CN1211507C - Conductive fiber and preparing method - Google Patents
Conductive fiber and preparing method Download PDFInfo
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- CN1211507C CN1211507C CN 03115681 CN03115681A CN1211507C CN 1211507 C CN1211507 C CN 1211507C CN 03115681 CN03115681 CN 03115681 CN 03115681 A CN03115681 A CN 03115681A CN 1211507 C CN1211507 C CN 1211507C
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- carbon black
- vinyl acetate
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Abstract
The present invention relates to a conductive fiber and a preparing method thereof. The conductive fiber comprises polyethylene glycol terephthalate, polythene vinyl acetate and conductive carbon black, wherein the weight ratio of the polyethylene glycol terephthalate to the polythene vinyl acetate is 100: 9 to 25: 6 to 15. The preparing method of the conductive fiber comprises the following steps: firstly, the conductive carbon black and the polythene vinyl acetate are uniformly mixed into a mixture; secondly, the polyethylene glycol terephthalate is added in the mixture of the conductive carbon black and the polythene vinyl acetate to form a mixture of three components; finally, the conductive fiber is prepared by spinning. The conductive fiber disclosed in the present invention has the advantages of low black carbon content and good conductive effects; spinning can be carried out by a spinning machine with a single threaded rod, the device investment of enterprises is reduced, and the preparation technique of the conductive fiber is simplified. The conductive fiber can be used as an anti-static material in the fields of clothing, decorative cloth, conveyer belts, etc.
Description
Technical field
The present invention relates to a kind of conductive fiber and preparation method thereof, particularly relating to a kind of is the conductive fiber and preparation method thereof of main raw material with the macromolecular material.
Background technology
Most macromolecular materials are insulating materials, and the chemical fibre by macromolecular material is made equally also has insulating properties as terylene, polypropylene fibre, polyamide fibre, acrylic fibers etc.These chemical fibres in use static constantly accumulate, and electric charge can't discharge, and finally have than higher electromotive force.Chemical fibre with static bring serious threat can for the safety in production of gas station, oil depot and some special occasions.The chemical fibre clothes also can bring adverse effect to health owing to often have static.
Solve the adverse effect that this class chemical fibre static brings, at present main way is to manage to allow originally nonconducting Polymer Synthesizing fiber conduction.For example, Chinese patent application number is 92108939.2, publication number is CN1082644A, open day is on February 23rd, 1994, name be called " compounding method of conductive fiber and conductive fabric " disclose cathode copper, pure tungsten, nickel prepared electrolysis by a certain percentage after, fiber and the cloth that cleaned is carried out electric plating method.This method is carried out antistatic treatment to it after science fabric is shaped, weak point is that the antistatic textile washing durability for preparing is relatively poor.Ultrafine metal fibers sneaked in yarn or the textiles also has obvious effects to eliminating chemical fibre static, but this kind fabric feel is relatively poor, weaves also relatively difficulty.At present, eliminating chemical fibre static best bet is the development conductive fiber, promptly sneaks into a certain amount of conductive component in the spinning of fiber, makes fiber directly have the ability of conduction, reaches antistatic purpose.Conductive carbon black is the first-selection of general conductive fiber conductive component, and the preparation method of present conductive fiber and conductive fiber need add a large amount of conductive carbon blacks and have good electrical conductivity to guarantee product in fiber.The amount of conductive carbon black in fiber will and require conductive carbon black evenly to disperse in fiber above 20%, this causes preparation technology's more complicated of conductive fiber, and the carbon black of high-load has destroyed the spinning rheological property of polymer in the product, makes fibre-forming performance, the mechanical property variation of polymer.The conductive fiber of this high carbon black content is carried out spinning then need to adopt composite spinning technology.So-called composite spinning technology is to contain the fibre fractionation of a large amount of carbon blacks as core, the fibre fractionation that does not contain carbon black is as cortex, form core-skin layer structure, use the twin-screw spinning machine equipment to carry out spinning, this causes the business equipment input to increase, technological parameter increases, to the control difficulty increase of product.
Summary of the invention
The objective of the invention is to overcome the shortcoming that conductive fiber and preparation method thereof in the past exists, provide that a kind of conductive effect is good, carbon black content is low, be easy to conductive fiber of spinning and preparation method thereof.
In order to realize purpose of the present invention, the present invention is by the following technical solutions: a kind of conductive fiber, it is characterized in that this conductive fiber is made up of polyethylene terephthalate, polyethylene vinyl acetate and conductive carbon black three components, wherein polyethylene terephthalate, polyethylene vinyl acetate and conductive carbon black weight ratio are 100: 9～25: 6～15, described polyethylene terephthalate is the normal polyester section that the weaving terylene is used, described polyethylene vinyl acetate is the copolymer of ethene and vinyl acetate, and described conductive carbon black particle diameter is 0.1 μ m～10 μ m.
Described conductive carbon black particle diameter is 0.1 μ m～1 μ m.
The percentage by weight of described conductive carbon black in conductive fiber is less than or equal to 10% greater than 5%.
A kind of preparation method of conductive fiber, in turn include the following steps: a. put into conductive carbon black and polyethylene vinyl acetate in the high-speed mixer in 1: 1～1: 2 according to weight ratio, the control mixing temperature is at 100 ℃～120 ℃, make described conductive carbon black and described polyethylene vinyl acetate be mixed into uniform blend, then to the cooling of described blend and that it is ground into graininess is stand-by; B. the conductive carbon black of step a preparation and the blend and the polyethylene terephthalate of polyethylene vinyl acetate are joined in the double screw extruder according to certain ratio, the control extrusion temperature is at 270 ℃～290 ℃, described blend and described polyethylene terephthalate are mixed and prepares the section particle of the conductive carbon black, polyethylene vinyl acetate and polyethylene terephthalate three blend of components that are suitable for spinning through granulation; C. section particle vacuumize in vacuum drying oven of conductive carbon black, polyethylene vinyl acetate and polyethylene terephthalate three blend of components that step b is prepared adopts conventional single extruder type spinning machine with conventional spinning, drawing process described section particle preparation to be become conductive fiber then.
The blend of conductive carbon black described in the step b and polyethylene vinyl acetate and described polyethylene terephthalate percentage by weight are 15～38: 100.
The invention has the beneficial effects as follows: described conductive fiber and preparation method thereof technology is simple, production efficiency is high, and the conductive fiber carbon black content of preparation is low, conductive effect good.Described conductive fiber can carry out spinning by enough single extruder type spinning machines, has reduced the input of enterprise's spinning equipment, has simplified the production technology of conductive fiber.Conductive fiber provided by the invention can be used as anti-static material in fields such as clothes, bunting, transport tapes.
Description of drawings
Fig. 1 is conductive fiber preparation flow figure
EVA is the abbreviation of polyethylene vinyl acetate among Fig. 1, polyester is the abbreviation of polyethylene terephthalate, blend is the abbreviation of conductive carbon black and polyethylene vinyl acetate blend, and the section particle is the abbreviation of conductive carbon black, polyethylene vinyl acetate and polyethylene terephthalate three blend of components section particle.
The specific embodiment
Below in conjunction with conductive fiber preparation flow figure, the present invention is described in further detail: a kind of conductive fiber, it is characterized in that this conductive fiber is by polyethylene terephthalate, polyethylene vinyl acetate and conductive carbon black three components are formed, polyethylene terephthalate wherein, polyethylene vinyl acetate and conductive carbon black weight ratio are 100: 9～25: 6～15, described polyethylene terephthalate is the normal polyester section that the weaving terylene is used, described polyethylene vinyl acetate is the copolymer of ethene and vinyl acetate, and described conductive carbon black particle diameter is 0.1 μ m～10 μ m.Described conductive carbon black particle diameter is 0.1 μ m～1 μ m.The percentage by weight of described conductive carbon black in conductive fiber is less than or equal to 10% greater than 5%.A kind of preparation method of conductive fiber, in turn include the following steps: a. put into conductive carbon black and polyethylene vinyl acetate in the high-speed mixer in 1: 1～1: 2 according to weight ratio, the control mixing temperature is at 100 ℃～120 ℃, make described conductive carbon black and described polyethylene vinyl acetate be mixed into uniform blend, then to the cooling of described blend and that it is ground into graininess is stand-by; B. the conductive carbon black of step a preparation and the blend and the polyethylene terephthalate of polyethylene vinyl acetate are joined in the double screw extruder according to certain ratio, the control extrusion temperature is at 270 ℃～290 ℃, described blend and described polyethylene terephthalate are mixed and prepares the section particle of the conductive carbon black, polyethylene vinyl acetate and polyethylene terephthalate three blend of components that are suitable for spinning through granulation; C. section particle vacuumize in vacuum drying oven of conductive carbon black, polyethylene vinyl acetate and polyethylene terephthalate three blend of components that step b is prepared adopts conventional single extruder type spinning machine with conventional spinning, drawing process described section particle preparation to be become conductive fiber then.The blend of conductive carbon black described in the step b and polyethylene vinyl acetate and described polyethylene terephthalate percentage by weight are 15～38: 100.
Low carbon black provided by the invention contains " two conduction diafiltration fault value " theoretical and polymer rheology principle that weight polyester conductive fiber product and preparation method have mainly utilized conducting particles and polymer.Different with traditional conducting particles/polyblend theory, " two conductivity percolation threshold " theory does not require that conducting particles is dispersed in the polymer fully, forms conductive network mutually but require conducting particles to have one of one's own in polymer.According to " two conductivity percolation threshold " theory, the macromolecular material of state of insulation just can form conductive channel under the very small amount of carbon black conductive particle situation of interpolation, play the effect of conduction.So utilize the conductive fiber of this principle preparation, carbon black content is low, electrical conductivity is high, antistatic effect is good.The polyethylene vinyl acetate that uses in the invention is called for short EVA, plays the 3rd component effect between polyester and conducting particles, assists conductive carbon black and polyethylene terephthalate to be called for short the polyester blend system and forms " two conductivity percolation threshold ".Mainly be because the viscosity of the ratio of viscosities polyester of EVA is little under identical temperature, under the effect of spinneret orifice place shear stress, EVA tends to assemble at cortex, polyester is assembled at sandwich layer, and the effect of conductive carbon black and EVA causes conductive carbon black to distribute few at the cortex distributed multi-core layer of conductive fiber more greatly, conductive carbon black has formed inhomogeneous dispersion in conductive fiber, self constitutes conductive network.Above-mentioned reaction has also utilized the rheology principle of polymer simultaneously.Experimental result shows that even add a spot of conductive carbon black in polyester, fiber also has certain electric conductivity.A spot of carbon black particle is less to the mechanical property influence of the rheological property of polymer and fiber, therefore can use single screw spinning equipment to carry out spinning, and this just greatly reduces the input expense of spinning equipment, has simplified the spinning technique of conductive fiber.
Following illustrative embodiment helps further to understand the present invention.
Embodiment 1
Conductive carbon black and 15 parts of EVA of being 0.5 μ m with 9 parts of average diameters according to parts by weight put in the high-speed mixer, are heated to lower the temperature after 105 ℃ and be ground into graininess.Blend and 100 parts of polyester of gained graininess carbon black and EVA are joined in the double screw extruder, and extruder temperature remains on 280 ℃, and mixed material is prepared the blend section particle of the conductive carbon black/EVA/ polyester that is used for spinning through high speed shear, granulation.Gained blend section particle is dry in vacuum drying oven, adopt conventional single extruder type spinning machine, conventional spinning technique and drawing process are prepared described conductive fiber.Test shows, the percentage by weight of carbon black is 7.2% in described conductive fiber, the conductive fiber electrical conductivity is 3 * 10
-7S/cm, S=1/ Ω.Fig. 1 has provided described conductive fiber preparation method's flow process.
Embodiment 2-5, the preparation flow of described conductive fiber is identical with embodiment 1, and other condition sees Table 1.
Table 1 embodiment 2-5
| The embodiment numbering | Polyester (part) | Conductive carbon black (part) | Carbon black average diameter (μ m) | EVA (part) | The percentage by weight (%) of carbon black in fiber | The electrical conductivity of fiber (S/com) |
| 2 | 100 | 6 | 0.1 | 9 | 5.2 | 1×10 -7 |
| 3 | 100 | 9 | 0.3 | 12 | 7.4 | 8×10 -5 |
| 4 | 100 | 10 | 1 | 20 | 7.7 | 2×10 -4 |
| 5 | 100 | 14 | 3 | 24 | 10 | 5×10 -3 |
Claims (4)
1. conductive fiber, it is characterized in that this conductive fiber is made up of polyethylene terephthalate, polyethylene vinyl acetate and conductive carbon black three components, wherein polyethylene terephthalate, polyethylene vinyl acetate and conductive carbon black weight ratio are 100: 9～25: 6～15, described polyethylene terephthalate is the normal polyester section that the weaving terylene is used, described polyethylene vinyl acetate is the copolymer of ethene and vinyl acetate, and described conductive carbon black particle diameter is 0.1 μ m～10 μ m.
2. conductive fiber according to claim 1 is characterized in that described conductive carbon black particle diameter is 0.1 μ m～1 μ m.
3. conductive fiber according to claim 1 is characterized in that the percentage by weight of described conductive carbon black in conductive fiber greater than 5%, is less than or equal to 10%.
4. claim 1 or 2 or 3 described conductive fiber preparation methods is characterized in that this method in turn includes the following steps:
A. described conductive carbon black and described polyethylene vinyl acetate were put in the high-speed mixer according to weight ratio in 1: 1～1: 2, the control mixing temperature is at 100 ℃～120 ℃, make described conductive carbon black and described polyethylene vinyl acetate be mixed into uniform blend, then to the cooling of described blend and that it is ground into graininess is stand-by;
B. be that 15%～38% ratio joins in the double screw extruder with the blend of the conductive carbon black of step a preparation and polyethylene vinyl acetate and described polyethylene terephthalate percentage by weight, the control extrusion temperature is at 270 ℃～290 ℃, described blend and described polyethylene terephthalate are mixed and prepares the section particle of the conductive carbon black, polyethylene vinyl acetate and polyethylene terephthalate three blend of components that are suitable for spinning through granulation;
C. section particle vacuumize in vacuum drying oven of conductive carbon black, polyethylene vinyl acetate and polyethylene terephthalate three blend of components that step b is prepared adopts conventional single extruder type spinning machine with conventional spinning, drawing process described section particle preparation to be become conductive fiber then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03115681 CN1211507C (en) | 2003-03-06 | 2003-03-06 | Conductive fiber and preparing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03115681 CN1211507C (en) | 2003-03-06 | 2003-03-06 | Conductive fiber and preparing method |
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| CN1438363A CN1438363A (en) | 2003-08-27 |
| CN1211507C true CN1211507C (en) | 2005-07-20 |
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| CN 03115681 Expired - Fee Related CN1211507C (en) | 2003-03-06 | 2003-03-06 | Conductive fiber and preparing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455621C (en) * | 2006-02-05 | 2009-01-28 | 丁宏广 | Conductive mother paticle, conductive polymer filament, its production and use |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100482738C (en) * | 2006-07-04 | 2009-04-29 | 薛纪良 | High heat absorbing type PET bottle grade polyester sheet and its preparation method |
| CN105155024A (en) * | 2015-10-26 | 2015-12-16 | 太仓市双宇化纤有限公司 | Conductive composite fiber material and preparation method thereof |
| CN105610306B (en) * | 2016-03-01 | 2018-12-11 | 深圳南云微电子有限公司 | Secondary side feedback control method and its control circuit |
-
2003
- 2003-03-06 CN CN 03115681 patent/CN1211507C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100455621C (en) * | 2006-02-05 | 2009-01-28 | 丁宏广 | Conductive mother paticle, conductive polymer filament, its production and use |
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| CN1438363A (en) | 2003-08-27 |
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