CN102306513A - Expansion type environment-friendly halogen-free high-flame retardant and fire-resistant cable and method thereof - Google Patents
Expansion type environment-friendly halogen-free high-flame retardant and fire-resistant cable and method thereof Download PDFInfo
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Abstract
The invention relates to an expansion type environment-friendly halogen-free high-flame retardant and fire-resistant cable and a method thereof. The cable is characterized in that: each core sequentially consists of conductors, a silicon rubber insulating layer, a filler, a flame retardant oxygen separation layer, an aluminum-plastic composite tape insulation layer and an expansion type fire-resistant outer protective layer made of low-smoke halogen-free flame retardant polyolefin from inside to outside, and adopts a fire-resistant cable structure formed by combining the expansion type fire-resistant outer protective layer made of the low-smoke halogen-free flame retardant polyolefin, the aluminum-plastic composite tape insulation layer and the silicon rubber insulating layer; and a flame retardant oxygen separation layer structure is formed by a halogen-free high-flame retardant material coated with metal hydrates. The preparation method comprises the following steps of: drawing single lines, performing annealing, twisting the conductors, insulating silicon rubber, cabling, and preparing the flame retardant oxygen separation layer, the aluminum-plastic composite tape insulation layer and the expansion type refractory outer protective layer made of the low-smoke halogen-free flame retardant polyolefin. The cable provided by the invention is easy to process, the external diameter of the cable is smaller than that of the traditional cable by 2 to 4 millimeters, and the structure can be obviously lightened.
Description
Technical field
The present invention relates to a kind of fire-resistant expansion type halogen-free environment protection high flame resistance cable and method, described cable can be widely used in skyscraper, commercial dwelling house, market, hospital, power station, subway, hotels and other places, belongs to the cable technology field.
Background technology
Along with progress and the development of science and technology and the human requirement to biological environment of society, each state all is devoted to develop environment-friendly cable.In recent years; European Union implements green instruction such as " WEEE instruction ", " ROHS instruction " and " EUP instruction " successively, particularly after in December, 2009 Copenhagen meeting, and low-carbon economy; The environmental protection notion is rooted in the hearts of the people, and environment-friendly cable will be the electric wire Development Trend.
Yet; Polyvinyl chloride insulation and jacketed cable that current widely used flame retardant cable mainly is the Halogen flame-retardant system; Or the low-smoke halogen-free flame-retardant polyolefin cable of interpolation metal hydroxides flame-retardant system; Though they have satisfied the fire-retardant requirement of people to cable to a certain extent, can produce secondary harm during the burning of the ignition of cable of Halogen flame-retardant system, thereby strengthen the loss that fire brings.Though low-smoke halogen-free flame-retardant polyolefin cable can overcome the dense smoke that produces when the Halogen flame retardant cable is met fire burns; Discharge shortcomings such as poisonous corrosive gas; Also can solve common flame retardant cable simultaneously and be prone to problems such as aging, black brittleness difference, but there are problems such as mechanical property, electrical property, processing characteristics be not ideal enough in this type cable.
Common fire-resisting cable has wrapped polyvinyl chloride insulation of mica tape or crosslinked polyetylene insulated fire-resisting cable, mineral magnesia insulated copper sheath fire-resisting cable.The former is present domestic comparatively general fire-resisting cable; Its structure is the same basically with common cable, and difference is to be provided with by the wrapped flame retardant coating that forms of mica tape between conductor and the insulation, and this flame retardant coating has certain fire-resistance property; In case but cable is met fire burns; The macromolecular material that constitutes cable very easily burns, and what keep that the integrality of circuit relies on is mica tape, thereby the unusual key of the selection of mica tape and processing technology.The fire-resisting cable stability of domestic this structure is very poor at present, and the fire-resisting cable quality of different manufacturers is uneven.The latter is the very excellent safety-type cable of a kind of performance, and by copper conductor, insulation of inorganic oxide magnesium and copper sheath three combination process; Because the inorganic insulation characteristic of mineral insulated cable particular structure and materials used, make mineral insulated cable have fire-resistant, explosion-proof, waterproof is corrosion-resistant, the mechanical strength height; Characteristics such as ampacity is big, but cable cost is comparatively expensive, and manufacturing process is complicated; Production length is short; And terminal attachment polylinker point is weak, and installation is trouble, thereby does not suit extensively to promote the use of.
Environmental safety and safety in utilization fire-retardant, fire-resistant, the halogen-free flame-retardant cable product are being required under the prerequisite of increasingly stringent, and new type of halogen-free flame retardant cable has become one of emphasis R&D direction of home and abroad line cable industry.Late nineteen nineties in 20th century; Each big polymeric material manufacturer and correlative study mechanism have begun the research to the low-smoke halogen-free flame-retardant polyolefin cable material both at home and abroad; Develop the halogen-free flame-retardant cable technology energetically; And the low-smoke halogen-free flame-retardant polyolefin cable material of multiple flame-retardant system has been proposed, with metal hydroxides (like magnesium hydroxide Mg (OH)
2, aluminium hydroxide Al (OH)
3Deng) flame-retardant system is that main low-smoke halogen-free flame-retardant polyolefin cable has obtained rapidly applying on a large scale; But the domestic so far understanding to low-smoke halogen-free flame-retardant polyolefin cable still is confined to issue unboiled water through metal hydroxides in hot conditions divides gasification to reduce the material surface temperature; Thereby reach the requirement of halogen-free flameproof; But the halogen-free flame-retardant cable of metal hydroxides flame-retardant system; Be prone to absorb airborne moisture, and poor with the compatibility of matrix resin, and desire obtains high flame resistance need add a large amount of flame retardant fillers; High filler loading capacity must cause the intensity of polymer and percentage elongation significantly to reduce, thereby very big to Mechanics of Machinery, electrical property and the processing characteristics influence of material.
To fire-retardant, fire-resistant, the present situation of low-smoke halogen-free flame-retardant polyolefin cable and the problem of existence; The application intends from environmental safety and safety in utilization angle; In structural design, take into full account the flame-retardant performance and the environmental protection performance of cable, abandoning tradition fire-resisting cable structure and extrude the oxygen barrier layer structure; And through to rationally the selecting for use of insulating barrier and outer sheath material, thereby developed the fire-resistant environment-friendly cable of a kind of silicon rubber insulation expansion type low-smoke halogen-free fire retardant polyolefin.
Summary of the invention
The object of the present invention is to provide a kind of fire-resistant expansion type halogen-free environment protection high flame resistance cable and method, the environment-friendly cable that is provided is the fire-resistant oversheath environment-friendly cable of a kind of silicon rubber insulation expansion type low-smoke halogen-free fire retardant polyolefin.This fire-resistant expansion type low-smoke halogen-free high flame retardant polyolefin environment-friendly cable conductor need not wrapped mica tape outward; Insulating barrier adopts silastic material; The outer wrapped halogen-free high flame-retardant band of cable core forms novel oxygen barrier layer; Thermal insulation layer adopts aluminium-plastic tape wrapped, and outer jacket adopts the fire-resistant protective cover material of expansion type low-smoke halogen-free fire retardant polyolefin.Because silicone rubber insulation layer still keeps the excellent electric insulation performance under flame temperature, and to form with silicon dioxide at conductive surface be the duricrust inorganic insulator of main body, and insulation property stable guaranteed cable operate as normal for a long time under flame temperature.The wrapped halogen-free high flame-retardant band of cable core forms novel oxygen barrier layer, plays oxygen barrier, fire retardation; The wrapped formation thermal insulation layer of aluminium-plastic tape plays heat insulation, reflecting heat effect.Outer jacket adopts the fire-resistant sheath new material of expansion type low-smoke halogen-free fire retardant polyolefin, and this material is under hot conditions, through the chemical action between the different components (charcoal source, acid source, source of the gas); Form the dense char layer in the material surface expansion, heat insulation, oxygen barrier effect that expanding layer has reduces being radiated the heat on the outer jacket on the one hand; Reduce surface temperature; Stop outer jacket further degraded and burning, reduce the combustible of thermal degradation generation and the diffusion of oxygen on the other hand, suppress flame and further spread.Fire-resistant expansion type halogen-free environment protection high flame resistance cable not only can intercept burning things which may cause a fire disaster and further burn when breaking out of fire, prolongs the fire-resistant operating time of cable; And the amount of being fuming is low; Can not produce toxic and harmful, effectively eliminate secondary harm, improve safety in utilization and environmental safety.
A kind of fire-resistant expansion type halogen-free environment protection high flame resistance cable provided by the invention (abbreviation environment-friendly cable) performance technologies index is:
(1) the PH weighted value of solution is not less than 4.3, and the conductivity weighted value is not more than 10 μ s/mm;
Smoke density Dm was not more than 100 when (2) material had flame, and smoke density Dm is not more than 200 during nonflame; After the finished cable burning, the unit cable light transmittance is more than 85%, and multiple or multi-beam cable light transmittance is more than 80%;
(3) flue gas toxity of cable meets the ZA2 level;
The concentration of all gases that (4) produces during cable fire and the amount of being fuming (ppm): HCl are 0, CO is 30, NO
2Be 0.061, SO
2Be 0.012;
(5) material not fluorine-containing (F), chlorine (Cl), bromine (Br), iodine halogens such as (I); Content of beary metal (mg/kg) chromium (Cr)≤60, cadmium (Cd)≤75, mercury (Hg)≤60, plumbous (Pb)≤90, antimony (Sb)≤60, arsenic (As)≤25, barium (Ba)≤1000, selenium (Se)≤500;
(6) the cable-flame retardant performance reaches the requirement of I level category-A flame retardant cable;
(7) the cable fire resistance reaches the requirement of I level category-A fire-resisting cable.
The insulation of environment-friendly cable provided by the invention and the performance index of sheath material meet the following requirements.
Silicon rubber insulation material performance requirement: density 1.20g/cm
3, tensile strength>=7.0MPa, elongation at break>=250%, shore hardness 68A, 20 ℃ of specific insulation>=1.0 * 10
18Ω cm, 20 ℃ of dielectric strength>=20kV/mm.
The fire-resistant sheath material performance requirement of expansion type low-smoke halogen-free fire retardant polyolefin: density 1.16g/cm
3, tensile strength>=15.0MPa, elongation at break>=500%, 20 ℃ specific insulation>=3.0 * 10
14Ω cm, 20 ℃ of dielectric strength>=18kV/mm.
Environment-friendly cable provided by the invention can single-core cable, twin core cable, three-core cable, quad or five-core cable.With the quad is example (Fig. 1), and each core of cable is followed successively by the fire-resistant outer jacket of conductor, silicone rubber insulation layer, inserts, fire-retardant oxygen barrier layer, aluminium-plastic tape thermal insulation layer and expansion type low-smoke halogen-free fire retardant polyolefin from the inside to the outside and forms.
For realizing that its key process technology of environment-friendly cable provided by the invention comprises the selection of the member that constitutes cable and the selection of creation technology.The cross section of cable is circular or fan-shaped.
1, constructs the selection of the member of environment-friendly cable
Conductor adopts 1 type or 2 types of twisted copper conductors that meet GB/T 3956 regulations, and conductive surface is bright and clean, no burr, no marking.
Insulating barrier adopts the methyl ethylene silica-gel mixture as insulating material, and the methyl ethylene silica-gel mixture is environment-friendly materials, has good processing properties, mechanical and physical performance and special shelling ability.Silicon rubber insulation progressively decomposes under the high-temp combustion situation; Forming with silicon dioxide at conductive surface is the duricrust inorganic insulator of main body; Shell has than great machinery intensity, can bear certain mechanical impact force, the flame retardant coating of the wrapped formation of similar mica tape; Under the high temperature or the situation of making moist, still have excellent electrical insulation properties, guarantee that cable keeps the operate as normal of a period of time under high-temp combustion.
The halogen-free high flame-retardant band of the wrapped employing plating of stranding hydrate is coated on outside the cable core; Halogen-free high flame-retardant band outward appearance is white two-sided impregnation; This wrapped material is through adopting alkali-free glass fiber cloth; Dip-coating does not contain any halogen, not phosphorous high flame retardant colloid, and through solidifying or crosslinked forming.The novel flame-retardant oxygen barrier layer be can form, cable high flame resistance and environmental protection performance realized.Fill and adopt the inorganic paper string of high flame retardant, guarantee the rounding property and the high flame retardant of product.
Thermal insulation layer adopts aluminium-plastic tape wrapped.Aluminium-plastic tape is used polyethylene with aluminium strip and plastic layer, and both are processed into through adopting the top grade coating material.Well heat insulation, reflecting heat effect that thermal insulation layer plays has slowed down heat conduction.
Oversheath adopts the fire-resistant new material of expansion type low-smoke halogen-free fire retardant polyolefin, and sheath material not only has characteristics such as Halogen, low cigarette, fire-retardant, low toxicity, low corrosion, and performance index meet the requirement of environment-friendly cable, but also have density low, can extrude processing characteristics.Novel sheath material selects for use the APP of high polymerization degree as fire retardant, adopts the chemically expansible flame-retarded technology, its flame-retardant mechanism: under the high-temp combustion condition; Acidifier thermal dehydration in the flame-retardant system is decomposed and is generated acid, and forms carbon-coating as strong dehydrating agent with the charcoal material generation dehydration that becomes in the flame-retardant system, and the porous carbon-coating close attachment that the foaming effect through blowing agent produces densification is in material surface; Thereby play secluding air, the blocking-up burning things which may cause a fire disaster reduces the material surface temperature; Reduce the flue gas traffic volume effect of material combustion; Effectively protected the integrality of cable line, thereby this sheath new material has significant fire resistance, fire resistance is lasting.
2, the selection of manufacturing process
(1) environment-friendly cable manufacturing process:
Each operation of cable adopts green material, rationally influences the material and the structural factor of environmental protection in the control cable.Silicone rubber insulation layer, the wrapped novel oxygen barrier layer of halogen-free high flame-retardant, the wrapped thermal insulation layer of aluminium-plastic tape, the fire-resistant outer jacket of expansion type halogen-free low-smoke flame-proof polyolefin; All select environment-friendly materials for use, pH value, conductivity, light transmittance, smoke density, poisonous gas burst size all meet the performance requirement of ECO under the cable fire situation.
(2) fire-resisting cable structure
The fire resistance of cable product also not exclusively depends on the flame retardant coating of the wrapped formation of mica tape; But depend on the structural design of insulation and fire-resistance property, material component and the whole cable of sheath material; Environment-friendly cable employing silicone rubber insulation layer provided by the invention adds the aluminium-plastic tape thermal insulation layer and adds the fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin; Abandoned traditional fire-resisting cable structure, thereby avoided mica tape quality and around-packing technology the fire-resisting cable Effect on Performance.Silicon rubber insulation has the broad temperature scope of application, under-60 ℃ of-+250 ℃ of temperature, can normally use, even under high-temp combustion, still can form silicon dioxide duricrust inorganic insulator at conductive surface, and electrical insulation properties is very excellent; The wrapped thermal insulation layer of aluminium-plastic tape, aluminium lamination photothermal reflectance rate has been slowed down heat conduction greater than 90%, even under high-temp combustion, the alumina layer that fusion generates can form barrier, effectively stops heat to the polymer internal delivery; The fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin; Under heating or flame interaction; Sheath material expands rapidly, forms at cable surface and not molten drop of fine and close porous carbon-coating close attachment, plays good heat insulation oxygen barrier effect; Can block burning things which may cause a fire disaster effectively, the integrality of protection cable line.
Adopt the fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin to add the aluminium-plastic tape thermal insulation layer and add the silicone rubber insulation layer structure again; Even under 1000 ℃ flame temperature condition; Through behind the 90min, the cable temperature inside is no more than 450 ℃, and cable still can keep the integrality of outer jacket; Isolating internal insulating layer and molten product thereof contacts with external flame; The design of novel flame resistant cable combining structure is finally played the protection insulating barrier and is difficult to burnt, and guarantees that cable keeps the operate as normal of a period of time under high-temp combustion.
The structural design of novel flame resistant cable is particularly useful for the design and the manufacturing of small bore small dimension fire-resisting cable, and fire stability is excellent.Not only reduce wrapped operation, flexibility is good, and is particularly suitable to the occasion that bending radius is less, and compares with traditional fire-resisting cable of same specification, and the external diameter of the fire-resisting cable that is provided is wanted little 1-3mm, has practiced thrift material cost greatly.
(3) novel flame-retardant oxygen barrier layer structure
Traditional oxygen barrier layer cable that extrudes, poor processability is after cable is placed a period of time; The water soluble mixt resin hardens easily, and easy damaged insulating barrier when laying is installed, and all there are many defectives in it at aspects such as structure, characteristic and processing and manufacturings; The present invention adopts the halogen-free high flame-retardant material of plating hydrate to be coated on the fire-retardant oxygen barrier layer of the outer formation of cable core; Integrate fire-retardant, heat absorption, oxygen barrier, and adopt the inorganic paper string of high flame retardant to fill, effectively improved the high flame retardant characteristic of cable.
Fire-retardant oxygen barrier layer fire retardant mechanism: fire-retardant oxygen barrier layer combustion decomposition generates the metal oxide and the crystallization water; Metal oxide can adsorb flue gas after decomposing; The crystallization water can absorb heat and lower temperature, and heat-absorbing action has delayed cable fire speed, the carbonization structure that it forms in combustion process; Form the supply and the mobile oxygen barrier layer of fuel gas that hinder oxygen, thereby suppressed the burning of cable.
(4) the wrapped thermal insulation layer of aluminium-plastic tape is heat insulation, reverberation is technological
After the wrapped fire-retardant oxygen barrier layer of cable core, adopt the wrapped formation thermal insulation layer of aluminium-plastic tape, the photothermal reflectance rate of thermal insulation layer is greater than 90%; Slowed down hot conduction, the fusing point of metallic aluminium is 660 ℃, and melting heat reaches 11670 joules/mole; Thermal insulation layer at high temperature fuses oxidation; Can absorb a large amount of heats, and the alumina layer that generates can form thermodynamic barrier, effectively stop heat to the polymer internal delivery; Delayed the impact of external flame air-flow and heat simultaneously, protected the formation of insulating barrier inorganic insulator preferably insulating barrier.
3, material type selecting
(1) silicon rubber insulation material
Silicon rubber is a kind of synthetic specific rubber, is celebrated with heat-resisting.As cable material, silicon rubber insulation is the macromolecular material of linear structure before baking, has bigger plasticity, and the linear chain shape structure of sulfuration back silicon rubber is cross-linked into network structure, has the elasticity and other excellent specific properties of rubber.Silicon rubber insulation material after the sulfuration has many remarkable advantages: a, has the intrinsic flexibility of rubber; B, have the comparatively broad temperature scope of application, it can normally use under-60 ℃ of-+250 ℃ of temperature; C, have electrical insulation capability preferably, the silicon dioxide inorganic insulator of the white that behind high-temp combustion, generates still plays insulating effect, and arc resistance is better; D, have anti-preferably ozone aging, heat ageing, ultraviolet light and aging and atmospheric aging performance; E, temperature grade height have improved current-carrying capacity of cable.
(2) the fire-resistant sheath new material of expansion type low-smoke halogen-free fire retardant polyolefin
Common low-smoke and halogen-free flame retardant polyolefin jacket material adopts be metal hydroxides as fire retardant, what the fire-resistant sheath material of expansion type low-smoke halogen-free fire retardant polyolefin adopted is the novel flame-retardant technology, utilizes the cooperative flame retardant effect to improve flame retardant effect.The expansion type flame-retarding technology is divided into two types of chemical type and physicals, and what this sheath new material adopted is the chemically expansible flame-retarded technology, and this technology is used as the acid source in the flame-retardant system with phosphorus; During burning between acid source, charcoal source, each component of source of the gas series of chemical takes place; Volume expands rapidly, and forms the porous charcoal layer of complete densification at cable surface, and the porous charcoal layer is heat insulation, oxygen barrier, press down cigarette; And can prevent to produce molten drop, have good flame-retardant smoke inhibition and put out function certainly.The sheath new material possesses suitable expansion temperature-initial bubble temperature about 250 ℃, and can before 460 ℃, reach the maximum swelling volume.Under heating or flame interaction, expanding layer has significant fire resistance and lower thermal conductivity, and fire resistance is lasting.The sheath new material also have density low, can extrude distinct advantages such as processing, compare with other like product and have higher cost performance and competitiveness.
In a word, environment-friendly cable provided by the invention
1. structurally adopt
A) adopt the fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin to add the aluminium-plastic tape thermal insulation layer and add the fire-resisting cable structural design that the silicone rubber insulation layer three is combined to form;
B) the fire-retardant oxygen barrier layer structural design of the halogen-free high flame-retardant material of plating hydrate formation;
C) insulating layer structure of the wrapped formation of aluminium-plastic tape design;
2. on the material type selecting
A) select silicon rubber insulation material heat-resisting, that the shelling ability is superior for use;
B) select the fire-resistant sheath material of expansion type low-smoke halogen-free fire retardant polyolefin fire-resistant, that fire resistance is superior for use;
3. on processing technology
A) silicon rubber insulation extrudes and sulfuration process;
B) extrusion process of the fire-resistant sheath of expansion type low-smoke halogen-free fire-retardant polyolefine.
Therefore, fire-resistant expansion type halogen-free environment protection high flame resistance cable provided by the invention, not only raw and auxiliary material adopts is the environmental protection type material; And the silastic material of insulating barrier employing, temperature resistant grade is high, and soft bending radius is little; The new material density that outer jacket adopts is low, is easy to processing.Whole cable is not because adopt traditional fire-resisting cable structure and extrude the oxygen barrier layer structure, and the approximate external diameter of cable obviously reduces, and construction weight alleviates to some extent.1), not halogen-containing fire-resistant expansion type halogen-free environment protection high flame resistance cable has following distinguishing feature on performance:, can not produce pernicious gas and corrosive gas; The concentration and the amount of being fuming of all gases that produces when 2), burning are low; 3), eight heavy metal species content such as mercury, lead are low, free from environmental pollution; 4), has higher fire resistance; 5), has stable fire resistance; 6), temperature grade is high, improved the ampacity of cable; 7), density is low, is easy to processing; 8), soft bending radius is little; 9), the approximate external diameter of cable is little, lightweight construction.
Description of drawings
The fire-resistant expansion type halogen-free environment protection high flame resistance of Fig. 1 four-core provided by the invention construction of cable sketch map; A is a circular cross-section; B is a sector crosssection.
Among the figure: the 1-conductor; The 2-silicon rubber insulation; 3-fills; The fire-retardant oxygen barrier layer of 4-; 5-aluminium-plastic tape thermal insulation layer; The fire-resistant outer jacket of 6-expansion type low-smoke halogen-free fire retardant polyolefin.
The technological process of Fig. 2 environment-friendly cable provided by the invention.
Embodiment
Further specify substantive distinguishing features of the present invention and obvious improvement below in conjunction with accompanying drawing and technological process, but the present invention only is confined to embodiment by no means.
Be described further according to Fig. 2 technological process below:
(1) single line draws
Φ 8.00mm copper bar stretches through multiple tracks, is drawn into single round copper wire, and drawing process is produced identical with general cable.
(2) annealing process
After single round copper wire draws, annealed crystallization again, the annealing temperature control range is accurate.
(3) conductor is stranded
Conductor is taked regular stranded, guarantees the Stability Analysis of Structures of conductor.The pitch ratio of each stranded layer of appropriate design, the bending property and the compactness of assurance conductor.
(4) silicon rubber insulation
After silicon rubber is extruded, rationally control curing temperature, cure time and sulfide stress, guarantee the insulation full cure.Insulated wire cores adopt colour code, the master core color in each loop be red, yellow, green, the neutral line for blue, earth connection is a Huang/green double-colored.
(5) sparking test
Insulated wire cores should be by the interchange 50Hz sparking test of GB/T3048.9 regulation as intermediate survey.
(6) stranding
The stranding direction is a dextrad, and cable core is pressed red, yellow, green, blue, Huang/green bi-color sequential arranged clockwise, and the cable core rounding is tight.
(7) fire-retardant oxygen barrier layer
Halogen-free high flame-retardant band nominal thickness is not less than 0.20mm, and wrapped four layers, Duplication is not less than 30%, rationally controls wrapped Duplication.
(8) aluminium-plastic tape thermal insulation layer
The aluminium-plastic tape nominal thickness is not less than 0.10mm, wrapped one deck, and the rate of putting up is not less than 40%, rationally controls the wrapped rate of putting up and precision.
(9) the fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin
Outer jacket adopts the fire-resistant new material of expansion type low-smoke halogen-free fire retardant polyolefin, and temperature and speed that control extrudes guarantee that cable surface is smooth, color and luster is even, and plasticizing is good.
(10) spray printing
Spray printing factory name, model, rated voltage, specification, length etc. identify continuously on the outer jacket surface.Every adjacent two complete sign head and the tail spacings are not more than 500mm.
(11) test package
The finished product of extruding hangs up properly label, indicates product type, specification, length and operator, date of manufacture etc., through the reviewer confirm qualified and sign or seal after be placed into the regulation place and neatly put.
What need explanation in above-mentioned each flow process is:
1, cable conductor.Conductor material adopts copper single line or copper stranded conductor.Its structure and performance meet the relevant regulations of GB/T3956.
2, silicone rubber insulation layer.Characteristics such as the more excellent silicon rubber insulation material of employing performance forms through the extrusion molding after cure, guarantees good insulation resistance and electrical insulation properties, has the temperature resistant grade height simultaneously, and heat-resistant aging is good.
3, fill.During the stranded stranding of cable core, adopt inorganic paper string of high flame retardant or high flame retardant polypropylene to fill rope and fill, guarantee the rounding property of cable core.
4, fire-retardant oxygen barrier layer.Behind the stranded stranding of cable core, adopt to apply the novel oxygen barrier layer of the wrapped formation of halogen-free high flame-retardant material of inorganic metal hydrate, fire-retardant oxygen barrier layer surface should be smooth closely, pitch is even.
5, aluminium-plastic tape thermal insulation layer.After the wrapped fire-retardant oxygen barrier layer of cable core, adopt the wrapped formation thermal insulation layer of aluminium-plastic tape, the thermal insulation layer surface should be smooth smooth.
6, the fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin.Outer jacket closely is extruded on the thermal insulation layer, adopts the fire-resistant sheath new material of expansion type low-smoke halogen-free fire retardant polyolefin extrusion molding to form, and smooth rounding is answered on the outer jacket surface, and external diameter is even.
Claims (8)
1. a fire-resistant expanded halogen-free environment protection high flame resistance cable is characterized in that each core of described cable is made up of conductor, silicone rubber insulation layer, inserts, fire-retardant oxygen barrier layer, aluminium-plastic tape thermal insulation layer and the fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin from the inside to the outside successively.
2. by the described cable of claim 1, it is characterized in that described cable is single-core cable, twin core cable, three-core cable, quad or five-core cable.
3. by claim 1 or 2 described cables, it is characterized in that the described cross-section of cable is for circular or fan-shaped.
4. by the described cable of claim 1, it is characterized in that described conductor adopts copper single line or copper stranded conductor, 1 type or 2 types of the regulation of compound GB/T3956.
5. by the described cable of claim 1, it is characterized in that:
1. silicone rubber insulation layer adopts the ethylene methacrylic based mixtures, and high temperature burning down under-60-250 ℃ condition is the shell of main body in conductive surface formation with silicon dioxide;
2. inserts is that inorganic paper string of high flame retardant or high flame retardant polypropylene are filled rope;
3. the nominal thickness of described fire-retardant oxygen barrier layer is not less than 0.20mm;
4. it is wrapped that thermal insulation layer adopts aluminium-plastic tape, and the aluminium lamination photothermal reflectance rate of aluminium-plastic tape is greater than 90%, and nominal thickness is not less than 0.10mm;
5. outer sheath material select high polymerization degree for use APP as fire retardant, adopt chemical flame-retarded technology, under hot conditions, make the one-tenth charcoal material generation dehydration in the flame-retardant system form carbon-coating and be attached to material surface;
6. fire-retardant oxygen barrier layer adopts alkali-free glass fiber cloth, in halogen-containing, the not phosphorous high flame retardant colloid of dip-coating, through solidifying or crosslinked forming.
6. by claim 1 or 2 described cables, it is characterized in that the fire-resisting cable little 2-4mm of the described outside diameter of cable than same specification.
7. by claim 1 or 5 described cables, it is characterized in that the fire-resistant outer jacket initial bubble of described intumescent temperature is 250 ℃, and can before 460 ℃, reach the maximum swelling volume.
8. the method for preparing cable according to claim 1 or claim 2; Comprise that single line drawing, annealing process, conductor are stranded, silicon rubber insulation, stranding, fire-retardant oxygen barrier layer, aluminium-plastic tape thermal insulation layer, 8 steps of the fire-resistant outer jacket of expansion type low-smoke halogen-free fire retardant polyolefin, it is characterized in that:
1. Φ 8.00mm copper bar stretches, is drawn into single round copper wire through multiple tracks;
2. conductor stranded take regular stranded;
3. silicon rubber insulation adopts heatproof-60-250 ℃ silicon rubber extrusion molding after cure, control curing temperature, time and pressure;
4. the stranding direction is a dextrad, red, yellow or green and the neutral line is blue and earth connection is yellow/green bi-color sequential arranged clockwise that cable core is pressed master core;
5. behind the stranded stranding of cable core, adopt the wrapped formation oxygen barrier layer of halogen-free high flame-retardant material that applies the inorganic metal hydrate, nominal thickness is not less than 0.20mm, and wrapped four layers, Duplication is not less than 40%;
6. aluminium-plastic tape thermal insulation layer nominal thickness is not less than 0.10mm, and wrapped 1 layer, the rate of putting up is not less than 40%;
7. fire-retardant oxygen barrier layer is the halogen-free high flame-retardant band, and nominal thickness is not less than 0.20mm, and wrapped 4 layers, Duplication is not less than 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010237154 CN102306513A (en) | 2010-07-27 | 2010-07-27 | Expansion type environment-friendly halogen-free high-flame retardant and fire-resistant cable and method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010237154 CN102306513A (en) | 2010-07-27 | 2010-07-27 | Expansion type environment-friendly halogen-free high-flame retardant and fire-resistant cable and method thereof |
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| Publication Number | Publication Date |
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| CN102306513A true CN102306513A (en) | 2012-01-04 |
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| CN 201010237154 Pending CN102306513A (en) | 2010-07-27 | 2010-07-27 | Expansion type environment-friendly halogen-free high-flame retardant and fire-resistant cable and method thereof |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623093A (en) * | 2012-04-27 | 2012-08-01 | 无锡市群星线缆有限公司 | Special high and low temperature-resistant cable |
| CN102737777A (en) * | 2012-06-13 | 2012-10-17 | 苏州市职业大学 | Three-phase four-wire low-voltage photoelectric composite cable |
| CN102842376A (en) * | 2012-08-27 | 2012-12-26 | 淮南新光神光纤线缆有限公司 | High-temperature fire-resistant insulated cable for ships and warships |
| CN102969069A (en) * | 2012-12-10 | 2013-03-13 | 南洋电缆集团有限公司 | Waterproof greasy-dirt-resisting 10 kV middle-voltage transducer cable and method |
| CN103745775A (en) * | 2013-12-17 | 2014-04-23 | 广西柳州银海铝业股份有限公司 | Heat-insulation and flame-retardant cable |
| CN104112500A (en) * | 2014-07-04 | 2014-10-22 | 安徽华电线缆集团有限公司 | Environment-friendly and safe low-smoke halogen-free flame-retardant fire-resistant control cable |
| CN104392786A (en) * | 2014-11-02 | 2015-03-04 | 国家电网公司 | Fireproof cable |
| CN105225752A (en) * | 2015-09-28 | 2016-01-06 | 安徽贝特电缆科技有限公司 | A kind of high-strength anti-flaming fire proof power cable and preparation method thereof |
| CN106128648A (en) * | 2016-07-21 | 2016-11-16 | 芜湖顺成电子有限公司 | A kind of production technology of low-fume non-bittern flame-retardant electrical wire |
| CN106373643A (en) * | 2016-08-24 | 2017-02-01 | 宁波华众和创工业设计有限公司 | High-insulativity and high-temperature-resistant cable and manufacturing method therefor |
| CN107068277A (en) * | 2017-04-24 | 2017-08-18 | 成都新三电线厂 | Halogen-free and low-smoke flame-retardant polyolefin insulating environment-friendly cable |
| CN107946000A (en) * | 2017-12-12 | 2018-04-20 | 杭州电缆股份有限公司 | The production method of high roundness round conductor lv power cable |
| CN109504091A (en) * | 2018-10-24 | 2019-03-22 | 桂林裕天新材料有限公司 | A kind of low cigarette, flame-retardant silicone rubber rubber compound of high transparency and preparation method thereof |
| CN110010296A (en) * | 2019-04-26 | 2019-07-12 | 金杯电工衡阳电缆有限公司 | A kind of middle pressure flame-retardant fire-resistant power cable containing buffer structure |
| CN110570981A (en) * | 2019-09-23 | 2019-12-13 | 特变电工(德阳)电缆股份有限公司 | Flame-retardant B1-grade cable |
| CN113021826A (en) * | 2021-02-26 | 2021-06-25 | 重庆鸽牌电线电缆有限公司 | Production method of self-extinguishing electric cable |
| CN113363024A (en) * | 2021-06-02 | 2021-09-07 | 广州市广惠通线缆有限公司 | Cable foaming layer nitrogen filling control method and system |
| CN113539553A (en) * | 2021-07-27 | 2021-10-22 | 安徽怡和电缆有限公司 | Novel flexible halogen-free fireproof cable |
| CN114334266A (en) * | 2020-10-10 | 2022-04-12 | 天津首瑞智能电气有限公司 | Cable with improved structure |
| CN114334265A (en) * | 2020-10-10 | 2022-04-12 | 天津首瑞智能电气有限公司 | Cable with improved structure |
| CN115547561A (en) * | 2022-10-18 | 2022-12-30 | 特变电工山东鲁能泰山电缆有限公司 | Multi-tolerance fireproof cable |
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| JP2001256837A (en) * | 2000-03-10 | 2001-09-21 | Fujikura Ltd | Fire-resistant cable |
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Cited By (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102623093A (en) * | 2012-04-27 | 2012-08-01 | 无锡市群星线缆有限公司 | Special high and low temperature-resistant cable |
| CN102737777A (en) * | 2012-06-13 | 2012-10-17 | 苏州市职业大学 | Three-phase four-wire low-voltage photoelectric composite cable |
| CN102842376B (en) * | 2012-08-27 | 2014-07-23 | 淮南新光神光纤线缆有限公司 | High-temperature fire-resistant insulated cable for ships and warships |
| CN102842376A (en) * | 2012-08-27 | 2012-12-26 | 淮南新光神光纤线缆有限公司 | High-temperature fire-resistant insulated cable for ships and warships |
| CN102969069B (en) * | 2012-12-10 | 2016-06-29 | 南洋电缆集团有限公司 | The 10kV kV middle-voltage transducer cable of a kind of waterproof greasy-dirt-resistin10 and method |
| CN102969069A (en) * | 2012-12-10 | 2013-03-13 | 南洋电缆集团有限公司 | Waterproof greasy-dirt-resisting 10 kV middle-voltage transducer cable and method |
| CN103745775A (en) * | 2013-12-17 | 2014-04-23 | 广西柳州银海铝业股份有限公司 | Heat-insulation and flame-retardant cable |
| CN104112500A (en) * | 2014-07-04 | 2014-10-22 | 安徽华电线缆集团有限公司 | Environment-friendly and safe low-smoke halogen-free flame-retardant fire-resistant control cable |
| CN104392786A (en) * | 2014-11-02 | 2015-03-04 | 国家电网公司 | Fireproof cable |
| CN105225752A (en) * | 2015-09-28 | 2016-01-06 | 安徽贝特电缆科技有限公司 | A kind of high-strength anti-flaming fire proof power cable and preparation method thereof |
| CN106128648A (en) * | 2016-07-21 | 2016-11-16 | 芜湖顺成电子有限公司 | A kind of production technology of low-fume non-bittern flame-retardant electrical wire |
| CN106373643A (en) * | 2016-08-24 | 2017-02-01 | 宁波华众和创工业设计有限公司 | High-insulativity and high-temperature-resistant cable and manufacturing method therefor |
| CN106373643B (en) * | 2016-08-24 | 2017-11-28 | 宁波华众和创工业设计有限公司 | A kind of high-insulativity high-temperature cable and its manufacture method |
| CN107068277A (en) * | 2017-04-24 | 2017-08-18 | 成都新三电线厂 | Halogen-free and low-smoke flame-retardant polyolefin insulating environment-friendly cable |
| CN107946000A (en) * | 2017-12-12 | 2018-04-20 | 杭州电缆股份有限公司 | The production method of high roundness round conductor lv power cable |
| CN109504091A (en) * | 2018-10-24 | 2019-03-22 | 桂林裕天新材料有限公司 | A kind of low cigarette, flame-retardant silicone rubber rubber compound of high transparency and preparation method thereof |
| CN110010296A (en) * | 2019-04-26 | 2019-07-12 | 金杯电工衡阳电缆有限公司 | A kind of middle pressure flame-retardant fire-resistant power cable containing buffer structure |
| CN110570981A (en) * | 2019-09-23 | 2019-12-13 | 特变电工(德阳)电缆股份有限公司 | Flame-retardant B1-grade cable |
| CN114334266A (en) * | 2020-10-10 | 2022-04-12 | 天津首瑞智能电气有限公司 | Cable with improved structure |
| WO2022073521A1 (en) * | 2020-10-10 | 2022-04-14 | 天津首瑞智能电气有限公司 | Cable |
| CN114334265A (en) * | 2020-10-10 | 2022-04-12 | 天津首瑞智能电气有限公司 | Cable with improved structure |
| CN113021826A (en) * | 2021-02-26 | 2021-06-25 | 重庆鸽牌电线电缆有限公司 | Production method of self-extinguishing electric cable |
| CN113021826B (en) * | 2021-02-26 | 2022-12-27 | 重庆鸽牌电线电缆有限公司 | Production method of self-extinguishing electric cable |
| CN113363024B (en) * | 2021-06-02 | 2021-11-16 | 广州市广惠通线缆有限公司 | Cable foaming layer nitrogen filling control method and system |
| CN113363024A (en) * | 2021-06-02 | 2021-09-07 | 广州市广惠通线缆有限公司 | Cable foaming layer nitrogen filling control method and system |
| CN113539553A (en) * | 2021-07-27 | 2021-10-22 | 安徽怡和电缆有限公司 | Novel flexible halogen-free fireproof cable |
| CN115547561A (en) * | 2022-10-18 | 2022-12-30 | 特变电工山东鲁能泰山电缆有限公司 | Multi-tolerance fireproof cable |
| CN117430903A (en) * | 2022-10-18 | 2024-01-23 | 特变电工山东鲁能泰山电缆有限公司 | Composite protective layer and cable |
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Application publication date: 20120104 |