CN102746558B - Insulating spider resistant to electrical carbon mark - Google Patents
Insulating spider resistant to electrical carbon mark Download PDFInfo
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- CN102746558B CN102746558B CN201210258334.XA CN201210258334A CN102746558B CN 102746558 B CN102746558 B CN 102746558B CN 201210258334 A CN201210258334 A CN 201210258334A CN 102746558 B CN102746558 B CN 102746558B
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Abstract
The invention relates to an insulating spider resistant to electrical carbon mark in power cable thermal shrinkage terminal parts and components. The insulating spider is characterized by consisting of the following raw materials: low-density polyethylene or a POE (polyolefin elastomer), polyethylene-vinyl acetate or polyethylene-ethyl acrylate, an antioxidant 1010, a flame retardant, high-molecular wax and zinc stearate, wherein the flame retardant is melamine cyanurate and/or melamine isocyanuric acid salt, and also containing any one of aluminum hydroxide micro powder, magnesium hydroxide micro powder, iron oxide powder, light calcium carbonate, kaoline and talc powder, as well as color masterbatch or dye. The insulating spider has the advantages of good miscibility, easy molding, good appearance quality, high arc resistance and creepage resistance, good insulating effect, long service life and the like.
Description
Technical field
the present invention relates to the improvement of spider in cable hot shrinkage terminal auxiliary equipment, specifically, is a kind of insulation spider of the trace of resistance to electrical carbon.
Background technology
after cable hot shrinkage terminal is installed, the insulation distance from connection terminal to ground portion is an important factor of the operating peaceful property of this series products.The spider that existing pyrocondensation power cable terminal annex is used only plays the separately supporting role of cable core mostly.Existing spider consists of following raw material, EVA, polyethylene, acetylene carbon black, Zinic stearas, anti-aging agent RD (2,2,4-trimethylammonium-1,2-dihyaroquinoline polymkeric substance) and macromolecule wax.Because not contained the material of resistance to electric trace effect in formula, moreover contain a large amount of carbon blacks in formula, the introducing of carbon black is to have a stable shape to keep while shrinking and must not be added in order to make to be enclosed within, as everyone knows, carbon black is electro-conductive material, its introducing greatly reduces the insulativity of spider, also makes spider lose resistance to creepage performance.In order to solve the resistance to creepage problem of spider, those skilled in the art are also exploring, for example: dose picture light calcium carbonate powder, aluminium hydrate powder, magnesium hydroxide powder, white carbon black etc., dimensionally stable problem when these fillers have all solved spider thermal contraction, also can provide resistance to creepage effect for spider.But in actual production technological process, remain at some and be fundamentally difficult to the technical problem overcoming, it is mainly injection spider cracking and rough, there are serious numb line or bubble, injection oral area has and burns, and expansion and retraction also have cracking while installing, up to now, the spider of prior art not yet solves the root problem of the poor insulativity of the trace of resistance to electrical carbon, does not also have bibliographical information and the practical application of and close spider identical with content of the present invention.
Summary of the invention
the object of the invention is prior art to carry out substantial improvements and innovation, a kind of insulation spider of the trace of resistance to electrical carbon is provided, the various materials that form the insulation spider of the trace of resistance to electrical carbon have good compatibility, easy-formation, visual appearance is good, arc resistance, resistance to creepage, insulation effect good, the advantages such as long service life.
realizing the technical scheme that object of the present invention adopts is, a kind of insulation spider of the trace of resistance to electrical carbon, it is characterized in that: raw material that it contains following weight parts forms, Low Density Polyethylene or POE elastomerics: 5～10 parts, EVA or 8～12 parts of polyethylene-ethyl propenoates, antioxidant 1010 are 0～0.2 part of 0.1～0.2 part, 2.5～8 parts of fire retardants, 0.5～1 part of macromolecule wax and Zinic stearas.
described fire retardant is melamine cyanurate and/or trimeric cyanamide isocyanurate.
described melamine cyanurate and trimeric cyanamide isocyanurate are micro mist, its granularity≤2 μ m, dry vector≤0.3%.
also contain any one in fine aluminum hydroxide powder, magnesium hydroxide micro mist, brown iron oxide, light calcium carbonate, potter's clay, talcum powder, its weight part is 0～7 part, granularity≤2 μ m, dry vector≤0.3%.
also contain colour batch or dyestuff, its weight part is 0.5～0.6 part.
the present invention adopts the carbon black of nitrogenous halogen-free environment-friendly type flame-proof agent melamine cyanurate and/or the alternative prior art of trimeric cyanamide isocyanurate as filler, the spider that makes to insulate has obtained excellent resistance to electric vestige, also makes annex integral body increase by the creepage distance of 170～210mm; Meanwhile, owing to abandoning using carbon black, also improved production environment, can make product painted by dosing pigment or dyestuff again, product color variation; Can be widely used in 1,10, in the indoor outer terminal attachment of 35KV pyrocondensation power cable; Because the length of insulation spider is large between 170～210mm, the insulated lengths of increase approximately can be equivalent to the length of the increase insulation distance that two single hole rain skirts play, so apply after this type of spider, every cover can be saved 6 single hole rain skirts; If do not reduce the use of rain skirt, be equivalent to increase by two rain skirts, the safe distance of product increases greatly, insulation is enclosed within the operational process after installation, safety performance improves greatly, is especially being applied to open air and filthy occasion, and its safety performance and stability are better; At some in particular cases, when application space hour, can shorten the insulated lengths of 200mm left and right, whole terminal is done littlely, and play and the resistance to creepage effect originally equating, there is the economy of use, efficient, excellent electrical property and mechanical property, nondiscoloration, low cigarette, low-corrosiveness, the thermostability good, good with Environmental compatibility, the very processing of appropriate materials, good flame retardation effect, consumption is few, nontoxic, there is easy-formation, visual appearance is good, and arc resistance, resistance to creepage property, insulation effect are good, the advantages such as long service life.
Accompanying drawing explanation
fig. 1 is the insulation spider structural representation (A-A sectional view in Fig. 2) of the trace of resistance to electrical carbon;
fig. 2 is the schematic top plan view of Fig. 1.
Embodiment
the invention will be further described to utilize drawings and Examples below.
see figures.1.and.2, raw material that the insulation spider of the trace of resistance to electrical carbon of the present invention contains following weight parts forms, Low Density Polyethylene or POE elastomerics: 5～10 parts, EVA or 8～12 parts of polyethylene-ethyl propenoates, antioxidant 1010 are 0～0.2 part of 0.1～0.2 part, 2.5～8 parts of fire retardants, 0.5～1 part of macromolecule wax and Zinic stearas.Described fire retardant is melamine cyanurate and/or trimeric cyanamide isocyanurate.Described melamine cyanurate and trimeric cyanamide isocyanurate are micro mist, its granularity≤2 μ m, dry vector≤0.3%.Also contain any one in fine aluminum hydroxide powder, magnesium hydroxide micro mist, brown iron oxide, light calcium carbonate, potter's clay, talcum powder, its weight part is 0～7 part, granularity≤2 μ m, dry vector≤0.3%.Also contain colour batch or dyestuff, its weight part is 0.5～0.6 part.
fig. 1 and Fig. 2 are a kind of structural representations of insulation spider of the trace of resistance to electrical carbon, and formula of the present invention is applicable to the insulation spider of the serial trace of resistance to electrical carbon.
the making of the insulation spider of the present invention's trace of resistance to electrical carbon still adopts traditional technology, through batching-mixing-granulation-injection-irradiation-process of expansion, completes.
mixing use out refining or banburying all can, open 125～145 ℃ of refining roller temperature, be less than under 0.4mm thickness thin-pass three times, every batch of used time is no less than 45 minutes, lower directly pelletizing also can extruding pelletization.210～215 ℃ of injection temperatures, injection pressure 60～90MPa, 40～65 ℃ of die temperatures, 2 minutes injection molding cycles.Irradiation source is Co60 or rumbatron, dosage 11～14Mrad, 120～140 ℃ of expansion temperature.
the main base polymeric material of the present invention is polyolefins, selects Low Density Polyethylene (PE) or polyolefine POE elastomerics; EVA (EVA) or polyethylene-ethyl propenoate EEA).Low density PE, because crystallinity is large, is easily orientated and the anisotropy of formation product during injection, and the shape while finally causing product to be heated retraction is unstable, but low density PE can make injection process move back mould, easily shortens shaping cycle.Using melamine cyanurate and/or trimeric cyanamide isocyanurate is all micro mist, the dimensionally stable framework material during as the thermal contraction of thermal contraction product.It has good shape heat resistanceheat resistant stability, has again extremely outstanding lubrication and fire retardation, makes injection molding rapid, and surface quality is good.This is that general mineral filler is very inaccessible.As the melamine cyanurate of fire retardant and/or the introducing of trimeric cyanamide isocyanurate, do not change technological process and the processing condition of spider making processes, but make spider have the special trace of resistance to electrical carbon performance, cable terminal end safe operation is needed just for this.This fire retardant can be used as filler and adds separately formulation material, also can coordinate and add with other mineral filler.As fine aluminum hydroxide powder, magnesium hydroxide micro mist, brown iron oxide, light calcium carbonate, potter's clay, talcum powder etc.
the present invention is raw materials used to be easy to get, wherein: Low Density Polyethylene LD-607 is produced by Beijing Yanshan Petrochemical Company; EVA EVA18-3 is produced by the red company limited of Beijing Orient; Colour batch is produced by Changzhou red prunosus masterbatch company limited; Antioxidant 1010 is produced by Beijing Chemical Factory No. 3; Melamine cyanurate and trimeric cyanamide isocyanurate as fire retardant are produced by Jinan Jin Yingtai Chemical Co., Ltd.; Macromolecule wax is produced by Shanghai Venus plastics company limited; Fine aluminum hydroxide powder, magnesium hydroxide micro mist, brown iron oxide, light calcium carbonate, potter's clay, talcum powder are produced by Inner Mongol Hao Hai Chemical Co., Ltd., Dalian company of Yatai Group; Red iron oxide is produced by Baeyer Shanghai pigment company.
embodiment 1: the insulation spider of the trace of resistance to electrical carbon contains: Low Density Polyethylene 5 ㎏, EVA 8 ㎏, antioxidant 1010 is 0.10 ㎏, fire retardant is melamine cyanurate and trimeric cyanamide isocyanurate totally 2.5 ㎏, wherein, melamine cyanurate 1.5 ㎏, trimeric cyanamide isocyanurate 1 ㎏, macromolecule wax 0.5 ㎏, magnesium hydroxide micro mist 7 ㎏, colour batch or red iron oxide 0.5 ㎏.
embodiment 2: the insulation spider of the trace of resistance to electrical carbon contains: Low Density Polyethylene 8 ㎏, EVA 10 ㎏, antioxidant 1010 is 0.15 ㎏, melamine cyanurate and trimeric cyanamide isocyanurate be totally 5 ㎏, macromolecule wax 0.75 ㎏, Zinic stearas 0.1 ㎏, magnesium hydroxide micro mist 3.5 ㎏, colour batch or red iron oxide 0.5 ㎏.
embodiment 3: the insulation spider of the trace of resistance to electrical carbon contains: Low Density Polyethylene 10 ㎏, EVA 12 ㎏, antioxidant 1010 is 0.20 ㎏, fire retardant is melamine cyanurate and each 4 ㎏ of trimeric cyanamide isocyanurate, totally 8 ㎏, macromolecule wax 1 ㎏, Zinic stearas 0.2 ㎏, colour batch or red iron oxide 0.6 ㎏.
the insulation spider of embodiment 4 traces of resistance to electrical carbon contains: POE elastomerics 5 ㎏, and polyethylene-ethyl propenoate 12 ㎏, antioxidant 1010 is 0.15 ㎏, melamine cyanurate 5 ㎏, macromolecule wax 0.8 ㎏, Zinic stearas 0.1 ㎏, brown iron oxide 3.5 ㎏, colour batch 0.5 ㎏.
the insulation spider of embodiment 5 traces of resistance to electrical carbon contains: POE elastomerics 8 ㎏, and polyethylene-ethyl propenoate 10 ㎏, antioxidant 1010 is 0.20 ㎏, melamine cyanurate 8 ㎏, macromolecule wax 1 ㎏, Zinic stearas 0.2 ㎏, red iron oxide 0.5 ㎏.
the insulation spider of embodiment 6 traces of resistance to electrical carbon contains: POE elastomerics 10 ㎏, and polyethylene-ethyl propenoate 8 ㎏, antioxidant 1010 is 0.10 ㎏, trimeric cyanamide isocyanurate 2.5 ㎏, macromolecule wax 0.5 ㎏, talcum powder 7 ㎏, colour batch 0.6 ㎏.
under the making processes condition the same with processing condition, irradiation dose 13Mrad, result contrast
| ? | Injection molding surface | Moulding process | Expansion technique | Hot retracted state |
| Embodiment 1 | Smooth surface, does not have numb line | Shaping cycle is long, and Qi Mo is more difficult, large more obvious of length-to-diameter ratio | Good expansion, does not break | During retraction, shape keeps slightly poor, does not burn |
| Embodiment 2 | Smooth surface, does not have numb line | Shaping cycle 2 minutes, opens mould easy | During expansion, crackle not | During retraction, shape keeps, and does not burn |
| Embodiment 3 | Smooth surface, does not have numb line | Shaping cycle 2 minutes, opens mould easy | Good expansion, does not break | During retraction, shape keeps, and does not burn |
| Embodiment 4 | Smooth surface, does not have numb line | Shaping cycle 2 minutes, opens mould easy | Good expansion, does not break | During retraction, shape keeps, and does not burn |
| Embodiment 5 | Smooth surface, does not have numb line | Shaping cycle 2 minutes, opens mould easy | Good expansion, does not break | During retraction, shape keeps, and does not burn |
| Embodiment 6 | Smooth surface, does not have numb line | Shaping cycle 2 minutes, opens mould easy | Good expansion, does not break | During retraction, shape keeps, and does not burn |
illustrate: the test-results of embodiment 1-6 shows, the insulation spider of the trace of resistance to electrical carbon of the present invention can be in described formula range, by operations such as injection molding, irradiation, expansions, make, when selecting the amount of melamine cyanurate and/or trimeric cyanamide isocyanurate fire retardant less, add in right amount any one in fine aluminum hydroxide powder as mineral filler, magnesium hydroxide micro mist, brown iron oxide, light calcium carbonate, potter's clay, talcum powder, make injection molding become normal, Qi Mo also becomes easily, and during heat retraction, shape keeps.Because dimensionally stable effect when mineral filler has been played the resistance to electric charcoal trace effect of product and retraction, also has lubrication, make product surface smooth, quality improves greatly.
on probation through 1 year of the insulation spider of the trace of resistance to electrical carbon of the present invention, effect is remarkable, has realized the object of the invention and has reached described effect.
the embodiment that the present invention is given, is only limited embodiment, and non exhaustive, and those skilled in the art are any without the copying and improving of creative work, and still belong to the scope that the claims in the present invention are protected.
Claims (2)
1.
a kind of insulation spider of the trace of resistance to electrical carbon, it is characterized in that: the raw material that it contains following weight parts, Low Density Polyethylene or POE elastomerics: 5～10 parts, EVA or 8～12 parts of polyethylene-ethyl propenoates, antioxidant 1010 are 0～0.2 part of 0.1～0.2 part, 2.5～8 parts of fire retardants, 0.5～1 part of macromolecule wax and Zinic stearas, and described fire retardant is melamine cyanurate.
2.
the insulation spider of the trace of resistance to electrical carbon according to claim 1, is characterized in that: described melamine cyanurate is micro mist, its granularity≤2 μ m, dry vector≤0.3%.
3. the insulation spider of the trace of resistance to electrical carbon according to claim 1, it is characterized in that: also contain any one in fine aluminum hydroxide powder, magnesium hydroxide micro mist, brown iron oxide, light calcium carbonate, potter's clay, talcum powder, its weight part is 3.5～7 parts, granularity≤2 μ m, dry vector≤0.3%.
4. the insulation spider of the trace of resistance to electrical carbon according to claim 1, is characterized in that: also contain colour batch or dyestuff, its weight part is 0.5～0.6 part.
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| CN201210258334.XA CN102746558B (en) | 2012-07-25 | 2012-07-25 | Insulating spider resistant to electrical carbon mark |
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| CN102746558B true CN102746558B (en) | 2014-01-22 |
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| CN103928109B (en) * | 2014-04-26 | 2016-08-17 | 芜湖航天特种电缆厂 | Special cable |
| CN105713291B (en) * | 2016-04-29 | 2018-06-12 | 上海工程技术大学 | It is a kind of as insulating materials for preparing aerial insulated cable and preparation method thereof |
| CN106317589A (en) * | 2016-08-18 | 2017-01-11 | 苏州泰斯拓伟机电设备有限公司 | Radiation crosslinking butadiene styrene rubber heat shrink tube and preparation method thereof |
| CN106317557A (en) * | 2016-08-18 | 2017-01-11 | 苏州泰斯拓伟机电设备有限公司 | Insulating heat shrink tube for high-speed railway track and preparation method of tube |
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| CN102120839A (en) * | 2010-10-13 | 2011-07-13 | 成都亨通光通信有限公司 | Anti-tracking polyethylene sheathing material |
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| KR101175852B1 (en) * | 2007-09-07 | 2012-08-24 | 유니띠까 가부시키가이샤 | Flame-retardant glass-fiber-reinforced polyamide resin composition |
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| CN102120839A (en) * | 2010-10-13 | 2011-07-13 | 成都亨通光通信有限公司 | Anti-tracking polyethylene sheathing material |
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