CN102617927A - New material for reducing LED junction temperature and preparation method thereof - Google Patents
New material for reducing LED junction temperature and preparation method thereof Download PDFInfo
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Abstract
The invention relates to an inorganic material with high heat transfer and radiation characteristics in the technical field of LED (light-emitting diode) heat radiation. The technical scheme is as follows: a new material for reducing LED junction temperature comprises the following components in percent by weight: 50-90% of one or more inorganic material components A with high heat transfer and radiation characteristics, 5-48% of one or more plastic components B, and 2-20% of functional auxiliary agent component C. The preparing process of the new material for reducing the LED junction temperature comprises the following working steps: (1) heating and drying main materials; (2) respectively mixing organic materials and inorganic materials, and then metering and adding according to a proportion in sequence or adding after full mixing, banbury compounding, plastication and adhesion; (3) uniformly plasticizing and dispersing by a screw extruder; (4) extruding by a porous mold head to obtain strips; (5) carrying out mold head hot pelleting or strip cold pelleting; and (6) carrying out injection molding.
Description
Technical field
The inorganics that the present invention relates to high pass and the high thermal properties of loosing is used for the technical field that LED dispels the heat; It is based on serving as the main organic polymer material of introducing with the inorganics with high pass and the high thermal properties of loosing, and is prepared from through special process to have high pass and high loose thermal properties and matrix material or part with low cost.
Background technology
The shock resistance of plastics tool, anti-aging, Ginkgo Biloba Leaf Extract, weather-proof, machine-shaping make things convenient for characteristics such as cheapness to be widely used in shell, the Lamp cup material of electronic apparatuss such as electricity-saving lamp, low power LED lamp; But when being used for shell, the Lamp cup of high-powered LED lamp, hanging down because of its thermal conductivity and under the condition of natural heat dissipation, can't satisfy high-power LED lamp heat radiation requirement.
Graphene (Graphene) is a kind ofly to form the flat film that hexangle type is the honeycomb lattice by carbon atom with the sp2 hybridized orbital, has only the two-dimensional material of a carbon atom thickness, be the thinnest in the world be the hardest how rice material also; It almost is fully transparent; Only absorb 2.3% light, thermal conductivity is higher than diamond up to more than the 3000W/mK; Electronic mobility surpasses 15000cm2/Vs under the normal temperature, again than carbon nanotube or silicon wafer height.
Graphite material; Have that heat conduction is strong concurrently, rapid heat dissipation and the low advantage of cost; The thermal conductivity coefficient of its 400W/m.k～1500w/m.k is only second to best diamond---1500W/m.k～2500w/m.k in nature heat sink material system, have higher transmission and the heat advantage of loosing than metal objects such as gold and silver, copper, aluminium.
So these inorganic powder or its fiber---carbon class such as graphite, Graphene, carbon nanotube more than similar; Carbon compound such as silit; Burning or nitride-based like aluminum oxide, ceramics powder, zinc oxide, SP 1, aluminium nitride AlN; Metal-powder class such as silver powder, copper powder, aluminium powder or the like have the ability that solves the existing heat dissipation problem of LED environmental protection lighting, and most characteristics with low price, low density, high pass and the high thermal properties of loosing; But its processed complex, bad mechanical strength limit its use as the high-powered LED lamp sheating material.
The argumentation of comprehensive above-mentioned two sections " plastics " and " inorganic powder or its fiber "; Two kinds of materials compound; Not only possesses superior thermal conductivity; But also give its injection moulding processibility low-cost and flexible design, physical strength also is improved to satisfy the request for utilization as LED lamp housing material simultaneously.
The present invention has carried out useful improvement in order to overcome above-mentioned defective.
Summary of the invention
The present invention distinguishes and existingly on the basis of macromolecule resin, adds conductive powder; Thereby improve the limitation of thermal conductivity; Its purpose is to be the basis with inorganic powder or its fiber of high pass and the high thermal properties of loosing; Adding macromolecule resin and functional agent process special preparation technology thereof obtain to equal to the type material of metallic aluminium, copper, and a kind of type material that is used to reduce the LED junction temperature is provided.
To achieve these goals; Technical scheme of the present invention is: a kind of type material that is used to reduce the LED junction temperature is characterized in that it comprises following components in part by weight: 50%～90% a kind of or compound two or more inorganics component A with high pass and the high thermal properties of loosing; 5%～48% a kind of or compound two or more plastic fraction B; 2%～20% functional agent component C.
A kind of preparation technology who is used to reduce the type material of LED junction temperature is characterized in that it comprises following algorithm::
(1) main material heat drying;
(2) organic with after inorganics mixes respectively in proportion the branch succession be metered into or mix internal mixing and plasticizing bonding back entirely and add;
(3) the screw extrusion press plasticizing is uniformly dispersed;
(4) porous dies is extruded slivering;
(5) die head hot cut pellet or tie rod cooling and dicing;
(6) injection moulding.
Beneficial effect of the present invention:
1; The inorganic powder of high pass and the high thermal properties of loosing or its fiber are the basis; Add macromolecule resin and functional agent thereof and obtain the heat conduction type material of alternative metals aluminium, copper through special preparation technology, provide a kind of can alternative metals aluminium, copper is used for the technical scheme of LED heat radiation;
2; The inorganics (except that Graphene, carbon nanotube) of high pass and the high thermal properties of loosing by different meshes carry out composite; The ratio that particularly the order number is big is in the leading passage of heat of conduct more than 40%; What other order numbers were less or littler adds the gap of filling up the leading passage of heat in saturated ratio, forms the successional heat conduction pipeline of big area, improves greatly and transmits and the height heat ability of loosing;
3, carbon class, carbon compound or metal-powder class type material compsn can obtain high pass and height loose thermal properties and high conductivity; MOX and nitride-based type material compsn can obtain high pass and height loose thermal properties and high voltage electric insulation characterisitic; Carbon class type material compsn adds MOX or nitride-based, can obtain the electrical insulation characteristics of high pass and high loose thermal properties and low pressure; Carbon compound type material compsn adds MOX and nitride, can obtain high pass and height loose thermal properties and high voltage electric insulation characterisitic, for the various practical applications of LED provide multiple suitable selection scheme;
4; The science of coupling agent or compatilizer is used; Not only improving the transmission and the heat inorganics that looses links with the compatible of plastics; Not only improve the physical strength and the processibility of " type material ", thereby and make the high pass and the additional proportion of the high heat inorganics that looses accomplish that maximization improves " type material " and transmits and the heat ability of loosing;
5, the application of fire retardant makes part itself not possess " type material " of flame retardant resistance, obtains flame retardant resistance to satisfy the electric related request of UL;
6, adopt the method for " dry by the fire earlier afterwards refine or measure the segmentation adding, extrude fervent, moulding Lamp cup at last again ", the raising of the smooth and easy and output that has not only guaranteed the quality of product but also guaranteed to produce;
7, " type material " made Lamp cup and had low weight, low cost, meets environmental friendly regenerated utilization, design production flexibly.
Embodiment
Formula technique scheme of the present invention:
A kind of type material that is used to reduce the LED junction temperature is characterized in that it comprises following components in part by weight: 50%～90% a kind of or compound two or more inorganics component A with high pass and the high thermal properties of loosing; 5%～48% a kind of or compound two or more plastic fraction B; 2%～20% functional agent component C.
Say that further said component A comprises the carbon class, carbon compound, burning or nitride-based, one or more compsns of the powder of metal-powder class or fiber.
Further say; Said carbon class is graphite, Graphene, carbon nanotube; Said carbon compound is a silit, said burning or nitride-based be aluminum oxide, ceramics powder, zinc oxide, SP 1, aluminium nitride AlN, said metal-powder class such as silver powder, copper powder, aluminium powder.
Say that further said component A also comprises following components in part by weight:
40%～60% a kind of or compound two or more order number is 50～300 the inorganics with high pass and the high thermal properties of loosing;
10%～50% a kind of or compound two or more order number is 300～1250 the inorganics with high pass and the high thermal properties of loosing;
10%～30% a kind of or compound two or more be 1250 inorganics more than or equal to the order number with high pass and the high thermal properties of loosing.
Say that further said B component comprises Vestolen PP 7052, polyester, polymeric amide, polyphenylene sulfide, ppe, heat-resistant polyamide, LCP.
Say that further said component C comprises coupling agent or compatilizer, fire retardant, stablizer, lubricant.
Say that further said coupling agent or compatilizer comprise in silicane, titanate ester, aluminium esters of gallic acid, low sticking cyclic polyester resin CBT class, maleic anhydride grafts, the GMA glycidyl ether grafts a kind of or compound two or more;
Said fire retardant comprises bromide fire retardant, antimony is a kind of or compound two or more in synergistic flame retardant, phosphorus flame retardant, the nitrogen flame retardant;
Said stablizer comprises among antioxygen 1010, antioxygen 168, antioxygen H161, the antioxygen SEED a kind of or compound two or more; Said lubricant comprises in wax class, the stearate class a kind of or compound two or more;
Said carbon class of one embodiment of the present invention such as graphite, Graphene, carbon nanotube, thomel; Particularly graphite and carbon fiber content are 50% to 80%; Not only obtain high heat-conductivity conducting property and low-expansion coefficient but also glowing filament fire burning index (GWFI) and obviously promote, help the improvement and the lifting of mechanical property;
Said carbon compound of one embodiment of the present invention such as silit and metal-powder class such as silver powder, copper powder, aluminium powder., content not only obtains higher heat conduction and low-expansion coefficient but also possesses certain low voltage insulativity more than 50wt%, helps its use on most LED;
The said MOX of one embodiment of the present invention or nitride-based like aluminum oxide, ceramics powder, zinc oxide, SP 1, aluminium nitride AlN; Content is at 50wt% to 90wt%; Not only obtain high-conductivity and low-expansion coefficient but also have high-insulativity; Can make light color even raw white on the color simultaneously, help it to use more neatly at LED;
The present invention also discovers in addition: add MOX or nitride-based based on carbon class type material compsn, both total contents can guarantee that at 60wt% to 80wt% high pass obtains the electrical insulation characteristics of low pressure when loosing thermal properties property with height; Add MOX or nitride-based based on carbon compound type material compsn; Both total contents can guarantee that higher transfer obtains the electrical insulating property (specifically seeing " embodiment " case) of higher pressure when loosing thermal properties property with height more than 75wt%;
The inorganics that implementation process of the present invention (except that Graphene, carbon nanotube) has a big characteristics high pass and a high heat that looses by different meshes carry out composite; The leading passage of heat of the ratio that particularly the order number is big conduct more than 40wt%; Other less or littler inorganicss add the gap of filling up the leading passage of heat in saturated ratio; Thereby form the pipeline of the successional transmission of big area and the heat that looses, maximization improves transmits and the heat ability of loosing, and is embodied as:
Further, component A) by a kind of or compound two or more order number of 40wt%～60wt% be a kind of or compound two or more order number of 50～300 inorganics, 10wt%～50wt% with high pass and the high thermal properties of loosing be 300～1250 inorganics and 10wt%～30wt% with high pass and the high thermal properties of loosing a kind of or compound two or more be that 1250 the inorganics with high pass and the high thermal properties of loosing is processed more than or equal to the order number.
Further; B component) is the plastics composition of 5wt%～48wt%; Plastics comprise Vestolen PP 7052, polyester, polymeric amide, polyphenylene sulfide, ppe, high-temperature nylon, LCP; Its effect bonding passes inorganics, obtains good machine-shaping characteristic with satisfied processing mode such as injection moulding, perfusion cheaply, and improves toughness, intensity to satisfy the physical strength as the LED parts;
Further; 1.5%～15% coupling agent or the compatilizer that comprise total mass; Its role is to improve inorganics links with the compatible of plastics; Not only improve the physical strength and the processibility of " type material "; And make the high pass and the additional proportion of the high heat inorganics that looses accomplish that thereby maximization improves " type material " and transmits and the heat ability of loosing, be characterized as in silicane, titanate ester, aluminium esters of gallic acid, low sticking cyclic polyester resin CBT class, maleic anhydride grafts, GMA glycidyl ether grafts or the like a kind of or compound two or more;
Further, do not comprise or comprise fire retardant according to " type material " fire-retardant situation itself, as comprise it is characterized by bromide fire retardant, antimony is a kind of or compound two or more in synergistic flame retardant, phosphorus flame retardant, the nitrogen flame retardant etc.;
Further, do not comprise or comprise auxiliary agent that plays stable or lubrication or the like according to inorganics and processing of plastic characteristic in " type material ".
Manufacture craft technical scheme of the present invention is:
A kind of preparation technology who is used to reduce the type material of LED junction temperature is characterized in that it comprises following algorithm:: (1) main material heat drying; (2) organic with after inorganics mixes respectively in proportion the branch succession be metered into or mix internal mixing and plasticizing bonding back entirely and add; (3) the screw extrusion press plasticizing is uniformly dispersed; (4) porous dies is extruded slivering; (5) die head hot cut pellet or tie rod cooling and dicing; (6) injection moulding.
1, component A is spent dry 2～8 hours at drying machine 90～160, B component is spent dry 2～8 hours at drying machine 90～120---guarantee that material moisture is dried reduction and added the hydrolysis in man-hour and degradation;
The material that 2, will prepare by the formula technique scheme of the invention described above carry out preprocessing 5～30 minutes such as banburying so that preliminary bonding back get into screw extrusion press further plasticizing be uniformly dispersed, or component A, B component C mix respectively the back earlier by B component C measure in proportion get into after the screw extrusion press plasticizing again with component A measure in proportion get into screw extrusion press further plasticizing be uniformly dispersed;
The cause of above step: the present invention is main with high pass and height loose thermal properties inorganic powder or fiber; Do not plastify the bonding screw extrusion press that just is mixed into; Can cause the component layering can't homodisperse; Can cause the transmission that surface hardness is high, frictional coefficient is big and the heat inorganics that looses to give birth to the mill plastics; The former heat dissipation pipeline skewness can't form the successional heat conduction pipeline of saturated big area, thereby the degraded of latter's macromolecule resin causes mixing the type material performance decrease, thus transmit and the heat inorganics that looses ground, arranged disorderly and unsystematic formation not the good leading passage of heat influence its thermal conductivity;
3, process " type material " and extrude slivering, carry out the fervent or tie rod cooling and dicing of die head by porous dies;
The cause of above step: the present invention with transmit and the heat inorganics that looses as main body, can descend with the viscosity of increase the mixings type material of its ratio and can't accomplish the tie rod cooling, thereby adopt the lifting of the smooth and easy and output that earnestly guarantees to produce during pelletizing;
4, " type material " carried out the injection moulding pre-treatment after, injection moulding close requirement Lamp cup or the test product.
Below be 21 embodiments of the present invention
Embodiment one
Earlier graphite in the above-mentioned prescription was put in air dry oven 125 degree roasting 2 hours; Polyphenylene sulfide was put in air dry oven 120 degree roasting 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 " type material ".
Embodiment two
Earlier graphite, carbon nanotube in the above-mentioned prescription were put in air dry oven 125 degree roasting 2 hours; Polyphenylene sulfide was put in air dry oven 120 degree roasting 2 hours; Graphite is with carbon nanotube, polyphenylene sulfide and after functional agent mixes respectively then; Earlier measure in proportion to get into after the screw extrusion press plasticizing again graphite and carbon nanotube mixture measured in proportion and get into further plasticizing of screw extrusion press and be uniformly dispersed by polyphenylene sulfide and functional agent mixture; Porous dies by head is extruded slivering, starts at last and earnestly carries out pelletizing, obtains granular " type material ".
Embodiment three
Earlier graphite, thomel in the above-mentioned prescription were put in air dry oven 90 degree roasting 8 hours; Polymeric amide was put in air dry oven 105 degree roasting 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 " type material ".
Embodiment four
Earlier graphite, Graphene in the above-mentioned prescription were put in air dry oven 125 degree roasting 2 hours; Polyphenylene sulfide was put in air dry oven 120 degree roasting 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 18 minutes and carry out mixed and modified porous dies and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment five
Earlier Graphene in the above-mentioned prescription was put in air dry oven 125 degree roasting 4 hours; Polymeric amide was put in air dry oven 100 degree roasting 4 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 and carry out mixed and modified porous dies and extrude slivering by head; Open at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment six
Earlier aluminum oxide, Graphene in the above-mentioned prescription were put in air dry oven 160 degree roasting 5 hours; Polyester PET was put in air dry oven 120 degree roasting 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 and carry out mixed and modified porous dies and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment seven
Earlier aluminum oxide, thomel in the above-mentioned prescription were put in air dry oven 160 degree roasting 5 hours; Polyester PBT was put in air dry oven 90 degree roasting 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 " type material ".
Embodiment eight
Earlier graphite, aluminum oxide in the above-mentioned prescription were put in air dry oven 125 degree roasting 5 hours; Polymeric amide was put in air dry oven 90 degree roasting 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 30 minutes and carry out mixed and modified porous dies and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment nine
Earlier silit, thomel in the above-mentioned prescription were put in air dry oven 160 degree roasting 5 hours; Polymeric amide was put in air dry oven 90 degree roasting 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 " type material ".
Embodiment ten
Earlier silit in the above-mentioned prescription was put in air dry oven 125 degree roasting 5 hours; Ppe was put in air dry oven 160 degree roasting 5 hours; Silit, ppe PPO and after functional agent mixes respectively then; Earlier measure in proportion to get into after the screw extrusion press plasticizing again the silit mixture measured in proportion and get into screw extrusion press and further plastify and be uniformly dispersed by ppe and functional agent mixture; Porous dies by head is extruded slivering, starts at last and earnestly carries out pelletizing, obtains granular " type material ".
Embodiment 11
Earlier silit, graphite in the above-mentioned prescription were put in air dry oven 125 degree roasting 5 hours; Polymeric amide was put in air dry oven 90 degree roasting 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 and carry out mixed and modified porous dies and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment 12
Earlier silit, aluminum oxide in the above-mentioned prescription were put in air dry oven 125 degree roasting 5 hours; Polymeric amide was put in air dry oven 90 degree roasting 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 and carry out mixed and modified porous dies and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment 13
Earlier aluminum oxide, sapphire whisker in the above-mentioned prescription were put in air dry oven 160 degree roasting 5 hours; Vestolen PP 7052 was put in air dry oven 90 degree roasting 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 " type material ".
Embodiment 14
Earlier SP 1, aluminum oxide in the above-mentioned prescription were put in air dry oven 125 degree roasting 5 hours; Polymeric amide was put in air dry oven 90 degree roasting 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 30 minutes and carry out mixed and modified porous dies and extrude slivering by head; Last tie rod cooling and dicing obtains granular " type material ".
Embodiment 15
Earlier SP 1, zinc oxide in the above-mentioned prescription were put in air dry oven 125 degree roasting 5 hours; Polymeric amide was put in air dry oven 90 degree roasting 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 30 minutes and carry out mixed and modified porous dies and extrude slivering by head; Last tie rod cooling and dicing obtains granular " type material ".
Embodiment 16
Earlier zinc oxide, zinc oxide fiber in the above-mentioned prescription were put in air dry oven 160 degree roasting 8 hours; Heat-resistant polyamide was put in air dry oven 120 degree roasting 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, zinc oxide fiber adds through the side feeding place of twin screw extruder and carries out mixed and modifiedly, extrudes slivering by the porous dies of head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment 17
Earlier ceramics powder in the above-mentioned prescription was put in air dry oven 160 degree roasting 5 hours; LCP was put in air dry oven 160 degree roasting 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 and carry out mixed and modified porous dies and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment 18
Earlier SP 1 in the above-mentioned prescription was put in air dry oven 160 degree roasting 5 hours; Heat-resistant polyamide was put in air dry oven 90 degree roasting 5 hours; SP 1, heat-resistant polyamide and after functional agent mixes respectively then; Earlier measure in proportion to get into after the screw extrusion press plasticizing again and the SP 1 mixture is measured the entering screw extrusion press in proportion further plastify the porous dies that is uniformly dispersed by head and extrude slivering by heat-resistant polyamide and functional agent mixture; Last tie rod cooling and dicing obtains granular " type material ".
Embodiment 19
Earlier aluminium nitride AlN in the above-mentioned prescription was put in air dry oven 160 degree roasting 5 hours; LCP was put in air dry oven 90 degree roasting 5 hours; Aluminium nitride AlN, LCP and after functional agent mixes are respectively then measured in proportion to get into after the screw extrusion press plasticizing aluminium nitride AlN mixture measured in proportion by LCP and functional agent mixture earlier again and get into screw extrusion press and further plastify and be uniformly dispersed, and extrude slivering by the porous dies of head; Last tie rod cooling and dicing obtains granular " type material ".
Embodiment 20
Earlier ceramics powder, SP 1 in the above-mentioned prescription were put in air dry oven 160 degree roasting 5 hours; LCP was put in air dry oven 90 degree roasting 5 hours; Then load weighted each raw material is put in the Banbury mixer and opens the temperature banburying and get into the mixed and modified porous dies of twin screw extruder after 18 minutes and extrude slivering by head; Start at last and earnestly carry out pelletizing, obtain granular " type material ".
Embodiment 21
Earlier metal-powder in the above-mentioned prescription was put in air dry oven 160 degree roasting 5 hours; Heat-resistant polyamide was put in air dry oven 120 degree roasting 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 and carry out mixed and modified; Porous dies by head is extruded slivering, and last tie rod cooling and dicing obtains granular " type material ".
Embodiment 21
Earlier metal-powder in the above-mentioned prescription was put in air dry oven 160 degree roasting 5 hours; LCP was put in air dry oven 120 degree roasting 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 and carry out mixed and modified; Porous dies by head is extruded slivering, and last tie rod cooling and dicing obtains granular " type material ".
The correlated parameters of type material that this instance provided and plastics is seen table 1.
Granular " type material " is injection molded into ISO test product or Lamp cup (scatterer) as test block.Electrical performance testing is used the PC68 megger, goes up marine Electronic Instruments Plant far away; The thermal conductivity test is with HOT-DISK TPS1500 thermal conductivity test appearance; The GWFI flame retardant resistance requires test according to UL.
Table 1
The above embodiment has only been expressed one embodiment of the present invention, but can not therefore be interpreted as limitation of the scope of the invention.Should be pointed out that for a person skilled in the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (8)
1. type material that is used to reduce the LED junction temperature is characterized in that it comprises following components in part by weight:
50%～90% a kind of or compound two or more inorganics component A with high pass and the high thermal properties of loosing;
5%～48% a kind of or compound two or more plastic fraction B;
2%～20% functional agent component C.
2. type material according to claim 1 is characterized in that: said component A comprises the carbon class, carbon compound, burning or nitride-based, one or more compsns of the powder of metal-powder class or fiber.
3. type material according to claim 2; It is characterized in that: said carbon class is graphite, Graphene, carbon nanotube; Said carbon compound is a silit; Said burning or nitride-based be aluminum oxide, ceramics powder, zinc oxide, SP 1, aluminium nitride AlN, said metal-powder class is silver powder, copper powder, aluminium powder.
4. according to the described type material of claim 1-3, it is characterized in that: said component A also comprises following components in part by weight:
40%～60% a kind of or compound two or more order number is 50～300 the inorganics with high pass and the high thermal properties of loosing;
10%～50% a kind of or compound two or more order number is 300～1250 the inorganics with high pass and the high thermal properties of loosing;
10%～30% a kind of or compound two or more be 1250 inorganics more than or equal to the order number with high pass and the high thermal properties of loosing.
5. type material according to claim 1 is characterized in that: said B component comprises Vestolen PP 7052, polyester, polymeric amide, polyphenylene sulfide, ppe, heat-resistant polyamide, LCP.
6. type material according to claim 1 is characterized in that: said component C comprises coupling agent or compatilizer, fire retardant, stablizer, lubricant.
7. type material according to claim 6 is characterized in that:
Said coupling agent or compatilizer comprise in silicane, titanate ester, aluminium esters of gallic acid, low sticking cyclic polyester resin CBT class, maleic anhydride grafts, the GMA glycidyl ether grafts a kind of or compound two or more;
Said fire retardant comprises bromide fire retardant, antimony is a kind of or compound two or more in synergistic flame retardant, phosphorus flame retardant, the nitrogen flame retardant;
Said stablizer comprises among antioxygen 1010, antioxygen 168, antioxygen H161, the antioxygen SEED a kind of or compound two or more;
Said lubricant comprises in wax class, the stearate class a kind of or compound two or more.
8. preparation technology like the described type material of claim 1-8 is characterized in that it comprises following algorithm:
(1) main material heat drying;
(2) organic with after inorganics mixes respectively in proportion the branch succession be metered into or mix internal mixing and plasticizing bonding back entirely and add;
(3) the screw extrusion press plasticizing is uniformly dispersed;
(4) porous dies is extruded slivering;
(5) die head hot cut pellet or tie rod cooling and dicing;
(6) injection moulding.
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Cited By (32)
| Publication number | Priority date | Publication date | Assignee | Title |
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