CN105139947A - Flame-retardant signal cable and manufacturing method thereof - Google Patents
Flame-retardant signal cable and manufacturing method thereof Download PDFInfo
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Abstract
The invention discloses a flame-retardant signal cable and a manufacturing method thereof. The cable includes a plurality of cable inner cores, and a third ceramic fiber fire-resistant tape, a second metal shielding layer, a second silicone rubber composite material flame-retardant layer, a nanometer flame-retardant insulating layer and a flame-retardant outer sheath which wrap the plurality of cable inner cores in sequence. Each cable inner core includes a second ceramic fiber fire-resistant tape, a plurality of conductor core groups arranged inside the second ceramic fiber fire-resistant tape, an insulating shielding layer and a first metal shielding layer which wrap the second ceramic fiber fire-resistant tape in sequence, and a first ceramic fiber fire-resistant tape and a first silicone rubber composite material flame-retardant layer which wrap each conductor core group in sequence. A fire resistance test for the cable proves that the cable not only satisfies requirements of National Standard GB/T19216, but also satisfies requirements of class C, class W and class Z as specified in British Standard BS6387; and in the test process, neither a short circuit nor an open circuit occurs in the cable.
Description
Technical field
The present invention relates to a kind of Computer signal data cable, specifically a kind of flame retardant type signal cable and preparation method thereof.
Background technology
Wires and cables industry product category is numerous, and range of application is very extensive, relates to the industries such as electric power, petrochemical industry, communication, manufacture, all closely related with each department of national economy.RS cable is called as " artery " and " nerve " of national economy, is transmission of information and various signal, and realizing the indispensable basic equipment of electromagnetic energy conversion, is basic product necessary in Future Information society.Especially the fast-developing Chinese Home as China, the huge demand that capital construction and auxiliary facility are built is self-evident.
Computer and computer or the data transmission between computer and terminal can adopt serial communication and parallel communication two kinds of modes.Because serial communication mode has, use circuit is few, cost is low, particularly when remote transmission, avoids the inconsistent of many line characteristics and is widely adopted.When serial communication, require that communication two party all adopts a standard interface, different equipment can be coupled together easily and carry out communication.The RS-232 interface of early application also exists more deficiency, not enough for these, so just constantly there is some new interface standards, RS-485 is exactly one of them.
Refer to Fig. 1, a kind of RS-485 Computer signal data cable conventional at present, comprises three cable inner cores 1, and three cable inner cores 1 outer coated successively internal shield 2, outer shielding layer 3 and sheaths 4; Three cable inner cores 1 are symmetrically set, and each cable inner core 1 includes two conductor cores groups 11 of lapping layer 13, lapping layer 13 inside, and the insulating barrier 12 of each conductor cores group 11 outer cladding; And each conductor cores group 11 is made up of several conductor strand respectively.General conductor is tin-coated copper core; Insulating barrier 12 and lapping layer 13 adopt high density polyethylene (HDPE) to foam or foam fluoroethylene-propylene material is made; Internal shield 2 adopts Aluminium moulding material to be composited; Outer shielding layer 3 adopts tinned copper wire to weave and forms; Sheath 4 adopts polyvinyl chloride or foam fluoroethylene-propylene material to make.
This RS-485 Computer signal data cable has following characteristics:
(1) electrical characteristic of RS-485: logical one with the voltage difference of line-to-line for+(2-6) V represents; Logical zero is that one (2-6) V represents with the voltage difference of line-to-line.Interface signal level reduces than RS-232, just the chip of not fragile interface circuit, and this level and Transistor-Transistor Logic level compatibility, can conveniently be connected with TTL circuit;
(2) the data maximum transmission rate of RS-485 is lOMbps;
(3) RS-485 interface is the combination adopting balance driver and differential receiver, and anti-common mode disturbances ability strengthens, and namely noise immunity is good;
(4) the maximum transmission distance standard value of RS-485 interface is 4000 feet, in fact can reach 3000 meters, and RS-232 interface only allows connection 1 transceiver in bus in addition, ability of namely singly standing.And RS-485 interface is allow to connect nearly 128 transceivers in bus.Namely have multistation ability, such user can utilize single RS-485 interface to set up device network easily;
Because RS-485 interface has good noise immunity, the above-mentioned advantages such as long transmission range and multistation ability, become first-selected serial line interface.But as can be seen from the material of RS-485 Computer signal data cable, its fire resistance is very poor; And along with fire occur in the increase year by year of electrical fire incidence, therefore increasingly urgent to electric wire fire protection requirement.At present, Electrical Safety is global problem, particularly when fire incident occurs, how to leave the sufficient time ensure people safe escape, minimizing accident loss, ensure that line security energising, signal are unimpeded, how improving the fire safety grade of key project, important place, special dimension etc., is the diligent pursuit of cable industry research staff.
Summary of the invention
The object of the present invention is to provide a kind of flame retardant type signal cable and preparation method thereof, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of flame retardant type signal cable, comprises multiple cable inner core, and multiple cable inner core outer coated successively the 3rd ceramic fibre fire resistant belt, the second metal screen layer, the second silicon rubber composite material flame-retardant layer, nano flame retardant insulating barrier and fire-retardant oversheath; Multiple cable inner core is symmetrically set, each cable inner core includes the second ceramic fibre fire resistant belt, the second ceramic fibre fire resistant belt inside is arranged multiple conductor cores groups, the outside insulation screen coated successively of the second ceramic fibre fire resistant belt and the first metal screen layer, and each conductor cores group the first coated successively ceramic fibre fire resistant belt and the first silicon rubber composite material flame-retardant layer outward; Between the first silicon rubber composite material flame-retardant layer and the second ceramic fibre fire resistant belt, be filled with the first flame-retardant filler, at multiple cable inner core each other, and cable inner core and the 3rd ceramic fibre fire resistant belt are all filled with the second flame-retardant filler;
Described first silicon rubber composite material flame-retardant layer is identical with the material of the second silicon rubber composite material flame-retardant layer, and according to the component of weight portion is: organic silicon rubber waste material 30-60 part, ammonium polyphosphate 20-30 part, melamine 10-20 part, pentaerythrite 20-30 part, nano-silicon nitride 10-20 part, nano silicon oxide 5-10 part, carbon nano-tube 5-10 part, polymer phosphate iron 2-8 part, silane coupler 2-8 part;
Described nano flame retardant insulating barrier according to the component of weight portion is: water-borne acrylic resin 50-150 part, nanometer nitrogen-phosphorus expansion fire retardant 2-10 part, nm-class boron nitride 2-10 part, carbon nano-tube 2-10 part, nano mesoporous molecular screen 2-10 part, promoter 3-8 part, plasticizer 0.5-1.5 part, age resistor 1-4 part;
Described first flame-retardant filler according to the component of weight portion is: mica powder 150-250 part, ethylene-vinyl acetate copolymer 100-200 part, polyether modified silicon oil 50-100 part, carbon nano-tube 30-50 part, micron order mullite powder 15-25 part, micron order convex Attapulgite 15-25 part, butyl titanate 2-6 part.
As the further scheme of the present invention: described first silicon rubber composite material flame-retardant layer and/or the second silicon rubber composite material flame-retardant layer, according to the component of weight portion be: organic silicon rubber waste material 40-50 part, ammonium polyphosphate 24-26 part, melamine 14-16 part, pentaerythrite 24-26 part, nano-silicon nitride 14-16 part, nano silicon oxide 7-8 part, carbon nano-tube 7-8 part, polymer phosphate iron 4-6 part, silane coupler 4-6 part.
As the further scheme of the present invention: described nano flame retardant insulating barrier according to the component of weight portion is: water-borne acrylic resin 80-120 part, nanometer nitrogen-phosphorus expansion fire retardant 5-7 part, nm-class boron nitride 5-7 part, carbon nano-tube 5-7 part, nano mesoporous molecular screen 5-7 part, promoter 4-6 part, plasticizer 0.8-1.2 part, age resistor 2-3 part.
As the further scheme of the present invention: described first flame-retardant filler according to the component of weight portion is: mica powder 180-220 part, ethylene-vinyl acetate copolymer 140-160 part, polyether modified silicon oil 70-80 part, carbon nano-tube 35-45 part, micron order mullite powder 18-22 part, micron order convex Attapulgite 18-22 part, butyl titanate 3-5 part.
As the further scheme of the present invention: described first ceramic fibre fire resistant belt, the second ceramic fibre fire resistant belt and the 3rd ceramic fibre fire resistant belt are bonded by one deck pottery silica gel and layer of glass, thickness is 0.2-0.5mm, adjacent layer adopts two-way wrapped mode, every ply place apart windings.
As the further scheme of the present invention: described first metal screen layer and the second metal screen layer form by many metal knitted silk braidings, and described metal knitted silk is bare copper wire or tinned copper wire, diameter 0.15-0.2mm, and count is 80%-90%.
As the further scheme of the present invention: described fire-retardant oversheath adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
As the further scheme of the present invention: described second flame-retardant filler is the compound potter's clay of easy-sintering.
A manufacture method for flame retardant type signal cable, concrete steps are:
(1) several conductor strand is adopted to become a conductor cores group, then at the outer wrapped first ceramic fibre fire resistant belt of conductor cores group, then at the outer coated first silicon rubber composite material flame-retardant layer of extrusion molding of the first ceramic fibre fire resistant belt; Namely single insulated electric conductor core group is obtained;
(2) several insulated electric conductor core group is plied to first total cable, and with expressing technique coated first flame-retardant filler outside first total cable, then adopt around-packing technology at the outer wrapped second ceramic fibre fire resistant belt successively of the first flame-retardant filler, then at the outer extrusion molding coated insulation screen of the second ceramic fibre fire resistant belt, weave the first metal screen layer outward at insulation screen again, namely obtain unit cable inner core;
(3) several cables inner core group is plied to second total cable, and with expressing technique coated second flame-retardant filler outside second total cable, then adopt around-packing technology at the outer wrapped 3rd ceramic fibre fire resistant belt successively of the second flame-retardant filler, then weave the second metal screen layer outward at the 3rd ceramic fibre fire resistant belt;
(4) three-layer co-extruded technique is adopted, coated second silicon rubber composite material flame-retardant layer, nano flame retardant insulating barrier and fire-retardant oversheath successively from inside to outside in the outside of the second metal screen layer.
Compared with prior art, the invention has the beneficial effects as follows:
The fire resistance test of the flame retardant type signal cable of the present invention's design not only meets the requirement of GB GB/T19216, and apply 1000V voltage between the conductors, be the 3h that burns in the flame of 950-1000 DEG C in flame temperature, cable neither short circuit is not also opened a way.Also can meet the requirement of A level, B level and the C level specified in Britain BS6387 standard, meanwhile, in burning, also can tolerate Water spray (W level) impact (X level, Y level, Z level) with resistance to mechanical; In process of the test, cable neither short circuit is not also opened a way.
The fire-retardant category-A of this cable fulfils, be fire-retardant highest level, namely anti-flammability in order to extinguish, reducing or suppress the burning of material, adds fire retardant usually in the material, makes material have the performance stoping or delay propagation of flame when burning.When burning things which may cause a fire disaster disappears outside, through can certainly put out after a while.For reaching fire-retardant category-A requirement, in structural design, adopting wrapped ceramic fibre fire resistant belt, extruding silicon rubber composite material flame-retardant layer, filling flame-retardant filler, and adopting nano flame retardant insulating barrier and fire-retardant oversheath to carry out protecting etc. to realize; Adopt extrusion cladding and wrapped technique of intersecting, the comprehensive mechanical of product is formed and significantly improves.
Accompanying drawing explanation
Fig. 1 is the profile of RS-485 Computer signal data cable.
Fig. 2 is the profile of flame retardant type signal cable.
In figure: 1-cable inner core, 2-internal shield, 3-outer shielding layer, 4-sheath, 5-the 3rd ceramic fibre fire resistant belt, 6-second metal screen layer, 7-second silicon rubber composite material flame-retardant layer, 8-nano flame retardant insulating barrier, the fire-retardant oversheath of 9-, 10-second flame-retardant filler, 11-conductor cores group, 12-insulating barrier, 13-lapping layer, 14-first ceramic fibre fire resistant belt, 15-first silicon rubber composite material flame-retardant layer, 16-second ceramic fibre fire resistant belt, 17-insulation screen, 18-first metal screen layer, 19-first flame-retardant filler.
Embodiment
Be described in more detail below in conjunction with the technical scheme of embodiment to this patent.
Refer to Fig. 2, a kind of flame retardant type signal cable, comprise multiple cable inner core 1, and multiple cable inner core 1 outer coated successively the 3rd ceramic fibre fire resistant belt 5, second metal screen layer 6, second silicon rubber composite material flame-retardant layer 7, nano flame retardant insulating barrier 8 and fire-retardant oversheath 9; Multiple cable inner core 1 is symmetrically set, each cable inner core 1 includes inner multiple conductor cores groups 11, second ceramic fibre fire resistant belt 16 outside arranged of the second ceramic fibre fire resistant belt 16, second ceramic fibre fire resistant belt 16 insulation screen 17 coated successively and the first metal screen layer 18, and outer the first coated successively ceramic fibre fire resistant belt 14 and the first silicon rubber composite material flame-retardant layer 15 of each conductor cores group 11; The first flame-retardant filler 19 is filled with between the first silicon rubber composite material flame-retardant layer 15 and the second ceramic fibre fire resistant belt 16, at multiple cable inner core 1 each other, and cable inner core 1 and the 3rd ceramic fibre fire resistant belt 5 be all filled with the second flame-retardant filler 10.
In the present invention, described first silicon rubber composite material flame-retardant layer 15 is identical with the material of the second silicon rubber composite material flame-retardant layer 7, and according to the component of weight portion is: organic silicon rubber waste material 30-60 part, ammonium polyphosphate 20-30 part, melamine 10-20 part, pentaerythrite 20-30 part, nano-silicon nitride 10-20 part, nano silicon oxide 5-10 part, carbon nano-tube 5-10 part, polymer phosphate iron 2-8, silane coupler 2-8 part.
As preferably, described first silicon rubber composite material flame-retardant layer 15 and/or the second silicon rubber composite material flame-retardant layer 7, according to the component of weight portion is: organic silicon rubber waste material 40-50 part, ammonium polyphosphate 24-26 part, melamine 14-16 part, pentaerythrite 24-26 part, nano-silicon nitride 14-16 part, nano silicon oxide 7-8 part, carbon nano-tube 7-8 part, polymer phosphate iron 4-6 part, silane coupler 4-6 part.
In the present invention, described first ceramic fibre fire resistant belt 14, second ceramic fibre fire resistant belt 16 and the 3rd ceramic fibre fire resistant belt 5 are bonded by one deck pottery silica gel and layer of glass, thickness is 0.2-0.5mm, and adjacent layer adopts two-way wrapped mode, every ply place apart windings.This material-70 DEG C-210 DEG C time softness, flexible, intensity is high, mechanicalness insulating properties is excellent.Make cable have the features such as softness, sound insulation, shock resistance, construction is laid convenient.
In the present invention, described first metal screen layer 18 and the second metal screen layer 6 form by many metal knitted silk braidings, and described metal knitted silk is bare copper wire or tinned copper wire, diameter 0.15-0.2mm, and count is 80%-90%.
In the present invention, described first flame-retardant filler 19 according to the component of weight portion is: mica powder 150-250 part, ethylene-vinyl acetate copolymer 100-200 part, polyether modified silicon oil 50-100 part, carbon nano-tube 30-50 part, micron order mullite powder 15-25 part, micron order convex Attapulgite 15-25 part, butyl titanate 2-6 part.
As preferably, described first flame-retardant filler 19 according to the component of weight portion is: mica powder 180-220 part, ethylene-vinyl acetate copolymer 140-160 part, polyether modified silicon oil 70-80 part, carbon nano-tube 35-45 part, micron order mullite powder 18-22 part, micron order convex Attapulgite 18-22 part, butyl titanate 3-5 part.
In the present invention, described nano flame retardant insulating barrier 8 according to the component of weight portion is: water-borne acrylic resin 50-150 part, nanometer nitrogen-phosphorus expansion fire retardant 2-10 part, nm-class boron nitride 2-10 part, carbon nano-tube 2-10 part, nano mesoporous molecular screen 2-10 part, promoter 3-8 part, plasticizer 0.5-1.5 part, age resistor 1-4 part.
As preferably, described nano flame retardant insulating barrier 8 according to the component of weight portion is: water-borne acrylic resin 80-120 part, nanometer nitrogen-phosphorus expansion fire retardant 5-7 part, nm-class boron nitride 5-7 part, carbon nano-tube 5-7 part, nano mesoporous molecular screen 5-7 part, promoter 4-6 part, plasticizer 0.8-1.2 part, age resistor 2-3 part.
In the present invention, described fire-retardant oversheath 9 adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
In the present invention, described second flame-retardant filler 10 is the compound potter's clay of easy-sintering; This compound potter's clay keeps soft loose powder shape at normal temperatures, ensure that finished cable in use flexible, the wrapped outside at the second flame-retardant filler 10 of 3rd ceramic fibre fire resistant belt 5,3rd ceramic fibre fire resistant belt 5 has fire insulation and fire-retardant performance, and the compound potter's clay at normal temperatures in powder ball shape can be wrapped by it; And when running into fire, compound potter's clay can be formed has heat insulation, fireproof earthenware, cable inner core 1 can be worked safely in porcelain tube, thus cable is met to bear under load 1000V condition of work the burning of 950 DEG C, 3 hours, there is anti-spray simultaneously, function that resistance to mechanical is clashed into.
A manufacture method for flame retardant type signal cable, concrete steps are:
(1) several conductor strand is adopted to become a conductor cores group 11, then at the outer wrapped first ceramic fibre fire resistant belt 14 of conductor cores group 11, then at the coated first silicon rubber composite material flame-retardant layer 15 of the outer extrusion molding of the first ceramic fibre fire resistant belt 14; Namely single insulated electric conductor core group is obtained;
(2) several insulated electric conductor core group is plied to first total cable, and with expressing technique coated first flame-retardant filler 19 outside first total cable, then adopt around-packing technology at the outer wrapped second ceramic fibre fire resistant belt 16 successively of the first flame-retardant filler 19, then at the second ceramic fibre fire resistant belt 16 outer extrusion molding coated insulation screen 17, again at the outer braiding of insulation screen 17 first metal screen layer 18, namely obtain unit cable inner core 1;
(3) several cables inner core 1 group is plied to second total cable, and with expressing technique coated second flame-retardant filler 10 outside second total cable, then adopt around-packing technology at the outer wrapped 3rd ceramic fibre fire resistant belt 5 successively of the second flame-retardant filler 10, then at the outer braiding of the 3rd ceramic fibre fire resistant belt 5 second metal screen layer 6;
(4) three-layer co-extruded technique is adopted, coated second silicon rubber composite material flame-retardant layer 7, nano flame retardant insulating barrier 8 and fire-retardant oversheath 9 successively from inside to outside in the outside of the second metal screen layer 6.
The flame retardant type signal cable of the present invention's design, utilizes homemade multiple high-performance flame-retardant material as flame-retardant layer; It has prevent fires completely, flame retardant rating is high, overload protection ability is strong, working temperature is high, rated voltage can reach 1000V, anticorrosion, good bending property, long service life, can greatly length continuous seepage, lay the advantage such as flexibly and easily.
The examining report this product being carried out to special experiment is taken passages as follows:
| Sequence number | Britain BS6387 standard | Standard-required | Result |
| 1 | A level | 650 DEG C by after fiery 3h, circuit keeps complete | Qualified |
| 2 | X level | 650 DEG C by fire, after mechanical shock 15min, circuit keeps complete | Qualified |
| 3 | B level | 750 DEG C by after fiery 3h, circuit keeps complete | Qualified |
| 4 | Y level | 750 DEG C by fire, after mechanical shock 15min, circuit keeps complete | Qualified |
| 5 | C level | 950 DEG C by after fiery 3h, circuit keeps complete | Qualified |
| 6 | Z level | 950 DEG C by fire, after mechanical shock 15min, circuit keeps complete | Qualified |
| 7 | W level | 650 DEG C by after fiery 15min, Water spray 15min, circuit keeps complete | Qualified |
The examining report this product being carried out to type approval test is taken passages as follows:
Visible, the fire resistance test of the flame retardant type signal cable of the present invention's design not only meets the requirement of GB GB/T19216, and apply 1000V voltage between the conductors, be the 3h that burns in the flame of 950-1000 DEG C in flame temperature, cable neither short circuit is not also opened a way.Also can meet the requirement of A level, B level and the C level specified in Britain BS6387 standard, meanwhile, in burning, also can tolerate Water spray (W level) impact (X level, Y level, Z level) with resistance to mechanical; In process of the test, cable neither short circuit is not also opened a way.
The fire-retardant category-A of this cable fulfils, be fire-retardant highest level, namely anti-flammability in order to extinguish, reducing or suppress the burning of material, adds fire retardant usually in the material, makes material have the performance stoping or delay propagation of flame when burning.When burning things which may cause a fire disaster disappears outside, through can certainly put out after a while.For reaching fire-retardant category-A requirement, in structural design, adopting wrapped ceramic fibre fire resistant belt, extruding silicon rubber composite material flame-retardant layer, filling flame-retardant filler, and adopting nano flame retardant insulating barrier and fire-retardant oversheath to carry out protecting etc. to realize; Adopt extrusion cladding and wrapped technique of intersecting, the comprehensive mechanical of product is formed and significantly improves.
Above the better embodiment of this patent is explained in detail, but this patent is not limited to above-mentioned execution mode, in the ken that one skilled in the relevant art possesses, can also makes a variety of changes under the prerequisite not departing from this patent aim.
Claims (9)
1. a flame retardant type signal cable, it is characterized in that, comprise multiple cable inner core, and multiple cable inner core outer coated successively the 3rd ceramic fibre fire resistant belt, the second metal screen layer, the second silicon rubber composite material flame-retardant layer, nano flame retardant insulating barrier and fire-retardant oversheath; Multiple cable inner core is symmetrically set, each cable inner core includes the second ceramic fibre fire resistant belt, the second ceramic fibre fire resistant belt inside is arranged multiple conductor cores groups, the outside insulation screen coated successively of the second ceramic fibre fire resistant belt and the first metal screen layer, and each conductor cores group the first coated successively ceramic fibre fire resistant belt and the first silicon rubber composite material flame-retardant layer outward; Between the first silicon rubber composite material flame-retardant layer and the second ceramic fibre fire resistant belt, be filled with the first flame-retardant filler, at multiple cable inner core each other, and cable inner core and the 3rd ceramic fibre fire resistant belt are all filled with the second flame-retardant filler;
Described first silicon rubber composite material flame-retardant layer is identical with the material of the second silicon rubber composite material flame-retardant layer, and according to the component of weight portion is: organic silicon rubber waste material 30-60 part, ammonium polyphosphate 20-30 part, melamine 10-20 part, pentaerythrite 20-30 part, nano-silicon nitride 10-20 part, nano silicon oxide 5-10 part, carbon nano-tube 5-10 part, polymer phosphate iron 2-8 part, silane coupler 2-8 part;
Described nano flame retardant insulating barrier according to the component of weight portion is: water-borne acrylic resin 50-150 part, nanometer nitrogen-phosphorus expansion fire retardant 2-10 part, nm-class boron nitride 2-10 part, carbon nano-tube 2-10 part, nano mesoporous molecular screen 2-10 part, promoter 3-8 part, plasticizer 0.5-1.5 part, age resistor 1-4 part;
Described first flame-retardant filler according to the component of weight portion is: mica powder 150-250 part, ethylene-vinyl acetate copolymer 100-200 part, polyether modified silicon oil 50-100 part, carbon nano-tube 30-50 part, micron order mullite powder 15-25 part, micron order convex Attapulgite 15-25 part, butyl titanate 2-6 part.
2. flame retardant type signal cable according to claim 1, it is characterized in that, described first silicon rubber composite material flame-retardant layer and/or the second silicon rubber composite material flame-retardant layer, according to the component of weight portion be: organic silicon rubber waste material 40-50 part, ammonium polyphosphate 24-26 part, melamine 14-16 part, pentaerythrite 24-26 part, nano-silicon nitride 14-16 part, nano silicon oxide 7-8 part, carbon nano-tube 7-8 part, polymer phosphate iron 4-6 part, silane coupler 4-6 part.
3. flame retardant type signal cable according to claim 1, it is characterized in that, described nano flame retardant insulating barrier according to the component of weight portion is: water-borne acrylic resin 80-120 part, nanometer nitrogen-phosphorus expansion fire retardant 5-7 part, nm-class boron nitride 5-7 part, carbon nano-tube 5-7 part, nano mesoporous molecular screen 5-7 part, promoter 4-6 part, plasticizer 0.8-1.2 part, age resistor 2-3 part.
4. flame retardant type signal cable according to claim 1, it is characterized in that, described first flame-retardant filler according to the component of weight portion is: mica powder 180-220 part, ethylene-vinyl acetate copolymer 140-160 part, polyether modified silicon oil 70-80 part, carbon nano-tube 35-45 part, micron order mullite powder 18-22 part, micron order convex Attapulgite 18-22 part, butyl titanate 3-5 part.
5. according to the flame retardant type signal cable one of claim 1-4 Suo Shu, it is characterized in that, described first ceramic fibre fire resistant belt, the second ceramic fibre fire resistant belt and the 3rd ceramic fibre fire resistant belt are bonded by one deck pottery silica gel and layer of glass, thickness is 0.2-0.5mm, adjacent layer adopts two-way wrapped mode, every ply place apart windings.
6. according to the flame retardant type signal cable one of claim 1-4 Suo Shu, it is characterized in that, described first metal screen layer and the second metal screen layer form by many metal knitted silk braidings, described metal knitted silk is bare copper wire or tinned copper wire, diameter 0.15-0.2mm, count is 80%-90%.
7. according to the flame retardant type signal cable one of claim 1-4 Suo Shu, it is characterized in that, described fire-retardant oversheath adopts low-smoke non-halogen flame-retardant high-strength abrasion-proof elastomer to make.
8. according to the flame retardant type signal cable one of claim 1-4 Suo Shu, it is characterized in that, described second flame-retardant filler is compound potter's clay.
9. a manufacture method for the flame retardant type signal cable as described in one of claim 1-8, concrete steps are:
(1) several conductor strand is adopted to become a conductor cores group, then at the outer wrapped first ceramic fibre fire resistant belt of conductor cores group, then at the outer coated first silicon rubber composite material flame-retardant layer of extrusion molding of the first ceramic fibre fire resistant belt; Namely single insulated electric conductor core group is obtained;
(2) several insulated electric conductor core group is plied to first total cable, and with expressing technique coated first flame-retardant filler outside first total cable, then adopt around-packing technology at the outer wrapped second ceramic fibre fire resistant belt successively of the first flame-retardant filler, then at the outer extrusion molding coated insulation screen of the second ceramic fibre fire resistant belt, weave the first metal screen layer outward at insulation screen again, namely obtain unit cable inner core;
(3) several cables inner core group is plied to second total cable, and with expressing technique coated second flame-retardant filler outside second total cable, then adopt around-packing technology at the outer wrapped 3rd ceramic fibre fire resistant belt successively of the second flame-retardant filler, then weave the second metal screen layer outward at the 3rd ceramic fibre fire resistant belt;
(4) three-layer co-extruded technique is adopted, coated second silicon rubber composite material flame-retardant layer, nano flame retardant insulating barrier and fire-retardant oversheath successively from inside to outside in the outside of the second metal screen layer.
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Application publication date: 20151209 |