Polyolefin composite material for butterfly optical cable sheath and preparation method thereof

Abstract

The invention relates to a polyolefin composite material for a butterfly optical cable sheath and a preparation method thereof. The polyolefin composite material consists of the following components: 20-25 parts of EVA ethylene-vinyl acetate copolymer resin, 10-20 parts of LLDPE linear low density polyethylene resin, 5-10 parts of a maleic anhydride grafted polyolefin modifier, 55-60 parts of a calcium carbonate filler, 0.1-0.2 part of an antioxidant, and 0.5-2.0 parts of a self-made efficient lubricant. The EVA ethylene-vinyl acetate copolymer resin requires a VA content of 18-28% and an MI value of 1-8g/10min; the LLDPE linear low density polyethylene resin has a density of 0.912g/cm<3> and an MI value of 1-3.5g/10min; the grafting resin substrate of the maleic anhydride grafted polyolefin modifier is PE or PE/POE; and the calcium carbonate filler is light calcium carbonate or 2500-mesh heavy calcium carbonate. The polyolefin composite material provided by the invention has the advantage of low casting, fast extrusion speed and smooth appearance, and the finished product butterfly optical cable has good wrapping force, and the tensile strength and flame retardant properties are greatly improved.

Description

technical field [0001] The invention relates to a polyolefin sheath material for an indoor butterfly optical cable and a self-supporting butterfly optical cable, in particular to a polyolefin composite material for a butterfly optical cable sheath and a preparation method thereof. Background technique [0002] With the development of optical communication networks and the continuous deepening of fiber-to-the-home projects, the construction of fiber-optic access projects is growing exponentially. There are more and more optical cables used in optical fiber access networks, and the amount of related cable sheath materials is also used year by year. rise. Low-smoke halogen-free polyolefin cable materials for communication optical cable sheaths should be in accordance with the relevant technical requirements of YD / T 1113-2001. The manufacturer's requirements for polyolefin cable materials for butterfly cable sheaths are only elongation at break ≥ 150%, strength ≥ 10Mpa and no o...

AI Technical Summary

Problems solved by technology

Low-smoke halogen-free polyolefin cable materials for communication optical cable sheaths should be in accordance with the relevant technical requirements of YD / T 1113-2001. The manufacturer's requirements for polyolefin cable materials for butterfly cable sheaths are only elongation at break ≥ 150%, strength ≥ 10Mpa and no oxygen index requirements.

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