Low smoke halogen-free flame retardant sheath material for optical fiber cable, and preparation method thereof

A flame-retardant sheath and optical cable technology, applied in the direction of fiber mechanical structure, etc., can solve the problems of reducing mechanical properties and extrusion performance, and achieve excellent comprehensive performance, prevent the formation of molten droplets, and good cold resistance.

Inactive Publication Date: 2012-12-05
JIANGSU NANFANG COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After adding inorganic fillers to polymers, it will inevitably reduce its mechanical properties and extrus

Method used

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  • Low smoke halogen-free flame retardant sheath material for optical fiber cable, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (a). Take 1.2 parts of carbon black to make a masterbatch, add 58.2 parts of base material and mix;

[0041] (b). Surface treatment of the flame retardant with the coupling agent: first dry 30 parts of the flame retardant until the water content is less than 0.5%, then add 1 part of the coupling agent and 30 parts of the flame retardant into the mixer at the same time, Mix at 90°C for 8-10 minutes to modify the surface and further remove water;

[0042] (c). Mix 1.2 parts of carbon black masterbatch, 0.8 part of antioxidant, 0.8 part of plastic brightener, and 1.2 parts of softener for 10 minutes;

[0043] (d). The small dose of mixed material obtained in step (c) is added to the flame retardant treated with the coupling agent and mixed for 10 minutes;

[0044] (e). The mixture obtained in step (d) is added to PE and mixed uniformly;

[0045] (f). Then put the mixture in the step (d) into the extruder, masticate in the extruder, the masticating temperature is 170° C.,...

Embodiment 2

[0048] (a). Take 1.5 parts of carbon black to make a masterbatch, add 60 parts of base material and mix;

[0049] (b). Surface treatment of the coupling agent on the flame retardant: first dry 32 parts of the flame retardant until the water content is less than 0.5%, then add 0.8 parts of the coupling agent and 32 parts of the flame retardant into the mixer at the same time, Mix at 90°C for 8-10 minutes to modify the surface and further remove water;

[0050] (c). Mix 1.5 parts of carbon black masterbatch, 1.5 parts of antioxidant, 1.2 parts of plastic brightener, and 1.5 parts of softener for 10 minutes;

[0051] (d). The small dose of mixed material obtained in step (c) is added to the flame retardant treated with the coupling agent and mixed for 10 minutes;

[0052] (e). The mixture obtained in step (d) is added to PE and mixed uniformly;

[0053] (f). Then put the mixture in the step (d) into the extruder, masticate in the extruder, the masticating temperature is 170° C....

Embodiment 3

[0056] (a). Take 2 parts of carbon black to make a masterbatch, add 62 parts of base material and mix;

[0057] (b). Surface treatment of the flame retardant by the coupling agent: first dry 29 parts of the flame retardant until the water content is less than 0.5%, then add 1.6 parts of the coupling agent and 29 parts of the flame retardant into the mixer at the same time, Mix at 90°C for 8-10 minutes to modify the surface and further remove water;

[0058] (c). Mix 2 parts of carbon black masterbatch, 1.8 parts of antioxidant, 1.6 parts of plastic brightener, and 2 parts of softening agent for 10 minutes;

[0059] (d). The small dose of mixed material obtained in step (c) is added to the flame retardant treated with the coupling agent and mixed for 10 minutes;

[0060] (e). The mixture obtained in step (d) is added to PE and mixed uniformly;

[0061] (f). Then put the mixture in the step (d) into the extruder, masticate in the extruder, the masticating temperature is 170° C...

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Abstract

The invention relates to a low smoke halogen-free flame retardant sheath material for an optical fiber cable, and a preparation method thereof. Components of the material comprise a polyolefin base material, a flame retardant, an antioxidant, carbon black and an additive, wherein the carbon black is channel black, the base material is PE added with EVA, the antioxidant adopts a phenol antioxidant as a main antioxidant and adopts a phosphite antioxidant as a synergetic antioxidant, the additive comprises a coupling agent, a lubricant, a brightening agent, a lubricant and a synergistic flame retardant, and the flame retardant is a hydrated metal oxide. The preparation method comprises: making the carbon black into masterbatch; carrying out a modification treatment on the flame retardant with the coupling agent; mixing the carbon black masterbatch, the antioxidant, the brightening agent and an softener, and then adding the mixed material to the coupling agent-modified flame retardant to mix; adding the resulting mixture to a plastic extruder to carry out mastication extrusion to obtain the finished product. The flame retardant sheath material of the present invention has characteristics of low smoke, low toxicity, no halogen, environmental protection, low cost, and good comprehensive performance.

Description

technical field [0001] The invention relates to a material and a preparation method thereof, in particular to a low-smoke halogen-free flame-retardant sheath material for optical cables and a preparation method thereof. Background technique [0002] The optical cables used in certain environments are required to have flame retardant properties. For example, optical cables used in subways, tunnels, oil, coal mines, buildings, computer rooms, public buildings, etc. At this time, flame-retardant materials should be used to make cable sheaths, especially with the rapid development of fiber-to-the-home (FTTH), indoor optical cables, especially leather cables (access network butterfly cables), must use flame-retardant sheath materials , Flame-retardant sheath materials are usually divided into two categories, one is polyvinyl chloride flame-retardant (PVC) sheath material, and the other is polyolefin flame-retardant (such as EVA, PE) sheath material. [0003] Chlorine atoms (hal...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K3/04C08K3/22C08K3/38G02B6/44
Inventor 石明於茹敏陈炳炎
Owner JIANGSU NANFANG COMM TECH
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