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Material formula of hot tear resisting type heat-shrinkable busbar protecting sleeve and production method thereof

A protective sleeve and tear-resistant technology, applied in the field of heat-shrinkable tube materials, can solve problems such as cracking of heat-shrinkable tubes, and achieve the effects of no increase in crack length, excellent high temperature tear resistance, and excellent flame retardant performance.

Inactive Publication Date: 2018-03-13
SHENZHEN WOER HEAT SHRINKABLE MATERIAL +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problem that heat-shrinkable tubes are prone to cracking at high temperatures, the invention provides a high-temperature tear-resistant heat-shrinkable busbar protection sleeve and a production method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Mix 20 parts of linear low density polyethylene (LLDPE), 60 parts of ethylene-octene block copolymer (melt index 1 g / 10min, density 0.877 g / cm 3 ), 15 parts of acrylate rubber (Mooney viscosity is 22ML (1+4)@100℃), 5 parts of ethylene-acrylate-maleic anhydride terpolymer, 10 parts of microencapsulated red phosphorus, 95 parts of halogen-free Composite flame retardant (including 40 parts of nano calcium carbonate, 40 parts of magnesium hydroxide, 15 parts of melamine cyanurate (MCA)), 1.5 parts of zinc stearate, 2.5 parts of epoxidized soybean oil, 1.5 parts of trimethylol Propane trimethacrylate (TMPTMA), 3 parts composite antioxidant (including 2 parts antioxidant 1010 (tetra[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol ester ), 1 part of antioxidant 168 (tris(2,4-di-tert-butylphenyl) phosphite)) were successively put into the double-roller internal mixer and mixed for 5-10 minutes, and then the above mixture was forced-fed Finally, the twin-screw...

Embodiment 2

[0040] Mix 25 parts of linear low density polyethylene (LLDPE), 30 parts of ethylene-octene block copolymer (melt index 0.5 g / 10min, density 0.869 g / cm3), 38 parts of acrylate rubber (Mooney viscosity is 29ML (1 +4)@100℃), 7 parts of ethylene-acrylate-maleic anhydride terpolymer, 8 parts of microencapsulated red phosphorus, 100 parts of halogen-free composite flame retardant (including 30 parts of nano calcium carbonate, 50 parts of hydrogen Aluminum oxide, 20 parts melamine cyanurate (MCA)), 1.5 parts zinc stearate, 3 parts dioctyl terephthalate (DOTP), 1.5 parts trimethylolpropane trimethacrylate (TMPTMA) , 2.5 parts of composite antioxidant (including 1.5 parts of antioxidant 1076 (3-(3,5 di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate), 1 part of antioxidant 626 ( Bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite)) put into the double-roller internal mixer and knead for 5-10 minutes, and then the above mixture is fed by a twin-screw extruder Extrude, draw, w...

Embodiment 3

[0044]Mix 40 parts of high-density polyethylene (HDPE), 30 parts of ethylene-octene block copolymer (melt index 5 g / 10min, density 0.887 g / cm 3 ), 25 parts of acrylate rubber (Mooney viscosity is 18.5ML (1+4)@100℃), 5 parts of ethylene-acrylate-maleic anhydride terpolymer, 12 parts of microencapsulated red phosphorus, 87 parts of Halogen composite flame retardant (including 40 parts of nano-calcium carbonate, 30 parts of aluminum hydroxide, 17 parts of melamine cyanurate (MCA)), 1.5 parts of N'N-ethylene bisstearamide (EBS), 3 parts of Dioctyl phthalate (DOTP), 2 parts of trimethylolpropane trimethacrylate (TAIC), 3 parts of compound antioxidant (including 1.5 parts of antioxidant 1076 (3-(3,5 di-tert-butyl Base-4-hydroxyphenyl) n-octadecyl propionate), 1.5 parts of antioxidant DSTP (distearyl thiodipropionate)) were put into the double-roller internal mixer and mixed for 5~10 Minutes, then the above mixture is forced fed and then extruded with a twin-screw extruder in the te...

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Abstract

The invention discloses a material formula of a hot tear resisting type heat-shrinkable busbar protecting sleeve and a production method thereof. The material formula comprises the following components in parts by weight: 20-50 parts of polyethylene, 30-80 parts of ethylene-octylene segmented copolymer, 10-35 parts of acrylic rubber, 3-10 parts of ethylene-acrylic ester-maleic anhydride terpolymer, 5-15 parts of microencapsulated red phosphorus, 60-110 parts of a halogen-free composite flame retardant, 0.5-2 parts of a lubricating agent, 1.5-4.5 parts of a plasticizer, 1-2.5 parts of a sensitized crosslinking agent, and 1.5-3.5 parts of a complex antioxidant. The hot tear resisting type heat-shrinkable busbar protecting sleeve is outstanding in hot tear resisting capacity; the temperatureincrease test is carried out for 8h with the current of 3150A under the condition that a 10mm opening is formed in the end part; the temperature is increased to be not less than 120 DEG C; when the actual surface temperature is 150 DEG C or higher, a copper bar cannot crack, and the cracked opening is not lengthened.

Description

technical field [0001] The invention relates to the technical field of heat-shrinkable tube materials, in particular to a high-temperature tear-resistant heat-shrinkable busbar protection sleeve and a production method thereof. Background technique [0002] Heat-shrinkable busbar protection sleeve is mainly used for insulation protection of substation busbar and high-voltage and low-voltage switchgear busbars, which can make the structure of the switchgear compact (shorten the distance between phases) and prevent occasional short-circuit accidents. During the working period of the switchgear, especially during the peak period of power consumption, the actual temperature rise of the surface temperature of the copper bar can reach 150°C through the actual measurement of the thermocouple. Therefore, the heat-shrinkable busbar protective sleeve is used at this temperature for a long time, especially When there are knife edges or burrs left during cutting at the end, cracking is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L23/08C08L33/04C08L91/00C08K13/06C08K9/10C08K3/26C08K3/22C08K5/3492C08K5/098C08K5/103C08K5/134C08K5/526
CPCC08K2003/2224C08K2003/265C08L53/00C08L2201/02C08L2203/18C08L2205/02C08L2205/035C08L23/0815C08L33/04C08L23/0869C08L91/00C08K13/06C08K9/10C08K3/26C08K3/22C08K5/3492C08K5/098C08K5/103C08K5/1345C08K5/526
Inventor 魏立东王宇源何立乾冯雪雁康树峰
Owner SHENZHEN WOER HEAT SHRINKABLE MATERIAL
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