CN1775502A - Vibration shaping method for neat-conducting insulated plastics - Google Patents
Vibration shaping method for neat-conducting insulated plastics Download PDFInfo
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- CN1775502A CN1775502A CN 200510101699 CN200510101699A CN1775502A CN 1775502 A CN1775502 A CN 1775502A CN 200510101699 CN200510101699 CN 200510101699 CN 200510101699 A CN200510101699 A CN 200510101699A CN 1775502 A CN1775502 A CN 1775502A
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- vibration
- conductive insulated
- insulated plastics
- plastics
- moulded heat
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Abstract
The present invention relates to a vibration forming method for preparing high heat conductivity insulating plastics. Said method includes the following steps: uniformly mixing plastic matrix, filler, coupling agent and lubricating agent to obtain mixture, making the mixture be passed through extruding machine to make granulation to obtain heat-conducting insulating plastics, melting said plastics, injection moulding or cast-moulding, at the same time applying vibration field, cooling and forming.
Description
Technical field
The present invention relates to field of plastics manufacture, be specifically related to a kind of vibration formation method of high heat conductive insulating plastics.
Background technology
Metal material traditional in heat radiation industry is very heavy usually, the machining cost height, and the geometry of goods is very limited and is easy to corrosion, thereby is substituted by the moulded heat-conductive insulated plastics of easy processing and forming more and more.
In the prior art, the polymeric matrix that uses bulk material such as boron nitride particle and laminar filler to fill is arranged, wherein the plastics of filling with laminar filler (high length-diameter ratio at least 10: 1) have heat conductivility (ZL99815810.0) preferably.Yet,, also not necessarily can access high thermal conductivity even good like this material is arranged.Because heat conduction is a kind of overall performance, heat is to conduct in integral body, conducts with the whole volume of object.Therefore, even allow the narrow conduit of height heat conduction pass the much lower object of heat conduction, its heat conduction is also not as the object of uniform heat conduction is so good to a certain extent in whole object.Therefore, the unanimity of composite bodies whole substrate thermal conductivity is vital to whole high-termal conductivity.And high aspect ratio materials and high filled plastics are difficult to obtain evenly filler distribution closely because of the influence of flow regime in the process, make the thermal conductivity of material not reach perfect condition.
Summary of the invention
The invention reside in the vibration formation method that a kind of moulded heat-conductive insulated plastics is provided, improve the thermal conductivity of moulded heat-conductive insulated plastics.
Reach good thermal conductivity, heat filling is reached near perfectly arranging.The present invention is by applying oscillator field, the processing method of carrying out injection moulding or casting mold moulding under given conditions makes that heat filling can both be easy to reach near desirable arrangement in all cases in the moulded heat-conductive insulated plastics, thereby obtains the moulded heat-conductive insulated plastics of high thermal conductivity.
The vibration formation method of moulded heat-conductive insulated plastics of the present invention comprises the steps:
(1) plastic substrate and filler, coupling agent, lubricant mixture obtain moulded heat-conductive insulated plastics by the extruder granulation;
(2) the moulded heat-conductive insulated plastics fusion that step (1) is obtained;
(3) the fusion moulded heat-conductive insulated plastics is carried out injection moulding or casting mold moulding, apply oscillator field simultaneously, filler in the fusion moulded heat-conductive insulated plastics is moved mutually arrange to reach evenly closely;
(4) be cooled to the room temperature typing.
Step (1) can adopt general composition of raw materials and consumption.
Step (2) can adopt method in common to make the moulded heat-conductive insulated plastics fusion.
Step (4) can adopt general cooling and shaping method.
Preferred version of the present invention is as follows:
The described plastic substrate of step (1) is polyphenylene sulfide (PPS), PA, PBT, PP or ABS.
The described filler of step (1) is magnesia (MgO), aluminium oxide (Al
2O
3), one or more mixtures in the aluminium nitride (AlN), hexagonal boron nitride (h-BN), carborundum (SiC).
The described coupling agent of step (1) is silane coupler, titanate coupling agent or aluminate coupling agent.
The described lubricant of step (1) is stearic acid amide, hard acid ester salt, low polymer liquid crystal, boron nitride (BN) or molybdenum bisuphide (MoS
2).
Step (2) is described to be by the injector fusion or place the mould heating and melting with moulded heat-conductive insulated plastics with the moulded heat-conductive insulated plastics fusion.
The vibration pressure of the described oscillator field of step (3) is 1～50MPa, and vibration frequency is 1～15Hz.
The described injection moulding of step (3), injection pressure be 10～100MPa, injection/time of vibration is 1～30 second.
Molding pressure 10～the 50MPa of the described casting mold moulding of step (3), time of vibration 1～60 second.
The present invention's advantage compared with prior art be the present invention by applying oscillator field, high filler of filling in the moulded heat-conductive insulated plastics is reached preferably arranges, improved the thermal conductivity of plastics.
The specific embodiment
Embodiment 1
In high-speed mixer, add aluminium nitride (D
50=22.5 microns) 3.5 kilograms, add silane coupler 30 grams then, then high-speed mixing is even.Add 1.5 kilograms of PPS again, after mixing, be added in the double screw extruder,, get the injection moldable moulded heat-conductive insulated plastics at 280～300 ℃ of extruding pelletizations.
These plastics are injected vibration injection machine after 300 ℃ of plasticizings, at the 50MPa vibration pressure, 1Hz vibration frequency, injection moulding under the 100MPa.About 140 ℃ of mold temperature, injection/time of vibration 1 second, cooling and shaping.Thermal diffusion coefficient is during 50 ℃ of this moulded heat-conductive insulated plastics products: 1.244mm
2/ s, and do not adopt the thermal diffusion coefficient of the injected sample of vibration to be: 1.007mm
2/ s.
Embodiment 2
Add 3.5 kilograms in magnesia and aluminium oxide (40-325 order) in high-speed mixer, add titanate coupling agent 30 grams then, then high-speed mixing is even.Add the PA661.5 kilogram again, after mixing, be added in the double screw extruder,, get the injection moldable moulded heat-conductive insulated plastics at 280 ℃ of left and right sides extruding pelletizations.
These plastics are injected vibration injection machine after 280 ℃ of plasticizings, at the 1MPa vibration pressure, 15Hz vibration frequency, injection moulding under the 10MPa.About 120 ℃ of mold temperature, injection/time of vibration 30 seconds.Thermal diffusion coefficient is during 50 ℃ of this moulded heat-conductive insulated plastics products: 0.951mm
2/ s, and do not adopt the thermal diffusion coefficient of the injected sample of vibration to be: 0.757mm
2/ s.
Embodiment 3
In the mill with 100 gram ABS plasticizings after, progressively add 400 gram hexagonal boron nitride (D
50=22.5 microns), mixing even back slice gets moulded plastic.
This moulded plastic is put into mould, and in 200 ℃ of preheatings 10 minutes, manually alternately pressurization and release alternately vibrated 30 times then on vulcanizing press, and about one minute, pressurize was 10 minutes then.Oil pressure pressure 15MPa, 98 square centimeters of chamber areas.This moulded heat-conductive insulated plastics plate thermal conductivity in the time of about 50 ℃ is: 5.221W/mK (the parallel-plate thermal conductivity tester of proofreading and correct through glass and stainless steel), the sample thermal conductivity of pressurize is after twice pressurization and only adopt: 3.799W/mK (through the parallel-plate thermal conductivity tester of glass with the stainless steel correction).
Embodiment 4
In high-speed mixer, add hexagonal boron nitride (D
50=22.5 microns) 3.5 kilograms, add aluminate coupling agent 30 grams then, then high-speed mixing is even.Add 1 kilogram of 1.5 kilograms of PPS and stearic acid amide again, after mixing, be added in the double screw extruder,, get the injection moldable moulded heat-conductive insulated plastics at 280～300 ℃ of extruding pelletizations.
These plastics are injected vibration injection machine after 300 ℃ of plasticizings, at the 15MPa vibration pressure, 10Hz vibration frequency, the moulding of 100MPa lower mold.About 140 ℃ of mold temperature, time of vibration 60 seconds, cooling and shaping.Thermal diffusion coefficient is during 50 ℃ of this moulded heat-conductive insulated plastics products: 1.344mm
2/ s, and do not adopt the thermal diffusion coefficient of the injected sample of vibration to be: 1.001mm
2/ s.
Embodiment 5
Add 3.5 kilograms in magnesia and aluminium oxide (40-325 order) in high-speed mixer, add titanate coupling agent 30 grams then, then high-speed mixing is even.Add the PA661.5 kilogram again, after mixing, be added in the double screw extruder,, get the injection moldable moulded heat-conductive insulated plastics at 280 ℃ of left and right sides extruding pelletizations.
These plastics are injected vibration injection machine after 280 ℃ of plasticizings, at the 12MPa vibration pressure, 7Hz vibration frequency, the moulding of 50MPa lower mold.About 120 ℃ of mold temperature, time of vibration 1 second.Thermal diffusion coefficient is during 50 ℃ of this moulded heat-conductive insulated plastics products: 0.101mm
2/ s, and do not adopt the thermal diffusion coefficient of the injected sample of vibration to be: 0.757mm
2/ s.
Claims (9)
1, a kind of vibration formation method of moulded heat-conductive insulated plastics is characterized in that comprising the steps:
(1) plastic substrate and filler, coupling agent, lubricant mixture obtain moulded heat-conductive insulated plastics by the extruder granulation;
(2) the moulded heat-conductive insulated plastics fusion that step (1) is obtained;
(3) the fusion moulded heat-conductive insulated plastics is carried out injection moulding or casting mold moulding, apply oscillator field simultaneously;
(4) cooling and shaping.
2, method according to claim 1 is characterized in that the described plastic substrate of step (1) is polyphenylene sulfide (PPS), PA, PBT, PP or ABS.
3, method according to claim 1 and 2 is characterized in that the described filler of step (1) is magnesia (MgO), aluminium oxide (Al
2O
3), one or more mixtures in the aluminium nitride (AlN), hexagonal boron nitride (h-BN), carborundum (SiC).
4, method according to claim 3 is characterized in that the described coupling agent of step (1) is silane coupler, titanate coupling agent or aluminate coupling agent.
5, method according to claim 4 is characterized in that the described lubricant of step (1) is stearic acid amide, hard acid ester salt, low polymer liquid crystal, boron nitride (BN) or molybdenum bisuphide (MoS
2).
6, method according to claim 5, it is characterized in that step (2) described be by the injector fusion or place the mould heating and melting with moulded heat-conductive insulated plastics with the moulded heat-conductive insulated plastics fusion.
7, method according to claim 6 is characterized in that the vibration pressure of the described oscillator field of step (3) is 1～50MPa, and vibration frequency is 1～15Hz.
8, method according to claim 7 is characterized in that the described injection moulding of step (3), injection pressure be 10～100MPa, injection/time of vibration is 1～30 second.
9, method according to claim 7 is characterized in that the molding pressure 10～50MPa of the described casting mold moulding of step (3), time of vibration 1～60 second.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510101699 CN1775502A (en) | 2005-11-25 | 2005-11-25 | Vibration shaping method for neat-conducting insulated plastics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510101699 CN1775502A (en) | 2005-11-25 | 2005-11-25 | Vibration shaping method for neat-conducting insulated plastics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1775502A true CN1775502A (en) | 2006-05-24 |
Family
ID=36765281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510101699 Pending CN1775502A (en) | 2005-11-25 | 2005-11-25 | Vibration shaping method for neat-conducting insulated plastics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103012913A (en) * | 2012-11-21 | 2013-04-03 | 合肥杰事杰新材料股份有限公司 | Heat-conducting and wear-resisting composite material and preparation method thereof |
| CN106079814A (en) * | 2016-06-06 | 2016-11-09 | 陕西生益科技有限公司 | A kind of copper-clad plate lamination method |
-
2005
- 2005-11-25 CN CN 200510101699 patent/CN1775502A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103012913A (en) * | 2012-11-21 | 2013-04-03 | 合肥杰事杰新材料股份有限公司 | Heat-conducting and wear-resisting composite material and preparation method thereof |
| CN106079814A (en) * | 2016-06-06 | 2016-11-09 | 陕西生益科技有限公司 | A kind of copper-clad plate lamination method |
| CN106079814B (en) * | 2016-06-06 | 2018-11-09 | 陕西生益科技有限公司 | A kind of copper-clad plate lamination method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20060524 |