CN1866411A - Radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable - Google Patents
Radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable Download PDFInfo
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- CN1866411A CN1866411A CN 200610036017 CN200610036017A CN1866411A CN 1866411 A CN1866411 A CN 1866411A CN 200610036017 CN200610036017 CN 200610036017 CN 200610036017 A CN200610036017 A CN 200610036017A CN 1866411 A CN1866411 A CN 1866411A
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Abstract
The invention discloses an insulating wire cable of irradiation cross-linking modified ethane-perfluoroethylene polymer (X-ETFE) with metal screening layer and protecting layer, which is characterized by the following: the insulating thickness is 0.01-0.25 mm, which improves insulating wire heatproof grade; the product satisfies the aviation cable need under kinds of terrible climates.
Description
Technical field
The invention belongs to a kind of insulated wire cable, particularly radiation crosslinking modified ethylene-tetrafluoroethylene (X-ETFE) insulated wire cable used of Aero-Space.
Background technology
At present, the Aero-Space insulated electric conductor of prior art, the ethylene-tetrafluoroethylene polymer that adopt are made insulating barrier more, because technical condition of production technology is reasonable inadequately, its product exists insulating layer thickness, the finished product external diameter is big, the deficiency of can not satisfy that Aero-Space electric wire requirement size is little, in light weight, using etc. under the high mechanical properties, high reliability, all kinds of adverse circumstances of high temperature resistant, anti-various Aero-Space with the extreme complexity of oil.
Summary of the invention
The objective of the invention is to:, propose a kind of radiation crosslinking modified ethylene-tetrafluoroethylene polymer (X-ETFE) insulated wire cable at the deficiencies in the prior art.
Radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable of the present invention, comprise conductor, insulating barrier, woven shield, restrictive coating, it is characterized in that: its radiation crosslinking modified ethylene-tetrafluoroethylene polymer insulation layer thickness is in 0.10～0.25mm scope, single layer designs insulation nominal thickness is in the 0.1-0.15mm scope, and double layer design insulation nominal overall thickness is 0.20～0.25mm scope; Woven shield adopts the flat type copper wire braiding, reduces the electric wire overall dimension, alleviates finished weight; Restrictive coating adopts the radiation crosslinking modified ethylene-tetrafluoroethylene polymer, and thickness is 0.15～0.24mm.Owing to adopt said structure and material, make characteristics such as product has that volume is little, in light weight, mechanical strength is high, safe and reliable, radiation hardness, satisfy aerospace requirement.
Radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable of the present invention, its production comprises, conductor is stranded → insulating exruded → and (stranding → copper cash braid shielded → sheath extrude →) → predose processing → radiation crosslinking modified → irradiation reprocessing → lettering or the production process of lettering → product not; It is characterized in that; Irradiation dose is in the 6-15M scope, and preferred irradiation dose is in the 10-15M scope.
Radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable of the present invention, its production process and process optimization design enumeration are as follows:
Technological process:
Conductor is stranded → insulating exruded → (stranding → copper cash braid shielded → sheath extrude →) → predose processing → radiation crosslinking modified → irradiation reprocessing → lettering or lettering → product not
Process conditions:
Conductor is stranded: conductor is silver-plated copper conductor, tin-coated copper conductor, nickel-clad copper conductor, high strength copper alloy conductor etc.; Lead carries out stranded by lay ratio less than 20.
Insulating exruded: insulating material is cross-linked ethylene-tetrafluoro ethylene polymer; Individual layer or double-deck thin insulating structural design are carried out insulating exruded on the high temperature extruder of special use; Insulating exruded temperature is in 280-345 ℃ of scope, and optimal design is that equal difference increases progressively, and draws and gets speed 30-50m/min; Draw ratio is between the 8-12; Insulation nominal thickness individual layer should be controlled in 0.1～0.15mm scope; Bilayer should be controlled in 0.2～0.25mm scope.Stranding: carry out stranded at 630 disc type cablers; Lay ratio is 11-14.Braiding: adopt 16 ingots or 24 ingot braiding machines to weave, the braiding single line is circle or flat silver-coated copper wire or tinned wird or nickel plated copper wire.Sheath is extruded: sheath material is cross-linked ethylene-tetrafluoro ethylene polymer; Carrying out sheath on the high temperature extruder of special use extrudes; The sheath extrusion temperature is in 280-345 ℃ of scope, and optimal design is that equal difference increases progressively, and draws and gets speed 30-50m/min; Draw ratio is between the 8-12.
The irradiation operation:
Be insulating material to be carried out radiation modification, its molecular structure is changed, form distinctive tridimensional network by electron accelerator.Thereby improve temperature resistant grade, mechanical strength and the ageing-resistant performance etc. of product.The irradiation operation is divided predose processing, radiation crosslinking modified processing and three processes of irradiation reprocessing.
Predose is handled: electric wire is fully cooled off, remove surface moisture, keep the electric wire surface temperature control in 20 ± 3 ℃, and carry out the ground wire connection in advance, this process is extremely important, is the key that guarantees the irradiation quality;
Radiation crosslinking modified processing: the many or few mechanical performance and physical properties that directly influence electric wire of irradiation dose, size and long-term a large amount of scientific experimentation and statistical analyses according to wire size, we determine that finally irradiation dose needs just can reach best effect at 6-15M, the key of this process also has Trace speed except that irradiation dose, Trace speed should be controlled in the 30-50m/min scope according to the wire rod of different size;
The irradiation reprocessing: this process significant feature is that wire rod behind the irradiation is handled again, purpose is to remove the hydrogen fluoride (HF) that produces by 200 ± 2 ℃ of high temperature in the irradiation process, avoids the hydrogen fluoride of wire surface to place tensile strength and the color of elongation at break and wire rod and the smooth degree on surface that produces chemical change influence insulation in air.
But above-mentioned finished product is lettering or lettering not as required, the product of this method invention, and printed character has high temperature resistant, the anti-wiping performance that do not come off.
The present invention compared with prior art has following advantage and effect:
1, radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire manufacture method of the present invention, it is uncomplicated to have technical process, is easy to advantages such as control.
2,, make products obtained therefrom can satisfy the high mechanical properties of Aero-Space electric wire, high temperature resistant, anti-various Aero-Space with instructions for use under all kinds of adverse circumstances of the extreme complexity of oil by temperature resistant grade, mechanical strength and the ageing-resistant performance etc. of radiation crosslinking modified raising wire insulation; Its every technical performance index can reach the requirement of MILSTD MIL-W-22759E.
3, ultra-thin insulating barrier design, its insulation nominal thickness is 0.10～0.15mm, has little, the lightweight characteristics of volume, satisfies Aero-Space product miniaturization, light-weighted requirement.
4, double-deck thin insulating structural design, double-deck gross thickness is 0.20～0.25mm, has the characteristics of temperature resistant grade height, wear-resistant, good mechanical property, can satisfy the requirement of using under all kinds of extremely complex environments of Aero-Space.
5, lenticular wire braid shielded: have little, the lightweight characteristics of volume, can satisfy Aero-Space product high-performance, miniaturization, light-weighted requirement.
6, products obtained therefrom has the printing adaptability height, and printed character has high temperature resistant, the anti-wiping performance that do not come off.
Concrete execution mode:
The present invention is further described below in conjunction with embodiment, but the invention is not restricted to this.
Embodiment one
20AWG silver-plated copper conductor individual layer X-ETFE insulated electric conductor production example, the single layer structure design, the insulation nominal thickness is 0.11～0.15mm scope.
Technological process:
Conductor is stranded → insulating exruded → predose processing → radiation crosslinking modified → irradiation reprocessing → lettering → product
Conductor is stranded: select for use the silver-coated copper wire after the annealing to carry out stranded less than 20 by the lay ratio of standard-required;
Insulating exruded: as to select special import X-ETFE material for use, on the high temperature extruder of special use, carry out.The high temperature machine is respectively distinguished temperature in 280-345 ℃ of scope, and equal difference increases progressively; Drawing the speed of getting is 30m/min, and draw ratio is 8.
Predose is handled: suitably ventilate in the draft chamber and remove the electric wire surface moisture, and be transferred to cooling chamber wire temperature is controlled in 20 ± 3 ℃ of scopes;
Radiation crosslinking modified: irradiation dose 10-11M, going out linear velocity is 35m/min;
Irradiation reprocessing: remove the hydrogen fluoride (HF) that in the irradiation process, produces by 200 ± 2 ℃ of high temperature.
Lettering → product
Embodiment two
The double-deck X-ETFE insulated electric conductor of 22AWG nickel-clad copper conductor production example; The double-decker design, the insulation nominal thickness is 0.20～0.25mm scope.
Technological process:
Conductor is stranded → insulating exruded → predose processing → radiation crosslinking modified → irradiation reprocessing → lettering → product
Conductor is stranded: select for use the nickel plated copper wire after the annealing to carry out stranded less than 20 by the lay ratio of standard-required;
Insulating exruded:
Primary insulation is extruded: select special import X-ETFE material for use, carry out on the high temperature extruder of special use.The high temperature machine is respectively distinguished temperature in 280-345 ℃ of scope, and equal difference increases progressively; Drawing the speed of getting is 30m/min, and draw ratio is 9;
Outer layer insulation is extruded: select special import X-ETFE material for use, carry out on the high temperature extruder of special use.The high temperature machine is respectively distinguished temperature in 280-345 ℃ of scope, and equal difference increases progressively; Drawing the speed of getting is 35m/min, and draw ratio is 10;
Predose is handled: suitably ventilate in the draft chamber and remove the electric wire surface moisture, and be transferred to cooling chamber wire temperature is controlled in 20 ± 3 ℃ of scopes;
Radiation crosslinking modified: irradiation dose 8-9M, going out linear velocity is 50m/min; Irradiation reprocessing: remove the hydrogen fluoride (HF) that in the irradiation process, produces by 200 ± 2 ℃ of high temperature.
Lettering → product
Embodiment three
The 20AWG silver-plated copper conductor individual layer X-ETFE silver-plated flat type copper wire braiding X-ETFE jacketed cable production example that insulate; Insulating material is cross-linked ethylene-tetrafluoro ethylene polymer; The single layer structure design, the insulation nominal thickness is 0.10～0.15mm scope.：
Technological process:
Conductor is stranded → and insulating exruded → flat type copper wire braid shielded → sheath extrudes → predose processing → radiation crosslinking modified → irradiation reprocessing → lettering → product
Conductor is stranded: select for use the silver-coated copper wire after the annealing to carry out stranded less than 20 by the lay ratio of standard-required;
Insulating exruded: as to select special import X-ETFE material for use, on the high temperature extruder of special use, carry out.The high temperature machine is respectively distinguished temperature in 280-345 ℃ of scope, and equal difference increases progressively; Drawing the speed of getting is 30m/min; Draw ratio is 8.Braiding: 16 ingot braiding machines, 16 * 1 * (thick 0.04mm * wide 0.34mm) silver-plated flat type copper wire braiding structures.Sheath is extruded: sheath material is: cross-linked ethylene-tetrafluoro ethylene polymer; Carrying out sheath on the high temperature extruder of special use extrudes; The sheath extrusion temperature is in 280-345 ℃ of scope, and optimal design is that equal difference increases progressively, and draws and gets speed 30-50m/min; Draw ratio is between the 8-12.
Predose is handled: suitably ventilate in the draft chamber and remove the electric wire surface moisture, and be transferred to cooling chamber wire temperature is controlled in 20 ± 3 ℃ of scopes;
Radiation crosslinking modified: irradiation dose 10-15M, going out linear velocity is 35m/min;
Irradiation reprocessing: remove the hydrogen fluoride (HF) that in the irradiation process, produces by 200 ± 2 ℃ of high temperature.
Lettering → product
Embodiment four
The two core 22AWG tin-coated copper conductor individual layer X-ETFE zinc-plated circular copper wire braiding X-ETFE jacketed cable production example that insulate; Insulating material is cross-linked ethylene-tetrafluoro ethylene polymer; The single layer structure design, the insulation nominal thickness is 0.10～0.15mm scope.：
Technological process:
Conductor is stranded → and insulating exruded → stranding → braiding → sheath extrudes → predose processing → radiation crosslinking modified → irradiation reprocessing → lettering → product
Conductor is stranded: select for use the tinned wird after the annealing to carry out stranded less than 20 by the lay ratio of standard-required;
Insulating exruded: as to select special import X-ETFE material for use, on the high temperature extruder of special use, carry out.The high temperature machine is respectively distinguished temperature in 280-345 ℃ of scope, and equal difference increases progressively; Drawing the speed of getting is 30m/min; Draw ratio is 9; Stranding: lay ratio be 13 carry out stranded; Braiding: 16 ingot braiding machines, 16 * 3 * 0.1 zinc-plated circular copper wire braiding structure.Sheath is extruded: sheath material is: cross-linked ethylene-tetrafluoro ethylene polymer; Carrying out sheath on the high temperature extruder of special use extrudes; The sheath extrusion temperature is in 280-345 ℃ of scope, and optimal design is that equal difference increases progressively, and draws and gets speed 30-50m/min; Draw ratio is between the 8-12.
Predose is handled: suitably ventilate in the draft chamber and remove the electric wire surface moisture, and be transferred to cooling chamber wire temperature is controlled in 20 ± 3 ℃ of scopes;
Radiation crosslinking modified: irradiation dose 10-15M, going out linear velocity is 35m/min; Irradiation reprocessing: remove the hydrogen fluoride (HF) that in the irradiation process, produces by 200 ± 2 ℃ of high temperature.
Lettering → product
Product detects:
To the foregoing description product sampling and detecting, its every technical performance index result is as follows:
1. main performance meets or exceeds the requirement of MILSTD MIL-W-22759E.
2. the ultra-thin insulation system design of individual layer, nominal thickness is 0.10～0.15mm.
3. double-deck thin insulating structural design, nominal thickness are 0.20～0.25mm.
4. lenticular wire braid shielded design, lenticular wire thickness 0.03～0.05mm, lenticular wire width 0.30～0.88mm.
5. insulation resistance 〉=1500M Ω km.
6. tensile strength 〉=34.5Mpa insulate.
7. elongation at break 〉=75% insulate.
8. resistant of high or low temperature :-65 ℃～200 ℃.
9. (300 ℃, 7h): reel and do not ftracture, the immersion voltage test does not puncture in crosslinking degree test.
10. (230 ℃, 500h): reel and do not ftracture, the immersion voltage test does not puncture anti-aging test.
11. the high temperature flexing test (313 ℃, 2h): do not ftracture.
12. fire resistance: prolong combustion time≤3～30 second, burning length≤76mm.
Claims (6)
1, a kind of radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable, structure comprises conductor, insulating barrier, woven shield, restrictive coating, it is characterized in that: its radiation crosslinking modified ethylene-tetrafluoroethylene polymer insulation layer thickness is in 0.10～0.25mm scope, single layer designs insulation nominal thickness is in the 0.1-0.15mm scope, and double layer design insulation nominal overall thickness is 0.20～0.25mm scope; Woven shield adopts flat type copper wire braiding, lenticular wire thickness 0.03～0.05mm, lenticular wire width 0.30～0.88mm; Restrictive coating adopts the radiation crosslinking modified ethylene-tetrafluoroethylene polymer, and thickness is 0.15～0.24mm.
2, radiation crosslinking modified ethylene-tetrafluoroethylene polymer insulation electric wire according to claim 1; It is characterized in that: radiation crosslinking modified ethylene-tetrafluoroethylene polymer monolayers design insulation nominal thickness is 0.11～0.12mm scope.
3, a kind of radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable technology, comprise cable conductor stranded → insulating exruded → (stranding → copper cash braid shielded → sheath extrude →) → predose processing → radiation crosslinking modified → irradiation reprocessing → lettering or the production process of lettering → finished product not; It is characterized in that: radiation crosslinking modified irradiation dose is at 6-15M, and radiation crosslinking modified processing Trace speed is in the 30-50m/min scope, and the irradiation post-processing temperature is 200 ± 2 ℃.
4, according to the described radiation crosslinking modified ethylene-tetrafluoroethylene polymer insulation of claim 3 electric wire technology; It is characterized in that: radiation crosslinking modified irradiation dose is at 10-15M.
5, according to the described radiation crosslinking modified ethylene-tetrafluoroethylene polymer insulation of claim 3 electric wire technology; It is characterized in that: radiation crosslinking modified irradiation dose is at 10-11M.
6, according to the described radiation crosslinking modified ethylene-tetrafluoroethylene polymer insulation of claim 3 electric wire technology; It is characterized in that: radiation crosslinking modified irradiation dose is at 8-9M.
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| CNB2006100360178A CN100411061C (en) | 2006-06-20 | 2006-06-20 | Radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable |
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| CNB2006100360178A CN100411061C (en) | 2006-06-20 | 2006-06-20 | Radiation crosslinking modified ethylene-tetrafluoroethylene insulated wire cable |
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| CN100411061C CN100411061C (en) | 2008-08-13 |
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| CN102280209A (en) * | 2011-07-25 | 2011-12-14 | 南京大学 | Method for laminated irradiation crosslinking cable of electron beam of high-energy accelerator |
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