CN1050492C - Preparation method of polyethylene material with positive temperature coefficient of resistivity - Google Patents
Preparation method of polyethylene material with positive temperature coefficient of resistivity Download PDFInfo
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- CN1050492C CN1050492C CN95104914A CN95104914A CN1050492C CN 1050492 C CN1050492 C CN 1050492C CN 95104914 A CN95104914 A CN 95104914A CN 95104914 A CN95104914 A CN 95104914A CN 1050492 C CN1050492 C CN 1050492C
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- resistivity
- temperature
- polyethylene
- antioxidant
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- 239000000463 material Substances 0.000 title claims abstract description 30
- -1 polyethylene Polymers 0.000 title claims abstract description 20
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 16
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 229920001903 high density polyethylene Polymers 0.000 claims abstract description 15
- 239000004700 high-density polyethylene Substances 0.000 claims abstract description 15
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 11
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 11
- 239000006229 carbon black Substances 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 238000005453 pelletization Methods 0.000 claims description 7
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 claims description 6
- 235000019260 propionic acid Nutrition 0.000 claims description 3
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 abstract description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 abstract 1
- 238000005469 granulation Methods 0.000 abstract 1
- 230000003179 granulation Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 1
- 238000010074 rubber mixing Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 3
- 239000008187 granular material Substances 0.000 description 3
- 239000008188 pellet Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 229920002313 fluoropolymer Polymers 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 241000276498 Pollachius virens Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000009671 shengli Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention belongs to a preparation method of polyethylene material with positive temperature coefficient of resistivity.
The invention selects high-density polyethylene, MI: 0.5-2.0; d: 0.940-0.968, 60-80 parts by weight, 40-20 parts by weight of conductive carbon black or acetylene carbon black and antioxidant, 2, 6-di-tert-butyl-p-methylphenol or antioxidant pentaerythritol tetrakis [3- (3 ', 5 ' -di-tert-butyl-4 ' -hydroxyphenyl) propionate ], 0.5-2 parts by weight, or a two-roll rubber mixing mill is used for mixing at the temperature of 130-160 ℃, then the mixture is flaked, crushed and extruded and granulated in a single-screw extruder at the temperature of 160-185 ℃. Or mixing in a high-speed stirrer, performing mixing and melting, dispersing and plasticizing at the temperature of 160-185 ℃ by a double-screw extruder, and performing extrusion granulation to obtain the polyethylene material with the positive temperature coefficient of resistivity, wherein the self-limiting temperature of the polyethylene material is 110 +/-10 ℃.
Description
The invention belongs to the preparation method of polyethylene resistivity positive temp degree coefficient material.
Polyethylene resistivity positive temp degree coefficient material is a kind of of polyethylene/carbon ink composite material.Frydmann at first prepares composite material with polyethylene and carbon black.Paid attention to because blend positive temperature coefficient of resistivity characteristic is not obvious.The work of Kohler in 1966 points out that the composite material of high density polyethylene (HDPE) and carbon black has significant positive temperature coefficient of resistivity characteristic.It is the positive temperature coefficient of resistivity material of base material and as four serial BTV2 of core with polyethylene and fluoroplastics that the information that data such as U.S. Raychem company automatic control electric tracing line design manual provide has shown the said firm's Development and Production, QTV2, the self temperature control heating tape of STV2 and KTV2.Wherein, BTV2 series is base material with the polyethylene, 65 ℃ of long-term work temperature, and instantaneous temperature reaches 85 ℃.Other serial QTV2, STV2 and KTV2 are to be base material with fluoroplastics.The flat 7-37676 of Japan Patent TOHKEMY discloses a kind of " heater with positive temperature coefficient ".This technology is developed for avoiding heater abnormal heating problem at there being the higher thermal source of another temperature in the specific environment.China is domestic, and only to have developed with polyethylene resistivity positive temp degree coefficient material be the self temperature control heating tape of core.The oil recovery factory uses on the spot through the Shengli Oil Field triumph, limits temperature to be no more than 90 ℃ certainly.Far can not satisfy the needs of industry companion heat well.
The objective of the invention is to select high density polyethylene (HDPE) and conductive black or acetylene carbon black to make raw material, add the antioxidant preparation from the polyethylene resistivity positive temp degree coefficient material of limitting temperature at 110 ℃.
The present invention selects high density polyethylene (HDPE) for use, MI:0.5-2.0; D:0.940-0.968, the 60-80 weight portion, conductive black or acetylene carbon black 40-20 weight portion and antioxidant 2,6-di-tert-butyl methyl phenol or antioxidant four [3-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] quaternary amyl alcohol ester, the 0.5-2 weight portion cooperates.Or through twin-screw extruder in 130-160 ℃ down mixing, beat sheet then, pulverize, in single screw extrusion machine in 160-185 ℃ of following extruding pelletization.Or in homogenizer, mix, under 160-185 ℃, carry out consolute through double screw extruder, disperse and plasticizing, extruding pelletization, the polyethylene resistivity positive temp degree coefficient material material that obtains, it is 110 ± 10 ℃ from limitting temperature.
The main application of material of the present invention is the core of 105 ℃ of self temperature control heating tapes of warm grade industry heating cable in the conduct, is cross-linked to form stable macromolecule memory network material through 60 cobalt gamma-rays crosslinkings with radiation or the irradiation of electron accelerator electron beam again after the moulding.
Industry companion thermal technology has passed through steam companion thermal technology, and permanent power electric tracing technology and three kinds of technology of temp autocontrolled electric tracing technology three phases ratio of funds in economic analysis are about 3: 2.5: 1.Many materials all have the positive temperature coefficient of resistivity material behavior.Ceramic resistor rate PTC material commonly used has the high characteristics of the hot temperature of companion, and even the purpose that can be used to heat.But coming conveniently not as high molecule electric resistance rate PTC material material aspect the machine-shaping.It is restricted hardly on length to originate from the control-temperature electric heating band next life with high molecule electric resistance rate PTC material material.Its quality is soft, twines easily, and using has many advantages.As intellectuality, companion's thermal technology of height electricity saving and energy saving is in industry, and is civilian, and even national defence based on the temp autocontrolled electric tracing technology of high molecule electric resistance rate PTC material, and the military project aspect all has broad application prospects.
Embodiment provided by the invention is as follows:
Embodiment 1. gets high density polyethylene (HDPE), MI:0.6; D:0.960,60 weight portions, conductive black 40 weight portions, antioxidant 2,6-di-tert-butyl methyl phenol 2 weight portions.According to plastics, antioxidant, the charging sequence of carbon black had been heated on 130-160 ℃ the twin-screw extruder mixing 20 minutes, and beating sheet, to become thickness be the thin slice of 1-2mm, pulverizes on plastic crusher.Next on single screw extrusion machine in 160-185 ℃ of following extruding pelletization.Granule size is φ 3 * 3mm.Above pellet is through the sample preparation of vulcanizing press compressing tablet, and it is 117 ℃ from limitting temperature that measuring resistance-temperature characteristics gets material.
Embodiment 2. gets high density polyethylene (HDPE), MI:1.8; D:0.946,80 weight portions, acetylene carbon black 20 weight portions, antioxidant 2,0.5 part of 6-di-tert-butyl methyl phenol.Mixed 10 minutes through homogenizer, feed in raw material then in double screw extruder, in 165-185 ℃ of following extruding pelletization.Granule size φ 3 * 3mm.Pellet is through the sample preparation of vulcanizing press compressing tablet, and it is 106 ℃ from limitting temperature that measuring resistance-temperature characteristics gets material.
Embodiment 3.Get high density polyethylene (HDPE), MI:1.2; D:0.954; 70 weight portions; Conductive black 30 weight portions, antioxidant four [3-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] quaternary amyl alcohol ester 0.5 weight portion.Mixed 10 minutes through homogenizer, feed in raw material then in double screw extruder, in 170-185 ℃ of following extruding pelletization.Granule size φ 3 * 3mm.Pellet is through the sample preparation of vulcanizing press compressing tablet, and it is 113 ℃ from limitting temperature that measuring resistance-temperature characteristics gets material.
Claims (1)
1. the preparation method of a polyethylene resistivity positive temp degree coefficient material is characterized in that selecting for use high density polyethylene (HDPE), MI:0.5-2.9; D:0.940-0.968, weight 60-80 part, conductive black or acetylene carbon black 40-20 weight portion and antioxidant 2,6-di-tert-butyl methyl phenol or antioxidant four [3-(3 ', 5 '-di-t-butyl-4 '-hydroxy phenyl) propionic acid] cooperation of quaternary amyl alcohol ester 0.5-2 weight portion.Or through twin-screw extruder in 130-160 ℃ down mixing, beat sheet then, pulverize, in single screw extrusion machine in 160-185 ℃ of following extruding pelletization.Or in homogenizer, mix, under 160-185 ℃, carry out consolute through double screw extruder, disperse and plasticizing, extruding pelletization, the polyethylene resistivity positive temp degree coefficient material that obtains, it is 110 ± 10 ℃ from limitting temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95104914A CN1050492C (en) | 1995-05-10 | 1995-05-10 | Preparation method of polyethylene material with positive temperature coefficient of resistivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95104914A CN1050492C (en) | 1995-05-10 | 1995-05-10 | Preparation method of polyethylene material with positive temperature coefficient of resistivity |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1135704A CN1135704A (en) | 1996-11-13 |
| CN1050492C true CN1050492C (en) | 2000-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95104914A Expired - Fee Related CN1050492C (en) | 1995-05-10 | 1995-05-10 | Preparation method of polyethylene material with positive temperature coefficient of resistivity |
Country Status (1)
| Country | Link |
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| CN (1) | CN1050492C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465185B (en) * | 2007-12-18 | 2012-03-07 | 比亚迪股份有限公司 | Positive temperature coefficient material and thermistor containing the material and preparation method therefore |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058599C (en) * | 1996-12-26 | 2000-11-15 | 中国科学院长春应用化学研究所 | Manufacture of self thermal controlling electric heater |
| CN1058737C (en) * | 1997-11-13 | 2000-11-22 | 中国石油化工集团公司 | Resin composition for self-temp.-controlled heating cable |
| GB0427650D0 (en) * | 2004-12-17 | 2005-01-19 | Heat Trace Ltd | Electrical device |
| CN1826024B (en) * | 2006-03-23 | 2010-06-23 | 沈阳瑞华特种电缆有限公司 | Temp control electric heating cable and producing method |
| CN111356252A (en) * | 2020-04-03 | 2020-06-30 | 苏州星烁纳米科技有限公司 | Electrothermal film, conductive silver paste and preparation method of electrothermal film |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0737679A (en) * | 1993-07-22 | 1995-02-07 | Matsushita Electric Ind Co Ltd | Heater element with positive temperature coefficient of resistance |
-
1995
- 1995-05-10 CN CN95104914A patent/CN1050492C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0737679A (en) * | 1993-07-22 | 1995-02-07 | Matsushita Electric Ind Co Ltd | Heater element with positive temperature coefficient of resistance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101465185B (en) * | 2007-12-18 | 2012-03-07 | 比亚迪股份有限公司 | Positive temperature coefficient material and thermistor containing the material and preparation method therefore |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1135704A (en) | 1996-11-13 |
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