CN108929487A - A kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method - Google Patents
A kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method Download PDFInfo
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- CN108929487A CN108929487A CN201810822561.8A CN201810822561A CN108929487A CN 108929487 A CN108929487 A CN 108929487A CN 201810822561 A CN201810822561 A CN 201810822561A CN 108929487 A CN108929487 A CN 108929487A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- 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
Abstract
The invention discloses a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation methods.A kind of thermally conductive electromagnetic shielding polypropylene composite material includes following weight ratio component: acrylic resin 40%-60%, toughener 5%-10%, thermal conducting agent 5%-20%, conductive agent 10%-25%, antioxidant 0.2%-0.5%, lubricant 0.5%-1%, compatilizer 1%-10%.Preparation method is first to be pre-mixed acrylic resin, toughener, compatilizer, and antioxidant and lubricant is then added, and thermal conducting agent and conductive agent, the extruding pelletization in double screw extruder is added by side feed material, extrusion temperature is 180-220 DEG C.The present invention is inexpensive light, and excellent in mechanical performance is easy to form, and has good heating conduction and electromagnetic shielding performance, can be widely applied in the communication fields such as electronics, telecommunications.
Description
Technical field
The present invention relates to macromolecule modified field of material technology, and in particular to a kind of thermally conductive electromagnetic shielding polypropylene composite wood
Material and preparation method thereof.
Background technique
With the rapid development of society, it is more to be widely used in electronics, communication element and office appliance etc. for polypropylene plastics
Kind field, but a large amount of heat of generation, if not in time sent out these heats, first device can be sent out when the running of these components
The service life of part will will be greatly reduced.And the electromagnetic interference generated when the work of these electronics, communication apparatus, electromagnetic radiation phenomenon are more next
More endanger daily life, thus greatly develop with it is thermally conductive and electromagnetic shielding material it is imperative, to thermally conductive and electric
The requirement of magnetic shielding material is also higher and higher.People propose more higher requirements, functionalization to the application of polypropylene material
Have become an important development direction of high molecular material, heat-conducting polymer material and electromagnetic shielding macromolecule material are also therewith
Enter the research vision of people.
Up to the present, the heat-conducting polymer material everyways such as from basic theory to product development are that high molecular material is ground
One of important content studied carefully, and there are also many problems have it is to be solved.By taking filled-type thermally conductive material as an example, HEAT-CONDUCTING PLASTICS FILLED WTTH PARTICLES
Most of to be filled using physics, heating conduction is not high, and mechanical performance decline is serious, and thermal coefficient prediction theory is confined to Empirical Mode
It is quasi-, lack the theories integration of thermal conduction mechanism.The compatibility to improve it with matrix is surface-treated to filler first, make its
It is can be uniformly dispersed in matrix；Secondly the mode of a variety of filler mixing fillings is considered to improve material thermal conductivity, and is searched out and most closed
Suitable proportion of filler；Certain contour machining procedure is finally used, is made it possible under less amount of filler, material thermal conductivity is being improved
Rate guarantees the stabilization of other performances simultaneously, and high molecular material is enable more effectively to substitute conventional thermal conductive material.With metal oxide
The thermal conductivity of material, and the insulating properties of energy reserved materials, cheap reality not only can be improved for the high molecular material of thermal conducting agent
Favour, and it is from a wealth of sources.
The effect of electromagnetic shielding, is turned off electromagnetic wave propagation approach, to eliminate its interference.It is using shield to electricity
Field and magnetic field are shielded simultaneously, are generally used to shield electromagnetic field of high frequency.Material for electromagnetic shielding is mainly iron
Magnetic material, ferroelectric material, conductive polymer material, conductive coating etc., common electromagnetic shielding material are generally made based on metal
Used in plate, band or paint pattern, these materials are widely used but there is also some shortcomings, such as density is big, construction is multiple
It is miscellaneous, molding is more difficult etc., therefore develop the material light, electromagnet shield effect is good there is very high use value.
Summary of the invention
The invention reside in overcoming the deficiencies of existing technologies, a kind of polypropylene composite materials with thermally conductive electro-magnetic screen function are provided
Material and preparation method thereof, the thermally conductive electromagnetic shielding polypropylene composite material is inexpensive light, and excellent in mechanical performance can be molded into
Type can effectively shield electromagnetic interference, and can quickly guide the heat of telecommunications component generation.
A kind of PP composite material and preparation method thereof with thermally conductive electro-magnetic screen function, it is characterised in that including with
The component of lower weight percent: acrylic resin 40%-60%, toughener 5%-10%, thermal conducting agent 5%-20%, conductive agent
10%-25%, antioxidant 0.2%-5%, lubricant 0.5%-1%, compatilizer 1%-10%.
Preferably, the acrylic resin is polypropylene or high density polyethylene (HDPE).
Further, the polyacrylic melting means 10-45g/10min.
Preferably, the toughener is polyolefin elastomer, PE, Styrene-Butadiene-Styrene Block Copolymer, benzene
One of ethylene-isoprene-styrene block copolymer.
Preferably, the thermal conducting agent is one of magnesia, aluminium oxide, zinc oxide, aluminium nitride, boron nitride, silicon carbide
Or the combination of several above ratios.
Preferably, the conductive agent is the nanoscale stone of the nano-scale carbon nanotube of diameter 10-40mm, partial size 10-15mm
One of black alkene, diameter 2-4mm carbon fiber.
Preferably, the antioxidant is one in antioxidant 1010, irgasfos 168, antioxidant 3114 and antioxidant 1098
Kind is several.
Preferably, the lubricant is calcium stearate, zinc stearate, double ethylene stearic amides, one in polyethylene wax
Kind is several.
Preferably, the compatilizer is PP-g-MAH or PP-g-GMA.
Preferably, the thermal conducting agent, conductive agent material diameter be 0.1-20 microns.
Polypropylene has mechanical strength good as an important species in engineering plastics, heat-resist, resistant to chemical etching
The features such as, inventor has found in lab process, and particular size partial size is added in the acrylic resin of appropriate melt index
Or the carbon material conductive agent and thermal conducting agent of diameter can construct excellent thermal conductivity network path, carbon nanomaterial conductive agent energy
Enough and metal oxide thermal conducting agent acts synergistically, and greatly improves the thermally conductive and electromagnetic shielding performance of acrylic resin.
The thermally conductive electromagnetic shielding material polypropylene modified material, preparation method are as follows: by acrylic resin, toughening
Agent, compatilizer are first pre-mixed, and antioxidant then is added and lubricant, thermal conducting agent and conductive agent are added by side feed material, in double spiral shells
Extruding pelletization in bar extruder, extrusion temperature are 180-220 DEG C.Specific step is as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 180 ± 5 DEG C of area's temperature, two area's temperature
Spend 200 ± 5 DEG C, 200 ± 5 DEG C of three area's temperature, 200 ± 5 DEG C of four area's temperature, 200 ± 5 DEG C of five area's temperature, head temperature 190 ± 5
DEG C, 300-350 revs/min of screw host revolving speed, 70-90 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
The beneficial effects of the present invention are: the invention reside in be added to be suitble to greatly in the polypropylene material of suitable melt index
The carbon material conductive agent and metal oxide thermal conducting agent of small particle and diameter construct conductive and heat-conductive network path, make carbon material and gold
Belong to oxide to act synergistically, substantially increases the thermal conductivity and electromagnetic shielding performance of polypropylene material；The present invention will be thermally conductive
Agent and conductive agent are added by side feed material, and production equipment is high-efficient, convenient for large-scale production；Thermally conductive electricity prepared by the present invention
Magnetic screen PP composite material has very high thermal conductivity and electromagnetic shielding performance, and thermal coefficient is in 3.0W/m or more, electromagnetism
Shield effectiveness reaches 40Db or more, and good mechanical properties, processing performance is excellent, can satisfy the needs of electronics.
Specific embodiment
For technical solution of the present invention and advantage is more clearly understood, below in conjunction with specific embodiment, to the present invention
It is described in further detail.It should be understood that specific embodiment described herein is only to explain the present invention, and
Do not limit the scope of the invention.
Embodiment 1
The pp resin that a kind of thermally conductive electromagnetic shielding polypropylene material component and weight percent are 53 parts, 5 parts of PE, 20 parts
Silicon carbide, the nanoscale graphite alkene of 15 parts of partial size 10mm, 0.5 part of irgasfos 168 and 1010,1.5 parts of lubricant, 5 parts
Compatilizer.
The thermally conductive electromagnetic shielding material polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 181 DEG C of area's temperature, two area's temperature
198 DEG C, 201 DEG C of three area's temperature, 197 DEG C of four area's temperature, 199 DEG C of five area's temperature, 189 DEG C of head temperature, screw host revolving speed 321
Rev/min, 74 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Embodiment 2
A kind of thermally conductive electromagnetic shielding polypropylene material quality component proportion is as follows: 52 parts of pp resin, 5 parts of PE, and 19 parts
Magnesia, the nano-scale carbon nanotube of 17 parts of diameter 20mm, 0.5 part of antioxidant 1010,1.5 parts of lubricant, 5 parts of phase
Hold agent.
The thermally conductive electromagnetic shielding material polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 183 DEG C of area's temperature, two area's temperature
199 DEG C, 203 DEG C of three area's temperature, 199 DEG C of four area's temperature, 201 DEG C of five area's temperature, 190 DEG C of head temperature, screw host revolving speed 330
Rev/min, 85 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Embodiment 3
A kind of thermally conductive electromagnetic shielding polypropylene material quality component proportion is as follows: 51 parts of pp resin, 5 parts of PE, and 18 parts
Aluminium oxide, 19 parts of diameter 2mm carbon fibers, 0.5 part of 1098,1.5 parts of antioxidant of lubricant, 5 parts of compatilizer.
The thermally conductive electromagnetic shielding material polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 185 DEG C of area's temperature, two area's temperature
201 DEG C, 202 DEG C of three area's temperature, 200 DEG C of four area's temperature, 203 DEG C of five area's temperature, 188 DEG C of head temperature, screw host revolving speed 340
Rev/min, 70 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Embodiment 4
A kind of thermally conductive electromagnetic shielding polypropylene material quality component proportion is as follows: 50 parts of pp resin, 5 parts of PE, and 17 parts
Zinc oxide, the nano-scale carbon nanotube of 21 parts of 40mm, 0.5 part of irgasfos 168,1.5 parts of lubricant, 5 parts of compatilizer.
The thermally conductive electromagnetic shielding material polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 177 DEG C of area's temperature, two area's temperature
197 DEG C, 196 DEG C of three area's temperature, 198 DEG C of four area's temperature, 197 DEG C of five area's temperature, 186 DEG C of head temperature, screw host revolving speed 320
Rev/min, 78 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Embodiment 5
A kind of thermally conductive electromagnetic shielding polypropylene material quality component proportion is as follows: 49 parts of pp resin, 5 parts of PE, and 16 parts
Aluminium nitride, the nanoscale graphite alkene of 23 parts of partial size 10mm, 0.5 part of irgasfos 168 and 1098,1.5 parts of lubricant, 5 parts
Compatilizer.
The thermally conductive electromagnetic shielding material polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 184 DEG C of area's temperature, two area's temperature
204 DEG C, 203 DEG C of three area's temperature, 205 DEG C of four area's temperature, 202 DEG C of five area's temperature, 192 DEG C of head temperature, screw host revolving speed 345
Rev/min, 85 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Embodiment 6
A kind of thermally conductive electromagnetic shielding polypropylene material quality component proportion is as follows: 48 parts of pp resin, 5 parts of PE, and 15 parts
Boron nitride, 25 parts of diameter 4mm carbon fibers, 0.5 part of irgasfos 168 and 2334,1.5 parts of lubricant, 5 parts of compatilizer.
The thermally conductive electromagnetic shielding material polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 185 DEG C of area's temperature, two area's temperature
205 DEG C, 204 DEG C of three area's temperature, 203 DEG C of four area's temperature, 205 DEG C of five area's temperature, 195 DEG C of head temperature, screw host revolving speed 349
Rev/min, 90 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Comparative example 1
A kind of polypropylene material quality component proportion is as follows: 68 parts of pp resin, 5 parts of PE, 20 parts of magnesia are thermally conductive
Agent, 0.5 part of irgasfos 168 and antioxidant 1010,1.5 parts of lubricant, 5 parts of compatilizer.
The polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant, thermal conducting agent is added, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 184 DEG C of area's temperature, two area's temperature
203 DEG C, 205 DEG C of three area's temperature, 202 DEG C of four area's temperature, 204 DEG C of five area's temperature, 192 DEG C of head temperature, screw host revolving speed 350
Rev/min, 86 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Comparative example 2
A kind of polypropylene material quality component proportion is as follows: 73 parts of pp resin, 5 parts of PE, and 15 parts of diameter 25mm's receives
Meter level carbon nanotube conducting agent, 0.5 part of irgasfos 168 and antioxidant 1010,1.5 parts of lubricant, 5 parts of compatilizer.
The polypropylene modified material is prepared as follows:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant, conductive agent is added, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 179 DEG C of area's temperature, two area's temperature
198 DEG C, 199 DEG C of three area's temperature, 196 DEG C of four area's temperature, 197 DEG C of five area's temperature, 187 DEG C of head temperature, screw host revolving speed 315
Rev/min, 76 revs/min of feeding.
E, to extruded material carry out tie rod, cooling, air-dry, pelletizing, be packaged to be finished product.
Product testing
The product prepared to the various embodiments described above and comparative example is tested for the property.Mechanical property is tested by following testing standard
Can, embodiment and comparative example is put into air dry oven at 90 DEG C and is dried 2 hours, the moisture of particle surface is removed, is then infusing
Molding machine is drawn a design.It is 24 hours cooling, then carry out test mechanical property.Testing standard is as follows:
(1) tensile strength standard: ISO527,50mm/min；
(2) bending strength standard: ISO178,2mm/min；
(3) melt index standard: ISO1133,230 DEG C of test condition, 2.16Kg；
(4) thermal coefficient standard: GB22588-2008；
(5) electromagnet shield effect: GB6190-2008；
(6) Izod notched impact strength: ISO180,4mm, 23 DEG C.
Testing result is shown in Table 1
As shown in Table 1, embodiment 1-6 thermal coefficient is in 3.0W/m or more, and electromagnet shield effect can reach 40Db
More than.Pass through the comparison of embodiment 1-6 and comparative example 1, comparative example 2, it is known that thermal conducting agent and lead in product prepared by embodiment
Electric agent is acted synergistically, and thermal conductivity and electromagnetic shielding performance effectively improve.
Product of the invention has good heating conduction and electromagnetic shielding performance, can be applied to electronics and communication apparatus
Equal fields.
Claims (10)
1. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method, it is characterised in that including following weight percent
Component: acrylic resin 40%-60%, toughener 5%-10%, thermal conducting agent 5%-20%, conductive agent 10%-25%, antioxygen
Agent 0.2%-5%, lubricant 0.5%-1%, compatilizer 1%-10%.
2. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In the acrylic resin is the polypropylene of melting means 10-45g/10min.
3. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In the toughener is polyolefin elastomer, PE, Styrene-Butadiene-Styrene Block Copolymer, styrene-isoamyl two
One of alkene-styrene block copolymer.
4. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In the thermal conducting agent, which is that one or more of magnesia, aluminium oxide, zinc oxide, aluminium nitride, boron nitride, silicon carbide are above, to be compared
The combination of example.
5. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In the conductive agent is the nano-scale carbon nanotube of diameter 10-40mm, the nanoscale graphite alkene of partial size 10-15mm, diameter 2-
One of 4mm carbon fiber.
6. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In the antioxidant is one or more of antioxidant 1010, irgasfos 168, antioxidant 3114 and antioxidant 1098.
7. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In the lubricant is one or more of calcium stearate, zinc stearate, double ethylene stearic amides, polyethylene wax.
8. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In the compatilizer is grafting or block copolymer.
9. a kind of according to claim 1, thermally conductive electromagnetic shielding polypropylene composite material and preparation method described in 4,5, special
Sign is, the thermal conducting agent, conductive agent material diameter be 0.1-20 microns.
10. a kind of thermally conductive electromagnetic shielding polypropylene composite material and preparation method according to claim 1, feature exist
In, the preparation method the following steps are included:
A, each raw material is weighed by raw material proportioning；
B, weighed acrylic resin, toughener, compatilizer are uniformly mixed in a high speed mixer；
C, antioxidant, lubricant is added, and conductive agent, thermal conducting agent are added by side feed material, is further uniformly mixed；
D, mixed material is sent to double screw extruder to squeeze out, extrusion temperature are as follows: 180 ± 5 DEG C of area's temperature, two area's temperature
200 ± 5 DEG C, 200 ± 5 DEG C of three area's temperature, 200 ± 5 DEG C of four area's temperature, 200 ± 5 DEG C of five area's temperature, 190 ± 5 DEG C of head temperature,
300-350 revs/min of screw host revolving speed, 70-90 revs/min of feeding.
E, tie rod carried out to the material of extrusion, cooling, air-dry, pelletizing, be packaged to be finished product.
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Cited By (8)
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| CN110452464A (en) * | 2019-09-10 | 2019-11-15 | 中国电子科技集团公司第三十三研究所 | A kind of nano combined electromagnetic shielding material of resin base carbon and preparation method thereof |
| CN110952059A (en) * | 2019-09-04 | 2020-04-03 | 陈淑萍 | Preparation method of corrosion-resistant nuclear shielding material |
| CN111286155A (en) * | 2020-03-27 | 2020-06-16 | 江苏君华特种工程塑料制品有限公司 | Heat-conducting, electromagnetic-shielding and high-strength PEEK composite material and preparation method thereof |
| CN112009055A (en) * | 2020-08-05 | 2020-12-01 | 安徽森泰木塑集团股份有限公司 | Plastic-containing product with low-heat surface and preparation method thereof |
| CN114031857A (en) * | 2021-10-18 | 2022-02-11 | 武汉金发科技有限公司 | Electromagnetic shielding polypropylene composition and preparation method and application thereof |
| CN114644793A (en) * | 2022-03-07 | 2022-06-21 | 江苏金发科技新材料有限公司 | High-toughness electromagnetic shielding polypropylene composite material and preparation method and application thereof |
| CN115477813A (en) * | 2022-11-01 | 2022-12-16 | 飞荣达科技(江苏)有限公司 | PP-based composite material for electromagnetic shielding and preparation method thereof |
| CN115536936A (en) * | 2021-06-30 | 2022-12-30 | 合肥杰事杰新材料股份有限公司 | Conductive polypropylene and preparation method thereof |
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Application publication date: 20181204 |