CN102170717B - Automatic temperature control and heat-tracing cable with semi-conducting polymer copper-cladding electrodes and method for making the same - Google Patents
Automatic temperature control and heat-tracing cable with semi-conducting polymer copper-cladding electrodes and method for making the same Download PDFInfo
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Abstract
The present invention discloses an automatic temperature control and heat-tracing cable with semi-conducting polymer copper-cladding electrodes and a method for making the same. The cable comprises two conductive electrodes (1), a PTC material layer (3), an insulating layer (4), a metal shielding layer (5) and a sheath layer (6). The two conductive electrodes (1) are parallel and arranged inside the PTC material layer (3), and the insulating layer (4), the metal shielding layer (5) and the sheath layer (6) are arranged outside the PTC material layer (3) successively. The cable is characterized in that an intermediate resistance layer (2) is arranged on every conductive electrode (1) and the intermediate resistance layer (2) is inside the PTC material layer (3). The automatic temperature control and heat-tracing cable with semi-conducting polymer copper-cladding electrodes is new in structure and simple in production, and has small starting current and stable temperature control performance. The cable can be widely applied in projects of heat tracing, heat preservation, etc. in many departments, such as petroleum, chemical industry, light industry and agricultural and sideline products processing.
Description
Technical field
The present invention relates to a kind of heating cable, belong to the electrothermal device technical field, specifically a kind of automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode and manufacture method thereof.
Background technology
Automatic temperature-controlled heat tracing cable is the intelligent insulation companion hot product that U.S. RAYCHEM company succeeds in developing the eighties, and its application is more and more extensive.The major component of common automatic temperature-controlled heat tracing cable is PTC core band, by two parallel conductive electrodes, external application one deck matrix is a kind of semiconducting polymer's material with positive temperature coefficient (being called for short PTC) characteristic, and core band skin is followed successively by flame retardant insulation, screen and restrictive coating.When the accompanying-heat cable plugged, electric current just vertically arrives another electrode by an electrode through the ptc material that is connected across between two electrodes, forms the loop, and electric energy conversion is heat energy, and the PTC exothermic material is heated up.The safety and stability of PTC core band has determined the quality of automatic temperature-controlled heat tracing cable, and safety and stability mainly is to be determined by the two contact resistance of ptc material performance and material and electrode.When the performance of ptc material reaches the certain mass requirement, and other technique be can not improve the time, and the performance of PTC core band is mainly determined by contact resistance.Because general ptc material is different from the thermal coefficient of expansion of the two material of electrode, and electrode surface and heater are physics and electrically contact, the adhesive force of the two is little, and after energising, instant starting currents is larger, because temperature gradient is arranged, electrode and heater can not act synergistically and easily break away from the formation gap, cause increase and the fluctuation thereof of contact resistance, and can cause the interface spark, destroy the composition of ptc material, and contact resistance is increased; In next time energising heating, cooling procedure, further increase contact resistance, so circulation causes the cable resistance value constantly to increase, and PTC effect and electricity-Re translation function fails gradually, product quality and stability decreases, and the expansion of spending with low baking temperature has the possibility of catching fire.Therefore starting current is low, contact resistance is stable is the important prerequisite of automatic temperature-controlled heat tracing cable safety and stability.
The main method and the technique that improve in the market the automatic temperature-controlled heat tracing cable quality are to improve the performance of ptc material, are to reduce starting current by changing prescription such as Chinese patent application " a kind of macromolecular self-regulating heating tape " application number CN200910210502.6; " resin composition for self-temp .-controlled heating cable " of China Petrochemical Corporation's application, the patent No. is CN97119459.9, is the cementability that improves material and electrode by adding cementitious material.Also have by conductive electrode is carried out structure of modification to improve the quality of products, such as the clear 63-32886 of patent application JP of Sumitomo Electrics Industry Ltd and the clear 58-106787 of patent application JP of Hitachi Cable Ltd., be that the resistance stability that one deck low electrical resistant material improves system is set between electrode and ptc material; The flat 6-13165 of the open patent of Panasonic Electric Equipment Industrial Co.,Ltd (or JP6013165A) thus adopt the conductive elastomer electrode to improve the cementability raising resistance stability of ptc material and electrode; The Chinese patent of Panasonic Electric Equipment Industrial Co.,Ltd's application " PTC thermistor electrode and manufacture method and PTC thermistor ", patent No. CN99123909.1, on electrode, to form the sinter layer that one deck has conductivity by the sintering electroconductive powder, the surface has concaveconvex shape, and then the bonding force of raising ptc material and electrode, reduce contact resistance value, and can improve the stability of contact resistance; " containing the conducting polymer electric device " patent JP2788968 of U.S. RAYCHEM company processes the stability that makes electrode surface have concaveconvex shape and then improve contact resistance by electrode deposition.
Although said method respectively has advantage, can not significantly reduce simultaneously starting current and improve the stability of contact resistance, perhaps there are complex process, problem that cost is high, its application is restricted.
Summary of the invention
The object of the present invention is to provide the automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode of the new structure that a kind of starting current is little, contact resistance is stable.
Another object of the present invention is to provide that a kind of technique is simple, the manufacture method of the automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode making easily, can reduce production costs.
The technical solution adopted in the present invention is: this automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode, comprise two conductive electrodes, ptc layer, insulating barrier, metal screen layer and restrictive coatings, two conductive electrodes are parallel to each other, be located in the ptc layer, outside at ptc layer is provided with insulating barrier, metal screen layer and restrictive coating successively, it is characterized in that: be provided with intermediate resistor layer at every conductive electrode, intermediate resistor layer is arranged in ptc layer.
The present invention also implements by following measure: described conductive electrode is the copper cash conductive electrode of the zinc-plated or nickel plating of strands, generally forms by the 3-37 core is stranded.
Described ptc layer is heater, is made by common PTC, fire-retardant PTC or fluorine-containing ptc material.
Described intermediate resistor layer is made by the crosslinkable semi-conductive high polymer material of making through modification take thermoplastics, thermoplastic elastomer (TPE) or fluoroplastics as matrix, and the specific insulation of described semi-conductive high polymer material is 10
2～10
6Ω cm should be far above ptc material, the resistive layer resistance of formation should greater than or be equivalent to the resistance of ptc layer, the PTC intensity of semi-conductive high polymer material is less than 1.0,200 ℃ oxidation induction period (OIT) of semi-conductive high polymer material is greater than 100min.
Described insulating barrier and restrictive coating are made by PE, Teflon FEP or PVDF material.
Described metal screen layer is aluminum-magnesium alloy wire, tinned copper wire, tin-coated copper plated aluminium B alloy wire or other metal wire knitted web frame, and coverage density is greater than 80%.
The manufacture method of above-mentioned automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode, it is characterized in that: it may further comprise the steps: (1), extruded by an extruder at two conductive electrode skins and to coat one deck semi-conductive high polymer material as intermediate resistor layer, extruded outside intermediate resistor layer by another extruder simultaneously and lay ptc layer, form PTC core band; (2), with the PTC core band made behind heat treatment and cross-linking radiation, extrude the coated insulation layer at PTC core band skin, and then through high-speed knitter braiding layer of metal screen, extrude at last and coat the upper jacket layer, finally make automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode.
Because semi-conductive high polymer material and ptc material are coextrusion under molten condition, bonding force is very large, contact resistance is stable, intermediate resistor layer resistance at room temperature greater than or be equivalent to the resistance of ptc layer, and intermediate resistor layer resistance and ptc layer resistance form cascaded structure, therefore all-in resistance is more much higher than the resistance of common PTC core band, and the cable starting current reduces; Raising along with temperature, the intermediate resistor layer resistance variations is less, and ptc layer resistance increases, thereby the both end voltage of ptc layer constantly increases, the intermediate resistor layer both end voltage constantly reduces, temperature continues to improve, near operating temperature, the specific insulation of ptc layer is more than several times of intermediate resistor layer, its resistance is much larger than intermediate resistor layer resistance, and the both end voltage of ptc layer reaches maximum, near supply voltage, system voltage, all-in resistance, heating temp reach balance, and the self-regulating performance of cable is substantially unaffected.
Beneficial effect of the present invention is: novel structure, produce simply, the starting current of cable is little, and temperature control performance is stable, can be widely used on the engineerings such as tracing thermal-insulating of the departments such as oil, chemical industry, light industry, agricultural byproducts processing.
Description of drawings
Fig. 1 is structure section generalized section of the present invention;
Among the figure: 1, conductive electrode; 2, intermediate resistor layer; 3, ptc layer; 4, insulating barrier; 5, metal screen layer; 6, restrictive coating.
Embodiment
Make the present invention with reference to accompanying drawing 1.A kind of automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode, comprise two conductive electrodes 1, ptc layer 3, insulating barrier 4, metal screen layer 5 and restrictive coating 6, two conductive electrodes 1 are parallel to each other, be located in the ptc layer 3, be provided with successively insulating barrier 4, metal screen layer 5 and restrictive coating 6 in the outside of ptc layer 3, it is characterized in that: be provided with intermediate resistor layer 2 at every conductive electrode 1, intermediate resistor layer 2 is arranged in ptc layer 3.
Described conductive electrode 1 is the tinned wird conductive electrode of strands, generally forms by the 3-37 core is stranded.
Described ptc layer 3 is heater, is made by common ptc material.
Described intermediate resistor layer 2 is made by the crosslinkable semi-conductive high polymer material of making through modification take thermoplastics as matrix, and the specific insulation of described semi-conductive high polymer material is 4 * 10
3Ω cm, the PTC intensity of semi-conductive high polymer material is 0.85,200 ℃ oxidation induction period (OIT) of semi-conductive high polymer material is 140min.
Described insulating barrier 4 and restrictive coating 6 are made by the PE material.
Described metal screen layer 5 is the aluminum-magnesium alloy wire woven mesh structure, and coverage density is 81%.
The manufacture method of above-mentioned automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode, it is characterized in that: it may further comprise the steps: (1), extruded by an extruder at two conductive electrode 1 skins and to coat one deck semi-conductive high polymer material as intermediate resistor layer 2, extruded outside intermediate resistor layer 2 by another extruder simultaneously and lay ptc layer 3, form PTC core band; (2), with the PTC core band made behind heat treatment and cross-linking radiation, extrude coated insulation layer 4 at PTC core band skin, and then through high-speed knitter braiding layer of metal screen 5, extrude at last and coat upper jacket layer 6, finally make automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode.
Embodiment 2
A kind of automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode, comprise two conductive electrodes 1, ptc layer 3, insulating barrier 4, metal screen layer 5 and restrictive coating 6, two conductive electrodes 1 are parallel to each other, be located in the ptc layer 3, be provided with successively insulating barrier 4, metal screen layer 5 and restrictive coating 6 in the outside of ptc layer 3, it is characterized in that: be provided with intermediate resistor layer 2 at every conductive electrode 1, intermediate resistor layer 2 is arranged in ptc layer 3.
Described conductive electrode 1 is the copper cash conductive electrode of the nickel plating of strands.
Described ptc layer 3 is heater, is made by fire-retardant ptc material.
Described intermediate resistor layer 2 is made by the crosslinkable semi-conductive high polymer material of making through modification take thermoplastic elastomer (TPE) as matrix, and the specific insulation of described semi-conductive high polymer material is 5 * 10
2Ω cm, the PTC intensity of semi-conductive high polymer material is 0.8,200 ℃ oxidation induction period (OIT) of semi-conductive high polymer material is 180min.
Described insulating barrier 4 and restrictive coating 6 are made by Teflon FEP material.
Described metal screen layer 5 is the tinned copper wire woven mesh structure, and coverage density is greater than 81%.
The manufacture method of above-mentioned automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode is identical with embodiment 1.
A kind of automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode, comprise two conductive electrodes 1, ptc layer 3, insulating barrier 4, metal screen layer 5 and restrictive coating 6, two conductive electrodes 1 are parallel to each other, be located in the ptc layer 3, be provided with successively insulating barrier 4, metal screen layer 5 and restrictive coating 6 in the outside of ptc layer 3, it is characterized in that: be provided with intermediate resistor layer 2 at every conductive electrode 1, intermediate resistor layer 2 is arranged in ptc layer 3.
Described conductive electrode 1 is the zinc-plated copper cash conductive electrode of strands.
Described ptc layer 3 is heater, is made by fluorine-containing ptc material.
Described intermediate resistor layer 2 is made by the crosslinkable semi-conductive high polymer material of making through modification take fluoroplastics as matrix, and the specific insulation of described semi-conductive high polymer material is 1 * 10
5Ω cm, the PTC intensity of semi-conductive high polymer material is 0.9,200 ℃ oxidation induction period (OIT) of semi-conductive high polymer material is 160min.
Described insulating barrier 4 and restrictive coating 6 are made by the PVDF material.
Described metal screen layer 5 is tin-coated copper plated aluminium B alloy wire woven mesh structure, and coverage density is greater than 81%.
The manufacture method of above-mentioned automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode is identical with embodiment 1.
Claims (2)
1. automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode, comprise two conductive electrodes (1), ptc layer (3), insulating barrier (4), metal screen layer (5) and restrictive coating (6), two conductive electrodes (1) are parallel to each other, be located in the ptc layer (3), be provided with successively insulating barrier (4) in the outside of ptc layer (3), metal screen layer (5) and restrictive coating (6), it is characterized in that: be provided with intermediate resistor layer (2) at every conductive electrode (1), intermediate resistor layer (2) is arranged in ptc layer (3);
Described conductive electrode (1) is the copper cash conductive electrode of the zinc-plated or nickel plating of strands;
Described ptc layer (3) is made by common PTC, fire-retardant PTC or fluorine-containing ptc material;
Described intermediate resistor layer (2) is made by the crosslinkable semi-conductive high polymer material of making through modification take thermoplastics, thermoplastic elastomer (TPE) or fluoroplastics as matrix, and the specific insulation of described semi-conductive high polymer material is 10
2～10
6Ω cm should be far above ptc material, the resistive layer resistance of formation should greater than or be equivalent to the resistance of ptc layer, the PTC intensity of semi-conductive high polymer material is less than 1.0,200 ℃ oxidation induction period (OIT) of semi-conductive high polymer material is greater than 100min;
Described insulating barrier (4) and restrictive coating (6) are made by PE, Teflon FEP or PVDF material;
Described metal screen layer (5) is aluminum-magnesium alloy wire, tinned copper wire, tin-coated copper plated aluminium B alloy wire or other metal wire knitted web frame, and coverage density is greater than 80%.
2. method of making automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode claimed in claim 1, it is characterized in that: it may further comprise the steps: (1), extruded by an extruder at two conductive electrode skins and to coat one deck semi-conductive high polymer material as intermediate resistor layer, extruded outside intermediate resistor layer by another extruder simultaneously and lay ptc layer, form PTC core band; (2), with the PTC core band made behind heat treatment and cross-linking radiation, extrude the coated insulation layer at PTC core band skin, and then through high-speed knitter braiding layer of metal screen, extrude at last and coat the upper jacket layer, finally make automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110056323 CN102170717B (en) | 2011-03-10 | 2011-03-10 | Automatic temperature control and heat-tracing cable with semi-conducting polymer copper-cladding electrodes and method for making the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110056323 CN102170717B (en) | 2011-03-10 | 2011-03-10 | Automatic temperature control and heat-tracing cable with semi-conducting polymer copper-cladding electrodes and method for making the same |
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| CN102170717A CN102170717A (en) | 2011-08-31 |
| CN102170717B true CN102170717B (en) | 2013-03-20 |
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| CN104582036A (en) * | 2013-10-17 | 2015-04-29 | 安徽安邦控制系统有限公司 | Control type self-temperature-controlling heat tracing cable |
| CN103871638A (en) * | 2014-02-28 | 2014-06-18 | 无为县金华电缆材料有限公司 | Self temperature control heat tracing electric wire |
| CN103903732A (en) * | 2014-03-03 | 2014-07-02 | 安徽慧艺线缆集团有限公司 | Heating cable with automatic temperature control function |
| CN104735829A (en) * | 2015-03-28 | 2015-06-24 | 安徽华瑞电气有限公司 | Anti-corrosion anti-tensile electric heating band |
| WO2017190146A1 (en) * | 2016-04-29 | 2017-11-02 | Pentair Thermal Management Llc | Voltage-leveling monolithic self-regulating heater cable |
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| CN107393635A (en) * | 2017-08-23 | 2017-11-24 | 贵州固达电缆有限公司 | A kind of compound telephone wire |
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| WO1999030334A1 (en) * | 1997-12-08 | 1999-06-17 | Acome Societe Cooperative De Travailleurs | Self-adjusting cables and method for making same |
| CN2525761Y (en) * | 2002-01-10 | 2002-12-11 | 侯毅 | Self control temperature heating cable with intelligent positice temperature coefficient |
| CN100569028C (en) * | 2006-06-15 | 2009-12-09 | 王崇 | Positive temp coefficient high polymer semiconductor temp control heatingcable and manufacture method thereof |
| CN101977452B (en) * | 2010-10-20 | 2012-07-25 | 王崇 | Self-temperature limiting heat tracing belt and manufacturing method thereof |
| CN201937865U (en) * | 2011-03-10 | 2011-08-17 | 山东科虹线缆有限公司 | Automatic temperature controlled heat tracing cable for semi-conductive high polymer copper electrode |
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Owner name: SHANDONG KEHONG WIRE + CABLE TECHNOLOGY CO., LTD. Free format text: FORMER NAME: SHANDONG KEHONG WIRE + CABLE CO., LTD. |
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Address after: 271110 government residence of Laicheng district and Zhuang Township, Shandong City, Laiwu Province Patentee after: SHANDONG KEHONG WIRE & CABLE TECHNOLOGY Co.,Ltd. Address before: 271110 government residence of Laicheng district and Zhuang Township, Shandong City, Laiwu Province Patentee before: SHANDONG KEHONG WIRE & CABLE Co.,Ltd. |
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Address after: 271110 Residence of Hezhuang Town and Laicheng District, Laiwu City, Shandong Province Patentee after: SHANDONG KEHONG WIRE & CABLE TECHNOLOGY CO.,LTD. Address before: 271110 government residence of Laicheng district and Zhuang Township, Shandong City, Laiwu Province Patentee before: SHANDONG KEHONG WIRE & CABLE TECHNOLOGY Co.,Ltd. Address after: 271110 Residence of Laiwu District and Zhuangzhen Town, Jinan City, Shandong Province Patentee after: Shandong Zhengtai Cable Co.,Ltd. Address before: 271110 Residence of Hezhuang Town and Laicheng District, Laiwu City, Shandong Province Patentee before: SHANDONG KEHONG WIRE & CABLE TECHNOLOGY CO.,LTD. |
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Denomination of invention: A semi conductive polymer coated copper electrode self controlled temperature tracing cable and its manufacturing method Effective date of registration: 20230601 Granted publication date: 20130320 Pledgee: Laiwu Branch of China Construction Bank Corp. Pledgor: Shandong Zhengtai Cable Co.,Ltd. Registration number: Y2023980042643 |