CN1201358A - Conductive exothermal non-woven fabric and production method therefor - Google Patents
Conductive exothermal non-woven fabric and production method therefor Download PDFInfo
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- CN1201358A CN1201358A CN 97104369 CN97104369A CN1201358A CN 1201358 A CN1201358 A CN 1201358A CN 97104369 CN97104369 CN 97104369 CN 97104369 A CN97104369 A CN 97104369A CN 1201358 A CN1201358 A CN 1201358A
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- carbon fiber
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Abstract
The present invention relates to a conductive heat-producing adhesive-bonded fabric and its preparation method. Said adhesive-bonded fabric is made up by using synthetic fibre, carbon fibre as conducting phase and fibrous adhesive as raw material, through water phase dispersion by using polymeric dispersant agent, defibering and mixing, and adopting wet adhesive-bonded fabric forming process. Said invented adhesive-bonded fabric features light weight, uniformly producing heat, safe, reliable and high thermal efficiency, so that it can be extensively used for heating facilities in industrial fields and household heating.
Description
The invention relates to the technology of preparing of conductive exothermal material, especially about electric conduction of carbon fiber exothermal non-woven fabric and manufacture method thereof.
As everyone knows, industry on the market and civilian heating power electric heater, heater or warmer, the conductive heating unit that it adopted is generally conductive heating units such as infrared lamp, metallic resistance silk.These conductive heating units are because its electrical power density is big, heating is concentrated, and therefore, fail safe is not good enough.For the conductive exothermal that makes infrared lamp or metallic resistance silk spreads all in desired areal extent, often need in heating or heating facility, put infrared lamp or be the metallic resistance silk of snakelike shape by polygamy, this has not only strengthened the weight of facility, increase cost, and in use have unsafe factor.Thereby the conductive heating unit of infrared lamp and this class of metallic resistance silk is having tangible weak point aspect heating uniformity, the heat efficiency and the fail safe.
In recent years, along with the continually developing and using of high function carbon fiber, the papery electric conduction of carbon fiber exothermic material of above-mentioned conductive heating unit shortcoming has appearred on the market overcoming.The prior art of this papery electric conduction of carbon fiber exothermic material, on June 19th, 1996, disclosed Chinese patent CN 1124907 A disclosed.The carbon fibre composite paper that the conductive exothermal of China publication CN 1124907 A is used is to be conductive phase by carbon fiber, with the cellulose pulp is matrix, carbon fiber disperses with the dispersant water, and with finely dispersed fiber mixing, paper technology routinely is prepared from again.But this papery electric conduction of carbon fiber exothermic material has the general property of paper after all, and promptly its mechanical strength is lower, especially thermal endurance is relatively poor, thereby influenced its serviceability, particularly voltage is when upwards fluctuation is bigger during use, and its safety in utilization aspect is particularly not enough.
At the existing shortcoming of above-mentioned papery electric conduction of carbon fiber exothermic material, the invention provides a kind of electric performance stablity, temperature resistant grade is higher, mechanical strength is good conductive exothermal carbon fiber nonwoven fabric material.Conductive exothermal non-woven fabric material of the present invention is the fibre adhesive by synthetic fibers, conductive phase carbon fiber and a bonding humidification, adopts the manufacturing of wet nonwoven fabrics molding technology thereof to form.
In the present invention, selected a kind of synthetic fibers can be chosen any one kind of them from synthetic fibers such as polyester fiber, Fypro, polypropylene fiber and vinylon fibre, and it prescinds length, is generally 2mm～25mm, is preferably 5mm～15mm.
In the present invention, selected conductive phase carbon fiber can be chosen any one kind of them from polyacrylonitrile-based carbon fibre, asphalt base carbon fiber and viscose base carbon fibre.It prescinds length and is generally 1mm～25mm, is preferably 3mm～12mm, and its resistivity is generally 3 * 10
-3Ω cm～9 * 10
-3Ω cm.Carbon content 〉=95%.
In the present invention since synthetic fibers and carbon fiber not only its chopped fibres length is longer, and be the hydrophobic fibre raw material, have the height chemical stability, so these two kinds of fibrous raw materials are difficult in water disperseing.The present invention has selected for use and can disperse a kind of high molecular polymer dispersant that synthetic fibers again can the dispersed carbon fiber, it is poly-to make above-mentioned fibrous raw material not wad a quilt with cotton in the even dispersion of high molecular polymer dispersant aqueous phase of the present invention, thereby obtains to be beneficial to the homodisperse fibre blend slurry of moulding.The high molecular polymer dispersant that the present invention is selected is a kind of anion-polyacrylamide dispersant, and its addition is generally 2%～15% (weight meter), is preferably 5%～10% (weight meter).
In the present invention, adopt the wet nonwoven fabrics molding technology thereof, the principle that bond strength produces between the fiber in the moulding nonwoven fabrics and traditional string papermaking are different, its difference is that above-mentioned interfibrous bond strength is not to handle by making beating to obtain, but has good binding intensity between fiber by making with its bonding humidification with addition of a kind of adhesive.The present invention has selected fibre adhesive for use, as vinal, polyethylene-polypropylene fiber and low melting point polyester fiber etc.It prescinds length is 2mm～8mm, and its addition is 8%～20% scope (a weight meter), is preferably in 10%～15% scope (weight meter).
Conductive exothermal non-woven fabric manufacture method of the present invention comprises and selects materials, prepares burden, mixes, discongests dispersion, dilution, shaping, squeezing, drying, coiling process.The manufacture method of conductive exothermal non-woven fabric of the present invention such as process chart.
According to manufacture method of the present invention, a kind of synthetic fibers of the above-mentioned length that first handle is selected for use and fibre adhesive are sent in the fluffer and are put into dispersant and discongest and dispersion treatment in aqueous phase, the carbon fiber of then putting into above-mentioned length again carries out dispersion treatment, be mixed with even dispersed mixture slurry, wet moulding nonwoven fabrics on common cylinder mould machine or long mesh paper making machine former then, after air draught-squeezing, enter the Yang Keshi cylinder dried, batch, thereby make conductive exothermal non-woven fabric of the present invention, it quantitatively is generally 20g/m
2～150g/m
2, be preferably 40g/m
2～100g/m
2Carbon fiber content accounts for 2%～50% of nonwoven fabrics weight, is preferably 10%～30%.
According to the prepared conductive exothermal non-woven fabric of manufacture method of the present invention, its surfacing, quality is pliable and tough well-pressed, and have good mechanical strength performance and a thermal endurance, with it as the conductive heating unit material time spent, because whole of material has formed conductive path, power density is little, heat efficiency height, thermal radiation is good, harmful to human not, safe and reliable, therefore making the conductive heating unit material with carbon fiber nonwoven fabric of the present invention has high thermal efficiency, the all even advantage safe and convenient to use of generating heat, conductive exothermal non-woven fabric particularly of the present invention has thermal endurance and the mechanical strength properties higher than papery conductive exothermal material, this electric conduction of carbon fiber exothermal non-woven fabric of the present invention that just allows to use as the conductive heating unit material uses under voltage superelevation surging condition, and promptly this material can tolerate bigger power density.Specifically, the power density of papery conductive exothermal material must be controlled at 0.139w/cm
2Below, nonwoven fabrics conductive exothermal material of the present invention then can be 0.16w/cm
2～0.18w/cm
2, even higher, the conductive exothermal non-woven fabric of the present invention under this power density still keeps the favorable conductive heating property, and safe and reliable.
Electric conduction of carbon fiber exothermal non-woven fabric of the present invention is processed into the wall painting type electric heating plate that overall dimension is 1080mm * 770mm, under voltage 220V, energising heating under 20 ℃ of conditions of room temperature, the electric heating plate surface temperature rises to 80 ℃.
Electric conduction of carbon fiber exothermal non-woven fabric of the present invention, it has wide range of applications, and constantly enlarges.For example, as the conductive heating unit material, be widely used on the heat tracing equipment in the industrial and agricultural production, and be used for such as factory building, arenas, room, face the warming installation of various occasions such as building, also can be applicable in the health care goods such as roaster, electric drying room.In addition, by adjustment, also can be made into electromagnetic shielding material and anti-static material to carbon fiber content in nonwoven fabrics.
Embodiment
With following embodiment and Comparative Examples the present invention is described.
Preparation content 25% (weight meter) asphalt base carbon fiber conductive exothermal vinylon fibre nonwoven fabrics.
To prescind vinylon fibre and the adhesive type vinal that length is respectively 6mm and 4mm earlier knocks down in the fluffer that contains the 8% anion-polyacrylamide dispersant that accounts for fibre weight together, mix at aqueous phase, discongest and dispersion treatment, then, drop into the long asphalt base carbon fiber of 6mm again and discongest and dispersion treatment, be uniformly mixed into stable dispersion liquid with vinylon fibre and vinal adhesive, send traditional cylinder mould machine or long mesh paper making machine wet end to, the wet moulding nonwoven fabrics, behind air bleed press, enter the Yang Keshi drying cylinder and carry out drying, batch, quantitatively be 51g/m thereby make
2, thickness is the conductive exothermal non-woven fabric of the present invention of 0.17mm.
Comparative Examples
Except by beating degree be 30 ° of SR wood pulps replace among the embodiment synthetic fibers and not with addition of fibre adhesive, other preparation section is copied the conductive exothermal paper made from the carbon fiber content among the embodiment as embodiment according to the paper method of copying of routine.
Performance to embodiment of the invention conductive exothermal non-woven fabric and Comparative Examples conductive exothermal paper is measured respectively, and table 1 is listed in its measurement result contrast.
Table 1
| Carbon fiber content % | Quantitative g/m 2 | Tightness g/cm | Fracture length m | Folding (indulging) is inferior | Allow maximum power density w/cm 2 | Resistance value Ω (400mm * 200 samples) | |
| Embodiment | ??25 | ??50.6 | ??0.28 | ??9875 | ?＞4000 | ??0.180 | ??2300 |
| Comparative Examples | ??25 | ??60.2 | ??0.34 | ??3620 | ??20 | ??0.139 | ??2000 |
As seen from Table 1, the conductive exothermal non-woven fabric of wet moulding of the present invention has higher mechanical strength and better thermal endurance than the conductive exothermal paper with carbon fiber content.The reason that obtains good result like this is that the present invention has selected for use chemical stability height, heat-resisting synthetic fibers preferably to make the main body fiber, conductive phase is a carbon fiber and with addition of fibre adhesive, in the cylinder dried process, because the acting in conjunction of humidity and temperature makes vinal shape adhesive melt and dissolved, cause the composition fiber in the nonwoven fabrics adhered to one another, and then make and produced bond strength between fiber.
Claims (6)
1. the electric conduction of carbon fiber exothermic material of using as the conductive heating unit material, by carbon fiber and cellulose pulp as conductive phase is raw material, carbon fiber disperses at aqueous phase with dispersant, then mix with cellulose pulp, a kind of electric conduction of carbon fiber heating paper material that adopts the copying the paper technology of routine and make, the invention is characterized in that the electric conduction of carbon fiber exothermic material is by synthetic fibers, carbon fiber and fibre adhesive as conductive phase are raw material, mix at the aqueous phase that contains the high molecular polymer dispersant, disperse, a kind of electric conduction of carbon fiber exothermal non-woven fabric material that adopts the wet nonwoven fabrics forming method to make, the conductive phase carbon fiber accounts for the percentage of moulding nonwoven fabrics weight, be generally 2%～50%, be preferably 10%～30%, the nonwoven fabrics of moulding is quantitative, is generally 20g/m
2～150g/m
2, be preferably 40g/m
2～100g/m
2
2. according to the described electric conduction of carbon fiber exothermic material of claim 1, it is characterized in that the synthetic fibers used as raw material, conductive phase carbon fiber and fibre adhesive are respectively,
(1) synthetic fibers, these class synthetic fibers are polyester fiber, Fypro, polypropylene fiber and vinylon fibre etc. can therefrom be chosen any one kind of them, and it prescinds length and is generally 2mm～25mm, is preferably 5mm～15mm,
(2) carbon fiber as conductive phase is a polyacrylonitrile-based carbon fibre, and asphalt base carbon fiber and viscose base carbon fibre can therefrom be chosen any one kind of them, and it prescinds length and is generally 1mm～25mm, is preferably 3mm～12mm, and its resistivity is 3 * 10
-3Ω cm～9 * 10
-3Ω cm, carbon content 〉=95%,
(3) fibre adhesive, this class adhesive is a vinal, and polyethylene-polypropylene fiber and low melting point polyester fiber adhesive can therefrom be chosen any one kind of them, and its chopped fibres length is in 2mm～8mm scope.Its addition is 8%～20% scope (a weight meter), is preferably in 10%～15% scope (weight meter).
3. according to claim 1 and 2 described electric conduction of carbon fiber exothermic materials, wherein synthetic fibers are a kind of vinylon fibres, are a kind of asphalt base carbon fibers as the conductive phase carbon fiber, and fibre adhesive is a kind of vinal adhesive.
4. according to claim 1,2 and 3 described electric conduction of carbon fiber exothermic materials, it is characterized in that selected high molecular polymer dispersant is a kind of anion-polyacrylamide, its addition is generally 2%～15% (weight meter), is preferably 5%～10% (weight meter).
5. method of making the described electric conduction of carbon fiber exothermic material of claim 1, comprise and selecting materials, batching, mix, discongest dispersion, dilution, operations such as moulding, it is characterized in that in selecting materials, select a kind of synthetic fibers for use, conductive phase carbon fiber and with addition of fibre adhesive is mixing, discongest in the dispersion step, the synthetic fibers that to handle without making beating and fibre adhesive mix and discongest dispersion treatment in the aqueous phase that contains dispersant earlier, then add carbon fiber,, mix and disperse and the uniform slurry of furnishing through discongesting, air bleed press is passed through in moulding on conventional cylinder mould machine or long mesh paper making machine, cylinder dried operation and make and have good mechanical strength performance and stable on heating nonwoven fabrics.
6. according to the electric conduction of carbon fiber exothermal non-woven fabric material of claim 1 to 5, be suitable for as industry or civilian heating, the planar conductive heating unit material usefulness on insulation and the heating facility, and can be widely used on the medical health care products, and make anti-static material and use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97104369 CN1201358A (en) | 1997-05-29 | 1997-05-29 | Conductive exothermal non-woven fabric and production method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97104369 CN1201358A (en) | 1997-05-29 | 1997-05-29 | Conductive exothermal non-woven fabric and production method therefor |
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| Publication Number | Publication Date |
|---|---|
| CN1201358A true CN1201358A (en) | 1998-12-09 |
Family
ID=5167308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97104369 Pending CN1201358A (en) | 1997-05-29 | 1997-05-29 | Conductive exothermal non-woven fabric and production method therefor |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391311C (en) * | 2003-11-17 | 2008-05-28 | 李家俊 | Method for fabricating heating element and electrode lead in carbon fiber far infrared electric heating tube |
| CN101765419A (en) * | 2007-07-31 | 2010-06-30 | 金伯利-克拉克环球有限公司 | sensor products using conductive webs |
| CN102046872A (en) * | 2008-05-29 | 2011-05-04 | 金伯利-克拉克环球有限公司 | Conductive webs containing electrical pathways and method for making same |
| CN103173192A (en) * | 2013-02-05 | 2013-06-26 | 武汉国灸科技开发有限公司 | Flexible sheet iron heating material and method for producing same |
| CN103374852A (en) * | 2012-04-19 | 2013-10-30 | 广东省造纸研究所 | Manufacture method of sisal fiber wet nonwoven fabric |
| CN103556524A (en) * | 2013-09-16 | 2014-02-05 | 王霄飞 | Production technology for carbon fiber paper steel |
| CN107696783A (en) * | 2017-10-27 | 2018-02-16 | 六安市九十里山水画廊有限公司 | A kind of calligraphy and painting dampproof protection against insects method |
| CN109629312A (en) * | 2018-12-27 | 2019-04-16 | 中国林业科学研究院林产化学工业研究所 | A kind of method of controllable carbon fiber paper far-infrared radiation intensity |
| CN114567941A (en) * | 2022-03-11 | 2022-05-31 | 郑州大学 | Method for preparing electrothermal heating sheet by using carbon fiber braided fabric leftover material |
-
1997
- 1997-05-29 CN CN 97104369 patent/CN1201358A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391311C (en) * | 2003-11-17 | 2008-05-28 | 李家俊 | Method for fabricating heating element and electrode lead in carbon fiber far infrared electric heating tube |
| CN101765419A (en) * | 2007-07-31 | 2010-06-30 | 金伯利-克拉克环球有限公司 | sensor products using conductive webs |
| CN101765419B (en) * | 2007-07-31 | 2013-12-18 | 金伯利-克拉克环球有限公司 | Sensor products using conductive webs |
| CN102046872A (en) * | 2008-05-29 | 2011-05-04 | 金伯利-克拉克环球有限公司 | Conductive webs containing electrical pathways and method for making same |
| CN103374852B (en) * | 2012-04-19 | 2017-06-06 | 广东省造纸研究所 | A kind of manufacture method of sisal fiber wet nonwoven fabrics |
| CN103374852A (en) * | 2012-04-19 | 2013-10-30 | 广东省造纸研究所 | Manufacture method of sisal fiber wet nonwoven fabric |
| CN103173192A (en) * | 2013-02-05 | 2013-06-26 | 武汉国灸科技开发有限公司 | Flexible sheet iron heating material and method for producing same |
| CN103173192B (en) * | 2013-02-05 | 2015-05-13 | 武汉国灸科技开发有限公司 | Flexible sheet iron heating material and method for producing same |
| CN103556524A (en) * | 2013-09-16 | 2014-02-05 | 王霄飞 | Production technology for carbon fiber paper steel |
| CN107696783A (en) * | 2017-10-27 | 2018-02-16 | 六安市九十里山水画廊有限公司 | A kind of calligraphy and painting dampproof protection against insects method |
| CN109629312A (en) * | 2018-12-27 | 2019-04-16 | 中国林业科学研究院林产化学工业研究所 | A kind of method of controllable carbon fiber paper far-infrared radiation intensity |
| CN109629312B (en) * | 2018-12-27 | 2021-12-14 | 中国林业科学研究院林业新技术研究所 | Method for controlling far infrared radiation intensity of carbon fiber paper |
| CN114567941A (en) * | 2022-03-11 | 2022-05-31 | 郑州大学 | Method for preparing electrothermal heating sheet by using carbon fiber braided fabric leftover material |
| CN114567941B (en) * | 2022-03-11 | 2024-03-15 | 郑州大学 | Method for preparing electrothermal heating sheet by utilizing carbon fiber braided fabric leftover materials |
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