CN1253504C - Preparation method of teflon electrothermal material - Google Patents
Preparation method of teflon electrothermal material Download PDFInfo
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- CN1253504C CN1253504C CNB031148336A CN03114833A CN1253504C CN 1253504 C CN1253504 C CN 1253504C CN B031148336 A CNB031148336 A CN B031148336A CN 03114833 A CN03114833 A CN 03114833A CN 1253504 C CN1253504 C CN 1253504C
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- electric thermal
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- teflon
- tetrafluoroethylene
- carbon black
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Compositions Of Macromolecular Compounds (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a preparation method of a composite electric thermal material, particularly to a preparation method of a teflon electric thermal material, which solves the defects of complex technology, large appliance investment and environmental pollution of the existing dispersion method of the teflon electric thermal material. The preparation method of a teflon electric thermal material has the technical scheme that in the preparation method of a teflon electric thermal material, conductive carbon black and graphite conducting materials are added in teflon. The preparation method of a teflon electric thermal material is characterized in that the suspended teflon resin is used as a base material, the powder granular conductive carbon black and the graphite conducting materials are added in the base material, the base material, the conductive carbon black and the graphite conducting materials are mixed by carrying out the method of drying by using a mixer, mixture is directly added in a mould and is put in a presser, the mixture is formed by pre-pressing, a blank is formed, the blank is put in a sintering furnace and is sintered, and the blank can be processed into the teflon electric thermal materials with various geometric shapes by using a lathe after the process of cooling. The composite electric thermal material can be used for making electric thermal products, such as an ultra-thin energy-saving electric thermal blanket, an electric thermal garment, an electric thermal cushion, a glass defogging mirror, an electric thermal cup, an electric thermal container, etc.
Description
Technical field: the preparation method who the present invention relates to a kind of composite electric hating material, being particularly related to a kind of is base material by the suspension injecting tetrafluoroethylene resin, adds the preparation method that the tetrafluoroethylene thermo electric material of heat can take place after energising that electro-conductive materials such as conductive carbon black and graphite make.
Background technology: polytetrafluoroethylene (PTFE) synthesizes and is divided into suspension polymerization and dispersion polymerization, and the purposes and the moulding process of goods are depended in the selection of concrete polymerization process.The PTFE resin of suspension polymerization generally is used for pressing, and dry mixed is adopted in the mixing of stuffing product.Diffuse-aggregate PTFE dispersion liquid is used for spraying, curtain coating, dipping and wet-mixed stuffing product.The tetrafluoroethylene thermo electric material of Sheng Chaning adopts diffuse-aggregate dispersion liquid to be made in the market.Its preparation method is the PTFE dispersion liquid, conductive carbon black, electro-conductive materials such as graphite are put into the isothermal reaction still and are carried out wet-mixed, the synthetic PTFE resin of filling, in this technological process, must control synthesis temperature and stirring velocity well, otherwise can influence the quality and the performance of product, to fill the PTFE resin then and carry out drying, dry back adds the synthetic pasty state of oil miscible solvent, deposited at a certain temperature tens of hours, after treating that solvent oil fully permeates, carry out premolding and make " crude green body ", " crude green body " put into the pushing machine be formed into round strip, in the constant temperature rolling press, make band shape then, equal solvent oil sinters the PTFE ribbon heater into after volatilizing to the greatest extent in air.This preparation method's complex process, temperature control requirement is higher in the technical process, and production unit has high input, and turnout is little, and solvent oil evaporate in the air can cause environmental pollution, is easy to generate the instability of quality of item, and shape of product is single.
Summary of the invention: the technical issues that need to address of the present invention are: guaranteeing that the PTFE thermo electric material has softness, folding is folded, corrosion-resistant, heating is fast, under even, the energy-conservation condition of generating heat, providing the simple and free of contamination PTFE thermo electric material of a kind of technology preparation technology.Can obtain the PTFE thermo electric material of different shape.Technical scheme of the present invention is: the preparation method of tetrafluoroethylene thermo electric material, in tetrafluoroethylene, add conductive carbon black, graphite material, it is characterized in that: with the suspension injecting tetrafluoroethylene resin is base material, add form of powdery particles conductive carbon black, graphite material therein, carry out dry mixed through mixer, directly compound is added mould, put into the press pre-molding and make blank, then blank is put into the sintering oven sintering, can be utilized machined into to become the tetrafluoroethylene thermo electric material of various geometrical shapies after the cooling.The weight proportion of three kinds of raw materials is: suspension injecting tetrafluoroethylene resin 70-90 part, and carbon black 1-10 part, graphite 5-20 part, preformed pressure is controlled at 20-60MPa/cm
2, sintering temperature is controlled at 340 ℃-390 ℃.The invention has the beneficial effects as follows: preparation technology is simple, the production unit less investment, and output is big, and is pollution-free.The quality of product and stable performance.The tetrafluoroethylene thermo electric material that obtains had both kept the physics and the chemical property of tetrafluoroethylene excellence, can be used as good heating element again, and heating efficiency is higher than general traditional thermo electric material, can be processed into band shape, sheet, bar-shaped, blocky thermo electric material according to user's needs, and can utilize it to make electric heating products such as ultrathin energy saving electric blanket, electric heating clothes, electric heating seating washer, glass dispersing fog mirror, electric cup, electric heating vessel.The tetrafluoroethylene thermo electric material performance comparison of the tetrafluoroethylene thermo electric material of dispersion method preparation and suspension method preparation is seen: table one
| Name of product | Dispersion PTFE (%) | Suspended PTFE (%) | Carbon black (%) | Graphite (%) | Volume specific resistance (Ω .cm) | Tensile strength (MPa) |
| The dispersion PTFE thermo electric material | 72 | 9 | 19 | 0.9 | 15.0 | |
| Suspended PTFE thermo electric material 1# | 84 | 6 | 10 | 0.995 | 16.2 | |
| Suspended PTFE thermo electric material 2# | 85 | 5 | 10 | 1.5 | 17.5 | |
| Suspended PTFE thermo electric material 3# | 80 | 5 | 15 | 0.71 | 12.6 |
Can illustrate by above data, when volume specific resistance is suitable, the tensile strength of the tetrafluoroethylene thermo electric material of suspension method preparation reaches and surpasses the tetrafluoroethylene thermo electric material of dispersion method preparation, at volume specific resistance hour, the tetrafluoroethylene thermo electric material of suspension method preparation reaches the requirement of engineering plastics using strength.
Embodiment: embodiment 1: in 85 kilograms of suspension injecting tetrafluoroethylene resins, add 10 kilograms in 5 kilograms of form of powdery particles carbon blacks and graphite, add abundant mixing evenly in the mixing tank, compound is added compression molding in the cylindrical die, moulding pressure is 35MPa/cm
2, put into the sintering oven sintering after the depanning, sintering temperature is 370 ℃, comes out of the stove after the cooling, becomes band through machined into.The volume specific resistance that records is 1.5 Ω .cm.The above-mentioned PTFE ribbon heater that makes is cut into desired length by the size of bed, carries out series-parallel connection by rated output, connecting with the mains to obtain softness, the folded electric blanket of comfortable, energy-conservation, slim folding.Also can make products such as electric heating clothes, electric heating seating washer, glass dispersing fog mirror of this method.
Embodiment 2: in 75 kilograms of suspension injecting tetrafluoroethylene resins, add 16 kilograms in 9 kilograms of form of powdery particles carbon blacks and graphite, fully evenly mixed in the adding mixing tank, compression molding in the compound adding cylindrical die, moulding pressure is 45MPa/cm
2, put into the sintering oven sintering after the depanning, sintering temperature is 350 ℃, comes out of the stove after the cooling, through the machined into slabbing.With the PTFE sheet that makes size and rated output by electric cup, design corresponding resistance value, and put it into the electric cup bottom, connect with the mains, can obtain the insulation electric cup of different shape.
Embodiment 3: in 90 kilograms of suspension injecting tetrafluoroethylene resins, add 7 kilograms in 3 kilograms of form of powdery particles carbon blacks and graphite, fully evenly mixed in the adding mixing tank, compression molding in the compound adding cylindrical die, moulding pressure is 50MPa/cm
2, put into the sintering oven sintering after the depanning, sintering temperature is 380 ℃, comes out of the stove after the cooling, becomes bar-shaped through machined into.With the PTFE rod that makes size and rated output by electric heating vessel, design corresponding resistance value, and put it in the electric heating vessel, connect with the mains, can obtain corrosion resistant calrod.
Claims (4)
1, the preparation method of tetrafluoroethylene thermo electric material adds conductive carbon black, graphite material in tetrafluoroethylene, it is characterized in that: preparation technology may further comprise the steps:
A, be base material, add form of powdery particles conductive carbon black, graphite material therein, carry out dry mixed through mixer with the suspension injecting tetrafluoroethylene resin,
B, directly compound is added mould, puts into the press pre-molding and make blank,
C, blank is put into the sintering oven sintering then,
Can utilize machined into to become the tetrafluoroethylene thermo electric material of various geometrical shapies after d, the cooling.
2, the preparation method of tetrafluoroethylene thermo electric material according to claim 1 is characterized in that: the weight proportion of three kinds of raw materials is: suspension injecting tetrafluoroethylene resin 70-90 part, carbon black 1-10 part, graphite 5-20 part.
3, the preparation method of tetrafluoroethylene thermo electric material according to claim 1 is characterized in that: preformed pressure is controlled at 20-60MPa/cm
2
4, the preparation method of tetrafluoroethylene thermo electric material according to claim 1 is characterized in that: sintering temperature is controlled at 340 ℃-390 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031148336A CN1253504C (en) | 2003-01-10 | 2003-01-10 | Preparation method of teflon electrothermal material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031148336A CN1253504C (en) | 2003-01-10 | 2003-01-10 | Preparation method of teflon electrothermal material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1515620A CN1515620A (en) | 2004-07-28 |
| CN1253504C true CN1253504C (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB031148336A Expired - Fee Related CN1253504C (en) | 2003-01-10 | 2003-01-10 | Preparation method of teflon electrothermal material |
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| CN (1) | CN1253504C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481483B (en) * | 2009-02-12 | 2011-03-16 | 广州市东泓橡塑制品有限公司 | Antistatic teflon film and preparation thereof |
| CN101831123B (en) * | 2010-04-22 | 2012-01-11 | 武汉大学 | Macromolecular nanocomposite conductive film and preparation method thereof |
| US20150200402A1 (en) * | 2012-07-06 | 2015-07-16 | Daikin Industries, Ltd. | Sheet, electrode and fuel cell |
| CN102821495A (en) * | 2012-08-17 | 2012-12-12 | 慈溪市圣唯诺电器有限公司 | Polytetrafluoroethylene (PTFE) base electrothermal thick film and manufacturing method thereof |
| RU2573594C1 (en) * | 2014-08-07 | 2016-01-20 | Общество с ограниченной ответственностью "Инжиниринговая компания "Теплофон" | Resistive carbon composite material |
| CN105295269B (en) * | 2015-11-20 | 2017-12-19 | 沈阳黎明航空发动机(集团)有限责任公司 | A kind of preparation method for filling graphite polytetrafluoroethylmaterial material |
| DE102018000935B4 (en) * | 2017-11-28 | 2022-12-22 | Carl Freudenberg Kg | sealing arrangement |
| CN109401148A (en) * | 2018-11-12 | 2019-03-01 | 佛山市纳博工业设备有限公司 | A kind of resin conductive ring of high-pressure electrostatic spray gun and preparation method thereof |
| CN112143144A (en) * | 2020-08-20 | 2020-12-29 | 湖北艾克尔工程塑料有限公司 | Polytetrafluoroethylene conductive film and manufacturing method thereof |
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| CN1515620A (en) | 2004-07-28 |
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Granted publication date: 20060426 Termination date: 20120110 |