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Imidization device and method for preparing polyimide fiber filaments

A polyimide fiber, imidization technology, applied in the field of polyimide preparation, can solve the problems of poor imidization quality uniformity, large fluctuation of unwinding tension, and high technical requirements for polyimide fiber production, and achieves the Good bonding force and permeability, good unwinding and use performance, good mutual fusion performance

Active Publication Date: 2019-03-08
YIWU HUADING NYLON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, polyimide fiber production requires high technical requirements, great difficulty, and high production cost. In particular, the imidization treatment mainly involves the dehydration and closed-loop of macromolecular polymers under high temperature conditions, which needs to be carried out under high temperature conditions. According to the existing technology The number of filament coils processed in each batch is small, generally 1-4 spindles, the speed is about 100-500m / min, the production volume per unit time is small, the cost is high, and most of them are processed by hot rollers, the power consumption cost is high, and the product is substandard. Amination quality uniformity is poor
And after treatment, the inner and outer contact parts of the fiber filament rolls are easy to bond, and the unwinding tension fluctuates greatly during the post-stretching process and use, which is easy to break, the production efficiency is low, and it is difficult to use.

Method used

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  • Imidization device and method for preparing polyimide fiber filaments

Examples

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Comparison scheme
Effect test

preparation example Construction

[0080] The preparation method of described high temperature resistant oil agent, comprises the following steps:

[0081] Take each component according to the ratio, put the simethicone oil into the oil agent blending device with steam heating and chilled water cooling system, heat up and stir, the stirring speed is 25-30rpm, and the temperature reaches 95-105°C and then balance for 20-30min. Then add sorbitan monooleate polyether, dodecyl phosphate diethanolamine, fatty alcohol polyoxyethylene ether, triethanolamine, isomeric tridecyl atactic polyether, triglycerin under stirring condition Fatty acid ester, polyoxyethylene lauryl ether. Stir for 35-40min after each component is added, and the stirring speed is 40-45rpm. After adding each component, increase the stirring speed to 50-60rpm, then raise the temperature to 150-160°C, and balance for 6-12h. Bring to room temperature. Before use, the obtained oil agent is diluted to a concentration of 5-15wt%.

Embodiment 1

[0083] An imidization device for preparing polyimide fiber filaments, comprising a cylindrical, sealed cylinder and a rotating multi-layer oil pool-shaped silk coil placement rack (a disc with an open top) located in the cylinder type); the rotary multi-layer oil pool-shaped wire roll placement rack includes a rotating support shaft vertically arranged in the cylinder body and three layers of wire roll placement grooves fixed in series on the rotation support shaft; one end of the rotation support shaft runs through the cylinder The top or bottom of the body and connected with the matching motor; the inner wall of the barrel is equipped with three microwave emitters (working power range 0-6KW) and three infrared emitters (working The power range is 50-150KW). Wherein, the microwave emitters and the infrared emitters located on the same layer are evenly spaced. The distance between the inner wall of the cylinder body and the outer side of the silk roll placement groove is 1.5c...

Embodiment 2

[0107] This embodiment is the same as the device of embodiment 1.

[0108] The method for imidization of polyimide fiber filament, comprises the following steps:

[0109] 1) Place the silk roll in the silk roll placement tank, then add diluted high temperature resistant oil (5wt%) to submerge the silk roll, the oil level is 110% of the height of the silk roll;

[0110] 2) Control the vacuum degree in the cylinder at -0.10Mpa to -0.50Mpa, control the rotation speed of the silk roll placement tank to 3rpm; use microwave emitters and infrared emitters to heat for imidization treatment;

[0111] 3) The final temperature of imidization is controlled at 270°C, and the heating process is carried out according to the following steps:

[0112] At 0-100°C, the infrared power is 100KW, the microwave power is 2KW, and the balance is 30min;

[0113] At 100-150°C, the infrared power is 90KW, the microwave power is 2KW, and the balance is 60min;

[0114] At 150-200°C, the infrared power i...

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Abstract

The invention relates to the field of polyimide preparation and discloses an imidization device and method for preparing polyimide fiber filaments. The imidization device comprises a sealed barrel anda rotatable multilayer oil-tank-shaped wire coil placement rack arranged in the barrel, the rotatable multilayer oil-tank-shaped wire coil placement rack comprises a rotatable supporting shaft vertically arranged in the barrel and multiple wire coil placement grooves sequentially serially connected and fixed on the rotatable supporting shaft, one end of the rotatable supporting shaft penetrates the top or the bottom of the barrel and is connected with a matched motor, and a plurality of microwave emitters and infrared emitters are arranged at positions, corresponding to each wire coil placement groove, on the inner wall of the barrel. By the device, the number of fiber imidization in unit time can be increased substantially, production efficiency is improved, and energy consumption and production cost are lowered substantially; treated fiber filaments are free of bonding, small in unwinding tension fluctuation during processing and using after stretching, less prone to end breaking and good in using performance.

Description

technical field [0001] The invention relates to the field of polyimide preparation, in particular to an imidization device and an imidization method for preparing polyimide fiber filaments. Background technique [0002] Polyamideimide fiber is a fiber material with many functions such as high temperature resistance, acid corrosion resistance, antibacterial, insulation shielding, flame retardant, self-extinguishing, wave permeability, radiation protection, etc. It belongs to high-performance fiber materials and is suitable for many It is widely used in military industry, aerospace and harsh environmental conditions such as high temperature and low temperature, and it is also an ideal material for making military uniform fabrics such as firefighting uniforms and navy uniforms with heat insulation, light weight and softness. [0003] However, polyimide fiber production requires high technical requirements, great difficulty, and high production costs. In particular, the imidizat...

Claims

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Application Information

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IPC IPC(8): D01F11/08D06M15/643D06M15/53D06M13/368D06M101/30
CPCD01F11/08D06M13/368D06M15/53D06M15/643D06M2101/30
Inventor 戎智宗张守运李世鹏熊先政
Owner YIWU HUADING NYLON