KR20180078144A - Conductive composite fiber - Google Patents

Abstract

According to an embodiment of the present invention, a conductive composite fiber includes a first region consisting of a first thermoplastic resin and a bundled carbon nanotube which is composed of a plurality of carbon nanotubes whose average outer diameter is 5-50 nm while inner diameter thereof is at least 40% of the average outer diameter. According to the present invention, it is possible to improve conductivity of the composite fiber.

Description

Conductive Composite Fiber {CONDUCTIVE COMPOSITE FIBER}

The present invention relates to a conductive composite fiber.

In the modern society, many efforts are being made to improve the performance of electroconductive fibers and to apply them to the inside of clothes. For example, smart wear has recently emerged as a future textile. The term "smartware" refers to a new concept of clothing that combines the functions of the textile (fabric) and the garment itself by sensing external stimuli, and the digitalized properties that conventional fibers do not possess. BT, ET, etc., It is a futuristic clothing of a new concept which is out of the concept of traditional textile or clothing. Typically, it is a high functional textile material garment including a digital sensor, GPS, and a microcomputer.

In order to make the textile industry more sophisticated and high value-added, it is urgently required to develop new fibers and smart wear that will present the extreme increase in material performance and maximize the performance. In order to realize such clothing, There is a need for techniques to induce and integrate them for product development or improvement.

In order to derive digitized garment products by integrating digital devices / functions, various technologies are required. Among them, important technology is connected to high value-added components such as digital devices or semiconductors integrated into clothes, Conductive fibers that connect digital devices or their components while not being damaged by effects.

In connection with this, research and development on conductive fibers, in which electricity easily flows, are actively under way. For example, Korean Patent Laid-Open No. 2008-0034824 discloses a conductive fiber and a brush using carbon black as a conductive component in a fiber-forming polymer, and Korean Patent Publication No. 2001-0050879 discloses a conductive polymer containing carbon black And a protective polymer layer for protecting the conductive polymer layer. However, since the fibers made of carbon black as the conductive material are very poor in conductivity and other electrical characteristics, there is a problem that it is extremely difficult to derive digitized clothing products by integrating digital devices / functions using such conductive fibers have.

Korean Patent Laid-Open Publication No. 2010-0033600 discloses a conductive composite fiber composed of a core material of a synthetic fiber material and a sheath including a polyamide and a carbon nanotube on the outside thereof. However, in this case, the drawability of the fibers is lowered and the frequency of disconnection in the production of the fibers is increased, resulting in a problem that the workability and process efficiency are lowered.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a conductive composite fiber excellent in conductivity and stretchability.

One aspect of the present invention includes a first region comprising a plurality of carbon nanotubes each having an average outer diameter of 5 to 50 nm and an average inner diameter of 40% or more of the average outer diameter, and a first thermoplastic resin , And a conductive composite fiber.

In one embodiment, the Raman spectroscopic intensity ratio (IG / ID) of the carbon nanotubes may be 1.0 or more.

In one embodiment, the carbon purity of the carbon nanotubes may be 95% or more.

In one embodiment, the average bundle diameter of the multicomponent carbon nanotubes may be 1 to 10 탆.

In one embodiment, the average bundle diameter of the multicomponent carbon nanotubes may be 10 to 100 탆.

In one embodiment, the conductive composite fiber may further include a second region including a second thermoplastic resin.

In one embodiment, the ratio of the cross section of the second region to the cross section of the conductive composite fiber may be 0.01 to 0.9.

In one embodiment, the first and second regions may be a sheath and a core, respectively.

In one embodiment, the first thermoplastic resin is a polyamide, a polyimide, a polyethylene, a polypropylene, a polyethylene copolymer, a polyester, a polyacrylonitrile, a polystyrene, a polycarbonate, an aramid, a polyethylene terephthalate, Styrene copolymers, styrene-ethylene-butadiene-styrene copolymers, styrene-ethylene-propylene-styrene copolymers, styrene-butadiene-styrene copolymers, styrene- ), Ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, maleic anhydride grafted polypropylene, maleic anhydride grafted linear low density Polyethylene, maleic anhydride grafted low density polyethylene, maleic acid Styrene-maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, polybutylene terephthalate, polytrimethylene terephthalate, and polylactic acid. And may include one or more selected components.

In one embodiment, the second thermoplastic resin is a polyamide, a polyimide, a polyethylene, a polypropylene, a polyethylene copolymer, a polyester, a polyacrylonitrile, a polystyrene, a polycarbonate, an aramid, a polyethylene terephthalate, Styrene copolymers, styrene-ethylene-butadiene-styrene copolymers, styrene-ethylene-propylene-styrene copolymers, styrene-butadiene-styrene copolymers, styrene- ), Ethylene-vinyl acetate copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, maleic anhydride grafted polypropylene, maleic anhydride grafted linear low density Polyethylene, maleic anhydride grafted low density polyethylene, maleic acid Styrene-maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, polybutylene terephthalate, polytrimethylene terephthalate, and polylactic acid. And may include one or more selected components.

In one embodiment, the first thermoplastic resin may be polyurethane, and the second thermoplastic resin may be polyamide.

In one embodiment, the first region may further include one conductive filler selected from the group consisting of fullerene, graphene, graphite, carbon fiber, carbon black, and a mixture of two or more thereof.

In one embodiment, 10 to 1,000 parts by weight of the conductive filler may be added to 100 parts by weight of the multicomponent carbon nanotubes.

According to an embodiment of the present invention, the conductivity of the composite fiber can be improved by adding a carbon nanotube having a controlled diameter, length, crystallinity, purity, etc. to the thermoplastic resin.

According to an embodiment of the present invention, the thermoplastic resin may include two or more different kinds of components to improve the stretchability of the conjugate fiber.

It should be understood that the effects of the present invention are not limited to the effects described above, but include all effects that can be deduced from the description of the invention or the composition of the invention set forth in the claims.

1 is a transmission electron microscope (TEM) image of a carbon nanotube according to an embodiment of the present invention.
2 is a scanning electron microscope (SEM) image showing the bundle length of the multicomponent carbon nanotubes according to an embodiment of the present invention.
3 is a scanning electron microscope (SEM) image showing the bundle diameter of the multicomponent carbon nanotubes according to an embodiment of the present invention.
4 is a cross-sectional view of a conductive conjugate fiber according to an embodiment of the present invention.
5 is a cross-sectional view of a conductive conjugate fiber according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "indirectly connected" . Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

One aspect of the present invention includes a first region comprising a plurality of carbon nanotubes each having an average outer diameter of 5 to 50 nm and an average inner diameter of 40% or more of the average outer diameter, and a first thermoplastic resin , And a conductive composite fiber.

The carbon nanotubes are materials for imparting electrical and thermal conductivity (hereinafter, referred to as " conductivity ") to a thermoplastic resin which is an insulator. The carbon nanotube is a material having a surface resistance The conductivity can be improved.

The carbon nanotubes can be classified into single wall carbon nanotubes, double wall carbon nanotubes, multi wall carbon nanotubes, truncated conical shapes, A cup-stacked carbon nanofiber in which a plurality of truncated graphene layers are stacked, and a mixture of two or more thereof, and preferably, But it is not limited thereto.

1 is a transmission electron microscope (TEM) image of a carbon nanotube according to an embodiment of the present invention. 1, the multicomponent carbon nanotube has a plurality of single-stranded multi-wall carbon nanotubes having an average outer diameter of 5 to 50 nm and an average inner diameter of 40% or more, and preferably 40 to 90% The tubes may co-aggregate and exist in bundle form. The outer diameter refers to the diameter of the carbon nanotube cross section including the graphite layer constituting the wall of the carbon nanotube, and the inside diameter refers to the diameter of the hollow cross section excluding the graphite layer.

If the average diameter of the single-stranded carbon nanotubes is less than 8 nm or more than 50 nm, the average bundle diameter of the multi-walled carbon nanotubes formed by aggregation of them is not controlled within the range described below. It may be preferable to use carbon nanotubes having a large number of carbon nanotubes. As used herein, the term "bundle " refers to a bundle or rope shape in which a plurality of carbon nanotubes are arranged side by side or mutually entangled, and in contrast, a plurality of carbon nanotubes do not have a constant shape If present, it may be called "off-duty type".

The multi-walled carbon nanotube may basically exist as a plurality of carbon nanotubes, preferably, a plurality of multi-walled carbon nanotubes co-aggregated. Each carbon nanotube and its bundle may be in a linear, curvilinear, or mixed form.

If the average diameter of the single-walled carbon nanotubes, that is, the multi-walled carbon nanotubes is less than 40% of the average outer diameter, the internal volume of the carbon nanotubes may be decreased to decrease the conductivity. The inner diameter may be 40% or more of the average outer diameter.

The multicomponent carbon nanotubes may be obtained by mechanically and physically pressing a powdery material into a pellet shape. The multi-walled carbon nanotubes processed in the form of pellets can prevent scattering of the powder in the operation, thereby improving the working environment.

As used herein, the term "Raman spectroscopy" refers to a method of obtaining the frequency of a molecule in a Raman effect, which is a phenomenon in which scattered light having a frequency corresponding to a frequency of a molecule is generated when monochromatic excitation light such as laser light is irradiated Means that the crystallinity of carbon nanotubes can be quantified and measured by Raman spectroscopy.

The peak present in the wavenumber range 1580 ± 50 cm ^-1 in the Raman spectrum of the carbon nanotubes is referred to as a G band, which is a peak indicating the sp ² bond of carbon nanotubes, and represents a carbon crystal having no structural defect. Further, a peak present in the wavenumber range of 1360 ± 50 cm ^-1 is referred to as a D band, which is a peak indicating the sp ³ bond of carbon nanotubes, indicating carbon having a structural defect.

Further, the peak values of the G band and the D band are referred to as I _G and I _D , respectively, and the crystallinity of the carbon nanotubes can be quantified by measuring the Raman spectral intensity ratio (I _G / I _D ) have. That is, the higher the Raman spectroscopic intensity ratio, the less structural defects of the carbon nanotubes. Therefore, when the carbon nanotubes exhibiting a high Raman spectral intensity ratio are used, better conductivity can be realized.

Specifically, the Raman spectral intensity ratio (I _G / I _D ) of the carbon nanotubes may be 1.0 or more. If the _IG / I _D value of the carbon nanotubes is less than 1.0, amorphous carbon is contained in a large amount and the crystallinity of the carbon nanotubes is poor, so that the effect of improving conductivity at the time of kneading with the thermoplastic resin may be weak.

Since carbon nanotubes have a higher carbon content, they have less impurities such as catalysts and can exhibit excellent conductivity. Therefore, the carbon purity of the carbon nanotubes is 95% or more, preferably 95 to 98%, more preferably, 96.5 to 97.5%.

If the carbon purity of the carbon nanotubes is less than 95%, structural defects of the carbon nanotubes may be induced to deteriorate crystallinity, and the carbon nanotubes may be easily broken or broken by external stimuli.

2 and 3 are scanning electron microscope (SEM) images showing the bundle length and bundle diameter of the multicomponent carbon nanotubes according to an embodiment of the present invention, respectively.

2 and 3, the average diameter of the bundle-type carbon nanotubes formed by aggregating the single-stranded carbon nanotubes in the form of bundles is 1 to 10 μm, preferably 3 to 5 μm, more preferably , And the average bundle length may be 10 to 100 占 퐉, preferably 30 to 60 占 퐉, and more preferably 45 to 55 占 퐉.

The multi-wall carbon nanotubes can be dispersed in a thermoplastic resin to form a three-dimensional network structure, and the conductivity can be improved as the network structure is firmly formed. In particular, the network structure can be firmly formed by controlling the average bundle diameter and average bundle length of the bundle-type carbon nanotubes to a certain range.

At this time, if the average bundle diameter of the bundle-type carbon nanotubes is less than 1 占 퐉 or the average bundle length is more than 100 占 퐉, the dispersibility of the bundle-type carbon nanotubes may deteriorate and the conductivity of the conductive wire may be uneven, Or the average bundle length is less than 10 mu m, the network structure may become unstable and the conductivity may be lowered.

The higher the oxygen content in the bundle-type carbon nanotubes, the lower the conductivity, so that carbon nanotubes having a low oxygen content can be used. Specifically, the oxygen content of the multicomponent carbon nanotubes may be 0.5 wt% or less, preferably 0.1 to 0.5 wt%, based on the total weight of the multicomponent carbon nanotubes.

Meanwhile, the content of the multicomponent carbon nanotubes may be 0.1 to 20% by weight, preferably 0.1 to 10% by weight, more preferably 3 to 5% by weight, based on the total weight of the first region . If the content of the multicomponent carbon nanotubes is less than 0.1% by weight, sufficient conductivity can not be imparted to the conjugated fibers. If the content is more than 20% by weight, the moldability, workability, and elongation properties of the conjugated fiber may be deteriorated.

The conductive composite fiber may further include a second region including a second thermoplastic resin. The second region may support the first region that imparts conductivity to the conductive composite fiber to improve the mechanical properties of the composite fiber.

The ratio of the cross section of the second region to the cross section of the conductive composite fiber may be 0.01 to 0.9, preferably 0.1 to 0.8, more preferably 0.4 to 0.7. If the ratio of the second region is less than 0.01, the first region is not sufficiently supported, and the mechanical properties of the composite fiber may be deteriorated. If the ratio exceeds 0.9, the ratio of the first region of the composite fiber decreases, Can be lowered.

4 and 5 are sectional views of a conductive conjugate fiber according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of a composite fiber in which the first and second regions are in a shell and a core, that is, in an out-of-position position, and FIG. 5 is a cross- Fig.

Referring to FIG. 4, the first and second regions may be a sheath and a core, respectively.

Wherein the first thermoplastic resin is selected from the group consisting of polyamide, polyimide, polyethylene, polypropylene, polyethylene copolymer, polyester, polyacrylonitrile, polystyrene, polycarbonate, aramid, polyethylene terephthalate, polyurethane, styrene- Styrene copolymers, styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, ethylene-propylene-diene copolymers (EPDM), ethylene- Butadiene copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, maleic anhydride grafted polypropylene, maleic anhydride grafted linear low density polyethylene, maleic anhydride graft Low density polyethylene, maleic anhydride grafted silica A styrene-ethylene-butylene-styrene copolymer and a maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, and may preferably be polyurethane, More preferably, it may be a thermoplastic polyurethane, but is not limited thereto.

Thermoplastic polyurethane (TPU) can improve the stretchability and impact strength of the first thermoplastic resin and the composite fiber as a molded product thereof. In addition, since the thermoplastic polyurethane does not inhibit the dispersion of the carbon nanotubes while improving the stretchability of the conjugated fibers, the variation in conductivity of the conjugated fibers can be minimized.

The second thermoplastic resin may be at least one selected from the group consisting of polyamide, polyimide, polyethylene, polypropylene, polyethylene copolymer, polyester, polyacrylonitrile, polystyrene, polycarbonate, aramid, polyethylene terephthalate, polyurethane, styrene- , Styrene-ethylene-butadiene-styrene copolymers, styrene-ethylene-propylene-styrene copolymers, styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, ethylene- Maleic anhydride grafted linear low density polyethylene, maleic acid anhydride grafted polypropylene, maleic anhydride grafted linear low density polyethylene, ethylene-maleic anhydride grafted ethylene-maleic anhydride grafted linear low density polyethylene, ethylene-vinyl acrylate copolymer, Anhydride grafted low density polyethylene, maleic anhydride graft Styrene-ethylene-butylene-styrene copolymer grafted with maleic anhydride and styrene-ethylene-butadiene-styrene copolymer grafted with maleic anhydride, and may preferably be polyamide , But is not limited thereto.

The polyamide can improve the mechanical properties of the composite fiber by compensating for the problem of low tensile strength of the polyurethane.

The first region may further include one conductive filler selected from the group consisting of fullerene, graphene, graphite, carbon fiber, carbon black and a mixture of two or more thereof, preferably carbon black, and the conductive filler The content may be 10-1,000 parts by weight based on 100 parts by weight of the multicomponent carbon nanotubes.

Carbon black is excellent in conductivity and rigidity, but has the property that carbon particles easily dislodge due to scratching or friction. Therefore, if carbon black is used alone or in an excessive amount as a conductive filler, moldability of the thermoplastic resin composition may be deteriorated .

Therefore, when the carbon black is used together with the carbon nanotubes, the content of the carbon black can be lowered, so that the moldability of the thermoplastic resin can be prevented from being lowered, and carbon black can be inserted into the network structure formed in the thermoplastic resin by the carbon nanotubes So that the composite fiber finally produced can have a uniform conductivity.

Hereinafter, embodiments of the present invention will be described in detail.

Example 1

3.5% by weight of carbon nanotubes and the remaining amount of thermoplastic polyurethane were mixed and extruded to produce a chip, which was melted at 265 ° C and spun to produce a conductive composite fiber having a circular cross section.

Example 2

5.0% by weight of carbon nanotubes and the remaining amount of thermoplastic polyurethane were mixed and extruded to produce a chip, which was melted at 265 캜 and spun to produce a conductive composite fiber having a circular cross section.

Example 3

5.0% by weight of carbon nanotubes and the remaining amount of thermoplastic polyurethane were mixed and extruded to prepare chips.

A polyamide chip for forming a core material having a circular cross section and a core is melted at 265 DEG C and spun to obtain a conductive composite fiber having a cross section of a core material having a circular section and a casing formed on the outer surface of the core material each having a ratio of 7: .

Example 4

5.0% by weight of carbon nanotubes and the remaining amount of thermoplastic polyurethane were mixed and extruded to prepare chips.

A polyamide chip for forming a core material having a circular cross section and a core is melted and spun at 265 DEG C to produce a conductive composite fiber having a cross section of a core material having a circular section and a shell formed on the outer surface of the core material, .

Comparative Example 1

Conductive conjugated fiber was prepared in the same manner as in Example 1 except that polyamide was used instead of thermoplastic polyurethane in the production of chips.

Comparative Example 2

3.5% by weight of carbon nanotubes and the remaining amount of polyamide were mixed and extruded to prepare a chip.

A polyamide chip for forming a core material having a circular cross section and a core is melted at 265 DEG C and spun to obtain a conductive composite fiber having a cross section of a core material having a circular section and a casing formed on the outer surface of the core material each having a ratio of 7: .

The composition ratios of the raw materials according to Examples 1 to 4 and Comparative Examples 1 to 2 and the results of the conductivity and elongation properties thereof are shown in Table 1 below.

-CNT: A plurality of multi-walled carbon nanotubes (MWCNT) having an average outer diameter and an average inner diameter of 16.4 nm, 8.0 nm, a Raman spectroscopic intensity ratio of 1.0, and a carbon purity of 95% And a bundle type MWCNT powder having an average bundle length of 30 占 퐉 was processed into a pellet shape (apparent density of pellets: 0.025 g / ml)

-TPU: thermoplastic polyurethane

-PA6: polyamide-6

division Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Comparative Example 2 Section ratio
(Sheath / core) 10/0
(TPU) 10/0
(TPU) 3/7
(TPU / PA6) 5/5
(TPU / PA6) 10/0
(PA6) 3/7
(PA6 / PA6) Conductive filler
(CNT, wt%) 3.5 5.0 5.0 5.0 3.5 3.5 Surface resistance
(ohm / sq.,
@ Fiber cross-section diameter 300 mu m) 10 ^ 8 10 ^ 6 10 ^ 8 10 ^ 7 10 ^ 8 10 ^ 8.5 Surface resistance
(ohm / sq.,
@ Fiber cross-section diameter 500 mu m) 10 ^ 3 10 ^ 2 10 ^ 3 10 ^ 2 10 ^ 3 10 ^ 3 Extensibility ◎ ◎ ○ ◎ X X The tensile strength △ △ ◎ ○ ◎ ◎

(?: Excellent,?: Good,?: Fair, X: poor)

Referring to Table 1, as the content of carbon nanotubes increases in Examples 1 and 2, the conductivity was improved, and the stretchability and tensile strength were maintained. Also, referring to Examples 2, 3 and 4, it can be seen that, compared to Example 2, in which the fibers consist of a core material comprising a composition comprising thermoplastic polyurethane and carbon nanotubes, the polyamide and the composition, The tensile strength of Examples 3 and 4 was remarkably improved.

On the other hand, referring to Example 1 and Comparative Example 1, in the case of Comparative Example 1 in which the fibers were composed of a core material containing a composition containing polyamide and carbon nanotubes, the stretchability was remarkably lowered as compared with Example 1. Particularly, in the case of Comparative Example 2 in which the structure of Comparative Example 1 was changed to apply the polyamide and the composition as a core material and a sheath, respectively, the stretchability was not improved.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

10, 20: Conductive composite fiber
11, 21: first region
12, 22: second region

Claims (13)

A first region including a plurality of carbon nanotubes each having an average outer diameter of 5 to 50 nm and an average inner diameter of 40% or more of the average outer diameter, and a first thermoplastic resin. The method according to claim 1,
Wherein the carbon nanotube has a Raman spectral intensity ratio (IG / ID) of 1.0 or more. The method according to claim 1,
Wherein the carbon purity of the carbon nanotube is 95% or more. The method according to claim 1,
Wherein the bundle diameter of the bundle-type carbon nanotubes is 1 to 10 占 퐉. 5. The method of claim 4,
Wherein the bundle diameter of the bundle-type carbon nanotubes is 10 to 100 占 퐉. The method according to claim 1,
Wherein the conductive composite fiber further comprises a second region comprising a second thermoplastic resin. The method according to claim 6,
Wherein the ratio of the cross section of the second region to the cross section of the conductive composite fiber is 0.01 to 0.9. 8. The method of claim 7,
Wherein the first and second regions are a sheath and a core, respectively. The method according to claim 1,
Wherein the first thermoplastic resin is selected from the group consisting of polyamide, polyimide, polyethylene, polypropylene, polyethylene copolymer, polyester, polyacrylonitrile, polystyrene, polycarbonate, aramid, polyethylene terephthalate, polyurethane, styrene- Styrene copolymers, styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, ethylene-propylene-diene copolymers (EPDM), ethylene- Butadiene copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, maleic anhydride grafted polypropylene, maleic anhydride grafted linear low density polyethylene, maleic anhydride graft Low density polyethylene, maleic anhydride grafted silica At least one component selected from the group consisting of a styrene-ethylene-butylene-styrene copolymer, a maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, polybutylene terephthalate, polytrimethylene terephthalate, and polylactic acid ≪ / RTI > The method according to claim 6,
Wherein the second thermoplastic resin is selected from the group consisting of polyamide, polyimide, polyethylene, polypropylene, polyethylene copolymer, polyester, polyacrylonitrile, polystyrene, polycarbonate, aramid, polyethylene terephthalate, polyurethane, styrene- Styrene copolymers, styrene-butadiene-styrene copolymers, styrene-isoprene-styrene copolymers, ethylene-propylene-diene copolymers (EPDM), ethylene- Butadiene copolymer, ethylene-methyl acrylate copolymer, ethylene-ethyl acrylate copolymer, ethylene-butyl acrylate copolymer, maleic anhydride grafted polypropylene, maleic anhydride grafted linear low density polyethylene, maleic anhydride graft Low density polyethylene, maleic anhydride grafted silica At least one component selected from the group consisting of a styrene-ethylene-butylene-styrene copolymer, a maleic anhydride grafted styrene-ethylene-butadiene-styrene copolymer, polybutylene terephthalate, polytrimethylene terephthalate, and polylactic acid ≪ / RTI > The method according to claim 6,
Wherein the first thermoplastic resin is polyurethane,
And the second thermoplastic resin is a polyamide. The method according to claim 1,
Wherein the first region further comprises one conductive filler selected from the group consisting of fullerene, graphene, graphite, carbon fiber, carbon black, and a mixture of two or more thereof. 13. The method of claim 12,
And 10 to 1,000 parts by weight of the conductive filler relative to 100 parts by weight of the multicomponent carbon nanotubes.

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