Table 1. Control the side blowing temperature at 18-20°C, preferably 18°C, control the humidity at 65-70%, and adj...

Embodiment 3

[0055] According to the production method of the PTT polyester fiber of the present embodiment, comprises the steps:

[0056] (1), prepare PTT polyester chip according to the method identical with embodiment 1;

[0057] (2) On the PTT special spinning equipment, pre-crystallize the specified amount of polyester chips first, the pre-crystallization temperature is controlled at about 120 ° C, and the time is controlled for 2 hours. After the chips are fully pre-crystallized (to prevent adhesion during drying) . Then the slices are transported to a drying tower for drying at a drying temperature of 130° C. for 5.0 hours. Test the moisture content in the slices, and after reaching the drying standard, start the spinning equipment to spin the slices. The temperature of each zone of the spinning screw and the temperature control of the elbow and the box are shown in Table 1 above. Control the side blowing temperature at 18°C ​​to 20°C, preferably 18°C, control the humidity at 65% ...

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Abstract

The invention relates to a flame retardant PTT polyester fiber and production method thereof, wherein the polyester comprises a phosphor based copolymerization flame retardant accounting for 1.2-8.5% of the total weight of the polyester and the phosphor based copolymerization flame retardant comprises a double-reaction functional group and the phosphor element quality content in polyester is 1400-12000ppm and the PTT polyester also comprises an inorganic nano-material accounting for 0.1%-5.0% of the total weight of the polyester and the inorganic nano-material is selected from one kind or several kinds of silicon dioxide, calcium carbonate, magnesium carbonate and barium sulphate. The production method is the improvement of the conventional method, specifically before drying polyester chip, the polyester chip is precrystallized at 110-125 DEG C for 1.5-3 hour and the drying temperature is 130-145 DEG C and the drying time is 3.5-5 hours. The polyester fiber has features of good and permanent flare retardant resistance, high breakdown strength, good fiber forming property, good thermal stability and good thermal oxidation stability performance.

Description

technical field [0001] The invention belongs to the field of organic synthesis, in particular to a flame-retardant PTT polyester fiber and a production method thereof. Background technique [0002] Flame-retardant polyester fibers and flame-retardant textiles are hot spots developed in the field of chemical fibers at home and abroad in recent years. Making materials flame retardant is one of the strategic measures to reduce the incidence of fire. Both the National Bureau of Standards (NBS) and the European Chemical Industry Association have put forward flame-retardant requirements for materials in different application fields, including polyester fibers. [0003] In the prior art, the preparation of flame-retardant polyester fibers mainly contains the following three methods: [0004] (1) Post-treatment method: The fiber or fabric is impregnated and absorbed a certain amount of flame retardant during the post-treatment process. The disadvantage of this method is that the f...

Claims

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Application Information

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IPC IPC(8): D01F1/07C08G63/183D01F6/92C08G63/692
Inventor 边树昌
Owner JIANGSU ZHONGLU TECH DEV
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