CN103435895B - A kind of method preparing insulation high-heat-conductive composite material - Google Patents
A kind of method preparing insulation high-heat-conductive composite material Download PDFInfo
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- CN103435895B CN103435895B CN201310408997.XA CN201310408997A CN103435895B CN 103435895 B CN103435895 B CN 103435895B CN 201310408997 A CN201310408997 A CN 201310408997A CN 103435895 B CN103435895 B CN 103435895B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/875—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling for achieving a non-uniform temperature distribution, e.g. using barrels having both cooling and heating zones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
- B29C2948/92895—Barrel or housing
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Abstract
The invention discloses a kind of method preparing insulation high-heat-conductive composite material.Its high density polyethylene(HDPE) is matrix, the heat conductive filler of interpolation aluminium nitride, aluminum oxide, boron nitride three kinds of different-grain diameters and processing aid, be dropped in pre-mixing in high mixer in the lump, through twin screw extruder melt blending, extrude, granulation, can obtain granule type insulation high-heat-conductive composite material.The insulation high-heat-conductive composite material that the present invention produces has high thermal conductivity coefficient, good processing fluidity and insulativity, can be applied to extrude, the forming process such as injection, product can meet the requirement of different field to several functions such as macromolecular material insulation, heat conduction, excellent machinabilities, application prospect is good, its production technique is simple, convenient operation and control, steady quality, production efficiency is high, has wide industrialization and market outlook.
Description
Technical field
The present invention relates to a kind of method preparing insulation high-heat-conductive composite material, belong to functional composite material preparing technical field.
Background technology
At electronic technology field, because the degree of integration of electronic circuit is more and more higher, the gathering of heat gets more and more.The gathering of heat causes electronic device temperature to raise, and job stability reduces.Electronic device temperature raises, and the life-span of electron device can sharply decline.Therefore, require that the packaged material being used for electron device has high thermal conductivity, so that heat conducts out rapidly, reach the object of cooling.At space industry, owing to lacking the conduction of heat of air, the Heat Conduction Problems of electron device must be considered.According to CoolPolymers company's site introduce U.S. NASA2005 launch Comet detector on just employ the heat-conducting plastic D3604 developed by the said firm.In addition, the hot electric equipment products of ordinary student, as erasable optical disk, duplicating machine deflector roll etc. also use heat-conducting plastic.Other electron device such as electromagnetic valve, electrical condenser injection encapsulated plastics etc. also must use insulating heat-conductive material.Mostly the research report of the domestic insulating heat-conductive matrix material to different field is insulating heat-conductive tackiness agent, insulating heat-conductive rubber, insulating heat-conductive Embedding Material at present, relatively less to the exploitation of insulating and heat-conducting plastics.For insulating and heat-conducting plastics, usually need high filler loading capacity to reach high heat conduction object, will cause the shock strength of matrix material thus, tensile strength declines rapidly.For keeping the mechanical property of plastics as far as possible, need to reduce filler addition as far as possible.Therefore, be badly in need of a kind of filler content of exploitation relatively low, the insulation highly heat-conductive material that thermal conductivity is higher, realizes plastics composite high performance and functionalization, meets the practice demand of insulating and heat-conducting plastics.
Summary of the invention
For the shortcoming that above-mentioned prior art exists, object of the present invention aims to provide a kind of method preparing the high heat conduction functional composite material that insulate, it is simple that the method possesses technique, convenient operation and control, its functional composite material prepared has does not increase heat conductive filler content, just has the feature of high thermal conductivity simultaneously.
Technology ultimate principle of the present invention is: first, based on mechanism (ShenS, HenryA, TongJ, ZhengR, the ChenG.NatureNanotechnology.2010 of polyethylene crystal tool high thermal conductivity coefficient; 5:251-255.), Crystalline plastics (i.e. high density polyethylene(HDPE)) is selected to be matrix, if select armorphous engineering plastics (as polycarbonate), when amorphous engineering plastics mix with heat conductive filler, do not form more heat conduction network, its reason is: armorphous engineering plastics are as polycarbonate, there is no plastic crystal, then do not exist between plastic crystal and heat conductive filler particle and overlap, then likely interrupt heat conduction network, thermal conductivity can not effectively improve.If select crystalline plastics as high density polyethylene(HDPE), except the thermal conducting path that the overlap joint between filler grain is formed, also there is the thermal conducting path that the overlap joint between filler grain and plastic crystal is formed.Therefore, crystal type polyethylene is selected to form more thermal conducting path.Secondly, the heat conductive filler for different-grain diameter adds in polymeric matrix, can because the difference of heat conductive filler particle diameter, and heat conductivility has obvious difference.The present invention mainly provides the preparation method of insulating heat-conductive matrix material within the scope of a kind of specified particle diameter.Namely be utilize different sorts, the inorganic particulate of different-grain diameter is as composite heat-conducting filler, add in Crystalline plastics (high density polyethylene(HDPE)) matrix, the existence of this compounded mix can form the matrix material having more thermal conducting path than single filler, the heat conduction network formed comprises the network formed between heat conductive filler and heat conductive filler, further comprises the heat conduction network that heat conductive filler-crystal-heat conductive filler is formed, the total addition level of heat conductive filler (addition relative to when only adding a kind of heat conductive filler) when not increasing is made by the interaction of above-mentioned multiple heat conduction network and synergy, the thermal conductivity of matrix material also can be improved significantly.In addition, also can by adding processing aid to regulate mobility and the surface smoothness of insulation high-heat-conductive composite material in the course of processing.
The present invention is based on above-mentioned principle, realizing the technical scheme that foregoing invention object adopts is: the present invention selects high density polyethylene(HDPE) to be matrix, can the high polyethylene of selective freezing degree be matrix to realize high thermal conductivity coefficient, specifically, the present invention prepare insulation high-heat-conductive composite material method comprise the following steps:
The first step, get the raw materials ready by following component and part by weight:
Second step, carries out drying treatment to boron nitride, aluminium nitride, aluminum oxide, and the object of drying treatment is the moisture of removing filler aluminium nitride, boron nitride, and make can not produce bubble in the course of processing, the insulation high-heat-conductive composite material obtained is more closely knit.
3rd step, the boron nitride of above-specified high density polyethylene, processing aid and drying process, aluminium nitride, aluminum oxide are dropped in pre-mixing in high mixer, through twin screw extruder melt blending, extrude, granulation, can obtain granule type insulation high-heat-conductive composite material.
In the above-mentioned the first step, the weight part ratio of high density polyethylene(HDPE), boron nitride, aluminium nitride, aluminum oxide, processing aid can prioritizing selection be 100:25:5:3:1,100:30:5:4:2 or 100:25:1:3:1.
In the above-mentioned the first step, processing aid selects silicone oil lubricant, mainly makes the insulation high-heat-conductive composite material prepared have good surface smoothness.
In above-mentioned 3rd step, the temperature of the charging opening of twin screw extruder, transportation section, melt zone, homogenizing zone, mouth mould is respectively 100 ~ 150 DEG C, 170 ~ 180 DEG C, 170 ~ 180 DEG C, 170 ~ 180 DEG C, 170 ~ 180 DEG C, again after water cooling, pelletizing at convection oven inner drying, namely obtain insulation high-heat-conductive composite material particle.
It is worthy of note, above-mentioned granule type insulation high-heat-conductive composite material can be carried out injection molding, namely obtain the insulation high-heat-conductive composite material of the required shape of user.In this process of injection molding, the temperature of the charging opening of injection moulding machine, transportation section, melt zone, homogenizing zone, nozzle is respectively 50 ~ 60 DEG C, 180 ~ 190 DEG C, 180 ~ 190 DEG C, 180 ~ 190 DEG C, 180 ~ 190 DEG C.The insulation high-heat-conductive composite material obtained by injection molding does not have difference in essence with insulation high-heat-conductive composite material particle, and just shape is different.Thus, the shape that material is different can meet the use to insulation high-heat-conductive composite material under user's varying environment.
The present invention compared with prior art tool has the following advantages:
Existing single filler adds in crystalline polymer matrix as heat conductive filler, the heat conduction network formed is limited, for increasing the number of heat conduction network to a greater extent, the present invention adopts and utilizes particular types, the inorganic particulate of particle diameter is as composite heat-conducting filler, add in crystalline polymer matrix, the existence of this compounded mix can be formed has the matrix material of more thermal conducting path can significantly improve (main heat conduction network comprises the network formed between network and filler-polymer crystals-filler formed between filler and filler) thermal conductivity of material than single filler.Specifically, the present invention adopts the inorganic particulate of particular types, particle diameter as composite heat-conducting filler, and with this composite heat-conducting filler and high density polyethylene(HDPE) melt blending, the insulation high-heat-conductive composite material prepared, the thermal conductivity that its thermal conductivity can reach the pure high density polyethylene(HDPE) of 1.2W/mK(is 0.46W/mK, thermal conductivity adopts HOTDISK test), volume specific resistance reaches 6.71 × 10
12the pure polyethylene 6.93 × 10 of W/cm(
12w/cm).
While insulating heat-conductive matrix material provided by the invention has high thermal conductivity coefficient, can meet and extrude and the requirement of injection molding to polymer processing rheological property, achieve polymeric articles high performance and functionalization, improve the value added of polymeric articles, widen the range of application of polymeric articles, significant in polymer composites theoretical investigation and application and development etc.
Production technique of the present invention is simple, and convenient operation and control, steady quality, production efficiency is high, applied range, has good industrialization and market outlook.
specific implementation method:
By the following examples the present invention is further described specifically.Be necessary to herein means out, below embodiment just further illustrate of the present invention, can not be interpreted as limiting the scope of the invention, person skilled in art can carry out some nonessential improvement and adjustment according to the invention described above content to the present invention.
embodiment 1
The present embodiment prepares the method for insulating heat-conductive matrix material, and the first step prepares raw materials for production by following component and part by weight:
Second step, by boron nitride, aluminum oxide, aluminium nitride 100 DEG C of dryings 6 hours, is then cooled to room temperature.
3rd step, the heat conductive filler handled well above-mentioned, high density polyethylene(HDPE), silicone oil lubricant are together dropped in pre-mixing in high mixer, in twin screw extruder melt blending, extrude, wherein the temperature of forcing machine charging opening, transportation section, melt zone, homogenizing zone, mouth mould is followed successively by 150 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 100 DEG C of dryings 3 hours to be crossed after water cooling, pelletizing in convection oven by the matrix material obtained, and obtain granule type insulation high-heat-conductive composite material.The insulating heat-conductive matrix material obtained, thermal conductivity is 1.27W/mK, and volume specific resistance is 6.82 × 10
12w/cm(and the pure polyethylene of high-density are at the same order of magnitude), the insulating heat-conductive matrix material obtained has good any surface finish and good moulding processability, can be used for extruding, injection moulding.Illustrate: the high mixer in embodiment and twin screw extruder all belong to the conventional machinery in device of plastic processing.
comparative example 1
In above-described embodiment 1, total heat conductive filler addition is 33% of matrix weight, takes the aluminium nitride of corresponding weight in embodiment 1, aluminum oxide, boron nitride respectively, respectively 100 DEG C of dryings 6 hours, is cooled to room temperature.Then, respectively by the above-mentioned heat conductive filler handled well one by one with embodiment 1 in the high density polyethylene(HDPE) of weight, silicone oil lubricant is together dropped in pre-mixing in high mixer, through twin screw extruder extruding pelletization, forcing machine charging opening, transportation section, melt zone, homogenizing zone, the temperature of mouth mould is respectively 150 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, water cooling crossed by the matrix material obtained, 100 DEG C of dryings 3 hours in convection oven after pelletizing, heat-conductive composite material goods are obtained by injection molding, the charging opening of injection moulding machine, transportation section, melt zone, homogenizing zone, the temperature of nozzle is followed successively by 50 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C.The three kinds of insulating heat-conductive matrix materials obtained, its thermal conductivity is respectively 1.13W/mK(35% boron nitride), 0.63W/mK(35% aluminium nitride) 0.52W/mK(35% aluminum oxide), volume specific resistance is respectively 6.99 × 10
12w/cm, 6.76 × 10
12w/cm, 6.88 × 10
12w/cm.By contrast, can find out, the insulating heat-conductive matrix material that embodiment 1 obtains has higher thermal conductivity and good insulativity.
embodiment 2
The present embodiment prepares the method for insulating heat-conductive matrix material, and the first step prepares raw materials for production by following component and part by weight:
Second step, by boron nitride, aluminum oxide, aluminium nitride 100 DEG C of dryings 6 hours, is then cooled to room temperature.
3rd step, the heat conductive filler handled well above-mentioned, high density polyethylene(HDPE), silicone oil lubricant are together dropped in pre-mixing in high mixer, melt blending, extruding pelletization in twin screw extruder, the temperature of the charging opening of forcing machine, transportation section, melt zone, homogenizing zone, mouth mould is followed successively by 150 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, and after the matrix material obtained crosses water cooling, pelletizing, in convection oven, 100 DEG C of dryings obtain granule type insulation high-heat-conductive composite material for 3 hours.Again this granule type insulation high-heat-conductive composite material is passed through injection molding, namely obtain the goods of the insulating heat-conductive matrix material of the required shape of user, the temperature of the charging opening of the injection moulding machine in its process of injection molding, transportation section, melt zone, homogenizing zone, nozzle is followed successively by 50 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C.The insulating heat-conductive matrix material obtained, thermal conductivity is 1.39W/mK, and volume specific resistance is 6.62 × 10
12w/cm(and the pure polyethylene of high-density are at the same order of magnitude), the insulating heat-conductive matrix material obtained has good any surface finish and good moulding processability, can be used for extruding, injection moulding.
comparative example 2
In above-described embodiment 2, total heat conductive filler addition is 39% of matrix weight, takes the aluminium nitride of corresponding weight in embodiment 2, aluminum oxide, boron nitride respectively, respectively 100 DEG C of dryings 6 hours, is cooled to room temperature.Then, respectively by the above-mentioned heat conductive filler handled well one by one with embodiment 2 in the high density polyethylene(HDPE) of weight, silicone oil lubricant is together dropped in pre-mixing in high mixer, through twin screw extruder extruding pelletization, forcing machine charging opening, transportation section, melt zone, homogenizing zone, the temperature of mouth mould is followed successively by 150 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, water cooling crossed by the matrix material obtained, 100 DEG C of dryings 3 hours in convection oven after pelletizing, insulating heat-conductive composite product is obtained by injection molding, the charging opening of injection moulding machine, transportation section, melt zone, homogenizing zone, the temperature of nozzle is followed successively by 50 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C.The three kinds of heat-conductive composite materials obtained, thermal conductivity is respectively 1.28W/mK (39% boron nitride), 0.83W/mK (39% aluminium nitride) 0.68W/mK (39% aluminum oxide), and volume specific resistance is respectively 5.79 × 10
12w/cm, 6.13 × 10
12w/cm, 6.47 × 10
12w/cm.Visible, relative to comparative example 2, the insulating heat-conductive matrix material obtained by embodiment 1 has higher thermal conductivity and good insulativity.
embodiment 3
The present embodiment prepares the method for insulating heat-conductive matrix material, and the first step prepares raw materials for production by following component and part by weight:
Second step, by boron nitride, aluminum oxide, aluminium nitride 100 DEG C of dryings 6 hours, is then cooled to room temperature.
3rd step, the heat conductive filler handled well above-mentioned, high density polyethylene(HDPE), silicone oil lubricant are together dropped in pre-mixing in high mixer, melt blending, extruding pelletization in twin screw extruder, the temperature of its forcing machine charging opening, transportation section, melt zone, homogenizing zone, mouth mould is followed successively by 150 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 100 DEG C of dryings 3 hours to be crossed after water cooling, pelletizing in convection oven by the matrix material obtained, and obtain granule type insulation high-heat-conductive composite material.This granule type insulation high-heat-conductive composite material is obtained the insulating heat-conductive composite product of the required shape of user by injection molding, the temperature of the charging opening of the injection moulding machine in its process of injection molding, transportation section, melt zone, homogenizing zone, nozzle is followed successively by 50 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C again.The insulating heat-conductive matrix material obtained, thermal conductivity is 1.15W/mK, and volume specific resistance is 5.73 × 10
12w/cm(and the pure polyethylene of high-density are at the same order of magnitude), the insulating heat-conductive matrix material obtained has good any surface finish and good moulding processability, can be used for extruding, injection moulding.
comparative example 3
In above-described embodiment 3, total heat conductive filler addition is 29% of matrix weight, and in another name Example 3, aluminium nitride, aluminum oxide, the boron nitride of corresponding weight, respectively 100 DEG C of dryings 6 hours, be then cooled to room temperature.Then, respectively by the above-mentioned heat conductive filler handled well one by one with embodiment 3 in the high density polyethylene(HDPE) of weight, silicone oil lubricant is together dropped in pre-mixing in high mixer, through twin screw extruder extruding pelletization, forcing machine charging opening, transportation section, melt zone, homogenizing zone, the temperature of mouth mould is followed successively by 150 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, water cooling crossed by the matrix material obtained, 100 DEG C of dryings 3 hours in convection oven after pelletizing, heat-conductive composite material goods are obtained by injection molding, the charging opening of injection moulding machine, transportation section, melt zone, homogenizing zone, the temperature of nozzle is followed successively by 50 DEG C, 190 DEG C, 190 DEG C, 190 DEG C, 190 DEG C.The three kinds of insulating heat-conductive matrix materials obtained, thermal conductivity is respectively 0.96W/mK(29% boron nitride), 0.61W/mK(29% aluminium nitride) 0.50W/mK(29% aluminum oxide), volume specific resistance is respectively 7.11 × 10
12w/cm, 6.66 × 10
12w/cm, 6.89 × 10
12w/cm.Visible, the insulating heat-conductive matrix material obtained by embodiment 3 has higher thermal conductivity and good insulativity.
embodiment 4
The present embodiment prepares the method for insulating heat-conductive matrix material, and the first step prepares raw materials for production by following component and part by weight:
Second step, by boron nitride, aluminum oxide, aluminium nitride 100 DEG C of dryings 6 hours, is then cooled to room temperature.
3rd step, the heat conductive filler handled well above-mentioned, high density polyethylene(HDPE), silicone oil lubricant are together dropped in pre-mixing in high mixer, in twin screw extruder melt blending, extrude, wherein the temperature of forcing machine charging opening, transportation section, melt zone, homogenizing zone, mouth mould is followed successively by 150 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 180 DEG C, 100 DEG C of dryings 3 hours to be crossed after water cooling, pelletizing in convection oven by the matrix material obtained, and obtain granule type insulation high-heat-conductive composite material.The insulating heat-conductive matrix material obtained, thermal conductivity is 1.25W/mK, and volume specific resistance is 6.88 × 10
12w/cm(and the pure polyethylene of high-density are at the same order of magnitude), the moulding processability that the insulating heat-conductive matrix material obtained is good, can be used for extruding, injection moulding.
Claims (5)
1. prepare a method for insulation high-heat-conductive composite material, it is characterized in that this preparation method comprises the following steps:
The first step, get the raw materials ready by following component and weight:
Second step, carries out drying treatment to boron nitride, aluminium nitride, aluminum oxide;
3rd step, the boron nitride of above-specified high density polyethylene, silicone oil lubricant and drying process, aluminium nitride, aluminum oxide are dropped in pre-mixing in high mixer, through twin screw extruder melt blending, extrude, granulation, can obtain granule type insulation high-heat-conductive composite material.
2. the method preparing insulation high-heat-conductive composite material according to claim 1, it is characterized in that in a first step, the weight part ratio of high density polyethylene(HDPE), boron nitride, aluminium nitride, aluminum oxide, silicone oil lubricant is 100:25:5:3:1.
3. the method preparing insulation high-heat-conductive composite material according to claim 1, it is characterized in that in a first step, the weight part ratio of high density polyethylene(HDPE), boron nitride, aluminium nitride, aluminum oxide, silicone oil lubricant is 100:30:5:4:2.
4. the method preparing insulation high-heat-conductive composite material according to claim 1, it is characterized in that in a first step, the weight part ratio of high density polyethylene(HDPE), boron nitride, aluminium nitride, aluminum oxide, silicone oil lubricant is 100:25:1:3:1.
5. the method preparing insulation high-heat-conductive composite material according to claim 1, is characterized in that corpuscular insulation high-heat-conductive composite material to carry out injection molding, namely obtains injection molding insulation high-heat-conductive composite material.
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| CN108215050A (en) * | 2017-12-26 | 2018-06-29 | 齐齐哈尔大学 | A kind of anticorrosive HDPE heating piece preparation method of lightweight |
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