CN103602060B - Heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof - Google Patents
Heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof Download PDFInfo
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- CN103602060B CN103602060B CN201310541445.6A CN201310541445A CN103602060B CN 103602060 B CN103602060 B CN 103602060B CN 201310541445 A CN201310541445 A CN 201310541445A CN 103602060 B CN103602060 B CN 103602060B
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- heat
- insulating
- heat conduction
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
Abstract
The present invention relates to a kind of heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof, described material is prepared from the following raw materials in parts by weight: PA6 20 50%, threadiness heat filling 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%, antioxidant 0.2 0.5%, lubricant 0.2 0.5%.The present invention uses different-grain diameter, difformity, the heat filling of different draw ratio to compound so that filler is more evenly distributed in plastic substrate, and heat conduction network is more likely formed.The present invention uses low feeding, the expressing technique of high shear, makes extruder be in " starvation ", to reach filler dispersion effect evenly.The present invention add threadiness heat filling time, use single screw extrusion machine, the shearing to fiber is less, damage less, simultaneously secondary cross machine can make filler disperse more uniform；The present invention has the features such as good heat conduction effect, anti-wear performance excellence and workability.
Description
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 circuit board large scale integration and the fast development of micro-packaging technology, electronic devices and components volume constantly reduces,
Packing density is more and more higher, and power is constantly increasing, and caloric value also increases therewith.Therefore, heat radiation becomes in electronics industry one
Individual major issue, has the metal of excellent heat conductivity performance, pottery and material with carbon element, owing to electrical insulating property or machine-shaping property are poor
Restriction, be difficult to meet the demand of modern electronics industry.Nylon 6 has superior combination property, including mechanical strength, just
Degree, toughness, mechanical shock absorption and wearability.These characteristics, add good electrical isolation capabilities and chemical resistance, make nylon 6
It is widely used, but its thermal conductivity is relatively low, only 0.30 W/m K, limit it in heat radiation, the application in heat conduction field.
For the situation that nylon guide heating rate is low, Chinese scholars has done substantial amounts of research, and existing frequently-used method is to add
Heat filling is to reach to improve the purpose of nylon guide heating rate, but is all difficult to accomplish thermal conductivity, mechanical property, electrical insulation capability and resistance to
Mill performance is the most excellent, and majority can only accomplish wherein one or two excellent performance.
Patent CN1775860A describes one and can be used for injection molding moulded heat-conductive insulated plastics, utilizes big particle diameter heat conduction to fill out
Compounding of the heat filling of material and small particle, it is possible to obtaining thermal conductivity is 3.469 W/m k, has certain mechanical property and processing
The moulded heat-conductive insulated plastics of performance.But its mechanical property and anti-wear performance all lose bigger.
Summary of the invention
An object of the present invention is for deficiency of the prior art, it is provided that a kind of heat conduction abrasion-proof insulating nylon 6 is multiple
Condensation material.
The two of the purpose of the present invention are to provide the preparation method of this heat conduction abrasion-proof insulating nylon 6 composite material a kind of.
For achieving the above object, the present invention adopts the technical scheme that:
A kind of heat conduction resistance to insulation mill nylon 6 composite material, it is characterised in that the composition of this composite i.e. percent mass contains
Measure as follows:
PA6 20-50%,
Threadiness heat filling 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%,
Antioxidant 0.2-0.5%,
Lubricant 0.2-0.5%；
The weight/mass percentage composition sum of the most each component is 100%.
The relative viscosity of above-mentioned nylon 6 is 2.40-3.43.
Above-mentioned fibrous heat filling is carbon fiber.
Above-mentioned insulating heat-conductive powder A is at least one in carborundum, magnesia, aluminum oxide, and particle diameter is in 50～100 μm.
Above-mentioned insulating heat-conductive powder B is at least one in boron nitride, magnesia, aluminum oxide, and particle diameter is in 1-10 μm.
Above-mentioned heat conduction abrasion-resistant powder is at least one in expanded graphite, crystalline flake graphite, and particle diameter is in 50-200 μm.
Above-mentioned coupling agent is at least one in silanes, titanate ester or aluminate coupling agent.
Above-mentioned compatilizer is CMG9805.
Above-mentioned antioxidant be Hinered phenols antioxidant or antioxidant 1010 compounding with phosphite ester kind antioxidant and antioxygen
Agent 168 compounds.
Above-mentioned lubricant is silicone powder MB-4 or TAF.
A kind of method preparing above-mentioned heat conduction abrasion-proof insulating PA6 composite, it is characterised in that the concrete step of the method
Suddenly it is:
A. by PA6 raw material stoving；
B. it is sufficiently mixed uniformly for insulating heat-conductive powder A, insulating heat-conductive powder B, heat conduction abrasion-resistant powder and coupling agent, obtains heat conduction and fill out
Material；
C. threadiness heat filling is immersed in 30min in coupling agent, takes out standby；
D. by step b gained heat filling and PA6, compatilizer, antioxidant, mix lubricant uniformly after, extruded water-cooled
Granulation, the frequency of main frame is 35-45Hz, and feeding frequency is 5-11Hz, and temperature is 215-235 DEG C, obtains a granulation material；
E. by dried for granulation material of step d gained extruding pelletization together with step c gained threadiness heat filling,
Obtain heat conduction abrasion-proof insulating PA6 composite..
The invention has the advantages that:
1, nylon 6 composite material prepared by this method, volume resistance can reach 1012Ω*cm；
2, nylon 6 composite material prepared by this method, it is ensured that volume resistance can reach 1012While Ω * cm, its thermal conductance
Rate is up to 6 W/m K.
3, nylon 6 composite material prepared by this method, in the case of ensureing above-mentioned 2 performances, nylon 6 composite material
Coefficient of friction can reach 0.13.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, but scope of the present invention is not
It is confined to the scope described in embodiment.
Embodiment 1
(1) raw material: PA6:20% is weighed by weight ratio, 50 μm magnesia 30%, 3 μm aluminum oxide 10%, 50 μm scale stones
Ink 10%, carbon fiber 25%, Compatibilizer C MG9805 3.5% silane coupler 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesia, aluminum oxide, crystalline flake graphite joins in high-speed mixer, is subsequently adding silane coupler
Mix standby.
(3) the above-mentioned heat filling mixed is joined high-speed mixer together with PA6, processing aid, compatilizer
In mix, join in twin-screw extrusion owner's hello barrel.
(4) above-mentioned material is through double screw extruder extrusion granulation, obtains a granulation material, and the frequency of twin-screw main frame is
42Hz, feeding frequency is 7Hz, and temperature is 225 DEG C.
(5) granulation material is joined Single screw extrusion owner's hello barrel, together with the carbon fiber good with coupling agent treatment
Extruding pelletization, obtains the moulded heat-conductive insulated plastics for injection mo(u)lding.
Embodiment 2
((1) weighs raw material: PA6:30%, 50 μm aluminum oxide 20%, 3 μm boron nitride 10%, 50 μm scales by weight ratio
Graphite 15%, carbon fiber 20%, Compatibilizer C MG9805 3.5% silane coupler 1.5%, MB-4 0.2%, 168/1010
0.4%。
(2) by above-mentioned aluminum oxide, boron nitride, crystalline flake graphite joins in high-speed mixer, is subsequently adding silane coupler
Mix standby.
(3) the above-mentioned heat filling mixed is joined high-speed mixer together with PA6, processing aid, compatilizer
In mix, join in twin-screw extrusion owner's hello barrel.
(4) above-mentioned material is through double screw extruder extrusion granulation, obtains a granulation material, and the frequency of twin-screw main frame is
40Hz, feeding frequency is 9Hz, and temperature is 235 DEG C.
(5) granulation material is joined Single screw extrusion owner's hello barrel, together with the carbon fiber good with coupling agent treatment
Extruding pelletization, obtains the moulded heat-conductive insulated plastics for injection mo(u)lding.
Embodiment 3
(1) weighing raw material: PA6:40% by weight ratio, 50 μm magnesia 20%, 5 μm magnesia 10%, 50 μm expand stone
Ink 10%, carbon fiber 15%, Compatibilizer C MG9805 3.5% silane coupler 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesia, expanded graphite joins in high-speed mixer, is subsequently adding silane coupler and mixes
Standby.
(3) the above-mentioned heat filling mixed is joined high-speed mixer together with PA6, processing aid, compatilizer
In mix, join in twin-screw extrusion owner's hello barrel.
(4) above-mentioned material is through double screw extruder extrusion granulation, obtains a granulation material, and the frequency of twin-screw main frame is
40Hz, feeding frequency is 10Hz, and temperature is 235 DEG C.
(5) granulation material is joined Single screw extrusion owner's hello barrel, together with the carbon fiber good with coupling agent treatment
Extruding pelletization, obtains the moulded heat-conductive insulated plastics for injection mo(u)lding.
Embodiment 4
(1) weighing raw material: PA6:50% by weight ratio, 50 μm carborundum 20%, 3 μm boron nitride 10%, 50 μm expand stone
Ink 5%, carbon fiber 10%, Compatibilizer C MG9805 3.5% silane coupler 1.5%, TAF 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned carborundum, boron nitride, expanded graphite joins in high-speed mixer, is subsequently adding silane coupler
Mix standby.
(3) the above-mentioned heat filling mixed is joined high-speed mixer together with PA6, processing aid, compatilizer
In mix, join in twin-screw extrusion owner's hello barrel.
(4) above-mentioned material is through double screw extruder extrusion granulation, obtains a granulation material, and the frequency of twin-screw main frame is
45Hz, feeding frequency is 10Hz, and temperature is 215 DEG C.
(5) granulation material is joined Single screw extrusion owner's hello barrel, together with the carbon fiber good with coupling agent treatment
Extruding pelletization, obtains the moulded heat-conductive insulated plastics for injection mo(u)lding.
Comparative example 1
(1) weighing raw material: PA6:40% by weight ratio, 50 μm magnesia 20%, 5 μm magnesia 10%, 50 μm expand stone
Ink 15%, carbon fiber 10%, Compatibilizer C MG9805 3.5% silane coupler 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesia, expanded graphite joins in high-speed mixer, is subsequently adding silane coupler and mixes
Standby.
(3) the above-mentioned heat filling mixed is joined high-speed mixer together with PA6, processing aid, compatilizer
In mix, join in twin-screw extrusion owner's hello barrel.
(4) above-mentioned material is through double screw extruder extrusion granulation, obtains a granulation material, and the frequency of twin-screw main frame is
40Hz, feeding frequency is 10Hz, and temperature is 235 DEG C.
(5) granulation material is joined Single screw extrusion owner's hello barrel, together with the carbon fiber good with coupling agent treatment
Extruding pelletization, obtains the moulded heat-conductive insulated plastics for injection mo(u)lding.
Comparative example 2
(1) weighing raw material: PA6:40% by weight ratio, 50 μm magnesia 20%, 5 μm magnesia 10%, 50 μm expand stone
Ink 15%, carbon fiber 10%, Compatibilizer C MG9805 3.5% silane coupler 1.5%, MB-4 0.2%, 16,8/1,010 0.4%.
(2) by above-mentioned magnesia, expanded graphite joins in high-speed mixer, is subsequently adding silane coupler and mixes
Standby.
(3) the above-mentioned heat filling mixed is joined high-speed mixer together with PA6, processing aid, compatilizer
In mix, join in twin-screw extrusion owner's hello barrel.
(4) through double screw extruder extrusion granulation together with the carbon fiber that above-mentioned material is good with coupling agent treatment, used
In the moulded heat-conductive insulated plastics of injection mo(u)lding, the frequency of twin-screw main frame is 40Hz, and feeding frequency is 10Hz, and temperature is 235 DEG C.
The physical property of the wear-resisting PA6 of heat conductive insulating prepared by comparative example 1-2 and embodiment 1-4 see table 1.
The physical property of the wear-resisting PA6 of heat conductive insulating prepared by table 1 comparative example 1-2 and embodiment 1-5
The present invention uses special processing technology and suitable compatilizer, improves PA6 and heat filling and heat conducting fiber
Between compatibility, optimize the processing characteristics of alloy and the dispersiveness of filler；This heat conduction abrasion-proof insulating nylon 6 composite material has
There are the advantages such as good mechanical property, wearability, insulating properties, high heat conduction and easy machine-shaping.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
Member, on the premise of without departing from the inventive method, it is also possible to makes some improvement and supplements, and these improve and supplement and also should be regarded as
Protection scope of the present invention.
Claims (3)
1. heat conductive insulating wear resistant nylon 6 composite, it is characterised in that the composition of this composite and weight/mass percentage composition
As follows:
PA6 20-50%,
Threadiness heat filling 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%,
Antioxidant 0.2-0.5%,
Lubricant 0.2-0.5%
The weight/mass percentage composition sum of the most each component is 100%；
The relative viscosity of described nylon 6 is 2.40-3.43, and described fibrous heat filling is carbon fiber, described insulation
Conductive powder A is at least one in carborundum, magnesia, aluminum oxide, and particle diameter at 50-100 μm, described insulating heat-conductive powder B is
At least one in boron nitride, magnesia, aluminum oxide, particle diameter is expanded graphite, scale at 1-10 μm, described heat conduction abrasion-resistant powder
At least one in graphite, particle diameter is in 50-200 μm, and described coupling agent is silanes, titanate ester or aluminate coupling agent
In at least one；Described antioxidant is that antioxidant 1010 compounds with irgasfos 168, and described lubricant is silicone powder MB-4
Or TAF.
Heat conductive insulating wear resistant nylon 6 composite the most according to claim 1, it is characterised in that described compatilizer is
CMG9805。
3. a preparation method for heat conductive insulating wear resistant nylon 6 composite according to claim 1 and 2, its feature exists
Concretely comprising the following steps in the method:
A. by PA6 raw material stoving；
B. insulating heat-conductive powder A, insulating heat-conductive powder B, heat conduction abrasion-resistant powder and coupling agent are sufficiently mixed uniformly, obtain heat filling；
C. threadiness heat filling is immersed in 30min in coupling agent, takes out standby；
D. by step b gained heat filling and PA6, compatilizer, antioxidant, mix lubricant uniformly after, extruded water-cooled granulation,
The frequency of main frame is 35 ~ 45Hz, and feeding frequency is 5 ~ 11Hz, and temperature is 215 ~ 235 DEG C, obtains a granulation material；
E. by dried for granulation material of step d gained together with step c gained threadiness heat filling through single screw extrusion machine
Extruding pelletization, obtains heat conductive insulating wear resistant nylon 6 composite.
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| CN201310541445.6A CN103602060B (en) | 2013-11-06 | 2013-11-06 | Heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof |
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| CN201310541445.6A CN103602060B (en) | 2013-11-06 | 2013-11-06 | Heat conduction abrasion-proof insulating nylon 6 composite material and preparation method thereof |
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| CN103602060B true CN103602060B (en) | 2016-08-17 |
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