CN106876001A - A kind of Double-layer flame-retardant humidity environmental communication cable and its production technology - Google Patents
A kind of Double-layer flame-retardant humidity environmental communication cable and its production technology Download PDFInfo
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- CN106876001A CN106876001A CN201710269470.1A CN201710269470A CN106876001A CN 106876001 A CN106876001 A CN 106876001A CN 201710269470 A CN201710269470 A CN 201710269470A CN 106876001 A CN106876001 A CN 106876001A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/026—Alloys based on copper
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/02—Stranding-up
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/10—Insulating conductors or cables by longitudinal lapping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
- H01B5/08—Several wires or the like stranded in the form of a rope
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/28—Protection against damage caused by moisture, corrosion, chemical attack or weather
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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Abstract
The present invention relates to a kind of Double-layer flame-retardant humidity environmental communication cable and its production technology, belong to technical field of communication cables.Technical scheme is：Tin plating soft copper conductor is constituted by 19 synnema strands are stranded again（1）, one, center synnema strand, the stranded 6 synnema strands of internal layer, internal layer direction of lay dextrad, the stranded 12 synnema strands of outer layer, outer layer direction of lay left-hand；Tin plating soft copper conductor（1）Outer wrap high temperature resistant GRPP bands（2）, in high temperature resistant GRPP bands（2）Outside extrudes low smoke halogen-free flame-retardant polyolefin insulation（3）, low smoke halogen-free flame-retardant polyolefin insulation（3）Outside is the braiding cotton layer of cotton thread braiding（4）, weave cotton layer and be provided with fire-retardant lacquer coat（5）.The present invention constitutes Double-layer flame-retardant structure using low smoke halogen-free flame-retardant polyolefin insulation and flame retardant paint, flame retardant paint also acts as damp-proof function simultaneously, the effect of Double-layer flame-retardant preferably, while the outside diameter of cable can be reduced, meets the good machinery of communication cable, physical property requirements.
Description
Technical field
The present invention relates to a kind of Double-layer flame-retardant humidity environmental communication cable and its production technology, belong to communication cable technology
Field.
Background technology
Communication cable use occasion is complicated, especially strict to the requirement of cable performance.The mechanical property bag of communication cable
Include bending property, anti-tensile, resistance to compression, antivibration, shock resistance and the performance such as wear-resisting.Physical property include size, weight, it is fire-retardant, heat-resisting,
Cold-resistant, resistance to day light aging, corrosion-resistant, moisture proof, Defend salt fog, mould proof etc..Communication cable will have good mechanical, physical
Can, various mechanical stresses can be born, and electrical property does not deteriorate in the presence of a harsh environment, so that ensure to work stably in a long term, but,
The communication cable of prior art is difficult to meet above-mentioned requirements.
The content of the invention
The present invention is to provide a kind of Double-layer flame-retardant humidity environmental communication cable and its production technology, is hindered using low smoke and zero halogen
Combustion polyolefin insulation constitutes Double-layer flame-retardant structure with flame retardant paint, and flame retardant paint also acts as damp-proof function simultaneously, Double-layer flame-retardant
Effect preferably, while the outside diameter of cable can be reduced, whole cable material all uses environment-friendly materials, meets communication cable good
Machinery, physical property requirements, solve the above mentioned problem that background technology is present.
The technical scheme is that：
A kind of Double-layer flame-retardant humidity environmental communication cable, comprising tin plating soft copper conductor, high temperature resistant GRPP bands, low-smoke non-halogen flame-retardant
Polyolefin insulation, braiding cotton layer and fire-retardant lacquer coat, the tin plating soft copper conductor, by 47 tinned copper wires of diameter 0.50mm
Stranded composition synnema strand, direction of lay is left-hand；Tin plating soft copper conductor, one, center are constituted by 19 synnema strands are stranded again
Synnema strand, stranded synnema strand of internal layer, internal layer direction of lay dextrad, stranded synnema strand of outer layer, outer layer direction of lay
Left-hand；Tin plating soft copper conductor outer wrap high temperature resistant GRPP bands, low smoke halogen-free flame-retardant polyolefin is extruded in the outside of high temperature resistant GRPP bands 2
Insulation, low smoke halogen-free flame-retardant polyolefin insulation outside is the braiding cotton layer of cotton thread braiding, and braiding cotton layer is provided with flame retardant paint
Coating.
The tin plating soft copper conductor, is tin plating annealed copper conductor.
A kind of production technology of Double-layer flame-retardant humidity environmental communication cable, comprises the following steps：
（1）Prepare tin plating soft copper conductor：Synnema, synnema strand is constituted by the tinned copper wire of 47 diameter 0.50mm is stranded first,
Lay ratio is 25-30 times, and direction of lay is left-hand；After synnema, twisted again by 19 synnema strands, according to the arrangement mode of 1+6+12
The stranded tin plating soft copper conductor of composition；1, center synnema strand, outside point two-layer twisted bundles thread line, the stranded 6 synnemas stock of internal layer
Line, lay ratio is 12-14 times, internal layer direction of lay dextrad；The stranded 12 synnema strands of outer layer, lay ratio is 10-12 times of outer layer
Direction of lay left-hand；Direction outer layer left-hand internal layer dextrad is twisted again, and such conductor is twisted and produced to each layer when making twisted wire under tension
Rotating torque cancel each other, prevent each layer single line from being rotated to a direction and released, make conductor strand closely, increase cable
Anti-bending strength；Conductor diameter scope is controlled simultaneously, it is ensured that the external diameter of finished cable is not overproof, and resistance meets the requirements, it is ensured that cable
Electrical property；
（2）Tin plating soft copper conductor outer wrap high temperature resistant GRPP bands：
Band material uses high temperature resistant GRPP bands, 268 DEG C of fusing point, thickness 0.04mm；The vertical bag of high temperature resistant GRPP bands is in tin plating soft copper
Outside conductor, when insulation is extruded, vertical chartered plane is placed before the head of extruder, high temperature resistant GRPP bandwidth is 50mm, tin plating soft
, after indulging the loudspeaker nozzle on chartered plane, high temperature resistant GRPP bands longitudinal direction is coated on tin plating soft copper and leads for copper conductor and high temperature resistant GRPP bands
On body, when indulging bag, high temperature resistant GRPP bands put up >=20%；Then, tin soft copper conductor enters extruder, extruding extrusion insulation, one
The vertical bag in side is while extrusion insulation；The transfer between cabling procedure and extrusion operation is saved, longitudinal lapping causes band along cable
Axially coat, the insulation of squash type extrusion can be filled between conductor gap so that the construction of cable is even closer, increase cable
Anti-bending strength；The longitudinal pulling force of high temperature resistant GRPP bands is more than 120N/15mm, increases the tensile property of cable；
（3）Extrude low smoke halogen-free flame-retardant polyolefin insulation：
From 105 DEG C of irradiated crosslinking low-smoke and halogen-free flame retardant environment-friendly polyolefins as insulating materials, lead content is less than 300ppm, insulation
Material prescription is with polyolefin as base material, comprising modified EP rubbers, aluminium hydroxide, antioxidant, paraffin and carbon black, the matter of carbon black
Amount content >=2.5%, strengthens the weatherability of cable, can for a long time undergo resistance to day light aging；Aluminium hydroxide as fire retardant, addition
Mass ratio is 33.5%；
（4）Fire-retardant lacquer coat：
In the outer setting cotton thread braiding layer of low smoke halogen-free flame-retardant polyolefin insulation, cotton thread braiding layer is woven on 24 ingot braiders,
Cotton thread braiding 100% covers low smoke halogen-free flame-retardant polyolefin insulation；Fire-retardant lacquer coat, cable fire-proof are coated outside cotton thread braiding layer
Paint also acts as corrosion-resistant, moisture proof, Defend salt fog, mould proof effect except fire retardation；The thickness of fire-retardant lacquer coat is 1mm,
Using electrospray mode, spraying equipment is high-pressure spraying machine, and spraying number of times is 3 times, not exclusively dry in coat every time after spraying
In the case of, then spray the second layer, it is ensured that compactness between every layer and every layer.
The low smoke halogen-free flame-retardant polyolefin insulation, the mass percent between each component is as follows：Polyolefin 41.3%, change
Property EP rubbers 17.6%, aluminium hydroxide 33.5%, antioxidant 2.4%, paraffin 2.2%, carbon black 2.8%, color powder 0.2%.
The extruder, temperature control is between 110 DEG C to 180 DEG C.
Good effect of the present invention：Double-layer flame-retardant structure is constituted using low smoke halogen-free flame-retardant polyolefin insulation and flame retardant paint, and
Flame retardant paint also acts as damp-proof function simultaneously, and the effect of Double-layer flame-retardant is preferable, while the outside diameter of cable can be reduced, whole cable material
Material all uses environment-friendly materials, meets the good machinery of communication cable, physical property requirements.
Brief description of the drawings
Fig. 1 is embodiment of the present invention structural representation；
In figure：Tin plating soft copper conductor 1, high temperature resistant GRPP bands 2, low smoke halogen-free flame-retardant polyolefin insulation 3, braiding cotton layer 4, fire-retardant
Lacquer coat 5.
Specific embodiment
Below in conjunction with accompanying drawing, by implementing, the invention will be further described.
A kind of Double-layer flame-retardant humidity environmental communication cable, comprising tin plating soft copper conductor 1, high temperature resistant GRPP band 2, low cigarette without
Halogen fire retardant polyolefin insulation 3, braiding cotton layer 4 and fire-retardant lacquer coat 5, the tin plating soft copper conductor 1, by 47 diameter 0.50mm
Tinned copper wire it is stranded composition synnema strand, direction of lay is left-hand；Constituted tin plating soft copper and led by 19 synnema strands are stranded again
Body 1, one, center synnema strand, the stranded 6 synnema strands of internal layer, internal layer direction of lay dextrad, the stranded 12 synnemas stock of outer layer
Line, outer layer direction of lay left-hand；The outer wrap high temperature resistant GRPP of tin plating soft copper conductor 1 bands 2, extrude in the outside of high temperature resistant GRPP bands 2
Low smoke halogen-free flame-retardant polyolefin insulation 3, the outside of low smoke halogen-free flame-retardant polyolefin insulation 3 is the braiding cotton layer 4 of cotton thread braiding, is compiled
Knit cotton layer and be provided with fire-retardant lacquer coat 5.
The tin plating soft copper conductor 1, is tin plating annealed copper conductor.
A kind of production technology of Double-layer flame-retardant humidity environmental communication cable, comprises the following steps：
（1）Prepare tin plating soft copper conductor 1：Synnema, synnema strand is constituted by the tinned copper wire of 47 diameter 0.50mm is stranded first,
Lay ratio is 25-30 times, and direction of lay is left-hand；After synnema, twisted again by 19 synnema strands, according to the arrangement mode of 1+6+12
The stranded tin plating soft copper conductor 1 of composition；1, center synnema strand, outside point two-layer twisted bundles thread line, stranded 6 synnemas of internal layer
Strand, lay ratio is 12-14 times, internal layer direction of lay dextrad；The stranded 12 synnema strands of outer layer, lay ratio is 10-12 times outer
Layer direction of lay left-hand；Direction outer layer left-hand internal layer dextrad is twisted again, and such conductor is twisted and produced to each layer when making twisted wire under tension
Raw rotating torque cancels each other, and prevents each layer single line from being rotated to a direction and released, and makes conductor strand closely, increases cable
Anti-bending strength；Conductor diameter scope is controlled simultaneously, it is ensured that the external diameter of finished cable is not overproof, and resistance meets the requirements, it is ensured that electricity
The electrical property of cable；
（2）The outer wrap high temperature resistant GRPP of tin plating soft copper conductor 1 bands 2：
Band material uses high temperature resistant GRPP bands, 268 DEG C of fusing point, thickness 0.04mm；The vertical bag of high temperature resistant GRPP bands is in tin plating soft copper
Outside conductor, when insulation is extruded, vertical chartered plane is placed before the head of extruder, high temperature resistant GRPP bandwidth is 50mm, tin plating soft
, after indulging the loudspeaker nozzle on chartered plane, the longitudinal direction of high temperature resistant GRPP bands 2 is coated on tin plating soft copper for copper conductor and high temperature resistant GRPP bands
On conductor, when indulging bag, high temperature resistant GRPP bands put up >=20%；Then, tin soft copper conductor enters extruder, and extruding extrusion insulate,
Bag is indulged while extruding insulation；The transfer between cabling procedure and extrusion operation is saved, longitudinal lapping causes band along electricity
Cable is axially coated, and the insulation of squash type extrusion can be filled between conductor gap so that the construction of cable is even closer, increase cable
Anti-bending strength；The longitudinal pulling force of high temperature resistant GRPP bands is more than 120N/15mm, increases the tensile property of cable；
（3）Extrude low smoke halogen-free flame-retardant polyolefin insulation 3：
From 105 DEG C of irradiated crosslinking low-smoke and halogen-free flame retardant environment-friendly polyolefins as insulating materials, lead content is less than 300ppm, insulation
Material prescription is with polyolefin as base material, comprising modified EP rubbers, aluminium hydroxide, antioxidant, paraffin and carbon black, the matter of carbon black
Amount content >=2.5%, strengthens the weatherability of cable, can for a long time undergo resistance to day light aging；Aluminium hydroxide as fire retardant, addition
Mass ratio is 33.5%；
（4）Fire-retardant lacquer coat：
In the outer setting cotton thread braiding layer of low smoke halogen-free flame-retardant polyolefin insulation, cotton thread braiding layer is woven on 24 ingot braiders,
Cotton thread braiding 100% covers low smoke halogen-free flame-retardant polyolefin insulation；Fire-retardant lacquer coat, cable fire-proof are coated outside cotton thread braiding layer
Paint also acts as corrosion-resistant, moisture proof, Defend salt fog, mould proof effect except fire retardation；The thickness of fire-retardant lacquer coat is 1mm,
Using electrospray mode, spraying equipment is high-pressure spraying machine, and spraying number of times is 3 times, not exclusively dry in coat every time after spraying
In the case of, then spray the second layer, it is ensured that compactness between every layer and every layer.
In embodiment, specific embodiment is as follows：
Conductor structure：Conductor is tin plating annealed copper conductor.Conductor synnema first, by 47 tinned copper wire groups of diameter 0.50mm
Bunchy thread line, conductor lay ratio is 25-30 times, and synnema direction is left-hand.Twisted again according to 1+6 by 19 synnema strands after synnema
+ 12 stranded tin plating soft copper conductor of composition of arrangement mode, it is outermost layer left-hand that direction is twisted again, and lay ratio is 10-12 times, and internal layer is right
To lay ratio is 12-14 times.Direction outer layer left-hand internal layer dextrad is twisted again, and such conductor is twisted to each when making twisted wire under tension
The rotating torque that layer is produced cancels each other, and prevents each layer single line from being rotated to a direction and released, and makes conductor strand closely, increases
The anti-bending strength of cable；Control conductor diameter scope, it is ensured that the external diameter of finished cable is not overproof.Resistance meets the requirements, it is ensured that electricity
The electrical property of cable.
The outer band of conductor：Band material uses high temperature resistant GRPP bands, fusing point to be up to 268 DEG C, general plastic products extrusion
Temperature cannot all be melted, thickness of thin, only 0.04mm, and high temperature resistant GRPP bands can be used instead of common non-woven fabric, and it has
Thickness of thin（0.04mm), grammes per square metre is light（Less than 65g/m2), high temperature resistant（268 DEG C of fusing point）, pulling force it is strong（More than 120N/15mm), it is soft
Soft good the characteristics of, meet ROHS standards.The vertical bag of high temperature resistant GRPP bands is put when insulation is extruded outside conductor before extruder head
Vertical chartered plane is put, selection width is the high temperature resistant GRPP bands of 50mm, and conductor and band are by the way that after loudspeaker nozzle on vertical chartered plane, band is just
Longitudinal direction is coated on conductor, it is ensured that band puts up >=20%, and conductor enters extruder afterwards, and extruding extrusion insulation realizes that side is indulged
Bound edge is extruded, it is ensured that vertical to pack tightly close corrugationless, while squash type is insulating exruded, extrusion pressure control is proper, it is ensured that insulation can be filled out
Conductor gap the inside is charged to, makes the structure of cable even closer.Vertical bag saves the transfer between cabling procedure and extrusion operation, indulges
To it is wrapped so that band along cable axially coat, squash type extrusion insulation can be filled between conductor gap so that cable
Structure is even closer, increases the anti-bending strength of cable.And the longitudinal pulling force of GRPP bands is big（More than 120N/15mm), can be extra
Increase cable tensile property.
Insulation：Cable will meet environmentally friendly, fire-retardant, wear-resisting, bending resistance, low temperature resistant, resistance to daylight etc., and some arrange requirement, insulating materials
Selection be topmost.Consider from environmental angle, 300ppm is less than according to the detection of standard lead content, so insulating materials is selected
It is 105 DEG C of irradiated crosslinking low-smoke and halogen-free flame retardant environment-friendly polyolefins.Material prescription is to add modified second by base material of polyolefin
The environmental protection raw material such as the third rubber, aluminium hydroxide, antioxidant, paraffin, carbon black, it is in order that insulation that modified EP rubbers is added in material
Material more soft and high resilience, could so meet the bending resistance of cable, wear-resisting, impact resistance.Content of carbon black in formula >=
2.5%, strengthen the weatherability of cable, can for a long time undergo resistance to day light aging.The addition of aluminium hydroxide fire retardant can meet cable-flame retardant
It is required that, addition percent mass ratio is 33.5%, it is ensured that insulation oxygen index (OI) can reach more than 35, and cable can be enable to reach bunchy A
Class combustion requirements, charing rate is fast during burning, and good film-forming property, the short time lights turning off stove self-extinguishment.And in insulating materials formula
High content carbon black is added in face, cable is used under long-term resistance to daylight environment.It is exposed material to insulate, and increased cable
Mechanical stability, irradiation dose control detects that the mechanical and physical performance of insulation can be controlled in ideal indicator between 8-12Mpa
On.Cable maximum operation (service) temperature is 105 DEG C, and minimum temperature in use is -40 DEG C, and use occasion is than wide.
The present embodiment low smoke halogen-free flame-retardant polyolefin insulate, and the mass percent between each component is as follows：Polyolefin
41.3%th, be modified EP rubbers 17.6%, aluminium hydroxide 33.5%, antioxidant 2.4%, paraffin 2.2%, carbon black 2.8%, color powder
0.2%.The present embodiment insulation color is black.
The extruder, temperature control is between 110 DEG C to 180 DEG C.Use the low smoke and zero halogen Screw Extrusion of low compression ratio
Insulation, extruder temperature is controlled between 110 DEG C to 180 DEG C, and extruder temperature controller area is eight regions, and heating zone is more so that
Material plasticizing is more full and uniform, and regional extrusion temperature see the table below.
Extruder temperature controller table
| 90/25 extruder | One area | 2nd area | 3rd area | 4th area | 5th area | 6th area | Machine neck | Head |
| Extrusion temperature（±15℃） | 110℃ | 130℃ | 150℃ | 165℃ | 170℃ | 175℃ | 185℃ | 180℃ |
Cable fire-proof paint：Insulation reaches that flame-retardancy requirements are also far from enough, in order that cable can extend cable in fire temporarily
Power-on time, it is necessary to which double insurance just can be with.In insulating outer layer there is provided cotton thread braiding layer, cotton thread braiding layer need to be compiled in 24 ingots
Woven on loom, it is ensured that cotton thread braiding layer 100% covers insulated wire cores, so could be complete in the Fireproof flame-retardant paint of the outer coating of braiding
It is complete uniform.Environmental-protection flame-retardant lacquer coat is coated outside cotton thread braiding layer, cable fire-proof paint is each by the addition of tertiary acrylic emulsion water-based material
The composition such as fire-proof flame-retarded agent, plasticizer is planted, can voluntarily be configured, it is also possible to from producer's purchase.When cable fire-proof lacquer coat is by fire
The spongy foam thermal insulation layer of even compact can be generated, can effectively be suppressed, be intercepted flame transmission and spread, to electric wire, electricity
Cable plays a protective role.Cable fire-proof paint also has humidity resistance simultaneously, and by 7d moisture-resistant tests, coating is without corrugation, without peeling, nothing
Foaming, it is ensured that cable can be applied in wet environment.The present embodiment cable fire-proof paint is outsourcing product, the expensive friend's fire proofing material in Langfang
Produced in Co., Ltd, the trade mark is the cable fire-proof paint of YDAH-102.This layer of enamelled coating can generate the sponge of even compact when by fire
Shape insulated foam coating, can effectively suppress, intercept flame transmission and spread.By combustion test it can be seen that, coat cable
The cable of fire resistant coating cable surface when fire is met can send " taste " sound, and subsequent cable surface forms one layer of foam carburization zone, this
Layer carburization zone plays starvation while playing heat-insulated effect, prevents cable too high and short-circuit because of temperature.Stop supplying thermoelectricity cable
Burning automatic distinguishing, effectively prevents propagation of flame.Fire resistant coating may also operate as corrosion-resistant, moisture proof, anti-salt except fire retardation
Mist, mould proof effect, can make cable that the electric property and mechanical performance without influenceing cable are used under complex working condition.Electricity
Cable fire resistant coating is asked can allocate shades of colour, and abundant color plays certain decoration function.The thickness of fire-retardant lacquer coat is must
Must ensure just to can guarantee that flame retardant effect in more than 1mm.Compared to flame retardant sheath layer is extruded outside insulation, the use of enamelled coating of preventing fires is not
Only reduce the entire outer diameter of cable, mitigate the weight of cable, while flame retardant effect is substantially better than flame retardant plastic products, it is good
Flame-retardant sheath substitute.Cable fire-proof paint uses spraying method, and spraying equipment is high voltage type flush coater, and coating thickness is in 1mm, spray
It is 3 times to apply number of times.The second layer is then sprayed in the case where coat is not exclusively dry after spraying every time, so just can guarantee that every
Compactness between layer and every layer.Cable lettering needs that just oil can be prevented with coding lettering after cable fire-proof paint is completely dry
Ink is dipped into enamelled coating the inside causes lettering unclear.
Claims (3)
1. a kind of Double-layer flame-retardant humidity environmental communication cable, it is characterised in that：Comprising tin plating soft copper conductor（1）, high temperature resistant
GRPP bands（2）, low smoke halogen-free flame-retardant polyolefin insulation（3）, braiding cotton layer（4）With fire-retardant lacquer coat（5）, the tin plating soft copper
Conductor（1）, synnema strand is constituted by the tinned copper wire of 47 diameter 0.50mm is stranded, direction of lay is left-hand；By 19 synnemas
Strand is stranded again to constitute tin plating soft copper conductor（1）, one, center synnema strand, the stranded 6 synnema strands of internal layer, the stranded side of internal layer
To dextrad, the stranded 12 synnema strands of outer layer, outer layer direction of lay left-hand；Tin plating soft copper conductor（1）Outer wrap high temperature resistant GRPP
Band（2）, in high temperature resistant GRPP bands（2）Outside extrudes low smoke halogen-free flame-retardant polyolefin insulation（3）, low smoke halogen-free flame-retardant polyolefin is exhausted
Edge（3）Outside is the braiding cotton layer of cotton thread braiding（4）, weave cotton layer and be provided with fire-retardant lacquer coat（5）.
2. a kind of Double-layer flame-retardant humidity environmental communication cable according to claim 1, it is characterised in that：It is described tin plating soft
Copper conductor（1）, it is tin plating annealed copper conductor.
3. a kind of production technology of Double-layer flame-retardant humidity environmental communication cable, it is characterised in that comprise the following steps：
Prepare tin plating soft copper conductor（1）：Synnema, synnema strand is constituted by the tinned copper wire of 47 diameter 0.50mm is stranded first,
Lay ratio is 25-30 times, and direction of lay is left-hand；After synnema, twisted again by 19 synnema strands, according to the arrangement mode of 1+6+12
The stranded tin plating soft copper conductor of composition；1, center synnema strand, outside point two-layer twisted bundles thread line, the stranded 6 synnemas stock of internal layer
Line, lay ratio is 12-14 times, internal layer direction of lay dextrad；The stranded 12 synnema strands of outer layer, lay ratio is 10-12 times of outer layer
Direction of lay left-hand；Direction outer layer left-hand, internal layer dextrad are twisted again；
Tin plating soft copper conductor outer wrap high temperature resistant GRPP bands（2）：
Band material uses high temperature resistant GRPP bands, 268 DEG C of fusing point, thickness 0.04mm；The vertical bag of high temperature resistant GRPP bands is in tin plating soft copper
Outside conductor, when insulation is extruded, vertical chartered plane is placed before the head of extruder, high temperature resistant GRPP bandwidth is 50mm, tin plating soft
, after indulging the loudspeaker nozzle on chartered plane, high temperature resistant GRPP bands longitudinal direction is coated on tin plating soft copper and leads for copper conductor and high temperature resistant GRPP bands
On body, when indulging bag, high temperature resistant GRPP bands put up >=20%；Then, tin soft copper conductor enters extruder, extruding extrusion insulation, one
The vertical bag in side is while extrusion insulation；The longitudinal pulling force of high temperature resistant GRPP bands is more than 120N/15mm；
Extrude low smoke halogen-free flame-retardant polyolefin insulation（3）：
From 105 DEG C of irradiated crosslinking low-smoke and halogen-free flame retardant environment-friendly polyolefins as insulating materials, lead content is less than 300ppm, insulation
Material prescription is with polyolefin as base material, comprising modified EP rubbers, aluminium hydroxide, antioxidant, paraffin and carbon black, the matter of carbon black
Amount content >=2.5%；Used as fire retardant, the mass ratio of addition is 33.5% to aluminium hydroxide；
Fire-retardant lacquer coat：
In the outer setting cotton thread braiding layer of low smoke halogen-free flame-retardant polyolefin insulation（4）, cotton thread braiding layer is compiled on 24 ingot braiders
Knit, cotton thread braiding 100% covers low smoke halogen-free flame-retardant polyolefin insulation；Fire-retardant lacquer coat is coated outside cotton thread braiding layer；Flame retardant paint
The thickness of coating is 1mm, and using electrospray mode, spraying equipment is high-pressure spraying machine, and spraying number of times is 3 times, every time after spraying,
In the case where coat is not exclusively dry, the second layer is then sprayed, it is ensured that compactness between every layer and every layer.
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| CN201710269470.1A CN106876001A (en) | 2017-04-24 | 2017-04-24 | A kind of Double-layer flame-retardant humidity environmental communication cable and its production technology |
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Application publication date: 20170620 |