Raw material particles containing sludge and polyvinyl chloride for preparing electric wire and cable protective sleeve material and preparation method thereof

Abstract

The invention discloses raw material particles containing sludge and polyvinyl chloride for preparing an electric wire and cable protective sleeve material and a preparation method thereof. The raw material particles are prepared from 100 parts of polyvinyl chloride (PVC), 20 to 60 parts of sludge fine powder, 0.2 to 1 part of indianite, 0.2 to 1 part of needle-shaped wollastonite, 1 to 10 parts of rutile type titanium dioxide, 10 to 30 parts of nano calcium carbonate, 5 to 20 parts of precipitated white carbon black, 10 to 30 parts of epoxidized soybean oil, 2 to 4 parts of a liquid calcium-zinc stabilizer, 4 to 10 parts of chlorinated paraffin, 0.8 to 1.6 parts of stearic acid, 1 to 5 parts of aluminate and 10 to 20 parts of dioctyl phthalate. The preparation method comprises the following steps: stirring at a high speed to prepare dispersed modified powder A; meanwhile, preparing a PVC-based modified organic carrier material B; then mixing the materials A and B while stirring at a high speed; and finally, granulating through double screw rods-single screw rod extrusion. The prepared particles can be used as a protective sleeve layer material of electric wires and cables. The environment-friendly particles prepared by the preparation method are easy to process and mold and the mechanical, electrical and anti-ageing properties of the prepared terminal protective sleeve material are excellent; and the particles can be used in fields including industrial or civilian electric wires and cables.

Description

technical field [0001] The invention belongs to the resource utilization of sludge produced by urban sewage treatment plants, the processing of organic and inorganic composite materials and the corresponding application fields, and specifically relates to a kind of sludge and polyvinyl chloride used for preparing wire and cable sheath materials Raw material particles and preparation method thereof. Background technique [0002] At present, the protection of the ecological environment and the efficient use of natural resources are hot and difficult issues facing scientific researchers. Green environmental protection concepts such as energy saving and consumption reduction are gradually permeating people's daily production and life. As far as the traditional plastic industry is concerned, based on the intrinsic properties of its materials and their sources, there are the following application limitations or disadvantages, which are specifically reflected in: First, given that ...

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Problems solved by technology

Sludge is an extremely rich natural solid waste resource. In the method of sludge disposal, the traditional and simplest method is direct landfill, but landfill treatment not only occupies a large amount of land resources, but also has potential environmental pollution. Pollution risk, mainly because the harmful substances in the buried sludge may seep into the ground, and the mobile heavy metal elements will be released into the ecological environment, causing harm to the ecological environment and people's physical and mental health

On the other hand, with the expansion of urbanization and industrialization, the output of sludge has also increased rapidly, and the surge in land demand has also made the landfill method no longer suitable for the sustainable and coordinated green development of the current society. Facing the serious shortage of landfill sites, the direct landfill method is gradually abandoned

Secondly, because the sludge is rich in organic matter, researchers have also tried to re-use sludge in the field of landscaping, but there is a risk of spreading organic matter and pathogens in the sludge when using sludge for landscaping. Migration of related heavy metals and harmful elements, and the demand for sludge for landscaping is small, which cannot really solve the problem of sludge output

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