CN104693791A - Flame retardant high-temperature resistant thermal conductive composite material and preparation method thereof - Google Patents
Flame retardant high-temperature resistant thermal conductive composite material and preparation method thereof Download PDFInfo
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- CN104693791A CN104693791A CN201310646961.5A CN201310646961A CN104693791A CN 104693791 A CN104693791 A CN 104693791A CN 201310646961 A CN201310646961 A CN 201310646961A CN 104693791 A CN104693791 A CN 104693791A
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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
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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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
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- 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
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- 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
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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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a flame retardant high-temperature resistant thermal conductive composite material comprising the following components by weight: 100 parts of matrix resin, 35-60 parts of a thermal conductive agent, 15-30 parts of a thermal conductive synergistic agent, 0.5-1.0 part of a coupling agent, 1.5-2.5 parts of a heat stabilizer, 15-25 parts of a flame retardant, 1.5-2.0 parts of an antioxidant and 3-5 parts of a processing aid. The preparation method is as follows: mixing the 100 parts of matrix resin and 0.5-1.0 part of the coupling agent in a high mixing machine for 2-4 minutes, then adding 35-60 parts of the thermal conductive agent, 1.5-2.5 parts of the heat stabilizer, 15-25 parts of the flame retardant, 1.5-2.0 parts of the antioxidant and 3-5 parts of the processing aid into the high mixing machine for mixing for 3-5 minutes; after mixing, adding the mixture into a twin screw extruder, adding 15-30 parts of the thermal conductive synergistic agent into the twin screw extruder for extrusion, then cooling with water, granulating, drying and molding to obtain the flame retardant high-temperature resistant thermal conductive composite material. The flame retardant high-temperature resistant thermal conductive composite material has good thermal conductivity, flame retardant property, mechanical properties and high thermal deformation temperature.
Description
Technical field
The present invention relates to macromolecule engineering technical field of material modification and processing technique field, particularly a kind of flame-resistant high-temperature-resistant heat-conductive composite material and preparation method thereof.
Background technology
Along with the development of industrial production and science and technology, in fields such as heat exchange engineering, electromagnetic shielding, electric, flame-retardant heat conduction materials, the high-efficiency heat conduction macromolecular material of good combination property more and more receives publicity.In recent years, adopt matrix plastic to be the general-purpose plastics such as polypropylene, polyvinyl chloride, heat conductive filler is metal powder, steel fiber etc. mainly, though heat conductivility improves, but heat conductive filler addition is very large, very large on the insulating property impact of goods, mechanical property also obviously declines.
Due to electronics, electric product more and more densification, in use heat not easily distributes, and too high heat accumulation affects the work-ing life of device, therefore has higher requirement to the high thermal resistance of material.Higher use temperature and Application Areas, also improve the requirement to flame retardant properties and mechanical property.But one can not take into account thermal conductivity, high thermal resistance, flame retardant resistance and the good material of mechanical property over-all properties at present, therefore also needs constantly to carry out modification to improve over-all properties to material.
Summary of the invention
In order to overcome the defect of prior art, the first object of the present invention is to provide a kind of matrix material with excellent thermal conductivity, flame retardant resistance, mechanical property and higher heat-drawn wire.
Another object of the present invention is to provide a kind of preparation method of above-mentioned flame-resistant high-temperature-resistant heat-conductive composite material.
To achieve these goals, technical scheme of the present invention is as follows:
The invention provides a kind of flame-resistant high-temperature-resistant heat-conductive composite material, be made up of the component comprising following weight part:
Described matrix resin comprises the nylon66 fiber and polybutylene terephthalate that mass ratio is 3:1 ~ 3:2.
Described thermal conducting agent be selected from silicon carbide, aluminium nitride, molybdenum disilicide or titanium dioxide one or more; Described thermal conducting agent particle diameter is 5 ~ 15um.
Described heat conduction synergist be selected from salt of wormwood whisker, graphite or glass one or more.
Described coupling agent be selected from vinyl trichloro silane, vinyltrimethoxy silane or γ-aminopropyl triethoxysilane one or more.
Described thermo-stabilizer is selected from triphenylphosphate or phosphorous acid triphenylmethyl methacrylate in the ninth of the ten Heavenly Stems.
Described fire retardant be selected from melamine cyanurate, melamine phosphate, trimeric cyanamide octamolybdate or melamine borate salt one or more.
Described oxidation inhibitor is selected from N, N '-two (betanaphthyl) Ursol D, [β-(3,5 di-t-butyl 4-hydroxy-pheny) propionic acid] pentaerythritol ester, Tyox B or 1, one or more in 1,3-tri-(2-methyl-4-hydroxyl-5-trimethylphenylmethane base) butane.
Described processing aid be selected from paraffin, Zinic stearas or calcium stearate one or more.
Present invention also offers a kind of preparation method of above-mentioned flame-resistant high-temperature-resistant heat-conductive composite material, comprise the following steps:
By 100 parts of matrix resins and 0.5 ~ 1.0 part of coupling agent high-speed mixer and mixing 2 ~ 4 minutes, then 35 ~ 60 parts of thermal conducting agents, 1.5 ~ 2.5 parts of thermo-stabilizers, 15 ~ 25 parts of fire retardants, 1.5 ~ 2.0 parts of oxidation inhibitor are joined high mixer with 3 ~ 5 parts of processing aids and mix 3 ~ 5 minutes; Join twin screw extruder by main charging opening after mixing, then joined in twin screw extruder by 15 ~ 30 parts of heat conduction synergists and extrude, through water-cooled, pelletizing, dry, injection moulding obtains flame-resistant high-temperature-resistant heat-conductive composite material.
The screw slenderness ratio of described twin screw extruder is 30:1, and screw speed is 150 ~ 180r/min.
The mixing temperature of described high mixer is 80 ~ 100 DEG C.
In described twin screw extruder, extrusion temperature is 270 ~ 300 DEG C.
The temperature of described drying is 120 DEG C, and the time is 3 ~ 4h.
Compared with prior art, the present invention has following beneficial effect and advantage:
1, flame-resistant high-temperature-resistant heat-conductive composite material of the present invention adopts nylon66 fiber and polybutylene terephthalate as matrix resin, and wherein nylon66 fiber has that mechanical property is high, heat-resisting and flame retardant properties is good, but its water-intake rate is bigger than normal; Polybutylene terephthalate has that electrical insulating property is good, water-intake rate is extremely low, processing fluidity good, product surface gloss, but its mechanical property is slightly poor, thermotolerance and flame retardant resistance also on the low side in nylon, therefore the combination matrix both adopting not only makes material have excellent flame retardant properties, thermotolerance and mechanical property, give insulation heat-conducting property and the processing characteristics of material excellence simultaneously.
2, the introducing of thermal conducting agent and heat conduction synergist in the present invention, not only gives material better heat conductive insulating performance, and the tensile strength of material, flexural strength and impelling strength are all relative improves; Effective cooperation of thermo-stabilizer and fire retardant, makes the thermotolerance of material and flame retardant resistance also improve greatly, thus makes material can be widely used as high temperature resistant, heat conduction, the field that fire-retardant and requirement of mechanical strength is higher; Further, of the present invention preparation is simple, is applicable to suitability for industrialized production; Electronic apparatus, military project, space flight and aviation, electronic communication etc. can be widely used in and need flame-resistant high-temperature-resistant thermally conductive material field.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
GB(GB is adopted in following examples) measure the properties of material, if no special instructions, the number of component is parts by weight.
Embodiment 1
(1) get the raw materials ready: be made up of the raw material of following parts by weight, matrix resin 100 parts (nylon66 fiber 70 parts and polybutylene terephthalate 30 parts), 48 parts, silicon carbide, 15 parts, graphite, vinyl trichloro silane 1.0 parts, triphenylphosphate 2.0 parts, melamine phosphate 18 parts, [β-(3,5 di-t-butyl 4-hydroxy-pheny) propionic acid] pentaerythritol ester 2.0 parts, Zinic stearas 3.0 parts;
(2) by matrix resin and coupling agent high-speed mixer and mixing 3 minutes, then thermal conducting agent, thermo-stabilizer, fire retardant, oxidation inhibitor are joined high mixer with processing aid and mixes 4 minutes, wherein the mixing temperature of high mixer is at 80 ~ 85 DEG C; Join twin screw extruder by main charging opening after mixing, then heat conduction synergist is joined twin screw extruder, extrusion temperature is 270 ~ 280 DEG C, and screw slenderness ratio is 30:1, and screw speed is 150r/min.
(3) material is after extruding, through water-cooled, pelletizing, then by pellet in loft drier, 120 DEG C of dryings 3.5 hours, then be injection molded into sample; Its properties is in table 1.
Embodiment 2
(1) get the raw materials ready: be made up of the raw material of following parts by weight, matrix resin 100 parts (nylon66 fiber 60 parts and polybutylene terephthalate 40 parts), aluminium nitride 35 parts, salt of wormwood whisker 20 parts, vinyltrimethoxy silane 0.5 part, triphenylphosphate 1.5 parts, melamine cyanurate 15 parts, N, N '-two (betanaphthyl) Ursol D 1.8 parts, calcium stearate 3.5 parts;
(2) by matrix resin and coupling agent high-speed mixer and mixing 2 minutes, then thermal conducting agent, thermo-stabilizer, fire retardant, oxidation inhibitor are joined high mixer with processing aid and mixes 5 minutes, wherein the mixing temperature of high mixer is at 95 ~ 100 DEG C; Join twin screw extruder by main charging opening after mixing, then heat conduction synergist is joined twin screw extruder, extrusion temperature is 290 ~ 300 DEG C, and screw slenderness ratio is 30:1, and screw speed is 180r/min.
(3) material is after extruding, through water-cooled, pelletizing, then by pellet in loft drier, 120 DEG C of dryings 3 hours, then be injection molded into sample.Its properties is in table 1.
Embodiment 3
(1) get the raw materials ready: be made up of the raw material of following parts by weight, matrix resin 100 parts (nylon66 fiber 75 parts and polybutylene terephthalate 25 parts), molybdenum disilicide 60 parts, salt of wormwood whisker 25 parts, vinyl trichloro silane 1.0 parts, phosphorous acid triphenylmethyl methacrylate in the ninth of the ten Heavenly Stems 2.0 parts, trimeric cyanamide octamolybdate 25 parts, [β-(3,5 di-t-butyl 4-hydroxy-pheny) propionic acid] pentaerythritol ester 1.8 parts, Zinic stearas 4.0 parts;
(2) by matrix resin and coupling agent high-speed mixer and mixing 4 minutes, then thermal conducting agent, thermo-stabilizer, fire retardant, oxidation inhibitor are joined high mixer with processing aid and mixes 3 minutes, wherein the mixing temperature of high mixer is at 85 ~ 90 DEG C; Join twin screw extruder by main charging opening after mixing, then heat conduction synergist is joined twin screw extruder, extrusion temperature is 280 ~ 290 DEG C, and screw slenderness ratio is 30:1, and screw speed is 165r/min.
(3) material is after extruding, through water-cooled, pelletizing, then by pellet in loft drier, 120 DEG C of dryings 4 hours, then be injection molded into sample.Its properties is in table 1.
Embodiment 4
(1) get the raw materials ready: be made up of the raw material of following parts by weight, matrix resin 100 parts (nylon66 fiber 65 parts and polybutylene terephthalate 35 parts), molybdenum disilicide 50 parts, glass 30 parts, γ-aminopropyl triethoxysilane 0.5 part, triphenylphosphate 2.5 parts, melamine phosphate 20 parts, Tyox B 1.5 parts, calcium stearate 5.0 parts;
(2) by matrix resin and coupling agent high-speed mixer and mixing 3 minutes, then thermal conducting agent, thermo-stabilizer, fire retardant, oxidation inhibitor are joined high mixer with processing aid and mixes 4 minutes, wherein the mixing temperature of high mixer is at 85 ~ 90 DEG C; Join twin screw extruder by main charging opening after mixing, then heat conduction synergist is joined twin screw extruder, extrusion temperature is 280 ~ 290 DEG C, and screw slenderness ratio is 30:1, and screw speed is 170r/min.
(3) material is after extruding, through water-cooled, pelletizing, then by pellet in loft drier, 120 DEG C of dryings 3.5 hours, then be injection molded into sample.Its properties is in table 1.
Comparative example 1
This comparative example is with the difference part of embodiment 3, in the preparation of mixture, do not add thermal conducting agent.All the other components, temperature of reaction, time and step are all identical.The properties of the matrix material that this comparative example obtains is in table 1.
Comparative example 2
This comparative example is with the difference part of embodiment 4, in the preparation of mixture, do not add thermo-stabilizer and oxidation inhibitor.All the other components, temperature of reaction, time and step are all identical.The properties of the matrix material that this comparative example obtains is in table 1.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Comparative example 1 | Comparative example 2 | |
| Tensile strength (MPa) | 166 | 158 | 177 | 172 | 162 | 178 |
| Flexural strength (MPa) | 184 | 175 | 193 | 189 | 171 | 191 |
| Notched Izod impact strength (KJ/m 2） | 23 | 19 | 26 | 28 | 17 | 27 |
| Heat-drawn wire (DEG C) | 262 | 257 | 288 | 294 | 286 | 216 |
| Thermal conductivity (w/m.k) | 3.2 | 2.4 | 5.6 | 5.2 | 1.1 | 5.3 |
| Oxygen index (%) | 46 | 42 | 53 | 51 | 49 | 44 |
Can be found out by data every in table 1, embodiment 3 and embodiment 4 all keep thermal conductivity, flame retardant resistance, mechanical property and the higher heat-drawn wire that matrix material is good, and over-all properties reaches very large lifting.By the contrast of comparative example 1 and embodiment 3, find that its thermal conductivity of matrix material not adding thermal conducting agent declines to a great extent, and mechanical strength also decreases; By the contrast of comparative example 2 and embodiment 4, find that the heat-drawn wire of not adding thermo-stabilizer and oxidation inhibitor significantly decays, oxygen index also slightly declines.
Embodiment 5
(1) get the raw materials ready: be made up of the raw material of following parts by weight, matrix resin 100 parts (nylon66 fiber 70 parts and polybutylene terephthalate 30 parts), titanium dioxide 45 parts, glass 28 parts, γ-aminopropyl triethoxysilane 0.75 part, triphenylphosphate 1.8 parts, melamine borate salt 22 parts, 1,1,3-tri-(2-methyl-4-hydroxyl-5-trimethylphenylmethane base) butane 1.7 parts, 4.5 parts, paraffin;
(2) by matrix resin and coupling agent high-speed mixer and mixing 3 minutes, then thermal conducting agent, thermo-stabilizer, fire retardant, oxidation inhibitor are joined high mixer with processing aid and mixes 4 minutes, wherein the mixing temperature of high mixer is at 85 ~ 90 DEG C; Join twin screw extruder by main charging opening after mixing, then heat conduction synergist is joined twin screw extruder, extrusion temperature is 280 ~ 290 DEG C, and screw slenderness ratio is 30:1, and screw speed is 170r/min.
(3) material is after extruding, through water-cooled, pelletizing, then by pellet in loft drier, 120 DEG C of dryings 3.5 hours, then be injection molded into sample.
Above-mentioned is can understand and apply the invention for ease of those skilled in the art to the description of embodiment.Person skilled in the art obviously easily can make various amendment to these embodiments, and General Principle described herein is applied in other embodiments and need not through performing creative labour.Therefore, the invention is not restricted to embodiment here, those skilled in the art, according to announcement of the present invention, do not depart from improvement that scope makes and amendment all should within protection scope of the present invention.
Claims (10)
1. a flame-resistant high-temperature-resistant heat-conductive composite material, is characterized in that: be made up of the component comprising following weight part:
2. flame-resistant high-temperature-resistant heat-conductive composite material according to claim 1, is characterized in that: described matrix resin comprises the nylon66 fiber and polybutylene terephthalate that mass ratio is 3:1 ~ 3:2.
3. flame-resistant high-temperature-resistant heat-conductive composite material according to claim 1, is characterized in that: described thermal conducting agent be selected from silicon carbide, aluminium nitride, molybdenum disilicide or titanium dioxide one or more; Described thermal conducting agent particle diameter is 5 ~ 15um.
4. flame-resistant high-temperature-resistant heat-conductive composite material according to claim 1, is characterized in that: described heat conduction synergist be selected from salt of wormwood whisker, graphite or glass one or more.
5. flame-resistant high-temperature-resistant heat-conductive composite material according to claim 1, is characterized in that: described coupling agent be selected from vinyl trichloro silane, vinyltrimethoxy silane or γ-aminopropyl triethoxysilane one or more.
6. flame-resistant high-temperature-resistant heat-conductive composite material according to claim 1, is characterized in that: described thermo-stabilizer is selected from triphenylphosphate or phosphorous acid triphenylmethyl methacrylate in the ninth of the ten Heavenly Stems.
7. flame-resistant high-temperature-resistant heat-conductive composite material according to claim 1, is characterized in that: described fire retardant be selected from melamine cyanurate, melamine phosphate, trimeric cyanamide octamolybdate or melamine borate salt one or more.
8. flame-resistant high-temperature-resistant heat-conductive composite material according to claim 1, it is characterized in that: described oxidation inhibitor is selected from N, N '-two (betanaphthyl) Ursol D, [β-(3,5 di-t-butyl 4-hydroxy-pheny) propionic acid] pentaerythritol ester, Tyox B or 1, one or more in 1,3-tri-(2-methyl-4-hydroxyl-5-trimethylphenylmethane base) butane;
Or described processing aid is selected from one or more in paraffin, Zinic stearas or calcium stearate.
9. a preparation method for the arbitrary described flame-resistant high-temperature-resistant heat-conductive composite material of claim 1 to 8, is characterized in that: comprise the following steps:
By 100 parts of matrix resins and 0.5 ~ 1.0 part of coupling agent high-speed mixer and mixing 2 ~ 4 minutes, then 35 ~ 60 parts of thermal conducting agents, 1.5 ~ 2.5 parts of thermo-stabilizers, 15 ~ 25 parts of fire retardants, 1.5 ~ 2.0 parts of oxidation inhibitor are joined high mixer with 3 ~ 5 parts of processing aids and mix 3 ~ 5 minutes; Join twin screw extruder by main charging opening after mixing, then joined in twin screw extruder by 15 ~ 30 parts of heat conduction synergists and extrude, through water-cooled, pelletizing, dry, injection moulding obtains flame-resistant high-temperature-resistant heat-conductive composite material.
10. the preparation method of flame-resistant high-temperature-resistant heat-conductive composite material according to claim 9, is characterized in that: the screw slenderness ratio of described twin screw extruder is 30:1, and screw speed is 150 ~ 180r/min;
Or the mixing temperature of described high mixer is 80 ~ 100 DEG C;
Or extrusion temperature is 270 ~ 300 DEG C in described twin screw extruder;
Or the temperature of described drying is 120 DEG C, the time is 3 ~ 4h.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106566246A (en) * | 2016-11-16 | 2017-04-19 | 马鞍山市华能电力线路器材有限责任公司 | Flame-retardant nylon composite material with high rigidity and good flexibility for electric power fittings and preparation method thereof |
| CN106589928A (en) * | 2016-11-16 | 2017-04-26 | 马鞍山市华能电力线路器材有限责任公司 | Novel wearable flame-retardant nylon composite material for electric power fittings and manufacturing method thereof |
| CN110317581A (en) * | 2019-06-06 | 2019-10-11 | 东莞市盛元新材料科技有限公司 | A kind of pureed thermostable heat-conductive composite material and preparation method |
| CN112724661A (en) * | 2020-12-29 | 2021-04-30 | 河北亿正线缆有限公司 | High flame-retardant insulation type wire and cable |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106566246A (en) * | 2016-11-16 | 2017-04-19 | 马鞍山市华能电力线路器材有限责任公司 | Flame-retardant nylon composite material with high rigidity and good flexibility for electric power fittings and preparation method thereof |
| CN106589928A (en) * | 2016-11-16 | 2017-04-26 | 马鞍山市华能电力线路器材有限责任公司 | Novel wearable flame-retardant nylon composite material for electric power fittings and manufacturing method thereof |
| CN110317581A (en) * | 2019-06-06 | 2019-10-11 | 东莞市盛元新材料科技有限公司 | A kind of pureed thermostable heat-conductive composite material and preparation method |
| CN112724661A (en) * | 2020-12-29 | 2021-04-30 | 河北亿正线缆有限公司 | High flame-retardant insulation type wire and cable |
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Application publication date: 20150610 |