KR20020071561A - Electrically conductive resin composition used in compression coating and method for manufacturing electrically conductive sheet using the same - Google Patents

Abstract

PURPOSE: A conductive resin composition for extrusion coating and a method for preparing a conductive sheet using the resin composition are provided, which has good conductivity and adhesive property to tarpaulin and can be produced as a tarpaulin-laminated conductive sheet by only one extrusion molding. CONSTITUTION: The conductive resin composition comprises 100 parts by weight of a polyolefin resin as a base resin; 0.2-2.0 parts by weight of silane; 0.01-0.05 parts by weight of a cross-linking agent; 30-40 parts by weight of a conductive carbon black; 0.05-0.2 parts by weight of an antioxidizing agent; 0.2-0.5 parts by weight of a coupling agent; and 0.02-0.1 parts by weight of a processing aid. The polyolefin resin is at least one selected from the groups consisting of very low density polyethylene with a melt index of 5-20 g/10 min and a density of 0.910-0.950 g/cm¬3 prepared from ethylene and α-olefin of C3 or more, low density polyethylene, middle density polyethylene, linear low density polyethylene, ethylene vinyl acetate, ethylene ethyl acrylate and ethylene methyl acrylate.

Description

A conductive resin composition for extrusion coating and a conductive sheet manufacturing method using the conductive resin composition {ELECTRICALLY CONDUCTIVE RESIN COMPOSITION USED IN COMPRESSION COATING AND METHOD FOR MANUFACTURING ELECTRICALLY CONDUCTIVE SHEET USING THE SAME}

The present invention relates to a conductive resin composition capable of tee die extrusion coating and a conductive sheet production method using the conductive resin composition. In particular, the present invention relates to compositions comprising polyethylene and polyolefin copolymers, antioxidants, conductive fillers and inorganics. In addition, the present invention relates to a method for producing a tarpaulin sheet having conductivity by manufacturing a multilayer or multilayer space sheet by the extrusion lamination method using a tee die with the composition.

Generally used tarpaulin is a packaging material used to protect the packaging material or the inner protective material, various kinds of packaging materials such as paper and plastic foam. In particular, the tarpaulin used at this time is prepared by weaving with polyethylene or polypropylene.

Thus prepared tarpaulin is laminated with polyethylene or polypropylene on one side in order to maintain strength, structure, moisture safety, tearability, etc., and protect the inherent properties of tarpaulin, the structure is changed as necessary.

Tarpaulin having such a structure is widely used as a packaging material because of excellent chemical resistance, chemical resistance, mechanical properties, and the like. However, since it is an insulator and an insulator in the range of 10 ¹⁴ to 10 ¹⁶ Ω.cm, it protects the magnetic contents or increases the contact resistance when manufacturing an extruded laminate such as a conductive conductor or crystalline resin. do. When the contact resistance is increased in this way, the contents of a certain temperature can not be designed to maintain a constant temperature and to maintain the initial temperature even when transported for a long time.

On the other hand, in order to weaken contact resistance, an electrically conductive paint or an electrically conductive resin composition can be extruded and laminated on an outer coating layer, and can be used.

However, when the conductive paint or the conductive resin composition is used to impart conductivity to the outer coating layer, since a drying process is required after the first coating during processing, there is a disadvantage in that the actual processing cost is increased and the performance of the finished product is lowered.

In order to maintain perfect conductivity, it is important that both the tarpaulin used and the layer laminated to the tarpaulin have conductivity.

Such materials that can be used in the conductive layer are an important part of the multilayer stack, and should be able to have a certain thickness or more so that they can adhere to the substrate during extrusion lamination. In addition, it should be possible to maintain a good mechanical strength and a certain form, the temperature stability above a certain temperature is very important.

In addition, the conductive resin composition used for lamination based on tarpaulin or the like should have a predetermined level or higher conductivity. Such resins are capable of extrusion lamination through a tee die, have adequate flowability at a constant temperature, and have good adhesion with tarpaulin.

Thus, when extrusion-laminating a conductive resin composition on tarpaulin using a tee die, it is very difficult to maintain electroconductivity while maintaining the outstanding electrically conductive property and the outstanding adhesiveness with tarpaulin.

To date, conductive plastic castings that have been used with conductive fillers or doped with protonic acid in order to obtain resin compositions having conductivity as conductive resin compositions have been disclosed in Korean Patent Nos. 10-0238809 and 10-0216450. Known.

The polyolefin resin capable of the die-die extrusion lamination is a general-purpose resin that is variously used for containers, film extrusion, injection, etc. because of excellent chemical resistance, chemical resistance, and mechanical properties. However, as is well known, polyolefin resins are themselves insulators having a volume resistance in the range of 10 ¹⁴ to 10 ¹⁶ Ω · cm.

A method of imparting conductivity to a resin by adding carbon black to the properties of such insulators to lower the surface resistance of the resin is known (see Korean Patent No. 10-0216450).

Carbon black is widely used as a rubber filler and a plastic black pigment. The carbon black may be broadly divided into acetylene black and furnace black according to the method of preparing carbon black. This kind of carbon black has a great change in conductivity and cleanness depending on the particle size structure and chemical properties of the surface, and retains conductivity due to the characteristics of the crystal structure. In general, carbon black is known to have a volume resistivity in the range of 10 ⁻² to 10 ⁰ Ω · cm.

In order to add such conductive carbon black to the polyolefin resin which is an insulator and the polyolefin resin retains conductivity of 10 ¹ to 10 ³ Ω · cm, 20 to 60% by weight of carbon black is added to the resin based on the conductive carbon black. shall. However, the particle diameter of carbon black is about 50 nm, so it is very difficult to disperse it completely in the resin.

In addition, when the content of carbon black in the composition is increased, the viscosity increases greatly during processing, making it difficult to process, or it is difficult to mold by increasing the processing load in the extrusion injection process after processing. In particular, when processing through the die die extruder, it is difficult to perform molding, such as a case in which extrusion is prevented by blocking a lip of the die, or a phenomenon in which resin does not flow at both ends of the die.

In Korea, when carbon black is added to polyolefin resins, the carbon black content is adjusted in small amounts through two or three times using processing aids such as dispersing agents, internal lubricant processing aids and antioxidants. It also makes products by adjusting the black dispersion.

In order to solve this problem, a sheet having a conductivity and a substrate, for example, tarpaulin, etc. may be separately prepared, and a conductive tarpaulin sheet may be manufactured using an adhesive layer in the middle.

In this case, there is a need for an adhesive that can tightly adhere between the conductive sheet and tarpaulin. In addition, when the size of the tarpaulin and the conductive sheet is different, two processing is required, so there is a disadvantage in that the processing cost is high.

In order to compensate for this disadvantage, conductive paints may be applied, but the price of conductive paints is high. In addition, it is difficult to control the coating amount at the time of coating and there is a drawback that the processable part is very limited.

Accordingly, it is an object of the present invention to provide a conductive polyolefin resin composition which possesses good conductivity and has very good adhesion upon lamination with the substrate used, in particular tarpaulin, and which can be produced in a single extrusion process.

Another object of the present invention is to provide a conductive polyolefin resin composition which can significantly reduce the equipment cost and operation cost, and can be processed by easily adjusting the degree of conductivity desired by the user.

Still another object of the present invention is to provide a method for producing a tarpaulin laminated conductive sheet having excellent conductivity, which is excellent in stability at a constant temperature and can be used in a product requiring a constant temperature.

In order to achieve the above and other objects of the present invention, according to the first aspect of the present invention, 0.2 to 2.0 parts by weight of silane, 0.01 to 0.05 parts by weight of crosslinking agent, and conductive carbon black 30 based on 100 parts by weight of polyolefin resin as a base resin A conductive resin composition for tee die extrusion coating comprising 40 parts by weight, 0.05 to 0.2 parts by weight of antioxidant, 0.2 to 0.5 parts by weight of cupping agent, and 0.02 to 0.1 parts by weight of processing aid is provided.

The polyolefin resin which is a base resin is the ultra low density polyethylene, the low density polyethylene, the medium density polyethylene, the linear low density poly of 5-20 g / 10min of melt index superposed | polymerized by ethylene and the alpha olefin of 3 or more carbon atoms, the density of 0.910-0.950 Ethylene, ethylene vinyl acetate, ethylene ethyl acrylate, and ethylene methyl acrylate alone or in combination of two or more components.

The conductive resin composition comprises at least one of poly dimethyl saloxane and polyethylene glycol, and when the poly dimethyl siloxane is added alone, the content of the poly to methyl siloxane is 0.1 to 0.4% by weight based on 100 parts by weight of the base resin. Part, in the case where polydimethyl siloxane and polyethylene glycol are added, the polydimethyl siloxane is 0.1 to 0.4 part by weight and the polyethylene glycol is 0.05 to 0.2 part by weight based on 100 parts by weight of the base resin.

The silane is selected from the group consisting of vinyl trimethoxy silane, vinyl triethoxy silane, vinyl difluoro silane, vinyl dibromo silane, divinyl dichloro silane, and vinyl trinormal butoxy silane.

The crosslinking agent is t-butyl cumyl peroxide, dicumyl peroxide, methyl ethyl ketone peroxide, 2,5-dimethyl-2,5-di (t-butyl peroxy hexane, di-t-butyl peroxide-t-butyl Peroxide, t-butyl peroxy benzoate, and α, α-bis (t-butyl peroxy isopropyl) benzene.

Carbon black has a particle diameter of 40 to 60 mm, a surface area of 40 to 60 m 2 / g, an apparent density of 0.2 to 0.3 g / cm 2, a pH of 9.5 or less, and an impurity (ash residue) of 500 ppm or less.

2,2-thio diethyl bis- [3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate] as an antioxidant, pentaerytrityl-tetrakis- [3- ( 3,5-di-t-butyl-4-hydroxyphenyl) -propionate-], octadecyl 3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate triethylene Glycol-bis-3 (3-t-butyl-4-hydroxy-5methylphenyl) propionate, and dilauryl thiodipropionate.

The cuffing agent is a bis (dioctyl) phosphite hydroxy acetate titanate, isopropyl triisostearoyl titanate, isopropyl tri (dioctyl) pyrophosphato titanate in the monoalkoxy form of titanate family, and A conductive resin composition for tee die extrusion coating, characterized in that it is selected from the group consisting of zinc stearate, magnesium oxide, and stearic acid comprising tetraoctyl di (datridecyl) phosphito titanate.

According to the second aspect of the present invention, in the method for producing a conductive tarpaulin sheet, the conductive carbon black master batch prepared according to the above is mixed with polyethylene resin in an appropriate ratio, and then produced into a conductive sheet using a tee die. A method is provided.

According to a third aspect of the present invention, in the method for producing a conductive tarpaulin sheet, the method is prepared as described above using tarpaulin or nonwoven fabric woven from polyethylene or polypropylene as a substrate in a single screw extruder having a die die form die. A method is provided for producing a conductive sheet by extrusion lamination onto a substrate using the composition.

Hereinafter, the conductive polyolefin resin composition according to a preferred embodiment of the present invention will be described in more detail.

The resin composition of the present invention may be a polyethylene resin, for example, having a melt index of 5 to 15 g / 10 minutes and a density of 0.910 to 0.949 g / cm 3 polymerized from ethylene and an α-olefin having 3 or more carbon atoms. Any one of low density polyethylene, medium density polyethylene, and linear low density polyethylene, or an ethylene copolymer such as ethylene homopolymer, ethylene vinyl acetate, ethylene ethyl acrylate, ethylene methyl acrylate and ethylene normal butyl acrylate, or two or more components Mixtures.

Carbon black used in the present invention is a conductive filler for imparting conductivity, has a particle diameter of 40 to 80 nm, a surface area of 50 or more m 2 / g, an apparent density of 0.2 to 0.9 g / cm 2 PH9 or less, and the content to be finally added to the composition is It is 30-60 weight part with respect to 100 weight part of base resins, and it adds and uses in a fixed ratio at the time of final conductive sheet manufacture. Here, the carbon black usage is 15 to 50% by weight of the weight before the master batch.

The antioxidant used in the present invention is an additive having an oxidation function of a product which is directly or indirectly received after manufacture, and is a phenolic antioxidant type such as 2,2-thio diethylbis- [3- (3,5-di -t-butyl-4-hydroxypedyl) -propionate] (2,2-thiodiethylbis- [3,5-di-tert-butyl-4-hydroxy phenyl) -propionate]), pentaerythryl-tetra Kiss- [3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate] (pentaaerythrityl-tetrakis [3,5-di-tert-butyl-4-hydroxy phenyl) -propionate] ), Octadecyl 3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate] (octadecyl 3- (3,5-di-tert-butyl-4-hydroxy phenyl-propionate) Or triethylene glycol-bis-3 (3,5-butyl-4-hydroxy-5methylphenyl) propionate alone or the like Combination forms of two or more types are used. The above.

The polydimethyl siloxane and polyethylene glycol used in the present invention are excellent in dispersing carbon black, which fulfills both the processing load, the processing load on the extruder when filling carbon black, and the economic advantages of reducing internal frictional heat. It is an additive added to improve.

Polydimethyl siloxane suitable for the above purpose may be used in the range of an average molecular weight of 10,000 to 100,000, polyethylene glycol may be used in the range of an average molecular weight of 200 to 10,000, can be used in combination of poly dimethyl siloxane and polyethylene glycol, poly methyl siloxane It can also be used alone.

The amount finally contained in the composition of polydimethyl saloxane and polyethylene glycol of the above object is 0.1 to 0.4 parts by weight based on 100 parts by weight of the base resin when polydimethyl siloxane is used alone, and polydimethyl siloxane and polyethylene glycol When used in combination, 0.1 to 0.4 parts by weight of polydimethyl siloxane and 0.05 to 0.2 parts by weight of polyethylene glycol have the optimum effect with respect to 100 parts by weight of the base resin.

Since poly dimethyl siloxane and polyethylene glycol are relatively viscous liquids, polydi- enes in the fine pores of carbon black can be prepared using a Henschel mixer prior to preparing the carbon black master batch to improve the dispersibility of the carbon used in the final composition. Used to prepare master batches after impregnation with methyl siloxane and polyethylene glycol.

In the present invention, the cuffing agent is a monoalkoxy form of bis (dioctyl phosphite hydroxy acetate titanate, isopropyltriisostearoyl titanate, isopropyl tri (dioctyl) pyrophosphatotita Nate, tetraoctyl di (datridecyl) phosphito titanate, and zinc stearate, calcium stearate, magnesium oxide, stearic acid, etc. The range is 0.05 to 0.1 parts by weight based on 100 parts by weight of the composition.

In this invention, the manufacturing method of the resin composition using the above-mentioned base resin and an additive consists of the following three manufacturing processes.

In the first step, polydimethyl siloxane and polyethylene glycol are impregnated into the fine pores of carbon black as a preliminary method for increasing the dispersibility of the carbon black, and then a small amount of carbon black master batches are used in preparation.

In the second step, a carbon black master batch is prepared in a short-barrier mixer in which the heating medium is maintained at 120 to 150 ° C., the carbon black and polyethylene copolymer impregnated with polyethylene glycol, and oxidation An inhibitor and a processing aid are added and kneaded for 10 to 30 minutes to prepare a final carbon black master batch.

In the third process, the master batch prepared in the second process and polyethylene are mixed at a predetermined ratio, and then a conductive resin capable of extrusion molding of a die by using a single screw or twin screw extruder is manufactured.

Hereinafter, the present invention will be described by way of example and comparative examples.

Example 1

In the first step, 0.1 to 0.4 parts by weight of polydimethylsiloxane and 0.05 to 0.2 parts by weight of polyethylene glycol are used, based on 100 parts by weight of carbon black, to produce impregnated carbon black, which is one step in the three process steps described above. It is used after impregnating polydimethylsiloxane and polyethylene glycol in fine pores of carbon black using a Henschel mixer.

In the second step, the Henschel mixer maintained at room temperature to prepare the conductive master batch in the impregnated carbon black prepared in the first step has a particle diameter of 40 to 60 nm, surface area of 40 to 60 cm 2 / g, apparent density of 0.2 to 0.3 g / After filling the carbon black having a cm 2, PH 9.0 or less, 0.5 parts by weight of KRTTS (iso-Pr triisostearoyltitanate), preferably 0.35 parts by weight, is added to 100 parts by weight of carbon black, and evenly sprayed 0.05 parts by weight of stearic acid as a processing aid. 60 parts by weight of the carbon black mixture is preferably added to 100 parts by weight of the polyolefin copolymer (density 0.936 / gcm 2, melt index 12, VA content 10%) in a half-barrier mixer maintained at 120-150 ° C. after kneading for 5 minutes. Preferably, 50 parts by weight was added and kneaded to finally prepare a conductive carbon black master batch containing carbon black, antioxidant, and cuffing agent polydiethyl siloxane.

In the third step, 40 parts by weight of 60 parts by weight of conductive carbon black master batch polyethylene (melting index 10, density 0.920 LDPE) were mixed in a tumble mixer for 5 minutes in a tumble mixer. Thereafter, 0.3 parts by weight of antioxidant was added to the mixture, and a resin for tee die extrusion coating was prepared using a single screw or twin screw extruder.

The prepared conductive extrusion coating resin was laminated on tarpaulin using a uniaxial extruder for tee die under the following conditions to prepare a conductive tarpaulin sheet.

Characterization was performed using the conductive tarpaulin prepared under the above conditions, and the results are shown below.

Conductive Tarpaulin Extrusion Laminated Sheet Manufacturing Conditions

Instrument: 90Φ extruder L / D 33

Screw: Standard Single Screw Compression Ratio-3: 1

Die: T straight die

Base material used: Tarpaulin woven from polypropylene and polyethylene

Extruder temperature:

Extruder cylinder C _{1 -} 200 ℃

Extruder cylinder C ₂ - 220 ℃

Extruder cylinder ₃ C - 235 ℃

Extruder cylinder C ₄ - 260 ℃

Extruder cylinder C ₅ - 260 ℃

Extruder head 1-260 ℃

Extruder head 2-270 ℃

T die extruder _{T 1 ~ T 7 - 280 ~} 290 ℃

Speed: 30 m / min

Lamination Thickness: 400 ㎛

Example 2

A conductive master batch was prepared without using carbon black impregnated with the polyethylene glycol prepared in Example 1.

The remaining composition is the same as in Example 1 and was subjected to die die extrusion under the same conditions as in Example 1 to prepare a conductive tarpaulin extruded laminated sheet.

Example 3

A carbon black buster batch was prepared using the carbon black of Comparative Example 1 without using carbon black impregnated with the polyethylene glycol prepared in Example 1.

The remaining composition is the same as in Example 1 and was subjected to die die extrusion under the same conditions as in Example 1 to prepare a conductive tarpaulin extruded laminated sheet.

Example 4

A conductive carbon black master batch was prepared using the impregnated carbon black prepared in Example 1, and the polyolefin copolymer (density 0.935 g / cm 2, melt index 5, VA content 10%) was present in 60 parts by weight of the conductive carbon black master batch. 40 parts by weight was added, 0.3 parts by weight of antioxidant was added to the mixture, which was mixed for 5 minutes in a tumbler mixer, and then the resin for tee die extrusion coating was prepared using this mixture using a single screw or twin screw extruder.

The prepared conductive extrusion corty resin was subjected to die-die extrusion under the same conditions as in Example 1 to prepare a conductive tarpaulin extruded laminated sheet.

Characterization was performed using the conductive tarpaulin produced under the above conditions, and the results are shown in Table 1.

Comparative Example 1

In order to prepare a conductive master batch using carbon black impregnated with the same polyethylene glycol as in Example 1, the Henschel mixer maintained at room temperature had a particle diameter of 15 to 30 nm, a surface area of 80 to 150 m 2 / g, and an apparent density of 0.35 to 0.36 g / After filling the carbon black having a cm 2 and a pH of 8.0 or less, 0.5 parts by weight of iso-Pr triisostearoyl titanate (KRTTS), preferably 0.35 parts by weight, is sprinkled evenly with 0.05 parts by weight of stearic acid as a processing aid. After kneading for 5 minutes, 60 parts by weight of the carbon black mixture was added to 100 parts by weight of the polyolefin copolymer (density 0.936 g / cm 2, melt index 12, VA content 10%) in a half-barrier mixer maintained at 120 to 150 ° C. And, preferably, 50 parts by weight is kneaded to finally prepare a conductive carbon black master batch containing carbon black, antioxidant, and cuffing agent polydiethyl siloxane. It was.

50 parts by weight of the conductive carbon black master batch prepared above and 50 parts by weight of polyolefin copolymer (density 0.936 g / cm 2, melt index 5, VA content 10%) to make an extrusion coating resin for a tee die for 5 minutes in a tumbler mixer. After mixing, the kneaded material was prepared using a single screw or twin screw extruder to prepare a resin for tee die extrusion coating.

The prepared conductive extrusion coating resin was laminated on tarpaulin using a uniaxial extruder for tee die under the conditions of Example 1 to prepare a conductive tarpaulin sheet.

Properties Test Methods Example 1 Example 2 Example 3 Example 4 Comparative Example 1 Melting Index (g / 10min) ASTM D1238 3.0 2.5 2.5 4.0 2.5 Tensile Sensitivity (kg / ㎠) ASTM D638 110 105 105 115 105 Elongation (%) ASTM D638 80 50 80 100 80 Extrusion load (A) 57 56 60 50 60 Extrusion ratekg / min 1.8 1.8 1.7 2.0 1.7 Neck-in ¹⁾ (mm) 5 5 4 15 4 Peel Strength ²⁾ (kg / 15㎜) ASTM D1876-72 Inability to peel Peeling middle Inability to peel Inability to peel Inability to peel Volume resistivity ³ ) (Ω㎝) ASTM D186-72 2 × 10 ² 3 × 10 ³ 3 × 10 ⁸ 2 × 10 ² 2 × 10 ⁹ Extrusion appearance Smoothness middle Roughness Smoothness Roughness

1) Length of more resin used at both ends of T-die 1500mm width standard

2) Strength of 180 ° C T-shape of 15mm width specimen

3) volume resistivity

_{VR = R v · A / T} = Ω㎝

VR: Volume resistivity, T: Material thickness, R _v : Volume resistivity A: Ground area

According to the present invention, the conductive polyolefin resin composition can be produced by one extrusion process with excellent conductivity and with very good adhesion upon lamination with the substrate used, in particular tarpaulin.

In addition, it is possible to drastically reduce the equipment cost and the operating cost, and to easily adjust the degree of conductivity desired by the user to process.

In addition, it has excellent conductivity and excellent stability at a constant temperature and is possible in a product requiring a constant temperature conductive polyolefin resin composition and a method for producing a tarpaulin laminated conductive sheet using the same.

Claims (12)

0.2 to 2.0 parts by weight of silane, 0.01 to 0.05 parts by weight of crosslinking agent, 30 to 40 parts by weight of conductive carbon black, 0.05 to 0.2 parts by weight of antioxidant, and 0.2 to 0.5 parts by weight of cuffing agent based on 100 parts by weight of polyolefin resin as the base resin. And 0.02 to 0.1 parts by weight of the processing aid. The polyolefin resin according to claim 1, wherein the polyolefin resin, which is a base resin, has a melt index of 5 to 20 g / 10 minutes polymerized with ethylene and an α-olefin having at least 3 carbon atoms, ultra low density polyethylene, a low density polyethylene, and a medium density of 0.910 to 0.950. Polyethylene, linear low-density polyethylene, ethylene vinyl acetate, ethylene ethyl acrylate, and ethylene methyl acrylate alone or a mixture of two or more components of the conductive resin composition for the die die extrusion coating. The conductive resin composition of claim 1, wherein the conductive resin composition comprises at least one of polydimethyl saloxane and polyethylene glycol. 4. The conductive resin composition for tee die extrusion coating according to claim 3, wherein the content of poly to methyl siloxane is 0.1 to 0.4 parts by weight based on 100 parts by weight of the base resin when the poly dimethyl siloxane is added alone. The method of claim 3, wherein when poly dimethyl siloxane and polyethylene glycol are added, the poly dimethyl siloxane is 0.1 to 0.4 part by weight and polyethylene glycol is 0.05 to 0.2 part by weight based on 100 parts by weight of the base resin. Conductive resin composition for die extrusion coating. The silane of claim 1 wherein the silane is selected from the group consisting of vinyl trimethoxy silane, vinyl triethoxy silane, vinyl difluoro silane, vinyl dibromo silane, divinyl dichloro silane, and vinyl trinormal butoxy silane. A conductive resin composition for t die extrusion coating, characterized in that. The crosslinking agent of claim 1, wherein the crosslinking agent is t-butyl cumyl peroxide, dicumyl peroxide, methyl ethyl ketone peroxide, 2,5-dimethyl-2,5-di (t-butyl peroxy hexane, di-t-butyl Peroxide-t-butyl peroxide, t-butyl peroxy benzoate, and α, α-bis (t-butyl peroxy isopropyl) benzene, conductive resin composition for the die die extrusion coating, characterized in that selected from the group consisting of . The carbon die according to claim 1, wherein the carbon black has a particle diameter of 40 to 60 mm, a surface area of 40 to 60 m 2 / g, an apparent density of 0.2 to 0.3 g / cm 2, a pH of 9.5 or less, and an impurity (ash residue) of 500 ppm or less. Conductive resin composition for extrusion coating. The method of claim 1, wherein the antioxidant is 2,2-thio diethyl bis- [3- (3,5-di-t-butyl-4-hydroxy phenyl) -propionate], pentaerytrityl-tetra Keith- [3- (3,5-di-t-butyl-4-hydroxyphenyl) -propionate-], octadecyl 3- (3,5-di-t-butyl-4-hydroxyphenyl) T-die selected from the group consisting of propionate triethylene glycol-bis-3 (3-t-butyl-4-hydroxy-5methylphenyl) propionate, and dilauryl thiodipropionate Conductive resin composition for extrusion coating. The cuffing agent of claim 1, wherein the cuffing agent is a bis (dioctyl) phosphite hydroxy acetate titanate, isopropyl triisostearoyl titanate, isopropyl tri (dioctyl) fatigue in the monoalkoxy form of the titanate family. Conductive resin for tee die extrusion coating, characterized in that it is selected from the group consisting of zinc stearate, magnesium oxide, and stearic acid, including phosphato titanate, and tetraoctyl di (datridecyl) phosphito titanate Composition. In the method of manufacturing a conductive tarpaulin sheet, A method for producing a conductive sheet using a tee die after mixing the conductive carbon black master batch prepared in accordance with claims 1 to 10 and polyethylene resin in an appropriate ratio. In the method for producing the conductive tarpaulin sheet, A method for producing a conductive sheet by extrusion lamination onto a substrate using a composition prepared according to claims 1 to 10 using tarpaulin or nonwoven fabric woven from polyethylene or polypropylene as a substrate in a single screw extruder having a die die form die.