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Composite core for power grid transmission line wire and preparation method thereof

A technology for transmission lines and composite cores, applied in circuits, power cables, electrical components, etc., can solve problems such as emphasizing the tensile strength of composite cores, and achieve the effects of easy operation, simple preparation method, and fast molding speed

Active Publication Date: 2012-06-27
CHINA ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The composite core prepared by the application of the present invention has good tensile strength, but there is no raw material specially added to improve the toughness of the material in the preparation raw materials of the composite core, only the tensile strength of the composite core is emphasized

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] The resin formula involved in the preparation process of the novel high-toughness carbon fiber composite core of the present invention is according to the following ratio: 100 parts of thermosetting resin (glycidyl ether epoxy resin), 100 parts of curing agent (acid anhydride), accelerator ( Amines) 8 parts, nanoparticles (nano-montmorillonite) 5 parts, toughening agent (polyether polyols) 10 parts, mold release agent (stearic acid) 3 parts.

[0067] The temperature of the glue tank is constant at 60°C, and the temperature of the resin-infiltrated carbon fiber in the preheating zone at the front of the mold is 100°C.

[0068] The front-stage curing mold corresponding to the preparation process of the novel high-toughness composite core described in the present invention corresponds to a first heating zone of 160°C; a second heating zone of 180°C; and a third heating zone of 170°C. In the post-curing section, a four-stage continuous heating method is adopted, and the tem...

Embodiment 2

[0072] The resin formula involved in the preparation process of the novel high-toughness composite core according to the present invention is as follows: 100 parts of resin (glycidyl ether epoxy resin), 100 parts of curing agent (acid anhydrides), accelerator (amines) ) 12 parts, nanoparticles (nanometer SiO 2 ) 3 parts, toughening agent (hyperbranched polyamide ester) 20 parts, release agent (stearic acid) 5 parts.

[0073]The temperature of the glue tank is constant at 60°C, and the temperature of the resin-infiltrated carbon fiber in the preheating zone at the front of the mold is 110°C.

[0074] The front-stage curing mold corresponding to the preparation process of the new high-toughness composite core described in the present invention corresponds to a first heating zone of 145°C; a second heating zone of 180°C; and a third heating zone of 175°C. In the post-curing section, a four-stage continuous heating method is adopted, and the temperature in the heating section is ...

Embodiment 3

[0078] The resin formula involved in the preparation process of the novel high-toughness composite core of the present invention is according to the following ratio: 100 parts of resin (aromatic polyether glycidyl ether epoxy resin), 110 parts of curing agent (acid anhydrides), accelerator (amines) 10 parts, nanoparticles (nanometer SiO 2 ) 2 parts, toughening agent (polyether ether ketone) 18 parts, release agent (stearic acid) 5 parts.

[0079] The temperature of the glue tank is constant at 60°C, and the temperature of the resin-infiltrated carbon fiber in the preheating zone at the front of the mold is 110°C.

[0080] The front-stage curing mold corresponding to the preparation process of the novel high-toughness composite core described in the present invention corresponds to a first heating zone of 150°C; a second heating zone of 185°C; and a third heating zone of 170°C. In the post-curing section, a four-stage continuous heating method is adopted, and the temperature i...

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Abstract

The invention provides a composite core for a power grid transmission line wire and a preparation method thereof. The composite core has high strength, high toughness, high glass-transition temperature and surface cleanness. Materials of the composite core comprise a resin material and a strengthening material. The resin material comprises a thermosetting resin, a curing agent, an accelerating agent, a releasing agent, a flexibilizer and nanometer particles. The strengthening material is one kind or a plurality of kinds of carbon fiber, glass fiber, basalt fiber, boron fiber, aramid fiber, silicon carbonate fiber and protein bound iodine (PBI) fiber. The content of composite core fiber Vf=50-80%, tensile strength of the composite core is not lower than 2100MPa, and glass transition temperature of the composite core is not lower than 180 DEG C. The toughness of the composite core is remarkably improved, and breakage and cracking probability caused by brittleness factors in production, transportation and wire hanging construction processes are reduced.

Description

technical field [0001] The invention belongs to the field of molding composite materials, that is, plastic materials containing reinforcing materials, fillers or preforms, and specifically relates to a composite core used for power grid transmission line conductors and a preparation method thereof. Background technique [0002] Steel-cored aluminum stranded wire is a reinforced wire with single-layer or multi-layer aluminum strands twisted outside the galvanized steel core wire. The laying of special geographical conditions such as valleys has the characteristics of good electrical conductivity, sufficient mechanical strength, high tensile strength, and the distance between towers and poles can be enlarged. Therefore, it is widely used in overhead transmission and distribution lines of various voltage levels. [0003] Modern industry's increasing requirements for power supply reliability and power quality, as well as the gradual increase in power load demand, pose a more se...

Claims

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Application Information

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IPC IPC(8): C08L61/06C08L61/24C08L61/28C08L63/00C08L75/04C08L79/08C08K13/04C08K7/06C08K7/14C08K7/10B29C70/50H01B9/00
Inventor 刘辉陈新张卓何州文兰逢涛徐丽陈云
Owner CHINA ELECTRIC POWER RES INST
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