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Thermal expansion water-blocking filling paste for optical cables and preparation method thereof

A technology of water blocking filling and thermal expansion, which is applied in the direction of fiber mechanical structure, etc., can solve the problems of destroying the structural material of the optical cable, cannot guarantee, affect the safety of optical cable communication operation, etc., and achieve the effect of improving quality, good compression resistance, and high expansion ratio

Active Publication Date: 2012-11-21
SHANGHAI HONGHUI OPTICS COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of communication technology, the scope of use of optical cables is becoming wider and wider. In order to ensure the long-term stability of the use of optical cable transmission media, the structure and materials of optical cables are becoming more and more diverse. At present, the injection process of filling paste in the optical cable manufacturing process cannot be guaranteed. 100% filling rate, there are always residual gaps inside the optical cable. Once the outer sheath of the optical cable is damaged, external moisture, water vapor and harmful substances will take advantage of it and destroy various structural materials inside the optical cable. Over time, it will directly affect the operation of the optical cable communication Safety

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 40 grams of high-molecular polymer synthetic rubber to 891 grams of hydrogenated white oil, heat and stir for 3 to 5 hours, when the temperature rises to 200 ° C, add 5 grams of high-temperature antioxidant, fully stir for 0.5 to 1 hour, and then Cool down to 20 ℃ ~ 60 ℃, add 60 grams of fumed silica at high speed, the speed is 1000 ~ 2800 rpm, stir well for 0.5 ~ 1 hour, add 3 grams of dispersant, and then disperse at high speed, the speed is 1000 ~ 2800 rpm, to obtain a semi-fluid compound, after grinding and homogenizing, add 1 gram of heat-expandable microsphere foaming agent, fully return the material and stir for 0.5 to 1 hour, then vacuum degas, and finally obtain a milky white paste compound product.

[0027] Among the above raw materials, the high-temperature antioxidant is selected from Ciba Specialty Chemicals (China) Co., Ltd., model L101, and the dispersant is selected from polyester grade ethylene glycol produced by Zhejiang Nice Group Co., Ltd.

[00...

Embodiment 2

[0030] Add 50 grams of high-molecular polymer synthetic rubber to 886.5 grams of naphthenic rubber oil, heat and stir for 3 to 5 hours, when the temperature rises to 200 ° C, add 5 grams of high-temperature antioxidant, and fully stir for 0.5 to 1 hour, Then cool down to 20 ℃ ~ 60 ℃, add 55 grams of bentonite at high speed dispersion, the speed is 1000 ~ 2800 rpm, after stirring for 0.5 ~ 1 hour, add 2 grams of dispersant, and then disperse at high speed, the speed is 1000 ~ 2800 rpm / min, to obtain a semi-fluid compound, after grinding and homogenizing, add 1.5 grams of heat-expandable microsphere foaming agent, fully return the material and stir for 0.5 to 1 hour, then vacuum degassing, and finally obtain a milky white paste compound product .

[0031] This product: flash point > 200°C, dropping point > 200°C, penetration 365 1 / 10mm, oil separation 0%, acid value 0.25mgKOH / g, oxidation induction period (190°C) ≥ 60min, expansion temperature start temperature 130-140°C, fina...

Embodiment 3

[0033] Add 45 grams of high-molecular polymer synthetic rubber to 880 grams of paraffin-based rubber oil, heat and stir for 3 to 5 hours, when the temperature rises to 200 ° C, add 5 grams of high-temperature antioxidant, stir thoroughly for 0.5 to 1 hour, and then Cool down to 20°C-60°C, add 65 grams of fumed silica at a high speed at a speed of 1000 to 2800 rpm, stir well for 0.5 to 1 hour, add 3 grams of a dispersant, and then disperse at a high speed at a speed of 1000 to 1 2800 rpm to get a semi-fluid compound, after grinding and homogenizing, add 2 grams of heat-expandable microsphere foaming agent, fully return the material and stir for 0.5-1 hour, then vacuum degas, and finally get a milky white paste compound product.

[0034] This product: flash point > 200°C, dropping point > 200°C, penetration 355 1 / 10mm, oil separation 0%, acid value 0.26mgKOH / g, oxidation induction period (190°C) ≥ 60min, expansion temperature start temperature 130-140°C, final temperature 165-1...

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PUM

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Abstract

The invention relates to thermal expansion water-blocking filling paste for optical cables. The filling paste mainly comprises base oil, an oil separation inhibitor, an antioxidant, a thickening agent, a dispersing agent and an expandable microsphere. The invention also provides a preparation method of the filling paste. The thermal expansion water-blocking filling paste for optical cables can beused for filling the air gaps among the loose tubes of the optical cables, the air gaps in the multi-conductor wires and cable cores or the combination of the structures and gaps in any other cable and optical cable components so as to prevent water or other fluids from flowing into or moving to the optical cables and cables, and has good compression resisting, water blocking, moisture preventingand buffering effects on the optical cables, thus improving the quality of the optical cable products.

Description

technical field [0001] The invention relates to a heat-expandable water-blocking filling paste for optical cables and a preparation method thereof. Background technique [0002] With the continuous development of communication technology, the scope of use of optical cables is becoming wider and wider. In order to ensure the long-term stability of the use of optical cable transmission media, the structure and materials of optical cables are becoming more and more diverse. At present, the injection process of filling paste in the optical cable manufacturing process cannot be guaranteed. 100% filling rate, there are always residual gaps inside the optical cable. Once the outer sheath of the optical cable is damaged, external moisture, water vapor and harmful substances will take advantage of it and destroy various structural materials inside the optical cable. Over time, it will directly affect the operation of the optical cable communication Safety. In particular, optical cab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/44
Inventor 沈江波
Owner SHANGHAI HONGHUI OPTICS COMM TECH
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