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Bus bar heat-shrinkable tube and preparation method thereof

A heat-shrinkable tube and busbar technology, applied in the field of heat-shrinkable tube and its preparation, can solve the problems of difficult construction, poor insulation performance, short service life, etc., and achieve excellent corrosion resistance, good flame retardant performance, high and low temperature resistance. Superior effect of aging

Active Publication Date: 2013-02-13
CHANGYUAN ELECTRONICS DONGGUAN +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a busbar heat-shrinkable tube with good insulation performance, long service life and convenient construction to overcome the problems of poor insulation performance, short service life and difficult construction of the existing busbar heat-shrinkable tubes. Tube and method for its preparation

Method used

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  • Bus bar heat-shrinkable tube and preparation method thereof
  • Bus bar heat-shrinkable tube and preparation method thereof
  • Bus bar heat-shrinkable tube and preparation method thereof

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preparation example Construction

[0057] The preparation method for preparing the above-mentioned busbar heat shrinkable tube includes the following steps:

[0058] Step 1: Weigh 60-80 parts of basic resin, 20-40 parts of ethylene-propylene rubber, 5-8 parts of dimethyl silicone oil, 40-70 parts of flame retardant, 4-10 parts of antioxidant, nano-montmorillonite 2-4 parts of soil, 2-5 parts of lubricant, 4-8 parts of masterbatch;

[0059] Step 2: After mixing and granulating with an internal mixer or a parallel twin-screw extruder, extrude into a pipe with a single-screw extruder;

[0060] Step 3: Treat the outer surface of the extruded pipe with infrared light with a wavelength of 700nm-1600nm at a distance of 5-10cm from the die of the extruder;

[0061] Step 4: The tube is cross-linked by cobalt 60 or electron accelerator 50-160KGy radiation, and the tube after radiation cross-linking is expanded 2-4 times at a temperature of 85-135°C.

preparation Embodiment 1

[0063] The various components were weighed according to the weights listed in the table below.

[0064] The above-mentioned materials are mixed and granulated by an internal mixer, and then extruded into pipes by a single-screw extruder.

[0065] The outer surface of the extruded pipe is treated with infrared light with a wavelength of 700-1600nm at a distance of 5-10cm from the die of the extruder.

[0066] The tube is cross-linked by cobalt 60 or electron accelerator 50KGy radiation, and the tube after radiation cross-linking is expanded 2.5 times at a temperature of 95°C to obtain a busbar heat-shrinkable tube, and its properties are as follows.

[0067] Flame retardant: passed the IEC60332 flame retardant test.

[0068] The tensile strength is 12.6MPa, and the elongation at break is 645%.

[0069] After 120°C / 168h aging and -55°C / 4h low temperature treatment, the power frequency withstand voltage test and lightning impact test passed.

[0070] After the heat-shrinkabl...

preparation Embodiment 2

[0073] The various components were weighed according to the weights listed in the table below.

[0074]

[0075] The above-mentioned materials are mixed and granulated by an internal mixer, and then extruded into pipes by a single-screw extruder.

[0076] The outer surface of the extruded pipe is treated with infrared light with a wavelength of 700-1600nm at a distance of 5-10cm from the die of the extruder.

[0077] The tube is cross-linked by cobalt 60 or electron accelerator 160KGy radiation, and the tube after radiation cross-linking is expanded 2.5 times at a temperature of 105°C to obtain a busbar heat-shrinkable tube, and its properties are as follows:

[0078] Flame retardant: passed the IEC60332 flame retardant test.

[0079] The tensile strength is 14.7MPa, and the elongation at break is 528%.

[0080] After 120°C / 168h aging and -55°C / 4h low temperature treatment, the power frequency withstand voltage test and lightning impact test passed.

[0081] After the he...

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Abstract

The invention relates to a bus bar heat-shrinkable tube which is prepared from the following components in parts by weight: 60-80 parts of base resin, 20-40 parts of ethylene-propylene rubber, 5-8 parts of dimethyl silicon oil, 40-70 parts of flame retardant, 4-10 parts of antioxidant, 2-4 parts of nano montmorillonite, 2-5 parts of lubricant and 4-8 parts of color batch. The preparation method of the bus bar heat-shrinkable tube comprises the following steps: 1. weighing the components according to parts by weight; 2. mixing and granulating with a Banbury mixer or parallel double screw extruder, and extruding with a single screw extruder to obtain a tube; 3. treating the external surface of the extruded tube with infrared light, of which the wavelength is 700-1600nm, in the position 5-10cm away from the extrusion die of the extruder; and 4. carrying out radiation crosslinking on the tube with cobalt 60 or electron accelerator 50-160kGy, and expanding the tube subjected to radiation crosslinking at 85-135 DEG C. The bus bar heat-shrinkable tube provided by the invention has the advantages of favorable insulating property and long service life, and is convenient for construction.

Description

technical field [0001] The invention relates to a heat-shrinkable tube and a preparation method thereof, in particular to a heat-shrinkable tube for busbar insulation protection and a preparation method thereof. Background technique [0002] Busbar heat-shrinkable tubes are widely used in various substations, transformers, and switch cabinets for busbar insulation protection. In the "Twelfth Five-Year Plan" of the country, it is clearly stated that "continue to promote the transformation of rural power grids", "strengthen power grid construction, and develop smart grids "Guidelines. For the transformation of rural power grids alone, the investment scale during the 12th Five-Year Plan period will be 300-500 billion yuan. With the strengthening of power infrastructure construction, it is estimated that the market size of high-performance busbar heat-shrinkable tubes with a voltage level of 10-36kV per year In 4 to 500 million yuan. [0003] However, for a long time, most of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08L33/12C08L33/08C08L31/04C08L23/20C08L23/16C08L83/04C08K13/02C08K3/22C08K5/3492C08K3/32C08K3/34C08J3/28C08J3/24
Inventor 刘晓播曾志安邱光南李可涛徐成杨剑松
Owner CHANGYUAN ELECTRONICS DONGGUAN
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