CN107845452A - A kind of method that electric wire is manufactured using cross-linking radiation fluorubber - Google Patents
A kind of method that electric wire is manufactured using cross-linking radiation fluorubber Download PDFInfo
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- CN107845452A CN107845452A CN201710880014.0A CN201710880014A CN107845452A CN 107845452 A CN107845452 A CN 107845452A CN 201710880014 A CN201710880014 A CN 201710880014A CN 107845452 A CN107845452 A CN 107845452A
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- linking radiation
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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
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/148—Selection of the insulating material therefor
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- Processes Specially Adapted For Manufacturing Cables (AREA)
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Abstract
The invention provides a kind of method that electric wire is manufactured using cross-linking radiation fluorubber, it comprises the following steps：S1, each component needed for cross-linking radiation fluorubber is kneaded post-processing it is shaped to sheet material, carries out triangle bag clot processing；S2, the cross-linking radiation fluorubber after processing is sent in barrel cured；S3, the cross-linking radiation fluorubber after curing extruded by extrusion die, be enclosed in around copper cash, is cooled and shaped；S4, the cross-linking radiation fluorubber insulating barrier electric wire of extrusion irradiated using high-energy electron accelerator, cross-linking radiation electric wire is made.According to method provided by the invention, crosslinked fluororubber process without high temperature, without steam, it is environmentally safe, it is easy to accomplish mass production, production wire length it is unrestricted；Obtained cross-linking radiation electric wire have excellent electrical properties, high-low temperature resistant, it is non-aging, from fiery self-extinguishment the characteristics of, substantially increase the security performance and service life of electric wire, the application of electric wire is wider.
Description
Technical field
The present invention relates to a kind of method that electric wire is manufactured using cross-linking radiation fluorubber.
Background technology
At present, the application of electric wire is more and more extensive, existing wire cable insulating layer generally use PVC material
It is made, but PVC material is easy to aging, fire resistance is not high, and high and low temperature resistance is poor, the failure of insulating layer material, easily leads
Send a telegraph the frequent generation of gas fire incident.
Fluorubber (Fluorelastomer) refers to the synthesis macromolecule containing fluorine atom on the carbon atom of main chain or side chain
Elastomer.Because C-F bond energys are big (every mole of 485kJ), and fluorine atom covalent radius is 0.064nm, equivalent to C-C bond distance's
Half, therefore fluorine atom can well shield C-C main chains, ensure that the stability of C-C chains, make it have other
The incomparable excellent properties of rubber, such as high temperature resistant, oil resistant, chemical resistance, good physical and mechanical properties and weather-proof
Property, electrical insulating property and radiation resistance etc., its combination property is optimal in all synthetic rubber, is commonly called as " rubber king ".
Existing fluorubber poor processability, easily occur situations such as tear fracture, serious shadow in process of manufacture
Ring use range.During concrete application, the compounding ingredient that different component is added generally on the basis of fluorubber changes or arranged again
Arrange different molecular combinations and realize specific performance.Manufactured fluorubber is widely used to modern Aviation, led by this way
The sophisticated technologies such as bullet, rocket, space travel, naval vessels, atomic energy and automobile, shipbuilding, chemistry, oil, telecommunication, instrument, machinery etc.
Industrial circle.
When tradition is using PVC material manufacture electric wire insulation layer, it is enclosed in after generally PVC material is melted around electric wire, its
Simple production process.But fluorubber product is molded solid state gelatineous body, can cause its performance change after its high temperature melt,
No longer there is every good performance.
It there is now indivedual manufacturers and use fluorubber processing and fabricating electric wire insulation layer, it passes through peroxide bis-phenol or polyhydroxy
Compound is made after being kneaded with crude fluororubber, and then fluorubber electric wire is placed in HTHP power vulcanizing oven and vulcanized
Shaping.When being processed using the method, vulcanizing oven, which often vulcanizes, is once made one section of electric wire, and the length of every section of electric wire is by the big of vulcanizing oven
Small decision, generally every section of wire length is not more than 100 meters every time, therefore can not carry out batch continuous production；Also, it is sulfided into
Type it is big for up to 12 ￣ 24 hours, power consumption power consumption；Sulfidation can cause the materials such as vulcanizing agent to remain, and easily human body is made
Into influence and environment is polluted；Using HTHP vulcanizing oven, potential safety hazard is big, higher to equipment requirement, equipment body
Product is big, and input cost is big.Therefore, not yet fluorubber is widely used in manufacturing in electric wire at present.
Therefore, how to provide it is a kind of can batch continuous production, production process it is environmentally safe use fluorubber system
The method of manufacturing electric wire, which becomes industry, to be needed to solve the problems, such as.
The content of the invention
In view of the shortcomings of the prior art, electric wire is manufactured using cross-linking radiation fluorubber it is an object of the invention to provide a kind of
Method, its production process will not pollute to environment, it is easy to accomplish high-volume continuous production, production electric wire are without length limitation；
Electric wire made from production has preferable ageing-resistant performance, high and low temperature resistance.
To achieve these goals, the invention provides it is a kind of using cross-linking radiation fluorubber manufacture electric wire method, its
Comprise the following steps：
S1, each component needed for cross-linking radiation fluorubber is kneaded post-processing it is shaped to sheet material, carries out triangle bag clot processing,
Tabletting is cut；
S2, the cross-linking radiation fluorubber after step S1 processing is sent in barrel and cured；
S3, by step S2 cure after cross-linking radiation fluorubber extruded by extrusion die, be enclosed in around copper cash, by it
It is cooled and shaped；
S4, the cross-linking radiation fluorubber insulating barrier electric wire extruded in step S3 is subjected to spoke by high-energy electron accelerator
According to obtained cross-linking radiation electric wire.
The method provided by the invention that electric wire is manufactured using cross-linking radiation fluorubber is applied to manufacture electric wire insulation layer and electricity
Cable insulating barrier.
The present invention is kneaded by adding the crosslinking agent of certain component in crude fluororubber, obtained cross-linking radiation fluorine
Rubber, using saltant type screw rod, cross-linking radiation fluorubber is sent in barrel and cured, strengthen the extruding of cross-linking radiation fluorubber
Power, increase the density of cross-linking radiation fluorubber insulating barrier, avoid the electric wire electric wire electric leakage of production, the phenomenon easily punctured, improve electricity
The security performance of line, it is enclosed in by extrusion die extrusion around copper cash, uses high-energy electron accelerator spoke after cooling and shaping again
According to, crosslinking agent is played a role, improve electric wire intensity, ageing-resistant performance and the high and low temperature resistance of electric wire, its high temperature resistant 200
DEG C, low temperature resistant -40 DEG C.
The method of cross-linking radiation fluorubber manufacture electric wire provided by the invention, which solves, to be industrially difficult to fluorubber application
In the problem of production electric wire, its crosslinked fluororubber process without high temperature, without steam, while improving electric wire electric property to environment without
Pollution, production equipment input is low, environmentally safe, it is easy to accomplish automation and digital control, progress high-volume continuous production,
The wire length of production is unrestricted.By cross-linking radiation electric wire made from method provided by the invention have excellent electrical properties,
High-low temperature resistant, it is non-aging, from fiery self-extinguishment the characteristics of, greatly increase the security performance and service life of electric wire so that electricity
The application of line is wider.
According to another embodiment of the present invention, when cross-linking radiation fluorubber is kneaded in step S1, successively by middle decile
Son amount cross-linking radiation crude fluororubber (M：More than 200000), low molecule amount cross-linking radiation crude fluororubber (M：Less than 100000), remove
Sour agent, releasing agent, filler acid-acceptor, crosslinking agent are added in double rod mills, and clot is thin logical 3-12 times respectively；
Cross-linking radiation fluorubber based on 100 parts by weight, each component mass fraction of addition are：
Intermediate molecular weight cross-linking radiation crude fluororubber, 70-100 parts；
Low molecule amount cross-linking radiation crude fluororubber 0-0 parts；
Plumper 4-7 parts；
Releasing agent 1-2 parts；
Filler acid-acceptor 25-35 parts；
Crosslinking agent 3-6 parts.
Fluorubber insulating barrier each component and mass fraction provided by the invention, it is the group by a large amount of different quality numbers
Divide material cross-linking radiation fluororubber compounded rubber prepared by processing, electric wire insulation layer or restrictive coating are manufactured, to electric wire insulation layer or shield
Jacket layer carries out properties experiment test, is acquired further according to substantial amounts of test data of experiment.
Its Experimental Testing Procedures is as follows：
1st, from the copper cash of 1.0mm diameters, it is 3.0mm ± 0.05 that external diameter, which is made, the cross-linking radiation of irradiated crosslinking
Fluorubber electric wire, obtained cross-linking radiation electric wire is divided into some sections, the experiment test for different parameters.
2nd, the weight and volume of one section of (5m) electric wire are measured, then is placed the wires in the solution of diesel oil, dimethylbenzene each 50%
Immersion 24 hours, weight and volume after its immersion are measured, calculate its immersion front and rear Volume Changes and weight loss；Volume becomes
Change≤10%, mass loss≤0.02% requires for satisfaction.
3rd, the insulating barrier of electric wire is extracted, using tensiometer, measures tensile strength and elongation before insulating barrier aging；Again will
Electric wire insulation layer is positioned over high temperature ageing case, and continuous ageing 168 hours, room temperature tests it in 24 hours after taking out aged samples
Elongation and tensile strength, calculate it and change retention rate.(according to different high temperature resistant grades, adjust the aging of high temperature ageing case
Temperature：150 DEG C of electric wire aging temperatures are 200 DEG C ± 2 DEG C, and 180 DEG C of electric wire aging temperatures are 215 DEG C ± 2 DEG C, and 200 DEG C of electric wires are old
It is 232 DEG C ± 2 DEG C to change temperature, and 220 DEG C of electric wire aging temperatures are 250 DEG C ± 2 DEG C.)
4th, after taking one section 5 meters of electric wire to soak 2 hours, proof voltage test is carried out, when at least 18KV/1min does not puncture, symbol
Close and require.
5th, according to different low temperature resistant grades, take 5 meters of long electric wires to be positioned in refrigerator, take out, see whether after 24 hours
Cracking modification.(- 50 DEG C of electric wire aging temperatures are -55 DEG C ± 5 DEG C；- 40 DEG C of electric wire aging temperatures are -45 DEG C ± 5 DEG C；-
30 DEG C of electric wire aging temperatures are -35 DEG C ± 5 DEG C；- 20 DEG C of electric wire aging temperatures are -25 DEG C ± 5 DEG C.)
6th, tested according to the resistance to fire resistance standard method of UL cables, its fire resistance meets VW-1 requirements.
7th, insulating resistance value of the electric wire at 20 DEG C, insulating resistance value >=1x10 are tested5MΩ.km。
According to another embodiment of the present invention, when cross-linking radiation fluorubber is kneaded, control roller temperature is below 75 °.Keep away
Exempt to cause fluorubber to cure in advance because temperature is too high, be subsequently difficult to continue to process.
According to another embodiment of the present invention, in step S1, the thickness of cross-linking radiation fluorubber sheet material is 3-7mm,
Width is 30-50mm.Cross-linking radiation fluorubber is the rubber bodies of shaping, and slitting shape is convenient to send cross-linking radiation fluorubber
Enter into screw channel, its density of material keeps certain uniformity.
According to another embodiment of the present invention, when cross-linking radiation fluorubber being sent into barrel curing in step S2,
Screw feeding is carried out using saltant type screw rod, screw compression is than 3.0 ￣ 4.5, draw ratio 1：25.Saltant type screw rod includes multistage
The screw rod that screw diameter, spiral groove depth, pitch differ, can be during feeding using saltant type screw spiral feeding
Certain extruding force is progressively imposed to cross-linking radiation fluorubber to extrude, so as to strengthen cross-linking radiation fluorine rubber in electric wire insulation layer
The density of glue, prevent the electric leakage during electric wire use and breakdown phenomenon.
According to another embodiment of the present invention, the temperature of saltant type screw rod uses two-stage temperature control, saltant type spiral shell
Bar is provided with three areas that three sections of screw diameters, spiral groove depth, pitch differ, and the temperature in three areas is：One area 70-160
DEG C, two 80-170 DEG C of areas, three 100-180 DEG C of areas.
Being heated by wise temperature, the cross-linking radiation fluorubber to each section of specific spiral groove depth applies required temperature,
Ensure that it cures the performance that cross-linking radiation fluorubber is not interfered with while shaping, it is ensured that the stabilization of its performance.
According to another embodiment of the present invention, the extrusion die in step S3 includes die sleeve and core rod, and core rod is leakage
Bucket shape, die sleeve are the shell of cylinder, front end provided with planar projections, and the hollow hole that can accommodate core rod, die sleeve are provided with die sleeve
It is enclosed on outside core rod, core rod passes through copper cash.Cross-linking radiation fluorubber is squeezed again by cylindrical die sleeve again after passing through core rod
Pressure, increase the extruding force of cross-linking radiation fluorubber insulating barrier, improve insulating barrier density, so as to further improve wire products matter
Amount.
According to another embodiment of the present invention, the extrusion temperature of extrusion die is 105 DEG C -200 DEG C, extruded velocity
For 20-160m/min, the thickness of cladding cross-linking radiation fluorubber insulating layer material is 0.20-3.5mm.
According to another embodiment of the present invention, further comprise step S31 after the completion of step S3：Irradiation will be surrounded to hand over
The electric wire for joining fluorubber insulating barrier carries out vacuum pumping.The electric wire for being wrapped with cross-linking radiation fluorubber insulating barrier is further taken out very
Vacancy is managed, and is advantageous to wrap up tighter between insulating barrier and copper cash, is improved the quality of wire products.
According to another embodiment of the present invention, high-energy electron accelerator carries out the parameter of cross-linking radiation in step S4
For：Beam pressure 1.0-1.5MeV, line 5-70mA, dosage 20-100kGy, speed 40-500m/min.
Compared with prior art, the present invention possesses following beneficial effect：
1st, the present invention is by crude fluororubber, adding the acidic materials inside plumper removing rubber；Add filler
Acid-acceptor improves mechanical performance, fire resistance, electric property and the ageing resistace of fluorubber；Crosslinking agent and releasing agent are added,
Later stage carries out cross-linking radiation so as to strengthen the intensity of cross-linking radiation fluorubber, ageing-resistant performance, high and low temperature resistance again.
2nd, the present invention reuses high-energy electron accelerator after shaping and entered by adding crosslinking agent, electric wire in crude fluororubber
Row irradiation carries out cross-linking radiation, its cross-linking process without high temperature, without steam, to environment without dirt while improving electric wire electric property
Dye, it is easy to accomplish mass production.
3rd, the present invention makes electric wire insulation layer by cross-linking radiation fluorubber, and the electric wire for producing to obtain has electric property excellent
Good, high-low temperature resistant, it is non-aging, from fiery self-extinguishment the characteristics of, greatly increase the electric property, security performance and use of electric wire
Life-span so that the application of electric wire is wider.
The present invention is described in further detail below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the method flow diagram of the cross-linking radiation fluorubber manufacture electric wire of embodiment 1；
Fig. 2 is the structural representation of the saltant type screw rod of embodiment 1；
Fig. 3 is the mold insert structure schematic diagram of the extrusion die of embodiment 1；
Fig. 4 is the die sleeve structure schematic diagram of the extrusion die of embodiment 1；
Fig. 5 is the die sleeve and core rod assembling schematic diagram of the extrusion die of embodiment 1.
Embodiment
Embodiment 1
A kind of method that electric wire is manufactured using cross-linking radiation fluorubber is present embodiments provided, as shown in figure 1, it is included such as
Lower step：
S1, each component needed for cross-linking radiation fluorubber is kneaded post-processing it is shaped to sheet material, carries out triangle bag clot processing；
When cross-linking radiation fluorubber is kneaded, successively by intermediate molecular weight cross-linking radiation crude fluororubber (M：More than 200000),
Low molecule amount cross-linking radiation crude fluororubber (M：Less than 100000), plumper, releasing agent, filler acid-acceptor, crosslinking agent add double
In rod mill, clot is thin logical 3-12 times respectively；
Cross-linking radiation fluorubber based on 100 parts by weight, each component mass fraction of addition are：
Intermediate molecular weight cross-linking radiation crude fluororubber, 70-100 parts；
Low molecule amount cross-linking radiation crude fluororubber, 0-30 parts；
Plumper 4-7 parts；
Releasing agent 1-2 parts；
Filler acid-acceptor 25-35 parts；
Crosslinking agent 3-6 parts.
The acidic materials added in rubber inside plumper removing rubber, add the machinery that filler acid-acceptor improves fluorubber
Performance, fire resistance, electric property and ageing resistace, add crosslinking agent and releasing agent is easy to the post-production of fluorubber product
Production.According to practical application request, the coloring agent of 1-3 parts can be added.
The each component material and the mass fraction of each component material that the present embodiment provides are to pass through a large amount of different quality numbers
Component material processing prepare cross-linking radiation fluorubber make electric wire, to electric wire carry out senile experiment test, obtain optimal
Each component mass fraction matches.Its ageing-resistant and security performance is verified and ensured.
When cross-linking radiation fluorubber is kneaded, control roller temperature is below 75 °.Avoid causing fluorubber to shift to an earlier date because temperature is too high
Curing, is subsequently difficult to continue to process.
The thickness of cross-linking radiation fluorubber sheet material is 3-7mm, width 30-50mm.Cross-linking radiation fluorubber is shaping
Rubber bodies, slitting shape is convenient to be sent to cross-linking radiation fluorubber in screw channel, and its density of material keeps certain uniform
Property.Handled by triangle bag clot and reduce cross-linking radiation fluorubber and operate the contact area between chopping board, avoid cross-linking radiation
Fluorubber is adhered on operation chopping board and screw rod.
S2, the cross-linking radiation fluorubber after step S1 processing is sent in barrel and cured；
Saltant type screw rod is provided with barrel, referring to Fig. 2, the interior mutation joint according to saltant type screw rod of barrel, it is carried out
Two-stage temperature control, saltant type screw rod are provided with three sections of screw diameters, three areas different with spiral groove depth, and the temperature in three areas is：
One 70-160 DEG C of area, two 80-170 DEG C of areas, three 100-180 DEG C of areas.
Cross-linking radiation fluorubber is sent at the screw channel of saltant type screw rod, spiral is carried out by the rotation of saltant type screw rod
Feeding, cross-linking radiation fluorubber is fed sequentially into three areas of different temperatures, carries out different degrees of curing.Cross-linking radiation fluorine
Rubber is by the screw feeding of saltant type, and screw compression is than 3.0 ￣ 4.5, draw ratio 1：25.Screw channel at its every section screw rod is deep
Spend inconsistent, the thickness of the deeper position cross-linking radiation fluorubber of screw channel is thicker, and the position cross-linking radiation fluorine rubber that screw channel is shallower
The thinner thickness of glue, the degree cured as needed and spiral groove depth, set the temperature required for each area.Avoid temperature mistake
Height causes the curing of cross-linking radiation fluorubber excessive, so as to influence the performance of cross-linking radiation fluorubber, is heated by wise temperature
Mode apply to the cross-linking radiation fluorubber of each section of specific spiral groove depth needed for temperature, will not shadow while ensureing its curing
Ring the performance of cross-linking radiation fluorubber, it is ensured that the stabilization of fluorubber performance.
Between every two sections of screw rods of saltant type screw rod, smoothly transitted at mutation, be not provided with dead angle.Cross-linking radiation fluorubber from
Streamlined extrusion between the screw channel of saltant type screw rod, if rough at mutation, cross-linking radiation fluorubber can be caused to form point
Angle or sharp rib so that form larger bubble or cavity after cross-linking radiation fluorubber extrusion, cause electric wire using when easily hit
Wear or leak electricity.
S3, by step S2 cure after cross-linking radiation fluorubber extruded by extrusion die, be enclosed in around copper cash, by it
It is cooled and shaped；
Referring to Fig. 3 to Fig. 5, extrusion die includes die sleeve 2 and core rod 1, and core rod 1 is infundibulate, and die sleeve 2 is cylindrical, preceding
Shell of the end provided with planar projections 21, die sleeve is interior to be provided with the hollow hole 22 that can accommodate core rod, and die sleeve is enclosed on outside core rod, and core rod is worn
Cross copper cash.Extrusion die is arranged in head 3.
The extrusion temperature of extrusion die is 105 DEG C -200 DEG C, extruded velocity 20-160m/min, coated insulation layer material
The thickness of material is 0.20-3.5mm.
The electric wire for surrounding cross-linking radiation fluorubber insulating barrier is subjected to vacuum pumping.It is exhausted that cross-linking radiation fluorubber will be wrapped with
The electric wire of edge layer further carries out vacuumize process, is advantageous to wrap up tighter between insulating barrier and copper cash, improves wire products
Quality.
S4, the cross-linking radiation fluorubber insulating barrier electric wire extruded in step S3 is subjected to spoke by high-energy electron accelerator
According to obtained cross-linking radiation electric wire.
High-energy electron accelerator carry out cross-linking radiation parameter be：Beam pressure 1.0-1.5MeV, line 5-70mA, dosage
20-100kGy, speed 40-500m/min.
The present embodiment is kneaded by adding the crosslinking agent of certain component in crude fluororubber, obtained cross-linking radiation
Fluorubber, using saltant type screw rod, cross-linking radiation fluorubber is sent in barrel and cured, strengthen squeezing for cross-linking radiation fluorubber
Pressure, increase the density of cross-linking radiation fluorubber insulating barrier, avoid the electric wire electric wire electric leakage of production, the phenomenon easily punctured, improve
The security performance of electric wire, it is enclosed in by extrusion die extrusion around copper cash, uses high-energy electron accelerator after cooling and shaping again
Irradiation, makes crosslinking agent play a role, improves electric wire intensity, ageing-resistant performance and the high and low temperature resistance of electric wire.
Produce obtained electric wire the key technical indexes：Long-term use of temperature representative value：200 DEG C of (maximum applications of -40 DEG C of ￣
- 50 DEG C to 230 DEG C of scope)；High voltage withstanding test >=18KV.ac.50Hz/mm；Tensile strength >=6N/mm before aging2, elongation
Rate >=150%；Tensile strength changes retention rate >=50%, variable elongation retention rate >=25% after aging；Ageing-resistant (the diesel oil of oil resistant
After+dimethylbenzene soak at room temperature 24H) Volume Changes≤10%, mass loss≤0.02%；Fire resistance meets UL VW-1 will
Ask.
Although the present invention is disclosed above with preferred embodiment, the scope that the present invention is implemented is not limited to.Any
The those of ordinary skill in field, it is when a little improvement can be made, i.e., every according to this hair in the invention scope for not departing from the present invention
Bright done equal improvement, should be the scope of the present invention and is covered.
Claims (10)
- A kind of 1. method that electric wire is manufactured using cross-linking radiation fluorubber, it is characterised in that methods described comprises the following steps：S1, each component needed for cross-linking radiation fluorubber is kneaded post-processing it is shaped to sheet material, carries out triangle bag clot processing, tabletting Slitting；S2, the cross-linking radiation fluorubber after step S1 processing is sent in barrel and cured；S3, by the step S2 cure after cross-linking radiation fluorubber extruded by extrusion die, be enclosed in around copper cash, by it It is cooled and shaped；S4, the cross-linking radiation fluorubber insulating barrier electric wire extruded in the step S3 is subjected to spoke by high-energy electron accelerator According to obtained cross-linking radiation electric wire.
- 2. the method as described in claim 1, it is characterised in that when cross-linking radiation fluorubber is kneaded in the step S1, successively By intermediate molecular weight cross-linking radiation crude fluororubber (M：More than 200000), low molecule amount cross-linking radiation crude fluororubber (M：100000 Below), plumper, releasing agent, filler acid-acceptor, crosslinking agent are added in double rod mills, and clot is thin logical 3-12 times respectively；The cross-linking radiation fluorubber based on 100 parts by weight, each component mass fraction of addition are：Intermediate molecular weight cross-linking radiation crude fluororubber, 30-70 parts；Low molecule amount cross-linking radiation crude fluororubber, 0-30 parts；Plumper 4-7 parts；Releasing agent 1-2 parts；Filler acid-acceptor 25-35 parts；Crosslinking agent 3-6 parts.
- 3. method as claimed in claim 1 or 2, it is characterised in that when the cross-linking radiation fluorubber is kneaded, control roller temperature exists Less than 75 °.
- 4. the method as described in claim 1, it is characterised in that in the step S1, the cross-linking radiation fluorubber sheet material Thickness is 3-7mm, width 30-50mm.
- 5. the method as described in claim 1, it is characterised in that be sent to the cross-linking radiation fluorubber in the step S2 When barrel cures, screw feeding is carried out using saltant type screw rod, screw compression is than 3.0 ￣ 4.5, draw ratio 1：25.
- 6. method as claimed in claim 5, it is characterised in that the temperature of the saltant type screw rod uses two-stage temperature control, The saltant type screw rod is provided with three areas that three sections of screw diameters, spiral groove depth, pitch differ, the temperature in three areas For：One 70-160 DEG C of area, two 80-170 DEG C of areas, three 100-180 DEG C of areas.
- 7. the method as described in claim 1, it is characterised in that the extrusion die in the step S3 includes die sleeve and core rod, The core rod is infundibulate, and the die sleeve is the shell of cylinder, front end provided with planar projections, and being provided with the die sleeve to hold Receive the hollow hole of the core rod, the die sleeve is enclosed on outside the core rod, and the core rod passes through copper cash.
- 8. method as claimed in claim 7, it is characterised in that the extrusion temperature of the extrusion die is 105 DEG C -200 DEG C, Extruded velocity is 20-160m/min, and the thickness of cladding cross-linking radiation insulating layer material is 0.20-3.5mm.
- 9. the method as described in claim 1, it is characterised in that further comprise step S31 after the completion of the step S3：Will bag The electric wire for enclosing cross-linking radiation fluorubber insulating barrier carries out vacuum pumping.
- 10. according to the method for claim 1, it is characterised in that high-energy electron accelerator is irradiated in the step S4 The parameter of crosslinking is：Beam pressure 1.0-1.5MeV, line 5-70mA, dosage 20-100kGy, speed 40-500m/min.
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