CN101812214B - Electromagnetic shielding material and preparation method thereof - Google Patents
Electromagnetic shielding material and preparation method thereof Download PDFInfo
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- CN101812214B CN101812214B CN2009101765071A CN200910176507A CN101812214B CN 101812214 B CN101812214 B CN 101812214B CN 2009101765071 A CN2009101765071 A CN 2009101765071A CN 200910176507 A CN200910176507 A CN 200910176507A CN 101812214 B CN101812214 B CN 101812214B
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- 239000000463 material Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 30
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 239000006247 magnetic powder Substances 0.000 claims abstract 5
- 239000004014 plasticizer Substances 0.000 claims abstract 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 14
- 239000004917 carbon fiber Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 239000000843 powder Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000002270 dispersing agent Substances 0.000 claims description 9
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 claims description 6
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000005855 radiation Effects 0.000 abstract description 3
- 238000004891 communication Methods 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000007781 pre-processing Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 21
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 description 13
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 description 13
- 239000004902 Softening Agent Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005670 electromagnetic radiation Effects 0.000 description 4
- 238000005469 granulation Methods 0.000 description 4
- 230000003179 granulation Effects 0.000 description 4
- 230000005291 magnetic effect Effects 0.000 description 4
- 238000002203 pretreatment Methods 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 239000006229 carbon black Substances 0.000 description 3
- 235000019241 carbon black Nutrition 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003979 granulating agent Substances 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 238000012857 repacking Methods 0.000 description 2
- 241000872198 Serjania polyphylla Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to a chemical material, in particular to an electromagnetic shielding material and a preparation method thereof. The preparation method of the electromagnetic shielding material comprises the following steps of: after mixing, heating and preprocessing ABS plastics and an ABS plasticizer, adding conductive carbon black, magnetic powder and carbon fibre, mixing evenly by a high mixing machine, then delivering into a twin-screw extruder, extruding and granulating so as to prepare the electromagnetic shielding material; and the invention has favorable effect of preventing the radiation of electromagnetic waves and can be applied to the fields of electric power, wireless communication, household appliances and military affairs. The invention has extensive application, simple process and low manufacturing cost and can be recycled.
Description
Technical field
The present invention relates to a kind of chemical materials, particularly relate to a kind of electromagnetic shielding material and preparation method thereof.
Background technology
Along with growth in the living standard, increasing electric equipment products enter family.These electrical equipment more or less all can produce electromagnetic radiation, surpass the above electromagnetic radiation meeting of 2 milligauss and cause people's disease that takes a disease, heat effect, no heat effect and accumulative total effect have caused the crowd of modern sub-health state more and more to the compound injury of human body, and the radiation pollution of household electrical appliance should obtain people and more and more pay attention to.The electromagnetic shielding material that uses is both at home and abroad mostly made as raw material with metallic substance at present.Its objective is for the electromagnetic radiation that decays, but its facility investment is big, complex process, product price are too high.
Summary of the invention
Purpose of the present invention overcomes the deficiencies in the prior art exactly, and a kind of electromagnetic shielding material is provided.This electromagnetic shielding material can not only effectively absorb and the electromagnetic radiation that decays, and cost low, be beneficial to environmental protection and technology is simple, be fit to promote the use of.
An object of the present invention is to provide a kind of electromagnetic shielding material.
Another object of the present invention provides the preparation method of described electromagnetic shielding material.
The objective of the invention is to be achieved through the following technical solutions:
A kind of electromagnetic shielding material, it is formed by the feedstock production that comprises following parts by weight;
ABS plastic 30-35 conductive carbon black 20-25
ABS softening agent 20-23 magnetic 16-20
Carbon fiber 3-5
Described magnetic is a kind of or its two mixture in iron nickel powder, the nickel zinc powder.
ABS plastic, chemical name: acrylonitrile-butadiene-styrene copolymer, its over-all properties is better, and shock strength is higher, chemical stability, electrical property is good;
Conductive carbon black: carbon black with low resistance or high resistance performance.Can give goods conduction or anti-static electrification.Its characteristics are that particle diameter is little, and specific surface area is big and coarse, structure height, surface cleaning (compound is few) etc.;
ABS softening agent: be the ABS of Du Pont softening agent, in order to improve the consistency of ABS to carbon black.
Carbon fiber: be the chopped carbon fiber toughener, can improve mechanical performance of products.Preferably, a kind of electromagnetic shielding material, it is formed by the feedstock production that comprises following parts by weight;
ABS plastic 35 conductive carbon blacks 25
Carbon fiber 5
The preparation method of a kind of electromagnetic shielding material of the present invention, it may further comprise the steps;
(1) take by weighing each raw material by formula ratio, carry out pre-treatment after at first ABS plastic and ABS softening agent being mixed, temperature 75-85 ℃, time 4h.
(2) liquid dispersant is added step (1) through in the pretreated raw material, the preliminary back of mixing adds conductive carbon black, magnetic and carbon fiber, and wherein the weight ratio of conductive carbon black and liquid dispersant is 1000: 3-5; Mix through high mixer, enter into twin-screw extruder again and extrude for inherent 230 ℃,, make electromagnetic shielding material of the present invention through the tablets press granulation.
The liquid dispersant of mentioning in the above-mentioned steps (2) claims white oil again: it is through the mineral oil behind the special deep refining, mixture for the liquid type hydro carbons, main component is the mixture of the positive isoparaffin of C16～C31, be after processing such as dewaxing, carbonization, neutralization, atlapulgite be refining, to form in the high-boiling fraction (being lubricating oil distillate) from petroleum fractionating, white oil is colourless, tasteless, unreactiveness, light stability can be good, basic composition is saturated hydrocarbon structure, materials such as aromatic hydrocarbon, nitrogenous, oxygen, sulphur are similar to zero; Adding liquid dispersant in this step, is to produce dust in preparation process, contaminate environment after adding conductive carbon black.
A kind of electromagnetic shielding material of the present invention through big quantity research and experiment, selects for use specific raw material and proportioning to be prepared from; It has good anti-electromagnetic radiation effect, can be applied in electric power, cableless communication, household electrical appliance and the military field.It is of many uses, and technology is simple, and cost is low, can recycle.
Description of drawings
Test data figure when Fig. 1 is PT42618NHD (P06) the complete machine repacking embodiment of the invention 1 back screening cover;
Test data figure when Fig. 2 is PT42618NHD (P06) complete machine first wife iron bonnet;
Fig. 3 is the test data figure of PT42618NHD (P06) complete machine when not covering bonnet;
Fig. 4 is an electromagnetic shielding material geomery synoptic diagram of the present invention;
Fig. 5 is electromagnetic shielding material effectiveness of shielding trial curve figure of the present invention;
Fig. 6 is the coaxial test set synoptic diagram of flange of the present invention.
1, losser, 2, losser, 3, tested sample.
Embodiment
Below adopt embodiment to specify a kind of electromagnetic shielding material of the present invention and preparation method thereof.
Embodiment 1
ABS plastic 70kg conductive carbon black 50kg
ABS softening agent 40kg iron nickel powder 40kg
Carbon fiber 10kg
Its preparation method is as follows:
(1) takes by weighing each raw material by formula ratio, carry out pre-treatment, 80 ℃ of temperature, time 4h after at first ABS plastic and ABS softening agent being mixed;
(2) the 200g liquid dispersant is joined step 1 through in the pretreated raw material, the preliminary back of mixing adds conductive carbon black, iron nickel powder and carbon fiber.After high mixer mixes, enter into twin-screw extruder again and extrude for inherent 230 ℃, through the granulating agent granulation, make electromagnetic shielding material of the present invention.
Embodiment 2
ABS plastic 32kg conductive carbon black 20kg
ABS softening agent 20kg nickel zinc powder 16kg
Carbon fiber 3kg
Its preparation method is as follows:
(1) takes by weighing each raw material by formula ratio, carry out pre-treatment, 85 ℃ of temperature, time 4h after at first ABS plastic and ABS softening agent being mixed;
(2) the 75g liquid dispersant is joined step 1 through in the pretreated raw material, the preliminary back of mixing adds conductive carbon black, nickel zinc powder and carbon fiber.After high mixer mixes, enter into twin-screw extruder again and extrude for inherent 230 ℃, through the granulating agent granulation, make electromagnetic shielding material of the present invention.
Embodiment 3
ABS plastic 70kg conductive carbon black 45kg
ABS softening agent 42kg iron nickel powder and nickel zinc powder mixture 36kg
Carbon fiber 9kg
Its preparation method is as follows:
(1) takes by weighing each raw material by formula ratio, carry out pre-treatment, 85 ℃ of temperature, time 4h after at first ABS plastic and ABS softening agent being mixed;
(2) the 110g liquid dispersant is joined step 1 through in the pretreated raw material, the preliminary back of mixing adds conductive carbon black, iron nickel powder and nickel zinc powder mixture, carbon fiber; After high mixer mixes, enter into twin-screw extruder again and extrude for inherent 230 ℃, through the granulating agent granulation, make electromagnetic shielding material of the present invention.
Below effect by the simultaneous test explanation embodiment of the invention 1 electromagnetic shielding material.
Test sample: 1, PT42618NHD (P06) complete machine is reequiped the bonnet that the embodiment of the invention 1 electromagnetic shielding material is made; 2, PT42618NHD (P06) complete machine first wife iron bonnet; 3, PT42618NHD (P06) complete machine does not cover bonnet.
Annotate: PT42618NHD (P06) is the model of PDP (plasm TV)
Detect data: the radiation field intensity data
1, PT42618NHD (P06) the complete machine repacking embodiment of the invention 1 electromagnetic shielding material make bonnet the time the test data (see figure 1)
QP：
Gap?Frequency Level Transd Limit Margin Height Azimuth Polarisation
MHz dBμV/m dB dBμV/m dB cm deg
* 44.500000 27.50 10.2 40.0 12.5 229.0 70.00 HORIZONTAL
73.500000 32.90 7.9 40.0 7.1 229.0 185.00 HORIZONTAL
75.625000 33.00 8.0 40.0 7.0 220.0 149.00 HORIZONTAL
80.250000 35.90 8.4 40.0 4.1 224.0 177.00 HORIZONTAL
2, the test data (see figure 2) during PT42618NHD (P06) complete machine first wife iron bonnet
QP：
Gap?Frequency Level Transd Limit Margin Height?Azimuth?Polarisation
MHz dBμV/m dB dBμV/m dB cm deg
* 30.750000 36.20 17.8 40.0 3.8 229.0 330.00 HORIZONTAL
31.125000 37.30 17.6 40.0 2.7 224.0 29.00 HORIZONTAL
31.312500 37.20 17.5 40.0 2.8 229.0 29.00 HORIZONTAL
31.562500 36.40 17.3 40.0 3.6 229.0 1.00 HORIZONTAL
Test data (see figure 3) when 3, PT42618NHD (P06) complete machine does not cover bonnet
QP：
Gap?Frequency Level Transd Limit Margin Height Azimuth?Polarisation
MHz dBμV/m dB dBμV/m dB cm deg
* 67.687500 46.10 7.8 40.0 -6.1 229.0 297.00 HORIZONTAL
110.250000 42.00 13.6 40.0 -2.0 154.0 0.00 HORIZONTAL
138.750000 43.40 13.3 40.0 -3.4 133.0 359.00 HORIZONTAL
155.125000 39.90 12.2 40.0 0.1 127.0 359.00 HORIZONTAL
Above simultaneous test explanation: adopt the PDP television rear cover of electromagnetic shielding material preparation of the present invention can satisfy of the requirement of PDP televisor to shielding character.
(electromagnetic compatibility) examining report of electromagnetic shielding material of the present invention
Sample: the sheet material that electromagnetic shielding material of the present invention is made
Test basis
The measuring method of SJ20524-95 material effectiveness of shielding
The test frequency range
Frequency range I:9kHz-30MHz;
Frequency range II:30MHz-1500MHz;
When measuring, should be at least at 30MHz, 50MHz, 100MHz, 300MHz, 1GHz, 1.5GHz equifrequent point provides measuring result.
Effectiveness of shielding (SE)
Under the same level of drive, the received power or the ratio of voltage when shielding material is arranged with unshielded material, and represent with logarithm.That is:
In the formula: SE-effectiveness of shielding, dB;
V
0Reception voltage during-unshielded material;
V
1-reception voltage when shielding material is arranged;
P
0Received power during-unshielded material;
P
1-received power when shielding material is arranged.
The requirement of specimen shape and size
A: load sample maximum ga(u)ge t≤5mm
(see figure 4)
A1. the load sample that can be used for 5kHz～1.5GHz effectiveness of shielding test. but remain further to be studied for the comparability of 5kHz～15GHz and ASTM double shield box method.
A2. the load sample that is used for 30MHz～1.5GHz effectiveness of shielding test
A3. the reference coupon that is used for 30MHz～1.5GHz calibration;
Fig. 1 specimen shape size synoptic diagram
The Discrepancy Description of customer requirement and standard method
Do not have
The 4th part test result
The test equipment used
| Sequence number | Device name | Model | Manufacturer | Calibrate expiration date |
| 1? | The coaxial test set of flange | /? | Southeast China university | /? |
| ?2? | The EMI measuring receiver | ESCS30? | Germany R﹠S company | 2010.05.07? |
Electromagnetic shielding material effectiveness of shielding test arrangement synoptic diagram (see figure 6) of the present invention
Testing data
The trial curve (see figure 5)
Crucial frequency point data
| Test frequency (MHz) | Effectiveness of shielding SE (dB) |
| 30? | 17.5? |
| 50? | 17.3? |
| 100? | 17.8? |
| 300? | 18.7? |
| 500? | 18.1? |
| 1000? | 21.8? |
The range of frequency of this test is 30MHz～1000MHz
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101765071A CN101812214B (en) | 2009-09-21 | 2009-09-21 | Electromagnetic shielding material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101765071A CN101812214B (en) | 2009-09-21 | 2009-09-21 | Electromagnetic shielding material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN101812214A CN101812214A (en) | 2010-08-25 |
| CN101812214B true CN101812214B (en) | 2010-12-15 |
Family
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103238382A (en) * | 2010-10-06 | 2013-08-07 | 因特瓦产品有限责任公司 | Method and apparatus for providing reinforced composite materials with electromagnetic interference shielding |
| CN102093738B (en) * | 2010-12-08 | 2013-01-02 | 兴乐集团宁夏电缆有限公司 | High-performance carbon fiber reinforced coating material and optical cable adopting same |
| CN102558749B (en) * | 2012-01-04 | 2015-02-25 | 黑龙江大学 | Acrylonitrile butadiene-stvrene (ABS) resin/ conductive carbon black/ pitch-based carbon fiber conductive composite material and preparation method thereof |
| CN103804844A (en) * | 2013-12-03 | 2014-05-21 | 宁波康氏塑料科技有限公司 | Electromagnetic shielding plastic and preparation method thereof |
| CN104530579A (en) * | 2014-12-23 | 2015-04-22 | 苏州贤聚科技有限公司 | Light diffusion master batch and preparation method thereof |
| CN105153628B (en) * | 2015-08-03 | 2018-09-25 | 南京泰宇材料科技有限公司 | A kind of conduction ABS material and preparation method thereof |
| CN105968687A (en) * | 2016-05-25 | 2016-09-28 | 张小雨 | Electromagnetic shielding plastic and manufacturing technique thereof |
| CN106189043A (en) * | 2016-07-07 | 2016-12-07 | 安徽国风木塑科技有限公司 | A kind of wood moulds electromagnetic shielding plate and processing method |
| WO2018119617A1 (en) * | 2016-12-27 | 2018-07-05 | 辛范范 | Shielding material for electric appliance |
Citations (5)
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|---|---|---|---|---|
| US5004561A (en) * | 1986-03-31 | 1991-04-02 | Mitsubishi Gas Chemical Company, Inc. | Electromagnetic wave-shielding thermoplastic resin composition |
| CN1204230A (en) * | 1997-12-08 | 1999-01-06 | 李建安 | A protective cover for a mobile phone and its manufacturing method |
| CN1772798A (en) * | 2005-08-03 | 2006-05-17 | 北京纳盛通新材料科技有限公司 | Conductive plastic and its processing method and apparatus |
| CN1883013A (en) * | 2003-10-16 | 2006-12-20 | 韩国电子通信研究院 | Electromagnetic shielding material having carbon nanotube and metal as electrical conductor |
| CN101160039A (en) * | 2007-10-30 | 2008-04-09 | 中兴通讯股份有限公司 | Plastic shielding cover board |
-
2009
- 2009-09-21 CN CN2009101765071A patent/CN101812214B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5004561A (en) * | 1986-03-31 | 1991-04-02 | Mitsubishi Gas Chemical Company, Inc. | Electromagnetic wave-shielding thermoplastic resin composition |
| CN1204230A (en) * | 1997-12-08 | 1999-01-06 | 李建安 | A protective cover for a mobile phone and its manufacturing method |
| CN1883013A (en) * | 2003-10-16 | 2006-12-20 | 韩国电子通信研究院 | Electromagnetic shielding material having carbon nanotube and metal as electrical conductor |
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Non-Patent Citations (1)
| Title |
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| CN101812214A (en) | 2010-08-25 |
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