CN108024400A - A kind of parallel connection invariable power heating tape and its manufacture method - Google Patents
A kind of parallel connection invariable power heating tape and its manufacture method Download PDFInfo
- Publication number
- CN108024400A CN108024400A CN201711256809.0A CN201711256809A CN108024400A CN 108024400 A CN108024400 A CN 108024400A CN 201711256809 A CN201711256809 A CN 201711256809A CN 108024400 A CN108024400 A CN 108024400A
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- China
- Prior art keywords
- insulation layer
- heating tape
- extruded
- bus insulation
- invariable power
- Prior art date
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/40—Heating elements having the shape of rods or tubes
- H05B3/54—Heating elements having the shape of rods or tubes flexible
- H05B3/56—Heating cables
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/017—Manufacturing methods or apparatus for heaters
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- Resistance Heating (AREA)
Abstract
The invention discloses a kind of invariable power heating tape in parallel and its manufacture method, it is related to heating tape field, comprises the following steps：1) plain conductor electrode is prepared；2) bus insulation layer is prepared；3) bus insulation layer extrudes；4) cross-linking radiation；5) heater is extruded winds with heater element；6) prepare insulation inner sheath and strengthen outer cover；7) insulation inner sheath extrudes；8) secondary cross-linking radiation；9) braided metal woven shield；10) strengthen oversheath to extrude, structure innovation of the present invention, increase bus insulation layer in metal conducting electrodes outer layer, improve interface contact resistance, extend life of product；Process innovation：Differences in expansion is reduced using coextrusion process method；Using the manufacture method of isostension regular structure twisted wire, ensure the needs that the ultra-thin long length of bus insulation layer is extruded；The step of increasing by one of cross-linking radiation, lift the durability of product；Invariable power heating tape fever in parallel is uniform and stable, suitable for most of the circumstances, Waterproofing/oilproofing.
Description
Technical field
The present invention relates to heating tape field, and in particular to a kind of parallel connection invariable power heating tape and its manufacture method.
Background technology
Self-limiting heating cable (hereinafter referred to as heating tape) is also known as Self-controlled electric with worm line or temp control electric heating cable.It is a kind of
Electric thermal power limits warm heat tracing device with the banding of system temperature self-regulated.The heating element of heating tape, is in two parallel metal busbares
Between uniformly extrude one layer have positive temperature coefficient conductive plastics.Conductive plastics is connected across on two parallel bus and is formed simultaneously
Join the resistance heater in circuit, output power can be automatically adjusted with the temperature change of heated system, adjust liberated heat, with
Achieve the purpose that automatic temp limit, to ensure optimum operation warm area normal operation of the work system all-the-time stable in setting.
The parallel line structure of heating tape it is cut short at any time at the scene or spreading uses within the specific limits, makes to apply
Work is very convenient.And allow juxtaposition and without the worry for overheating and burning.Under normal circumstances, temperature controller can be unworthy of.Only exist
The exigent occasion of temperature control precision just matches somebody with somebody temperature controller.
Perpetual motion power accompanying-heat cable in parallel is a kind of electric tracing product that heater is done by cored wire, and this heating cable adds
Thermal element is in parallel, its heating element is wrapped on conductor busbar, and the length of heating element is female by heating element and conductor
The distance of line determines that parallel construction determines that it can cut randomly length and scene and can seal tail end with dedicated accessory
Simple mounting means, this parallel connection accompanying-heat cable existing manufacture means are more coarse, the material used also by it is a variety of not
Definite factor, the quality for causing heating tape are difficult control.
The content of the invention
It is an object of the invention to provide a kind of invariable power heating tape in parallel and its manufacture method, to solve in the prior art
Caused the above-mentioned defects.
A kind of parallel connection invariable power heating tape, it is characterised in that including metal conducting electrodes, the metal conducting electrodes outsourcing
It is wrapped with bus insulation layer and is in close contact with metal conducting electrodes and form shunt circuit, fever is equipped with successively outside bus insulation layer
Body, heater element, insulation inner sheath, metal knitted shielded layer and strengthen oversheath, the heater element for nichrome wire and
It is wrapped on heater.
Preferably, the plain conductor electrode is that single, twin-core or three cores are in parallel.
A kind of manufacture method of parallel connection invariable power heating tape, comprises the following steps：
1) plain conductor electrode is prepared：Using buncher process isostension twisted wire as plain conductor electrode, if twin-core
Or three cores, then the centreline space of plain conductor electricity level is away from for 5-6mm；
2) bus insulation layer is prepared：The bus insulation layer is made of fluorinated ethylene propylene copolymer；
3) bus insulation layer extrudes：According to the needs of single, twin-core or three cores, the metallic conduction electricity that step 1) is obtained
Pole is placed on etc. on quantity draw drum, passes through the active actinobacillus frame of co-extrusion production line so that and plain conductor electrode twisted wire is released at the same time,
By tension controller with constant-tension after heating unit preheats, into co-extruding machine head, wrap up bus insulation layer, and cause
It is consistent with the tension force of metal conducting electrodes, is extruded together with metal conducting electrodes, is wrapped up after water cooling and air cooling
Bus insulation layer and metal conducting electrodes be in close contact and form shunt circuit, be wound on take-up stand after dragger quickly pulls out
Take-up reel on；
4) cross-linking radiation：By the plain conductor electrode for being extruded with bus insulation layer in step 3) uniformly across high energy electricity
The irradiation scanning window of sub- accelerator carries out overall irradiation to complete cross-linking process；
5) heater is extruded winds with heater element：The plain conductor electrode that step 4) is extruded with to bus insulation layer passes through
The active actinobacillus frame of co-extrusion production line so that the plain conductor electrode for being extruded with bus insulation layer is released at the same time, through overtension control
Device processed after heating unit preheats, into co-extruding machine head, wraps up heating material, and so that and metallic conduction with constant-tension
The tension force of electrode is consistent, and is extruded together with metal conducting electrodes, the bus insulation wrapped up after water cooling and air cooling
Layer is in close contact the part as PTC core ribbon with metal conducting electrodes and heater, then is wound heater element with spiral filament forming machine
On heater surface, it is wound on after dragger quickly pulls out on the take-up reel of take-up stand；
6) prepare insulation inner sheath and strengthen outer cover：The insulation inner sheath and reinforcement oversheath use soluble poly
It is prepared by tetrafluoroethene material；
7) insulation inner sheath extrudes：The PTC core ribbon that step 5) obtains is placed on a draw drum, is produced by co-extrusion
The active actinobacillus frame of line, PTC core ribbon is released, and by tension controller after heating unit preheats, is added in step 6)
Insulation inner sheath material enters co-extruding machine head, parcel insulation inner sheath, and causes the plain conductor with being extruded with bus insulation layer
The tension force of electrode is consistent, and is extruded together with the plain conductor electrode for being extruded with bus insulation layer, is first passed through spark tester
Performance detection is carried out, then after water cooling and air cooling, take-up stand is wound on after endress belt dragger quickly pulls out
Take-up reel on；
8) secondary cross-linking radiation：The PTC core ribbon for being extruded with insulation inner sheath that step 7) is obtained is uniformly across high energy
The irradiation scanning window of electron accelerator carries out overall irradiation to complete cross-linking process, and the band that can be used is obtained after radiation treatment
There is the heating tape of insulating layer；
9) braided metal woven shield：Aluminum-magnesium alloy wire is selected, aluminum-magnesium alloy wire is put into putting for doubling winder pay off rack
On drum, and by 8 aluminum-magnesium alloy wires and into 1 silk be wound on spindle by doubling winder, the spindle of aluminum-magnesium alloy wire will be wound with
It is put into energy high-speed knitter, the PTC core ribbon with insulation inner sheath for synchronously obtaining step 8) is placed on a draw drum
On, by the pay off rack of wire rewinding and paying off machine, the heating tape with insulating layer is released, is compiled aluminum-magnesium alloy wire by high-speed knitter
System forms metal knitted shielded layer on heating tape；
10) strengthen oversheath to extrude：Step 9) is obtained into the PTC core ribbon with metal knitted shielded layer with the side of step 7)
Formula extrudes one layer of reinforcement oversheath again, forms final invariable power heating tape in parallel.
Preferably, heating unit is preheated to 210 DEG C in the step 3)
Preferably, irradiation dose is controlled between 12-18Mrad in the step 4).
Preferably, heating unit is preheated to 180 DEG C in the step 5).
Preferably, heating unit is preheated to 200 DEG C in the step 7).
Preferably, irradiation dose is controlled between 12-18Mrad in the step 8).
Preferably, heating unit is preheated to 200 DEG C in the step 10).
The advantage of the invention is that：
1st, structure innovation：Increase bus insulation layer in resultant metal conductive electrode outer layer, improve interface contact resistance, prolong
Life of product is grown；
2nd, process innovation：Using coextrusion process method, ensure metal conducting electrodes and bus insulation layer in the molten state
Shaping sticks together at the same time, and contact is good, reduces differences in expansion；Using the manufacture method of isostension regular structure twisted wire, make
The stranded conductor accuracy of manufacture improves, and ensures the needs of the ultra-thin long length extrusion of bus insulation layer；
3rd, properties of product are innovated：The step of increasing by one of cross-linking radiation, more improve the stability of temperature, lift product
Durability；
5th, by extrude bus insulation layer, insulation inner sheath and strengthen oversheath, add the security performance of product, it is this
Heating tape is stable, while production cost is also low, and adds metal knitted shielded layer, improves the comprehensive of heating tape
Energy；
6th, invariable power heating tape fever in parallel is uniform and stable, most constructions is flexibly applicable in, suitable for most rings
Border, Waterproofing/oilproofing.
Brief description of the drawings
Fig. 1 is the structure diagram of present invention invariable power heating tape in parallel.
Wherein, 1 plain conductor electrode, 2- bus insulation layers, 3- heaters, 4- heater elements, 5- insulation inner sheaths, 6- gold
Belong to woven shield, 7- strengthens oversheath.
Embodiment
To make the technical means, the creative features, the aims and the efficiencies achieved by the present invention easy to understand, with reference to
Embodiment, the present invention is further explained.
A kind of parallel connection invariable power heating tape, including metal conducting electrodes 1, the metal conducting electrodes 1 are wrapped with busbar
Insulating layer 2 is simultaneously in close contact composition shunt circuit with metal conducting electrodes 1, and heater 3, hair are equipped with successively outside bus insulation layer 2
Thermal element 4, insulation inner sheath 5, metal knitted shielded layer 6 and strengthen oversheath 7, the heater element 4 for nichrome wire and
It is wrapped on heater 3.
In the present embodiment, the plain conductor electrode 1 is that single, twin-core or three cores are in parallel.
A kind of manufacture method of parallel connection invariable power heating tape, comprises the following steps：
1) plain conductor electrode 1 is prepared：Using buncher process isostension twisted wire as plain conductor electrode, 1, if double
Core or three cores, then the centreline space of plain conductor electricity level 1 is away from for 5-6mm；
2) bus insulation layer 2 is prepared：The bus insulation layer 2 is made of fluorinated ethylene propylene copolymer；
3) bus insulation layer 2 extrudes：According to the needs of single, twin-core or three cores, the metallic conduction that step 1) is obtained
Electrode 1 is placed on etc. on quantity draw drum, passes through the active actinobacillus frame of co-extrusion production line so that 2 twisted wire of plain conductor electrode is at the same time
Release, by tension controller with constant-tension after heating unit preheats, into co-extruding machine head, parcel bus insulation layer 2,
And make it that the tension force with metal conducting electrodes 2 is consistent, and is extruded together with metal conducting electrodes 1, by water cooling and air cooling
But the bus insulation layer 2 wrapped up afterwards is in close contact with metal conducting electrodes 1 and forms shunt circuit, after dragger quickly pulls out
It is wound on the take-up reel of take-up stand；
4) cross-linking radiation：By the plain conductor electrode 1 for being extruded with bus insulation layer 2 in step 3) uniformly across high energy
The irradiation scanning window of electron accelerator carries out overall irradiation to complete cross-linking process；
5) heater 3 is extruded winds with heater element part 4：Step 4) is extruded with to the plain conductor electricity of bus insulation layer 2
The active actinobacillus frame that pole 1 passes through co-extrusion production line so that be extruded with the plain conductor electrode 1 of bus insulation layer 2 while release, pass through
Overtension controller after heating unit preheats, into co-extruding machine head, wraps up 3 material of heater, and cause with constant-tension
It is consistent with the tension force of metal conducting electrodes 2, is extruded together with metal conducting electrodes 1, is wrapped after water cooling and air cooling
The bus insulation layer 2 wrapped up in is in close contact the part as PTC core ribbon with metal conducting electrodes 1 and heater 3, then uses spiral filament forming machine
Heater element 4 is wrapped on 3 surface of heater, is wound on after dragger quickly pulls out on the take-up reel of take-up stand；
6) prepare insulation inner sheath 5 and strengthen outer cover 7：The insulation inner sheath 3 and reinforcement oversheath 5 are using solvable
Property polytetrafluoroethylene material prepare；
7) insulation inner sheath 5 extrudes：The PTC core ribbon that step 5) obtains is placed on a draw drum, is given birth to by co-extrusion
The active actinobacillus frame of producing line, PTC core ribbon is released, and by tension controller after heating unit preheats, is added in step 6)
3 material of insulation inner sheath enter co-extruding machine head, parcel insulation inner sheath 3, and cause the metal with being extruded with bus insulation layer 2
The tension force of lead electrode 1 is consistent, and is extruded together with the plain conductor electrode 1 for being extruded with bus insulation layer 2, is first passed through spark
Testing machine carries out performance detection, then after water cooling and air cooling, is wound on after endress belt dragger quickly pulls out
On the take-up reel of take-up stand；
8) secondary cross-linking radiation：The PTC core ribbon for being extruded with insulation inner sheath 5 that step 7) is obtained is uniformly across high energy
The irradiation scanning window of electron accelerator carries out overall irradiation to complete cross-linking process, and the band that can be used is obtained after radiation treatment
There is the heating tape of insulating layer；
9) braided metal woven shield 6：Aluminum-magnesium alloy wire is selected, aluminum-magnesium alloy wire is put into putting for doubling winder pay off rack
On drum, and by 8 aluminum-magnesium alloy wires and into 1 silk be wound on spindle by doubling winder, the spindle of aluminum-magnesium alloy wire will be wound with
It is put into energy high-speed knitter, the PTC core ribbon with insulation inner sheath 5 for synchronously obtaining step 8) is placed on a draw drum
On, by the pay off rack of wire rewinding and paying off machine, the heating tape with insulating layer is released, is compiled aluminum-magnesium alloy wire by high-speed knitter
System forms metal knitted shielded layer 6 on heating tape；
10) strengthen oversheath 7 to extrude：Step 9) is obtained into the PTC core ribbon with metal knitted shielded layer 6 with step 7)
Mode extrudes one layer of reinforcement oversheath 7 again, forms final invariable power heating tape in parallel.
In the present embodiment, heating unit is preheated to 210 DEG C in the step 3)
In the present embodiment, irradiation dose is controlled between 12-18Mrad in the step 4).
In the present embodiment, heating unit is preheated to 180 DEG C in the step 5).
In the present embodiment, heating unit is preheated to 200 DEG C in the step 7).
In the present embodiment, irradiation dose is controlled between 12-18Mrad in the step 8).
In the present embodiment, heating unit is preheated to 200 DEG C in the step 10).
Based on above-mentioned, the advantage of the invention is that：
1st, structure innovation：In 1 outer layer of the metal conducting electrodes increase bus insulation layer 2 of product, interracial contact electricity is improved
Resistance, extends life of product；
2nd, process innovation：Using coextrusion process method, ensure metal conducting electrodes 1 and bus insulation layer 2 in molten condition
Lower shaping at the same time sticks together, and contact is good, reduces differences in expansion；Using the manufacture method of isostension regular structure twisted wire,
The stranded conductor accuracy of manufacture is improved, ensures the needs of the ultra-thin long length extrusion of bus insulation layer；
3rd, properties of product are innovated：The step of increasing by one of cross-linking radiation, more improve the stability of temperature, lift product
Durability；
5th, by extruding bus insulation layer 2, insulation inner sheath 3 and strengthen oversheath 5, the security performance of product is added,
This heating tape is stable, while production cost is also low, and adds metal knitted shielded layer, improves the synthesis of heating tape
Performance；
6th, invariable power heating tape fever in parallel is uniform and stable, most constructions is flexibly applicable in, suitable for most rings
Border, Waterproofing/oilproofing.
As known by the technical knowledge, the present invention can pass through the embodiment party of other essence without departing from its spirit or essential feature
Case is realized.Therefore, embodiment disclosed above, all things considered, is all merely illustrative, not the only.Institute
Have within the scope of the present invention or be included in the invention in the change being equal in the scope of the present invention.
Claims (9)
- A kind of 1. parallel connection invariable power heating tape, it is characterised in that including metal conducting electrodes (1), the metal conducting electrodes (1) It is wrapped with bus insulation layer (2) and is in close contact with metal conducting electrodes (1) and form shunt circuit, bus insulation layer (2) is outside Heater (3), heater element (4), insulation inner sheath (5), metal knitted shielded layer (6) are equipped with successively and strengthen oversheath (7), The heater element (4) is nichrome wire and is wrapped on heater (3).
- A kind of 2. invariable power heating tape in parallel according to claim 1, it is characterised in that：The plain conductor electrode (1) It is in parallel for single, twin-core or three cores.
- 3. a kind of manufacture method of invariable power heating tape in parallel according to any one in claim 1 or 2, its feature exist In comprising the following steps：1) plain conductor electrode (1) is prepared：Using buncher process isostension twisted wire as plain conductor electrode (1), if double Core or three cores, then the centreline space of plain conductor electricity level (1) is away from for 5-6mm；2) bus insulation layer (2) is prepared：The bus insulation layer (2) is made of fluorinated ethylene propylene copolymer；3) bus insulation layer (2) extrudes：According to the needs of single, twin-core or three cores, the metallic conduction electricity that step 1) is obtained Pole (1) is placed on etc. on quantity draw drum, passes through the active actinobacillus frame of co-extrusion production line so that plain conductor electrode (2) twisted wire is same When release, by tension controller with constant-tension after heating unit preheats, into co-extruding machine head, wrap up bus insulation layer (2), and make it that the tension force with metal conducting electrodes (2) is consistent, and is extruded together with metal conducting electrodes (1), by water cooling But it is in close contact with the bus insulation layer (2) wrapped up after air cooling with metal conducting electrodes (1) and forms shunt circuit, by traction Machine is wound on the take-up reel of take-up stand after quickly pulling out；4) cross-linking radiation：By the plain conductor electrode (1) for being extruded with bus insulation layer (2) in step 3) uniformly across high energy The irradiation scanning window of electron accelerator carries out overall irradiation to complete cross-linking process；5) heater (3) is extruded winds with heater element (4)：Step 4) is extruded with to the plain conductor electricity of bus insulation layer (2) The active actinobacillus frame that pole (1) passes through co-extrusion production line so that be extruded with the plain conductor electrode (1) of bus insulation layer (2) at the same time Release, by tension controller with constant-tension after heating unit preheats, into co-extruding machine head, wrap up heater (3) material Material, and make it that the tension force with metal conducting electrodes (2) is consistent, and is extruded together with metal conducting electrodes (1), by water cooling Being in close contact with the bus insulation layer (2) wrapped up after air cooling with metal conducting electrodes (1) and heater (3) becomes PTC core ribbon A part, then heater element (4) is wrapped on heater (3) surface with spiral filament forming machine, after dragger quickly pulls out around On the take-up reel of take-up stand；6) prepare insulation inner sheath (5) and strengthen outer cover (7)：The insulation inner sheath (3) and reinforcement oversheath (5) use It is prepared by soluble polytetrafluoroethylene material；7) inner sheath (5) that insulate extrudes：The PTC core ribbon that step 5) obtains is placed on a draw drum, is produced by co-extrusion The active actinobacillus frame of line, PTC core ribbon is released, and by tension controller after heating unit preheats, is added in step 6) Insulation inner sheath (3) material enters co-extruding machine head, parcel insulation inner sheath (3), and causes and be extruded with bus insulation layer (2) The tension force of plain conductor electrode (1) is consistent, and is extruded together with the plain conductor electrode (1) for being extruded with bus insulation layer (2), First pass through spark tester and carry out performance detection, then after water cooling and air cooling, it is quick by endress belt dragger It is wound on after pull-out on the take-up reel of take-up stand；8) secondary cross-linking radiation：By the PTC core ribbon for being extruded with insulation inner sheath (5) that step 7) obtains uniformly across high energy electricity The irradiation scanning window of sub- accelerator carries out overall irradiation to complete cross-linking process, and obtain using after radiation treatment carries The heating tape of insulating layer；9) braided metal woven shield (6)：Aluminum-magnesium alloy wire is selected, aluminum-magnesium alloy wire is put into the unwrapping wire of doubling winder pay off rack On disk, and by 8 aluminum-magnesium alloy wires and into 1 silk be wound on spindle by doubling winder, the spindle for being wound with aluminum-magnesium alloy wire is put Enter in energy high-speed knitter, the PTC core ribbon with insulation inner sheath (5) for synchronously obtaining step 8) is placed on a draw drum On, by the pay off rack of wire rewinding and paying off machine, the heating tape with insulating layer is released, is compiled aluminum-magnesium alloy wire by high-speed knitter System forms metal knitted shielded layer (6) on heating tape；10) strengthen oversheath (7) to extrude：Step 9) is obtained into the PTC core ribbon with metal knitted shielded layer (6) with step 7) Mode extrudes one layer and strengthens oversheath (7) again, forms final invariable power heating tape in parallel.
- A kind of 4. manufacture method of invariable power heating tape in parallel according to claim 3, it is characterised in that：The step 3) Middle heating unit is preheated to 210 DEG C.
- A kind of 5. manufacture method of invariable power heating tape in parallel according to claim 3, it is characterised in that：The step 4) Middle irradiation dose control is between 12-18Mrad.
- A kind of 6. manufacture method of invariable power heating tape in parallel according to claim 3, it is characterised in that：The step 5) Middle heating unit is preheated to 180 DEG C.
- A kind of 7. invariable power heating tape volume manufacture method in parallel according to claim 3, it is characterised in that：The step 7) Middle heating unit is preheated to 200 DEG C.
- A kind of 8. manufacture method of invariable power heating tape in parallel according to claim 3, it is characterised in that：The step 8) Middle irradiation dose control is between 12-18Mrad.
- A kind of 9. manufacture method of invariable power heating tape in parallel according to claim 3, it is characterised in that：The step 10) heating unit is preheated to 200 DEG C in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711256809.0A CN108024400A (en) | 2017-12-04 | 2017-12-04 | A kind of parallel connection invariable power heating tape and its manufacture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711256809.0A CN108024400A (en) | 2017-12-04 | 2017-12-04 | A kind of parallel connection invariable power heating tape and its manufacture method |
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| Publication Number | Publication Date |
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| CN108024400A true CN108024400A (en) | 2018-05-11 |
Family
ID=62078076
Family Applications (1)
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| CN201711256809.0A Pending CN108024400A (en) | 2017-12-04 | 2017-12-04 | A kind of parallel connection invariable power heating tape and its manufacture method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109068424A (en) * | 2018-08-06 | 2018-12-21 | 芜湖市旭辉电工新材料有限责任公司 | A kind of alloy wire heating cable processing method |
| CN109065282A (en) * | 2018-08-10 | 2018-12-21 | 芜湖市旭辉电工新材料有限责任公司 | A kind of heat conductive insulating accompanying-heat cable processing method |
| CN109275208A (en) * | 2018-09-28 | 2019-01-25 | 佛山市懿燊科技服务有限公司 | A kind of efficient self limiting temperature heating cable |
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| CN1863417A (en) * | 2006-06-15 | 2006-11-15 | 王崇 | Positive temp coefficient high polymer semiconductor temp control heatingcable and mfg. method thereof |
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| CN109275208A (en) * | 2018-09-28 | 2019-01-25 | 佛山市懿燊科技服务有限公司 | A kind of efficient self limiting temperature heating cable |
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Application publication date: 20180511 |
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