Sheath material for optical fiber cable, and production process thereof

A technology of sheath material and optical cable, applied in the direction of fiber mechanical structure, etc., can solve the problem of single performance of optical cable sheath material, achieve low water vapor permeability, improve performance, and meet the requirements of use
CN102807693AInactive Publication Date: 2012-12-05JIANGSU NANFANG COMM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
JIANGSU NANFANG COMM TECH
Publication Date
2012-12-05
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to a sheath material for an optical fiber cable, and a production process thereof. The sheath material comprises, by weight, 85-95% of a polyolefin base material, 2.35-2.85% of carbon black, 0.5-1% of an antioxidant, and 0.8-1% of an additive, wherein the polyolefin base material comprises a polyethylene base material and a modifier, and the additive comprises a fluorine-containing rheological agent PPA, a lubricant, a plastic brightening agent and a softener. During production, carbon black is made into a masterbatch; PPA is made into a masterbatch by using a polyethylene base material; the carbon black masterbatch, the PPA masterbatch, an antioxidant, a plastic brightening agent and a softener are mixed; the mixed material is added to EVA to mix; the resulting mixture is added to polyethylene to mix, and then mastication extrusion is performed through a plastic extruder. According to the present invention, high and medium density polyethylene is adopted as a base material for the optical fiber cable sheath, such that a chemical performance is stable; and various auxiliary materials are added to the polyethylene base material, such that performances of the optical fiber cable sheath are improved, and various use requirements of the optical fiber cables are met.
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Description

technical field

[0001] The invention relates to the technical field of optical fiber and cable, in particular to a formula for making a sheath material for an optical cable and a manufacturing process thereof. Background technique

[0002] The outer sheath of the optical cable is the first barrier for the optical cable to withstand environmental conditions (temperature changes, chemical corrosion, sun and rain, etc.), so the optical cable sheath must be strictly selected. Usually, the sheath material is black polyethylene sheath material, and according to industry standards, high-density polyethylene (HDPE), medium-density polyethylene (MDPE) or linear low-density polyethylene sheath material (LLDPE) should be used.

[0003] The mechanical properties of high-density polyethylene and medium-density polyethylene, such as tensile strength, bending strength, compressive strength, shear strength, hardness and wear resistance, are superior to those of low-density polyethylene, and...

Claims

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