CN103467952A - Continuous long conductive fiber filled electromagnetic shielding composite material and preparation method thereof - Google Patents
Continuous long conductive fiber filled electromagnetic shielding composite material and preparation method thereof Download PDFInfo
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- CN103467952A CN103467952A CN2012101835146A CN201210183514A CN103467952A CN 103467952 A CN103467952 A CN 103467952A CN 2012101835146 A CN2012101835146 A CN 2012101835146A CN 201210183514 A CN201210183514 A CN 201210183514A CN 103467952 A CN103467952 A CN 103467952A
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Abstract
The invention discloses a continuous long conductive fiber filled electromagnetic shielding composite material. The material comprises the following components by weight: 64-88 parts of a thermoplastic resin, 10-33 parts of continuous conductive fibers, 0.5-0.7 part of an antioxidant, 0.3-0.5 part of a lubricant. The invention also discloses a preparation method of the above continuous long conductive fiber filled electromagnetic shielding composite material. Compared with a short fiber or conductive filler filled thermoplastic resin, the continuous long conductive fiber filled thermoplastic resin adopted by the invention requires less long conductive fibers to reach a same shielding effect, and has cost advantage; at the same time, the continuous long conductive fiber material provided by the invention has certain enhancement effect on the mechanical properties of material, and a small filling amount can maintain good mechanical properties of the material.
Description
Technical field
The present invention relates to a kind of functional high-polymer matrix material, particularly a kind of continuous long electro-conductive fiber is filled electromagnetic shielding composite material and preparation method thereof.
Background technology
Electromagnetic shielding refers to two area of space is carried out to the isolation of metal, is used for controlling the interference to another zone of electric field, magnetic field or the electromagnetic field in a zone.Electromagnetic shielding is a kind of measure of electromagnetic compatibility technology, for adopting electromagnetic shielding material that electromagnetic interference source is closed, make external electromagnetic intensity lower than permissible value, or electromagnetic sensor is closed with electromagnetic shielding material, make the measure of its internal electromagnetic intensity lower than permissible value.
Along with scientific and technological development, various electronic and electrical equipments are used in a large number, and the incompatible work that not only can affect electronics of the electromagnetic interference that various hertzian wave cause and electromagnetism, also pollute the environment, harm humans health.Traditional electromagnetic shielding material is metallic substance, and the shield effectiveness of the electromagnetic shielding equipment that metallic substance is made is good, but be difficult to be processed into complicated shape, and metal itself in addition corrosion-resistant, than the shortcoming such as great.
Thermoplastic resin has superior processibility and plasticity, so be widely used in various business automation equipments and electronic and electrical equipment, but it does not generally have effectiveness, by adding the electromagnetism filler such as the conducting material such as steel fiber, metal powder, carbon dust or the magnetic metal oxide of tool etc. can give matrix material certain capability of electromagnetic shielding.For example Chinese patent CN201010194957 discloses a kind of polyphenylene sulfide and polyamide alloy electromagnetic shielding material and preparation method thereof, Chinese patent CN200910176507 discloses a kind of ABS matrix material with electro-magnetic screen function, and Chinese patent CN200680056752 discloses a kind of electromagnetic shielding material with Stainless Steel Fibre and the composite filled polyester of carbon nanotube.Above-mentioned patent is all to adopt electromagnetic shielding filler is mixed to the matrix material that the method for extruding obtains having electro-magnetic screen function with resin through twin screw, but all has the more problem of filling adding amount.
Summary of the invention
The first purpose of the present invention is to provide a kind of continuous long electro-conductive fiber and fills electromagnetic shielding composite material, because macrofiber can still keep longer length after injection moulding, and can mutually overlap the three-dimensional continuous structure of formation, just can reach effectiveness preferably with less loading level, macrofiber also has certain enhancement to the mechanical property of material simultaneously.
The second purpose of the present invention is to provide the preparation method that above-mentioned continuous long electro-conductive fiber is filled electromagnetic shielding composite material.
Technical scheme of the present invention is as follows:
A kind of continuous long electro-conductive fiber is filled electromagnetic shielding composite material, by the component that comprises following weight part, is made:
64 ~ 88 parts of thermoplastic resins;
Long electro-conductive fiber is 10 ~ 33 parts continuously;
0.5 ~ 0.7 part, oxidation inhibitor;
0.3 ~ 0.5 part of lubricant;
1.2 ~ 2 parts of toughner.
Preferably, described thermoplastic resin is selected from one or several the alloy in polycarbonate (PC), acrylonitrile-butadiene-styrene (ABS) segmented copolymer (ABS).
Preferably, described continuous long electro-conductive fiber is selected from continuous long carbon fiber or long Stainless Steel Fibre continuously, is preferably continuous long Stainless Steel Fibre.
Preferably, the compound that described oxidation inhibitor is Hinered phenols primary antioxidant and phosphorous acid esters auxiliary antioxidant.
Preferably, described oxidation inhibitor is β-(3, the 5-di-tert-butyl-hydroxy phenyl) positive octadecanol ester (antioxidant 1076) primary antioxidant of propionic acid and three ［ 2.4-di-tert-butyl-phenyl ］ phosphorous acid esters (irgasfos 168) or 4,4'-[1, the 1'-xenyl] compound of subunit di 2 ethylhexyl phosphonic acid-tetra-[2,4-, bis-trimethylphenylmethane bases] ester (oxidation inhibitor PEPQ) auxiliary antioxidant.
Preferably, described lubricant is selected from silicone, N, one or more in N '-ethylene bis stearamide (EBS) or polyethylene wax.
Preferably, described lubricant is the ethylene-acrylic acid copolymer in polyethylene wax.
Preferably, described toughner is maleic anhydride grafted ABS (ABS-G).
The present invention also provides a kind of above-mentioned continuous long electro-conductive fiber to fill the preparation method of electromagnetic shielding composite material, comprises the steps:
(1) mixing of each component: 64 ~ 88 weight part thermoplastic resins, 0.5 ~ 0.7 weight part oxidation inhibitor, 0.3 ~ 0.5 weight part lubricant, 1.2 ~ 2 weight part toughner are mixed to get to mixture in high-speed mixer;
(2) melting of mixture and compound with fiber: step (1) gained mixture is added to the abundant melting mixing of twin screw extruder, and melt is imported in dipping systems by twin screw extruder; Multiply long electro-conductive fiber continuously becomes thigh to enter in dipping systems by the macrofiber access road, and fiber is fully flooded by resin melt in dipping systems, and eliminates internal stress through Overheating Treatment;
(3) pelletizing of matrix material: draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material.
Preferably, described step (1) also comprises before, and described thermoplastic resin is carried out to drying;
In described step (2), dipping systems is the dipping melt tank.
Compared with prior art, beneficial effect of the present invention is as follows:
(1) the present invention adopts continuous long electro-conductive fiber filling thermoplastic resin, with staple fibre or conductive filler material filling thermoplastic resin, compares, and the content that reaches the required long electro-conductive fiber of same shield effectiveness is less, has cost advantage;
(2) continuous long electro-conductive fiber of the present invention has certain enhancement to the mechanical property of material, adopts less loading level just can make material keep mechanical property preferably.
Embodiment
Below in conjunction with specific embodiment, further set forth the present invention.Should be appreciated that, these embodiment are only for the present invention is described, and are not intended to limit the scope of the invention.The technician makes according to the present invention in actual applications improvement and adjustment, still belong to protection scope of the present invention.In following examples institute with lubricator A-C540A is purchased from Honeywell, dipping systems is selected the dipping melt tank, but herein for limiting.
Embodiment 1
The continuous long electro-conductive fiber of the present embodiment is filled electromagnetic shielding composite material, by weight, following component, consists of:
88 parts of PC
Long Stainless Steel Fibre is 10 parts continuously
0.2 part of antioxidant 1076
0.5 part of oxidation inhibitor PEPQ
0.3 part of lubricant A-C540A
1.2 parts of toughner ABS-G
The preparation method that the continuous long electro-conductive fiber of the present embodiment is filled electromagnetic shielding composite material is as follows:
First by 88 parts of PC dry 8 h under 100 ℃;
1) dried PC is mixed under room temperature and within 15 minutes, obtains mixture with 0.2 part of antioxidant 1076,0.5 part of oxidation inhibitor PEPQ, 0.3 part of lubricant A-C540A and 1.2 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 210 ~ 230 ℃, 220 ~ 240 ℃, 230 ~ 250 ℃, 240 ~ 260 ℃, 240 ~ 260 ℃, head is 240 ~ 260 ℃, and melt enters into the dipping melt tank by twin screw extruder; Multiply long Stainless Steel Fibre continuously becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 255 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.The performance of this composite sample is in Table 1.
Embodiment 2
The continuous long electro-conductive fiber of the present embodiment is filled electromagnetic shielding composite material, by weight, following component, consists of:
30 parts of PC
50 parts of ABS
Long Stainless Steel Fibre is 18 parts continuously
0.2 part of antioxidant 1076
0.4 part of oxidation inhibitor PEPQ
0.4 part of lubricant A-C540A
1.4 parts of toughner ABS-G
The preparation method of the electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled is as follows:
First by 30 parts of PC dry 8 h under 100 ℃, 50 parts of ABS dry 4 h under 80 ℃;
1) dried PC and ABS are mixed under room temperature and within 15 minutes, obtain mixture with 0.2 part of antioxidant 1076,0.4 part of oxidation inhibitor PEPQ, 0.4 part of lubricant A-C540A and 1.4 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 190 ~ 210 ℃, 200 ~ 220 ℃, 210 ~ 230 ℃, 220 ~ 240 ℃, 230 ~ 250 ℃, head is 240 ~ 260 ℃, and melt enters into the dipping melt tank by twin screw extruder; Multiply long Stainless Steel Fibre continuously becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 240 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.The performance of this composite sample is in Table 1.
Embodiment 3
The electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled by weight, is comprised of following component:
73 parts of ABS
Long Stainless Steel Fibre is 25 parts continuously
0.2 part of antioxidant 1076
0.3 part of oxidation inhibitor PEPQ
0.4 part of lubricant A-C540A
1.6 parts of toughner ABS-G
The preparation method of the electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled is as follows:
First by 73 parts of ABS dry 4 h under 100 ℃;
1) dried ABS is mixed under room temperature and within 15 minutes, obtains mixture with 0.2 part of antioxidant 1076,0.3 part of oxidation inhibitor PEPQ, 0.4 part of lubricant A-C540A and 1.6 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 170 ~ 190 ℃, 180 ~ 200 ℃, 190 ~ 210 ℃, 200 ~ 220 ℃, 210 ~ 230 ℃, head is 210 ~ 230 ℃, and melt enters into the dipping melt tank by twin screw extruder; Multiply long Stainless Steel Fibre continuously becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 220 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.The performance of this composite sample is in Table 1.
Embodiment 4
The electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled by weight, is comprised of following component:
83 parts of PC
15 parts of continuous long carbon fibers
0.2 part of antioxidant 1076
0.5 part of oxidation inhibitor PEPQ
0.3 part of lubricant A-C540A
1.2 parts of toughner ABS-G
The preparation method of the electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled is as follows: first by 83 parts of PC dry 8 h under 100 ℃;
1) dried PC is mixed under room temperature and within 15 minutes, obtains mixture with 0.2 part of antioxidant 1076,0.5 part of oxidation inhibitor PEPQ, 0.3 part of lubricant A-C540A and 1.2 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 210 ~ 230 ℃, 220 ~ 240 ℃, 230 ~ 250 ℃, 240 ~ 260 ℃, 240 ~ 260 ℃, head is 240 ~ 260 ℃, and melt enters into the dipping melt tank by twin screw extruder; The multiply continuous long carbon fiber becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 255 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.The performance of this composite sample is in Table 1.
Embodiment 5
The electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled by weight, is comprised of following component:
20 parts of PC
53 parts of ABS
25 parts of continuous long carbon fibers
0.2 part of antioxidant 1076
0.4 part of oxidation inhibitor PEPQ
0.5 part of lubricant A-C540A
1.8 parts of toughner ABS-G
The preparation method of the electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled is as follows:
First by 20 parts of PC dry 8 h under 100 ℃, 53 parts of ABS dry 4h under 80 ℃;
1), by dried PC, ABS mixes under room temperature and within 15 minutes, obtains mixture with 0.2 part of antioxidant 1076,0.4 part of oxidation inhibitor PEPQ, 0.5 part of lubricant A-C540A and 1.8 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 190 ~ 210 ℃, 200 ~ 220 ℃, 210 ~ 230 ℃, 220 ~ 240 ℃, 230 ~ 250 ℃, head is 240 ~ 260 ℃, and melt enters into the dipping melt tank by twin screw extruder; The multiply continuous long carbon fiber becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 240 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.The performance of this composite sample is in Table 1.
Embodiment 6
The electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled by weight, is comprised of following component:
64 parts of ABS
33 parts of continuous long carbon fibers
0.2 part of antioxidant 1076
0.4 part of oxidation inhibitor PEPQ
0.5 part of lubricant A-C540A
2.0 parts of toughner ABS-G
The preparation method of the electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled is as follows:
First by 64 parts of ABS dry 4 h under 80 ℃;
1) dried ABS is mixed under room temperature and within 15 minutes, obtains mixture with 0.2 part of antioxidant 1076,0.4 part of oxidation inhibitor PEPQ, 0.5 part of lubricant A-C540A and 2.0 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 170 ~ 190 ℃, 180 ~ 200 ℃, 190 ~ 210 ℃, 200 ~ 220 ℃, 210 ~ 230 ℃, head is 210 ~ 230 ℃, and melt enters into the dipping melt tank by twin screw extruder; The multiply continuous long carbon fiber becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 220 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.The performance of this composite sample is in Table 1.
Table 1
From top data, add a small amount of continuous long electro-conductive fiber just can obtain having the material of better effectiveness, so the present invention have cost advantage; The continuous long electro-conductive fiber that the present invention simultaneously selects has certain enhancement to the mechanical property of matrix material.Compared with prior art, the present invention selects a small amount of continuous long electro-conductive fiber can reach the mechanical property of shield effectiveness and enhancing preferably, has obvious progress.
Embodiment 7
The electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled by weight, is comprised of following component:
64 parts of ABS
33 parts of continuous long carbon fibers
0.2 part of antioxidant 1076
0.4 part of irgasfos 168
0.5 part of lubricant silicone
2.0 parts of toughner ABS-G
The preparation method of the electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled is as follows:
First by 64 parts of ABS dry 4 h under 80 ℃;
1) dried ABS is mixed under room temperature and within 15 minutes, obtains mixture with 0.2 part of antioxidant 1076,0.4 part of irgasfos 168,0.5 part of lubricant silicone and 2.0 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 170 ~ 190 ℃, 180 ~ 200 ℃, 190 ~ 210 ℃, 200 ~ 220 ℃, 210 ~ 230 ℃, head is 210 ~ 230 ℃, and melt enters into the dipping melt tank by twin screw extruder; The multiply continuous long carbon fiber becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 220 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.
Embodiment 8
The electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled by weight, is comprised of following component:
64 parts of ABS
33 parts of continuous long carbon fibers
0.2 part of antioxidant 1076
0.4 part of oxidation inhibitor PEPQ
0.5 part of Lubricate EBS
2.0 parts of toughner ABS-G
The preparation method of the electromagnetic shielding composite material that the continuous long electro-conductive fiber of the present embodiment is filled is as follows:
First by 64 parts of ABS dry 4 h under 80 ℃;
1) dried ABS is mixed under room temperature and within 15 minutes, obtains mixture with 0.2 part of antioxidant 1076,0.4 part of oxidation inhibitor PEPQ, 0.5 part of Lubricate EBS and 2.0 parts of toughner ABS-G in high-speed mixer;
2) step (1) gained mixture is joined to abundant melting mixing in twin screw extruder, screw rod 1 ~ 6 district's temperature is respectively 150 ~ 170 ℃, 170 ~ 190 ℃, 180 ~ 200 ℃, 190 ~ 210 ℃, 200 ~ 220 ℃, 210 ~ 230 ℃, head is 210 ~ 230 ℃, and melt enters into the dipping melt tank by twin screw extruder; The multiply continuous long carbon fiber becomes thigh to enter in the dipping melt tank by the macrofiber access road, and the Temperature Setting of dipping melt tank mould is at 220 ℃, and fiber is fully flooded by resin melt in the dipping melt tank, and eliminates internal stress through Overheating Treatment;
3) draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material, and can control fibre content by the rate of feeding of controlling pulling speed and forcing machine.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. one kind continuously long electro-conductive fiber is filled electromagnetic shielding composite material, it is characterized in that, by the component that comprises following weight part, is made:
64 ~ 88 parts of thermoplastic resins;
Long electro-conductive fiber is 10 ~ 33 parts continuously;
0.5 ~ 0.7 part, oxidation inhibitor;
0.3 ~ 0.5 part of lubricant;
1.2 ~ 2 parts of toughner.
2. continuous long electro-conductive fiber according to claim 1 is filled electromagnetic shielding composite material, it is characterized in that, described thermoplastic resin is selected from one or several the alloy in polycarbonate, acrylonitrile-butadiene-styrene (ABS) segmented copolymer.
3. continuous long electro-conductive fiber according to claim 1 is filled electromagnetic shielding composite material, it is characterized in that, described continuous long electro-conductive fiber is selected from continuous long carbon fiber or long Stainless Steel Fibre continuously.
4. continuous long electro-conductive fiber according to claim 1 is filled electromagnetic shielding composite material, it is characterized in that the compound that described oxidation inhibitor is Hinered phenols primary antioxidant and phosphorous acid esters auxiliary antioxidant.
5. continuous long electro-conductive fiber according to claim 4 is filled electromagnetic shielding composite material, it is characterized in that, described oxidation inhibitor is β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic acid positive octadecanol ester primary antioxidant and three ［ 2.4-di-tert-butyl-phenyl ］ phosphorous acid ester or 4,4'-[1, the 1'-xenyl] compound of subunit di 2 ethylhexyl phosphonic acid-tetra-[2,4-, bis-trimethylphenylmethane bases] ester auxiliary antioxidant.
6. continuous long electro-conductive fiber according to claim 1 is filled electromagnetic shielding composite material, it is characterized in that, described lubricant is selected from silicone, N, one or more in N '-ethylene bis stearamide or polyethylene wax.
7. continuous long electro-conductive fiber according to claim 6 is filled electromagnetic shielding composite material, it is characterized in that, described lubricant is the ethylene-acrylic acid copolymer in polyethylene wax.
8. continuous long electro-conductive fiber according to claim 1 is filled electromagnetic shielding composite material, it is characterized in that, described toughner is maleic anhydride grafted ABS.
9. the preparation method of a continuous long electro-conductive fiber filling electromagnetic shielding composite material as described as any one in claim 1 ~ 8, is characterized in that, comprises the steps:
(1) mixing of each component: 64 ~ 88 weight part thermoplastic resins, 0.5 ~ 0.7 weight part oxidation inhibitor, 0.3 ~ 0.5 weight part lubricant, 1.2 ~ 2 weight part toughner are mixed to get to mixture in high-speed mixer;
(2) melting of mixture and compound with fiber: step (1) gained mixture is added to the abundant melting mixing of twin screw extruder, and melt is imported in dipping systems by twin screw extruder; Multiply long electro-conductive fiber continuously becomes thigh to enter in dipping systems by the macrofiber access road, and fiber is fully flooded by resin melt in dipping systems, and eliminates internal stress through Overheating Treatment;
(3) pelletizing of matrix material: draw and pelletizing through tractor through dipping and heat treated continuous long electro-conductive fiber/resin composite materials, obtain electromagnetic shielding composite material.
10. preparation method according to claim 9, is characterized in that, described step (1) also comprises before, and described thermoplastic resin is carried out to drying;
In described step (2), dipping systems is the dipping melt tank.
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| CN104356585A (en) * | 2014-11-05 | 2015-02-18 | 上海交通大学 | High-performance continuous carbon fiber reinforced ABS composite material and preparation method thereof |
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| CN106883574A (en) * | 2015-12-15 | 2017-06-23 | 上海杰事杰新材料(集团)股份有限公司 | High tenacity electromagnetic shielding makrolon material and its preparation method and application |
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| CN111037776A (en) * | 2018-10-15 | 2020-04-21 | 中广核高新核材科技（苏州）有限公司 | Preparation method of broadband electromagnetic shielding composite material |
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