CN102604219B - The preparation method of high heat conduction inorganic matter thermoplastification compositions and the thermal component manufactured by the method - Google Patents
The preparation method of high heat conduction inorganic matter thermoplastification compositions and the thermal component manufactured by the method Download PDFInfo
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Abstract
The preparation method that the invention discloses high heat conduction inorganic matter thermoplastification compositions and the thermal component manufactured by the method, its high heat conduction inorganic matter thermoplastification compositions is made up of plastics and the function additive that component C is 2～20wt% of one or more tool well processed characteristics that one or more tool inorganic matters of high thermal conductivity that component A is 51～88wt%, component B are 10～38wt%, and its preparation method is: 1) component A configured and component B are dried；2) carry out mixing or preprocessing after banburying by dried component A, B, C, make initial material；3) the initial material feeding extruder will made, threadiness heat conduction inorganic matter is modified processing by the addition of side feeding, porous dies is extruded into bar；4) material being extruded into bar being carried out die face cutting or tie rod cooling and dicing, make high heat conduction inorganic matter thermoplastification compositions, the present invention had both ensured normal service life and the service behaviour of the chip of electric equipment products, more reduce production cost.
Description
Technical field
The present invention relates to electronic apparatus heat sink material technical field, more specifically, the present invention relates to a kind of inorganic particle based on tool high thermal conductivity and fiber thereof, composite thermoplastic plastic cement and function additive make inorganic matter have thermoplasticity, thus are configured to the manufacture method of high heat conduction inorganic matter thermoplastification compositions and the thermal component manufactured by the method.
Background technology
LED(Light Emitting Diode, light emitting diode) Related product is considered one of following staple product of impact, particularly LED lamp illumination has major contribution in energy-conserving and environment-protective, but heat radiation is to limit LED lamp illumination intensity and a principal element in life-span.LED lamp is higher by 80% than traditional electric filament lamp efficiency, but its assembly and drive circuit heat dissipation capacity are the biggest.If these heats do not have suitable emitting, the luminescence of LED lamp and life-span will drastically decline.
Existing traditional LED heat sink material is based on metallic aluminium, copper, these materials have high-termal conductivity, high mechanical properties, can also be processed meeting the requirement of difformity radiator by modes such as plating, molding or cuttings, but the multiple different machine of the expensive needs of its processing difficulties or the mould of costliness, after the most produced rim charge or finished product use, recovery process complexity even cannot reclaim use.
Heat sink material 1500W/m.k～2500W/m.k that in nature heat sink material system, diamond is best is that other materials is incomparable, but unique shortcoming is expensive cannot to popularize, next to that graphite material can substitute for other heat sink materials in heat radiation system, it is only second to CVD(Chemical Vapor Deposition chemical gaseous phase deposition) thermal conductivity coefficient of diamond up to 400W/m.k～1500W/m.k, than the metal object such as gold, silver, copper, there is higher heat radiation advantage.So similar these nonmetallic materials or metallic compound or its fiber heat conductivity, not only equal to traditional heat sink material metallic aluminium, copper etc., and there is again traditional heat sink material metallic aluminium, the low price that copper is incomparable, it it is exactly processing difficulties, bad mechanical strength, if through our these nonmetallic materials of many experiments, metallic compound or its fiber are after making special hybrid process with a small amount of macromolecule resin (plastic cement), not only it is also equipped with superior heat conductivity, but also give its thermoplastification characteristic thus reach can low cost injection molding, mechanical strength is also improved to meet the use requirement as LED heat radiation part material simultaneously.
So, the present invention not only provides a kind of material as heat radiation part, also for the LED lamp of large-scale promotion providing a method reducing production cost because single lamp price is high relative to traditional electricity-saving, electric filament lamp.
Summary of the invention
It is an object of the invention to overcome weak point of the prior art to provide a kind of high heat conduction inorganic matter thermoplastification compositions and processing technology thereof, it is broken existing plastic cement and adds the thinking limitation of conductive powder, break through conventional plastic cement and add the present situation that the heat conductivity of conductive powder is poorer than metallic aluminium, copper, the heat that this material produces when can effectively derive the various electric equipment products work of LED class, ensure that normal service life and the service behaviour of the chip of the various electric equipment products of LED class, more reduce production cost.
For achieving the above object, the present invention adopts the following technical scheme that:
The preparation method of high heat conduction inorganic matter thermoplastification compositions, described high heat conduction inorganic matter thermoplastification compositions is made up of the component of following weight ratio:
Component A, this component A is 51～88wt%(wight, and wt refers to mass percent, i.e. refers to that mass percent is 51～88%) the inorganic matter of one or more tool high thermal conductivities；
Component B, this component B is the plastics of one or more tool well processed characteristics of 10～38wt%；
Component C, this component C is the function additive of 2～20wt%, and this function additive is high molecular polymer；
Its preparation method is as follows:
1) component A configured is dried 2～8 hours with 90～160 DEG C in drying machine, component B configured is dried 2～8 hours with 90～120 DEG C in another drying machine simultaneously；
2) carry out mixing or banburying by powder body in dried component A, B, C and granular substance, preprocessing 5～30 minutes, make initial material；
3) the initial material feeding extruder will made, threadiness heat conduction inorganic matter is modified processing by the addition of side feeding, porous dies is extruded into bar；
4) material being extruded into bar is carried out die face cutting or tie rod cooling and dicing, make high heat conduction inorganic matter thermoplastification compositions.
Wherein, the inorganic matter of one or more tool high thermal conductivities during component A comprises carbon and carbon compound or its fiber, aluminum and aluminum compound or its fiber, zinc compound or its fiber, boron compound or its fiber.
Further, component A comprise graphite, carbon dust, carborundum, aluminium powder, aluminium oxide, aluminium nitride, zinc oxide, ceramics, boron nitride one or more tool high thermal conductivities inorganic matter.
Further, component A is made up of the inorganic matter of the tool high thermal conductivity that one or more length to height ratios are 10～1000 of the tool inorganic matter of high thermal conductivity, 10～the 40wt% that one or more length to height ratios are 1000～7000 of the tool inorganic matter of high thermal conductivity, 10～the 60wt% that one or more length to height ratios (length/height) of 30～70wt% are 7000～100000.
Wherein, component B be polypropylene, polyethylene, polystyrene, polyester, polyamide, polyphenylene sulfide, polyphenylene oxide, Merlon, ABS, LCP or high-temperature nylon one or more tool well processed characteristics plastics.
Wherein, component C comprises give antioxidant that component A and component B have processing forming and lubricant, imparting component A and component B have high-performance coupling compatibility agent and imparting component A and component B has the fire retardant of anti-flammability.
nullFurther，Antioxidant packages in component C contains one or more compounds in Hinered phenols antioxidant or phosphite ester kind antioxidant，This Hinered phenols antioxidant is four [methyl-β-(3,5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester [antioxidant 1010]、N，N '-hexamethyl double (3，5-di-t-butyl-4-hydroxy benzenes propionic acid amide. [antioxidant 1098] or the double-3-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl of 2,2'-ethylenedioxybis(ethanol) .) acrylate [antioxidant 245]，This phosphite ester kind antioxidant is tricresyl phosphite (2，4-di-tert-butyl-phenyl) ester [irgasfos 168]、The double diphosphorous acid two (2 of tetramethylolmethane，4-di-tert-butyl-phenyl) ester [antioxidant 626] or four (2，4-di-tert-butyl-phenyl-4，4 '-xenyl) biphosphonate [antioxidant P-EPQ].
Yet further, one or more compounds during the lubricant in component C includes stearic amide or stearate, Tissuemat E or polypropylene wax or its oxide, oleamide.
Yet further, the coupling compatibility agent in component C includes one or more compounds in silanes, titanate ester or aluminate, maleic anhydride grafts.
Further, one or more compounds during the fire retardant in component C includes Phosphorus, nitrogen class, halogen or antimonide.
Use the thermal component that above-mentioned preparation method manufactures, described prepared high heat conduction inorganic matter thermoplastification compositions is become by mold injection molding the thermal component of electric equipment products.
The inorganic matter of the tool high thermal conductivity of component A as mentioned above, the heat conduction thing using different length to height ratio carries out compounding and that length to height ratio is big heat conduction thing ratio in the 30% leading passage of heat formed above, thus ensure that mixed material is dominated the passage of heat and can efficiently be conducted heat, and smaller two the heat conduction thing that grows tall fills out the various sizes of gap between the leading passage of heat of row or in the leading passage of heat, thus strengthen its heat-conducting effect.
It is expanded on further, the plastic cement of component B imparts the good processing forming of component A to meet the processing modes such as the injection of low cost, perfusion, improve the toughness after component A makes high heat conduction inorganic matter thermoplastification compositions, intensity to meet as the requirement of mechanical strength of LED thermal component, ability of being heated required when being simultaneously considered as LED thermal component materials'use and resin is carried out selection and the modification of correspondence.
Being expanded on further, inorganic matter and plastics can produce thermal oxide when heating hybrid process and destroy the characteristic of itself, and in component C, antioxidant adds producing thus keeping the characteristic of inorganic matter and plastics itself of suppression thermal oxide.
It is expanded on further, inorganic matter and plastics can produce the friction of fierceness when heating hybrid process, compositions thermal oxide aggravation and inorganic matter abrasion length to height ratio is caused to change, in component C, the addition of lubricant makes inorganic matter diminish with plastic friction, also functions to change the mobility of thermally conductive composition and meet its needs next operation thermoplastic molding simultaneously.
It is expanded on further, in component C, the addition of coupling compatibility agent improves the interface binding power of each composition in thermally conductive composition, inorganic matter can be made to have thermoplasticity processing characteristics so that a small amount of plastics add, thereby ensure that the high-termal conductivity of thermally conductive composition, in thermally conductive composition, the interface binding power of each composition is strengthened simultaneously, also improves the performance such as toughness and intensity of thermally conductive composition.
Further illustrate, in thermally conductive composition, plastic components has and itself has the plastics such as polyphenylene sulfide, polyphenylene oxide of anti-flammability, LCP(Liquid Crystal Polymer, polymeric liquid crystal copolymer) or high-temperature nylon, have and itself do not have the plastics such as polypropylene, polyethylene of anti-flammability, polystyrene, polyester, polyamide, Merlon, ABS(Acrylonitrile Butadiene
Styrene plastic, acrylonitrile-butadiene-styrene (ABS) plastics), need the fire retardant in addition component C to impart high heat conduction inorganic matter thermoplastification compositions for the latter and there is anti-flammability, thus meet the UL requirement that high heat conduction inorganic matter thermoplastification compositions uses on electronic apparatus.
Beneficial effects of the present invention is as follows:
1. by the high heat conduction inorganic matter thermoplastification compositions made by the present invention, there is superior heat conductivity, and there is the injection molding processability of low cost, mechanical strength is also improved to meet as LED heat radiation part material or the use requirement of other electric equipment products thermal component materials simultaneously, as: same LED heat radiation part is used traditional metal materials (such as: metallic aluminium, copper etc.) manufacture, production cost is at 15～20 yuan, if the high heat conduction inorganic matter thermoplastification compositions using the present invention manufactures this LED heat radiation part, production cost only need to be at 5～6 yuan, visible, use the high heat conduction inorganic matter thermoplastification compositions of the present invention, greatly reduce the production cost of product, overcoming tradition uses metal material as the high cost of heat sink material, processing difficulties, the problems such as bad mechanical strength；
2. metallic aluminium, copper are in the oxidation of the process of use so that the capacity of heat transmission declines, and high heat conduction inorganic matter thermoplastification compositions oxidability compares metallic aluminium, copper is eager to excel, even oxidation does not the most affect its capacity of heat transmission；
3. the heat conduction thing using different length to height ratio carries out compounding and that length to height ratio is big heat conduction thing ratio in the 30% leading passage of heat formed above, thus ensure that the leading passage of heat of high heat conduction inorganic matter thermoplastification compositions can efficiently conduct heat, and smaller two the heat conduction thing that grows tall fills out the various sizes of gap between the leading passage of heat of row or in the leading passage of heat, thus strengthen its heat-conducting effect；
4. after the thermal component that electronic apparatus uses the method for " first dries refine afterwards extrude die face again cut " to prepare, both ensure that normal service life and the service behaviour of the chip of electric equipment products, it is ensured that the quality of product, ensure again the lifting of the smooth and easy and yield produced.
Accompanying drawing explanation
Fig. 1 is the curve chart that temperature is affected by height heat conduction inorganic matter thermoplastification compositions plane thermal conductivity of the present invention.
Detailed description of the invention
Below in conjunction with each specific embodiment, the invention will be further described:
Specific embodiment 1:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 51wt%, the polyester polyphenylene sulfide (macromolecule resin-plastic cement) of 29wt% and the function additive of 20wt% are made, the graphite (length to height ratio is 7000～100000) that component A therein comprises 70wt%, the graphite (length to height ratio is 1000～7000) of 10wt% and the graphite (length to height ratio is 10～1000) of 20wt%, function additive component C therein comprises 15wt% maleic anhydride grafting PS(Polystyrene, polystyrene plastics), 4wt% phosphorus type flame retardant, the antioxidant 1010 of 0.5wt%, the irgasfos 168 of 0.5wt%.
Its processing technology is: the graphite in mentioned component is first put in air dry oven 125 DEG C and toasts 2 hours, polyphenylene sulfide is put in air dry oven 120 DEG C and toasts 2 hours, enter double screw extruder after then load weighted each raw material is put in banbury unlatching temperature banburying 5 minutes to carry out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing, thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 13W/m.k, and specific insulation is 1E4 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.6%, and bending strength is 50MPa, and bending modulus is 12Gpa, UL(Underwriter Laboratories
Inc., Underwriters Laboratories) vertical combustion flame retardant rating is V0.
Specific embodiment 2:
nullDisclosed one high heat conduction inorganic matter thermoplastification compositions，It is by component A of 51wt%，The polyester PET (macromolecule resin-plastic cement) of 29wt% and the function additive of 20wt% are made，The carborundum (length to height ratio is 7000～100000) that component A therein comprises 70wt%，The carborundum (length to height ratio is 1000～7000) of 10wt% and the carborundum (length to height ratio is 10～1000) of 20wt%，Function additive component C therein comprises the halogen TDE of 9wt%,The antimony oxide of 3wt%,The ethylene of the maleic anhydride grafting Poe(employing metallocene catalyst of 6wt% and octene realize the thermoplastic elastomer (TPE) of in-situ polymerization),The oleamide of 1wt%，The antioxidant 245 of 1wt%.
Its processing technology is: the carborundum in mentioned component is first put in air dry oven 125 DEG C and toasts 5 hours, simultaneously, polyester PET is put in air dry oven 120 DEG C toast 5 hours, enter double screw extruder after then load weighted each raw material is put in banbury unlatching temperature banburying 30 minutes to carry out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing, thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 9.5W/m.k, and specific insulation is 1E10 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.4%, and bending strength is 55MPa, bending modulus be 12GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 3:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 88wt%, the polyester (macromolecule resin-plastic cement) of 10wt% and function additive component C of 2wt% are made, the carbon fiber (length to height ratio is 7000～100000) that component A therein comprises 30wt%, the graphite (length to height ratio is 1000～7000) of 60wt% and the graphite (length to height ratio is 10～1000) of 10wt%, function additive component C therein comprises the antioxidant 1010 of 0.5wt%, the antioxidant 626 of 0.5wt%, the aluminate coupling agent of 1wt%.
Its processing technology is: first the graphite in mentioned component, carbon fiber is put in air dry oven 90 DEG C and is toasted 8 hours, simultaneously, polyester is put in air dry oven 105 DEG C toast 8 hours, then double screw extruder is entered after load weighted each raw material being put in banbury unlatching temperature banburying 18 minutes, carbon fiber adds at the side feeding of double screw extruder and carries out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing, thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 15W/m.k, and specific insulation is 1E3 Ohm*m, and notch impact strength is 2.5KJ/m2, elongation at break is 0.5%, and bending strength is 65MPa, bending modulus be 14Gpa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 4:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 59wt%, the polyamide (macromolecule resin-plastic cement) of 35wt% and the function additive of 6wt% are made, the carborundum (length to height ratio is 7000～100000) that component A therein comprises 50wt%, the graphite (length to height ratio is 1000～7000) of 35wt% and the graphite (length to height ratio is 10～1000) of 15wt%, function additive component C therein comprises the phosphorus type flame retardant of 4wt%, the stearate series lubricant agent of 1wt%, the antioxidant 1098 of 1wt%.
Its processing technology is: first the carborundum in mentioned component, graphite is put in air dry oven 125 DEG C and is toasted 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, enter double screw extruder after then load weighted each raw material is put in banbury unlatching temperature banburying 18 minutes to carry out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing and thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 10W/m.k, and specific insulation is 1E7 Ohm*m, and notch impact strength is 2.5KJ/m2, elongation at break is 0.6%, and bending strength is 60MPa, bending modulus be 12GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 5:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 88wt%, the polyester (macromolecule resin-plastic cement) of 10wt% and the function additive of 2wt% are made, the carbon fiber (length to height ratio is 7000～100000) that component A therein comprises 30wt%, the carborundum (length to height ratio is 1000～7000) of 60wt% and the carborundum (length to height ratio is 10～1000) of 10wt%, function additive component C therein comprises the polypropylene wax of 0.5wt%, the stearic amide of 0.5wt%, the titante coupling agent of 1wt%.
Its processing technology is: first the carborundum in mentioned component, carbon fiber is put in air dry oven 160 DEG C and is toasted 5 hours, simultaneously, polyester is put in air dry oven 90 DEG C toast 5 hours, then double screw extruder is entered after load weighted each raw material being put in banbury unlatching temperature banburying 18 minutes, carbon fiber adds at the side feeding of double screw extruder and carries out mixed and modified being extruded into bar by the porous dies of head, finally starts and earnestly carries out pelletizing and thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 13.5W/m.k, and specific insulation is 1E7 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.3%, and bending strength is 68MPa, bending modulus be 13.5GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 6:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 59wt%, the polyamide (macromolecule resin-plastic cement) of 38wt% and the function additive of 3wt% are made, the carbon fiber (length to height ratio is 7000～100000) that component A therein comprises 50wt%, the aluminium oxide (length to height ratio is 1000～7000) of 35wt% and the aluminium oxide (length to height ratio is 10～1000) of 15wt%, function additive component C therein comprises the antioxidant 1098 of 1wt%, the stearic amide of 1wt%, the silane coupling agent of 1wt%.
Its processing technology is: first the aluminium oxide in mentioned component, carbon fiber is put in air dry oven 160 DEG C and is toasted 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, then double screw extruder is entered after load weighted each raw material being put in banbury unlatching temperature banburying 18 minutes, carbon fiber adds at the side feeding of double screw extruder and carries out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing, thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 8.2W/m.k, and specific insulation is 1E8 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.4%, and bending strength is 60MPa, bending modulus be 12.5GPa, UL vertical combustion flame retardant rating be V2.
Specific embodiment 7:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 88wt%, the polyamide (macromolecule resin-plastic cement) of 10wt% and the function additive of 2wt% are made, the aluminium oxide (length to height ratio is 7000～100000) that component A therein comprises 70wt%, the graphite (length to height ratio is 1000～7000) of 10wt% and the graphite (length to height ratio is 10～1000) of 20wt%, function additive component C therein comprises the Tissuemat E of 1wt%, the stearic amide of 1wt%, the silane coupling agent of 1wt%.
Its processing technology is: first the graphite in mentioned component, aluminium oxide is put in air dry oven 125 DEG C and is toasted 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, enter double screw extruder after then load weighted each raw material is put in banbury unlatching temperature banburying 30 minutes to carry out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing, thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 8.5W/m.k, and specific insulation is 1E10 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.4%, and bending strength is 55MPa, bending modulus be 12GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 8:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 88wt%, the polyamide (macromolecule resin-plastic cement) of 10wt% and the function additive of 2wt% are made, the alumina fibre (length to height ratio is 7000～100000) that component A therein comprises 30wt%, the aluminium oxide (length to height ratio is 1000～7000) of 60wt% and the aluminium oxide (length to height ratio is 10～1000) of 10wt%, function additive component C therein comprises the stearate series lubricant agent of 1wt%, the antioxidant 1098 of 1wt%.
Its processing technology is: first the aluminium oxide in mentioned component, alumina fibre is put in air dry oven 160 DEG C and is toasted 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, then double screw extruder is entered after load weighted each raw material being put in banbury unlatching temperature banburying 18 minutes, alumina fibre adds at the side feeding of double screw extruder and carries out mixed and modified being extruded into bar by the porous dies of head, finally starts and earnestly carries out pelletizing and thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 6.8W/m.k, and specific insulation is 1E13 Ohm*m, and notch impact strength is 1.6KJ/m2, elongation at break is 0.3%, and bending strength is 50MPa, bending modulus be 12.5GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 9:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 88wt%, the high-temperature nylon (macromolecule resin-plastic cement) of 10wt% and the function additive of 2wt% are made, the zinc oxide fiber (length to height ratio is 7000～100000) that component A therein comprises 30wt%, the zinc oxide (length to height ratio is 1000～7000) of 60wt% and the zinc oxide (length to height ratio is 10～1000) of 10wt%, function additive component C therein comprises the antioxidant 1010 of 1wt%, the irgasfos 168 of 1wt%.
Its processing technology is: first the zinc oxide in mentioned component, zinc oxide fiber is put in air dry oven 160 DEG C and is toasted 8 hours, simultaneously, high-temperature nylon is put in air dry oven 120 DEG C toast 8 hours, then double screw extruder is entered after load weighted each raw material being put in banbury unlatching temperature banburying 18 minutes, alumina fibre adds at the side feeding of double screw extruder and carries out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing, thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 6W/m.k, and specific insulation is 1E13 Ohm*m, and notch impact strength is 1.6KJ/m2, elongation at break is 0.3%, and bending strength is 53MPa, bending modulus be 13.5GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 10:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 88wt%, the high-temperature nylon (macromolecule resin-plastic cement) of 10wt% and the function additive of 2wt% are made, the ceramics (length to height ratio is 7000～100000) that component A therein comprises 30wt%, the ceramics (length to height ratio is 1000～7000) of 60wt% and the ceramics (length to height ratio is 10～1000) of 10wt%, function additive component C therein comprises the antioxidant 1010 of 1wt%, the irgasfos 168 of 1wt%.
Its processing technology is: the ceramics in mentioned component is first put in air dry oven 160 DEG C and toasts 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, then double screw extruder is entered after load weighted each raw material being put in banbury unlatching temperature banburying 18 minutes, alumina fibre adds at the side feeding of double screw extruder and carries out mixed and modified being extruded into bar by the porous dies of head, finally start and earnestly carry out pelletizing, thus obtain granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 6.7W/m.k, and specific insulation is 1E13 Ohm*m, and notch impact strength is 1.6KJ/m2, elongation at break is 0.3%, and bending strength is 53MPa, bending modulus be 13.5GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 11:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 51wt%, the polyamide (macromolecule resin-plastic cement) of 29wt% and the function additive of 20wt% are made, the boron nitride (length to height ratio is 7000～100000) that component A therein comprises 70wt%, the boron nitride (length to height ratio is 1000～7000) of 10wt% and the boron nitride (length to height ratio is 10～1000) of 20wt%, function additive component C therein comprises the phosphorus type flame retardant of 15wt%, the nitrogen based flame retardant of 3wt%, the antioxidant 1010 of 1wt%, the irgasfos 168 of 1wt%.
Its processing technology is: the boron nitride fiber in mentioned component is first put in air dry oven 160 DEG C and toasts 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, entering double screw extruder after then load weighted each raw material is put in banbury unlatching temperature banburying 18 minutes to carry out mixed and modified being extruded into bar by the porous dies of head, last tie rod cooling and dicing thus obtains granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 8W/m.k, and specific insulation is 1E13 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.6%, and bending strength is 55MPa, bending modulus be 12.3GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 12:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 59wt%, the polyamide (macromolecule resin-plastic cement) of 35wt% and the function additive of 6wt% are made, the boron nitride (length to height ratio is 7000～100000) that component A therein comprises 30wt%, the aluminium oxide (length to height ratio is 1000～7000) of 60wt% and the aluminium oxide (length to height ratio is 10～1000) of 10wt%, function additive component C therein comprises the phosphorus type flame retardant of 4wt%, the stearate series lubricant agent of 1wt%, the antioxidant 1098 of 1wt%.
Its processing technology is: first the boron nitride in mentioned component, aluminium oxide is put in air dry oven 125 DEG C and is toasted 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, enter double screw extruder after then load weighted each raw material is put in banbury unlatching temperature banburying 30 minutes to carry out mixed and modified being extruded into bar by the porous dies of head, last tie rod cooling and dicing, thus obtains granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 7.2W/mk, and specific insulation is 1E13 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.4%, and bending strength is 50MPa, bending modulus be 12GPa, UL vertical combustion flame retardant rating be V0.
Specific embodiment 13:
Disclosed one high heat conduction inorganic matter thermoplastification compositions, it is by component A of 59wt%, the polyamide (macromolecule resin-plastic cement) of 35wt% and the function additive of 6wt% are made, the boron nitride (length to height ratio is 7000～100000) that component A therein comprises 30wt%, the zinc oxide (length to height ratio is 1000～7000) of 60wt% and the zinc oxide (length to height ratio is 10～1000) of 10wt%, function additive component C therein comprises the phosphorus type flame retardant of 4wt%, the stearate series lubricant agent of 1wt%, the antioxidant 1098 of 1wt%.
Its processing technology is: first the boron nitride in mentioned component, zinc oxide is put in air dry oven 125 DEG C and is toasted 5 hours, simultaneously, polyamide is put in air dry oven 90 DEG C toast 5 hours, entering double screw extruder after then load weighted each raw material is put in banbury unlatching temperature banburying 30 minutes to carry out mixed and modified being extruded into bar by the porous dies of head, last tie rod cooling and dicing thus obtains granular high heat conduction inorganic matter thermoplastification compositions.
This high heat conduction inorganic matter thermoplastification compositions is molded into test product, and the plane thermal conductivity of this test product is 7W/m.k, and specific insulation is 1E13 Ohm*m, and notch impact strength is 2KJ/m2, elongation at break is 0.4%, and bending strength is 50MPa, bending modulus be 12GPa, UL vertical combustion flame retardant rating be V0.
Below in conjunction with subordinate list 1 and accompanying drawing specific embodiment thermal diffusivity is further analyzed summary:
| Embodiment order | Heat conduction species | Plane thermal conductivity |
| 1 | Graphite | 16W/m.k |
| 2 | Carborundum | 9.5W/m.k |
| 3 | Carbon fiber, graphite | 15W/m.k |
| 4 | Carborundum, graphite | 10W/m.k |
| 5 | Carbon fiber, carborundum | 13.5W/m.k |
| 6 | Carbon fiber, aluminium oxide | 8.2W/m.k |
| 7 | Aluminium oxide, graphite | 8.5W/m.k |
| 8 | Aluminium oxide | 6.8W/m.k |
| 9 | Zinc oxide | 6W/m.k |
| 10 | Ceramics | 6.7W/m.k |
| 11 | Boron nitride | 8W/m.k |
| 12 | Boron nitride, aluminium oxide | 7.2W/m.k |
| 13 | Boron nitride, zinc oxide | 7W/m.k |
Table 1
As seen from Table 1:
Carbon and carbon compound or its fiber are the high heat conduction inorganic matter thermoplastification compositions of main body, and plane thermal conductivity is 9～16W/m.k；
Carbon and carbon compound or its fiber are main compositions with aluminum compound or its fiber composite, and plane thermal conductivity is 8～9W/m.k；
Aluminum compound or its fiber and zinc compound or the high heat conduction inorganic matter thermoplastification compositions that its fiber is main body, plane thermal conductivity is 6～7W/m.k；
Boron compound or its fiber are the high heat conduction inorganic matter thermoplastification compositions of main body, and plane thermal conductivity is at about 8W/m.k；
Boron and aluminum or the high heat conduction inorganic matter thermoplastification compositions that zinc compound is main body, plane thermal conductivity is 7～8W/m.k.
As shown in Figure 1, when heat conductivity is less than 5W/m.k, belong to the situation that conduction of heat is limited, in this case the change that heat conductivity is the least all can make the change that temperature difference is the biggest, when heat conductivity is more than 5W/m.k, belong to convection-limited situation, as seen from the figure when material thickness 5mm and following in the case of, heat conductivity is all to level off to 0 to the impact of temperature difference, so now heat conductivity is that the impact of junction temperature has been more or less the same by 5W/m.K or 200W/m.K, radiating effect depends primarily on flow area and convection intensity, so height heat conduction inorganic matter thermoplastification compositions plane thermal conductivity of the present invention can meet the requirement to radiating effect of the general high-power LED lamp 6～16W/m.k.
nullIn sum，By the high heat conduction inorganic matter thermoplastification compositions made by the present invention, there is superior heat conductivity，And there is the injection molding processability of low cost，Mechanical strength is also improved to meet the use requirement using requirement as LED heat radiation part material or other electric equipment products thermal component materials simultaneously，As: same LED heat radiation part is used traditional metal materials (such as: metallic aluminium、Copper etc.) manufacture，Production cost is at 15～20 yuan，If the high heat conduction inorganic matter thermoplastification compositions using the present invention manufactures this LED heat radiation part，Production cost only need to be at 5～6 yuan，Visible，Use the high heat conduction inorganic matter thermoplastification compositions of the present invention，Greatly reduce the production cost of product，Overcoming tradition uses metal material as the high cost of heat sink material，Processing difficulties，The problems such as bad mechanical strength，Avoid metal material and in use reduce the situation of heat conductivility because of oxidation；The heat conduction thing using different length to height ratio carries out compounding and that length to height ratio is big heat conduction thing ratio in the 30% leading passage of heat formed above, thus ensure that the leading passage of heat of high heat conduction inorganic matter thermoplastification compositions can efficiently conduct heat, and smaller two the heat conduction thing that grows tall fills out the various sizes of gap between the leading passage of heat of row or in the leading passage of heat, thus strengthen its heat-conducting effect；After the thermal component that electronic apparatus uses the method for " first dries refine afterwards extrude die face again cut " to prepare, both ensure that normal service life and the service behaviour of the chip of electric equipment products, it is ensured that the quality of product, ensure again the lifting of the smooth and easy and yield produced.
The above is only to presently preferred embodiments of the present invention; not the scope of the present invention is defined; therefore on the premise of designing spirit without departing from the present invention; the equivalence that feature of the present invention and principle are done by this area ordinary skill technical staff changes or modifies, and all should fall in the protection domain of the present patent application patent.
Claims (4)
- The preparation method of the highest heat conduction inorganic matter thermoplastification compositions, it is characterised in that: described high heat conduction inorganic matter thermoplastification compositions is made up of the component of following weight ratio:Component A, this component A is the inorganic matter of one or more tool high thermal conductivities of 51～88wt%；The inorganic matter of described tool high thermal conductivity is the inorganic matter of one or more tool high thermal conductivities of graphite, carbon dust, carborundum, aluminium powder, aluminium oxide, aluminium nitride, zinc oxide, ceramics or boron nitride；Component B, this component B is the plastics of one or more tool well processed characteristics of 10～38wt%；The plastics of described tool well processed characteristic are the plastics of one or more tool well processed characteristics of polypropylene, polyethylene, polystyrene, polyphenylene sulfide, polyphenylene oxide, ABS or high-temperature nylon；Component C, this component C is the function additive of 2～20wt%, includes antioxidant, lubricant, coupling compatibility agent and fire retardant in described component C；Described component A is made up of the inorganic matter of the tool high thermal conductivity that one or more length to height ratios are 10～1000 of the tool inorganic matter of high thermal conductivity, 10～the 40wt% that one or more length to height ratios are 1000～7000 of the tool inorganic matter of high thermal conductivity, 10～the 60wt% that one or more length to height ratios of 30～70wt% are 7000～100000；Its preparation method is as follows:1) component A configured is dried 2～8 hours with 90～160 DEG C in drying machine, component B configured is dried 2～8 hours with 90～120 DEG C in another drying machine simultaneously；2) carry out mixing or banburying by powder body in dried component A, B, C and granular substance, preprocessing 5～30 minutes, make initial material；3) the initial material feeding extruder will made, threadiness heat conduction inorganic matter is modified processing by the addition of side feeding, porous dies is extruded into bar；4) material being extruded into bar is carried out die face cutting or tie rod cooling and dicing, make high heat conduction inorganic matter thermoplastification compositions.
- 2. according to the preparation method described in claim 1, it is characterized in that: described antioxidant packages contains one or more compounds in Hinered phenols antioxidant or phosphite ester kind antioxidant, this Hinered phenols antioxidant is antioxidant 1010, antioxidant 1098 or antioxidant 245, and this phosphite ester kind antioxidant is irgasfos 168, antioxidant 626 or antioxidant P-EPQ.
- 3. according to the preparation method described in claim 1, it is characterised in that: described lubricant includes one or more compounds in stearic amide or stearate, Tissuemat E or polypropylene wax or its oxide, oleamide.
- Preparation method the most according to claim 1, it is characterized in that: described coupling compatibility agent includes one or more compounds in silanes, titanate ester or aluminate, maleic anhydride grafts, described fire retardant includes one or more compounds in Phosphorus, nitrogen class, halogen or antimonide.
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