Vinyl chloride resin composition and conductive sheet

Abstract

To provide a vinyl chloride-based resin composition which is excellent in conductivity, suppresses bleeding of a plasticizer and can maintain conductivity over a long period of time.SOLUTION: A vinyl chloride-based resin composition satisfies the following conditions (1) to (5). (1) The vinyl chloride-based resin composition contains a vinyl chloride-based resin, a plasticizer and an antistatic agent; (2) the total of the plasticizer and the antistatic agent is 30-70 pts.mass with respect to 100 pts.mass of the vinyl chloride-based resin; (3) the ratio of the total of a conductive plasticizer and the antistatic agent with respect to the total of the plasticizer and the antistatic agent is 10-100 mass%; (4) the conductive plasticizer contains a phthalate-based conductive plasticizer and an adipate-based conductive plasticizer; and (5) the antistatic agent is a surfactant-based antistatic agent and / or an aliphatic acid-based antistatic agent.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a vinyl chloride resin composition and a conductive sheet. [Background technology]

[0002] Polyvinyl chloride resins are used in a variety of fields because they have excellent flame retardancy and their mechanical properties and moldability can be easily adjusted. One application of polyvinyl chloride resins is as flooring materials in clean rooms.

[0003] Flooring materials used in clean rooms are required to have strict dust resistance. Therefore, many conductive sheets have been proposed in which conductive materials are added to polyvinyl chloride resin. Examples of the conductive materials include conductive carbon such as carbon black, metal fibers such as stainless steel fibers, and metal particles such as tin oxide (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2009-83270 A Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, in order to improve the conductivity of a conductive sheet, it is effective to use a surfactant-based antistatic agent, a fatty acid-based antistatic agent, and an adipate-based conductive plasticizer in combination. However, if a large amount of these are blended, they bleed out of the conductive sheet, impairing the conductivity and making it impossible to maintain the conductivity for a long period of time.

[0006] Also, a technique is known in which a large amount of inorganic filler such as calcium carbonate is blended into a polyvinyl chloride resin in order to suppress deformation such as expansion and contraction of the conductive sheet. However, although this method suppresses deformation, it reduces the conductivity, which means that a large amount of conductive carbon or metal fiber, etc., as described above, must be blended, and when conductive carbon is used, the sheet becomes only black, which reduces the design, and the hardness increases, which causes problems in that the cushioning properties of the conductive sheet deteriorate.

[0007] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a vinyl chloride resin composition and a conductive sheet that have excellent electrical conductivity and can maintain electrical conductivity for a long period of time by suppressing bleeding of a plasticizer. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the "vinyl chloride resin composition" according to the present invention is characterized by the following [1] to [3]. [1] The vinyl chloride resin composition must satisfy all of the following conditions (1) to (5): (1) The vinyl chloride resin composition contains a vinyl chloride resin, a plasticizer, and an antistatic agent. (2) The total amount of the plasticizer and the antistatic agent is 30 to 70 parts by mass per 100 parts by mass of the vinyl chloride resin. (3) The total ratio of the conductive plasticizer and the antistatic agent to the total of the plasticizer and the antistatic agent is 10 to 100% by mass. (4) The conductive plasticizer includes a phthalate ester-based conductive plasticizer and an adipate ester-based conductive plasticizer. (5) The antistatic agent is a surfactant-based antistatic agent and / or a fatty acid-based antistatic agent. [2] In the vinyl chloride resin composition according to the above item [1], The composition further comprises 5 to 400 parts by mass of an inorganic filler, based on 100 parts by mass of the vinyl chloride resin. [3] In the vinyl chloride resin composition according to the above [1] or [2], The composition further comprises 5 parts by mass or less of a linear alkylbenzene sulfonate per 100 parts by mass of the vinyl chloride resin.

[0009] According to the vinyl chloride resin composition having the configuration [1] above, the composition contains a vinyl chloride resin, a plasticizer, and an antistatic agent, the total amount of the plasticizer and the antistatic agent, and the total ratio of the conductive plasticizer and the antistatic agent in the plasticizer are set within specific ranges, and the types of the conductive plasticizer and the antistatic agent are specified. That is, (1) the vinyl chloride resin composition contains a vinyl chloride resin, a plasticizer, and an antistatic agent, (2) the total amount of the plasticizer and the antistatic agent is 30 to 70 parts by mass per 100 parts by mass of the vinyl chloride resin, (3) the total ratio of the conductive plasticizer and the antistatic agent to the total amount of the plasticizer and the antistatic agent is 10 to 100 mass%, (4) the conductive plasticizer contains a phthalate ester-based conductive plasticizer and an adipate ester-based conductive plasticizer, and (5) the antistatic agent is a surfactant-based antistatic agent and / or a fatty acid-based antistatic agent. As described above, in order to improve the electrical conductivity, it is effective to use a surfactant-based antistatic agent, a fatty acid-based antistatic agent, and an adipate-based conductive plasticizer in combination, but when a large amount of these are added, there is a problem that they bleed from the conductive sheet and the electrical conductivity cannot be maintained for a long period of time. In the present invention, by specifying the amount of the plasticizer and the antistatic agent to be added as in (1) and (2) above, and further specifying the type of the conductive plasticizer and the antistatic agent and the amount of the conductive plasticizer and the antistatic agent to be added as in (3) to (5) above, it is possible to provide a vinyl chloride resin composition that has excellent electrical conductivity and can maintain electrical conductivity for a long period of time by suppressing the bleeding of the plasticizer.

[0010] According to the vinyl chloride resin composition of the above-mentioned configuration [2], 5 to 400 parts by mass of an inorganic filler is further blended with respect to 100 parts by mass of the vinyl chloride resin. As described above, in order to suppress the deformation property represented by the expansion and contraction of the conductive sheet, a technique of blending a large amount of an inorganic filler such as calcium carbonate with the vinyl chloride resin is also known, but there is a problem that the hardness increases and the cushioning property of the obtained conductive sheet deteriorates. In the vinyl chloride resin composition having the above configuration [2], the blending amount of the inorganic filler is within an appropriate range, so that an increase in hardness can be suppressed and the cushioning property of the obtained conductive sheet can be improved.

[0011] According to the vinyl chloride resin composition having the above configuration [3], by further blending 5 parts by mass or less of a linear alkylbenzene sulfonate with respect to 100 parts by mass of the vinyl chloride resin, it is possible to provide a vinyl chloride resin composition which prevents deterioration of electrical conductivity due to hygroscopicity.

[0012] Furthermore, in order to achieve the above-mentioned object, the "conductive sheet" according to the present invention is characterized by the following [4] to [5]. [4] The conductive sheet is a molded product of the vinyl chloride resin composition according to any one of the above [1] to [3]. [5] The conductive sheet described in [4] above has a surface resistance between two points of 2.5 x 10 4 Ω~1.0×10 7 Ω, and the upper and lower resistance measured in accordance with NFPA99 is 2.5×10 4 Ω~1.0×10 7 Ω and the hardness measured in accordance with JIS K7215 is 73 to 95.

[0013] According to the conductive sheet having the configuration [4] above, a molded product of the vinyl chloride resin composition described in any one of [1] to [3] above is used, so that a conductive sheet can be provided which has excellent electrical conductivity and can maintain electrical conductivity for a long period of time by suppressing bleeding of the plasticizer.

[0014] According to the conductive sheet having the configuration [5] above, since the surface resistance between two points measured in accordance with NFPA99 is within a specific range, a conductive sheet having excellent conductivity can be provided. Since the top-to-bottom resistance measured in accordance with NFPA99 is within a specific range, a conductive sheet having excellent conductivity can be provided. Since the hardness measured in accordance with JIS K7215 is within a specific range, a conductive sheet having excellent cushioning properties can be provided. Effect of the Invention

[0015] According to the present invention, it is possible to provide a vinyl chloride resin composition and a conductive sheet which are excellent in electrical conductivity and capable of maintaining electrical conductivity for a long period of time by suppressing bleeding of a plasticizer.

[0016] The present invention has been briefly described above. The details of the present invention will be further clarified by reading the following description of the preferred embodiments of the present invention (hereinafter, referred to as "embodiments"). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, one embodiment of the vinyl chloride resin composition according to the present invention will be described.

[0018] The vinyl chloride resin used in the vinyl chloride resin composition of the present invention is not particularly limited, and examples thereof include a homopolymer of vinyl chloride, a copolymer of a vinyl chloride monomer and another monomer copolymerizable with the vinyl chloride monomer, a graft copolymer in which a polymer other than a polyvinyl chloride resin is graft-copolymerized with a vinyl chloride monomer, etc. The polyvinyl chloride resin may be used alone or in combination of two or more kinds.

[0019] Examples of other monomers copolymerizable with the vinyl chloride monomer include α-olefins such as ethylene, propylene, butylene, vinyl esters such as vinyl acetate, vinyl propionate, vinyl ethers such as butyl vinyl ether, cetyl vinyl ether, (meth)acrylic acid esters such as methyl (meth)acrylate, ethyl (meth)acrylate, butyl acrylate, aromatic vinyls such as styrene, α-methylstyrene, N-substituted maleimides such as N-phenylmaleimide, N-cyclohexylmaleimide, etc. The other monomers may be used alone or in combination of two or more.

[0020] The average polymerization degree of the vinyl chloride resin is preferably 800 to 3,000, and more preferably 800 to 2,000.

[0021] As the plasticizer used in the vinyl chloride resin composition of the present invention, the use of two conductive plasticizers, a phthalate ester conductive plasticizer and an adipate ester conductive plasticizer, is essential. As described above, in order to improve conductivity, it is effective to use a surfactant-based antistatic agent, a fatty acid-based antistatic agent, and an adipic acid ester-based conductive plasticizer in combination, but when a large amount of these are mixed, they bleed out of the conductive sheet, making it impossible to maintain conductivity for a long period of time. In the present invention, by using a phthalic acid ester-based conductive plasticizer, the bleeding of the adipic acid ester-based conductive plasticizer and the antistatic agent is suppressed, and this problem can be solved.

[0022] An example of the phthalate-based conductive plasticizer is dibutoxyethyl phthalate represented by the following formula.

[0023] [ka]

[0024] An example of the adipate-based conductive plasticizer is dibutoxyethyl adipate.

[0025] As the phthalate ester-based conductive plasticizer and the adipate ester-based conductive plasticizer, commercially available products can be used. For example, LV-848 manufactured by ADEKA CORPORATION is an example of a phthalate ester-based conductive plasticizer, and LV-808 manufactured by ADEKA CORPORATION is an example of an adipate ester-based conductive plasticizer.

[0026] In addition, plasticizers other than those mentioned above can also be used in the vinyl chloride resin composition of the present invention. Examples of such plasticizers include high molecular weight plasticizers such as phthalate esters {e.g., dioctyl phthalate (DOP), diisononyl phthalate (DINP), diisodecyl phthalate (DIDP), diundecyl phthalate (DUP), etc.}, trimellitate esters {e.g., trioctyl trimellitate (TOTM), tri-normal octyl trimellitate (TnOTM), etc.}, and polyesters.

[0027] As the antistatic agent used in the vinyl chloride resin composition of the present invention, a surfactant-based antistatic agent and / or a fatty acid-based antistatic agent is used. The surfactant-based antistatic agent is not particularly limited, and examples thereof include known anionic, cationic, nonionic, betaine, and the like. Examples of the anionic surfactant-based antistatic agent include alkyl sulfate type, alkylaryl sulfate type, alkyl phosphate type, alkylamine sulfate type, and alkylsulfonic acid type. Examples of cationic surfactant-based antistatic agents include quaternary ammonium salt types, quaternary ammonium resin types, imidazoline types, and alkylamine sulfate types. Examples of non-ionic surfactant-based antistatic agents include sorbitan type, ether type, amine and amide type, and ethanolamide type. Among these, cationic surfactant-based antistatic agents are preferred from the viewpoints of suppressing bleeding and improving electrical conductivity.

[0028] Among the antistatic agents, the cationic surfactant-based antistatic agent is particularly effective in suppressing bleeding and improving electrical conductivity. Examples of cationic surfactant-based antistatic agents include ammonium perchlorate and barium perchlorate. As the cationic surfactant-based antistatic agent, commercially available products can be used, for example, LV-70 manufactured by ADEKA Corporation.

[0029] The fatty acid-based antistatic agent is an antistatic agent containing a fatty acid such as stearic acid or lauric acid, and examples thereof include glycerin fatty acid esters and sorbitan fatty acid esters. Specific examples thereof include glycerin monostearate, citric acid fatty acid monoglyceride, decaglycerin laurate, and sorbitan laurate.

[0030] The vinyl chloride resin composition of the present invention must satisfy all of the following conditions (1) to (5). (1) The vinyl chloride resin composition contains a vinyl chloride resin, a plasticizer, and an antistatic agent. (2) The total amount of the plasticizer and the antistatic agent is 30 to 70 parts by mass per 100 parts by mass of the vinyl chloride resin. (3) The total ratio of the conductive plasticizer and the antistatic agent to the total of the plasticizer and the antistatic agent is 10 to 100% by mass. (4) The conductive plasticizer includes a phthalate ester-based conductive plasticizer and an adipate ester-based conductive plasticizer. (5) The antistatic agent is a surfactant-based antistatic agent and / or a fatty acid-based antistatic agent.

[0031] In the condition (2), the total amount of the plasticizer and the antistatic agent is more preferably 30 to 60 parts by mass relative to 100 parts by mass of the vinyl chloride resin. The proportion of the plasticizer relative to the total amount of the plasticizer and the antistatic agent is preferably 15 to 100% by mass. In the above condition (3), the ratio of the total of the conductive plasticizer and the antistatic agent to the total of the plasticizer and the antistatic agent is more preferably 20 to 100% by mass. In this specification, the conductive plasticizer and the antistatic agent are different. As is well known, the conductive plasticizer refers to a compound that has electrical conductivity and imparts a plasticizing effect to an object. The antistatic agent in this specification refers to a compound other than the conductive plasticizer and that imparts an antistatic effect to an object.

[0032] The vinyl chloride resin composition of the present invention is preferably in a form in which 5 to 400 parts by mass of an inorganic filler is further blended with respect to 100 parts by mass of the vinyl chloride resin. According to this form, the blending amount of the inorganic filler is in an appropriate range, and an increase in hardness can be suppressed, and the cushioning property of the obtained conductive sheet can be improved. Examples of inorganic fillers include calcium carbonate, calcined clay, talc, and silica. In the vinyl chloride resin composition of the present invention, the blending amount of the inorganic filler is preferably 40 to 300 parts by mass, and more preferably 40 to 250 parts by mass, based on 100 parts by mass of the vinyl chloride resin.

[0033] The vinyl chloride resin composition of the present invention is preferably further formulated with 5 parts by mass or less of linear alkylbenzene sulfonate per 100 parts by mass of the vinyl chloride resin. This formulation can prevent the deterioration of electrical conductivity due to hygroscopicity. Linear alkylbenzene sulfonate is known, and a representative example is linear sodium alkylbenzene sulfonate. In the vinyl chloride resin composition of the present invention, the amount of the linear alkylbenzene sulfonate is preferably 1 to 5 parts by mass based on 100 parts by mass of the vinyl chloride resin.

[0034] The vinyl chloride resin composition of the present invention may further contain, as necessary, known stabilizers, lubricants, flame retardants, crosslinking agents, carbon, processing aids, colorants, etc. The amounts of these additives may also be arbitrary as long as they do not impair the effects of the present invention.

[0035] The vinyl chloride resin composition of the present invention can be easily prepared by kneading the various materials described above using a known kneader.

[0036] The conductive sheet of the present invention comprises a molded product of the vinyl chloride resin composition of the present invention. Therefore, the conductive sheet of the present invention has excellent conductivity and can maintain its conductivity for a long period of time by suppressing bleeding of the plasticizer.

[0037] The conductive sheet of the present invention can be produced by preparing the vinyl chloride resin composition of the present invention and then subjecting it to a conventionally known method such as extrusion molding, injection molding, calendar molding, or press molding.

[0038] The conductive sheet of the present invention preferably has a thickness of 1.85 mm to 2.65 mm.

[0039] In a preferred embodiment of the present invention, the conductive sheet of the present invention has a two-point surface resistance measured in accordance with NFPA99 of 2.5×10 4 Ω~1.0×10 7 In this embodiment, a conductive sheet having excellent conductivity can be provided.

[0040] In a preferred embodiment of the present invention, the conductive sheet of the present invention has a top-to-bottom resistance of 2.5×10 4 Ω~1.0×10 7 In this embodiment, a conductive sheet having excellent conductivity can be provided.

[0041] In a preferred embodiment of the present invention, the conductive sheet of the present invention has a hardness measured in accordance with JIS K7215 of preferably 73 to 95, and more preferably 73 to 92. In this embodiment, a conductive sheet having excellent cushioning properties can be provided.

[0042] The conductive sheet of the present invention is particularly suitable as a flooring material in a clean room. EXAMPLES

[0043] The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0044] Based on the materials and amounts listed in Tables 1 to 5 below, each component was kneaded in a kneader to prepare various vinyl chloride resin compositions. Next, each vinyl chloride resin composition was extrusion molded to produce conductive sheets suitable for the various test methods listed below. Each conductive sheet had a thickness of 2.0 mm.

[0045] The various materials used in the examples and comparative examples are as follows. Vinyl chloride resin: TK-1000 (manufactured by Shin-Etsu Chemical Co., Ltd., average degree of polymerization based on JIS K6720-2 = 1030) Phthalate-based conductive plasticizer (dibutoxyethyl phthalate): LV-848 (ADEKA Corporation) Adipate-based conductive plasticizer (dibutoxyethyl adipate): LV-808 (ADEKA Corporation) Cationic antistatic agent (ammonium perchlorate): LV-70 (ADEKA Corporation) Fatty acid-based antistatic agent (glycerin fatty acid ester): Rikemal S-100 (manufactured by Riken Vitamin Co., Ltd.) Other plasticizers: Diisononyl phthalate (DINP) (manufactured by J-Plus Corporation) Inorganic filler: Softon 1500 (calcium carbonate manufactured by Shiraishi Calcium Co., Ltd.) Stabilizer: RUP-14, AC-186 (ADEKA Corporation) Linear alkylbenzene sulfonate sodium (Lion Specialty Chemicals Co., Ltd. product name LH-200)

[0046] The various conductive sheets thus produced were measured for the following physical properties. -Hardness (measured according to JIS K7215) - Surface resistance between two points (measured in accordance with NFPA99) - Resistance between top and bottom (measured in accordance with NFPA99) Bleeding (The conductive sheet is 2 mm thick, 5 inches x 1 / 5 inches in size, folded in half, and left at room temperature for 168 hours, and the presence or absence of plasticizer seepage from the inside of the folded part is confirmed. If there is almost no bleeding, it is marked as ○, if there is some bleeding, it is marked as △, and if there is bleeding, it is marked as ×.)

[0047] The results are shown in Tables 1 to 5 below.

[0048] [Table 1]

[0049] [Table 2]

[0050] [Table 3]

[0051] [Table 4]

[0052] [Table 5]

[0053] From the results of each of the Examples in Tables 1 to 5, it was found that when the following conditions are satisfied: (1) the vinyl chloride resin composition contains a vinyl chloride resin, a plasticizer, and an antistatic agent; (2) the total amount of the plasticizer and the antistatic agent is 30 to 70 parts by mass relative to 100 parts by mass of the vinyl chloride resin; (3) the total amount of the conductive plasticizer and the antistatic agent is 10 to 100% by mass relative to the total amount of the plasticizer and the antistatic agent; (4) the conductive plasticizer contains a phthalate ester-based conductive plasticizer and an adipate ester-based conductive plasticizer; and (5) the antistatic agent is a surfactant-based antistatic agent and / or a fatty acid-based antistatic agent, a conductive sheet molded from the composition has excellent conductivity, can suppress bleeding of the plasticizer, and can maintain conductivity for a long period of time, and has appropriate hardness and excellent cushioning properties.

[0054] In Comparative Example 1, the ratio of the total of the conductive plasticizer and the antistatic agent to the total of the plasticizer and the antistatic agent was approximately 6.7 mass %, which is below the lower limit specified in the present invention, so that the hardness increased, the cushioning property was poor, and the conductivity deteriorated. In Comparative Examples 2 to 4, the total amount of the plasticizer and antistatic agent was 29 parts by mass per 100 parts by mass of the vinyl chloride resin, which was below the lower limit specified in the present invention, and therefore it was not possible to simultaneously satisfy the requirements for hardness and electrical conductivity. In Comparative Example 5, the ratio of the total of the conductive plasticizer and the antistatic agent to the total of the plasticizer and the antistatic agent was about 8.6 mass %, which was below the lower limit defined in the present invention, and therefore the conductivity was deteriorated. In Comparative Examples 6 to 8, the total amount of the plasticizer and antistatic agent was 71 parts by mass per 100 parts by mass of the vinyl chloride resin, which exceeded the upper limit specified in the present invention, and therefore the hardness decreased and the cushioning properties deteriorated. In Comparative Examples 9 to 10 and 13 to 14, since no phthalate ester-based conductive plasticizer was blended, the hardness, conductivity, and bleeding properties could not be simultaneously satisfied. In Comparative Examples 11 to 12 and 15 to 16, since no adipate-based conductive plasticizer was blended, the hardness increased or decreased, and the cushioning properties deteriorated.

[0055] The present invention is not limited to the above-described embodiments, and various modifications can be adopted within the scope of the present invention. For example, the present invention is not limited to the above-described embodiments, and appropriate modifications, improvements, etc. are possible. In addition, the material, shape, size, number, arrangement location, etc. of each component in the above-described embodiments are arbitrary as long as the present invention can be achieved, and are not limited.

[0056] Here, the features of the embodiments of the vinyl chloride resin composition and the conductive sheet according to the present invention described above will be briefly summarized and listed in the following [1] to [5]. [1] A vinyl chloride resin composition which satisfies all of the following conditions (1) to (5): (1) The vinyl chloride resin composition contains a vinyl chloride resin, a plasticizer, and an antistatic agent. (2) The total amount of the plasticizer and the antistatic agent is 30 to 70 parts by mass per 100 parts by mass of the vinyl chloride resin. (3) The total ratio of the conductive plasticizer and the antistatic agent to the total of the plasticizer and the antistatic agent is 10 to 100% by mass. (4) The conductive plasticizer includes a phthalate ester-based conductive plasticizer and an adipate ester-based conductive plasticizer. (5) The antistatic agent is a surfactant-based antistatic agent and / or a fatty acid-based antistatic agent. [2] In the vinyl chloride resin composition of the above [1], A vinyl chloride resin composition further comprising 5 to 400 parts by mass of an inorganic filler blended with 100 parts by mass of the vinyl chloride resin. [3] In the vinyl chloride resin composition of the above [1] or [2], A vinyl chloride resin composition further comprising 5 parts by mass or less of a linear alkylbenzene sulfonate per 100 parts by mass of the vinyl chloride resin. [4] A conductive sheet which is a molded product of the vinyl chloride resin composition according to any one of the above [1] to [3]. [5] In the conductive sheet of the above [4], The surface resistance between two points measured in accordance with NFPA99 is 2.5 x 10 4 Ω~1.0×10 7 Ω, The upper and lower resistance measured in accordance with NFPA99 is 2.5 x 10 4 Ω~1.0×10 7 Ω, The hardness measured in accordance with JIS K7215 is 73 to 95. Conductive sheet.

Claims

1. A vinyl chloride resin composition which satisfies all of the following conditions (1) to (5): (1) The vinyl chloride resin composition contains a vinyl chloride resin, a plasticizer, and an antistatic agent. (2) The total amount of the plasticizer and the antistatic agent is 30 to 70 parts by mass per 100 parts by mass of the vinyl chloride resin. (3) The total ratio of the conductive plasticizer and the antistatic agent to the total of the plasticizer and the antistatic agent is 10 to 100% by mass. (4) The conductive plasticizer includes a phthalate ester-based conductive plasticizer and an adipate ester-based conductive plasticizer, the phthalate ester-based conductive plasticizer is dibutoxyethyl phthalate, and the adipate ester-based conductive plasticizer is dibutoxyethyl adipate. (5) The antistatic agent is a surfactant-based antistatic agent, or a surfactant-based antistatic agent and a fatty acid-based antistatic agent, and the surfactant-based antistatic agent is a quaternary ammonium salt type surfactant-based antistatic agent.

2. 2. The vinyl chloride resin composition according to claim 1, further comprising 5 to 400 parts by mass of an inorganic filler per 100 parts by mass of the vinyl chloride resin.

3. 3. The vinyl chloride resin composition according to claim 1, further comprising 5 parts by mass or less of a linear alkylbenzene sulfonate per 100 parts by mass of the vinyl chloride resin.

4. A conductive sheet which is a molded product of the vinyl chloride resin composition according to any one of claims 1 to 3.

5. The surface resistance between two points measured in accordance with NFPA99 is 2.5 x 10 ４ Ω~1.0×10 ７ Ω, The upper and lower resistance measured in accordance with NFPA99 is 2.5 x 10 ４ Ω~1.0×10 ７ Ω, The hardness measured in accordance with JIS K7215 is 73 to 95. The conductive sheet according to claim 4 .

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