KR20110121670A

KR20110121670A - Carbon nano tube heating element

Info

Publication number: KR20110121670A
Application number: KR1020110107808A
Authority: KR
Inventors: 박상구
Original assignee: 박상구
Priority date: 2011-10-21
Filing date: 2011-10-21
Publication date: 2011-11-08

Abstract

In the present invention, in the carbon nanotube heating element, the warp yarns 1 are opened in the upper and lower groups by the opening motion of the weaving yarn heald, and the weft yarns 2 are enclosed in the open warp yarns by the drum motion. Weaved weft yarns are pushed to the front of the woven fabric to form the fabric by successive repetition of body needle movement to complete the organization of the warp and weft, the warp of the fabric is formed of the blade structure, the weft yarn is the central yarn (21) ) Covering the coating yarn 22 on both sides of the fabric, and alternately arranged several strands of warp yarns with electrical conductor wires 3 on both sides of the fabric, and the center yarn of the covered weft yarn is aramid fiber, fluorine fiber, It is any one or more than one of flon fiber, ultra high tensile PVA, nylon, polyester fiber, glass fiber, the covering yarn of the covered weft is a fiber coated with carbon nanotubes, The fabric is coated with an electrically insulating material.

Description

Carbon nano tube heating element

The present invention relates to a carbon nanotube heating element fabricated with a weave tissue fabric having a weft covered with carbon nanotube coated fibers to ensure the safety and durability of the planar heating element.

The planar heating element refers to a thin sheet-like heating element that generates heat when power is applied.

Planar heating elements can be classified according to the material of the electrical resistance wire.

First, as a metal resistance wire, an alloy wire having a volume resistivity in the range of 10 × 10 ⁻⁶ Pa · cm to 200 × 10 ⁻⁶ Pa · cm and flattened in an “S” shape to apply power to both ends on one straight line. It is a structural way. However, since the load current flows only in one straight line, when chemical change or physical stress deformation occurs on the line surface, the distribution voltage is localized due to the increase in resistance, and thus there is a risk of overheating and fire.

Thus, in order to improve the problem of the tandem structure system, the volume resistivity of the electrical resistance wire is fabricated or filmed with carbon fiber or an electrically conductive composite material and the like in the range of 10 ^-4 Pa.cm to 10 ² Pa.cm, and the fabric Or it is a heating element which is a parallel structure system which forms an electrode wire in both ends of a film. That is, a fabric heating element, film or the like that is woven by coating a composite material composed of conductive particles such as carbon black, carbon nanotubes, metal powder, etc. and a binder resin such as epoxy resin, urethane resin, polyester resin, silicone resin or the like. It consists of a film heating element adhering on the fabric.

However, the carbon fiber is very weak against external forces such as abrasion, bending, distortion, and the like, and is prone to breakage when subjected to a force perpendicular to the fiber axis. The composite material has acid, alkali, moisture, Oil, a plasticizer, or the like penetrated or there was a problem in durability due to changes in the electrical resistivity over time due to thermal curing.

In addition, there is a problem in that overheating and arcing occur because contact resistance is generated by thermal history or impact at an intersection point of a carbon fiber or an electrically conductive composite material and an electrode wire to which a power is applied.

The present invention is to solve the problem of overheating due to the concentrated heat of the surface heating element, the arc generation due to the electrical contact resistance, the change over time of the electrical resistance.

In order to achieve the above object, the present invention, in the carbon nanotube heating element, by opening the warp yarn 1 to the upper and lower groups by the opening motion of the weaving machine heald, and the weft (2) by the north needle movement through the opening warp The fabric is formed by weaving and weaving the weft in which the body is enclosed in the opening to the front of the woven fabric to complete the warp and weft tissue to form a fabric, the warp of the fabric being formed into the blade tissue , Weft covering the covering yarn 22 on the center yarn 21, and arranged the warp of several strands on both sides of the fabric with electrical conductor wires 3, the center yarn of the covered weft is a general fiber Aramid fiber, fluorine fiber, flon fiber, ultra high tensile PVA, nylon, polyester fiber, glass fiber, any one or any one or more of the yarn, the covering yarn of the covered weft It is a fiber coated with carbon nanotubes, characterized in that the fabric is coated with an electrically insulating material.

The electrical parallel structure of the load according to the high electrical resistivity of the electric heating element prevents overheating due to the dispersion effect of the load current and prevents changes over time by the carbon nanotube coated fiber, and the covered carbon nanotube coated The blade structure of fibers and fabrics solves the electrical contact resistance problem.

1 is a fabric state of the carbon nanotube heating element according to the present invention.
2 is a perspective view of a covered weft of carbon nanotube heating elements according to the present invention;
Figure 3 is a weft supply state diagram of the carbon nanotube heating element according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are a perspective view of the woven state of the carbon nanotube heating element and the covered weft of the carbon nanotube heating element according to the present invention. In the carbon nanotube heating element, the warp yarn 1 is opened by the opening motion of the weaving machine. Opening the upper and lower groups, entering the weft (2) by the north needle movement through the opening warp, the body needle movement of pushing the weft in the opening to the woven fabric to complete the tissue of the warp and weft Weaving is carried out in a continuous repetition to form a fabric, the warp of the fabric is formed into a blade structure, the weft yarn covering the coating yarn 22 on the center yarn 21, and a plurality of strands of warp on both sides of the fabric Alternately arranged with electrical conductor wires (3), the core yarns of the covered weft yarns are composed of aramid fibers, fluorine fibers, flon fibers, ultra high tensile PVA, nylon, polyester fibers and glass fibers Which will have more than one or one, and the coating of the covering weft yarn with a carbon nanotube-coated fibers, and the fabric characterized in that the coating treatment of an electrically insulating material.

Textile fabrics are formed by supporting the threads from each other by weaving or knitting from the threads. Weaving and knitting methods in which the thread is guided up and down the adjacent yarns are different.

Weaving is a fabric in which warp and weft cross each other up and down to form a flat body of any width. It is woven into looms and is made into various fabrics depending on how the warp and weft intersect.

The main motion of the weaving process is the shedding motion, which is the process of separating the warp into two layers according to the fabric and forming a tunnel called shed, and weaving the weft through the warp according to the width of the fabric. It consists of a picking motion to pass through and a beating motion to push the weft through the opening to the front of the woven fabric as a body to complete the warp and weft tissue. In order to continue the weaving, the warp is released from the warp beam, and a certain amount of fabric is removed from the weaving area by the required speed and proper tension to the weaving part (let-off) and the required weft spacing, and the fabric is wound on the roller. Take-up is necessary.

The warp of the fabric is preferably formed of a blade structure, weft is characterized in that the weft yarn covering the coating yarn 22 on the center yarn (21).

Figure 3 is a weft supply state diagram of the carbon nanotube heating element according to the present invention, in the North needle movement, the carbon nanotube coated weft has a problem that the weft is broken because the elastic modulus and friction coefficient is large. So weft is characterized in that the weft is supplied through the supply device (20).

The weft supply device is composed of a fixed lever 7 and a rotary lever 9, and installs a plurality of guide rollers 8 on the fixed lever and the rotary lever respectively, and rotates the lever to maintain a constant tension on the weft. It is characterized in that the spring 10 is mounted on the top.

The fixed lever is fixed at both ends, and the rotary lever is characterized in that rotates about the support point 11 at one end.

The function of the rotary lever is to maintain a constant weft tension during repeated weft feeding through the bobbin.

Arrangement of the fixed lever and the rotary lever is characterized in that the support point of the rotary lever and the fixed point of the fixed lever coincides.

The weft accumulation length of the weft supply device mounted on the fixed lever and the rotary lever by a plurality of guide rollers, respectively, is preferably adjusted to the number of guide rollers and the length of the lever, and preferably three times or more the length of the fabric width.

In the range of the accumulation length of the weft, it serves to cushion the weft fluctuation tension during the motion of inserting the weft into the fabric width direction into the opening made by the opening motion.

It is characterized in that the warp of several strands on both sides of the fabric is arranged to be replaced by an electrical conductor line (3).

The electrical conductor wire serves as an electrode wire for applying power to the weft yarn which is a fiber coated with carbon nanotubes.

The material of the electrical conductor wire is preferably a copper wire, an aluminum wire, a stainless steel wire, or the like.

The electrical conductor wire is preferably formed of the blade structure of the fabric.

As for the textile structure of this invention, a blade structure (lenojig) is preferable. The wing tissues are not parallel to each other, and two warp threads are twisted together to form an 8-shaped weft. Thus, a mesh-like crop is formed.

In particular, the fibers coated with carbon nanotubes are in contact with each other in the openings in which the conductor wires are twisted with each other, and the contact and compressive strengths are maintained between the conductor wires and the fibers coated with carbon nanotubes.

The center yarn of the covered weft is a general fiber yarn, although the material is not limited. Especially, superfibers such as aramid fiber, fluorine fiber, flon fiber, ultra high tensile PVA or glass fiber, nylon, polyester fiber and the like are preferable. In particular, the glass fiber is preferably a yarn in which the yarn is twisted in several strands. This is because the twist resistance is good when the thread is twisted.

The covering yarn of the covered weft is characterized in that the fiber coated with carbon nanotubes.

The spiral winding of the carbon nanotube-coated fibers in a central thread adjusts the electrical resistance by controlling the number of windings of electrical resistance wires between the electric conductor lines arranged at both ends of the fabric, and the carbon nanotube-coated fibers and the electric The purpose is to reduce the electrical contact resistance by increasing the contact area by crossing the conductor wires in a spiral rather than orthogonal.

In addition, the carbon nanotube-coated fibers are spirally covered on the central yarn, whereby flex resistance can be improved and mechanical shock can be tolerated. In particular, carbon nanotube coated fibers can provide a safe electric heating element.

In addition, the carbon nanotube-coated fiber and the electrical conductor wire and the contact resistance intersecting in the form of a spiral lowering, for the electrical insulation, characterized in that the fabric has a fabric structure insulated coating with the following resin.

The resin type is preferably epoxy, polyurethane, silicone, fluorine, EPDM, polyester, bituminous, oleoresin, phenol, alkyd, PVC resin and the like. In particular, silicone rubber, EPDM rubber or fluorine rubber is preferable.

The silicone rubber, the EPDM rubber and the fluorine rubber are nonpolar polymers, and have good electrical insulation properties, and the carbon nanotube coated fibers are made of a polar resin having good adhesion to the binder of the conductive layer. The weak point is that nonpolar polymer can exert chemical resistance.

In addition, since the binder is made of a polar resin having good adhesion, it is possible to prevent the change of the heating element resistance value over time even in the surrounding environment such as hydrocarbon oil. Therefore, the carbon nanotube heating element is composed of the polar resin of the conductive layer and the nonpolar resin of the electrical insulation coating layer, so that the chemical resistance and oil resistance of the electrical heating element can be solved at the same time, thereby improving durability.

Therefore, the carbon nanotube heating element according to the present invention can provide a safe heating element by a solid electrical connection between the electrical conductor wire and the carbon nanotube coated fiber.

Alternatively, the carbon nanotube-coated fibers are impregnated with an electrically conductive composite material to be integrated.

The electrically conductive composite material is a composite material composed of a conductive resin and a binder resin such as carbon black, carbon nanotubes, graphite, and metal powder.

As the above-mentioned binder resin, silicone rubber, fluorine rubber, urethane rubber, EPDM rubber and the like are preferable.

In particular, silicone rubber is most preferred.

This is because silicone rubber is excellent in heat resistance and excellent in resilience even in a thermal environment. This is because the far-infrared emissivity of silicone rubber is high.

That is, by integrating the electrically conductive composite material on the carbon nanotube-coated fibers, it is possible to prevent the shape stability and thermal deformation of the carbon nanotube-coated fibers.

When integrated with a resilient bonding resin such as silicone rubber as described above, it is possible to maintain electrical contact by securing contact and compressive strength between the electric conductor wire and the fiber coated with carbon nanotubes, which can withstand mechanical shock and thermal shock. It works.

The carbon nanotube coated fiber according to the present invention imparts electrical conductivity to the fiber itself, and the conductive layer coated with carbon nanotubes is characterized by being composed of carbon nanotubes and a binder resin.

The carbon nanotube-coated fibers are characterized by coating the carbon nanotubes on the substrate fiber surface.

Although the said base fiber is not limited, Especially polyvinyl alcohol fiber, polyamide fiber, poly aramid fiber, polyester fiber, acrylic fiber, etc. are preferable. In particular, polyester fibers are more preferred in terms of good thermal and dimensional stability.

Carbon nanotubes have a very large specific surface area, a ratio of length to diameter, excellent elastic strength, excellent electrical properties and excellent heat transfer characteristics, and thus can secure a safe conductive path as an electric heating element.

Carbon nanotubes have a graphite sheet circularly rolled to a nano-sized diameter, and exhibit the characteristics of electrically metallic and semiconducting materials according to the angle and shape of the graphite sheet. Nanotubes, double-walled carbon nanotubes, and multi-walled carbon nanotubes. The structure of the carbon nanotubes is divided into armchair, zigzag and chiral forms according to the angle of rolling up the graphite plate. Multi-walled carbon nanotubes have electrical conductivity similar to copper. In addition, the hexagonal structure has a cylindrical tube shape, which has about 100 times stronger strength and flexibility than steel.

Carbon nanotubes according to the present invention is not limited, but considering the electrical properties, the armchair structure and multi-walled carbon nanotubes exhibiting metallicity are preferred.

Accordingly, the present invention enables the formation of a conductive layer in the form of a three-dimensional network on the substrate fiber surface with the high electrical conductivity and aspect ratio of the carbon nanotubes.

The average diameter of the carbon nanotubes can be selected, for example, from 0.5 to 1 micrometer, in particular from 1 to 100 nanometers, and the average length is from 1 to 1000 micrometers, in particular from 5 to 300 micrometers. You can choose from.

Surfactant contained in the dispersion liquid used for the manufacturing process of a conductive layer on the surface of a base fiber can use any of amphoteric surfactant, anionic surfactant, cationic surfactant, and nonionic surfactant.

Amphoteric surfactants include sulfobetaine, phosphobetaine, carboxybetaine, imidazolium betaine and alkylamine oxide.

The proportion of the surfactant is, for example, 0.01 to 100 parts by weight, in particular about 0.05 to 30 parts by weight based on 100 parts by weight of the carbon nanotubes.

It is contained in the said surfactant, and also a hydrate (hydration stabilizer) is contained in a conductive layer. The hydration stabilizer is a dispersion used in the process of producing the conductive layer fibers, in which the surfactant promotes dissolution in a liquid medium (water, etc.) such as water to sufficiently exert its surfactant action, and as a conductive layer, carbon It contributes to maintaining the dispersion state until the nanotubes are fixed to the substrate fiber surface.

The kind of hydration stabilizer is obtained by the kind of surfactant, the kind of liquid medium (dispersion medium), etc., but when water is used as a liquid medium, for example, when a nonionic surfactant is used, a hydrophilic compound (water-soluble compound), etc. Can be used.

The conductive layer contains the above-mentioned surfactant and also contains a binder, and the binder improves the adhesion between the carbon nanotubes and the substrate fiber.

As a binder which coats the said carbon nanotube on a base fiber, it is a general adhesive resin. Examples thereof include acrylic resins, vinyl acetate resins, polyester resins, polyamide resins, and polyurethane resins. These adhesive resins can be used in combination of any one or two or more kinds.

In the binder, when water is used as the dispersion medium, hydrophilic adhesive resins such as aqueous polyester resins, aqueous acrylic resins, vinyl acetate resins, and urethane resins are preferable.

The aqueous polyester resin is obtained by the reaction of a dicarboxylic acid component (such as an aromatic dicarboxylic acid such as terephthalic acid or an aliphatic dicarboxylic acid such as adipic acid) and a diol component (such as ethylene glycol and alkanediol such as 1,4-butanediol). In the polyester resin which can be used, the polyester resin into which the hydrophilic group was introduce | transduced can be used. As a method of introducing a hydrophilic group, for example, a dicarboxylic acid component having a hydrophilic group such as a sulfonate group or a carboxylate group as a dicarboxylic acid component (such as 5-sodium sulfoisophthalate or a trifunctional or higher polyhydric carboxylic acid) is used. , poly (ethylene glycol), dihydroxy-carboxylic acid as the diol component, and the like can be exemplified.

Examples of the aqueous acrylic resin include poly (meth) acrylic acid or salts thereof, (meth) acrylic acid- (meth) acrylic acid ester copolymer, (meth) acrylic acid-styrene- (meth) acrylic acid ester copolymer, and (meth) acrylic acid- A vinyl acetate copolymer, a (meth) acrylic-vinyl alcohol copolymer, a (meth) acrylic acid-ethylene copolymer, these salts, etc. can be illustrated.

The vinyl acetate-based resin is a polymer containing vinyl acetate units or saponification thereof, and examples thereof include polyvinyl acetate, (meth) acrylic acid-vinyl acetate copolymer, vinyl acetate-maleic anhydride copolymer, and vinyl acetate Methyl (meth) acrylate copolymer, ethylene-vinyl acetate copolymer, polyvinyl alcohol, ethylene-vinyl alcohol copolymer, etc. may be sufficient.

Moreover, it is preferable that the said binder uses the same kind of adhesive resin as a base fiber. For example, when polyester fiber is used as a base fiber, it is preferable to use polyester-type resin as a binder.

The proportion of the binder allows the carbon nanotubes to adhere smoothly to the substrate fiber surface without completely covering the surface of the carbon nanotubes, for example, from 50 to 400 parts by weight, preferably 100 parts by weight of the carbon nanotubes. Preferably it is about 80 to 300 parts by weight.

In order to coat the carbon nanotubes on the surface of the base fiber, a surfactant, in particular an amphoteric surfactant, is used as the aqueous dispersion containing the carbon nanotubes.

As a dispersion medium for dispersing carbon nanotubes, for example, general-purpose polar solvents (water, alcohols, amides, cyclic ethers, ketones, etc.), general-purpose hydrophobic solvents (aliphatic or aromatic hydrocarbons, aliphatic ketones, etc.), Or a mixed solvent of the above can be used. Water is preferable at the point of simplicity and operability in said solvent.

Moreover, it is preferable that the dispersion liquid of the carbon nanotubes used for a process contains the said surfactant in order to disperse | distribute a carbon nanotube stably in the liquid medium, such as water, without aggregation. The amount of the surfactant used may be selected, for example, in the range of 1 to 100 parts by weight, in particular about 5 to 50 parts by weight, based on 100 parts by weight of the carbon nanotubes.

As a dispersion of carbon nanotubes using surfactants, especially amphoteric surfactants, hydrates (hydration stabilizers) are added to the dispersions in order to facilitate dissolution of the surfactants in the liquid medium (water, etc.) and to sufficiently exhibit the surfactant action. It is preferable to add.

The amount of the hydration stabilizer to be used may be selected in the range of 10 to 500 parts by weight, particularly about 50 to 300 parts by weight, based on 100 parts by weight of the surfactant.

The production of such a dispersion is not particularly limited, and either method can be used to produce a dispersion in which the carbon nanotubes are stably dispersed in a uniform dispersion state in a liquid medium such as water without agglomeration or agglomeration between the carbon nanotubes. It can also be prepared by the method.

The method of treating the carbon nanotube-coated fibers by the dispersion of the carbon nanotubes is not particularly limited. For example, a method of immersing the base fibers in the dispersion of the carbon nanotubes, a sizing apparatus using a touch roller, a doctor, The method of processing with the dispersion liquid of a carbon nanotube using a coating apparatus, such as a pad, a spray apparatus, and a seal printer, etc. are mentioned.

The temperature in the treatment using the dispersion is not particularly limited, and can be selected, for example, in the range of about 0 to 150 ° C, and can usually be treated at room temperature.

In the coating treatment using the dispersion liquid, the same operation or the same operation may be repeated a plurality of times.

In the drying step, the liquid medium is removed from the substrate fiber treated with the dispersion of carbon nanotubes and dried, and the carbon nanotubes are uniformly attached to the surface of the substrate fiber as a conductive layer in a uniform thin layer state.

The drying temperature can be selected according to the type of liquid medium in the dispersion, and when water is used as the dispersion medium, the drying temperature of about 100 to 230 ° C is generally adopted, although consideration should be given to the material of the base fiber. In the case of a polyester fiber, about 150-200 degreeC is preferable.

The carbon nanotube coated fiber according to the present invention is characterized in that the volume resistivity of the coated conductive layer is 10 ⁻² to 10 ³ Pa · cm.

The volume resistivity is a value measured in units of blocks dried by dispersing a dispersion of carbon nanotubes in a volume of 1 cubic centimeter.

When the volume resistivity is exceeded, the capacitance increases, and output stabilization as an electric heating element cannot be expected.

If the volume resistivity is lower than the above, it is impossible to have an electrical parallel structure that produces a dispersion effect of the load current of the electric heating element at a commercial voltage.

As a parallel structure of the load according to the electrical resistivity higher than the metal resistance wire of the planar heating element carbon nanotube heating element according to the present invention as a structure bound by the carbon nanotube-coated fiber that withstands the dispersion effect of load current and repeated bending, It is possible to provide a safe and durable heating element.

(1) 2.0 g of 3- (dimethylstearylammonio) propanesulfonate (amphoteric surfactant), 5 ml of glycerol (hydration stabilizer) and 495 ml of deionized water were mixed and an aqueous solution of the surfactant (pH 6.5) was prepared.

(2) 500 ml of the aqueous solution of the surfactant obtained in the above (1) and 15.2 g of carbon nanotubes (MWCNT-7 manufactured by Nano Carbon Technologies) were stirred with a ball mill.

(3) 500 ml of an aqueous solution of the surfactant prepared in the same manner as in (1) was added to the carbon nanotube-containing liquid material in which (2) was produced, and a dispersion was prepared using a bead mill.

(4) Impregnating the dispersion liquid of (3) on polyester fiber (250 denier) as a base fiber and drying at 150 ° C. for 5 minutes to prepare a fiber coated with carbon nanotubes.

(5) The electrical resistance of the coated fiber of (4) is repeated several times to match 2500 to 3000 ohms per centimeter.

(6) Covering in a spiral shape on the polyester fiber (fineness 5000 denier) which is the center yarn with the fiber of said (5) (about 1.5 mm-2 mm pitch).

(7) Through the weft supply apparatus according to the present invention, the weft yarn is a covering yarn prepared in the above (6), the blade seal is woven into two strands of polyester 500 denier (fineness), the blade seals on both sides Alternately arranged 10 strands of 0.32mm diameter copper wire, weaving width 30cm, weaving density 3 spaces per inch.

(8) Covering the woven fabric in (7) with silicone rubber (the thickness of the coating layer is about 0.5 mm).

The power consumption of the carbon nanotube heating element manufactured by the process (1) to (8) was about 70 Watts per meter (rated voltage 220V). It rises to 50 ℃ when 220V power is applied (ambient temperature 20 ℃)

Although described in detail with respect to preferred embodiments of the present invention as described above, those of ordinary skill in the art, without departing from the spirit and scope of the invention as defined in the appended claims Various modifications may be made to the invention. Therefore, changes in the future embodiments of the present invention will not depart from the technology of the present invention.

1: warp
2: weft
3: electrical conductor wire
7: fixed lever
8: guide roller
9: rotary lever
10: spring
11: support point
12: bobbin
21: center thread
22: coating thread

Claims

In the carbon nanotube heating element, the warp yarn 1 is opened in an up-and-down group by the opening motion of the weaving yarn heald, the weft yarn 2 is enclosed in the open warp by the north needle motion, and the body is enclosed in the opening. Is woven in a continuous repetition of the body needle movement to complete the tissue of the warp and weft by pushing the woven fabric in front of the woven fabric, the warp of the fabric is formed of the blade structure, the weft yarn on the center thread 21 The covering yarn 22 is covered, and a plurality of strands of warp yarns are arranged on both sides of the fabric with electrical conductor wires 3, and the center yarn of the covered weft yarn is aramid fiber, fluorine fiber, flon fiber, The ultra high tensile PVA, nylon, polyester fiber, glass fiber, any one or more than one, the covering yarn of the covered weft is a carbon nanotube coated fiber, the fabric Carbon nanotube heating element, characterized in that the coating treatment with an electrically insulating material.

The carbon nanotube heating element according to claim 1, wherein the carbon nanotube coated fiber has a volume resistivity of 10 ^-2 Pa · cm to 10 ³ Pa · cm of the coated conductive layer.

2. The weft inlet of the north needle movement is supplied through a weft feeder (20), and the weft feeder is composed of a fixed lever (7) and a rotary lever (9). Carbon nanotube heating element, characterized in that the weft covered by a plurality of guide rollers (8) smoothly supplied to each other to form a fabric.

The binder of the conductive layer coated with carbon nanotubes among the carbon nanotube-coated fibers is any one of an acrylic resin, a vinyl acetate resin, a polyester resin, a polyamide resin, and a polyurethane resin. Carbon nanotube heating element, characterized in that one or more than one and the above electrical insulation material is any one or more than one of silicone rubber, EPDM rubber, fluorine rubber.