CN105837911B - A kind of insulating heat-conductive CABLE MATERIALS and preparation method thereof - Google Patents
A kind of insulating heat-conductive CABLE MATERIALS and preparation method thereof Download PDFInfo
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C2948/00—Indexing scheme relating to extrusion moulding
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- B29C2948/9259—Angular velocity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
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- B29C2948/92704—Temperature
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Abstract
The invention discloses a kind of insulating heat-conductive CABLE MATERIALS, include the raw material of following parts by weight：60 70 parts of high density polyethylene (HDPE), 20 30 parts of modified polypropene, 15 25 parts of heat filling, 6 10 parts of polyolefin elastomer, 58 parts of glass fibre, 35 parts of compatilizer, 38 parts of boric acid modification zinc, 10 15 parts of ethylene vinyl acetate copolymer.The insulated cable material thermal conductivity is high, good insulation preformance, and tensile strength is high, and toughness is strong, is easy to process.
Description
Technical field
The invention belongs to field of cable technology, more particularly, to a kind of insulating heat-conductive CABLE MATERIALS and preparation method thereof.
Background technology
Electric wire includes bare wire, appliance equipment electric wire, power cable, communication cable and optical cable, winding wire, electricity
Cable material is being commonly called as wire cable insulating and sheath plastics, and high polymer material used mainly has polyvinyl chloride, polyethylene, poly- third
Alkene, fluoroplastics, chlorinated polyether and polyamide etc., this kind of high polymer material have lightweight, resistant to chemical etching, easy processing shaping, electricity
The features such as excellent insulation performance, excellent mechanics and anti-fatigue performance, but the thermal conductivity of this kind of material is very low, typically 0.1~
0.3W/（m·K）, almost heat insulator, radiating effect be poor, it is impossible in time distributes the heat in electric wire.
The A of Chinese patent CN 105017676 disclose the cable of graphene-containing with high heat conduction PVC sheath material and
Cable, sheath material of the present invention include the material of following mass fraction：100 parts of Corvic, 0.05~3 part of thermal conducting agent,
8~9 parts of auxiliary heat conduction agent, 20~25 parts of plasticizer, 0.1~0.5 part of antioxidant, 2.2~2.9 parts of stabilizer, lubricant 0.5~
3 parts, 37~53 parts of filler.The coat layer of power cable of the present invention is made up of following material：Corvic, thermal conducting agent, auxiliary
Thermal conducting agent, plasticizer, antioxidant, stabilizer, lubricant, filler, fire retardant, pigment auxiliary agent.The invention thermal conducting agent and auxiliary
Thermal conducting agent is used cooperatively the thermal conductivity that can significantly improve jacket layer material, but thermal conducting agent uses graphene or oxidation in the invention
Graphene is conductive material, may influence the insulating properties of sheath material, there is potential safety hazard.Chinese patent CN
103275357 B disclose a kind of heat conductive insulating power cable sheath pipe specific complex conductive powder and its production technology, each component
Formula be：Different-grain diameter aluminum oxide 40~60%, nanometer silicon carbide 5~25%, nano aluminum nitride 3~15%, nano zine oxide 2
~12%, nano magnesia 1~10%, nano-silicon nitride 4~10%, nm-class boron nitride 1~8%.Carborundum, nitridation in the conductive powder
Aluminium, zinc oxide, magnesia, silicon nitride and boron nitride are nanometer powder, are easily reunited in high polymer material, it is not easy to point
Dissipate and form thermal conducting path.
The content of the invention
In view of this, the purpose of the present invention is in view of the shortcomings of the prior art, there is provided a kind of insulating heat-conductive CABLE MATERIALS, this is exhausted
Edge CABLE MATERIALS thermal conductivity is high, good insulation preformance, and tensile strength is high, and toughness is strong, is easy to process.
The invention also discloses the preparation method of insulating heat-conductive CABLE MATERIALS.
To reach above-mentioned purpose, the present invention uses following technical scheme：
A kind of insulating heat-conductive CABLE MATERIALS, include the raw material of following parts by weight：High density polyethylene (HDPE) 60-70 parts are modified poly-
Propylene 20-30 parts, heat filling 15-25 parts, polyolefin elastomer 6-10 parts, glass fibre 5-8 parts, compatilizer 3-5 parts are modified
Firebrake ZB 3-8 parts, ethylene-vinyl acetate copolymer 10-15 parts.
Preferably, the preparation method of the modified polypropene comprises the following steps：By GMA, mistake
BP and polypropylene are by weight 0.5-1:0.3-0.6：After 10 mixing, the frit reaction 6- at 170-180 DEG C
After 10min, 80-100 mesh is crushed to.
Preferably, the preparation method of the heat filling comprises the following steps：By silicon nitride crystal whisker and magnesia by weight
Compare 2-3:After 1 is well mixed, add in the ethanol solution for the silane coupler that mass fraction is 2-5%, it is ultrasonic at 60-70 DEG C
Scattered 1.5-2.5h, is dried after being filtered to remove filtrate.
Preferably, a diameter of 0.1-0.6 μm of the silicon nitride crystal whisker, whisker length are 5-20 μm, the magnesia
Particle diameter is 60-80nm.
Preferably, the silane coupler be gamma-aminopropyl-triethoxy-silane or γ-（2,3- glycidoxies）Propyl group
Trimethoxy silane.
Preferably, the compatilizer is maleic anhydride inoculated polypropylene or maleic anhydride grafted polyethylene.
Preferably, the preparation method of the boric acid modification zinc comprises the following steps：Firebrake ZB is dissolved in 3-4 times of weight
In 75% ethanol solution, after disperseing 10-20min, odium stearate is then added, the weight ratio of the odium stearate and Firebrake ZB is
0.5-1:1,40-60min is stirred at 60-70 DEG C, is filtered to remove filtrate, dries, is crushed to 80-100 mesh.
Preferably, the filament diameter of the glass fibre is 8-12 μm.
A kind of preparation method of insulating heat-conductive CABLE MATERIALS, comprises the following steps：
（1）After raw material drying, it is well mixed；
（2）Above-mentioned well mixed raw material is granulated by extruder mixing extrusion, the temperature of the extruder is set as
160-210℃。
The beneficial effects of the invention are as follows：
1st, insulating heat-conductive CABLE MATERIALS of the present invention uses high density polyethylene (HDPE) as matrix, and high density polyethylene (HDPE) has well resistance to
Hot and cold resistance, chemical stability is good, and mechanical strength is good, and dielectric properties, environmental stress crack resistance is also preferable, but processes
Poor-performing, and after high density polyethylene (HDPE) adds inorganic material, the mechanical performance of high density polyethylene (HDPE) in itself can be caused and added
Work performance further declines, therefore with the addition of polypropylene, to improve the processing characteristics of high density polyethylene (HDPE), gathers for increase high density
Ethene and polyacrylic compatibility, the present invention is modified to polypropylene, with glycidyl methacrylate graft poly- third
Alkene, containing the epoxy group that carbon-carbon double bond and activity are very strong in GMA molecule, methacrylic acid is contracted
Water glyceride is grafted on polypropylene, can increase polypropylene and high density polyethylene (HDPE) and the compatibility of other compositions, and then
The overall performance of matrix is provided.
2nd, to improve the heat conductivility of insulating heat-conductive CABLE MATERIALS, the present invention increases heat filling, heat filling in the base
For silicon nitride crystal whisker and magnesia, wherein magnesia particle diameter is 60-80nm, and the thermal conductivity of nanoscale magnesium is because of atomic distance
Greatly increase with structure change；And a diameter of 0.1-0.6 μm of silicon nitride crystal whisker, whisker length are 5-20 μm, due to oxygen
It is different to change magnesium and silicon nitride crystal whisker particle diameter, when silicon nitride crystal whisker and magnesia are by weight 2-3:1 when being distributed in the base, can make
Comparatively dense accumulation is formed between magnesia and silicon nitride crystal whisker, the probability that contacts with each other increase, can be achieved compared with high filler loading capacity, in matrix
Portion forms heat conduction network chain, so as to greatly improve the thermal conductivity of material.
3rd, in order to improve the compatibility between conductive filler and matrix, the present invention is using silane coupler to conductive filler
It is modified, so as to improve the interfacial tension between conductive filler and matrix, reduces interface resistance, increase conductive filler is in matrix
In dispersive property, so as to effectively improve insulating heat-conductive CABLE MATERIALS thermal conductivity and processing characteristics.
4th, Firebrake ZB is added in the base, and so as to increase the fire resistance of insulating heat-conductive CABLE MATERIALS, the present invention is also using hard
Resin acid sodium carries out surface modification to Firebrake ZB, and so as to increase the interface binding power of Firebrake ZB and matrix, enhancing Firebrake ZB is in material
In dispersive property.
5th, polyolefin elastomer has excellent toughness and good processing characteristics, with polypropylene and high density polyethylene (HDPE)
Compatibility and good dispersion, disperse polyolefin elastomer in the base as stress concentration point, when system is impacted, lure
Crazing is sent out, crazing absorbs a large amount of impact energys around at it in evolution；Stress field between crazing and shear band simultaneously
Interfere, hinder it to be further developed into for crackle, so as to substantially increase the impact property of system, reach the mesh of toughness reinforcing
's.And the effect of glass fibre is when matrix is by external load or energy, is loaded along glass fibre to surrounding transmission,
Stress is promptly spread, so as to prevent the growth of crackle, the toughness and impact resistance of final RPP；Polyene
Olefin elastomer and glass fibre reinforcing material toughness and impact resistance in terms of different, have the function that Synergistic.
6th, the content of vinyl acetate is 20% in the ethylene-vinyl acetate copolymer added in the present invention, to being held for filler
Property is preferable, and processing characteristics is good, can improve the processing characteristics of matrix, also added compatilizer in addition to improve inorganic material
Interface between matrix, so as to improve insulating heat-conductive CABLE MATERIALS mechanical performance.
Embodiment
With reference to specific embodiment, the invention will be further described.
Embodiment 1
A kind of insulating heat-conductive CABLE MATERIALS, include the raw material of following parts by weight：60 parts of high density polyethylene (HDPE), modified polypropene
22 parts, 25 parts of heat filling, 6 parts of polyolefin elastomer, 5 parts of glass fibre, 3 parts of compatilizer maleic anhydride inoculated polypropylene, change
3 parts of Firebrake ZB of property, 15 parts of ethylene-vinyl acetate copolymer.
The preparation method of wherein modified polypropene comprises the following steps：By GMA, benzoyl peroxide
Formyl and polypropylene are by weight 0.5：0.3：After 10 mixing, at 170 DEG C after frit reaction 10min, 80 mesh are crushed to.
The preparation method of wherein heat filling comprises the following steps：By silicon nitride crystal whisker and magnesia by weight 2：1 is mixed
After closing uniformly, add in the ethanol solution that mass fraction is 2% silane coupler gamma-aminopropyl-triethoxy-silane, at 60 DEG C
Ultrasonic disperse 2.5h, dried after being filtered to remove filtrate；Wherein a diameter of 0.1-0.6 μm of silicon nitride crystal whisker, whisker length 5-
20 μm, the particle diameter of magnesia is 60-80nm.
The preparation method of boric acid modification zinc comprises the following steps：Firebrake ZB is dissolved in 75% ethanol solution of 3 times of weight,
After high speed dispersor high speed disperses 20min, odium stearate is then added, the weight ratio of wherein odium stearate and Firebrake ZB is
0.5:1,60min is stirred at 60 DEG C, is filtered to remove filtrate, after drying, is crushed to 80 mesh.
Wherein the filament diameter of glass fibre is 8-12 μm.
The preparation method of insulating heat-conductive CABLE MATERIALS, comprises the following steps：
（1）After raw material is dried at 80 DEG C, it is well mixed using high-speed mixer；
（2）Above-mentioned well mixed raw material is granulated by double screw extruder mixing extrusion, the temperature setting of extruder
For 160-210 DEG C, screw speed 90rpm.Wherein each area's temperature of extruder is respectively：I 160 DEG C of area, II 170 DEG C of area, IIIth area
180 DEG C, IV 190 DEG C of area, V 200 DEG C of area, VI 205 DEG C of area, VII 210 DEG C of area, VIII 205 DEG C of area, 200 DEG C of head.
Embodiment 2
A kind of insulating heat-conductive CABLE MATERIALS, include the raw material of following parts by weight：62 parts of high density polyethylene (HDPE), modified polypropene
20 parts, 22 parts of heat filling, 7 parts of polyolefin elastomer, 6 parts of glass fibre, 4 parts of compatilizer maleic anhydride grafted polyethylene, change
4 parts of Firebrake ZB of property, 14 parts of ethylene-vinyl acetate copolymer.
The preparation method of wherein modified polypropene comprises the following steps：By GMA, benzoyl peroxide
Formyl and polypropylene are by weight 0.5：0.6：After 10 mixing, at 180 DEG C after frit reaction 6min, 100 mesh are crushed to.
The preparation method of wherein heat filling comprises the following steps：By silicon nitride crystal whisker and magnesia by weight 3：1 is mixed
Close uniformly after, additions mass fraction for 5% silane coupler γ-（2,3- glycidoxies）The ethanol of propyl trimethoxy silicane
In solution, the ultrasonic disperse 1.5h at 70 DEG C, dried after being filtered to remove filtrate；Wherein a diameter of 0.1-0.6 μ of silicon nitride crystal whisker
M, whisker length are 5-20 μm, and the particle diameter of magnesia is 60-80nm.
The preparation method of boric acid modification zinc comprises the following steps：Firebrake ZB is dissolved in 75% ethanol solution of 4 times of weight,
After high speed dispersor high speed disperses 10min, odium stearate is then added, the weight ratio of wherein odium stearate and Firebrake ZB is
1:1,40min is stirred at 70 DEG C, is filtered to remove filtrate, after drying, is crushed to 100 mesh.
Wherein the filament diameter of glass fibre is 8-12 μm.
The preparation method of insulating heat-conductive CABLE MATERIALS, comprises the following steps：
（1）After raw material is dried at 80 DEG C, it is well mixed using high-speed mixer；
（2）Above-mentioned well mixed raw material is granulated by double screw extruder mixing extrusion, the temperature setting of extruder
For 160-210 DEG C, screw speed 90rpm.Wherein each area's temperature of extruder is respectively：I 160 DEG C of area, II 170 DEG C of area, IIIth area
180 DEG C, IV 190 DEG C of area, V 200 DEG C of area, VI 205 DEG C of area, VII 210 DEG C of area, VIII 205 DEG C of area, 200 DEG C of head.
Embodiment 3
A kind of insulating heat-conductive CABLE MATERIALS, include the raw material of following parts by weight：65 parts of high density polyethylene (HDPE), modified polypropene
25 parts, 20 parts of heat filling, 8 parts of polyolefin elastomer, 7 parts of glass fibre, 5 parts of compatilizer maleic anhydride inoculated polypropylene, change
6 parts of Firebrake ZB of property, 13 parts of ethylene-vinyl acetate copolymer.
The preparation method of wherein modified polypropene comprises the following steps：By GMA, benzoyl peroxide
Formyl and polypropylene are by weight 1：0.3：After 10 mixing, at 175 DEG C after frit reaction 10min, 90 mesh are crushed to.
The preparation method of wherein heat filling comprises the following steps：By silicon nitride crystal whisker and magnesia by weight 2.5：1
After well mixed, add in the ethanol solution that mass fraction is 3% silane coupler gamma-aminopropyl-triethoxy-silane, at 65 DEG C
Lower ultrasonic disperse 6h, is dried after being filtered to remove filtrate；Wherein a diameter of 0.1-0.6 μm of silicon nitride crystal whisker, whisker length 5-
20 μm, the particle diameter of magnesia is 60-80nm.
The preparation method of boric acid modification zinc comprises the following steps：Firebrake ZB is dissolved in 75% ethanol solution of 3.5 times of weight
In, after high speed dispersor high speed disperses 15min, then add the weight of odium stearate, wherein odium stearate and Firebrake ZB
Than for 0.8:1,50min is stirred at 65 DEG C, is filtered to remove filtrate, dries, is crushed to 90 mesh.
Wherein the filament diameter of glass fibre is 8-12 μm.
The preparation method of insulating heat-conductive CABLE MATERIALS, comprises the following steps：
（1）After raw material is dried at 80 DEG C, it is well mixed using high-speed mixer；
（2）Above-mentioned well mixed raw material is granulated by double screw extruder mixing extrusion, the temperature setting of extruder
For 160-210 DEG C, screw speed 90rpm.Wherein each area's temperature of extruder is respectively：I 160 DEG C of area, II 170 DEG C of area, IIIth area
180 DEG C, IV 190 DEG C of area, V 200 DEG C of area, VI 205 DEG C of area, VII 210 DEG C of area, VIII 205 DEG C of area, 200 DEG C of head.
Embodiment 4
The present embodiment is substantially the same manner as Example 3, and difference is：A kind of insulating heat-conductive CABLE MATERIALS, including it is following heavy
Measure the raw material of number：68 parts of high density polyethylene (HDPE), 28 parts of modified polypropene, 18 parts of heat filling, 9 parts of polyolefin elastomer, glass
8 parts of glass fiber, 3 parts of compatilizer maleic anhydride inoculated polypropylene, 5 parts of boric acid modification zinc, ethylene-vinyl acetate copolymer 12
Part.
Embodiment 5
The present embodiment is substantially the same manner as Example 3, and difference is：A kind of insulating heat-conductive CABLE MATERIALS, including it is following heavy
Measure the raw material of number：66 parts of high density polyethylene (HDPE), 30 parts of modified polypropene, 16 parts of heat filling, 10 parts of polyolefin elastomer, glass
6 parts of glass fiber, 4 parts of compatilizer maleic anhydride inoculated polypropylene, 7 parts of boric acid modification zinc, ethylene-vinyl acetate copolymer 11
Part.
Embodiment 6
The present embodiment is substantially the same manner as Example 3, and difference is：A kind of insulating heat-conductive CABLE MATERIALS, including it is following heavy
Measure the raw material of number：70 parts of high density polyethylene (HDPE), 26 parts of modified polypropene, 15 parts of heat filling, 9 parts of polyolefin elastomer, glass
7 parts of glass fiber, 5 parts of compatilizer maleic anhydride inoculated polypropylene, 8 parts of boric acid modification zinc, ethylene-vinyl acetate copolymer 10
Part.
Embodiment 7
The present embodiment is substantially the same manner as Example 3, and difference is in being that the glass fibre in embodiment 3 changes
Property, i.e., it is using the glass fibre in being formulated in modified glass-fiber alternative embodiment 3, specific method of modifying：By glass fibre
It is distributed in the aqueous slkali that pH is 9.0 and stirs 30min, the ethoxy of γ-aminopropyl three that mass fraction is 6% is placed in after washing and drying
In base silane solution, ultrasonic disperse 30min, centrifugation is dried after removing supernatant, that is, modified glass-fiber is prepared.
Glass fibre is modified using gamma-aminopropyl-triethoxy-silane, can be with reinforcing glass fiber and matrix
Adhesion, so as to strengthen the mechanical performance of insulating heat-conductive CABLE MATERIALS of the present invention.
Comparative example 1
Comparative example 1 is substantially the same manner as Example 3, and difference is：Modified polypropene is replaced by high density polyethylene (HDPE), repaiied
Formula after changing is：A kind of insulating heat-conductive CABLE MATERIALS, include the raw material of following parts by weight：90 parts of high density polyethylene (HDPE), heat conduction
20 parts of filler, 8 parts of polyolefin elastomer, 7 parts of glass fibre, 5 parts of compatilizer maleic anhydride inoculated polypropylene, boric acid modification zinc 6
Part, 13 parts of ethylene-vinyl acetate copolymer.
Comparative example 2
Comparative example 2 is substantially the same manner as Example 3, and difference is that polypropylene without modification, makes directly as raw material
With.
Comparative example 3
Comparative example 3 is substantially the same manner as Example 3, and difference is：Silicon nitride crystal whisker is only included in conductive filler, wherein
The preparation method of heat filling comprises the following steps：It is 3% silane coupler γ-ammonia third by silicon nitride crystal whisker addition mass fraction
In the ethanol solution of ethyl triethoxy silicane alkane, the ultrasonic disperse 6h at 65 DEG C, dried after being filtered to remove filtrate；Wherein nitrogenize silicon wafer
A diameter of 0.1-0.6 μm of palpus, whisker length are 5-20 μm.
Comparative example 4
The difference of comparative example 4 and embodiment 3 is：Magnesia, the preparation of heat filling are only included in conductive filler
Method comprises the following steps：Magnesia is added into the second that mass fraction is 3% silane coupler gamma-aminopropyl-triethoxy-silane
In alcoholic solution, the ultrasonic disperse 6h at 65 DEG C, dried after being filtered to remove filtrate；Wherein the particle diameter of magnesia is 60-80nm.
Comparative example 5
The weight of silicon nitride crystal whisker in conductive filler and magnesia ratio is adjusted to 1 by comparative example 5:1, other are formulated and prepared
Technique is same as Example 3.
Comparative example 6
The weight of silicon nitride crystal whisker in conductive filler and magnesia ratio is adjusted to 4 by comparative example 6:1, other are formulated and prepared
Technique is same as Example 3.
Comparative example 7
The difference of comparative example 7 and embodiment 3 is：Conductive filler is without modification：I.e. by silicon nitride crystal whisker and oxygen
Change magnesium by weight 2.5：After 1 is well mixed, used directly as the raw material for preparing CABLE MATERIALS.
Comparative example 8
The difference of comparative example 8 and embodiment 3 is：Boric acid modification zinc is replaced with Firebrake ZB in formula, i.e.,：It is a kind of exhausted
Edge heat conduction CABLE MATERIALS, include the raw material of following parts by weight：High density polyethylene (HDPE) 60-70 parts, modified polypropene 20-30 parts, lead
Hot filler 15-25 parts, polyolefin elastomer 6-10 parts, glass fibre 5-8 parts, compatilizer 3-5 parts, Firebrake ZB 3-8 parts, ethene-
Vinyl acetate co-polymer 10-15 parts.
Test and analysis
CABLE MATERIALS prepared by embodiment 1-7 and comparative example 1-8 is molded into required standard testing using injection machine
Batten, wherein injection temperature are 210-220 DEG C, rotating speed 80rpm, and mold temperature is 80 DEG C.Tensile property is with reference to GB/T 1040
Test, draw speed 50mm/min；Thermal conductivity test is with reference to ASTM-D5470 standards, using the type Determination of conductive coefficients of DRL- III
Instrument；Specific insulation is with reference to GB/T1410-2006 solid insulating materials specific insulation and surface resistivity test method；Property
Energy test result is shown in Table 1.
The performance test results of the CABLE MATERIALS of table 1
As can be seen from Table 1, the tensile strength of the insulating heat-conductive CABLE MATERIALS prepared in 1-6 of the embodiment of the present invention can reach
30.6-38.5MPa, elongation at break 170.1%-200.5%, thermal conductivity 4.0-5.4W/（m·K）, specific insulation is
4.8×1014- 6.7×1014Ω * cm, good heat conduction effect, mechanical performance is high, excellent insulation performance.And to glass in embodiment 7
Fiber is modified, and the tensile strength and elongation at break of CABLE MATERIALS have been lifted.And comparative example 1 is compared with Example 3
Modified polypropene is replaced by high density polyethylene (HDPE), polypropylene is not modified comparative example 2 compared with Example 3, the electricity of preparation
The tensile strength and elongation at break of cable material have all declined, and illustrate to add modified polypropene in the base, can improve matrix
Mechanical performance.Comparative example 3 only includes silicon nitride crystal whisker in conductive filler compared with Example 3, and comparative example 4 and embodiment 3
Compared to only including magnesia in conductive filler, and comparative example 3 and comparative example 4 are compared with Example 3, and thermal conductivity declines a lot, says
Bright silicon nitride crystal whisker has the function that to cooperate with magnesia improves matrix thermal conductivity；In comparative example 5 and comparative example 6 with embodiment 3
Difference be to adjust the proportioning of silicon nitride crystal whisker and magnesia, and prepare CABLE MATERIALS thermal conductivity than embodiment 3
It is small, illustrate the formula of heat filling in the embodiment of the present invention 3 most preferably, silicon nitride crystal whisker forms in the base with magnesia
Heat conduction network chain, so as to greatly improve the thermal conductivity of material.And the difference of comparative example 7 and embodiment 3 is not using silane coupled
Agent is handled, and the difference of comparative example 8 and embodiment 3 is Firebrake ZB is not also surface-treated, and as a result causes comparative example 7
The tensile strength and thermal conductivity of the CABLE MATERIALS prepared with comparative example 8 have the reduction in very big Chengdu, illustrate matrix and the nothing of addition
The interface binding power of machine filler has a great impact to the mechanical strength and additive of CABLE MATERIALS in the base scattered, and then
Influence the thermal conductivity of matrix, in the present invention surface treatment to Firebrake ZB and silicon nitride crystal whisker and magnesia substantially increase electricity
The mechanical performance and thermal conductivity of cable material.
Finally illustrate, the above embodiments are merely illustrative of the technical solutions of the present invention and it is unrestricted, this area is common
Other modifications or equivalent substitution that technical staff is made to technical scheme, without departing from technical solution of the present invention
Spirit and scope, all should cover among scope of the presently claimed invention.
Claims (7)
- A kind of 1. insulating heat-conductive CABLE MATERIALS, it is characterised in that：Include the raw material of following parts by weight：High density polyethylene (HDPE) 60-70 Part, modified polypropene 20-30 parts, heat filling 15-25 parts, polyolefin elastomer 6-10 parts, glass fibre 5-8 parts, compatilizer 3-5 parts, boric acid modification zinc 3-8 parts, ethylene-vinyl acetate copolymer 10-15 parts；The preparation method of the modified polypropene comprises the following steps：By GMA, benzoyl peroxide And polypropylene is by weight 0.5-1:0.3-0.6：After 10 mixing, at 170-180 DEG C after frit reaction 6-10min, crush To 80-100 mesh；The preparation method of the boric acid modification zinc comprises the following steps：Firebrake ZB is dissolved in 75% ethanol solution of 3-4 times of weight In, after disperseing 10-20min, then add odium stearate, the weight ratio of the odium stearate and Firebrake ZB is 0.5-1:1, 40-60min is stirred at 60-70 DEG C, is filtered to remove filtrate, dries, is crushed to 80-100 mesh.
- A kind of 2. insulating heat-conductive CABLE MATERIALS according to claim 1, it is characterised in that：The preparation method of the heat filling Comprise the following steps：By silicon nitride crystal whisker and magnesia by weight 2-3:After 1 is well mixed, it is 2-5%'s to add mass fraction In the ethanol solution of silane coupler, the ultrasonic disperse 1.5-2.5h at 60-70 DEG C, dried after being filtered to remove filtrate.
- A kind of 3. insulating heat-conductive CABLE MATERIALS according to claim 2, it is characterised in that：The silicon nitride crystal whisker it is a diameter of 0.1-0.6 μm, whisker length is 5-20 μm, and the particle diameter of the magnesia is 60-80nm.
- A kind of 4. insulating heat-conductive CABLE MATERIALS according to claim 2, it is characterised in that：The silane coupler is γ-ammonia Propyl-triethoxysilicane or γ-（2,3- glycidoxies）Propyl trimethoxy silicane.
- A kind of 5. insulating heat-conductive CABLE MATERIALS according to claim 1, it is characterised in that：The compatilizer connects for maleic anhydride Branch polypropylene or maleic anhydride grafted polyethylene.
- A kind of 6. insulating heat-conductive CABLE MATERIALS according to claim 1, it is characterised in that：The filament diameter of the glass fibre For 8-12 μm.
- 7. the preparation method of the insulating heat-conductive CABLE MATERIALS as described in claim any one of 1-6, it is characterised in that：Including following step Suddenly：（1）After raw material drying, it is well mixed；（2）Above-mentioned well mixed raw material is granulated by extruder mixing extrusion, the temperature of the extruder is set as 160- 210℃。
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| CN106366440A (en) * | 2016-08-29 | 2017-02-01 | 胡军 | Electric insulation material |
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| CN108727670A (en) * | 2018-06-14 | 2018-11-02 | 合肥市大卓电力有限责任公司 | A kind of insulating heat-conductive CABLE MATERIALS and preparation method thereof |
| CN111471232A (en) * | 2020-04-27 | 2020-07-31 | 芜湖博康新能源汽车技术有限公司 | Cable material for high-voltage wire harness of driving motor and preparation method thereof |
| CN112751306B (en) * | 2020-12-24 | 2023-02-28 | 安徽蓝通科技股份有限公司 | Heat-resistant and impact-resistant MPP power tube |
| CN112624723B (en) * | 2021-01-13 | 2022-02-08 | 杭州申华混凝土有限公司 | Freeze-thaw resistant concrete and preparation method thereof |
| CN118098678B (en) * | 2024-03-27 | 2024-09-27 | 珠峰线缆有限公司 | Medium-voltage aluminum alloy overhead insulated cable |
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