CN102604219A - Preparation method of high-heat-conduction thermal-plasticizing inorganic substance composition and heat-dissipation part manufactured by method - Google Patents
Preparation method of high-heat-conduction thermal-plasticizing inorganic substance composition and heat-dissipation part manufactured by method Download PDFInfo
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- CN102604219A CN102604219A CN2012100628740A CN201210062874A CN102604219A CN 102604219 A CN102604219 A CN 102604219A CN 2012100628740 A CN2012100628740 A CN 2012100628740A CN 201210062874 A CN201210062874 A CN 201210062874A CN 102604219 A CN102604219 A CN 102604219A
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Abstract
The invention discloses a preparation method of a high-heat-conduction thermal-plasticizing inorganic substance composition and a heat-dissipation part manufactured by the method. The high-heat-conduction thermal-plasticizing inorganic substance composition is prepared by a component A, a component B and a component C, wherein the component A consists of 51wt%-88wt% of one or more inorganic substances with high heat conduction performance, the component B consists of 10wt% to 38wt% of one or more plastics with good processing properties, and the component C consists of 2wt% to 20wt% of a function additive. The preparation method comprises the following steps that: firstly, the configured component A and the configured component B are dried; secondly, the dried components A, B and C are mixed or internally mixed and then are preprocessed to manufacture raw materials; the manufactured raw materials are fed into an extruder, and fibrous heat-conduction inorganic substances are added from a side feeding part to perform modified processing and then are extruded into strips through a multiple-hole die; and fourthly, the materials extruded into strips are subjected to die-surface sized dicing or brace cooling sized dicing, thereby manufacturing the high-heat-conduction thermal-plasticizing inorganic substance composition. According to the invention, the normal service life and work performance of a chip of an electronic product are ensured, and the production cost is reduced.
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 powder and fiber thereof and be the main body with the tool high thermal conductivity; Composite thermoplastic plastic cement and functional agent make inorganics have thermoplasticity, thereby are configured to the making method of high heat conduction inorganics thermoplastification compsn and the thermal component of being made by this method.
Background technology
LED (Light Emitting Diode; Photodiode) related prods is regarded as one of following staple product of influence; Particularly the LED lamp lighting has major contribution in energy-conserving and environment-protective, but heat radiation is the restriction LED lamp lighting intensity and a principal element in life-span.The LED light fixture is higher by 80% than traditional incandescent light efficiency, but its assembly and drive circuit heat dissipation capacity are very big.If these heats do not have suitable emitting, the luminous and life-span of LED light fixture will sharply descend.
Existing traditional LED heat sink material is main with metallic aluminium, copper; These materials have high thermal conductivity, high mechanical strength; Can also process to satisfy the requirement of different shapes scatterer through modes such as plating, moulding or cuttings; But its processing difficulties costs an arm and a leg---need multiple different machine or expensive mould, rim charge that is produced simultaneously or finished product use the back to reclaim complex process even can't reclaim use.
Diamond is best heat sink material in the nature heat sink material system---1500W/m.k～2500W/m.k is that other materials is incomparable; But unique shortcoming is to cost an arm and a leg to popularize; Next is that graphite material can replace other heat sink materials in heat radiation system; It is only second to CVD (Chemical Vapor Deposition chemical gaseous phase deposition) diamond and reaches the thermal conductivity coefficient to 400W/m.k～1500W/m.k, has higher heat radiation advantage than metal objects such as gold and silver, copper.So similar these non-metallic material or metallic compound or its fiber thermal conductivity; Not only equal to traditional heat sink material metallic aluminium, copper etc.; And has traditional incomparable low price of heat sink material metallic aluminium, copper again; Be exactly processing difficulties, bad mechanical strength,, not only also possess superior thermal conductivity if repeatedly test these non-metallic material, metallic compound or its fiber through after making special hybrid process with small amount of polymer resin (plastic cement) through us; Thereby reach and can low-cost injection moulding process but also give its thermoplastification characteristic, physical strength also is improved to satisfy the request for utilization as LED heat radiation part material simultaneously.
So the present invention not only provides a kind of material of using as heat radiation part, also for respect to the high LED light fixture that can't large-scale promotion of traditional energy-conservation electricity, incandescent light a method that reduces production costs being provided because of single lamp price.
Summary of the invention
The objective of the invention is to overcome weak point of the prior art and a kind of high heat conduction inorganics thermoplastification compsn and manufacture craft thereof are provided; It breaks the thinking limitation that existing plastic cement adds conductive powder; The plastic cement of breaking through in the past adds the present situation of the thermal conductivity of conductive powder than metallic aluminium, copper difference; The heat that produces during various electric equipment productss work that this material can effectively be derived the LED class; Guarantee the normal work-ing life and the serviceability of chip of the various electric equipment productss of LED class, more reduced production cost.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
High heat conduction inorganics thermoplastification preparation of compositions method, said high heat conduction inorganics thermoplastification compsn is processed by following components in part by weight:
Component A, this component A are the inorganics of one or more tool high thermal conductivities of 51～88wt% (wight, wt is meant mass percent, refers to that promptly mass percent is 51～88%);
B component, this B component are the plastics of one or more tool well processed characteristics of 10～38wt%;
Component C, this component C is the functional agent of 2～20wt%, this functional agent is a high molecular polymer;
Its preparation method is following:
1) with the component A that configures in drying machine with 90～160 ℃ of dryings 2～8 hours, simultaneously with the B component that configures in another drying machine with 90～120 ℃ of dryings 2～8 hours;
2) powder and granular substance among dried component A, B, the C are mixed or banburying, initial material is processed in preprocessing 5～30 minutes;
3) with the initial material feeding forcing machine of processing, fibrous heat conduction inorganics is extruded slivering by adding the carrying out modification processing of side feeding place by porous dies;
4) material of extruding slivering is carried out die face cutting or tie rod cooling and dicing, process high heat conduction inorganics thermoplastification compsn.
Wherein, component A comprises the inorganics of one or more tool high thermal conductivities in carbon and carbon compound or its fiber, aluminium and aluminium compound or its fiber, zinc compound or its fiber, boron compound or its fiber.
Further, component A comprises the inorganics of one or more tool high thermal conductivities of graphite, carbon dust, silit, aluminium powder, aluminum oxide, aluminium nitride AlN, zinc oxide, ceramics powder, SP 1.
Further, component A is that one or more length to height ratios of inorganics, the 10～60wt% of 7000～100000 tool high thermal conductivity are that one or more length to height ratios of inorganics, the 10～40wt% of 1000～7000 tool high thermal conductivity are that the inorganics of 10～1000 tool high thermal conductivity is processed by one or more length to height ratios (length/height) of 30～70wt%.
Wherein, B component is the plastics of one or more tool well processed characteristics of Vestolen PP 7052, Vilaterm, PS, polyester, polymeric amide, polyphenylene sulfide, ppe, polycarbonate, ABS, LCP or high-temperature nylon.
Wherein, comprise among the component C oxidation inhibitor and the lubricant giving component A and B component and have processing forming, give component A and B component and have the coupling compatibility agent of tool high-performance and give component A and fire retardant that B component has flame retardant resistance.
Further; Antioxidant packages among the component C contains one or more compounds in Hinered phenols antioxidant or the phosphite ester kind antioxidant; This Hinered phenols antioxidant is four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester [antioxidant 1010], N, N '-hexamethyl two (3; 5-di-t-butyl-4-hydroxybenzene propionic acid amide [oxidation inhibitor 1098] or triglycol be two-3-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl) propenoate [oxidation inhibitor 245]; This phosphite ester kind antioxidant is two diphosphorous acid two (2, the 4-di-tert-butyl-phenyl) esters [oxidation inhibitor 626] or four (2 of tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) esters [oxidation inhibitor 168], tetramethylolmethane; 4-di-tert-butyl-phenyl-4,4 ' xenyl) biphosphonate [oxidation inhibitor P-EPQ].
Again further, the lubricant among the component C includes one or more compounds in stearic amide or stearate, polyethylene wax or Poly Propylene Wax or its oxide compound, the oleylamide.
Again further, the coupling compatibility agent among the component C includes one or more compounds in silicane, titanate ester or aluminium esters of gallic acid, the maleic anhydride grafts.
Further, the fire retardant among the component C includes one or more compounds in Phosphorus, nitrogen class, halogen or the antimonide.
Adopt the thermal component of above-mentioned preparing method's manufacturing, the said high heat conduction inorganics thermoplastification compsn that makes is become the thermal component of electric equipment products through mold injection molding.
The inorganics of the tool high thermal conductivity of component A as stated; Use the heat conduction thing of different length to height ratios to carry out heat conduction thing ratio composite and that length to height ratio is big and forming the leading passage of heat more than 30%; Thereby guarantee that the leading passage of heat of mixed material can efficiently conduct heat; And two less heat conduction things of length to height ratio are filled out between the leading passage of heat of row or the gap of the different size in the leading passage of heat, thereby strengthen its heat-conducting effect.
Further set forth; The plastic cement of B component has been given the good processing forming of component A to satisfy processing mode such as injection moulding, perfusion cheaply; Toughness after component A makes high heat conduction inorganics thermoplastification compsn, intensity have been improved to satisfy requirement of mechanical strength, the needed ability of being heated when being considered as LED thermal component material simultaneously and using and resin is carried out corresponding selection and modification processing as the LED thermal component.
Further set forth, inorganics and plastics can produce thermooxidizing and destroy itself characteristic when the heating hybrid process, thereby the adding of oxidation inhibitor suppresses the generation maintenance inorganics of thermooxidizing and the characteristic of plastics itself among the component C.
Further set forth; Inorganics and plastics can produce fierce friction when the heating hybrid process; Cause compsn thermooxidizing aggravation and inorganics wearing and tearing length to height ratio to change; The adding of lubricant diminishes inorganics and plastic friction among the component C, and the while also plays the flowability that changes thermally conductive composition and satisfies its needs next operation thermoplastic molding.
Further set forth; The adding of coupling compatibility agent has improved the interface binding power of each composition in the thermally conductive composition among the component C; Thereby a spot of plastics are added can make inorganics have the thermoplasticity processing characteristics; Guaranteed the high thermal conductivity of thermally conductive composition thus, simultaneously the interface binding power of each composition is strengthened in the thermally conductive composition, has also improved the performances such as toughness and intensity of thermally conductive composition.
Further set forth; Plastic components has plastics itself that have flame retardant resistance such as polyphenylene sulfide, ppe, LCP (Liquid Crystal Polymer in the thermally conductive composition; Polymeric liquid crystal copolymer) or high-temperature nylon; Plastics itself that do not have flame retardant resistance such as Vestolen PP 7052, Vilaterm, PS, polyester, polymeric amide, polycarbonate, ABS (Acrylonitrile Butadiene Styrene plastic are arranged; The acrylonitrile-butadiene-styrene (ABS) plastics); Need add fire retardant among the component C for the latter and give high heat conduction inorganics thermoplastification compsn and have flame retardant resistance, thereby satisfy the UL requirement that high heat conduction inorganics thermoplastification compsn uses on electronic apparatus.
Beneficial effect of the present invention is following:
1. have superior thermal conductivity through the made high heat conduction inorganics thermoplastification compsn of the present invention, and have injection moulding processibility cheaply, physical strength also is improved to satisfy the request for utilization as LED heat radiation part material or other electric equipment products thermal component materials simultaneously; As: same LED heat radiation part is adopted traditional metal materials (as: metallic aluminium, copper etc.) manufacturing; Production cost is at 15～20 yuan, if use high heat conduction inorganics thermoplastification compsn of the present invention to make this LED heat radiation part, production cost only needs at 5～6 yuan; It is thus clear that; Adopt high heat conduction inorganics thermoplastification compsn of the present invention, greatly reduce production cost of products, overcome traditional use metallic substance expensive as heat sink material; Processing difficulties, problems such as bad mechanical strength;
2. thereby metallic aluminium, copper descend the capacity of heat transmission in the use oxidation, and high heat conduction inorganics thermoplastification compsn oxidation capacity is compared metallic aluminium, copper is eager to excel, even oxidation does not influence its capacity of heat transmission yet;
3. use the heat conduction thing of different length to height ratios to carry out heat conduction thing ratio composite and that length to height ratio is big and forming the leading passage of heat more than 30%; Thereby the leading passage of heat that guarantees high heat conduction inorganics thermoplastification compsn can efficiently be conducted heat; And two less heat conduction things of length to height ratio are filled out between the leading passage of heat of row or the gap of the different size in the leading passage of heat, thereby strengthen its heat-conducting effect;
4. adopt the thermal component that the method for " dry by the fire earlier afterwards refine extrude die face again cut " makes at electronic apparatus after; The normal work-ing life and the serviceability of the chip of electric equipment products had both been guaranteed; Guarantee the quality of product, guaranteed the lifting of the smooth and easy and output of production again.
Description of drawings
Fig. 1 is the graphic representation of the high heat conduction inorganics of the present invention thermoplastification compsn plane thermal conductivity to temperature effect.
Embodiment
Below in conjunction with each specific embodiment the present invention is described further:
Specific embodiment 1:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 51wt%, and the polyester polyphenylene sulfide (macromolecule resin-plastic cement) of 29wt% and the functional agent of 20wt% are processed, and component A wherein comprises the graphite (length to height ratio is 7000～100000) of 70wt%; The graphite (length to height ratio is 10～1000) of the graphite of 10wt% (length to height ratio is 1000～7000) and 20wt%; Functional agent component C wherein comprises 15wt% maleic anhydride graft PS (Polystyrene, polystyrene plastics), 4wt% phosphorus type flame retardant; The antioxidant 1010 of 0.5wt%, the oxidation inhibitor 168 of 0.5wt%.
Its manufacture craft is: earlier the graphite in the mentioned component is put in 125 ℃ of bakings of air dry oven 2 hours; Polyphenylene sulfide is put in 120 ℃ of bakings of air dry oven 2 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into twin screw extruder after 5 minutes and carry out mixed and modified porous dies and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 13W/m.k, and volume specific resistance is 1E4 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.6%, and flexural strength is 50MPa, and modulus in flexure is 12Gpa, and UL (Underwriter Laboratories Inc., American insurance merchant laboratory) vertical combustion flame retardant rating is V0.
Specific embodiment 2:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 51wt%; The functional agent of the polyester PET of 29wt% (macromolecule resin-plastic cement) and 20wt% is processed; Component A wherein comprises the silit (length to height ratio is 7000～100000) of 70wt%, the silit (length to height ratio is 10～1000) of the silit of 10wt% (length to height ratio is 1000～7000) and 20wt%, and functional agent component C wherein comprises the halogen TDE of 9wt%; The Antimony Trioxide: 99.5Min of 3wt%; The maleic anhydride graft Poe of 6wt% (adopting the ethene of metallocene catalyst and the thermoplastic elastomer that octene is realized in-situ polymerization), the oleylamide of 1wt%, the oxidation inhibitor 245 of 1wt%.
Its manufacture craft is: earlier the silit in the mentioned component is put in 125 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polyester PET is put in 120 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and gets into twin screw extruder after 30 minutes and carry out mixed and modified porous dies by head and extrude slivering, pelletizing is earnestly carried out in startup at last, obtains granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 9.5W/m.k, and volume specific resistance is 1E10 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.4%, and flexural strength is 55MPa, and modulus in flexure is 12GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 3:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 88wt%; The functional agent component C of the polyester of 10wt% (macromolecule resin-plastic cement) and 2wt% processes; Component A wherein comprises the thomel (length to height ratio is 7000～100000) of 30wt%, the graphite (length to height ratio is 10～1000) of the graphite of 60wt% (length to height ratio is 1000～7000) and 10wt%, and functional agent component C wherein comprises the antioxidant 1010 of 0.5wt%; The oxidation inhibitor 626 of 0.5wt%, the aluminium esters of gallic acid coupling agent of 1wt%.
Its manufacture craft is: earlier the graphite in the mentioned component, thomel are put in 90 ℃ of bakings of air dry oven 8 hours; Simultaneously; Polyester is put in 105 ℃ of bakings of air dry oven 8 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into twin screw extruder after 18 minutes; Thomel carries out mixed and modified porous dies by head through the adding of the side feeding place of twin screw extruder and extrudes slivering, starts at last and earnestly carries out pelletizing, obtains granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 15W/m.k, and volume specific resistance is 1E3 Ohm*m, and notched Izod impact strength is 2.5KJ/m
2, elongation at break is 0.5%, and flexural strength is 65MPa, and modulus in flexure is 14Gpa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 4:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 59wt%; The functional agent of the polymeric amide of 35wt% (macromolecule resin-plastic cement) and 6wt% is processed; Component A wherein comprises the silit (length to height ratio is 7000～100000) of 50wt%, the graphite (length to height ratio is 10～1000) of the graphite of 35wt% (length to height ratio is 1000～7000) and 15wt%, and functional agent component C wherein comprises the phosphorus type flame retardant of 4wt%; The stearate series lubricant agent of 1wt%, the oxidation inhibitor 1098 of 1wt%.
Its manufacture craft is: earlier the silit in the mentioned component, graphite are put in 125 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and gets into twin screw extruder after 18 minutes and carry out mixed and modified porous dies by head and extrude slivering, pelletizing is earnestly carried out in startup at last---obtain granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 10W/m.k, and volume specific resistance is 1E7 Ohm*m, and notched Izod impact strength is 2.5KJ/m
2, elongation at break is 0.6%, and flexural strength is 60MPa, and modulus in flexure is 12GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 5:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 88wt%; The functional agent of the polyester of 10wt% (macromolecule resin-plastic cement) and 2wt% is processed; Component A wherein comprises the thomel (length to height ratio is 7000～100000) of 30wt%, the silit (length to height ratio is 10～1000) of the silit of 60wt% (length to height ratio is 1000～7000) and 10wt%, and functional agent component C wherein comprises the Poly Propylene Wax of 0.5wt%; The stearic amide of 0.5wt%, the titante coupling agent of 1wt%.
Its manufacture craft is: earlier the silit in the mentioned component, thomel are put in 160 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polyester is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into twin screw extruder after 18 minutes; Thomel carries out mixed and modified porous dies by head through the adding of the side feeding place of twin screw extruder and extrudes slivering, starts at last and earnestly carries out pelletizing---obtain granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 13.5W/m.k, and volume specific resistance is 1E7 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.3%, and flexural strength is 68MPa, and modulus in flexure is 13.5GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 6:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 59wt%; The functional agent of the polymeric amide of 38wt% (macromolecule resin-plastic cement) and 3wt% is processed; Component A wherein comprises the thomel (length to height ratio is 7000～100000) of 50wt%, the aluminum oxide (length to height ratio is 10～1000) of the aluminum oxide of 35wt% (length to height ratio is 1000～7000) and 15wt%, and functional agent component C wherein comprises the oxidation inhibitor 1098 of 1wt%; The stearic amide of 1wt%, the silane coupling agent of 1wt%.
Its manufacture craft is: earlier the aluminum oxide in the mentioned component, thomel are put in 160 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into twin screw extruder after 18 minutes; Thomel carries out mixed and modified porous dies by head through the adding of the side feeding place of twin screw extruder and extrudes slivering, starts at last and earnestly carries out pelletizing, obtains granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 8.2W/m.k, and volume specific resistance is 1E8 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.4%, and flexural strength is 60MPa, and modulus in flexure is 12.5GPa, and UL vertical combustion flame retardant rating is V2.
Specific embodiment 7:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 88wt%; The functional agent of the polymeric amide of 10wt% (macromolecule resin-plastic cement) and 2wt% is processed; Component A wherein comprises the aluminum oxide (length to height ratio is 7000～100000) of 70wt%, the graphite (length to height ratio is 10～1000) of the graphite of 10wt% (length to height ratio is 1000～7000) and 20wt%, and functional agent component C wherein comprises the polyethylene wax of 1wt%; The stearic amide of 1wt%, the silane coupling agent of 1wt%.
Its manufacture craft is: earlier the graphite in the mentioned component, aluminum oxide are put in 125 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and gets into twin screw extruder after 30 minutes and carry out mixed and modified porous dies by head and extrude slivering, pelletizing is earnestly carried out in startup at last, obtains granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 8.5W/m.k, and volume specific resistance is 1E10 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.4%, and flexural strength is 55MPa, and modulus in flexure is 12GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 8:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 88wt%; The functional agent of the polymeric amide of 10wt% (macromolecule resin-plastic cement) and 2wt% is processed; Component A wherein comprises the sapphire whisker (length to height ratio is 7000～100000) of 30wt%; The aluminum oxide (length to height ratio is 10～1000) of the aluminum oxide of 60wt% (length to height ratio is 1000～7000) and 10wt%, functional agent component C wherein comprises the stearate series lubricant agent of 1wt%, the oxidation inhibitor 1098 of 1wt%.
Its manufacture craft is: earlier the aluminum oxide in the mentioned component, sapphire whisker are put in 160 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into twin screw extruder after 18 minutes; Sapphire whisker carries out mixed and modified porous dies by head through the adding of the side feeding place of twin screw extruder and extrudes slivering, starts at last and earnestly carries out pelletizing---obtain granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 6.8W/m.k, and volume specific resistance is 1E13 Ohm*m, and notched Izod impact strength is 1.6KJ/m
2, elongation at break is 0.3%, and flexural strength is 50MPa, and modulus in flexure is 12.5GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 9:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 88wt%; The functional agent of the high-temperature nylon of 10wt% (macromolecule resin-plastic cement) and 2wt% is processed; Component A wherein comprises the zinc oxide fiber (length to height ratio is 7000～100000) of 30wt%; The zinc oxide (length to height ratio is 10～1000) of the zinc oxide of 60wt% (length to height ratio is 1000～7000) and 10wt%, functional agent component C wherein comprises the antioxidant 1010 of 1wt%, the oxidation inhibitor 168 of 1wt%.
Its manufacture craft is: earlier the zinc oxide in the mentioned component, zinc oxide fiber are put in 160 ℃ of bakings of air dry oven 8 hours; Simultaneously; High-temperature nylon is put in 120 ℃ of bakings of air dry oven 8 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into twin screw extruder after 18 minutes; Sapphire whisker carries out mixed and modified porous dies by head through the adding of the side feeding place of twin screw extruder and extrudes slivering, starts at last and earnestly carries out pelletizing, obtains granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 6W/m.k, and volume specific resistance is 1E13 Ohm*m, and notched Izod impact strength is 1.6KJ/m
2, elongation at break is 0.3%, and flexural strength is 53MPa, and modulus in flexure is 13.5GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 10:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 88wt%; The functional agent of the high-temperature nylon of 10wt% (macromolecule resin-plastic cement) and 2wt% is processed, and component A wherein comprises the ceramics powder (length to height ratio is 7000～100000) of 30wt%, the ceramics powder (length to height ratio is 10～1000) of the ceramics powder of 60wt% (length to height ratio is 1000～7000) and 10wt%; Functional agent component C wherein comprises the antioxidant 1010 of 1wt%, the oxidation inhibitor 168 of 1wt%.
Its manufacture craft is: earlier the ceramics powder in the mentioned component is put in 160 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into twin screw extruder after 18 minutes; Sapphire whisker carries out mixed and modified porous dies by head through the adding of the side feeding place of twin screw extruder and extrudes slivering, starts at last and earnestly carries out pelletizing, obtains granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 6.7W/m.k, and volume specific resistance is 1E13 Ohm*m, and notched Izod impact strength is 1.6KJ/m
2, elongation at break is 0.3%, and flexural strength is 53MPa, and modulus in flexure is 13.5GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 11:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 51wt%; The functional agent of the polymeric amide of 29wt% (macromolecule resin-plastic cement) and 20wt% is processed, and component A wherein comprises the SP 1 (length to height ratio is 7000～100000) of 70wt%, the SP 1 (length to height ratio is 10～1000) of the SP 1 of 10wt% (length to height ratio is 1000～7000) and 20wt%; Functional agent component C wherein comprises the phosphorus type flame retardant of 15wt%; The nitrogen based flame retardant of 3wt%, the antioxidant 1010 of 1wt%, the oxidation inhibitor 168 of 1wt%.
Its manufacture craft is: earlier the boron nitride fibre in the mentioned component is put in 160 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and gets into twin screw extruder after 18 minutes and carry out mixed and modified porous dies and extrude slivering, at last the tie rod cooling and dicing by head---obtain granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 8W/m.k, and volume specific resistance is 1E13 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.6%, and flexural strength is 55MPa, and modulus in flexure is 12.3GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 12:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 59wt%; The functional agent of the polymeric amide of 35wt% (macromolecule resin-plastic cement) and 6wt% is processed; Component A wherein comprises the SP 1 (length to height ratio is 7000～100000) of 30wt%, the aluminum oxide (length to height ratio is 10～1000) of the aluminum oxide of 60wt% (length to height ratio is 1000～7000) and 10wt%, and functional agent component C wherein comprises the phosphorus type flame retardant of 4wt%; The stearate series lubricant agent of 1wt%, the oxidation inhibitor 1098 of 1wt%.
Its manufacture craft is: earlier the SP 1 in the mentioned component, aluminum oxide are put in 125 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and gets into twin screw extruder after 30 minutes and carry out mixed and modified porous dies by head and extrude slivering, the tie rod cooling and dicing obtains granular high heat conduction inorganics thermoplastification compsn thus at last.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 7.2W/mk, and volume specific resistance is 1E13 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.4%, and flexural strength is 50MPa, and modulus in flexure is 12GPa, and UL vertical combustion flame retardant rating is V0.
Specific embodiment 13:
Disclosed a kind of high heat conduction inorganics thermoplastification compsn; It is by the component A of 59wt%; The functional agent of the polymeric amide of 35wt% (macromolecule resin-plastic cement) and 6wt% is processed; Component A wherein comprises the SP 1 (length to height ratio is 7000～100000) of 30wt%, the zinc oxide (length to height ratio is 10～1000) of the zinc oxide of 60wt% (length to height ratio is 1000～7000) and 10wt%, and functional agent component C wherein comprises the phosphorus type flame retardant of 4wt%; The stearate series lubricant agent of 1wt%, the oxidation inhibitor 1098 of 1wt%.
Its manufacture craft is: earlier the SP 1 in the mentioned component, zinc oxide are put in 125 ℃ of bakings of air dry oven 5 hours; Simultaneously; Polymeric amide is put in 90 ℃ of bakings of air dry oven 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and gets into twin screw extruder after 30 minutes and carry out mixed and modified porous dies and extrude slivering, at last the tie rod cooling and dicing by head---obtain granular high heat conduction inorganics thermoplastification compsn thus.
Should be injection molded into the test product by high heat conduction inorganics thermoplastification compsn, the plane thermal conductivity of this test product is 7W/m.k, and volume specific resistance is 1E13 Ohm*m, and notched Izod impact strength is 2KJ/m
2, elongation at break is 0.4%, and flexural strength is 50MPa, and modulus in flexure is 12GPa, and UL vertical combustion flame retardant rating is V0.
Below in conjunction with subordinate list 1 and accompanying drawing to the summary that does further analysis of specific embodiment thermal diffusivity:
| The embodiment order | The heat conduction species | Plane |
| 1 | Graphite | 16W/m.k |
| 2 | Silit | 9.5W/m.k |
| 3 | Thomel, graphite | 15W/m.k |
| 4 | Silit, graphite | 10W/m.k |
| 5 | Thomel, silit | 13.5W/m.k |
| 6 | Thomel, aluminum oxide | 8.2W/m.k |
| 7 | Aluminum oxide, graphite | 8.5W/m.k |
| 8 | Aluminum oxide | 6.8W/m.k |
| 9 | Zinc oxide | 6W/m.k |
| 10 | Ceramics powder | 6.7W/m.k |
| 11 | |
8W/m.k |
| 12 | |
7.2W/m.k |
| 13 | |
7W/m.k |
Table 1
Visible from table 1:
Carbon and carbon compound or its fiber are the high heat conduction inorganics thermoplastification compsn of main body, and plane thermal conductivity is at 9～16W/m.k;
Carbon and carbon compound or its fiber and aluminium compound or its fiber composite are main compsn, and plane thermal conductivity is at 8～9W/m.k;
Aluminium compound or its fiber and zinc compound or its fiber are the high heat conduction inorganics thermoplastification compsn of main body, and plane thermal conductivity is at 6～7W/m.k;
Boron compound or its fiber are the high heat conduction inorganics thermoplastification compsn of main body, and plane thermal conductivity is about 8W/m.k;
Boron and aluminium or zinc compound are the high heat conduction inorganics thermoplastification compsn of main body, and plane thermal conductivity is at 7～8W/m.k.
Shown in accompanying drawing 1; At thermal conductivity during less than 5W/m.k; Belong to the limited situation of thermal conduction, the variation that thermal conductivity is very little in this case all can be made the very big variation of temperature head, at thermal conductivity during greater than 5W/m.k; Belong to the convection-limited situation; By figure visible when material thickness under 5mm and following situation, thermal conductivity all is to level off to 0 to the influence of temperature head, thus this moment thermal conductivity to be 5W/m.K or 200W/m.K be more or less the same to the influence of junction temperature; Radiating effect depends primarily on flow area and convection intensity, so the high heat conduction inorganics of the present invention thermoplastification compsn plane thermal conductivity can satisfy the requirement of general high-power LED lamp to radiating effect at 6～16W/m.k.
In sum, the high heat conduction inorganics thermoplastification compsn made through the present invention has superior thermal conductivity, and has injection moulding processibility cheaply; Physical strength also is improved to satisfy the request for utilization as the request for utilization of LED heat radiation part material or other electric equipment products thermal component materials simultaneously; As: same LED heat radiation part is adopted traditional metal materials (as: metallic aluminium, copper etc.) manufacturing, and production cost is at 15～20 yuan, if use high heat conduction inorganics thermoplastification compsn of the present invention to make this LED heat radiation part; Production cost only needs at 5～6 yuan; It is thus clear that, adopt high heat conduction inorganics thermoplastification compsn of the present invention, greatly reduce production cost of products; Overcome traditional use metallic substance expensive as heat sink material; Processing difficulties, problems such as bad mechanical strength have avoided metallic substance in use to reduce the situation of heat conductivility because of oxidation; Use the heat conduction thing of different length to height ratios to carry out heat conduction thing ratio composite and that length to height ratio is big and forming the leading passage of heat more than 30%; Thereby the leading passage of heat that guarantees high heat conduction inorganics thermoplastification compsn can efficiently be conducted heat; And two less heat conduction things of length to height ratio are filled out between the leading passage of heat of row or the gap of the different size in the leading passage of heat, thereby strengthen its heat-conducting effect; Adopt the thermal component that the method for " dry by the fire earlier afterwards refine extrude die face again cut " makes at electronic apparatus after, both guarantee the normal work-ing life and the serviceability of the chip of electric equipment products, guaranteed the quality of product, the lifting of the smooth and easy and output of assurance production again.
The above only is to preferred embodiment of the present invention; Be not that scope of the present invention is limited; So design under the prerequisite of spirit not breaking away from the present invention; The equivalence that the common engineering technical personnel in this area do characteristic according to the invention and principle changes or modifies, and all should fall in the protection domain that the present invention applies for a patent.
Claims (10)
1. high heat conduction inorganics thermoplastification preparation of compositions method is characterized in that: said high heat conduction inorganics thermoplastification compsn is processed by following components in part by weight:
Component A, this component A are the inorganics of one or more tool high thermal conductivities of 51～88wt%;
B component, this B component are the plastics of one or more tool well processed characteristics of 10～38wt%;
Component C, this component C is the functional agent of 2～20wt%, this functional agent is a high molecular polymer;
Its preparation method is following:
1) with the component A that configures in drying machine with 90～160 ℃ of dryings 2～8 hours, simultaneously with the B component that configures in another drying machine with 90～120 ℃ of dryings 2～8 hours;
2) powder and granular substance among dried component A, B, the C are mixed or banburying, initial material is processed in preprocessing 5～30 minutes;
3) with the initial material feeding forcing machine of processing, fibrous heat conduction inorganics is extruded slivering by adding the carrying out modification processing of side feeding place by porous dies;
4) material of extruding slivering is carried out die face cutting or tie rod cooling and dicing, process high heat conduction inorganics thermoplastification compsn.
2. preparation method according to claim 1 is characterized in that: said component A comprises the inorganics of one or more tool high thermal conductivities in carbon and carbon compound or its fiber, aluminium and aluminium compound or its fiber, zinc compound or its fiber, boron compound or its fiber.
3. preparation method according to claim 2 is characterized in that: said component A comprises the inorganics of one or more tool high thermal conductivities of graphite, carbon dust, silit, aluminium powder, aluminum oxide, aluminium nitride AlN, zinc oxide, ceramics powder or SP 1.
4. preparation method according to claim 1 is characterized in that: said component A is that one or more length to height ratios of inorganics, the 10～60wt% of 7000～100000 tool high thermal conductivity are that one or more length to height ratios of inorganics, the 10～40wt% of 1000～7000 tool high thermal conductivity are that the inorganics of 10～1000 tool high thermal conductivity is processed by one or more length to height ratios of 30～70wt%.
5. preparation method according to claim 1 is characterized in that: said B component is the plastics of one or more tool well processed characteristics of Vestolen PP 7052, Vilaterm, PS, polyester, polymeric amide, polyphenylene sulfide, ppe, polycarbonate, ABS, LCP or high-temperature nylon.
6. preparation method according to claim 1 is characterized in that: include oxidation inhibitor, lubricant, coupling compatibility agent and fire retardant among the said component C.
7. preparation method according to claim 6; It is characterized in that: said antioxidant packages contains one or more compounds in Hinered phenols antioxidant or the phosphite ester kind antioxidant; This Hinered phenols antioxidant is four [methyl-β-(3, the 5-di-tert-butyl-hydroxy phenyl) propionic ester] pentaerythritol ester [antioxidant 1010], N, N '-hexamethyl two (3; 5-di-t-butyl-4-hydroxybenzene propionic acid amide [oxidation inhibitor 1098] or triglycol be two-3-(3-tertiary butyl-4-hydroxy-5-aminomethyl phenyl) propenoate [oxidation inhibitor 245]; This phosphite ester kind antioxidant is two diphosphorous acid two (2, the 4-di-tert-butyl-phenyl) esters [oxidation inhibitor 626] or four (2 of tricresyl phosphite (2, the 4-di-tert-butyl-phenyl) esters [oxidation inhibitor 168], tetramethylolmethane; 4-di-tert-butyl-phenyl-4,4 ' xenyl) biphosphonate [oxidation inhibitor P-EPQ].
8. preparation method according to claim 6 is characterized in that: said lubricant includes one or more compounds in stearic amide or stearate, polyethylene wax or Poly Propylene Wax or its oxide compound, the oleylamide.
9. preparation method according to claim 6; It is characterized in that: said coupling compatibility agent includes one or more compounds in silicane, titanate ester or aluminium esters of gallic acid, the maleic anhydride grafts, and that said fire retardant includes is Phosphorus, one or more compounds in nitrogen class, halogen or the antimonide.
10. the thermal component that adopts each described preparation method of claim 1-9 to make is characterized in that: the thermal component that the said high heat conduction inorganics thermoplastification compsn that makes is become electric equipment products through mold injection molding.
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