Preparation method for conductive polymer sheathing material

A technology of conductive polymer and sheath material, applied in conductive materials, conductors, circuits and other directions dispersed in non-conductive inorganic materials, can solve the problems of poor soil corrosion resistance, affecting service life and high price, and achieve soil resistance The effect of good corrosion performance, good aging resistance and low cost

Inactive Publication Date: 2011-08-17
QINGDAO WEDONK POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is a material recorded in the literature to replace the original lead, which is a magnesium-aluminum-zinc-rare earth alloy sheath through the ground wire, and the lead alloy is replaced by the sheath material aluminum-zinc-magnesium-rare earth alloy (abbreviated as alloy aluminum). The volume resistivity of this material is 1 / 7 of that of lead, and its strength is more than 10 times that of lead. However, the price of this alloy material is high, its density is high, and its resistance to soil corrosion is poor, which affects its service life.

Method used

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  • Preparation method for conductive polymer sheathing material
  • Preparation method for conductive polymer sheathing material
  • Preparation method for conductive polymer sheathing material

Examples

Experimental program
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Effect test

Embodiment 1

[0013] In this embodiment, the thermoplastic resin is used as a mixture of one or more of 59-30% LLDPE, LDPE or EVA by thermoplastic resin by mass percentage; -35%; conductive carbon fiber is 5-14%; toughening agent is 10-18% of POE, EPDM or both; dispersant polyethylene wax is 1.0-3.0%; processing aid is 0.5-1.5 %; The processing aid is one or more of the thermal oxygen aging agent B225, the acid absorbing agent zinc stearate and the diluent white oil; the above-mentioned raw materials are mixed and stirred through a twin-screw extruder combined with a special screw , under the condition of controlling the processing temperature at 180-220°C, melt, extrude, cool, pelletize, dry and pack to obtain the conductive sheath material product; The technical specifications of the wire are tested for performance, and the physical performance parameters are shown in Table 1.

[0014] Table 1: Product physical properties and test methods

[0015]

[0016]

[0017] The conductive ...

Embodiment 2

[0022] This embodiment uses the conductive polymer sheath material prepared in Example 1 to prepare a through-ground wire suitable for the conductive polymer sheath. First, the thermoplastic polymer resin, conductive carbon black, and carbon fiber , toughening agent, dispersant and processing aids, mixed and stirred, and then melted, extruded, cooled, pelletized, dried and packaged into a sheath material by a twin-screw extruder with a special screw combination. Wherein the mass percent of each component of the mixture can be adjusted according to the product specification and the raw materials of different manufacturers, and the three kinds of products prepared respectively by the three proportionings in Table 3 have their properties shown in Table 4 respectively.

[0023] Table 3: Composition and ratio of conductive polymer sheath material

[0024]

[0025] Table 4: Product physical properties and test methods

[0026]

[0027]

[0028] The test results of this emb...

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Abstract

The invention belongs to the technical field of organic materials, relating to a preparation method for a conductive polymer sheathing material. The conductive polymer sheathing material comprises the following components in percent by mass: 60-30 percent of thermoplastic polymer resin, 25-30 percent of nanometer conductive carbon black, 5-14 percent of conductive carbon fiber or conductive agent, 10-18 percent of flexibilizer and 0.5-1.5 percent of processing aid and 1-3 percent of dispersing agent. The preparation method comprises the steps of: mixing and stirring well the raw materials of all the components and forming a product by melting, extruding, cooling, granulating, drying and packaging with a double-screw extruder; or adding a mixture consisting of the raw materials of all the components into an internal mixer for complete kneading, mixing and dispersing, then conducting mixing, rolling, laminating and crushing with a double-roller open mill and forming the product by melting, extruding, cooling, granulating, drying and packaging with a single-screw extruder. The preparation method has a simple process, and the conductive polymer sheathing material has the advantages of good electrical properties, low cost and production environment protection performance.

Description

Technical field: [0001] The invention belongs to the technical field of organic materials, and relates to a technical method for preparing a conductive polymer sheath composite material, which is used as a wire and cable material for railway penetration ground wires, in particular to a conductive polymer sheath material for railway penetration The preparation method is that the conductive polymer sheath comprises a first extruded inner sheath arranged outside the anticorrosion conductive coating and a second extruded outer sheath located on the outer periphery of the inner sheath. Background technique: [0002] With the rapid development of railways, railway-specific communication signals are rapidly developing in the direction of modernization and digitalization, which puts forward higher requirements for the reliability of the grounding of the signal system. Therefore, integrated through-ground cables have emerged as the times require. The comprehensive through-ground cabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08L23/08C08L23/06C08L31/04C08L23/16C08K13/04C08K7/06C08K3/04H01B1/24H01B7/17
Inventor 宋钦兰王林茂丁玉梅
Owner QINGDAO WEDONK POLYMER MATERIAL
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