Safety type self-temperature-limiting electric tracing band and preparation method thereof

An electric heating cable and self-limiting temperature technology, which is applied to the shape of heating elements, other household appliances, household components, etc., can solve the problems of poor flame retardancy and fracture

Inactive Publication Date: 2022-04-26
安徽久泰电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a safe self-limiting temperature electric heating cable and its preparation method, through the modified polystyrene and synergistic cross-linking agent to solve the poor flame retardancy of the electric heating cable insulation material at the present stage, and the long-term bending There will be a problem of breaking after use

Method used

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  • Safety type self-temperature-limiting electric tracing band and preparation method thereof
  • Safety type self-temperature-limiting electric tracing band and preparation method thereof
  • Safety type self-temperature-limiting electric tracing band and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A safe self-limiting temperature electric heating cable is composed of nano conductive carbon black and two parallel busbars plus an insulating layer. The insulating layer is made by the following steps:

[0043] Dissolve modified polystyrene in N,N-dimethylformamide, stir at a speed of 150r / min and a temperature of 20°C, add a synergistic cross-linking agent, mix well, and add it to the mold , to be cured to obtain an insulating layer.

[0044] Modified polypropylene is made by the following steps:

[0045] Step A1: Mix aluminum trichloride and carbon tetrachloride evenly, stir at 200r / min and 10°C, add toluene, and react for 1 hour at 40°C to prepare To obtain intermediate 1, mix intermediate 1 and deionized water uniformly, under the condition of a temperature of 110°C, reflux for 1 hour, filter and remove the filtrate, and mix the filter cake, carbon tetrachloride, and potassium permanganate uniformly, Under the condition of rotation speed of 150r / min and temperatur...

Embodiment 2

[0053] A safe self-limiting temperature electric heating cable is composed of nano conductive carbon black and two parallel busbars plus an insulating layer. The insulating layer is made by the following steps:

[0054] Dissolve modified polystyrene in N,N-dimethylformamide, stir at a speed of 180r / min and a temperature of 25°C, add a synergistic cross-linking agent, mix well, and add it to the mold , to be cured to obtain an insulating layer.

[0055] Modified polypropylene is made by the following steps:

[0056] Step A1: Mix aluminum trichloride and carbon tetrachloride evenly, stir at 200r / min and 13°C, add toluene, and react for 1.3h at 45°C. Prepare intermediate 1, mix intermediate 1 and deionized water evenly, under the condition of 115°C, reflux for 1.3h, filter and remove the filtrate, and mix the filter cake, carbon tetrachloride, and potassium permanganate Evenly, under the conditions of rotating speed of 180r / min and temperature of 105°C, reflux reaction was carr...

Embodiment 3

[0064] A safe self-limiting temperature electric heating cable is composed of nano conductive carbon black and two parallel busbars plus an insulating layer. The insulating layer is made by the following steps:

[0065] Dissolve modified polystyrene in N,N-dimethylformamide, stir at a speed of 200r / min and a temperature of 30°C, add a synergistic cross-linking agent, mix well, and add it to the mold , to be cured to obtain an insulating layer.

[0066] Modified polypropylene is made by the following steps:

[0067] Step A1: Mix aluminum trichloride and carbon tetrachloride evenly, stir at 300r / min, and add toluene at a temperature of 15°C, and react for 1.5h at a temperature of 50°C. Prepare intermediate 1, mix intermediate 1 and deionized water evenly, under the condition of 120°C, reflux for 1.5h, filter and remove the filtrate, and mix the filter cake, carbon tetrachloride, and potassium permanganate Evenly, under the condition of rotating speed of 200r / min and temperatur...

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Abstract

The invention discloses a safety type self-temperature-limiting electric tracing band and a preparation method thereof.The electric tracing band is composed of nanometer conductive carbon black, two parallel buses and an insulating layer, the insulating layer is prepared by crosslinking modified polypropylene and a synergistic crosslinking agent, a modified polypropylene molecular chain contains a large number of phosphorus oxyacid structures, and the modified polypropylene molecular chain contains a large number of phosphorus oxyacid structures; polyphosphoric acid with strong dehydration property can be generated during combustion, oxygen-containing functional groups are dehydrated and carbonized, a condensed phase flame-retardant effect is played, and the oxygen-containing functional groups are attached to the surface of the material to form a carbon layer, so that the flame-retardant effect is ensured, flame-retardant substances are not volatilized and separated out, and the flame retardance is ensured; the synergistic cross-linking agent is added into the modified polypropylene, so that the amino on the synergistic cross-linking agent reacts with the epoxy group on the modified polypropylene to form a grid structure, and meanwhile, the side chain contains a large number of unsaturated long chains, so that the prepared electric tracing band has good toughness and is prevented from being broken.

Description

technical field [0001] The invention relates to the technical field of electric heating cable preparation, in particular to a safe self-limiting temperature electric heating cable and a preparation method thereof. Background technique [0002] Electric heating cables are mainly used for anti-freezing and heat preservation of tanks, pipes, and tanks of industrial equipment, and can also be used for heating other containers. When in use, they are directly wound on the surface of the heated part. It is easy to install, easy to use, safe and reliable. Electric heating cables It is composed of a conductive polymer, two parallel metal wires and an insulating sheath. It is characterized in that the conductive polymer has a high positive temperature coefficient and is connected in parallel with each other. It can automatically adjust the output power with the temperature change of the heated system. Automatically Limit the heating temperature, it can be arbitrarily shortened or exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C39/10B29C39/22H05B3/56C08F220/60C08F212/08C08F220/32C08J3/24C08L25/14B29L31/34
CPCB29C39/10B29C39/22H05B3/565C08F220/60C08F212/08C08F220/325C08J3/24C08J2325/14B29L2031/34
Inventor 卜基峰孙祥卜兴明
Owner 安徽久泰电气有限公司
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