CN1126417A - Method for prodn. of electrothermal belt with temp. self-controlling function - Google Patents
Method for prodn. of electrothermal belt with temp. self-controlling function Download PDFInfo
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- CN1126417A CN1126417A CN 95101542 CN95101542A CN1126417A CN 1126417 A CN1126417 A CN 1126417A CN 95101542 CN95101542 CN 95101542 CN 95101542 A CN95101542 A CN 95101542A CN 1126417 A CN1126417 A CN 1126417A
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- temperature control
- heating tape
- control heating
- self temperature
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Abstract
The electrothermal belt with self-control of temp is made up of high-density or low-density polyethylene, copolymer of ethylene and ethylene acetate or ethylene propylene rubber, corbon black, antioxidant, and zinc oxide or calcium carbonate through pugging, cutting, extruding, coating insulating layer, heat treatment, wrapping protective cover, and irradiation, and features stable positive temp coefficient, high working temp up to 80 deg.C, thermal output power greater than 40 W/m and maximal temp damping rate less than 6%.
Description
The present invention relates to the manufacture method of self temperature control heating tape.
Self temperature control heating tape is a kind of novel electric heater, and its external form resembles the flat TV feeder of used as television.The main body of self temperature control heating tape is the temperature switch plastic material with positive temperature coefficient of resistivity characteristic behind the crosslinking with radiation, adds the composite material that carbon black makes as low-pressure polyethylene.On the devices such as self temperature control heating tape is flexible to be wrapped in needs to heat, insulation, anti-condensation, antifreeze pipeline, valve, the pump housing, basin, have automatic heating, regulate power and limit characteristics such as temperature automatically automatically, easy to use, remarkable energy saving effect is arranged.Self temperature control heating tape begins development and production by U.S. RAYCHEM company in the sixties, and some units of China also successively develop temperature self controlled electrically-heated carries product, and has Chinese patent CN87102924 " siding temperaturing heating belt production method and products thereof automatically " open.Promptly " make electrode with two equally spaced long metal cores, lay heat-sensitive electric switch material (being ptc material) layer thereon continuously, outside electric heating element, clad one deck high polymer sheath, " again through the crosslinked heating tape finished product that becomes of integral radiation as heater.This patent documentation name is said the production method of automatic siding temperaturing heating belt, but only discloses the manufacturing process of heating tape, and the composition of raw materials of unexposed its key technology ptc material and other key technology.Therefore be a technology that is difficult to carry out.
The purpose of this invention is to provide and a kind ofly have automatic heating, regulate power, the automatic manufacture method of the ribbon heater of limit temperature automatically.
For the technological process of the manufacture method of finishing the self temperature control heating tape that goal of the invention proposes is: A, make core material, promptly with the mixing semi-conductor electricity thermal plastic high polymer of plastics processing mill material, and be cut into pellet, B, extrude the core band, promptly pellet is extruded with plastic extruding machine, cladding at two on the parallel tinned wird electrode, form flat banded electric heating element, C, the banded electric heating element that fan is flat is by plastic extruding machine cladding one deck inner insulating layer, d, cladding being gone up the banded electric heating element of inner insulating layer heat-treats, e, the banded electric heating element of cladding being gone up inner insulating layer clads a hdpe layer oversheath again, f, crosslinking with radiation upward gets the self temperature control heating tape finished product after placing radiation field irradiation in the ribbon heater of oversheath with cladding; The composition of raw materials of making the self temperature control heating tape core body is (by weight)
55-70 parts of low density polyethylene (LDPE) or high density polyethylene (HDPE)s
15-25 parts in ethene-acetate ethylene copolymer or ethylene-propylene rubber
8-15 parts of carbon blacks
0.5-1 part in antioxidant
3-5 parts in zinc oxide or calcium carbonate
The material of the inner insulating layer of self temperature control heating tape can be selected PAUR or EU for use.
When selecting low density polyethylene (LDPE) for use in the raw material of the core body of self temperature control heating tape, the heat treatment temperature of ribbon heater element is 130-140 ℃; When selecting high density polyethylene (HDPE) for use, heat treatment temperature is 145-153 ℃, and the processing time is 20-24 hours.
The total radiation dose of self temperature control heating tape is 100-150KGY.
The self temperature control heating tape of producing with the present invention has stable positive temperature coefficient feature, and working temperature reaches 80 ℃ of grades, thermal output 〉=40 watt/meter, (10 ℃ of ambient temperatures), maximum operating temperature attenuation rate＜6%.
Embodiment one, with 55 parts of low density polyethylene (LDPE)s, 25 parts of ethene-acetate ethylene copolymers, 15 parts of carbon blacks, 3 parts in zinc oxide, 1 part in antioxidant be through the mixing one-tenth homogeneous semiconductor of double roller plastic-making device thermal plastic high polymer core material, and be cut into pellet with stock-cutter.By multiple screw extruder with the core body pellet extrude cladding two on the parallel tinned wird electrode, form flat banded electric heating element.Banded electric heating element by multiple screw extruder cladding one deck PAUR insulating barrier, is placed in the electric drying oven with forced convection, then 130-140 ℃ of following heat treatments 20-24 hours.Again the ribbon heater element after the heat treatment is cladded a hdpe layer by multiple screw extruder and form oversheath, place radiation field to be radiated to accumulated dose 100-150KGY at last.Promptly get the self temperature control heating tape finished product.
Embodiment two, with 70 parts of high density polyethylene (HDPE)s, 20 parts in ethylene-propylene rubber, 8 parts of carbon blacks, 5 parts in calcium carbonate, 0.7 part in antioxidant, mixing, blank, by plastic extruding machine cladding two on parallel tinned wird electrode, clad one deck EU insulating barrier again.145-152 ℃ of following heat treatments 20-24 hours, clad the last layer high density polyethylene (HDPE) again and form oversheath then, become the self temperature control heating tape finished product with accumulated dose 100-150KGY irradiation again.
Embodiment three, with 60 parts of high density polyethylene (HDPE)s, 15 parts of ethene-acetate ethylene copolymers, 12 parts of carbon blacks, 4 parts in zinc oxide, 0.5 part in antioxidant, mixing, blank, by plastic extruding machine cladding two on parallel tinned wird electrode, clad one deck PAUR insulating barrier again.145-152 ℃ of following heat treatments 20-24 hours, clad a hdpe layer again and form oversheath then,, get the finished product self temperature control heating tape again with accumulated dose 100-150KGY irradiation with fire protecting performance.
Claims (4)
1, a kind of manufacture method of self temperature control heating tape, technological process is: A, make core material, promptly with the mixing semi-conductor electricity thermal plastic high polymer of plastics processing mill material, and be cut into pellet, B, extrude the core band, promptly pellet is extruded with plastic extruding machine, cladding at two on the parallel tinned wird electrode, form flat banded electric heating element, C, banded electric heating element is cladded a hdpe layer oversheath by plastic extruding machine again, d, crosslinking with radiation upward gets the self temperature control heating tape finished product after placing the radiation field radiation in the ribbon heater of oversheath with cladding, it is characterized in that the composition of raw materials of said making self temperature control heating tape core body is (by weight)
55-70 parts of low density polyethylene (LDPE) or high density polyethylene (HDPE)s
15-25 parts in ethene-acetate ethylene copolymer or ethylene-propylene rubber
8-15 parts of carbon blacks
0.5-1 part in antioxidant
3-5 parts in zinc oxide or calcium carbonate
2, the manufacture method of self temperature control heating tape according to claim 1 is characterized in that after extruding the core band flat banded electric heating element being cladded one deck inner insulating layer by plastic extruding machine in the said technological process.
3, the manufacture method of self temperature control heating tape according to claim 1 and 2, it is characterized in that after extruding the core band or behind the cladding inner insulating layer, also heat-treating in the said technological process, when selecting low density polyethylene (LDPE) for use in the raw material of the core body of self temperature control heating tape, the heat treatment temperature of ribbon heater element is 130-140 ℃; When selecting high density polyethylene (HDPE) for use, the heat treatment temperature of ribbon heater element is 145-153 ℃, and heat treatment time is 20-24 hours.
4, the manufacture method of self temperature control heating tape according to claim 1 is characterized in that the irradiation accumulated dose in the said technological process is 100-150KGY.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101542 CN1126417A (en) | 1995-03-03 | 1995-03-03 | Method for prodn. of electrothermal belt with temp. self-controlling function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95101542 CN1126417A (en) | 1995-03-03 | 1995-03-03 | Method for prodn. of electrothermal belt with temp. self-controlling function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1126417A true CN1126417A (en) | 1996-07-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95101542 Pending CN1126417A (en) | 1995-03-03 | 1995-03-03 | Method for prodn. of electrothermal belt with temp. self-controlling function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1126417A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100566476C (en) * | 2004-11-22 | 2009-12-02 | 张维新 | A kind of thermo electric material and pipeline energy-saving electrothermic insulation sheet |
| CN102103907A (en) * | 2010-12-29 | 2011-06-22 | 王崇 | Device and method for manufacturing twin-core three-layer self-regulating heating cable |
| CN101376724B (en) * | 2007-08-28 | 2011-07-20 | 玮锋科技股份有限公司 | High polymer bearing belt of passive component and manufacturing method thereof |
| CN102573154A (en) * | 2012-02-02 | 2012-07-11 | 西安盖沃热能科技有限公司 | Self temperature limiting heat tracing strip of PTC (positive temperature coefficient) high polymer conductive composite material and preparation method thereof |
-
1995
- 1995-03-03 CN CN 95101542 patent/CN1126417A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100566476C (en) * | 2004-11-22 | 2009-12-02 | 张维新 | A kind of thermo electric material and pipeline energy-saving electrothermic insulation sheet |
| CN101376724B (en) * | 2007-08-28 | 2011-07-20 | 玮锋科技股份有限公司 | High polymer bearing belt of passive component and manufacturing method thereof |
| CN102103907A (en) * | 2010-12-29 | 2011-06-22 | 王崇 | Device and method for manufacturing twin-core three-layer self-regulating heating cable |
| CN102103907B (en) * | 2010-12-29 | 2012-09-26 | 王崇 | Device and method for manufacturing twin-core three-layer self-regulating heating cable |
| CN102573154A (en) * | 2012-02-02 | 2012-07-11 | 西安盖沃热能科技有限公司 | Self temperature limiting heat tracing strip of PTC (positive temperature coefficient) high polymer conductive composite material and preparation method thereof |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |