CN1727401A - Nano plastic of adsorbing wave, and method for producing products made from the material - Google Patents
Nano plastic of adsorbing wave, and method for producing products made from the material Download PDFInfo
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- CN1727401A CN1727401A CN 200510043010 CN200510043010A CN1727401A CN 1727401 A CN1727401 A CN 1727401A CN 200510043010 CN200510043010 CN 200510043010 CN 200510043010 A CN200510043010 A CN 200510043010A CN 1727401 A CN1727401 A CN 1727401A
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Abstract
An electromagnetic wave absorbing nano-class plastic product is prepared from the plastic mother particles including ABS, POM, PE, PA, PC, PMMA, PS and PVA and the nano material including beta-silicon carbide nanoparticles, Ni nanoparticles and polyphenylamine through mixing said plastic mother particles, ultrasonic-mixing and granulating said nano material, mixing them together, drying, and injection (or blow) moulding. Its advantages are wide bandwidth, high absorptivity and no secondary pollution.
Description
Technical field
The invention discloses a kind of plastic material, particularly the preparation method of nano wave-absorption composite plastics material and products thereof.
Background technology
21 century is the information age, is that novel material and advanced manufacturing technology develop the epoch with widespread use rapidly, also is that people pursue efficiently, the epoch of cleaning and safe utilization new forms of energy, development of science and technology, and continuing to bring out of new technology will cause new Industrial Revolution.Developing country has dropped into great amount of manpower, financial resources to Materials science in succession, particularly all material therefor is had higher requirement in fields such as space flight, aviation, traffic, buildings, wherein the demand to the high-tech material grows with each passing day, plastics are one of current three big materials, are widely used.
Stealthy technique extensively model is applied in the weapons system of developed country, and is listed in the fundamental of " competitive strategy " as new and high technology primary in the military field.When research and improving traditional plastic of adsorbing wave, carried out fruitful novel material research abroad.China has obtained certain progress having dropped into very big financial resources and manpower aspect the stealth material research, but very big with the technological gap of developed countries.The U.S. drops into 1,900,000,000 dollars and carries out stealthy technique research institute, and 20,000,000,000 dollars equip our troops, and Taiwan is dropped into 1,000,000,000 yuan and equipped our troops, Britain, Japan, France etc. all the contention this technology the commanding elevation.
The research development abroad of absorbing material is very fast, and from 70～eighties of 20th century, countries such as the U.S., USSR (Union of Soviet Socialist Republics) have dropped into a large amount of energy and have been engaged in the research, and has obtained remarkable achievement.Since the nineties, developed country also with its technology as the new technology of first developing in the competitive strategy.
Protecting fast the increasing of field demand at hertzian wave.Hertzian wave has been listed in the fourth-largest pollution after atmospheric pollution, water pollution, the noise pollution.Secant on May 7th, 1999 all circles of China State Environmental Protection Administration: electromagenetic wave radiation is harmful to body (human body), and state's label is GB8702-88, has included electromagnetic radiation in environmental protection legal management track.Country has clearly stipulated occupational exposure derivation limit value to electromagnetic radiation protection, and the power density of electromagnetic radiation can not surpass 20 μ W/cm
2In living environment, the power density of electromagnetic radiation can not surpass 40 μ W/cm
2
Developed countries such as the U.S., Britain, Japan, Canada, Sweden, Germany, France, Korea S since three, the forties just carries out the research of special type protection fabric; arrived the eighties, U.S. North American Aviation Incorporation develops to protecting biological strength to prevent the found vest of radar detection and the helmet.To the nineties initial stage, developed country is the radiation hazradial bundle that prevents household electrical appliance, such as microwave oven, electromagnetic stove, computer, electric blanket, suction cleaner etc. to human body particularly to pregnant woman and children's influence, started that " housewife " wears the shielding apron, shielding unlined long gown and teenager wears the shielding vest, the upsurge of shielding western-style clothes.To middle nineteen nineties, Japan takes the lead in succeeding in developing metallization material, carrying out sulfide on the common material basis handles, domestic mainly in the majority with the plated film loomage, with nickel system, copper is that the shielding plastic brushing forms screen layer on textiles, such protective material poor adhesive force, and ventilation property is poor, wash resistant not, quality is harder.Shield effectiveness is mainly to be reflected into the master.Domestic electromagnetic shielding material is mainly copper wire gauze, plastics, carbon fiber, metallic substance etc., and military shielded cell needs with the thick steel plate manufacturing that reaches about 3 centimeters, and the shielding properties of these electromagnetic shielding materials is mainly to be reflected into the master, absorb less, poor-performing causes defectives such as secondary electromagnetic pollution
Summary of the invention
Goal of the invention of the present invention provides and a kind ofly shields that wavelength band is wide, electromagnetic wave absorptivity is high, reflectivity is low, do not produce a kind of nano plastic of adsorbing wave material of secondary pollution.
Another goal of the invention of the present invention provides a kind of preparation method of product.
The technical scheme that realizes goal of the invention is to solve like this: a kind of nano plastic of adsorbing wave material, be made up of plastic master batch and nano material, its outstanding characteristics are that said plastic master batch comprises acrylonitrile-butadiene-phenylethylene copolymer A BS, polyoxymethylene POM, polythene PE, polymeric amide PA, polycarbonate, polymethyl methacrylate PMMA, polystyrene PS, polyvinylchloride, politef PTFE, vibrin; Said nano material comprises nanometer β-carborundum, nano-nickel powder, polyaniline; Wherein the nano plastic of adsorbing wave material contains 58%～83% plastic matrix, 8～33% nanometer β-carborundum, 1～6% nano-nickel powder, 8～22% polyaniline.
A kind of preparation method who realizes the nano plastic of adsorbing wave material product, undertaken by following step successively:
A. plastic master batch is taken by weighing by weight percentage required weight pour into stir in the blender stand-by;
B. make the nanometer master batch: nanometer β-carborundum, nano-nickel powder, liquid polyaniline are taken by weighing required weight by weight percentage and pour in another blender, and ultra-sonic oscillation are even, and oven dry is granulated stand-by;
C takes by weighing required weight by weight percentage with the nanometer master batch that makes and plastic master batch and pours in the blender and stir, and its mixed weight ratio is: nanometer master batch: plastic master batch=1～2.8: 1.3～5.6;
D. removal moisture drying;
E, technical process
1., nanometer master batch+plastic master batch batch mixing;
2., 60 ℃～65 ℃ removal moisture drying;
3., stir and add feed box;
4., in injection moulding machine, heat up, its intensification temperature is: 60 ℃-200 ℃;
5., pressure regulation in injection moulding machine, its pressure is 40-140MPa;
6., injection moulding or blowing;
7., absorbing material finished product.
Material requirements:
1., nanometer β-carborundum, nano-nickel powder particle diameter be d＜100nm, its purity 〉=99%;
2., plastic master batch: comprise ABS, POM, PE, PA, PC, PMMA, PS, PVA; Choose different plastic master batches according to different purposes, above-mentioned different kind can be wherein independent a kind of plastic master batch, also can be two or more compound making.
The present invention compared with prior art, major part is absorbed obstruct when utilizing big specific surface effect of nanoparticle and electron tunneling effect to make hertzian wave by plastics, thereby reach the effect that makes the electromagnetism wave height absorb low reflection, can make various broadbands high-performance wave-absorbing shielding product.This product have the shielding wavelength band wide, electromagnetic wave absorptivity is high, reflectivity is low, do not produce secondary pollution, it is good absorbing material, the research and development of nano wave-absorption composite plastic, to start frontiers such as stealthy and environment-friendly materials, greatly improve people's work and living environment, preventing disease, create the green consumption space, be widely used in national defense industry, military affairs, space flight, building or inhabitation, be operated in substation, resident and staff near the broadcasting station, television station, wireless radar station, hi-line, hertzian wave launching tower; The patient who is furnished with schrittmacher; Often use the personnel of electronic equipment, medical facilities, modern office equipment; Often use the housewife of microwave oven; Fields such as pregnant woman in the modern office Working environment, the research and development success of this product has important social and economic benefit.
Technical indicator
1. shield ranges 400MHZ～20GHZ
2. scattering parameter: S
110.3～0.7
S
22?0.2～0.9
S
12?0.6～0.8
3. power reflectance R
P0.03～0.95-15.23dB～-0.22dB
4. power transmittance T
P0.3～0.8-5.23dB～-0.97dB
5. power absorption rate A
P0.08～0.50-10.97dB～-3.01dB
Electromagnetic attenuation-26.2dB～-3.23dB
Description of drawings
Fig. 1 is a process flow sheet of the present invention;
Fig. 2 is a microwave attenuation schematic diagram of the present invention.
Embodiment
Accompanying drawing is embodiments of the invention.
Below content of the present invention is described further:
With reference to shown in Figure 1, a kind of nano plastic of adsorbing wave material is made up of plastic master batch and nano material, its said plastic master batch comprises acrylonitrile-butadiene-phenylethylene copolymer A BS, polyoxymethylene POM, polythene PE, polymeric amide PA, polycarbonate, polymethyl methacrylate PMMA, polystyrene PS, polyvinylchloride, politef PTFE, vibrin; Said nano material comprises nanometer β-carborundum, nano-nickel powder, polyaniline; Wherein the nano plastic of adsorbing wave material contains 58%～83% plastic matrix, 8～33% nanometer β-carborundum, 1～6% nano-nickel powder, 8～22% polyaniline.
A kind of preparation method who realizes the nano plastic of adsorbing wave material product, undertaken by following step successively:
A. plastic master batch is taken by weighing by weight percentage required weight pour into stir in the blender stand-by;
B. make the nanometer master batch: nanometer β-carborundum, nano-nickel powder, liquid polyaniline are taken by weighing required weight by weight percentage and pour in another blender, and ultra-sonic oscillation are even, and oven dry is granulated stand-by;
C takes by weighing required weight by weight percentage with the nanometer master batch that makes and plastic master batch and pours in the blender and stir, and its mixed weight ratio is: nanometer master batch: plastic master batch=1～2.8: 1.3～5.6;
D. removal moisture drying;
E, technical process
1., nanometer master batch+plastic master batch batch mixing;
2., 60 ℃～65 ℃ removal moisture drying;
3., stir and add feed box;
4., in injection moulding machine, heat up, its intensification temperature is: 60 ℃-200 ℃;
5., pressure regulation in injection moulding machine, its pressure is 40-140MPa;
6., injection moulding or blowing;
7., absorbing material finished product.
Material requirements
1., nanometer β-carborundum, nano-nickel powder particle diameter be d＜100nm, its purity 〉=99%; Because the particle diameter difference, specific surface area, to expose unbound electron widely different, very big to the absorbing property influence, thereby be the key of plastic of adsorbing wave;
2., master batch: comprise ABS, POM, PE, PA, PC, PMMA, PS, PVA chooses different plastic master batches according to different purposes, above-mentioned different kind can be wherein independent a kind of plastic master batch, also can be two or more compound making.
Shown in Figure 2, when adopting the ABS master batch, add the plastic plate that nanometer β-carborundum, nano-nickel powder grain and polyaniline are prepared into, when the hertzian wave of electromagnetic wave emission source emission is transferred to frosting, a part is reflected, and reflection angle is 175.5 °, and a part is absorbed and is converted into other energy, a part penetrates plastics, and it is 34.8 ° that hertzian wave penetrates angle.Plastics have shielding properties, its shielding properties and ε (specific inductivity); ρ (resistivity); F (frequency Hz); μ (magnetic conduction relatively); α/γ (γ is particle radii, and α is an atomic radius) is closely related; Promptly with plastics in suction ripple constituent content, nano-particles size size, plastics resistivity, specific inductivity, coat-thickness closely related, different content has different shielding propertiess with thickness.
Basic principle of the present invention is as follows:
Nano material is because quantum size effect and the tunnel effect that its special structure causes causes it to produce good absorbing property in the certain size scope.
The purpose of electromagnetic wave shielding mainly contains two aspects: the one, and the electromagnetic field in control internal radiation zone does not make it run off a certain zone; The 2nd, prevent that external radiation from entering a certain zone.Hertzian wave can be regarded as by electric field component E and the organic plane wave that is formed by stacking of magnetic-field component H.Shielding electromagnetic waves mainly relies on the reflection of shielding, sorption to realize.Under high frequency condition, the shielding surface produces eddy current, eddy current produces counter magnetic field and offsets former magneticinterfering field, produces thermal losses simultaneously.
Hertzian wave advances to penetrate, absorbs, multiple phenomenon such as reflection, refraction after running into shielding, and total electromagnetic shielding effectiveness SE should be hertzian wave conductively-closed thing reflection loss R, absorption loss A, and interior part is penetrated the summation of loss B, that is:
SE＝R+A+B
A＝1. 7d√f/e
R＝(Z
0-Z
1)/(Z
0+Z
1)＝50+10Log(ρ·f)
-1
In the formula: Z
0=(μ
0/ ε
0)
1/2Z
1=(μ
1/ ε
1)
1/2
μ
0And μ
1---the magnetic permeability of freeboard and absorbing material;
ε
0And ε
1---the specific inductivity of freeboard and absorbing material.
ρ: shield volume specific resistance (Ω cm)
F: frequency (MHz)
D: shielding thickness (cm)
In order not produce reflection, reflection coefficient is necessary for zero.Promptly satisfy Z
0=Z
1Or μ
0/ ε
0=μ
1/ ε
1, Here it is desirable absorbing material impedance matching principle.Because the μ of real material is often less than μ
0And ε is greater than ε
0, be difficult to satisfy above-mentioned requirements, thereby adopt the method for impedance transition mechanism transition to reach impedance matching approx in this project.
By formula as can be seen, when f and d one timing, the ρ value has determined the screen layer conductivity, and the SE value is high more, and shield effectiveness is good more.The surface atom number of nanoparticle is directly proportional with α/γ substantially with the ratio of particle total atom number, and (γ is particle radii, and α is an atomic radius), the surface atom of nanoparticle exists a large amount of dangling bonds and lattice distortion, has bigger activity.The nanoparticle granularity is more little, and its surface atom is just many more, and its physical and chemical activity is just big more.From the wave-absorbing mechanism angle, absorbing material can be divided into conductivity type and magnetic conduction type two classes.So-called conductivity type absorbing material, promptly when absorbing material is subjected to the external magnetic field induction, produce induced current in conductor, this induced current produces the magnetic field opposite with the external magnetic field direction again, thereby offset with external magnetic field, reach the shielding effect of electromagnetic field to external world.Magnetic conduction type absorbing material then is by magnetic hysteresis loss and ferro resonance loss and absorb electromagnetic energy in a large number, and electromagnetic energy is converted into heat energy.Nano material is made up of crystalline phase and amorphous phase, the spuious magnetization of domain wall motion appears being unfavorable at material internal for the two-phase soft magnetic materials, make magnetic loss increase, increase with magnetic loss can cause the enhancing of material to the absorption of electromagnetic wave loss, the electromagnetic parameter of macroscopic view reflection material increases, and the magnetic loss of the nano material that Here it is particle diameter is little is greater than the physical essence of the magnetic loss of the big nano material of particle diameter.The wave-sucking performance of nano material increases with the increase of frequency, mainly is the loss because magnetic is burst, and eddy-current loss equal loss's mode has due to the characteristic that the increase with frequency increases.
Nano material is meant the material of the characteristic dimension of material component in the 1-100nm scope.When the size of a particulate is little during to nanometer scale, its microtexture and performance both be different from the microsystem of atom, molecule, also were different from the macrobead material meta system that shows eigen character, but between a transition system between the two.The nanoparticle size is little, and specific surface area is big, has very high surface energy, thereby its chemical property is had a significant impact.After experiment showed, that the particle dispersity is brought up to a certain degree, along with reducing of particle dia, be positioned at the atomicity of particle surface and the ratio of total atom number and sharply increase, when particle diameter was reduced to 5nm, the surface atom proportion can reach 50%.Because the surface atom number increases, atomicity reduces in the particulate, enable with in electronic level divide, the energy level spacing after the division is in the energy region interior (1 * 12 of microwave
-2-1 * 10
-5EV), thus cause new suction ripple passage.Nano material has small-size effect, surface interface effect, quantum size effect and macro quanta tunnel effect owing to himself structural feature, thereby compare with conventional material with component, have many unusual performances at aspects such as catalysis, optics, magnetic, mechanics, aspect absorption of electromagnetic wave, demonstrate good development prospect.When hertzian wave when a kind of medium enters another kind of medium, can produce reflection, refraction, diffraction and phenomenons such as scattering, absorption, so-called anti electromagnetic wave performance, being meant has bigger transmission attenuation when a certain shielding material of hertzian wave directive; Thereby reach the effect that makes the attenuation by absorption of electromagnetism wave height.
Embodiment 1
The nano plastic of adsorbing wave material contains 58% ABS plastic masterbatch, 33% nanometer β-carborundum, 1% nano-nickel powder, 8% polyaniline.
Embodiment 2
The preparation method of nano plastic of adsorbing wave material product, undertaken by following step successively:
A. plastic master batch is taken by weighing by weight percentage required weight pour into stir in the blender stand-by;
B. make the nanometer master batch: nanometer β-carborundum, nano-nickel powder, liquid polyaniline are taken by weighing required weight by weight percentage and pour in another blender, and ultra-sonic oscillation are even, and oven dry is granulated stand-by;
C takes by weighing required weight by weight percentage with the nanometer master batch that makes and plastic master batch and pours in the blender and stir, and its mixed weight ratio is: nanometer master batch: plastic master batch=1～2.8: 1.3～5.6, or 1～2.5: 2.0～5.0;
D. removal moisture drying;
E, technical process
1., nanometer master batch+plastic master batch batch mixing;
2., 60 ℃～65 ℃ removal moisture drying;
3., stir and add feed box;
4., in injection moulding machine, heat up, its intensification temperature is: 60 ℃-200 ℃ or 80 ℃-180 ℃;
5., pressure regulation in injection moulding machine, its pressure is 40-140MPa or 60-120MPa;
6., injection moulding or blowing;
7., absorbing material finished product.
Material requirements
1., nanometer β-carborundum, nano-nickel powder particle diameter be d＜100nm, its purity 〉=99%; Because the particle diameter difference, specific surface area, to expose unbound electron widely different, very big to the absorbing property influence, thereby be the key of plastic of adsorbing wave;
2., plastic master batch: comprise ABS, POM, PE, PA, PC, PMMA, PS, PVA chooses different plastic master batches according to different purposes, above-mentioned different kind can be that wherein independent a kind of plastic master batch also can be two or more compound making.
Embodiment 3
The nano plastic of adsorbing wave material contains 63% POM plastic matrix, 28% nanometer β-carborundum, 3% nano-nickel powder, 6% polyaniline.The preparation method is with embodiment 2.
Embodiment 4
The nano plastic of adsorbing wave material contains 68% PE plastic matrix, 18% nanometer β-carborundum, 4% nano-nickel powder, 10% polyaniline.The preparation method is with embodiment 2.
Embodiment 5
The nano plastic of adsorbing wave material contains 75% PA plastic matrix, nano β-carborundum of 15%, 2% nano-nickel powder, 8% polyaniline.The preparation method is with embodiment 2.
Embodiment 6
The nano plastic of adsorbing wave material contains 83% PC plastic matrix, 8% nanometer β-carborundum, 1% nano-nickel powder, 8% polyaniline.The preparation method is with embodiment 2.
Embodiment 7
The nano plastic of adsorbing wave material contains 80% PMMA plastic matrix, 10% nanometer β-carborundum, 2% nano-nickel powder, 8% polyaniline.The preparation method is with embodiment 2.
Embodiment 8
The nano plastic of adsorbing wave material contains 60% PS plastic matrix, 20% nanometer β-carborundum, 5% nano-nickel powder, 15% polyaniline.The preparation method is with embodiment 2.
Embodiment 9
The nano plastic of adsorbing wave material contains 65% PVA plastic matrix, 17% nanometer β-carborundum, 2% nano-nickel powder, 16% polyaniline.The preparation method is with embodiment 2.
In sum, adopt material compositions of the present invention, can be injection molded into the sheet material, profiled material, tubing, casing etc. of different shape or be blow molded into various shield cap and other protective articles.
Claims (4)
1, a kind of nano plastic of adsorbing wave material, form by plastic master batch and nano material, it is characterized in that said plastic master batch comprises: acrylonitrile-butadiene-phenylethylene multipolymer (ABS), polyoxymethylene (POM), polyethylene (PE), polyamide (PA), polycarbonate (PC), polymethyl methacrylate (PMMA), polystyrene (PS), polyvinyl chloride (PVC), politef (PTFE), vibrin; Said nano material comprises nanometer β-carborundum, nano-nickel powder, polyaniline; Wherein the nano plastic of adsorbing wave material contains 58%～83% plastic matrix, 8～33% nanometer β-carborundum, 1～6% nano-nickel powder, 8～22% polyaniline.
2, nano plastic of adsorbing wave material according to claim 1 is characterized in that said nano plastic of adsorbing wave material contains 63%～80% plastic matrix, 12～28% nanometer β-carborundum, 2～5% nano-nickel powder, 12～18% polyaniline.
3, nano plastic of adsorbing wave material according to claim 1 and 2 is characterized in that said nano plastic of adsorbing wave material contains 68%～75% plastic matrix, 13～25% nanometer β-carborundum, 3～4% nano-nickel powder, 8～16% polyaniline.
4, a kind of preparation method who realizes the nano plastic of adsorbing wave material product, undertaken by following step successively:
A, with plastic master batch take by weighing by weight percentage required weight pour into stir in the blender stand-by;
B, system nanometer master batch: nanometer β-carborundum, nano-nickel powder, liquid polyaniline are taken by weighing required weight by weight percentage and pour in another blender, and ultra-sonic oscillation are even, and oven dry is granulated stand-by;
C, the nanometer master batch that makes and plastic master batch are taken by weighing required weight by weight percentage pour in the blender and stir, its mixed weight ratio is: nanometer master batch: plastic master batch=1～2.8: 1.3～5.6;
D, removal moisture drying;
E, technical process
1., nanometer master batch+plastic master batch batch mixing;
2., 60 ℃～65 ℃ drying dehumidification dryings;
3., stir and add feed box;
4., in injection moulding machine, heat up, its intensification temperature is: 60 ℃-200 ℃;
5., pressure regulation in injection moulding machine, its pressure is 40-140MPa;
6., injection moulding or blowing;
7., absorbing material finished product.
Material requirements:
1., nanometer β-carborundum, nano-nickel powder particle diameter be d＜100nm, its purity 〉=99%;
2., plastic master batch: comprise ABS, POM, PE, PA, PC, PMMA, PS, PVC, politef PTFE, vibrin, above-mentioned different kind can be wherein independent a kind of plastic master batch, also can be two or more compound making.
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|---|---|---|---|
| CNB2005100430104A CN100494270C (en) | 2005-07-28 | 2005-07-28 | Nano wave-absorbing plastic material , and method for producing products made from the material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100430104A CN100494270C (en) | 2005-07-28 | 2005-07-28 | Nano wave-absorbing plastic material , and method for producing products made from the material |
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| Publication Number | Publication Date |
|---|---|
| CN1727401A true CN1727401A (en) | 2006-02-01 |
| CN100494270C CN100494270C (en) | 2009-06-03 |
Family
ID=35926936
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|---|---|---|---|
| CNB2005100430104A Expired - Fee Related CN100494270C (en) | 2005-07-28 | 2005-07-28 | Nano wave-absorbing plastic material , and method for producing products made from the material |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684188B (en) * | 2008-09-25 | 2011-08-24 | 深圳市新纶科技股份有限公司 | Polyaniline type electromagnetic shielding plastics |
| CN104072922A (en) * | 2014-07-08 | 2014-10-01 | 森鹤乐器股份有限公司 | Production method of antibacterial white key skins |
| CN105001573A (en) * | 2015-08-06 | 2015-10-28 | 安徽电信器材贸易工业有限责任公司 | Preparation technology for anti-radiation communication pipe material |
| CN105860928A (en) * | 2016-05-06 | 2016-08-17 | 陈昌 | Microwave absorbing nano material and preparation method thereof |
| CN113603983A (en) * | 2021-08-19 | 2021-11-05 | 安徽瑞琦塑胶科技有限公司 | Wave-absorbing plastic master batch and preparation method thereof |
| CN114437470A (en) * | 2021-12-23 | 2022-05-06 | 苏州铂韬新材料科技有限公司 | Environment-friendly polyvinyl chloride wave-absorbing material |
-
2005
- 2005-07-28 CN CNB2005100430104A patent/CN100494270C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684188B (en) * | 2008-09-25 | 2011-08-24 | 深圳市新纶科技股份有限公司 | Polyaniline type electromagnetic shielding plastics |
| CN104072922A (en) * | 2014-07-08 | 2014-10-01 | 森鹤乐器股份有限公司 | Production method of antibacterial white key skins |
| CN105001573A (en) * | 2015-08-06 | 2015-10-28 | 安徽电信器材贸易工业有限责任公司 | Preparation technology for anti-radiation communication pipe material |
| CN105860928A (en) * | 2016-05-06 | 2016-08-17 | 陈昌 | Microwave absorbing nano material and preparation method thereof |
| CN113603983A (en) * | 2021-08-19 | 2021-11-05 | 安徽瑞琦塑胶科技有限公司 | Wave-absorbing plastic master batch and preparation method thereof |
| CN114437470A (en) * | 2021-12-23 | 2022-05-06 | 苏州铂韬新材料科技有限公司 | Environment-friendly polyvinyl chloride wave-absorbing material |
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| Publication number | Publication date |
|---|---|
| CN100494270C (en) | 2009-06-03 |
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