CN104448676A - Metal macromolecule alloy shielding material and machining process thereof - Google Patents
Metal macromolecule alloy shielding material and machining process thereof Download PDFInfo
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Abstract
The invention discloses a metal macromolecule alloy shielding material which is prepared from 1-3% of a copper-plated carbon fiber material, 10-20% of copper powder, 2-10% of lead powder, 3-12% of chrome powder, 1-8% of conductive fiber and the balance of an ABS/PVC alloy material, wherein the use amounts of a coupling agent and a stabilizing agent account for 1% and 2% of that of the ABS/PVC alloy material; preferably, the metal macromolecule alloy shielding material is prepared from 10.0% of copper powder, 2.52% of copper fiber, 5.11% of lead powder, 7.42% of chrome powder, 2.67% of copper-plated carbon fiber and the balance of an ABS/PVC macromolecule material as well as 0.72% of the coupling agent and 1.45% of the stabilizing agent. The shielding efficiency of the material is 43dB. The metal macromolecule alloy shielding material is capable of massively absorbing and reflecting electromagnetic waves, and is high in shielding property.
Description
Technical field
What the present invention relates to is a kind of shielding material, is specifically related to a kind of metal-polymer alloy shielding material and complete processing thereof.
Background technology
In recent years, along with the high speed development of electronic industry, and the sharply increase of various commercialization and domestic electronic appliances quantity, electromagnetic interference (EMI) has become a kind of new social effects of pollution.Due to the microminiaturization of electronic circuit and element, integrated, lightweight and digitizing, the electric current used is weak current, and it controls power of signal and the power of external electromagnetic wave noise is close, and therefore easily causes malfunction, image and voice disorder etc.On the other hand, these electronic products itself also outwards launch the hertzian wave of different frequency, cause interference can to equally the robot calculator of contiguous operation and other communication, electrical equipment etc.Because the case material of the electronic product used at present instead of original metal or other effective shielding material by a large amount of plastics or similar macromolecular material, and common high molecular materials is isolator, hertzian wave almost can not be absorbed and reflect, have no screening ability.In order to address this problem, adopting conductive polymer composite to carry out electromagnetic shielding is a kind of effective method.
Summary of the invention
For the deficiency that prior art exists, the present invention seeks to be to provide a kind of metal-polymer alloy shielding material and complete processing thereof, can absorb hertzian wave in a large number and reflect, screening ability be strong.
To achieve these goals, the present invention realizes by the following technical solutions:
A kind of metal-polymer alloy shielding material, copper carbon fiber material 1-3%, copper powder 10-20%, lead powder 2-10%, chromium powder 3-12%, electro-conductive fiber 1-8%, surplus are ABS/PVC alloy material, couplant and stabilizing agent dosage are 1% and 2% of ABS/PVC alloy material consumption, wherein, copper powder 10.00%, copper fiber 2.52%, lead powder 5.11%, chromium powder 7.42%, copper carbon fiber 2.67%, surplus are ABS/PVC composite high-molecular material; Couplant 0.72%, stablizer 1.45%; Its shielding efficiency is: 43dB.
Its formula is as follows: copper powder 10.91%, copper fiber 4.85%, lead powder 8.12%, chromium powder 11.42%, and copper carbon fiber 2.28%, surplus are ABS/PVC composite high-molecular material; Couplant 0.62%, stablizer 1.25%; Its shielding efficiency is: 51dB.
Its formula is as follows: copper powder 13.38%, copper fiber 8.00%, lead powder 2.00%, chromium powder 5.88%, and copper carbon fiber 2.03%, surplus are ABS/PVC composite high-molecular material; Couplant 0.69%, stablizer 1.37%; Its shielding efficiency is: 70dB.
Its formula is as follows: copper powder 12.86%, copper fiber 1.00%, lead powder 5.37%, chromium powder 12.00%, and copper carbon fiber 1.52%, surplus are ABS/PVC composite high-molecular material; Couplant 0.67%, stablizer 1.35%; Its shielding efficiency is: 56dB.
Its formula is as follows: copper powder 14.20%, copper fiber 3.51%, lead powder 9.64%, chromium powder 5.45%, and copper carbon fiber 1.00%, surplus are ABS/PVC composite high-molecular material; Couplant 0.66%, stablizer 1.32%; Its shielding efficiency is: 48dB.
Its formula is as follows: copper powder 17.08%, copper fiber 6.07%, lead powder 2.85%, chromium powder 9.98%, and copper carbon fiber 3.00%, surplus are ABS/PVC composite high-molecular material; Its shielding efficiency is: 63dB.
Its formula is as follows: copper powder 16.24%, copper fiber 8.68%, lead powder 6.27%, chromium powder 4.34%, and copper carbon fiber 2.46%, surplus are ABS/PVC composite high-molecular material; Couplant 0.62%, stablizer 1.24%; Its shielding efficiency is: 72dB.
Its formula is as follows: copper powder 16.97%, copper fiber 1.88%, lead powder 10.00%, chromium powder 9.73%, and copper carbon fiber 2.23%, surplus are ABS/PVC composite high-molecular material; Couplant 0.59%, stablizer 1.18%; Its shielding efficiency is: 61dB.
A kind of complete processing of metal-polymer alloy shielding material is:
1, copper carbon fiber material manufactures.(11) certain suitable carbon fiber selected; (12) soluble chemistry degreaser in Stainless Steel Ware, is fixed on multi-strand carbon fiber bundle on the arm with swivel arrangement, immerses in degreasing fluid, starts swivel arrangement, rotates oil removing; (13) in hot water bath, adjust the temperature to 95 DEG C more than, soak the carbon fiber bundle 1-2 hour through electrochemical deoiling, rear half an hour implements running water; (14) with Palladous chloride 0.12g/L, tin protochloride 12g/L, 37% hydrochloric acid 100mL, pure water 200mL, carry out 20min activation-sensitized treatment; (15) with more than 70 DEG C distilled water with rinsing on the arm of swivel arrangement; (16) electroless copper, concentration of copper sulfate 0.02M, Seignette salt 0.09M, formaldehyde 0.04M, sodium hydroxide 0.18M, get 1 liter of solution, at 35 DEG C, electroplate 100min in electrolytic plating pool.The carbon fiber surface copper plated material made is for subsequent use.
2, composite metal powder preparation.(21) 10 μm are adopted, content: Cu >=99.85% copper powder (Cu >=99.85, Fe<0.02, Pb<0.05, As<0.005, Sb<0.01, O<0.15, Bi<0.004, S<0.004, impurity <0.3,166 yuan/kg); (22) 200 order lead powder (35 yuan/kg); 300 orders atomization chromium powder (>99.8%), respectively according to 10-20%, 2-20%, 3-12% ratio, mix, make different ratios composite metal powder for subsequent use in V-type metal powder mixer.
3, electro-conductive fiber preparation.Diameter 20 μm, the copper fiber of length 3-4mm.
4, ABS/PVC composite high-molecular material preparation.Mixed by a certain percentage by PVC, expanding material, lubricant, properties-correcting agent, through the even batch mixing of mixer, more mixing through twin screw extruder high speed, again apply twin screw extruder low speed with ABS material afterwards mixing, finally shear out composite high-molecular material particle.
5, above-mentioned copper carbon fiber material, composite metal powder (Cu powder, Al powder, Ni powder), electro-conductive fiber, several material of ABS/PVC composite high-molecular material are mixed with certain proportion, this procedure adds couplant and the stablizer of oneself research and development, at stirring-type mixer batch mixing.Proportional range is followed successively by: 1-3%, 10-20%, 2-10%, 3-12%, 1-8%, surplus are ABS/PVC alloy material, and couplant and stabilizing agent dosage are 1% and 2% of ABS/PVC alloy material consumption.Batch mixing rotating speed 60/min, mixing 1h.
6, the material mixed is put into conical double screw extruder and be processed into material master batch.
7, with China electron trade military standard SJ20524-1995, flange coaxial method is adopted to detect this metal high polymer alloy shielding material effectiveness of shielding.
Beneficial effect of the present invention: can absorb hertzian wave in a large number and reflect, screening ability be strong.
Accompanying drawing explanation
The present invention is described in detail below in conjunction with the drawings and specific embodiments;
Fig. 1-Fig. 4 is that copper powder in the present invention and copper fiber consumption are to shield effectiveness effect diagram;
Fig. 5-Fig. 7 is that copper powder in the present invention and lead powder consumption are to shield effectiveness effect diagram;
Fig. 8-Figure 10 is that chromium powder in the present invention and copper powder consumption are to shield effectiveness effect diagram;
Figure 11 is that copper carbon fiber in the present invention and copper powder consumption affect shield effectiveness;
Figure 12-Figure 13 is that copper fiber in the present invention and lead powder consumption are to shield effectiveness effect diagram;
Figure 14-Figure 15 is that copper fiber in the present invention and chromium powder consumption are to shield effectiveness effect diagram;
Figure 16 is that copper fiber in the present invention and copper carbon fiber consumption are to shield effectiveness effect diagram;
Figure 17 is that copper fiber in the present invention and high molecule alloy material consumption are to shield effectiveness effect diagram;
Figure 18 is that copper fiber in the present invention and high molecule alloy material consumption are to shield effectiveness effect diagram;
Figure 19 is that lead powder in the present invention and chromium powder consumption are to shield effectiveness effect diagram.
Embodiment
The technique means realized for making the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with embodiment, setting forth the present invention further.
With reference to Fig. 1-Figure 19, this embodiment is by the following technical solutions: a kind of metal-polymer alloy shielding material, its formula is as follows: copper carbon fiber material 1-3%, copper powder 10-20%, lead powder 2-10%, chromium powder 3-12%, electro-conductive fiber 1-8%, surplus are ABS/PVC alloy material, and couplant and stabilizing agent dosage are 1% and 2% of ABS/PVC alloy material consumption.
Copper powder in this embodiment and copper fiber consumption affect as Figure 1-Figure 4 shield effectiveness: in Fig. 1, Cu Powder (%) is copper powder consumption percentage ratio, and Cu Fiber (%) is copper fiber consumption percentage ratio.The increase of copper fiber consumption can improve the shield effectiveness of material, but in different copper powder consumption situation first, the amplitude of increase is different.In Fig. 2, Shielding Efficiency (dB) is shield effectiveness, unit decibel.
This embodiment copper powder and lead powder consumption affect as follows on shield effectiveness: in Fig. 5, AlPowder (%) is lead powder consumption percentage ratio.The shield effectiveness impact of visible lead powder consumption on material is complicated.As shown in Figure 6, the experiment display when copper powder consumption is lower, lead powder consumption reduces can improve shield effectiveness.As described in Figure 7, when copper powder consumption is higher, experiment display, improves shield effectiveness when lead powder consumption is increased to 7%, continues to increase lead powder consumption unfavorable to material shields effect.
Chromium powder and the copper powder consumption of this embodiment affect as follows on shield effectiveness: as shown in Figure 8, although chromium powder can reduce electromagnet shield effect, but can absorption loss be improved, reason is increased magnetic loss angle tangent, decreases the harm of destruction that hertzian wave causes environment, equipment and human health.Can learn the change along with copper powder consumption from experiment, chromium powder is also complicated on the impact of material shields effect.
This embodiment copper carbon fiber and copper powder consumption affect as follows on shield effectiveness: as shown in figure 11, copper carbon fiber is when copper powder usage ratio is little, little to material shields influential effect, when copper powder usage ratio is large, start to have an impact to material shields effect.
As shown in figure 12, copper fiber and lead powder consumption affect as follows on shield effectiveness: to material shields influential effect clearly, along with the increase of its ratio, shield effectiveness impact obviously increases copper fiber.Be not always the case in different lead powder consumption situation.
As Figure 14, copper fiber and chromium powder consumption affect shield effectiveness: to material shields influential effect clearly, along with the increase of its ratio, shield effectiveness impact obviously increases copper fiber.Be not always the case in different chromium powder consumption situation.
As Figure 19, lead powder affects shield effectiveness from chromium powder consumption: lead powder and chromium powder are complicated when mutual usage ratio is different to material shields influential effect.Can formulation strategy according to the actual requirements, manufacture the material of different shield effectiveness.
Embodiment 1: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 10.00%, copper fiber 2.52%, lead powder 5.11%, chromium powder 7.42%, and copper carbon fiber 2.67%, surplus are ABS/PVC composite high-molecular material; Couplant 0.72%, stablizer 1.45%.Its shielding efficiency is: 43dB.
Embodiment 2: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 10.91%, copper fiber 4.85%, lead powder 8.12%, chromium powder 11.42%, and copper carbon fiber 2.28%, surplus are ABS/PVC composite high-molecular material; Couplant 0.62%, stablizer 1.25%.Its shielding efficiency is: 51dB.
Embodiment 3: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 13.38%, copper fiber 8.00%, lead powder 2.00%, chromium powder 5.88%, and copper carbon fiber 2.03%, surplus are ABS/PVC composite high-molecular material; Couplant 0.69%, stablizer 1.37%.Its shielding efficiency is: 70dB.
Embodiment 4: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 12.86%, copper fiber 1.00%, lead powder 5.37%, chromium powder 12.00%, and copper carbon fiber 1.52%, surplus are ABS/PVC composite high-molecular material; Couplant 0.67%, stablizer 1.35%.Its shielding efficiency is: 56dB.
Embodiment 5: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 14.20%, copper fiber 3.51%, lead powder 9.64%, chromium powder 5.45%, and copper carbon fiber 1.00%, surplus are ABS/PVC composite high-molecular material; Couplant 0.66%, stablizer 1.32%.Its shielding efficiency is: 48dB.
Embodiment 6: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 17.08%, copper fiber 6.07%, lead powder 2.85%, chromium powder 9.98%, and copper carbon fiber 3.00%, surplus are ABS/PVC composite high-molecular material; Its shielding efficiency is: 63dB.
Embodiment 7: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 16.24%, copper fiber 8.68%, lead powder 6.27%, chromium powder 4.34%, and copper carbon fiber 2.46%, surplus are ABS/PVC composite high-molecular material; Couplant 0.62%, stablizer 1.24%.Its shielding efficiency is: 72dB.
Embodiment 8: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 16.97%, copper fiber 1.88%, lead powder 10.00%, chromium powder 9.73%, and copper carbon fiber 2.23%, surplus are ABS/PVC composite high-molecular material; Couplant 0.59%, stablizer 1.18%.Its shielding efficiency is: 61dB.
Embodiment 9: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 18.66%, copper fiber 4.43%, lead powder 3.74%, chromium powder 3.00%, and copper carbon fiber 1.81%, surplus are ABS/PVC composite high-molecular material; Couplant 0.68%, stablizer 1.37%.Its shielding efficiency is: 55dB.
Embodiment 10: described a kind of metal-polymer alloy shielding material, its formula is as follows: copper powder 20.00%, copper fiber 6.40%, lead powder 7.84%, chromium powder 8.51%, and copper carbon fiber 1.20%, surplus are ABS/PVC composite high-molecular material; Couplant 0.56%, stablizer 1.12%.Its shielding efficiency is: 77dB.
More than show and describe ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification sheets just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (9)
1. a metal-polymer alloy shielding material, it is characterized in that, copper carbon fiber material 1-3%, copper powder 10-20%, lead powder 2-10%, chromium powder 3-12%, electro-conductive fiber 1-8%, surplus are ABS/PVC alloy material, couplant and stabilizing agent dosage are 1% and 2% of ABS/PVC alloy material consumption, wherein, copper powder 10.00%, copper fiber 2.52%, lead powder 5.11%, chromium powder 7.42%, copper carbon fiber 2.67%, surplus are ABS/PVC composite high-molecular material; Couplant 0.72%, stablizer 1.45%; Its shielding efficiency is: 43dB.
2. a kind of metal-polymer alloy shielding material according to claim 1, it is characterized in that, its formula is as follows: copper powder 10.91%, copper fiber 4.85%, lead powder 8.12%, chromium powder 11.42%, and copper carbon fiber 2.28%, surplus are ABS/PVC composite high-molecular material; Couplant 0.62%, stablizer 1.25%; Its shielding efficiency is: 51dB.
3. a kind of metal-polymer alloy shielding material according to claim 1, it is characterized in that, its formula is as follows: copper powder 13.38%, copper fiber 8.00%, lead powder 2.00%, chromium powder 5.88%, and copper carbon fiber 2.03%, surplus are ABS/PVC composite high-molecular material; Couplant 0.69%, stablizer 1.37%; Its shielding efficiency is: 70dB.
4. a kind of metal-polymer alloy shielding material according to claim 1, it is characterized in that, its formula is as follows: copper powder 12.86%, copper fiber 1.00%, lead powder 5.37%, chromium powder 12.00%, and copper carbon fiber 1.52%, surplus are ABS/PVC composite high-molecular material; Couplant 0.67%, stablizer 1.35%; Its shielding efficiency is: 56dB.
5. a kind of metal-polymer alloy shielding material according to claim 1, it is characterized in that, its formula is as follows: copper powder 14.20%, copper fiber 3.51%, lead powder 9.64%, chromium powder 5.45%, and copper carbon fiber 1.00%, surplus are ABS/PVC composite high-molecular material; Couplant 0.66%, stablizer 1.32%; Its shielding efficiency is: 48dB.
6. a kind of metal-polymer alloy shielding material according to claim 1, it is characterized in that, its formula is as follows: copper powder 17.08%, copper fiber 6.07%, lead powder 2.85%, chromium powder 9.98%, and copper carbon fiber 3.00%, surplus are ABS/PVC composite high-molecular material; Its shielding efficiency is: 63dB.
7. a kind of metal-polymer alloy shielding material according to claim 1, it is characterized in that, its formula is as follows: copper powder 16.24%, copper fiber 8.68%, lead powder 6.27%, chromium powder 4.34%, and copper carbon fiber 2.46%, surplus are ABS/PVC composite high-molecular material; Couplant 0.62%, stablizer 1.24%; Its shielding efficiency is: 72dB.
8. a kind of metal-polymer alloy shielding material according to claim 1, it is characterized in that, its formula is as follows: copper powder 16.97%, copper fiber 1.88%, lead powder 10.00%, chromium powder 9.73%, and copper carbon fiber 2.23%, surplus are ABS/PVC composite high-molecular material; Couplant 0.59%, stablizer 1.18%; Its shielding efficiency is: 61dB.
9. its complete processing of metal-polymer alloy shielding material, is characterized in that,
(1), copper carbon fiber material manufactures: (11) select certain suitable carbon fiber; (12) soluble chemistry degreaser in Stainless Steel Ware, is fixed on multi-strand carbon fiber bundle on the arm with swivel arrangement, immerses in degreasing fluid, starts swivel arrangement, rotates oil removing; (13) in hot water bath, adjust the temperature to 95 DEG C more than, soak the carbon fiber bundle 1-2 hour through electrochemical deoiling, rear half an hour implements running water; (14) with Palladous chloride 0.12g/L, tin protochloride 12g/L, 37% hydrochloric acid 100mL, pure water 200mL, carry out 20min activation-sensitized treatment; (15) with more than 70 DEG C distilled water with rinsing on the arm of swivel arrangement; (16) electroless copper, concentration of copper sulfate 0.02M, Seignette salt 0.09M, formaldehyde 0.04M, sodium hydroxide 0.18M, get 1 liter of solution, at 35 DEG C, electroplate 100min in electrolytic plating pool, and the carbon fiber surface copper plated material made is for subsequent use;
(2), composite metal powder preparation: (21) adopt 10 μm, content: Cu >=99.85% copper powder; (22) 200 order lead powder 35 yuan/kg; 300 order atomization chromium powders, respectively according to 10-20%, 2-20%, 3-12% ratio, mix, make different ratios composite metal powder for subsequent use in V-type metal powder mixer;
(3), electro-conductive fiber preparation: diameter 20 μm, the copper fiber of length 3-4mm;
(4), ABS/PVC composite high-molecular material preparation: mixed by a certain percentage by PVC, expanding material, lubricant, properties-correcting agent, through the even batch mixing of mixer, mixing through twin screw extruder high speed again, again apply twin screw extruder low speed with ABS material afterwards mixing, finally shear out composite high-molecular material particle;
(5), by above-mentioned copper carbon fiber material, composite metal powder, electro-conductive fiber, several material of ABS/PVC composite high-molecular material mix with certain proportion, this procedure adds couplant and the stablizer of oneself research and development, at stirring-type mixer batch mixing; Proportional range is followed successively by: 1-3%, 10-20%, 2-10%, 3-12%, 1-8%, surplus are ABS/PVC alloy material, and couplant and stabilizing agent dosage are 1% and 2% of ABS/PVC alloy material consumption; Batch mixing rotating speed 60/min, mixing 1h;
(6), the material mixed is put into conical double screw extruder and be processed into material master batch;
(7), with China electron trade military standard SJ20524-1995, flange coaxial method is adopted to detect this metal high polymer alloy shielding material effectiveness of shielding.
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Application publication date: 20150325 |