CN104087001B - Medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material and manufacturing process thereof - Google Patents
Medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material and manufacturing process thereof Download PDFInfo
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Abstract
The invention discloses a kind of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material and manufacturing process thereof, it is characterized in that consisting of by the raw material of mass parts: 35～45 parts of methyl ethylene organosilicon rubbers, 15～25 parts of white carbons, 1.5～3 parts of nano imvites, 10～25 parts, aluminium hydroxide, 10～18 parts of magnesium hydroxides, 0.4～0.8 part of crosslinking agent, 2～5.8 parts of constitution controllers, 2～4 parts of iron oxide reds, 0.80～1.5 part of coupling agent. Insulating materials of the present invention, not only can meet as medium pressure grade cable insulation material, cable accessory etc. the requirement to heat resistance, higher electrical insulation properties, also has higher mechanical strength, has opened up the new application of silastic material.
Description
Technical field
The invention belongs to silicon rubber insulation material technology field, be specifically related to a kind of high voltage, high low temperature, fire-retardant, environmental protection,Silicon rubber insulation material and the manufacturing process thereof in soft isoelectric line cable, applied.
Background technology
Silicon rubber has excellent electrical insulation properties and good physical and mechanical properties, resistance to atmospheric aging, resistance to smelly endowment, resistance toLight aging, fire-retardant, radiation hardness, oil resistant, be one of elastomeric material that serviceability temperature is the highest, as insulating materials, and can be extensiveInsulation and the sheath of the multiple cables such as, heating cables existing for cable for ship, aviation wire, motor leading and connecting.
Due to the excellent specific property that silastic material has, the demand of silicon rubber insulation electric wire is increasing, but current mainBe applied to low tension wire field of cables. Along with the development of all kinds of mechanized equipments and the raising of market demands, need resistance to more high voltage etc.The silicon rubber insulation material of level, improves power delivery ability. As rail locomotive vehicle traction flexible cable. Insulating materials proof voltageThe raising of grade, needs material to have to cause the factor of shelf depreciation to exist, and Material texture is even, without granule foreign, bubble,Free son etc. And the running environment of cable also needs material to have resistance to high/low temperature, higher mechanical performance, fire-retardant and environmental protection etc.Harsh requirement. But the mechanical performance of general category silicon rubber is other quality of rubber materials relatively, poor, does not meet specific conditionUnder requirement, improve silastic material under 6-35kV grade, move electric property and mechanical performance, become numerous silastic materialsOne of focus of application.
, there is contradiction in the requirement of above-mentioned performance indications, become the difficult point institute of the research and development of such material in the formula Design of material.
Summary of the invention
The present invention overcomes deficiency of the prior art, provides one to have high voltage withstanding, resistance to high/low temperature, fire-retardant, environmental protection, softnessMedium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material and manufacturing process thereof with the feature such as manufacturing process is simple.
For achieving the above object, technical scheme of the present invention is as follows;
The feature of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material of the present invention is to consist of by the raw material of mass parts:
35～45 parts of methyl ethylene organosilicon rubbers, 15～25 parts of white carbons, 1.5～3 parts of nano imvites, aluminium hydroxide10～25 parts, 10～18 parts of magnesium hydroxides, 0.4～0.8 part of crosslinking agent, 2～5.8 parts of constitution controllers, iron oxide red 2～0.80～1.5 part of 4 part, coupling agent.
The feature of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material of the present invention is also:
The molfraction that contents of ethylene in described methyl ethylene organosilicon rubber accounts for methyl ethylene monomer is 0.10～0.15%, monomer molecule weight average relative molecular weight is 46～600,000.
Described white carbon is that gas-phase process is manufactured gained.
Described crosslinking agent is 2,5-dimethyl-2,5 di-tert-butyl peroxide hexane DBPMH; Or be 2,4-dichloro benzoyl peroxideFormyl DCBP; Or be cumyl peroxide DCP.
Described constitution controller is any one in diphenyl silanediol and hydroxy silicon oil, or is both combination of arbitrary proportionThing.
Described coupling agent is silane coupler, alkoxyl titanate coupling agent, pyrophosphoric acid type titanium ester acid coupling agent, or is AluminateCoupling agent.
The feature of the manufacturing process of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material of the present invention is to carry out according to the following steps, stepIn the amount of taking of each raw material all by mass parts:
Step 1: get 10～18 parts of 10～25 parts, aluminium hydroxide and magnesium hydroxides and be jointly placed in mixer and be uniformly mixed; UtilizeIn the time that friction is preheated to 95～150 DEG C; By the absolute ethyl alcohol mixing diluents of 0.80～1.5 part of coupling agent and equal in quality part,And be divided into and be spilled into or be vaporific spraying in mixer for 2-4 time, continue to stir 10-15 minute, make surface treated hydroxideAluminium and magnesium hydrate powder;
Step 2: the aluminium hydroxide that step 1 is made and magnesium hydrate powder are divided into and join for 2-3 time in banbury, in temperatureFor 110-140 DEG C, rotating speed are 25-35rpm, under the condition of be not more than-0.09MPa of pressure with 17.5～22.5 parts of ethylene methacrylicsBase organosilicon rubber mixes jointly, makes compound A;
Step 3: by 15～25 parts of white carbons, 1.5～3 parts of nano imvites, 2～5.8 parts of constitution controllers, iron oxide red2～4 parts join in banbury jointly, are 110-140 DEG C in temperature, and rotating speed is 25-35rpm, be not more than-0.09MPa of pressureCondition under jointly mix with 17.5～22.5 parts of methyl ethylene organosilicon rubbers, make compound B;
Step 4: described compound A and compound B are placed in to banbury jointly, are 140-160 DEG C in temperature, and rotating speed isUnder the condition of 25-35rpm, fully mix, make compound C;
Step 5: compound C is placed at normal temperatures and is not less than 24 hours, more at normal temperatures through thin-pass back mixing and filter out particle diameterBe greater than the blend glue stuff D that the impurity of 250 μ m makes;
Step 6: blend glue stuff D is evenly mixed and be get final product through rubber mixing machine with 0.4～0.8 part of crosslinking agent at the temperature of 30-70 DEG CMedium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material.
The feature of the manufacturing process of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material of the present invention is also:
In described step 5, thin-pass back mixing is to adopt twin-roll machine, and the thin-pass roll spacing of described twin-roll machine is 0.5-5mm, thin-pass number of times 3-5Inferior.
Rubber mixing machine in described step 6 is opening rubber mixing machine, and it is 1-12mm that two roller roll spacings in described opening rubber mixing machine are set.
The application of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material of the present invention is: by described medium pressure grade low-smoke non-halogen flame-retardant silicon rubberGlue insulating materials is by rubber extruding machine extrusion molding, and described rubber extruding machine is evenly segmented into a district, two He San districts of district from charging aperture to head,Linear velocity is 15-35m/min, makes cable insulation.
Compared with the prior art, beneficial effect of the present invention is embodied in:
1, the base material in the present invention has been selected methyl ethylene organosilicon rubber, and it has good elasticity, ageing-resistant performance, hasExcellent electrical insulation properties has increased iron oxide red in component, has improved the heat resistance of organic material; 110-2 type boardNumber, contents of ethylene is higher, easily crosslinked; Material heat ageing and permanent deformation performance also have obvious improvement, and processing performance is good, hasProfit is descended sheet, is extruded.
2, in material of the present invention, adopt fume colloidal silica, with respect to precipitated silica, the mechanical performance of insulating materials is significantly carriedHeight, has improved tensile strength and the tear strength of material greatly, and dielectric properties are also good, and resistance to water is superior.
3, in the present invention, crosslinking agent adopts peroxide cross-linking agent, is applicable to supersaturated vapor cross-linking reaction, and crosslinking rate is fast, is difficult forThe advantages such as foaming.
4, the constitution controller that the present invention adds, strong with the organic and inorganic thing affinity such as silicon rubber, white carbon, aluminium hydroxide,Can greatly reduce " structuring " effect of material, improve mechanical performance and the processing characteristics of material.
5, the present invention adopts coupling agent to carry out surface treatment to powder body materials such as inorganic combustion inhibitors, has improved powder body material, inorganic material" adhesion " between material, not only can improve the mechanical property of material, has fallen but also greatly carry the difficult processing that material mixes manufactureDegree. In process, adopt and ethanol mixing diluents, improve uniformity and the effect of powder body material surface processing,Also improve hybrid process production efficiency.
6, in formula constituent of the present invention, add nano imvite, reduced the use of fire retardant aluminium hydroxide, magnesium hydrate powder materialAmount, has improved its flame retardant effect, thereby in improving the flame retardant effect of material, improves mechanical performance and the electrical resistance of materialEnergy level is the important innovative point of the present invention.
7, in manufacturing process of the present invention, adopt substep hybrid process, improve the mixing uniformity between organic and inorganic material, preventOr the generation of " gathering " phenomenon of reduction inorganic powder material, improve the uniformity of the mixing of material.
8, materials processing of the present invention adopts supersaturated vapor sulfuration, the one, production efficiency than the fast 3-5 of post vulcanization doubly, the 2nd,Owing to there being the pressure of 0.3-0.9MPa, the post vulcanization under normal pressure, reduces the generation of insulating barrier bubble relatively, has greatly improved absolutelyThe electric property of edge layer, has also improved the mechanical performance of material.
Detailed description of the invention
In concrete enforcement, medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material of the present invention, by mass parts raw material form asTable 1 is listed as:
Table 1 medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material component proportioning
In concrete enforcement, methyl ethylene organosilicon rubber is 110-2 type, and vinyl molfraction is 0.10～0.15%, heavyAll relative molecular weight 46～600,000; White carbon is gas-phase process manufacture; Crosslinking agent is 2,5-dimethyl-2,5 di-t-butylsPeroxidating hexane DBPMH or 2,4-dichlorobenzoperoxide DCBP or cumyl peroxide DCP; Constitution controller is twoDiphenyl silanediol, hydroxy silicon oil or its composition; Coupling agent is silane coupler, alkoxyl titanate coupling agent, pyrophosphoric acid typeTitanium ester acid coupling agent or aluminate coupling agent.
The manufacturing process of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material, is characterized in that carrying out according to the following steps:
Step 1: in proportion, pour aluminium hydroxide, magnesium hydrate powder into SHR type high-speed mixer high-speed stirred, utilize itBe preheated to after 95～150 DEG C of temperature from friction, point 2-4 slow being spilled into or the vaporific coupling agent that sprays into, continues high-speed mixing and stirs10-15min completes aluminium hydroxide, magnesium hydroxide and coupling agent course of reaction in higher temperature;
In concrete enforcement, coupling agent will be pressed 1:1 mixed solvent with absolute ethyl alcohol diluent.
Step 2: by aluminium hydroxide, magnesium hydrate powder after the prepared surface treatment of step 1, a point 2-3 criticizes and joins heightSpeed banbury in, at temperature 110-140 DEG C, starch soon rotating speed 25-35Rpm, under be less than-0.09Mpa of vacuum pressure with proportioning inHalf methyl ethylene organosilicon rubber amount mix, make compound A.
Step 3: white carbon, nano imvite, constitution controller, iron oxide red in mass ratio example join high speed banburyIn, at temperature 110-140 DEG C, starch soon rotating speed 25-35Rpm, under be less than-0.09Mpa of vacuum pressure with proportioning surplus methylVinyl organosilicon rubber mixes, and makes compound B.
Step 4: the compound A that the 2nd step is made pours in high speed banbury, in temperature together with making compound B with the 3rd stepDegree 140-160 DEG C, starches under rotating speed 25-35Rpm soon through fully mixing, composite material C.
Step 5: placement back mixing after at least 24 hours, filtration under composite material C normal temperature, obtain insulating cement D; When back mixing, makeWith thin-pass roll spacing be 0.5-5mm, 3-5 slice of thin-pass number of times; Filtration is to complete by filter, and the filter screen of filter isThree layers, order number is respectively 60,80,120.
Step 6: blend glue stuff D mixes through mill with crosslinking agent, makes insulating materials of the present invention; Mill is for openFormula rubber mixing machine, 30～70 DEG C of the temperature of twin-roll mixing, roll spacing is 4-12mm.
In concrete enforcement, when Insulation Material is extruded, body temperature 1st district of rubber extruding machine is 50 ± 5 DEG C, and 2nd district are 60 ± 5 DEG C, and 3rd district are65 ± 5 DEG C, head temperature is 70 ± 5 DEG C, and rubber extruding machine screw rod adopts water cooling, extrudes rear employing supersaturated vapor pressure and isThe pressure of 0.3-0.9MPa vulcanizes online, and going out linear velocity is 20-35m/min.
In table 1, embodiment 1 is because inorganic fill is more, and material cost price is lower, and material flame retardant effect is also best; ImplementExample 4 inorganic material content are minimum, and the electric property of material is best, and mechanical index is also higher, but hinder right weak effect.
Medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material of the present invention, can reach technical indicator shown in table 2:
Claims (3)
1. a manufacturing process for medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material, is characterized in that carrying out according to the following steps, stepIn rapid, the amount of taking of each raw material is all by mass parts:
Step 1: get 10～18 parts of 10～25 parts, aluminium hydroxide and magnesium hydroxides and be jointly placed in mixer and be uniformly mixed; UtilizeIn the time that friction is preheated to 95～150 DEG C; By the absolute ethyl alcohol mixing diluents of 0.80～1.5 part of coupling agent and equal in quality part,And be divided into and be spilled into or be vaporific spraying in mixer for 2-4 time, continue to stir 10-15 minute, make surface treated hydroxideAluminium and magnesium hydrate powder;
Step 2: the aluminium hydroxide that step 1 is made and magnesium hydrate powder are divided into and join for 2-3 time in banbury, in temperatureFor 110-140 DEG C, rotating speed are 25-35rpm, under the condition of be not more than-0.09MPa of pressure with 17.5～22.5 parts of ethylene methacrylicsBase organosilicon rubber mixes jointly, makes compound A;
Step 3: by 15～25 parts of white carbons, 1.5～3 parts of nano imvites, 2～5.8 parts of constitution controllers, iron oxide red2～4 parts join in banbury jointly, are 110-140 DEG C in temperature, and rotating speed is 25-35rpm, be not more than-0.09MPa of pressureCondition under jointly mix with 17.5～22.5 parts of methyl ethylene organosilicon rubbers, make compound B;
Step 4: described compound A and compound B are placed in to banbury jointly, are 140-160 DEG C in temperature, and rotating speed isUnder the condition of 25-35rpm, fully mix, make compound C;
Step 5: compound C is placed at normal temperatures and is not less than 24 hours, more at normal temperatures through thin-pass back mixing and filter out particle diameterBe greater than the blend glue stuff D that the impurity of 250 μ m makes;
Step 6: blend glue stuff D is evenly mixed and be get final product through rubber mixing machine with 0.4～0.8 part of crosslinking agent at the temperature of 30-70 DEG CMedium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material.
2. the manufacturing process of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material according to claim 1, is characterized in that:In described step 5, thin-pass back mixing is to adopt twin-roll machine, and the thin-pass roll spacing of described twin-roll machine is 0.5-5mm, thin-pass number of times 3-5 time.
3. the manufacturing process of medium pressure grade low-smoke non-halogen flame-retardant silicon rubber insulation material according to claim 1, is characterized in that:Rubber mixing machine in described step 6 is opening rubber mixing machine, and it is 1-12mm that two roller roll spacings in described opening rubber mixing machine are set.
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| CN104497581A (en) * | 2014-12-17 | 2015-04-08 | 苏州锦腾电子科技有限公司 | Heat-resistant single-component room-temperature vulcanized liquid silicone rubber and preparation method thereof |
| CN105034192B (en) * | 2015-06-18 | 2017-10-31 | 安正（天津）新材料股份有限公司 | 110 500kV of one kind insulation material manufacturing techniques |
| CN105348800A (en) * | 2015-11-24 | 2016-02-24 | 江苏华富储能新技术股份有限公司 | Flame-retardant insulating material |
| CN105778151A (en) * | 2016-05-11 | 2016-07-20 | 闽江学院 | Halogen-free flame retardant for silica gel, application of halogen-free flame retardant and flame-retardant silica gel product |
| CN105949784A (en) * | 2016-05-12 | 2016-09-21 | 东莞市联洲知识产权运营管理有限公司 | Efficient insulating heat-resisting silicone rubber cable material and preparation method thereof |
| CN106084359A (en) * | 2016-07-12 | 2016-11-09 | 陕西理工学院 | A kind of halogen-free environment-friendly type flame-proof rubber and preparation method thereof |
| CN106977926A (en) * | 2017-04-24 | 2017-07-25 | 新昌县恩喜电器有限公司 | A kind of three phase combined over-voltage protector sulphurated siliastic |
| CN112898688A (en) * | 2021-01-20 | 2021-06-04 | 武汉科锐电气股份有限公司 | Medium-low voltage grade halogen-free flame-retardant ethylene propylene rubber insulating material and preparation method thereof |
| CN113025045A (en) * | 2021-02-23 | 2021-06-25 | 安徽中鼎密封件股份有限公司 | High-strength low-density halogen-free flame-retardant silica gel material and preparation method thereof |
| CN116102887A (en) * | 2022-10-28 | 2023-05-12 | 南方电网科学研究院有限责任公司 | Umbrella skirt material of silicon rubber insulator, preparation method and application of silicon rubber insulator |
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| CN101747631A (en) * | 2008-12-01 | 2010-06-23 | 中国科学院过程工程研究所 | Flame-retardant room temperature vulcanized silicone rubber composition |
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| CN101747631A (en) * | 2008-12-01 | 2010-06-23 | 中国科学院过程工程研究所 | Flame-retardant room temperature vulcanized silicone rubber composition |
| CN102093718A (en) * | 2010-11-19 | 2011-06-15 | 四川大学 | Method for preparing silicone rubber foam material with low density and high opening rate |
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Denomination of invention: Intermediate pressure level low-smoke zero-halogen flame-retardant silicon rubber insulating material and manufacturing process thereof Effective date of registration: 20180615 Granted publication date: 20160525 Pledgee: Wuwei Silver Village bank limited liability company Pledgor: ANHUI HANGTIAN CABLE GROUP CO., LTD. Registration number: 2018340000208 |