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An optical fiber annealing tube and its preparation process

A preparation process and technology for annealing tubes, which are applied in the field of optical fiber production, can solve problems such as poor performance of annealing tubes and affect the production efficiency and quality of optical fiber drawing, and achieve the effects of excellent performance, uniform density, and guaranteed purity and strength

Active Publication Date: 2022-08-09
SHENZHEN MPD HITECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the optical fiber drawing process, due to the poor performance of the annealing tube, it is often necessary to replace it in a short period, which greatly affects the production efficiency and quality of optical fiber drawing

Method used

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  • An optical fiber annealing tube and its preparation process
  • An optical fiber annealing tube and its preparation process
  • An optical fiber annealing tube and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0049] The preparation steps of the coke primary powder in this preparation example are as follows: calcining 120 kg of coke at 1200° C. for 22 days, and pulverizing it after cooling to obtain a coke primary powder with a D50 of 10 μm.

preparation example 2

[0051] The preparation raw materials of the polymethacrylic acid diethanolamine salt of this preparation example include 2 kg of sodium bisulfite, 50 kg of water, 0.05 kg of potassium persulfate, 5 kg of methacrylic acid and diethanolamine.

[0052] The preparation steps of the polymethacrylic acid diethanolamine salt of this preparation example are:

[0053] S1, 2kg sodium bisulfite is added to 30kg water, stirred until completely dissolved;

[0054] S2, heating the oil bath of the solution in step S1 and keeping it at 70°C;

[0055] S3, 0.05kg potassium persulfate, 20kg water and 5kg methacrylic acid are successively added dropwise to the solution obtained by step S2, respectively, and the reaction is incubated for 3h;

[0056] S4, cooling the mixed solution obtained in step S3 to 30° C., adding diethanolamine to adjust the pH to 9 to obtain a neutralized solution;

[0057] S5, the neutralization liquid obtained in step S4 is distilled under reduced pressure to obtain poly...

Embodiment 1

[0060] The graphene microflake powder used in this example is graphene prepared by physical methods, purchased from Shenzhen Xinchanglong New Materials Research Institute Co., Ltd., D50 is 6.84 μm, from figure 1It can be seen that the number of layers of graphene microflake powder used in this example is about 10 layers; the high-temperature asphalt is granular high-temperature asphalt purchased from Zhenjiang Xinguang New Material Technology Co., Ltd., and the softening point is 120 ° C.

[0061] The shape and size of the annealed tube produced in this example are as follows: figure 2 and image 3 shown, its dimensions are in mm.

[0062] The preparation raw materials of an optical fiber annealing tube in this embodiment are 80 kg of coke primary powder prepared in Preparation Example 1, 10 kg of high-temperature pitch and 10 kg of graphene flake powder.

[0063] The preparation steps of an optical fiber annealing tube in this embodiment are:

[0064] S1. Dry mixing the c...

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Abstract

The present application relates to the technical field of optical fiber production, and specifically discloses an optical fiber annealing tube and a preparation method thereof. An optical fiber annealing tube is made of raw materials including the following parts by weight: 60-80 parts of coke primary powder, 8-12 parts of high-temperature pitch and 10-30 parts of graphene flake powder. In the present application, by adding graphene microflake powder, graphene has good high temperature stability and wear resistance, thereby preparing an annealing tube with good temperature resistance and wear resistance.

Description

technical field [0001] The present application relates to the technical field of optical fiber production, and in particular, to an optical fiber annealing tube and a preparation process thereof. Background technique [0002] In the process of optical fiber drawing, the graphite annealing tube mainly provides a stable cooling temperature for the molten optical fiber, so as to ensure the integrity of the structural molecules of the optical fiber. [0003] As a relatively precise structural component in the optical fiber drawing process, the annealing tube is mainly prepared by isostatic graphite. [0004] However, in the optical fiber drawing process, due to the poor performance of the annealing tube, it often needs to be replaced in a short period, which greatly affects the production efficiency and quality of the optical fiber drawing. SUMMARY OF THE INVENTION [0005] In order to improve the comprehensive performance of the annealing tube, the present application provid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/532C04B35/622C04B35/634C03B37/10C03C25/002
CPCC04B35/532C04B35/622C04B35/63444C03B37/10C03C25/002C04B2235/422C04B2235/602C04B2235/656C04B2235/6567Y02P40/57
Inventor 李祖君黄燕生蓝云燕吴峰丘富彬
Owner SHENZHEN MPD HITECH CO LTD
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