CN107622829A - A kind of multi-layer cable - Google Patents
A kind of multi-layer cable Download PDFInfo
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- CN107622829A CN107622829A CN201710838536.4A CN201710838536A CN107622829A CN 107622829 A CN107622829 A CN 107622829A CN 201710838536 A CN201710838536 A CN 201710838536A CN 107622829 A CN107622829 A CN 107622829A
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Abstract
The invention discloses a kind of novel cable, including conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell.Wherein conductive core is made of more than 99% fine copper；The thickness proportion of each layer is 12 14：2‑4：15‑18：2‑4：6‑7；First insulating barrier is made up of the high polymer material compound of following component：One or more in polypropylene, epoxy resin, polyamide, polyester, phenolic resin；Second insulating barrier is made up of the high polymer material compound of following component：One or more in polyethylene, polypropylene, polyvinyl chloride and organosilan are made；Elastic layer is made up of polyvinyl chloride and polyurethane compound, both ratios 12：69, the elastic 8v% of layer porosity 4,15 μm of empty diameter；Shell is made up of one or two in polyvinyl chloride and/or polyethylene.The cable material of the present invention uses the sandwich construction of brand-new design, and each Rotating fields have unique enhanced properties, and cable insulation is without peeling, the closely knit cooperation of insulating barrier and conductive core, securely and reliably.
Description
Technical field
The present invention relates to a kind of cable material, belong to field of power transmission, it is more particularly to a kind of with composite protection layer
Cable material.
Background technology
Cable refers to the cable for the similar rope being hinged to form by several wires or several groups of wires, between every group of wire mutually
Insulation, rich multilayer insulation or the coating of functional layer are wrapped around wire.With rapid economic development, the application environment of cable is big
Widen greatly, beyond the general application for having cable.Thus according to different application environment, cable needs the performance meeting provided
Different, being directed to specific use environment needs special optimization design to realize that the performance of cable meets expected application
Environmental requirement.
The cable of power application transmission, due to the significantly lifting of various regions power consumption in the market, the quality of cable will
Ask and also increase substantially, transmitting voltage and current in the cable, all constantly rise becomes big.Still to keep electricity in this case
The good stabilizing quality of cable, propose the requirement of any for the proof voltage of the sandwich layer of cable, it is often more important that for cable
The requirement of insulating barrier is even more to increase substantially.
To ensure that the safety coefficient of power transmission improves, the laying of cable is by needing design to be embedded under ground end.So
And underground environment is extremely complex and is often associated with the unsafe factors such as high temperature, high humidity, mouse destruction.Therefore, it is right in existing design
In cable material application environment consider often more lack, or consider fully after, the reason based on cost control but without
Method it is anticipated that design form implemented, cause cable to be difficult to reach safety requirements.
In addition, some existing cables design when, because lacking experience for selection, or contrived experiment are not filled
Point, there is mutual ill-matched problem in insulating layer material.Cable material just finds various defects when application, it has to
Re-start reparation corrigendum.The waste of huge manpower, financial resource is caused, the competitiveness of enterprise is reduced, hampers engineering
Progress.
The content of the invention
It is an object of the invention to overcome the cable material design in the presence of prior art insufficient, for exceedingly odious
A kind of tolerance performance deficiency of environment, there is provided novel cable.In addition, the cable material of the present invention will also overcome existing cable to insulate
Layer mutual cooperation relation is bad, the defects of deformation, peeling, local defect occurs, it is ensured that electric cable compound insulation layer can be extreme
Under adverse circumstances, good stability is kept, there is provided safe and reliable power transmission carrying.
In order to realize foregoing invention purpose, the invention provides following technical scheme：
A kind of novel cable, including conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell.Wherein conductive core uses
More than 99% fine copper is made.
The thickness proportion of each layer is 12-14：2-4：15-18：2-4：6-7.THICKNESS CALCULATION is entered according to cross-sectional diameter direction
Row survey calculation, it is ensured that the thickness proportion uniformity along cross section all directions of each layer, strictly prevent that local thickness is relatively low
Or it is higher, prevent defect sites from producing.Preferably, the integral thickness of insulating barrier/conductive core thickness >=1.9.Insulating barrier includes
First insulating barrier, the second insulating barrier, elastic layer and shell, the integral thickness of insulating barrier are the thickness sum of above layers（I.e.
One insulating barrier, the second insulating barrier, the thickness sum of elastic layer and shell）.Conductive core thickness is calculated with the diameter of conductive core.
First insulating barrier is made up of the high polymer material compound of following component：Polypropylene, epoxy resin, polyamide,
One or more in polyester, phenolic resin.
Second insulating barrier is made up of the high polymer material compound of following component：Polyethylene, polypropylene, polyvinyl chloride and have
One or more in machine silane are made.
Elastic layer is made up of polyvinyl chloride and polyurethane compound, both ratio 1-2：6-9, elastic layer porosity 4-8v%,
1-5 μm of the diameter in cavity.
Shell is made up of one or two in polyvinyl chloride and/or polyethylene.
The cable material of the present invention uses the sandwich construction of brand-new design, and each Rotating fields have unique enhanced properties, its
In the first insulating barrier be combined using a variety of high polymer materials, and center Conductive Core be tightly combined, it can be ensured that cable
The peeling of insulating barrier does not occur, it is ensured that the closely knit cooperation of integral insulation layer and conductive core, securely and reliably.Second insulating barrier use and
The material composition of first insulating barrier compounding collaboration so that dielectric layers mutual cooperation performance is good, not stratified, prevents defect from producing
It is raw.Second insulating barrier provides more preferable insulation attribute, ensures the application security of cable.Then it is exhausted in the first insulating barrier and second
Edge layer provides necessary additional protective layers on the basis of coordinating --- and elastic layer and shell, elastic layer use polyvinyl chloride and poly- ammonia
Ester compound, certain porosity is realized by processing of foaming, porosity causes have during the application laying of cable material
There is certain elasticity, sharp keen device impact wreckage can be avoided to cause local defect.The outside of elastic layer is provided with shell, shell
Layer uses compact texture, and outer protection is provided to elastic layer, prevents sharp keen device collision from directly causing the local failure of elastic layer,
Both ensured that cable had certain elasticity, and by sharp keen impact wreckage elastic construction the bulk strength of cable will not have been kept reliable again
Safety.
Further, one layer of organosilan is coated between first insulating barrier and the second insulating barrier, organosilan is adding
Coating is got on when work, ensures that the property of cable meets to require.Organosilan has crosslinked action, it is possible to achieve the first insulation
Layer be combined with each other with the second insulating barrier.
Further, the raw material that first insulating barrier uses are polypropylene：Epoxy resin, phenolic resin=3-5:1-2:
1 compound.Mixed material is carried out according to aforementioned proportion, the copper core of the first insulating barrier formed and conductive core is processed by melting
High with reference to adaptation, the conductive core stability mutual with the insulating barrier that it is directly contacted is good, in the situation of extreme heating
Under, be not in insulating barrier and conductive core separation generation.
Further, second insulating barrier is polyethylene：Polypropylene=1-9:Made of 9-1 compound.Second insulating barrier
Accounting is very big, is the layer structure of main offer insulation protection, exhausted as second from polyethylene and polyacrylic compound
Edge layer, there is the characteristics of property is stable, and insulation effect is good, and polyethylene and polyacrylic quality are easier to control, for exhausted
The security of edge layer is secure.
Further, 0.05-0.3% crosslinking agent is added with the second insulating barrier.The crosslinking agent is silane.Preferably, institute
It is the one or more in monosilane, disilane, trisilalkane to state crosslinking agent.Adding a certain amount of crosslinking agent can facilitate for master
The insulating barrier wanted carries out crosslinking Treatment, improves the intensity and insulating properties of the second insulating barrier.
Further, 0.01-0.3% foaming agents are added in the elastic layer preparing raw material.
Further, AC foaming agent foams are added in elastic layer and forms cavity.AC foaming agents are azodicarbonamide.
Further, in elastic layer, polyvinyl chloride molecule material, which is blended in polyurethane, forms compound progress elastic layer
Shaping.It is molded polyurethane heating and melting in preparation process first, then adds polyvinyl chloride particles and foaming agent, is combined to the
On two insulating barriers, elastic layer is formed.Elastic layer after its formation, keeps the 11-15 seconds at a temperature of 210-220 DEG C, completes foaming, shape
Into foaming layer.
Further, the shell is polyvinyl chloride.
Further, 0.5-2wt% inorganic powder reinforcing agent is with the addition of in the shell.The inorganic powder reinforcing agent is
One or both of silicon carbide micro-powder and nano silicon, the nano silicon particle diameter 200-800nm, carborundum are micro-
Powder particles particle diameter 12-80 microns.
Further, composite flame-proof additive is also added with the shell, the dosage of the composite flame-proof additive is shell
The 2-5% of layer weight.
Preferably, the composite flame-proof additive is ammonium dihydrogen phosphate, monoammonium phosphate, ammonium carbonate, aluminium hydroxide, tristearin
One or more in sour zinc and Nanometer limestone powder.It is highly preferred that the composite flame-proof additive is ammonium dihydrogen phosphate, carbon
Sour ammonium, aluminium hydroxide, zinc stearate, the composition of agstone, its weight ratio are：Ammonium dihydrogen phosphate：Ammonium carbonate：Hydrogen-oxygen
Change aluminium：Zinc stearate：Agstone=20:10-30:10-16:2-10:5-10.The compound resistance formed using above-mentioned Multiple components
Combustion additive component applies, the cooperation hydroxide fire-retardant by thermally decomposing having the function that strongly of ammonium dihydrogen phosphate and ammonium carbonate
Aluminium and zinc stearate provide alkaline environment and ion-catching effect, can quickly suppress in the case of cable is surprisingly ignited
Burning, pilot section automatic distinguishing.Effect compared to the application of existing in general flame retardant constituent is more preferable, can be hindered reducing
Enhancing flame retardant effect is realized while firing agent dosage.Because the application total amount of composite flame-retardant agent is less so that shell strong in itself
Degree can preferably keep stable, avoid adding the rapid decay that excessive fire retardant causes insulating barrier self-strength, Yi Jirong
The defects of easily being destroyed for external force.
Composite flame-proof additive prepares in the following ways：Ball mill grinding is soaked into powder during grinding with ethanol
Bubble, milling time 5-30 minutes, after grinding is completed, add neopelex 1-3wt%（Add relative to composite flame-proof
Add agent gross mass）, 1-5min is stirred vigorously, preferably speed of agitator >=1200r/min, preferably >=2000r/min.20-40℃
It is evaporated under reduced pressure and removes ethanol, obtains composite flame-proof additive.Secondary composite flame-proof additive is when shell extrusion molding, addition
Into the polyvinyl chloride of thawing and/or polyethylene raw material, and polyethylene/polyvinyl chloride is together shaped to the shell of cable.This hair
Bright fire retardant passes through the previously prepared processing of ball mill, and addition neopelex causes fire retardant to be mixed into uniformly, more
The flame retardant constituent that kind is mutually promoted can be uniformly dispersed in together so that the synergy of fire retardant more preferably, is also easier to
Addition is applied in shell resin raw material.
The present invention additionally provides a kind of method for preparing above-mentioned novel cable simultaneously, comprises the following steps：
（1）Proportionally the raw material of the insulating barrier of mixed preparing first, heating and melting, conductive core continue through the first extrusion molding
Section, the first insulating barrier is formed in conductive wicking surface.
（2）It is air-cooled to the first 80-120 DEG C of insulating barrier temperature after first insulation formable layer, it is molten using 2-5wt% silane ethanol
Liquid is sprayed to the first surface of insulating layer, and after spraying, heated-air drying removes ethanol.Cable continues through the second extrusion molding section,
Surface forms the second insulating barrier.Second extrusion molding section in advance melts the material of the second insulating barrier, and wait is expressed into cable table
Face is molded.
（3）Formed after the second insulating barrier, keep 120-150 DEG C of cable surface temperature, into the 3rd extrusion molding section, the
Three extrusion molding sections form elastic layer in the second surface of insulating layer.The material of elastic layer is polyvinyl chloride and polyurethane compound,
Wherein add 0.01-0.3% foaming agents.
（4）After elastic layer is formed, by the 4th extrusion molding section, shell structurre is formed.Cable continuous moving is to infrared
In heating furnace, the radiant heating 10-15 seconds, then air-cooled to less than 80 DEG C, room temperature is naturally cooled to, obtains cable.
During the present invention prepares cable, include the first insulating barrier, the second insulating barrier, elastic layer and shell successively
Shaping, for the forming process of each functional layer, the cooperation of adaptability, the combination first of conductive core are carried out in different ways
Direct temperature effect is strong when insulating barrier, by temperature control in 80-120 DEG C relatively low of temperature so that cable core and directly
The insulating barrier combination effect of contact is good.Then, combine upper second insulating barrier when, by the use of the first insulating barrier as mediate,
Temperature is slightly higher, and shaping speed is fast, then corresponding cable surface forming elastic layer, and elastic layer is anti-with foaming while shaping
Should, form lacunose elastic layer so that cable surface has certain pliability, finally extrudes shell, infrared heating radiation
Processing, quick realize are heating and curing and promoted for the complete invoice of foaming layer, realize the elastic Rotating fields of micro-pore, really
Protect each functional layer coordinates completion close between each other.
Sprayed between wherein the first insulating barrier and the second insulation formable layer from silane ethanol solution, dry and remove second
After alcohol, the second insulating barrier and the first insulating barrier are fully mated between each other, form compact internal insulating layer, realize complete
Insulating properties.
Compared with prior art, beneficial effects of the present invention：
1. cable material of the present invention uses the sandwich construction of brand-new design, each Rotating fields have unique enhanced properties, wherein the
One insulating barrier is combined using a variety of high polymer materials, and the Conductive Core in center is tightly combined, it can be ensured that cable is not sent out
The peeling of raw insulating barrier, it is ensured that the closely knit cooperation of integral insulation layer and conductive core, securely and reliably.
2. being compounded between insulating barrier of the present invention, concertedness is good, and not stratified, zero defect, insulation attribute is good, cable application safety
Reliably.
3. there is certain elasticity during the application laying of cable material of the present invention, sharp keen device can be avoided to touch
Crash through and badly cause local defect.Outside is provided with shell, and shell uses compact texture, prevents sharp keen device collision from directly causing bullet
The local failure of property layer, had both ensured that cable had certain elasticity, again will not be by sharp keen impact wreckage elastic construction.Applied to ground
Lower laying environment, is more tolerant of extreme environment, meets extreme applications requirement.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.
Embodiment 1
Novel cable, including fine copper conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell.The thickness proportion of each layer
For 13：3：18：3：6.First insulating barrier is made up of high polymer material compound of the weight than following component：Polypropylene：Epoxy
Resin：Polyamide：Phenolic resin=3:1:1:1.Second insulating barrier is made up of the high polymer material compound of following component：Poly- second
Alkene, polypropylene and monosilane composition, part by weight is polyethylene 5:5:0.01.Elastic layer is by polyvinyl chloride and polyurethane compound
It is made, both ratios 2：9, elastic layer porosity 7.6v%, 3-5 μm of empty diameter.Shell is made up of polyvinyl chloride.
Embodiment 2
Novel cable is made up of fine copper conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell.The thickness ratio of each layer
Example is 14：2：18：4：7.First insulating barrier is made up of following parts by weight high polymer material compound：8 parts of polypropylene, asphalt mixtures modified by epoxy resin
2 parts of fat, 1 part of polyamide, 0.5 part of polyester.Second insulating barrier is made up of following parts by weight macromolecule raw material compound：Polyethylene 10
Part, 10 parts of polypropylene, 0.5 part of polyvinyl chloride and 0.05 part of disilane.Elastic layer is made up of polyvinyl chloride and polyurethane compound,
Both ratios 1：6, elastic layer porosity 4.5v%, 2-4 μm of empty diameter.Shell is by polyvinyl chloride and polyethylene 1:1 parts by weight
Raw material compound is made.
Embodiment 3
Novel cable, including fine copper conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell.The thickness proportion of each layer
For 12：2：15：4：7.First insulating barrier is made up of the high polymer material compound of following component：Polypropylene：Epoxy resin,
Phenolic resin=4:2:1.Second insulating barrier is made up of the high polymer material compound of following component：Poly- polyethylene：Polypropylene=1:1
Compound based on expect, add 0.4% monosilane（Relative to the second insulating barrier compound）.Elastic layer by polyvinyl chloride and
Polyurethane compound is made, both ratios 2：7, elastic layer porosity 6.9v%, 1-3 μm of empty diameter.Shell is by polyvinyl chloride
It is made.
Comparative example 1
The composition of cable does not apply monosilane simply as crosslinking agent with embodiment 3 in the second insulating barrier.
Embodiment 4
Novel cable, including fine copper conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell.The thickness proportion of each layer
For 13：3：16：4：7.First insulating barrier is made up of the high polymer material compound of following component：Polypropylene：Epoxy resin,
Phenolic resin=5:1:1.Second insulating barrier is made up of the high polymer material compound of following component：Poly- polyethylene：Polypropylene=9:1
Compound based on expect, add 0.4% monosilane（Relative to the second insulating barrier compound）.Elastic layer by polyvinyl chloride and
Polyurethane compound is made, both ratios 2：9, add 0.2wt%AC foaming agents, elastic layer porosity 6.5v%, empty diameter
4-5μm.Shell is by polyvinyl chloride and polyethylene 1:1 weight is made than raw material, addition 1wt% nano silicons, the nanometer of application
Silica particle diameter 250-400nm.
Embodiment 5
Novel cable is made up of fine copper conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell, the thickness ratio of each layer
Example is 11：2：15：3：6.First insulating barrier is made up of the high polymer material compound of following component：Polypropylene：Epoxy resin,
Phenolic resin=5:2:1.Second insulating barrier is made up of the high polymer material compound of following component：Poly- polyethylene：Polypropylene=3:1
Compound based on expect, add 0.3% monosilane（Relative to the second insulating barrier compound）.Elastic layer by polyvinyl chloride and
Polyurethane compound is made, both ratios 1：4, add 0.17wt%AC foaming agents, elastic layer porosity 5.9v%, empty diameter
4-5μm.Shell is by polyvinyl chloride and polyethylene 3:1 weight adds 1wt% nano silicons and 0.5% carborundum is micro- than raw material
Powder is made, wherein nano silicon particle diameter 250-400nm, 40-60 μm of silicon carbide micro-powder.
Embodiment 6
By conductive core Hot-blast Heating to 50 DEG C, pass through the first extrusion molding section.Conductive wicking surface extrude the first insulating barrier, first
Insulating barrier uses polypropylene：Epoxy resin, phenolic resin=5:1.5:The fused materials of 1 compound carry out extrusion molding.So
Afterwards, by air-cooled to 100 DEG C of the first insulating barrier, to its surface spray 2.5wt% silane ethanol solutions, after spraying, heated-air drying removes
Ethanol.Cable continues through the second extrusion molding section, and the second insulating barrier is formed on surface.Second insulating barrier is polyethylene：Poly- third
Alkene=4:1 compound.Formed after the second insulating barrier, keep 135 DEG C of cable surface temperature, into the 3rd extrusion molding section, the
Three extrusion molding sections form elastic layer in the second surface of insulating layer.The material of elastic layer is polyvinyl chloride and polyurethane 1：4 mixing
Material, wherein addition 0.1wt%AC foaming agents.After elastic layer is formed, cable passes through the 4th extrusion molding section, forms shell structurre.
4th extrusion molding section application shell material is polyvinyl chloride：Polyethylene=3:1 compound, wherein the carbon added with 0.5wt%
SiClx micro mist（15-30μm）With 0.5wt% nano silicon（400-600nm）.Finally, cable is continued through into infrared add
In hot stove, radiant heating 14 seconds, then air-cooled to less than 80 DEG C, room temperature is naturally cooled to, obtains cable.
Comparative example 2
Implementation process is with embodiment 6, simply shapeless elastic layer, direct combination shell.
Embodiment 7
By conductive core Hot-blast Heating to 42 DEG C, pass through the first extrusion molding section.Conductive wicking surface extrude the first insulating barrier, first
Insulating barrier uses polypropylene：Epoxy resin, phenolic resin=3:2:The fused materials of 1 compound carry out extrusion molding.Then,
By air-cooled to 90 DEG C of the first insulating barrier, to its surface spray 3wt% silane ethanol solutions, after spraying, heated-air drying removes ethanol.
Cable continues through the second extrusion molding section, and the second insulating barrier is formed on surface.Second insulating barrier is polyethylene：Polypropylene=2:5
Compound.Formed after the second insulating barrier, keep 140 DEG C of cable surface temperature, into the 3rd extrusion molding section, the 3rd extrusion
Profiled section forms elastic layer in the second surface of insulating layer.The material of elastic layer is polyvinyl chloride and polyurethane 1：3 compounds, wherein
Add 0.3%AC foaming agents.After elastic layer is formed, cable passes through the 4th extrusion molding section, forms shell structurre.4th extrusion
Profiled section application shell material is mainly polyvinyl chloride, and 2wt% nano silicons are added with shell material.Finally, by cable
Continue through in infrared heating furnace, radiant heating 10 seconds, then air-cooled to less than 80 DEG C, naturally cool to room temperature, obtain cable.
Embodiment 8
Prepare composite flame-proof additive：Take ammonium dihydrogen phosphate 20g, ammonium carbonate 15g, aluminium hydroxide 13g, zinc stearate 7g, lime
Stone flour 10g, mixing, add in ball mill and grind, ethanol immersion protection, milling time 5-30 minutes, after grinding is completed, addition
Neopelex 1.3g, 1-5min is stirred vigorously, 25 DEG C are evaporated under reduced pressure removing ethanol, obtain composite flame-proof additive.
By conductive core Hot-blast Heating to 40 DEG C, pass through the first extrusion molding section.The first insulating barrier is extruded in conductive wicking surface,
First insulating barrier uses polypropylene：Epoxy resin, phenolic resin=4:1:The fused materials of 1 compound carry out extrusion molding.So
Afterwards, by air-cooled to 120 DEG C of the first insulating barrier, to its surface spray 5wt% silane ethanol solutions, after spraying, heated-air drying removes second
Alcohol.Cable continues through the second extrusion molding section, and the second insulating barrier is formed on surface.Second insulating barrier is polyethylene：Polypropylene=
1:9 compound.Formed after the second insulating barrier, keep 150 DEG C of cable surface temperature, into the 3rd extrusion molding section, the 3rd
Extrusion molding section forms elastic layer in the second surface of insulating layer.The material of elastic layer is polyvinyl chloride and polyurethane 1：4 compounds,
Wherein add 0.12%AC foaming agents.After elastic layer is formed, cable passes through the 4th extrusion molding section, forms shell structurre.4th
Extrusion molding section application shell material is polyvinyl chloride, heating and melting polyvinyl chloride, the silicon carbide micro-powder added with 1wt%（18-
25μm）, after melting completely, composite flame-proof additive, extrusion molding shell are added before to be extruded.Finally, cable is continued through
In infrared heating furnace, radiant heating 10 seconds, then air-cooled to less than 80 DEG C, room temperature is naturally cooled to, obtains cable.The cable has
There is certain fire resistance, ignitability is poor, and naked light being capable of automatic distinguishing after igniting.
Comparative example 3
Prepare the process of cable and raw material is selected with embodiment 8, simply after the first insulation formable layer, silane ethanol of not spraying
Solution.
Test
Above-described embodiment 1-8 and comparative example 1-3 cables prepared are tested, the performance of cable is evaluated, specifically includes cable
Insulating properties, compact structure stability, structural strength.
By check analysis, the cable of comparative example preferable using the cable performance of scheme of embodiment of the present invention preparation is found
In the presence of more or less deficiency, the advantageous properties of performance cable that can not be cmpletely.
Embodiment 9
By conductive core Hot-blast Heating to 40 DEG C, pass through the first extrusion molding section.Conductive wicking surface extrude the first insulating barrier, first
Insulating barrier uses polypropylene：Epoxy resin, phenolic resin=3:2:The fused materials of 1 compound carry out extrusion molding.Then,
By air-cooled to 110 DEG C of the first insulating barrier, to its surface spray 4wt% monosilane ethanol solutions, after spraying, heated-air drying removes second
Alcohol.Cable continues through the second extrusion molding section, and the second insulating barrier is formed on surface.Second insulating barrier is polyethylene：Polypropylene=
1:9 compound.Formed after the second insulating barrier, keep 150 DEG C of cable surface temperature, into the 3rd extrusion molding section, the 3rd
Extrusion molding section forms elastic layer in the second surface of insulating layer.The material of elastic layer is polyvinyl chloride and polyurethane 2：5 compounds,
Wherein add 0.12%AC foaming agents.After elastic layer is formed, cable passes through the 4th extrusion molding section, forms shell structurre.4th
Extrusion molding section application shell material is polyvinyl chloride, and 1wt% silicon carbide micro-powder is added with shell material（18-25μm）.Most
Afterwards, cable is continued through in infrared heating furnace, radiant heating 8 seconds, then air-cooled to less than 70 DEG C, naturally cools to room temperature,
Obtain cable.Through examining, the insulating performance of cable is very outstanding, and compact structure stability is splendid, the MPa of tensile strength 34.5, knot
Structure intensity is considerably beyond in general cable wire.With good anti-flammability, do not propagated with naked light.
Above example is the present invention preferably one of embodiment, is not intended as the limit to technical solution of the present invention
System, all technologies realized based on thinking of the present invention belong to the scope of the present invention.
Claims (3)
1. a kind of novel cable, including conductive core, the first insulating barrier, the second insulating barrier, elastic layer and shell.
2. wherein conductive core is made of more than 99% fine copper；
The thickness proportion of each layer is 12-14：2-4：15-18：2-4：6-7；
First insulating barrier is made up of the high polymer material compound of following component：Polypropylene, epoxy resin, polyamide, polyester,
One or more in phenolic resin；
Second insulating barrier is made up of the high polymer material compound of following component：Polyethylene, polypropylene, polyvinyl chloride and organosilicon
One or more in alkane are made；
Elastic layer is made up of polyvinyl chloride and polyurethane compound, both ratio 1-2：6-9, elastic layer porosity 4-8v%, cavity
1-5 μm of diameter；
Shell is made up of one or two in polyvinyl chloride and/or polyethylene.
3. a kind of method for preparing above-mentioned novel cable, comprises the following steps：
（1）Proportionally the raw material of the insulating barrier of mixed preparing first, heating and melting, conductive core continue through the first extrusion molding
Section, the first insulating barrier is formed in conductive wicking surface；
（2）It is air-cooled to the first 80-120 DEG C of insulating barrier temperature after first insulation formable layer, using 2-5wt% silane ethanol solution to
First surface of insulating layer is sprayed, and after spraying, heated-air drying removes ethanol；Cable continues through the second extrusion molding section, on surface
Form the second insulating barrier；
（3）Formed after the second insulating barrier, keep 120-150 DEG C of cable surface temperature, squeezed into the 3rd extrusion molding section, the 3rd
Go out profiled section and form elastic layer in the second surface of insulating layer；The material of elastic layer is polyvinyl chloride and polyurethane compound, wherein
Add 0.01-0.3% foaming agents；
（4）After elastic layer is formed, by the 4th extrusion molding section, shell structurre is formed；Cable continuous moving is to infrared heating
In stove, the radiant heating 10-15 seconds, then air-cooled to less than 80 DEG C, room temperature is naturally cooled to, obtains cable.
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| CN201710838536.4A CN107622829B (en) | 2017-09-18 | 2017-09-18 | A method of preparing novel cable |
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| CN201710838536.4A CN107622829B (en) | 2017-09-18 | 2017-09-18 | A method of preparing novel cable |
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| CN107622829B CN107622829B (en) | 2019-06-28 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109102945A (en) * | 2018-09-11 | 2018-12-28 | 台山市电缆厂有限责任公司 | A kind of cable and preparation method thereof |
| CN116435028A (en) * | 2023-04-25 | 2023-07-14 | 云南巨力电缆股份有限公司 | Long-life low-smoke flame-retardant electric wire and preparation process thereof |
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| CN109102945A (en) * | 2018-09-11 | 2018-12-28 | 台山市电缆厂有限责任公司 | A kind of cable and preparation method thereof |
| CN116435028A (en) * | 2023-04-25 | 2023-07-14 | 云南巨力电缆股份有限公司 | Long-life low-smoke flame-retardant electric wire and preparation process thereof |
| CN116435028B (en) * | 2023-04-25 | 2023-11-17 | 云南巨力电缆股份有限公司 | Long-life low-smoke flame-retardant electric wire and preparation process thereof |
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| CN107622829B (en) | 2019-06-28 |
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