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Aramid fiber/carbon fiber composite core stranded wire and preparation device and preparation method thereof

A kind of aramid fiber and carbon fiber technology, which is applied in the field of composite core preparation and modification, can solve the problems of limited effect and long reaction time, and achieve the effect of reducing sudden accidents, improving safety factor and low line loss

Inactive Publication Date: 2020-12-11
福建创立佳科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effect of surface treatment by this method is limited, and the reaction time is relatively long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] The invention relates to a preparation method for preparing an aramid / carbon fiber composite core stranded wire. The aramid fiber is used as the outer layer, the carbon fiber composite core is used as the core layer, and the fiber and epoxy resin are compounded by a pultrusion molding process. Select 6.5mm, the volume ratio of fiber to resin is 3:2, and the ratio of aramid fiber to carbon fiber is 1:1. Prepare epoxy resin and prepreg, select epoxy resin and its curing agent, the weight ratio of epoxy resin: curing agent: release agent = 10:10:1; the fiber passes through the prepreg tank for prepreg treatment, the volume ratio Epoxy resin: diluent = 1:3; the fiber passes through the glue tank and is glued; it enters the mold and is cured in three stages, and the temperature is set at 240°C, 250°C, and 240°C; The mold is cured, and then the mold is released, passed through a tunnel oven, and post-cured. The prepared samples are respectively wound on different coils and co...

Embodiment 1

[0041] A kind of pultrusion preparation method of glass fiber tape-coated aramid strand, comprising the following steps:

[0042] (1) In this experiment, high-temperature-resistant epoxy resin is selected, and the corresponding curing agent is modified methyl tetrahydrophthalic anhydride, and the weight ratio of epoxy resin: curing agent: release agent is 10:10:1.

[0043] (2) Select a mold with a die opening diameter of 2.5mm, and prepare seven batches of pultrusion samples respectively, set the speed of the tractor at 8cm / min, and set the three-stage curing temperature at 240°C, 250°C, and 240°C;

[0044] (3) The sample obtained by the first pultrusion is subjected to the second pultrusion process, and the seven-heel pultrusion sample is twisted into a twisted sample through a rotating die. The three-stage curing temperature is 180°C, 190°C, and 180°C;

[0045] (4) At the same time of stranding, introduce two glass fiber tapes on both sides at the position of the die inlet, ...

Embodiment 2

[0049] A preparation process of aramid fiber and carbon fiber cable composite core, comprising the following steps:

[0050] Preparatory work before pultrusion, preparation of epoxy resin and prepreg, selection of epoxy resin and its curing agent, weight ratio of epoxy resin: curing agent: release agent = 10:10:1; the fiber passes through the prepreg tank , for prepreg treatment, the volume ratio of epoxy resin: diluent = 1:3; the fiber passes through the glue tank and is glued; it enters the mold and is cured in three stages, and the temperature is respectively set at 260°C, 270°C, and 260°C; The mold is post-cured in a tunnel oven, and the obtained samples are wound on different coils for collection; the prepared samples are used for secondary pultrusion, and the inner wall of the mold is changed to a rotary type without heating. The root product passes through the central cluster hole, and then the four optical fiber products are evenly distributed in the four cluster holes...

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Abstract

The invention belongs to the field of composite core preparation and modification, and particularly relates to a preparation method for preparing an aramid fiber / carbon fiber composite core stranded wire. In the aramid fiber / carbon fiber composite core stranded wire, the aramid fiber is used as an outer layer, a carbon fiber composite core is used as a core layer, the aramid fiber, the carbon fiber and the epoxy resin composition are compounded through a pultrusion process, and the stranded wire adopts an aramid fiber-carbon fiber-aramid fiber staggered concentric annulus arrangement mode fromoutside to inside. Compared with a conventional single-fiber pultrusion sample, the composite core sample has the advantages that the bonding performance of resin and fibers is greatly improved, thetensile strength of the stranded wire is also greatly improved, the strength is high, high temperature resistance is achieved, the wire loss is low, intelligence is achieved, the safety coefficient isgreatly improved, the reliability and safety of the intelligent power grid and the power supply line are improved, and accidents caused by natural disasters are effectively reduced.

Description

technical field [0001] The invention belongs to the field of preparation and modification of composite cores, and in particular relates to a preparation method for preparing aramid fiber / carbon fiber composite core stranded wires. Background technique [0002] Overhead transmission lines generally use steel-cored aluminum stranded wires with steel strands in the center. At present, carbon fiber pultruded products are often used as supporting materials in the preparation process of cable cores. However, accidents have frequently occurred recently and there are still some problems. In some It has been banned in engineering applications. For example, the combination of soft aluminum and carbon fiber composite core can effectively reduce the line loss, but the soft aluminum has low mechanical strength and is easy to be damaged, and the carbon fiber composite core cannot realize continuous tension pay-off with continuous fittings. And the price is relatively high. Based on the a...

Claims

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Application Information

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IPC IPC(8): H01B7/18H01B7/29H01B9/00H01B13/00H01B13/22
CPCH01B7/1825H01B7/292H01B9/00H01B13/00H01B13/22
Inventor 孔海娟徐前刘胜春余木火曹元智王景朝陈海龙
Owner 福建创立佳科技有限公司