CN103602060A - Heat-conducting, wear-resistant and insulated nylon 6 composite material and preparation method thereof - Google Patents

Heat-conducting, wear-resistant and insulated nylon 6 composite material and preparation method thereof Download PDF

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CN103602060A
CN103602060A CN201310541445.6A CN201310541445A CN103602060A CN 103602060 A CN103602060 A CN 103602060A CN 201310541445 A CN201310541445 A CN 201310541445A CN 103602060 A CN103602060 A CN 103602060A
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heat
heat conduction
conducting
insulating
matrix material
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CN103602060B (en
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刘引烽
周海堤
赵凯凯
房嫄
杨小瑞
李琛骏
邵红娟
王尹杰
孟成铭
陈晓东
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University of Shanghai for Science and Technology
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
    • C08L77/02Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B9/00Making granules
    • B29B9/02Making granules by dividing preformed material
    • B29B9/06Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00Specific properties of additives
    • C08K2201/002Physical properties
    • C08K2201/003Additives being defined by their diameter

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Abstract

The invention relates to a heat-conducting, wear-resistant and insulated nylon 6 composite material and a preparation method thereof. The material is composed of the following raw materials in percentage by weight: 20-50% of PA 6, 10-30% of fibrous heat-conducting fillers, 15-30% of insulated heat-conducting powder A, 5-10% of insulated heat-conducting powder B, 5-15% of heat-conducting wear-resistant powder, 0.75-1.5% of coupling agent, 3-10% of compatibilizer, 0.2-0.5% of antioxidant and 0.2-0.5% of lubricant. According to the heat-conducting, wear-resistant and insulated nylon 6 composite material provided by the invention, heat-conducting fillers with different particle sizes, different shapes and different draw ratios are compounded so that the fillers are more uniformly distributed in a plastic matrix so as to form a heat-conducting network more easily. Since a low-feeding high-shearing extrusion process is used in the invention, an extruder is at a hungry state to achieve an effect of dispersing the fillers more uniformly. When the fibrous heat conducting fillers are added, a single screw extruder is used, so that the fibers can be sheared into smaller size, the damage is smaller, and meanwhile, the fillers are dispersed more uniformly by extruding the fillers by the extruder for the second time; and the heat-conducting, wear-resistant and insulated nylon 6 composite material provided by the invention has the advantages of good heat conducting effect, excellent wear resistance, easy workability, etc.

Description

Heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof
Technical field
The present invention relates to a kind of heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof.
Background technology
Along with the fast development of circuit card large scale integration and micro-packaging technology, electronic devices and components volume constantly dwindles, and packing density is more and more higher, and power is in continuous increase, and thermal value also increases thereupon.Therefore, heat radiation becomes a major issue in electronic industry, has metal, pottery and the carbon material of excellent heat conductivity performance, due to electrical insulating property or the poor restriction of machine-shaping property, has been difficult to meet the demand of hyundai electronics industry.Nylon 6 has superior over-all properties, comprises physical strength, rigidity, toughness, mechanical shock absorption and wear resistance.These characteristics, add good electrical isolation capabilities and chemical resistant properties, nylon 6 is widely used, but its thermal conductivity are lower, only have 0.30 W/mK, have limited its application in heat radiation, heat conduction field.
For the low situation of nylon guide heating rate, Chinese scholars has been done a large amount of research, conventional method is to add heat conductive filler to reach the object that improves nylon guide heating rate now, but be all difficult to accomplish that thermal conductivity, mechanical property, electrical insulation capability and wear resisting property are all very excellent, majority can only be accomplished wherein one or two excellent performance.
Patent CN1775860A has introduced a kind of injection molding moulded heat-conductive insulated plastics that can be used for, utilize heat conductive filler composite of large particle diameter heat conductive filler and small particle size, can access thermal conductivity is 3.469 W/mk, has the moulded heat-conductive insulated plastics of certain mechanical property and processing characteristics.It is larger that but its mechanical property and wear resisting property all lose.
Summary of the invention
One of object of the present invention is for deficiency of the prior art, and a kind of heat conduction abrasion-proof insulating nylon 6 composite material is provided.
Two of object of the present invention is to provide a kind of preparation method of this heat conduction abrasion-proof insulating nylon 6 composite material.
For achieving the above object, the technical scheme that the present invention takes is:
The resistance to insulation mill of a heat conduction nylon 6 composite material, the composition that it is characterized in that this matrix material is that quality percentage composition is as follows:
PA6 20-50%,
Fibrous heat conductive filler 10-30%,
Insulating heat-conductive powder A 15-30%,
Insulating heat-conductive powder B 5-10%,
Heat conduction abrasion-resistant powder 5-15%,
Coupling agent 0.75-1.5%,
Compatilizer 3-10%,
Oxidation inhibitor 0.2-0.5%,
Lubricant 0.2-0.5%;
The quality percentage composition sum of each component is 100% above.
The relative viscosity of above-mentioned nylon 6 is 2.40-3.43.
Above-mentioned fibrous heat conductive filler is carbon fiber.
Above-mentioned insulating heat-conductive powder A is at least one in silicon carbide, magnesium oxide, aluminum oxide, and particle diameter is at 50~100 μ m.
Above-mentioned insulating heat-conductive powder B is at least one in boron nitride, magnesium oxide, aluminum oxide, and particle diameter is at 1-10 μ m.
Above-mentioned heat conduction abrasion-resistant powder is at least one in expanded graphite, crystalline flake graphite, and particle diameter is at 50-200 μ m.
Above-mentioned coupling agent is at least one in silicane, titanate ester or aluminate coupling agent.
Above-mentioned compatilizer is CMG9805.
Above-mentioned oxidation inhibitor be Hinered phenols antioxidant and phosphite ester kind antioxidant is composite or antioxidant 1010 and irgasfos 168 composite.
Above-mentioned lubricant is silicone powder MB-4 or TAF.
A method of preparing above-mentioned heat conduction abrasion-proof insulating PA6 matrix material, is characterized in that the concrete steps of the method are:
A. by PA6 raw material stoving;
B. for insulating heat-conductive powder A, insulating heat-conductive powder B, heat conduction abrasion-resistant powder and coupling agent fully mix, obtain heat conductive filler;
C. fibrous heat conductive filler is immersed in to 30min in coupling agent, takes out standby;
D. by step b gained heat conductive filler and PA6, compatilizer, oxidation inhibitor, mix lubricant evenly after, through extruding water-cooled granulation, the frequency of main frame is 35-45Hz, feeding frequency is 5-11Hz, temperature is 215-235 ℃, obtains granulation material one time;
E. by the dry extruding pelletization together with the fibrous heat conductive filler of step c gained afterwards of granulation material of steps d gained, obtain heat conduction abrasion-proof insulating PA6 matrix material.。
The invention has the advantages that:
1, the nylon 6 composite material that prepared by present method, volume resistance can reach 10 12Ω * cm;
2, the nylon 6 composite material that prepared by present method, guarantees that volume resistance can reach 10 12in the time of Ω * cm, its thermal conductivity can reach 6 W/mK.
3, the nylon 6 composite material that prepared by present method, in the situation that guaranteeing above-mentioned 2 performances, the frictional coefficient of nylon 6 composite material can reach 0.13.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but the present invention's scope required for protection is not limited to the scope that embodiment records.
embodiment 1
(1) take by weight ratio raw material: PA6:20%, 50 μ m magnesium oxide 30%, 3 μ m aluminum oxide 10%, 50 μ m crystalline flake graphites 10%, carbon fiber 25%, Compatibilizer C MG9805 3.5% silane coupling agent 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesium oxide, aluminum oxide, crystalline flake graphite joins in high-speed mixer, then adds silane coupling agent to mix standby.
(3) the above-mentioned heat conductive filler mixing is joined in high-speed mixer and mixed together with PA6, processing aid, compatilizer, join in twin-screw extrusion owner hello barrel.
(4) above-mentioned material is extruded and granulation through twin screw extruder, obtains granulation material one time, and the frequency of twin screw main frame is 42Hz, and feeding frequency is 7Hz, and temperature is 225 ℃.
(5) a granulation material is joined to the main hello barrel of single screw extrusion machine, extruding pelletization together with the carbon fiber good with coupling agent treatment, obtains the moulded heat-conductive insulated plastics for injection moulding.
embodiment 2
((1) takes raw material: PA6:30% by weight ratio, 50 μ m aluminum oxide 20%, 3 μ m boron nitride 10%, 50 μ m crystalline flake graphites 15%, and carbon fiber 20%, Compatibilizer C MG9805 3.5% silane coupling agent 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned aluminum oxide, boron nitride, crystalline flake graphite joins in high-speed mixer, then adds silane coupling agent to mix standby.
(3) the above-mentioned heat conductive filler mixing is joined in high-speed mixer and mixed together with PA6, processing aid, compatilizer, join in twin-screw extrusion owner hello barrel.
(4) above-mentioned material is extruded and granulation through twin screw extruder, obtains granulation material one time, and the frequency of twin screw main frame is 40Hz, and feeding frequency is 9Hz, and temperature is 235 ℃.
(5) a granulation material is joined to the main hello barrel of single screw extrusion machine, extruding pelletization together with the carbon fiber good with coupling agent treatment, obtains the moulded heat-conductive insulated plastics for injection moulding.
embodiment 3
(1) take by weight ratio raw material: PA6:40%, 50 μ m magnesium oxide 20%, 5 μ m magnesium oxide 10%, 50 μ m expanded graphites 10%, carbon fiber 15%, Compatibilizer C MG9805 3.5% silane coupling agent 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesium oxide, expanded graphite joins in high-speed mixer, then adds silane coupling agent to mix standby.
(3) the above-mentioned heat conductive filler mixing is joined in high-speed mixer and mixed together with PA6, processing aid, compatilizer, join in twin-screw extrusion owner hello barrel.
(4) above-mentioned material is extruded and granulation through twin screw extruder, obtains granulation material one time, and the frequency of twin screw main frame is 40Hz, and feeding frequency is 10Hz, and temperature is 235 ℃.
(5) a granulation material is joined to the main hello barrel of single screw extrusion machine, extruding pelletization together with the carbon fiber good with coupling agent treatment, obtains the moulded heat-conductive insulated plastics for injection moulding.
embodiment 4
(1) take by weight ratio raw material: PA6:50%, 50 μ m silicon carbide 20%, 3 μ m boron nitride 10%, 50 μ m expanded graphites 5%, carbon fiber 10%, Compatibilizer C MG9805 3.5% silane coupling agent 1.5%, TAF 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned silicon carbide, boron nitride, expanded graphite joins in high-speed mixer, then adds silane coupling agent to mix standby.
(3) the above-mentioned heat conductive filler mixing is joined in high-speed mixer and mixed together with PA6, processing aid, compatilizer, join in twin-screw extrusion owner hello barrel.
(4) above-mentioned material is extruded and granulation through twin screw extruder, obtains granulation material one time, and the frequency of twin screw main frame is 45Hz, and feeding frequency is 10Hz, and temperature is 215 ℃.
(5) a granulation material is joined to the main hello barrel of single screw extrusion machine, extruding pelletization together with the carbon fiber good with coupling agent treatment, obtains the moulded heat-conductive insulated plastics for injection moulding.
comparative example 1
(1) take by weight ratio raw material: PA6:40%, 50 μ m magnesium oxide 20%, 5 μ m magnesium oxide 10%, 50 μ m expanded graphites 15%, carbon fiber 10%, Compatibilizer C MG9805 3.5% silane coupling agent 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesium oxide, expanded graphite joins in high-speed mixer, then adds silane coupling agent to mix standby.
(3) the above-mentioned heat conductive filler mixing is joined in high-speed mixer and mixed together with PA6, processing aid, compatilizer, join in twin-screw extrusion owner hello barrel.
(4) above-mentioned material is extruded and granulation through twin screw extruder, obtains granulation material one time, and the frequency of twin screw main frame is 40Hz, and feeding frequency is 10Hz, and temperature is 235 ℃.
(5) a granulation material is joined to the main hello barrel of single screw extrusion machine, extruding pelletization together with the carbon fiber good with coupling agent treatment, obtains the moulded heat-conductive insulated plastics for injection moulding.
comparative example 2
(1) take by weight ratio raw material: PA6:40%, 50 μ m magnesium oxide 20%, 5 μ m magnesium oxide 10%, 50 μ m expanded graphites 15%, carbon fiber 10%, Compatibilizer C MG9805 3.5% silane coupling agent 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesium oxide, expanded graphite joins in high-speed mixer, then adds silane coupling agent to mix standby.
(3) the above-mentioned heat conductive filler mixing is joined in high-speed mixer and mixed together with PA6, processing aid, compatilizer, join in twin-screw extrusion owner hello barrel.
(4) together with the carbon fiber that above-mentioned material is good with coupling agent treatment, through twin screw extruder, extrude and granulation, obtain the moulded heat-conductive insulated plastics for injection moulding, the frequency of twin screw main frame is 40Hz, and feeding frequency is 10Hz, and temperature is 235 ℃.
The physicals of the wear-resisting PA6 of heat conductive insulating prepared by comparative example 1-2 and embodiment 1-4 sees the following form 1.
The physicals of the wear-resisting PA6 of heat conductive insulating prepared by table 1 comparative example 1-2 and embodiment 1-5
Figure 847206DEST_PATH_IMAGE001
The present invention adopts special complete processing and suitable compatilizer, has improved the consistency between PA6 and heat conductive filler and heat conducting fiber, has optimized the processing characteristics of alloy and the dispersiveness of filler; This heat conduction abrasion-proof insulating nylon 6 composite material has the advantages such as good mechanical property, wear resistance, insulativity, high heat conduction and easy machine-shaping.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the inventive method; can also make some improvement and supplement, these improvement and supplement and also should be considered as protection scope of the present invention.

Claims (11)

1. a nylon 6 composite material is ground in the resistance to insulation of heat conduction, and the composition that it is characterized in that this matrix material is that quality percentage composition is as follows:
PA6 20-50%,
Fibrous heat conductive filler 10-30%,
Insulating heat-conductive powder A 15-30%,
Insulating heat-conductive powder B 5-10%,
Heat conduction abrasion-resistant powder 5-15%,
Coupling agent 0.75-1.5%,
Compatilizer 3-10%,
Oxidation inhibitor 0.2-0.5%,
Lubricant 0.2-0.5%;
The quality percentage composition sum of each component is 100% above.
2. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that the relative viscosity of described nylon 6 is 2.40-3.43.
3. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that described fibrous heat conductive filler is carbon fiber.
4. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that described insulating heat-conductive powder A is at least one in silicon carbide, magnesium oxide, aluminum oxide, and particle diameter is at 50~100 μ m.
5. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that described insulating heat-conductive powder B is at least one in boron nitride, magnesium oxide, aluminum oxide, and particle diameter is at 1-10 μ m.
6. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that described heat conduction abrasion-resistant powder is at least one in expanded graphite, crystalline flake graphite, and particle diameter is at 50-200 μ m.
7. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that described coupling agent is at least one in silicane, titanate ester or aluminate coupling agent.
8. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that described compatilizer is CMG9805.
9. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, it is characterized in that described oxidation inhibitor be Hinered phenols antioxidant and phosphite ester kind antioxidant is composite or antioxidant 1010 and irgasfos 168 composite.
10. heat conduction abrasion-proof insulating PA6 matrix material according to claim 1, is characterized in that described lubricant is silicone powder MB-4 or TAF.
Prepare according to the method for the heat conduction abrasion-proof insulating PA6 matrix material described in any one in claim 1-10, its spy for 11. 1 kinds
Levy and be that the concrete steps of the method are:
A. by PA6 raw material stoving;
B. for insulating heat-conductive powder A, insulating heat-conductive powder B, heat conduction abrasion-resistant powder and coupling agent fully mix, obtain heat conductive filler;
C. fibrous heat conductive filler is immersed in to 30min in coupling agent, takes out standby;
D. by step b gained heat conductive filler and PA6, compatilizer, oxidation inhibitor, mix lubricant evenly after, through extruding water-cooled granulation, the frequency of main frame is 35-45Hz, feeding frequency is 5-11Hz, temperature is 215-235 ℃, obtains granulation material one time;
E. by the dry extruding pelletization together with the fibrous heat conductive filler of step c gained afterwards of granulation material of steps d gained, obtain heat conduction abrasion-proof insulating PA6 matrix material.
CN201310541445.6A 2013-11-06 2013-11-06 Heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof Expired - Fee Related CN103602060B (en)

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CN104017331A (en) * 2014-05-23 2014-09-03 青岛科柏利高性能聚合物有限公司 Insulation heat-conduction plastic and preparation method thereof
CN104046002A (en) * 2014-07-10 2014-09-17 苏州新区华士达工程塑胶有限公司 Heat-conduction polyamide
CN104151707A (en) * 2014-08-13 2014-11-19 上海交通大学 Carbon fiber reinforced resin composite material with superior heat-conducting property and preparation method thereof
CN104387761A (en) * 2014-11-11 2015-03-04 惠州市沃特新材料有限公司 High-thermal conductivity polyamide composite material and preparation method thereof
CN104559145A (en) * 2014-12-16 2015-04-29 惠州力王佐信科技有限公司 High-toughness and high-thermal-conductivity polymer material and preparation method thereof
CN104559149A (en) * 2014-12-16 2015-04-29 惠州力王佐信科技有限公司 Carbon composite high-thermal-conductivity plastic material and preparation method thereof
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CN105111726A (en) * 2015-09-01 2015-12-02 南通拜林新材料科技有限公司 Heat conducting nylon composite material and preparation method thereof
CN105315668A (en) * 2014-05-27 2016-02-10 大信科技有限公司 Highly thermally conductive inorganic-polymer complex composition applied to lighting LED that contains expanded graphite and manufacturing method thereof
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CN104017331A (en) * 2014-05-23 2014-09-03 青岛科柏利高性能聚合物有限公司 Insulation heat-conduction plastic and preparation method thereof
CN104017331B (en) * 2014-05-23 2016-06-01 青岛瑞益信新材料科技有限公司 A kind of insulating and heat-conducting plastics and its preparation method
CN105315668A (en) * 2014-05-27 2016-02-10 大信科技有限公司 Highly thermally conductive inorganic-polymer complex composition applied to lighting LED that contains expanded graphite and manufacturing method thereof
CN104046002A (en) * 2014-07-10 2014-09-17 苏州新区华士达工程塑胶有限公司 Heat-conduction polyamide
CN104151707A (en) * 2014-08-13 2014-11-19 上海交通大学 Carbon fiber reinforced resin composite material with superior heat-conducting property and preparation method thereof
CN104387761A (en) * 2014-11-11 2015-03-04 惠州市沃特新材料有限公司 High-thermal conductivity polyamide composite material and preparation method thereof
CN104559145A (en) * 2014-12-16 2015-04-29 惠州力王佐信科技有限公司 High-toughness and high-thermal-conductivity polymer material and preparation method thereof
CN104559149A (en) * 2014-12-16 2015-04-29 惠州力王佐信科技有限公司 Carbon composite high-thermal-conductivity plastic material and preparation method thereof
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