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High-quality and high-efficiency production method of in-situ polymerization flame-retardant chinlon 66 fully-drawn yarn

A technology of in-situ polymerization and fully drawn filaments, which is applied in the manufacture of fire-resistant and flame-retardant filaments, the melting of filament raw materials, and single-component polyamide artificial filaments. It can solve the problems of poor durability of flame-retardant properties and mechanical properties of materials. impact, fabric comfort and other issues, to achieve long-lasting flame retardant effect, less impact on mechanical properties, and improve the effect of purity

Active Publication Date: 2021-07-09
THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the development of flame-retardant nylon mainly includes post-finishing method and flame retardant blend spinning method. Silk method is likely to cause adverse effects such as poor spinnability, low quality and performance, and instability due to the large amount of flame retardant additives and poor dispersibility.
For example, Chinese patent application CN103387666A uses melamine and cyanuric acid as raw materials to prepare polyamide nanocomposites. Because of the large amount of flame retardant added, the mechanical properties of the material are greatly affected after the addition; Flame-retardant nylon 66 fiber with good performance and mechanical properties has become a technical problem to be solved urgently

Method used

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  • High-quality and high-efficiency production method of in-situ polymerization flame-retardant chinlon 66 fully-drawn yarn
  • High-quality and high-efficiency production method of in-situ polymerization flame-retardant chinlon 66 fully-drawn yarn
  • High-quality and high-efficiency production method of in-situ polymerization flame-retardant chinlon 66 fully-drawn yarn

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1, preparation of in-situ polymerization flame-retardant nylon 66 fully drawn yarn

[0048] The preparation process is as figure 1 shown.

[0049] 1) The in-situ polymerized flame-retardant nylon 66 slices with a phosphorus content of 3500ppm were dried and viscosified by using a solid-phase viscosifying device. The specific reaction conditions were: the drying temperature was 150°C, the vacuum degree in the device was 50KPa, and the time was After 36 hours, the water content of the slices was 400ppm after drying, and the relative viscosity of the slices was 2.6. An independent monomer extraction system is installed in the solid-phase viscosity extraction device to remove the small molecular monomers produced by the reaction, and a palladium-based catalyst device is introduced to continuously release the catalyst Pd(OAc) 2 , to further speed up the removal rate of small molecular monomers, thereby improving the slice purity and preparation efficiency.

[0050...

Embodiment 2

[0061] Example 2, preparation of in-situ polymerization flame-retardant nylon 66 fully drawn yarn

[0062] According to the steps in Example 1, the specific conditions are shown in Table 1.

[0063] Among them, the phosphorus content of the in-situ polymerization flame-retardant nylon 66 chips is 5500ppm.

[0064] The indicators of the flame-retardant nylon 66 fully drawn yarn prepared in this example are shown in Table 1.

Embodiment 3

[0065] Example 3, preparation of in-situ polymerization flame-retardant nylon 66 fully drawn yarn

[0066] According to the steps in Example 1, the specific conditions are shown in Table 1.

[0067] Among them, the phosphorus content of the in-situ polymerization flame-retardant nylon 66 chips is 4500ppm.

[0068] The indicators of the flame-retardant nylon 66 fully drawn yarn prepared in this example are shown in Table 1.

[0069] The index of the flame-retardant nylon 66 full-drawn silk prepared by the embodiment 1-3 of table 1

[0070]

[0071]

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Abstract

The invention discloses a high-quality and high-efficiency production method of an in-situ polymerization flame-retardant chinlon 66 fully-drawn yarn. The method comprises the following steps: in-situ polymerization is conducted on a reaction type organic phosphorus flame retardant, adipic acid and hexamethylenediamine to obtain flame-retardant chinlon 66 slices; a solid-phase viscosity improving device is adopted for drying and viscosity improving of the flame-retardant chinlon 66 slices; the treated flame-retardant chinlon 66 slices are melted through a screw extruder to obtain a melt; the melt is uniformly distributed into spinning components in spinning box bodies through a melt distribution pipe, is sheared by the metal sand in a sand cup, and then flows to a spinneret plate from the porous sand cup to be sprayed out to form a primary tow; cooling is conducted by cross air blowing, and oiling is conducted; drafting and shaping are conducted by multiple sections of drafting rollers; and a spinning cake is formed by winding. The flame-retardant chinlon 66 fiber prepared by the method has the advantages of small flame retardant addition amount, flame retardance and mechanical property, stable product quality, high preparation efficiency and easiness in industrial production, and can meet the use requirements of special clothing fields such as industrial use, military industry and the like.

Description

technical field [0001] The invention relates to a high-quality and high-efficiency production method of in-situ polymerization flame-retardant nylon 66 full-drawn yarn, which belongs to the field of synthetic fiber processing. Background technique [0002] With the improvement of people's living conditions, clothing has developed from the initial function of covering the body and keeping out the cold to the pursuit of individualization and functionality, and the performance is not limited to a single function but tends to be multi-functional and high-performance. , The direction of compound development. The safety of clothing fabrics is closely related to its flame retardancy, especially in special environments where its flame retardancy is very important. [0003] Nylon, also known as nylon, is the earliest high-performance fiber to realize industrial production. Its wear resistance ranks first among synthetic fibers. The most widely used are nylon 6 and nylon 66. It is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D02J1/08D01D5/098D01D1/04D01F6/90D01F1/07
CPCD02J1/08D01D5/098D01D1/04D01F6/90D01F1/07
Inventor 冯新星张华沈卫峰马训明
Owner THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
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