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Electricity meter casing and preparation method thereof

A technology for shells and electric meters, which is applied in the direction of measuring electrical variables, instruments, and measuring devices. It can solve the problems of insufficient mechanical strength of polymer materials, reduce corporate profit margins, and insufficient strength, and achieve excellent thermal stability and flame retardancy. performance, promote industrial production, and reduce the cost of raw materials

Inactive Publication Date: 2014-03-26
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polycarbonate is a colorless, transparent, amorphous thermoplastic material. Its chemical properties are resistance to weak acids, weak bases, neutral oils, ultraviolet light and strong bases. Its physical properties are linear expansion rate: 38 ×10cm / cm 2 , thermal deformation temperature 135 ℃, has the disadvantages of poor stability, easy cracking due to stress, low impact resistance to notch, poor wear resistance, low adhesion to metal parts, high viscosity, poor fluidity and affecting processing and injection molding, etc.
[0003] At present, more studies at home and abroad are polycarbonate modified electric meter housing materials, the main component of which is polycarbonate, and other flame-retardant materials are added, which often have defects of insufficient strength or poor thermal stability. It cannot be both; and the cost of using polycarbonate in large quantities is high, which reduces the profit margin of the enterprise
Chinese invention patent CN101469118A discloses a kind of polymer material for electric watch case, the mechanical strength of this polymer material is not enough, and the cost is high, do not utilize and promote the use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A kind of ammeter case, it is prepared by the raw material of following weight part:

[0015] Polyvinyl alcohol 100, polyvinyl chloride 80, starch ether 60, glass fiber 45, hydroxyethyl cellulose 35, polycarbonate 30, polylactic acid 25, decabromodiphenylethane 20, polydimethylsiloxane 18 , chitin 12, silicon nitride powder 10, silica gel 7, sodium succinate 4, talcum powder 2, barium sulfate 2;

[0016] The length of glass fiber is 1mm; the pore volume of silica gel is 0.6-0.7ml / g, the average pore diameter is 5.0-6.5nm, and the specific surface is 500-600m 2 / g; the particle size of silicon nitride powder, talcum powder and barium sulfate is controlled at 600 mesh.

[0017] The preparation method of the above electric meter housing includes the following steps: weighing the above-mentioned raw materials according to the weight part, adding each raw material to the centrifuge in turn, and centrifuging at 1000 rpm for 3 minutes, after mixing evenly, entering the twin-s...

Embodiment 2

[0019] A kind of ammeter case, it is prepared by the raw material of following weight part:

[0020] Polyvinyl alcohol 110, polyvinyl chloride 90, starch ether 70, glass fiber 50, hydroxyethyl cellulose 40, polycarbonate 36, polylactic acid 28, decabromodiphenylethane 22, polydimethylsiloxane 20 , chitin 15, silicon nitride powder 13, silica gel 8, sodium succinate 5, talcum powder 4, barium sulfate 3;

[0021] The length of glass fiber is 5mm; the pore volume of silica gel is 0.6-0.8ml / g, the average pore diameter is 4.5-7.0nm, and the specific surface is 450-650m 2 / g; the particle size of silicon nitride powder, talcum powder and barium sulfate is controlled at 800 mesh.

[0022] The preparation method of the above electric meter housing includes the following steps: weighing the above-mentioned raw materials according to the weight part, adding each raw material to the centrifuge in turn, and centrifuging at 1000 rpm for 3 minutes, after mixing evenly, entering the twin-s...

Embodiment 3

[0024] The performance test of the electric meter housing material prepared by the present invention:

[0025] Carry out performance test for the ammeter casing prepared by the embodiment of the present invention 1 and 2; Among them mold shrinkage is tested according to ASTM D955; Bending strength is tested according to ASTM D790; Tensile strength is tested according to ASTM D638; Notched impact strength is tested according to ASTM D256; The temperature is tested according to ASTM D648. The test results of the obtained materials are shown in Table 1:

[0026] Table 1 Performance test of the electric meter housing material prepared by the present invention

[0027] performance parameters

[0028] Conclusion: the electric meter housing prepared by the present invention has better synergy between the raw material components, better mechanical properties, and excellent thermal stability and flame retardancy (flame retardancy UL94 is V0 level); the present invention The...

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Abstract

The invention belongs to the field of electronic materials, and discloses an electricity meter casing which is prepared by 100-110 parts of polyvinyl alcohol, 80-90 parts of polyvinyl chloride, 60-70 parts of starch ether, 45-50 parts of glass fiber, 35-40 parts of hydroxyethyl cellulose, 30-36 parts of polycarbonate, 25-28 parts of polylactic acid, 20-22 parts of decabromodiphenylethane, 18-20 parts of polydimethylsiloxane, 12-15 parts of chitin, 10-13 parts of silicon nitride powder, 78 parts of silica gel, 4-5 parts of sodium succinate, 2-4 parts of talcum powder and 2-3 parts of barium sulfate. The invention further discloses a preparation method of the electricity meter casing. The prepared electricity meter casing has better mechanical performance and excellent heat stability and flame retardant property.

Description

technical field [0001] The invention belongs to the field of electronic materials, and specifically discloses an electric meter casing and a preparation method thereof. Background technique [0002] The electric meter is the abbreviation of the electric energy meter. It is an instrument used to measure electric energy, also known as the electric meter, the fire meter, the electric energy meter, and the kilowatt-hour meter. The ammeter case mainly plays the role of protecting the internal parts of the ammeter, which requires good mechanical properties, good thermal stability and flame retardancy. At present, the housing materials of electric meters in China mostly use flame-retardant ABS. Although flame retardant ABS is cheap, its rigidity is not very good. Reinforced polycarbonate (PC) is mostly used abroad at present. With the development of my country's economy, a large number of reinforced PCs will be used as the housing material of electric meters in China. Polycarbon...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L27/06C08L3/08C08L1/26C08L69/00C08L67/04C08L83/04C08L5/08C08K13/04C08K7/14C08K5/03C08K3/34C08K5/098C08K3/30B29C45/76G01R11/04
Inventor 李彪何健化晨冰杨博于旭光申永成公绪波
Owner STATE GRID CORP OF CHINA
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