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Process for manufacturing fire-retardant polyester fiber

A polyester fiber and manufacturing process technology, applied in the manufacture of fire-resistant and flame-retardant filaments, single-component polyester artificial filaments, fiber treatment, etc., can solve problems such as low efficiency, many broken ends, and slight toxicity

Active Publication Date: 2012-09-26
福建经纬新纤科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic flame-retardant polyester industry is far from forming a scale. The main reason is that the current production process of flame-retardant polyester fibers is still in the "two-step method" of intermittent or semi-continuous polymerization to produce chips, and then chip spinning to produce fibers. Efficiency, high loss, small-scale production stage, and poor spinnability of chip spinning (difficult to dry chip crystallization, fast melt CPF pressure rise, spinning drool, floating yarn, and broken ends), which seriously restricts flame retardancy Industrialization Process of Polyester Fiber
Some foreign companies still use the batch polymerization process, and their synthetic fibers have a short flame-retardant period and are slightly toxic

Method used

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  • Process for manufacturing fire-retardant polyester fiber
  • Process for manufacturing fire-retardant polyester fiber
  • Process for manufacturing fire-retardant polyester fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] see Figure 1 to Figure 5 Shown, the manufacture technique of flame-retardant polyester fiber of the present invention, comprises the steps:

[0069] Step 1. Flame retardant preparation: CEPPA-EG esterification liquid is used as the flame retardant ； The flame retardant CEPPA-EG esterification liquid is formed by the esterification reaction of non-toxic phosphorus flame retardant 2-carboxyethylphenyl hypophosphorous acid CEPPA powder and polyester raw material EG, such as figure 1 As shown, the method is as follows: adopt batch preparation operation, first add metered ethylene glycol EG in the beating tank 11, put in the weighed flame retardant CEPPA powder under stirring state, after fully stirring and mixing evenly, use The screw pump 12 is pumped into the esterification kettle 13 to carry out the esterification reaction. The ratio is to add 5000kg of CEPPA powder for every 6500L of EG. The reaction formula is:

[0070] CEPPA+EG 90kPa, 175°C, 60min CEPPA-EG es...

Embodiment 2

[0110] The following only sets forth the differences from Example 1, mainly the difference in process parameters, and all the others refer to Example 1:

[0111] Step 1, flame retardant preparation: see embodiment 1 for the main process parameters of flame retardant preparation;

[0112] Step 2. Catalyst & auxiliary agent mixed solution preparation: The main process parameters for preparing the catalyst & auxiliary agent mixed solution are:

[0113] EG(L) SbAC3 (kg) TMP (kg) 2215 (kg) SbAC3 concentration (%wt.) TMP concentration (%wt.) 2215 Concentration (%wt.) Constant temperature (°C) Constant temperature time (h) 6265 150 35 375 2. 1 0.49 5.2 165 3

[0114] ;

[0115] Step 3, slurry preparation: wherein the main process parameters of slurry allocation are shown in Example 1:

[0116] ;

[0117] Step 4, the first stage esterification reaction: wherein the main process parameters of the first esterification system:

[0118] ...

Embodiment 3

[0145] The following only sets forth the differences from Example 1, mainly the difference in process parameters, and all the others refer to Example 1:

[0146] Step 1, Flame retardant preparation: See Example 1 for the main process parameters of flame retardant preparation ；

[0147] Step 2. Catalyst & auxiliary agent mixed solution preparation: The main process parameters for preparing the catalyst & auxiliary agent mixed solution are:

[0148] EG(L) SbAC3 (kg) TMP (kg) 2215 (kg) SbAC3 concentration (%wt.) TMP concentration (%wt.) 2215 Concentration (%wt.) Constant temperature (°C) Constant temperature time (h) 6265 150 35 375 2.0 0.47 5.0 165 3

[0149] ;

[0150]Step 3, slurry preparation: wherein the main process parameters of slurry preparation are shown in Example 1;

[0151] Step 4, the first stage esterification reaction: wherein the main process parameters of the first esterification system:

[0152] temperature...

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Abstract

The invention provides a process for manufacturing fire-retardant polyester fiber. The process comprises the steps of: fire retardant preparation, catalyst and promoter preparation, size preparation, two grading esterification reactions, two pre-polycondensation reactions, pre-polymer conveying and filtering, final polycondensation reactions, final polymer conveying and filtering, spinning melt conveying and distributing, spinning and drafting. According to the invention, phosphorus-based non-toxic fire retardant 2-carboxyethyl (phenyl) phosphinic acid-ethylene glycol (CEPPA-EG) esterifying liquid is adopted to ensure that the heat resistance is better; compared with a conventional generally-adopted two-step fiber producing process of firstly producing chips through batch or semicontinuous polymerization and then carrying out chip spinning, the process adopts an one-step fiber producing process of a continuous polymerization melt direct spinning method and therefore has the advantages of high production efficiency, low consumption and loss and low production cost; the manufactured fire-retardant polyester fiber has the advantages of excellent spinnability and fiber physical property and excellent fire retardation of polymer per se; and the fabric manufactured by adopting the fire-retardant polyester fiber has the advantages of more excellent and lasting fire retardation, high limit oxygen index (LOI) which is more than 34, excellent washing durability and safety and no harm to human body.

Description

technical field [0001] The invention relates to a manufacturing process of flame-retardant polyester fiber. Background technique [0002] Because most of the textiles are flammable, they are increasingly becoming the main hidden danger of indoor fires and have become a serious social problem. [0003] Flame-retardant fibers refer to fibers that have the properties of slowing down, terminating or preventing flame burning. Flame-retardant textiles are mainly used to prevent fires and protect the human body from burns. It has broad application prospects and huge development space in the fields of clothing, home textiles, auto parts, industry and hygiene, and the future market potential is huge. [0004] With the improvement of living standards and the emphasis on safety, the flame retardant standards and regulations for textiles have been gradually established and improved, which has promoted the research, development and application of flame retardant textiles. [0005] Poly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92D01F1/07D01F1/10C08G63/692D01D5/088D01D1/06D01D5/12
Inventor 林景
Owner 福建经纬新纤科技实业有限公司
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