CN109370205A - Electromagnetic shielding composite material containing stainless steel fibre - Google Patents
Electromagnetic shielding composite material containing stainless steel fibre Download PDFInfo
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- CN109370205A CN109370205A CN201811195328.8A CN201811195328A CN109370205A CN 109370205 A CN109370205 A CN 109370205A CN 201811195328 A CN201811195328 A CN 201811195328A CN 109370205 A CN109370205 A CN 109370205A
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- stainless steel
- steel fibre
- composite material
- electromagnetic shielding
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- 239000000835 fiber Substances 0.000 title claims abstract description 66
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 37
- 239000010935 stainless steel Substances 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 15
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 14
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 14
- 239000003063 flame retardant Substances 0.000 claims abstract description 14
- 239000004952 Polyamide Substances 0.000 claims abstract description 13
- 229920002647 polyamide Polymers 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 11
- IMUDHTPIFIBORV-UHFFFAOYSA-N aminoethylpiperazine Chemical compound NCCN1CCNCC1 IMUDHTPIFIBORV-UHFFFAOYSA-N 0.000 claims abstract description 5
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 claims abstract description 4
- -1 3,5- di-tert-butyl-hydroxy phenyl Chemical group 0.000 claims description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 8
- 239000004917 carbon fiber Substances 0.000 claims description 8
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 8
- 229920000877 Melamine resin Polymers 0.000 claims description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 6
- 229920000388 Polyphosphate Polymers 0.000 claims description 6
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 6
- 239000001205 polyphosphate Substances 0.000 claims description 6
- 235000011176 polyphosphates Nutrition 0.000 claims description 6
- OKOBUGCCXMIKDM-UHFFFAOYSA-N Irganox 1098 Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)NCCCCCCNC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 OKOBUGCCXMIKDM-UHFFFAOYSA-N 0.000 claims description 5
- 229920000299 Nylon 12 Polymers 0.000 claims description 5
- 229920000305 Nylon 6,10 Polymers 0.000 claims description 5
- 229920002302 Nylon 6,6 Polymers 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- GLDOVTGHNKAZLK-UHFFFAOYSA-N n-octadecyl alcohol Natural products CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 claims description 5
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 5
- 229920002292 Nylon 6 Polymers 0.000 claims description 4
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 4
- BNIILDVGGAEEIG-UHFFFAOYSA-L disodium hydrogen phosphate Chemical compound [Na+].[Na+].OP([O-])([O-])=O BNIILDVGGAEEIG-UHFFFAOYSA-L 0.000 claims description 4
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 4
- 235000019260 propionic acid Nutrition 0.000 claims description 4
- 229910000077 silane Inorganic materials 0.000 claims description 4
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical compound C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims description 4
- BZQKBFHEWDPQHD-UHFFFAOYSA-N 1,2,3,4,5-pentabromo-6-[2-(2,3,4,5,6-pentabromophenyl)ethyl]benzene Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1CCC1=C(Br)C(Br)=C(Br)C(Br)=C1Br BZQKBFHEWDPQHD-UHFFFAOYSA-N 0.000 claims description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- 229910000410 antimony oxide Inorganic materials 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 claims description 3
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 3
- VETPHHXZEJAYOB-UHFFFAOYSA-N 1-n,4-n-dinaphthalen-2-ylbenzene-1,4-diamine Chemical compound C1=CC=CC2=CC(NC=3C=CC(NC=4C=C5C=CC=CC5=CC=4)=CC=3)=CC=C21 VETPHHXZEJAYOB-UHFFFAOYSA-N 0.000 claims description 2
- 229920006150 hyperbranched polyester Polymers 0.000 claims description 2
- 239000004645 polyester resin Substances 0.000 claims description 2
- 238000007598 dipping method Methods 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 229920006122 polyamide resin Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 239000000047 product Substances 0.000 description 7
- 230000005670 electromagnetic radiation Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- BSZXAFXFTLXUFV-UHFFFAOYSA-N 1-phenylethylbenzene Chemical compound C=1C=CC=CC=1C(C)C1=CC=CC=C1 BSZXAFXFTLXUFV-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 125000001246 bromo group Chemical class Br* 0.000 description 2
- 239000011231 conductive filler Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- VCAFTIGPOYBOIC-UHFFFAOYSA-N phenyl dihydrogen phosphite Chemical class OP(O)OC1=CC=CC=C1 VCAFTIGPOYBOIC-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- GEYOCULIXLDCMW-UHFFFAOYSA-N 1,2-phenylenediamine Chemical compound NC1=CC=CC=C1N GEYOCULIXLDCMW-UHFFFAOYSA-N 0.000 description 1
- QTWJRLJHJPIABL-UHFFFAOYSA-N 2-methylphenol;3-methylphenol;4-methylphenol Chemical compound CC1=CC=C(O)C=C1.CC1=CC=CC(O)=C1.CC1=CC=CC=C1O QTWJRLJHJPIABL-UHFFFAOYSA-N 0.000 description 1
- SZWMYRXPLPUQQB-UHFFFAOYSA-N C(#N)NC(=O)N.N1=C(N)N=C(N)N=C1N Chemical compound C(#N)NC(=O)N.N1=C(N)N=C(N)N=C1N SZWMYRXPLPUQQB-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 150000004985 diamines Chemical class 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 229920006124 polyolefin elastomer Polymers 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a kind of electromagnetic shielding composite material containing stainless steel fibre, each component weight proportions are as follows: 50 ~ 85 parts of polyamide, 5 ~ 20 parts of continuous stainless steel fibre, 5 ~ 10 parts of graphite powder, 3 ~ 8 parts of metal powder, be chopped 2 ~ 4 parts of conductive fiber, 0.2 ~ 1 part of antioxidant, 0.5 ~ 3 part of impregnating resin, 0.2 ~ 0.5 part of 2- tert-butyl-4-methyl-Phenol, 8 ~ 25 parts of fire retardant, 2-6 parts of POE-g-MAH, 0.1 ~ 0.3 part of aminoethyl piperazine；The continuous stainless steel fibre filament diameter is 10 ~ 20 μm, and core number is 2000 ~ 12000；The grafting rate of the POE-g-MAH is more than or equal to 1%.The present invention has widened the width of shielding frequency band, has not only reduced the cost of material, but also expanded the application field of material, and shield effectiveness is up to 60dB in 30MHz-1.5GHz.
Description
Technical field
The present invention relates to a kind of electromagnetic shielding composite materials containing stainless steel fibre, belong to conductive polymer material field.
Background technique
In recent years, with universal, the construction of high-voltage fence of various electric appliances, the application of accurate Medical Devices, electronics, communication
The rapid development of equipment, thus bring electromagnetic radiation pollution is also increasingly severe.Electromagnetic radiation pollution has become after atmosphere dirt
Dye, water pollution, the fourth-largest environmental pollution after noise pollution have been classified as the important pollutant that must be strictly controlled by the United Nations
One of.
Electromagnetic radiation pollution is effectively prevent to protect environment and human health, prevents electromagnetic interference and leakage to ensure information
Safety, it has also become the problem of each national capital urgent need to resolve of our times.Various countries all by promulgate various laws and regulations and standard come
The electromagnetic radiation dosage of all kinds of commercialized products of peremptory norm.China is also to being related to human health safety, environmental protection and public
The product of safety is forced to carry out the CCC approval procedure including Electromagnetic Compatibility authentication (CEMC certification).
Electromagnetic shielding is jamproof important means, and administers the effective means of electromagnetic environmental pollution, can also be prevented
Electromagnetic information is divulged a secret, and each state has put into many manpower and material resources all to carry out the research and development of electromagnetic shielding material.China exists
The ratio of understanding development on electromagnetic environment security significance is later, and industry development lags behind developed country's level.In order to ensure state
The information security of the departments such as family's politics, military and economy, defends the national benefit, and promotes connecing for domestic electronic product and international market
Rail, it is necessary to greatly develop electromangnetic spectrum.Summary of the invention
The present invention provides a kind of electromagnetic shielding composite material containing stainless steel fibre, and the electromagnetic shielding for containing stainless steel fibre is compound
Material has widened the width of shielding frequency band, has not only reduced the cost of material, but also expanded the application field of material, shield effectiveness exists
Up to 60dB in 30MHz-1.5GHz, and shield effectiveness is almost all reaching the 35dB or more effectively shielded.
To achieve the above object of the invention, the technical solution adopted by the present invention is that: a kind of electromagnetic shielding containing stainless steel fibre
Composite material, each component weight proportion are as follows:
50 ~ 85 parts of polyamide,
Continuous 5 ~ 20 parts of stainless steel fibre,
1 ~ 2 part of silane resin acceptor kh-550,
5 ~ 10 parts of graphite powder,
3 ~ 8 parts of metal powder,
Be chopped 2 ~ 4 parts of conductive fiber,
0.2 ~ 1 part of antioxidant,
0.5 ~ 3 part of impregnating resin,
0.2 ~ 0.5 part of 2- tert-butyl-4-methyl-Phenol,
8 ~ 25 parts of fire retardant,
2 ~ 6 parts of POE-g-MAH,
0.1 ~ 0.3 part of aminoethyl piperazine；
The continuous stainless steel fibre filament diameter is 10 ~ 20 μm, and core number is 2000 ~ 12000；
The grafting rate of the maleic anhydride stem grafting polyolefin elastomer is more than or equal to 1%.
The further improved technical solution of above-mentioned technical proposal is as follows:
1. in above scheme, the polyamide be polyamide 6, polyamide 66, polyamide 12, in polyamide 610 at least
It is a kind of.
2. in above scheme, the chopped conductive fiber is chopped carbon fiber, the nickel-coated carbon fibers that are chopped, be chopped plating metal
At least one of glass fibre, this conductive fiber length that is chopped is 5 ~ 10mm.
3. in above scheme, the impregnating resin is one of CBT resin, Hyperbranched Polyester Resin.
4. in above scheme, the powder diameter of the graphite powder and metal powder is less than 10 μm.
5. in above scheme, the antioxidant is N, N'- is bis--(3- (3,5- di-tert-butyl-hydroxy phenyl) propiono)
Hexamethylene diamine (antioxidant 1098), β-(3,5- di-tert-butyl-hydroxy phenyl) propionic acid n-octadecyl alcohol ester (antioxidant 1076), three
(2,4- di-t-butyl) phenyl-phosphite (irgasfos 168), N, N'- bis- (betanaphthyl) p-phenylenediamine (DNP), disodium hydrogen phosphate
(H10), at least one of organocopper compound (H3336).
6. in above scheme, the fire retardant is decabromodiphenylethane, melamine polyphosphate, melamine cyanurea
At least one of hydrochlorate, antimony oxide, zinc borate.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages:
1. the electromagnetic shielding composite material of the invention containing stainless steel fibre, formula addition filler are with continuous stainless steel fibre
It is main, it is further added to 5 ~ 10 parts of graphite powder, 3 ~ 8 parts of metal powder, chopped 2 ~ 5 parts of conductive fiber, it can be in minimum stainless steel
Complete conductive network is formed under fiber content, reduces the dosage of stainless steel fibre, has also been widened the width of shielding frequency band, had both been dropped
The low cost of material, and the application field of material has been expanded, shield effectiveness is up to 60dB in 30MHz-1.5GHz, and
And shield effectiveness is almost all reaching the 35dB or more effectively shielded.
2. the electromagnetic shielding composite material containing stainless steel fibre of the invention, further it is added in formula silane coupled
1 ~ 2 part of agent KH-550,0.2 ~ 0.5 part of 2- tert-butyl-4-methyl-Phenol strengthen 5 ~ 10 parts of graphite powder, 3 ~ 8 parts of metal powder, short
The combination for cutting 2 ~ 5 parts of conductive fiber and matrix resin is compatible, effectively reduces addition conductive filler to product overall mechanical properties
Caused by adverse effect, bending strength has been more than 99MPa, and tensile strength has been more than 70MPa, and notch shock has been more than 5.2 kJ/
m2。
3. the electromagnetic shielding composite material containing stainless steel fibre of the invention, impregnating resin 0.5 is further added in formula
~ 3 parts, 2 ~ 6 parts of POE-g-MAH, 0.1 ~ 0.3 part of aminoethyl piperazine increase filler dispersibility, avoid reunion, avoid mixed
Expect the performance inconsistency of product caused by unevenness, conductive fiber can be uniformly dispersed in everywhere, the electrical property of product in product obtained
Can, shield effectiveness is stablized.
Specific embodiment
The present invention will be further described below with reference to examples:
Embodiment 1 ~ 5: a kind of electromagnetic shielding composite material containing stainless steel fibre, each component weight proportion are as follows:
Table 1
；
Above-mentioned continuous stainless steel fibre filament diameter is 10 ~ 20 μm, and core number is 2000 ~ 12000；
The grafting rate of above-mentioned POE-g-MAH is more than or equal to 1%；
The powder diameter of above-mentioned graphite powder and metal powder is less than 10 μm.
Polyamide is polyamide 6 in embodiment 1, and above-mentioned chopped conductive fiber is chopped carbon fiber, this conduction that is chopped
Fibre length is 5 ~ 10mm；Above-mentioned antioxidant is N, N'- is bis--(3- (3,5- di-tert-butyl-hydroxy phenyl) propiono) oneself two
The mixture of amine (antioxidant 1098), three (2,4- di-t-butyl) phenyl-phosphites (irgasfos 168)；Above-mentioned fire retardant is ten bromines
Diphenylethane, melamine polyphosphate are mixed according to the parts by weight of 1:2.
Polyamide is polyamide 66, polyamide 12 according to the mixing of 1:1 parts by weight, the chopped conduction in embodiment 2
Fiber is the metallized glass fiber that is chopped, this conductive fiber length that is chopped is 5 ~ 10mm, and the antioxidant is β-(3,5- bis- tertiary fourths
Base -4- hydroxy phenyl) propionic acid n-octadecyl alcohol ester (antioxidant 1076), three (2,4- di-t-butyl) phenyl-phosphite (antioxidant
168) mixture；The fire retardant is melamine cyanurate.
Polyamide is polyamide 66, polyamide 610 according to the mixing of 2:1 parts by weight, the chopped conduction in embodiment 3
Fiber is the nickel-coated carbon fibers that are chopped, this conductive fiber length that is chopped is 5 ~ 10mm, and the antioxidant is N, and N'- bis- (betanaphthyl) is right
The mixture of phenylenediamine (DNP), disodium hydrogen phosphate (H10)；The fire retardant is melamine polyphosphate, antimony oxide
Mixture.
Polyamide is polyamide 610 in embodiment 4, and the chopped conductive fiber is chopped carbon fiber, this is chopped and leads
Electric fibre length is 5 ~ 10mm；The antioxidant is N, N'- is bis--(3- (3,5- di-tert-butyl-hydroxy phenyl) propiono) oneself
Diamines (antioxidant 1098)；The fire retardant is the mixture of melamine polyphosphate, zinc borate formation.
Polyamide is the mixture of polyamide 12, polyamide 610 in embodiment 5, and the chopped conductive fiber is short
Metallized glass fiber is cut, this conductive fiber length that is chopped is 5 ~ 10mm；The antioxidant is β-(3,5- di-t-butyl -4- hydroxyl
Base phenyl) propionic acid n-octadecyl alcohol ester (antioxidant 1076)；The fire retardant is decabromodiphenylethane.
A kind of preparation method of the above-mentioned electromagnetic shielding composite material containing stainless steel fibre, comprising the following steps:
Step 1: a branch of continuous continuous 5 ~ 20 parts of stainless steel fibre is at the uniform velocity equipped in the slot of at least two pressure roller by one,
Make fiber drawout as far as possible, the ethanol solution of the coupling agent of 1-2% is filled in slot, the fiber pulled out passes through drying tunnel
Drying；
Step 2: the continuous stainless steel fibre after beam preheating is at the uniform velocity passed through into a heating tank, wherein filling heating melting
0.5 ~ 3 part of impregnating resin, have multiple pressure rollers in slot, fiber drawout as far as possible can be made with impregnating resin, after porcelain circle control glue
It is pulled into extrusion die；
Step 3: 50 ~ 85 parts of precise polyamide, 0.2 ~ 1 part of antioxidant, POE-g-MAH2 ~ 6 part, 2- tert-butyl -4-
0.2 ~ 0.5 part of methylphenol, 8 ~ 25 parts of fire retardant, 0.1 ~ 0.3 part of aminoethyl piperazine, after mixing from double screw extruder
Main feeding be added；5 ~ 10 parts of precise graphite powder, 3 ~ 8 parts of metal powder, be chopped 2 ~ 4 parts of conductive fiber, from side feeding measurement
It is added, extrusion temperature is 240-300 DEG C；
Step 4: a coating mould is arranged in the head in double screw extruder, step is pulled up in the side perpendicular with screw rod
Rapid two treated stainless steel fibres make equably to wrap one layer of resin outside fibre bundle by infiltration mold；
Step 5: the material strip after depanning to be sent into the long particle that dedicated pelleter is cut into 6-10mm after cold bath is cooling, dry
It is dry, packaging.
The content of above-mentioned continuous stainless steel fibre is set by the main-machine screw revolving speed of control double screw extruder, fiber traction
The die orifice size of standby hauling speed, infiltration mold carrys out Reverse Turning Control.
Comparative example 1 ~ 2: a kind of electromagnetic shielding composite material containing stainless steel fibre, each component weight proportion are, such as 2 institute of table
Show:
Table 2
| Comparative example 1 | Comparative example 2 | |
| Polyamide | 60 parts | 75 parts |
| Continuous stainless steel fibre | 10 parts | 12 parts |
| Silane resin acceptor kh-550 | 2 parts | 1.2 part |
| Graphite powder | - | 5 parts |
| Metal powder | - | 5 parts |
| Be chopped conductive fiber | - | 3 parts |
| Antioxidant | 0.6 part | 0.4 part |
| Impregnating resin | 2.5 part | - |
| 2- tert-butyl-4-methyl-Phenol | 0.3 part | - |
| Fire retardant | 20 parts | 18 parts |
| POE-g-MAH | 3 parts | - |
| Aminoethyl piperazine | 0.2 part | - |
；
Above-mentioned continuous stainless steel fibre filament diameter is 10 ~ 20 μm, and core number is 2000 ~ 12000；
The grafting rate of above-mentioned POE-g-MAH is more than or equal to 1%；
The powder diameter of above-mentioned graphite powder and metal powder is less than 10 μm.
Polyamide is polyamide 6 in comparative example 1, and above-mentioned chopped conductive fiber is chopped carbon fiber, this conduction that is chopped
Fibre length is 5 ~ 10mm；Above-mentioned antioxidant is N, N'- is bis--(3- (3,5- di-tert-butyl-hydroxy phenyl) propiono) oneself two
The mixture of amine (antioxidant 1098), three (2,4- di-t-butyl) phenyl-phosphites (irgasfos 168)；Above-mentioned fire retardant is ten bromines
Diphenylethane, melamine polyphosphate are mixed according to the parts by weight of 1:2.
Polyamide is polyamide 66, polyamide 12 according to the mixing of 1:1 parts by weight, the chopped conduction in comparative example 2
Fiber is the metallized glass fiber that is chopped, this conductive fiber length that is chopped is 5 ~ 10mm, and the antioxidant is β-(3,5- bis- tertiary fourths
Base -4- hydroxy phenyl) propionic acid n-octadecyl alcohol ester (antioxidant 1076), three (2,4- di-t-butyl) phenyl-phosphite (antioxidant
168) mixture；The fire retardant is melamine cyanurate.
The same embodiment of the preparation process of comparative example.
The performance detection data of electromagnetic shielding composite material made from Example 1 and Example 2 of the present invention and comparative example is shown in
Table 3.
Table 3
| Test item | Examination criteria | Embodiment 1 | Embodiment 2 | Comparative example 1 | Comparative example 2 |
| Density g/cm3 | ASTM D792 | 1.31 | 1.3 | 1.2 | 1.28 |
| Tensile strength MPa | ASTM D638 | 81.05 | 76.12 | 75.5 | 65.3 |
| Bending strength MPa | ASTM D790 | 112.44 | 99.56 | 100.44 | 80.2 |
| Notch shock kJ/m2 | ASTM D256 | 5.34 | 5.42 | 5.2 | 4.4 |
| Shield effectiveness dB | ASTM D4935 | 60 | 58 | 48 | 54 |
；
From above-mentioned table 3 we can see that under the electromagnetic shielding composite material mechanical performance produced by the present invention containing stainless steel fibre
Drop is few, and shield effectiveness is up to 60dB in 30MHz-1.5GHz, and shield effectiveness is almost all reaching effective shielding
35dB or more；In addition, effectively reducing addition conductive filler adverse effect caused by product overall mechanical properties, bending is strong
Degree has been more than 99MPa, and tensile strength has been more than 70MPa, and notch shock has been more than 5.2 kJ/m2.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (7)
1. a kind of electromagnetic shielding composite material containing stainless steel fibre, it is characterised in that: each component weight proportion are as follows:
50 ~ 85 parts of polyamide,
Continuous 5 ~ 20 parts of stainless steel fibre,
1 ~ 2 part of silane resin acceptor kh-550,
5 ~ 10 parts of graphite powder,
3 ~ 8 parts of metal powder,
Be chopped 2 ~ 4 parts of conductive fiber,
0.2 ~ 1 part of antioxidant,
0.5 ~ 3 part of impregnating resin,
0.2 ~ 0.5 part of 2- tert-butyl-4-methyl-Phenol,
8 ~ 25 parts of fire retardant,
2 ~ 6 parts of POE-g-MAH,
0.1 ~ 0.3 part of aminoethyl piperazine；
The continuous stainless steel fibre filament diameter is 10 ~ 20 μm, and core number is 2000 ~ 12000；
The grafting rate of the POE-g-MAH is more than or equal to 1%.
2. the electromagnetic shielding composite material according to claim 1 containing stainless steel fibre, it is characterised in that: the polyamide
Resin is at least one of polyamide 6, polyamide 66, polyamide 12, polyamide 610.
3. the electromagnetic shielding composite material according to claim 1 containing stainless steel fibre, it is characterised in that: described be chopped is led
Electric fiber is chopped carbon fiber, the nickel-coated carbon fibers that are chopped, be chopped at least one of metallized glass fiber, this is chopped conductive fine
Dimension length is 5 ~ 10mm.
4. the electromagnetic shielding composite material according to claim 1 containing stainless steel fibre, it is characterised in that: the dipping tree
Rouge is one of CBT resin, Hyperbranched Polyester Resin.
5. the electromagnetic shielding composite material according to claim 1 containing stainless steel fibre, it is characterised in that: the graphite powder
Powder diameter with metal powder is less than 10 μm.
6. the electromagnetic shielding composite material according to claim 1 containing stainless steel fibre, it is characterised in that: the antioxidant
For N, N'- is bis--(3- (3,5- di-tert-butyl-hydroxy phenyl) propiono) hexamethylene diamine (antioxidant 1098), β-(the tertiary fourth of 3,5- bis-
Base -4- hydroxy phenyl) propionic acid n-octadecyl alcohol ester (antioxidant 1076), three (2,4- di-t-butyl) phenyl-phosphite (antioxidant
168), N, N'- bis- (betanaphthyl) p-phenylenediamine (DNP), disodium hydrogen phosphate (H10), in organocopper compound (H3336) at least
It is a kind of.
7. the electromagnetic shielding composite material according to claim 1 containing stainless steel fibre, it is characterised in that: the fire retardant
For at least one in decabromodiphenylethane, melamine polyphosphate, melamine cyanurate, antimony oxide, zinc borate
Kind.
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| WO2021092712A1 (en) * | 2019-11-11 | 2021-05-20 | 常德鑫睿新材料有限公司 | Electromagnetic shielding composite conductive thin film and preparation method therefor |
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