CN106297984A - Long-life cable and manufacture method thereof - Google Patents
Long-life cable and manufacture method thereof Download PDFInfo
- Publication number
- CN106297984A CN106297984A CN201610738156.9A CN201610738156A CN106297984A CN 106297984 A CN106297984 A CN 106297984A CN 201610738156 A CN201610738156 A CN 201610738156A CN 106297984 A CN106297984 A CN 106297984A
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- China
- Prior art keywords
- insulating layer
- cable
- inner insulating
- long
- external insulation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- H01B7/02—Disposition of insulation
- H01B7/0208—Cables with several layers of insulating material
- H01B7/0216—Two layers
-
- 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
-
- 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
- H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
-
- 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
- H01B13/148—Selection of the insulating material therefor
-
- 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
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses long-life cable and manufacture method thereof, cable includes copper or the conductor of aluminum strand system, and the insulating barrier being coated on outside conductor, described insulating barrier includes inner insulating layer, external insulation layer, described inner insulating layer uses crosslinked polyethylene, and external insulation layer uses the TPO of low-smoke non-halogen flame-retardant；Described inner insulating layer is melted with external insulation layer to be connected.Its manufacture method includes the manufacture of conductor；Inner insulating layer, the extrusion moulding of external insulation layer.The cable ageing resistance of this case is strong, length in service life, good insulating, nontoxic, safety is high, and product range is wide；The manufacture method production efficiency of this case is high, energy-conserving and environment-protective.
Description
Technical field
The present invention relates to technical field of electric wires and cables, particularly to length in service life, the long-life cable of good insulating and
Its manufacture method.
Background technology
Traditional architecture electric wire uses monolayer polyvinyl chloride insulation, has the disadvantage in that operating temperature (70 DEG C) and short circuit
Temperature (160 DEG C) is low, the most aging, only 20-30 service life under regular service conditions, such as exist in using over loading or
Extreme climate situation is the most shorter for then service life.In recent years, increase year by year owing to the fire incident of the aging initiation of electrical wiring has
Trend, traditional architecture with electric wire be badly in need of upgrading.
Additionally due to polyvinyl chloride insulation is polar material, insulation resistance is the highest and easy moisture absorption, and electric wire once makes moist, easily
Produce electric leakage, even lead to a disaster；Also can produce a large amount of toxic and harmful, smog during polychloroethylene insulation material burning, give
Personal safety and property cause the biggest threat.Therefore exploitation is Tong Bu with Building life cycle, and green, the long-life electricity of environmental protection
Line, is effectively reduced the Probability of fire incident because of the aging initiation of electric wire, significant.
Summary of the invention
It is high, nontoxic that the technical problem to be solved in the present invention is to provide length in a kind of service life, good insulating, safety
Long-life cable and manufacture method.
In order to solve above-mentioned technical problem, the technical scheme is that
Twist the conductor of system, and the insulating barrier being coated on outside conductor including copper or aluminum, described insulating barrier include interior absolutely
Edge layer, external insulation layer, described inner insulating layer uses crosslinked polyethylene, and external insulation layer uses the thermoplastic polyolefin of low-smoke non-halogen flame-retardant
Hydrocarbon；Described inner insulating layer is melted with external insulation layer to be connected.
Further, described inner insulating layer and external insulation layer gross thickness are not less than 0.6mm, and wherein the thickness of inner insulating layer is
The 25%～50% of gross thickness.
Further, described inner insulating layer electrical conductivity≤10 μ S/mm, external insulation layer content of halogen≤0.1%.
The manufacture method of long-life cable, including following sequence step:
A, the manufacture of conductor: copper core or thread core of aluminum made layering by wire twisting machine, repeatedly, reversely restraints stranded leading
Body；
B, inner insulating layer, the extrusion moulding of external insulation layer: inner insulating layer and external insulation layer are by using double-layer coextrusion to process
System by unwrapping wire, tensioning, preheating, extrusion molding gluing, cool down, receive winding displacement working procedure processing molding；
C, inner insulating layer cross moulding: molding cable step b obtained is by chemical crosslinking molding.
Further, the temperature of described extrusion molding gluing is 120 DEG C～220 DEG C.
Further, the temperature of described extrusion molding gluing is 180 DEG C.
Further, described chemical crosslinking is crosslinked with silicane.
Further, described crosslinked with silicane is by molding cable at room temperature natural storage 72h～120h；Or at 80 DEG C～
90 DEG C of hot water deposit 1h～4h；Or deposit 1h～4h in≤0.1MPa water vapour.
Further, described crosslinked with silicane is by molding cable at room temperature natural storage 72h～120h.
Use technique scheme, owing to using inner insulating layer and the low-smoke non-halogen flame-retardant of the polythene material of crosslinking
The external insulation layer of TPO, use melted mode to make inner insulating layer be connected with external insulation layer so that the present invention has
The operating temperature of the polyvinyl chloride insulation layer existence that effect improves monolayer in prior art is low and the oldest with short circuit temperature
Change, the technical problems such as harmful substance such as service life is short, insulating properties is bad, Halogen.Insulation system of the present invention is double layer of insulation,
Using double-layer coextrusion in technique, inside and outside insulating barrier is once extruded simultaneously, it is to avoid monolayer extrusion insulation composition surface mixes dust, water
Point or the impurity such as gas and affect properties of product, composition surface is tightly combined gapless, makes product electric property more stable, aging resistance
Property is relatively reliable, it is ensured that the advantage perfect adaptation of bi-material.Inner insulating layer is the non-hygroscopic crosslinked polyethylene of high-performance, it is ensured that produce
The electrical property of product.External insulation layer is low smoke and zero halogen cross-linked polyolefin, it is ensured that product has combustion characteristics and the mechanical performance of brilliance.
External insulation layer uses the TPO of low-smoke non-halogen flame-retardant to improve the ageing-resistant performance of material, creep resistance greatly
Energy, environment resistant cracking performance, thermal deformation resistant performance and mechanical performance, be effectively ensured and extend the service life of electric wire.This
Bright cable be applicable to home dwelling finishing, a class fire proof construction, important public place and personnel concentrate place power supply and
Control circuit.
Accompanying drawing explanation
Fig. 1 is construction of cable schematic diagram of the present invention；
Fig. 2 is double-layer coextrusion system of processing schematic diagram of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.At this it should be noted that for
The explanation of these embodiments is adapted to assist in and understands the present invention, but is not intended that limitation of the invention.Additionally, it is disclosed below
As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and just can be mutually combined.
As shown in Figure 1, long-life cable include copper or aluminum strand system conductor 1, and be coated on outside conductor 1 interior
Insulating barrier 2 and external insulation layer 3, be embodied as middle inner insulating layer 2 use cross-linking polyethylene materials, external insulation layer 3 use low cigarette without
The TPO that halogen is fire-retardant；Inner insulating layer 2 uses melted connection with external insulation layer 3.
Technique scheme, due to the inner insulating layer 2 of polythene material of crosslinking used and low-smoke non-halogen flame-retardant
TPO external insulation layer 3, inner insulating layer 2 defines dimensional network structure, the thermoplastic of external insulation layer 3 low-smoke non-halogen flame-retardant
Property polyolefin can be effectively increased inner insulating layer 2 and the thermostability of external insulation layer 3, reduces relative thermal elongation percentage, improves product
Product aging-resistant ability.Reduce hygroscopicity simultaneously, improve insulating properties；Content of halogen in material is low, it is achieved that nontoxic
Harmless.
In order to improve cable ageing resistance, heat resistance, insulating properties and safety further, inner insulating layer 2 and outer absolutely
Edge layer 3 gross thickness is not less than 0.6mm, and wherein the thickness of inner insulating layer 2 is the 25%～50% of gross thickness.This case is embodied as
In, the thickness of inner insulating layer 2 is the 40% of gross thickness.Electrical conductivity≤10 μ the S/mm of inner insulating layer 2, external insulation layer 3 content of halogen
≤ 0.1%；Being embodied as the electrical conductivity 6 μ S/mm of middle inner insulating layer 2, external insulation layer 3 content of halogen is 0.08%.
The manufacture method of long-life cable, including following sequence step:
A, the manufacture of conductor: copper core or thread core of aluminum made layering by wire twisting machine, repeatedly, reversely restraints stranded leading
Body；
B, inner insulating layer, the extrusion moulding of external insulation layer: inner insulating layer and external insulation layer are by using double-layer coextrusion to process
System by unwrapping wire, tensioning, preheating, extrusion molding gluing, cool down, receive winding displacement working procedure processing molding；
C, inner insulating layer cross moulding: molding cable step b obtained is by chemical crosslinking molding.
As shown in Figure 2, this case is embodied as the double-layer coextrusion system of processing of middle employing and includes actinobacillus device 4, tensioning dress
Put 5, preheating device 6, plastic extruder 7, automatic feeding device 8, mould 9, chiller 10, meter counter 11, traction wheel
12, winding and arranging device 13, in implementation process, now preheat plastic extruder 7, and by automatic feeding device 8 to plastic extrusion
Machine 7 adds polyethylene, the TPO of low-smoke non-halogen flame-retardant.In being embodied as, the temperature of plastic extruder 7 reaches
120 DEG C～220 DEG C, it is 180 DEG C that this case is embodied as middle plastic extruder 7 temperature.And use traction wheel 12 to be incited somebody to action by pull rope
The conductor 1 that copper core or thread core of aluminum make layering, repeatedly, reversely bundle is stranded arrives molding through tensioner 5 and preheating device 6
Mould 9.Conductor 1 effectively eliminates the internal stress of conductor when by preheating device 6, increases percentage elongation and improves flexibility, carrying
The Overmolded effect of high gluing.
In extrusion, polyethylene in automatic feeding device 8, the TPO of low-smoke non-halogen flame-retardant are by weight
Power or charging are threaded in the machine barrel of plastic extruder 7, under the thrust of plastic extruder 7 rotary screw, constantly to
Front propelling, starts gradually to move to homogenizing zone from preheating section.Meanwhile, the TPO of polyethylene, low-smoke non-halogen flame-retardant
By the stirring of screw rod and the squeezing action of plastic extruder 7, and the shearing between the exterior-heat and plastics and equipment of machine barrel
It is changed into melted fluidised form under the effect of friction, the screw channel of plastic extruder 7 is formed the stream of continuous uniform.In the temperature set
Under degree effect, polyethylene, low-smoke halogen-free polyolefin are changed into the plastic object of molten condition from solid state, then squeeze via plastics
Go out promotion or the stirring of machine 7 screw rod, the TPO of the polyethylene plastified completely, low-smoke non-halogen flame-retardant is pushed machine
Head.Annular gap through between the core rod and die sleeve of mould 9 again, extrudes from die sleeve mouth, makes the polyethylene of molten condition, low
The TPO of cigarette halogen-free flameproof is under high pressure coated on conductor 1 around, forms the most closely knit inner insulating layer 2 or outer
Insulating barrier 3, then cool down through apparatus for supercooling 10 and solidify, form cable.Between chiller 10 and traction wheel 12, meter is set
Rice device 11, effectively calculates cable length, and by being realized the winding displacement of extrusion moulding cable by winding and arranging device 13, winding folding and unfolding exists
On take-up reel.
And by cable at room temperature natural storage 72h～120h good for folding and unfolding；Or deposit 1h at 80 DEG C～90 DEG C of hot water
～4h；Or deposit 1h～4h in≤0.1MPa water vapour.This case is embodied as middle employing at room temperature natural storage 100h.
The crosslinked with silicane principle that the present invention uses:
Crosslinked with silicane is the one of chemical crosslinking, and usual crosslinkable silane is associated with the multiple sides such as two-step method, one-step method and copolymerization method
Method.But chemical reaction is essentially identical, its chemical reaction process approximately as:
A) initiator DCP resolves into free radical
B) under the triggering of DCP, attract the hydrogen on ethylene chain, make polyethylene molecular chain generate free radical (also referred to as dehydrogenation
Reaction)
···——CH2——CH2——CH2——···+
···——CH2——CH2——CH2——···+
C) grafted polyethylene is generated
Free radical grafting agent is as a example by A151 (vinyl front three cyanoalkysilane):
Generate grafted polyethylene and connect the branch chain containing siloxy group
D) hydrolytic condensation generates silanol, eventually forms whole silane molecule and receives polyethylene alkene chain up.There are two kinds of reactions
Mechanism:
From reaction equation above it can be seen that crosslinked with silicane reaction is as general chemical crosslinking, DCP decomposes, at polyethylene
Upper formation contact.Owing to silane is with polycthylene grafted, the crosslinking of further conventional chemical is prevented from, and contact is from Polyethylene Chain simultaneously
On move on on silane molecule.When silane molecule draws a H atom on other polyethylene, thus play the biography of grafting further
Broadcast effect.This process constantly repeats, until big silane molecule is grafted to Polyethylene Chain up.The method has only on a small quantity
DCP is to cause first contact, thus causes grafting chain reaction (as with 1.5 parts of silane, used about DCP0.1 part).
The maximum temperature of grafting is about 200 DEG C.
The polyethylene being grafted is still thermoplastic, it is easy to extruded by common extruding machine.When adding in grafted silane
When entering hydrone, chemical change starts, and has inhaled the oxygen in water and has formed hydrolysis.
The most general catalyst is dibutyl tin laurate ester (DBDTL), at dibutyl tin laurate ester (DBDTL)
Under the catalyst of (Dibutyl tin dilaurate), it is condensed into crosslinked polyethylene.The time of hydrolysis and condensation is because of the insulation of cable
Thickness is different and different.When cable is immersed in 80 DEG C of water, after 1～6kV cable needs 4～5 hours, 10～20kV cables then need
After wanting 10～20 hours, up to more than 70% degree of cross linking.
The outstanding advantages of silane crosslinking technology is not limited by crosslinking time in extrusion line, can make full use of extruder
Extrusion capacity and reach the highest linear velocity, medium O. cable line is up to about 50m/min speed. the required crosslinking of crosslinked with silicane
Agent DCP is the fewest, to preventing from producing in insulation space, improves its electric property and is beneficial to.
Specific implementation process of the present invention use one-step method (refer to Silane Grafted and the one step completed side of extrusion molding
Method.).In one-step technology, a, b, c three-step reaction completes during insulating exruded, four-step reaction depositing the most after the extrusion
Complete during putting.
Above in association with accompanying drawing, embodiments of the present invention are explained in detail, but the invention is not restricted to described enforcement
Mode.For a person skilled in the art, in the case of without departing from the principle of the invention and spirit, to these embodiments
Carry out multiple change, revise, replace and modification, still fall within protection scope of the present invention.
Claims (9)
1. long-life cable, twists the conductor of system, and the insulating barrier being coated on outside conductor including copper or aluminum, it is characterised in that
Described insulating barrier includes inner insulating layer, external insulation layer, and described inner insulating layer uses crosslinked polyethylene, and external insulation layer uses low cigarette
The TPO of halogen-free flameproof；Described inner insulating layer is melted with external insulation layer to be connected.
Long-life cable the most according to claim 1, it is characterised in that described inner insulating layer and external insulation layer gross thickness are not
Less than 0.6mm, wherein the thickness of inner insulating layer is the 25%～50% of gross thickness.
Long-life cable the most according to claim 2, it is characterised in that described inner insulating layer electrical conductivity≤10 μ S/mm, outward
Insulating barrier content of halogen≤0.1%.
4. the manufacture method of long-life cable, it is characterised in that: include following sequence step:
A, the manufacture of conductor: copper core or thread core of aluminum made layering by wire twisting machine, repeatedly, reversely restraints stranded conductor；
B, inner insulating layer, the extrusion moulding of external insulation layer: inner insulating layer and external insulation layer are by using double-layer coextrusion system of processing
By unwrapping wire, tensioning, preheating, extrusion molding gluing, cool down, receive winding displacement working procedure processing molding；
C, inner insulating layer cross moulding: molding cable step b obtained is by chemical crosslinking molding.
The manufacture method of long-life cable the most according to claim 4, it is characterised in that: the temperature of described extrusion molding gluing is
120 DEG C～220 DEG C.
The manufacture method of long-life cable the most according to claim 5, it is characterised in that: the temperature of described extrusion molding gluing is
180℃。
The manufacture method of long-life cable the most according to claim 6, it is characterised in that: described chemical crosslinking is crosslinkable silane
Connection.
The manufacture method of long-life cable the most according to claim 7, it is characterised in that: described crosslinked with silicane is by molding
Cable at room temperature natural storage 72h～120h；Or deposit 1h～4h at 80 DEG C～90 DEG C of hot water；Or at≤0.1MPa water vapour
In deposit 1h～4h.
The manufacture method of long-life cable the most according to claim 8, it is characterised in that: described crosslinked with silicane is by molding
Cable at room temperature natural storage 72h～120h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738156.9A CN106297984A (en) | 2016-08-27 | 2016-08-27 | Long-life cable and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610738156.9A CN106297984A (en) | 2016-08-27 | 2016-08-27 | Long-life cable and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106297984A true CN106297984A (en) | 2017-01-04 |
Family
ID=57677978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610738156.9A Pending CN106297984A (en) | 2016-08-27 | 2016-08-27 | Long-life cable and manufacture method thereof |
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| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782893A (en) * | 2017-01-18 | 2017-05-31 | 重庆鸽牌电线电缆有限公司 | A kind of manufacture method of high-performance high life electric wire |
| CN106847425A (en) * | 2017-01-18 | 2017-06-13 | 重庆鸽牌电线电缆有限公司 | A kind of manufacture method of high-performance environment-friendly home improvement wire |
| CN115132407A (en) * | 2022-08-10 | 2022-09-30 | 南京全信传输科技股份有限公司 | Polar marine low temperature resistant oil resistant halogen free flame retardant flexible cable and preparation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148522A (en) * | 2007-10-29 | 2008-03-26 | 浙江万马高分子材料股份有限公司 | Technique for manufacturing natural crosslinking polyethylene-insulated cable material |
| US20110174521A1 (en) * | 2010-01-15 | 2011-07-21 | Servicios Condumex S.A. De Cv | Flame retardant, low smoke emission, halogen free 600 V energy cable with polyolefin insulation and polyamide jacket |
| CN105304167A (en) * | 2015-11-03 | 2016-02-03 | 昆明电立电缆有限公司 | Long-life double-layer wire and manufacturing method thereof |
-
2016
- 2016-08-27 CN CN201610738156.9A patent/CN106297984A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101148522A (en) * | 2007-10-29 | 2008-03-26 | 浙江万马高分子材料股份有限公司 | Technique for manufacturing natural crosslinking polyethylene-insulated cable material |
| US20110174521A1 (en) * | 2010-01-15 | 2011-07-21 | Servicios Condumex S.A. De Cv | Flame retardant, low smoke emission, halogen free 600 V energy cable with polyolefin insulation and polyamide jacket |
| CN105304167A (en) * | 2015-11-03 | 2016-02-03 | 昆明电立电缆有限公司 | Long-life double-layer wire and manufacturing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782893A (en) * | 2017-01-18 | 2017-05-31 | 重庆鸽牌电线电缆有限公司 | A kind of manufacture method of high-performance high life electric wire |
| CN106847425A (en) * | 2017-01-18 | 2017-06-13 | 重庆鸽牌电线电缆有限公司 | A kind of manufacture method of high-performance environment-friendly home improvement wire |
| CN115132407A (en) * | 2022-08-10 | 2022-09-30 | 南京全信传输科技股份有限公司 | Polar marine low temperature resistant oil resistant halogen free flame retardant flexible cable and preparation method |
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Application publication date: 20170104 |