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Surface treatment method of tantalum sprayer for wet spinning

A technology of wet spinning and surface treatment, applied in the field of surface treatment of tantalum spinnerets, can solve the problem that the spinnability is not as good as that of precious metal spinnerets, and achieve the effects of excellent spinnability, lower production costs, and improved chemical fiber quality

Inactive Publication Date: 2002-11-20
BEIJING HUAYU CHUANGXIN SCI & TRADE CO LTD +1
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Problems solved by technology

[0020] However, the above-mentioned surface treatment of tantalum spinneret with simple nitriding method, although the surface hardness can meet the requirements, its spinnability is not as good as that of noble metal spinneret for the reasons mentioned above. In wet spinning, especially In the production of viscose fiber, it cannot be used to replace the precious metal spinneret

Method used

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  • Surface treatment method of tantalum sprayer for wet spinning
  • Surface treatment method of tantalum sprayer for wet spinning
  • Surface treatment method of tantalum sprayer for wet spinning

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no. 2 example

[0074] Step 1, process metal tantalum plate into tantalum spinneret with prior art, such as figure 1 As shown, the tantalum spinneret includes a body 10, the outer diameter of the spinneret outlet surface 11 is 12mm, the number of micropores 12 is 30, and the inner diameter of the micropores is 0.083±0.001mm.

[0075] Step 2, nitriding: use the LD-25 ion nitriding furnace produced in Beijing, use the tantalum spinneret produced in step 1 as the cathode, the furnace temperature is 1000°C, the furnace pressure is 1000Pa, and the gas filled is nitrogen and hydrogen. Nitrogen: hydrogen = 1:3, nitriding for two hours, vacuum cooling to 100°C and taking out, after nitriding, the hardness of the tantalum spinneret is about HV900. Such as image 3 As shown, a nitrided layer 20 is formed on the surface of the tantalum spinneret.

[0076] Step 3. Coating: apply 10 volts of anode voltage to the molten lithium nitrate solution at 500°C, and react at constant voltage for 6 hours to prepa...

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Abstract

The surface treatment method of tantalum spinneret for wet spinning includes the following steps: a. making metal tantalum plate into tantalum spinneret; b. using ion nitridizing furnace to form nitridation layer on the surface of tantalum spinneret; c. adopting fused-salt electrochemical method to make tantalum spinneret undego the process of film-coating treatment to form a layer of film layer containing lithium tantalate on tantalum spinneret; and d. polishing the surface of nozzle to remove insulated film layer containing tithium tantalate and remain transition layer of tantalum.

Description

[0001] [Technical field] The present invention relates to a surface treatment method for a tantalum spinneret used in wet spinning. 【Background technique】 [0002] Chemical fiber production has developed vigorously at the end of the 20th century and has become an important part of the national economy. The spinneret (plate) is the most precise and important part in chemical fiber production. Its quality directly affects Labor productivity, cost and fiber quality of chemical fiber production. People have been continuously improving the spinneret to meet the development needs of chemical fiber production. [0003] The production process of chemical fiber is different, and the requirements for spinnerets (plates) are also different. In chemical fiber production, three processes are usually used, namely, melting method, dry method (also known as dry and wet method) and wet method. Among them, the pressure that the melting spinneret can withstand is up to several hundred atmosphe...

Claims

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Application Information

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IPC IPC(8): C23C8/36C25D9/06C25D11/26D01D4/02
Inventor 刘寓中
Owner BEIJING HUAYU CHUANGXIN SCI & TRADE CO LTD
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