Polyvinyl chloride resin composition and polyvinyl chloride sheet containing the same

Abstract

To provide a polyvinyl chloride resin composition and a polyvinyl chloride sheet containing the composition, the composition achieving low odor while inhibiting reductions in conductivity, heat stability, and peelability.SOLUTION: The polyvinyl chloride resin composition contains a polyvinyl chloride resin, barium sulfate, talc, and a stabilizer having a melting point of 75°C or higher, and, relative to 100 pts.mass of the polyvinyl chloride resin, a total content of the barium sulfate and the talc is 3-30 pts.mass, and a content of the stabilizer is 3-15 pts.mass, and furthermore a ratio of the content of the talc to the content of the barium sulfate is 1-2.SELECTED DRAWING: None

Description

[Technical Field]

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

[0002] Electric wires coated with vinyl chloride resin compositions have good flexibility and flame retardancy, and are therefore widely used as power electric wires. Liquid stabilizers are often used in vinyl chloride resin compositions to improve thermal stability and lubricity. However, liquid stabilizers generally have a strong odor, which limits the locations where they can be used depending on the environment, such as ventilation conditions.

[0003] Therefore, the odor can be reduced by using a powdered stabilizer instead of a liquid stabilizer.Patent Document 1 discloses that a powdered metal stabilizer can be used as a heat stabilizer for a vinyl chloride resin sheet. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-97535 Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a powdery stabilizer is used in a vinyl chloride resin composition as in Patent Document 1, there are problems such as a decrease in electrical conductivity, and poor thermal stability and releasability during sheet formation.

[0006] The present invention has been made in view of the problems inherent in the prior art, and an object of the present invention is to provide a vinyl chloride resin composition that is low in odor and that suppresses deterioration in electrical conductivity, thermal stability, and releasability, and a vinyl chloride sheet containing the same. [Means for solving the problem]

[0007] A vinyl chloride resin composition according to an embodiment of the present invention contains vinyl chloride resin, barium sulfate, talc, and a stabilizer having a melting point of 75°C or higher, wherein the total content of the barium sulfate and talc is 3 parts by mass or more and 30 parts by mass or less, the content of the stabilizer is 3 parts by mass or more and 15 parts by mass or less, and the ratio of the content of talc to the content of barium sulfate is 1 or more and 2 or less, relative to 100 parts by mass of the vinyl chloride resin.

[0008] A vinyl chloride sheet according to another embodiment of the present invention comprises a vinyl chloride resin composition. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a vinyl chloride resin composition that is low in odor and that suppresses deterioration in electrical conductivity, thermal stability, and releasability, and a vinyl chloride sheet containing the same. DETAILED DESCRIPTION OF THE INVENTION

[0010] The vinyl chloride resin composition according to this embodiment and the vinyl chloride sheet containing the same will be described in detail below.

[0011] [Vinyl chloride resin composition] The vinyl chloride resin composition according to this embodiment contains a vinyl chloride resin, barium sulfate, talc, and a stabilizer having a melting point of 75° C. or higher.

[0012] (Vinyl chloride resin) The vinyl chloride resin composition contains a vinyl chloride resin. The vinyl chloride resin may be a homopolymer obtained by polymerizing a vinyl chloride monomer alone, or a copolymer obtained by polymerizing a vinyl chloride monomer with a monomer other than the vinyl chloride monomer. Examples of copolymers of a vinyl chloride monomer with a monomer other than the vinyl chloride monomer include vinyl chloride-vinyl acetate copolymer, vinyl chloride-ethylene copolymer, vinyl chloride-propylene copolymer, vinyl chloride-styrene copolymer, vinyl chloride-isobutylene copolymer, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-styrene-maleic anhydride copolymer, vinyl chloride-styrene-acrylonitrile copolymer, vinyl chloride-butadiene copolymer, vinyl chloride-isoprene copolymer, vinyl chloride-chlorinated propylene copolymer, vinyl chloride-vinylidene chloride-vinyl acetate copolymer, vinyl chloride-maleic acid ester copolymer, vinyl chloride-methacrylic acid ester copolymer, vinyl chloride-acrylonitrile copolymer, and vinyl chloride-various vinyl ether copolymers. These vinyl chloride resins may be used alone or in combination of two or more. Furthermore, modified vinyl chloride resins may also be used. The modified vinyl chloride resin may be chlorinated polyvinyl chloride, etc. The polymerization method for the vinyl chloride resin is not particularly limited and may be bulk polymerization, solution polymerization, suspension polymerization, emulsion polymerization, or the like.

[0013] The average degree of polymerization (weight-average degree of polymerization) of the vinyl chloride resin is not particularly limited, but is preferably 500 to 5000, more preferably 1000 to 3000, and even more preferably 1300 to 2000. Having an average degree of polymerization of 500 or more can suppress a decrease in the abrasion resistance of the resulting vinyl chloride resin composition. Furthermore, having an average degree of polymerization of 5000 or less can suppress an increase in melt viscosity during extrusion molding of the vinyl chloride resin composition, thereby preventing deterioration of kneading and molding processability. In the vinyl chloride resin composition of this embodiment, one or more vinyl chloride resins having the above polymerization degrees may be used in combination. The average degree of polymerization can be determined according to Japanese Industrial Standard JIS K 6720-2:1999 (Plastics - Vinyl chloride homopolymer and copolymer (PVC) - Part 2: Preparation of test specimens and determination of properties).

[0014] (barium sulfate) The vinyl chloride resin composition contains barium sulfate to prevent deterioration of thermal stability and releasability. Barium sulfate has the characteristics of excellent thermal stability, ability to impart releasability, and resistance to acids and alkalis.

[0015] (talc) The vinyl chloride resin composition contains talc to prevent deterioration of thermal stability and release properties. The chemical name of talc is magnesium silicate hydrate (Mg3SiO 10 Talc has excellent thermal stability and sliding properties, and functions as an inorganic filler, and is often used as a filler to ensure the mechanical strength of molded products.

[0016] By containing talc and plate-like barium sulfate, the vinyl chloride resin composition has the talc inserted between the plate-like barium sulfate particles, improving sliding properties and enabling effective releasability to be obtained even with a small amount of talc. The vinyl chloride resin composition has a total content of barium sulfate and talc of 3 parts by mass or more and 30 parts by mass or less per 100 parts by mass of vinyl chloride resin. By having a total content of barium sulfate and talc of 3 parts by mass or more, it is possible to suppress deterioration in thermal stability and releasability. Furthermore, by having a total content of barium sulfate and talc of 30 parts by mass or less, it is possible to reduce adverse effects on electrical conductivity.

[0017] The ratio of the talc content to the barium sulfate content is 1 or more and 2 or less. When the ratio of the talc content to the barium sulfate content is 1 or more, it is possible to suppress deterioration in thermal stability and releasability. Furthermore, when the ratio of the talc content to the barium sulfate content is 2 or less, it is possible to suppress adverse effects on electrical conductivity.

[0018] (stabilizer) The vinyl chloride resin composition contains a stabilizer having a melting point of 75°C or higher. By using a stabilizer having a melting point of 75°C or higher and not using a stabilizer that is liquid at room temperature (25°C), odor can be reduced and thermal stability can be improved. The stabilizer suppresses the generation of hydrogen chloride when the vinyl chloride resin composition is heated and stabilizes the properties of the vinyl chloride resin. A lead-free stabilizer is preferably used. Examples of the lead-free stabilizer include at least one stabilizer selected from the group consisting of Ca-Mg-Zn stabilizers, Ca-Zn stabilizers, Zn-Mg stabilizers, Sn-based stabilizers, Ba-based stabilizers, Zn-based stabilizers, and Ca-based stabilizers. Of these, Ca-Mg-Zn stabilizers, Ca-Zn stabilizers, and Zn-Mg-based stabilizers are more preferred due to their excellent heat resistance and thermal stability. Furthermore, from the viewpoint of the releasability of the vinyl chloride sheet, the lead-free stabilizer preferably includes a metal stearate such as zinc stearate or calcium stearate.

[0019] The stabilizer content is 3 parts by mass or more and 15 parts by mass or less per 100 parts by mass of vinyl chloride resin. By having the stabilizer content of 3 parts by mass or more, thermal stability can be improved. Furthermore, by having the stabilizer content of 15 parts by mass or less, adverse effects on conductivity can be suppressed.

[0020] (plasticizer) The vinyl chloride resin composition preferably contains a plasticizer to adjust the hardness of the vinyl chloride sheet containing it. Known plasticizers can be used. The plasticizer is preferably at least one selected from the group consisting of aliphatic dibasic acid plasticizers, epoxy plasticizers, phthalic acid plasticizers, adipic acid plasticizers, trimellitic acid plasticizers, pyromellitic acid ester plasticizers, phosphate ester plasticizers, and ether ester plasticizers, and more preferably contains at least one of a phthalic acid plasticizer and an adipic acid plasticizer.

[0021] The phthalate plasticizer may be at least one phthalate ester selected from the group consisting of di-2-ethylhexyl phthalate (DEHP), di-n-octyl phthalate (DNOP), diisononyl phthalate (DINP), dinonyl phthalate (DNP), diisodecyl phthalate (DIDP), and ditridecyl phthalate.

[0022] The adipic acid plasticizer may be, for example, at least one adipic acid ester selected from the group consisting of bis(2-ethylhexyl) adipate (DOA), diisononyl adipate (DINA), and diisodecyl adipate (DIDA).

[0023] The trimellitic acid-based plasticizer may be, for example, at least one trimellitic acid ester selected from the group consisting of trioctyl trimellitate (TOTM) and triisodecyl trimellitate.

[0024] The vinyl chloride resin composition preferably contains 40 to 90 parts by mass of a plasticizer per 100 parts by mass of vinyl chloride resin. By including 40 parts by mass or more of the plasticizer, the hardness of the vinyl chloride sheet can be prevented from becoming too high. Furthermore, by including 90 parts by mass or less of the plasticizer, the releasability of the vinyl chloride sheet can be prevented from being adversely affected.

[0025] In order to impart electrical conductivity to the vinyl chloride resin composition, the plasticizer preferably contains diisononyl phthalate and an antistatic plasticizer. The antistatic plasticizer may contain at least one of a phthalic acid plasticizer other than diisononyl phthalate and an adipic acid plasticizer. The ratio of the content of the antistatic plasticizer to the content of diisononyl phthalate is preferably 3 to 9. By setting the ratio of the content of the antistatic plasticizer to the content of diisononyl phthalate within this range, it is possible to prevent adverse effects on thermal stability while effectively imparting electrical conductivity.

[0026] (filler) In order to increase the strength of the vinyl chloride sheet containing the vinyl chloride resin composition, known fillers other than the talc may be used. The filler may be at least one selected from inorganic fillers such as calcium carbonate, kaolin clay, synthetic silicic acid, quartz powder, calcium sulfate, calcium sulfite, calcium hydroxide, magnesium carbonate, aluminum hydroxide, titanium oxide, asbestos, silica, glass fiber, and mineral fiber; and organic fillers such as wood flour, coconut shell flour, pulp powder, crosslinked polyester particles, polystyrene particles, carbon fiber, and natural fiber. From the viewpoints of good compatibility with vinyl chloride resin and excellent thermal stability and dimensional stability, calcium carbonate is preferred as the filler.

[0027] The vinyl chloride resin composition preferably contains 15 to 150 parts by mass of a filler other than talc per 100 parts by mass of vinyl chloride resin. By including a filler content of 15 parts by mass or more, it is possible to suppress a decrease in thermal stability. Furthermore, by including a filler content of 150 parts by mass or less, it is possible to suppress adverse effects on releasability and electrical conductivity.

[0028] Furthermore, it is more preferable that the ratio of the content of the filler other than talc to the total content of the barium sulfate and talc is 4 or more and 5 or less. By setting the ratio of the content of the filler other than talc to the total content of the barium sulfate and talc within this range, it is possible to make it less likely that adverse effects will occur on releasability and conductivity.

[0029] (Other additives) In addition to the above-mentioned barium sulfate, talc, stabilizers, plasticizers, and fillers, additives include flame retardants, crosslinking agents, crosslinking aids, antioxidants, processing aids, metal deactivators, reinforcing agents, ultraviolet absorbers, lubricants, pigments, dyes, colorants, antistatic agents, and foaming agents.

[0030] The vinyl chloride resin composition may contain a flame retardant to improve flame retardancy. The flame retardant may be, for example, at least one of an organic flame retardant and an inorganic flame retardant. Examples of the organic flame retardant include halogen-based flame retardants such as bromine-based flame retardants and chlorine-based flame retardants, and phosphorus-based flame retardants such as phosphate esters, condensed phosphate esters, cyclic phosphorus compounds, and red phosphorus. Examples of the inorganic flame retardant include at least one metal hydroxide selected from the group consisting of aluminum hydroxide, magnesium hydroxide, and calcium hydroxide. These flame retardants may be used alone or in combination. The flame retardant may include, for example, an organic flame retardant and an inorganic flame retardant.

[0031] The organic flame retardant preferably contains at least a halogen-based flame retardant. The halogen-based flame retardant can capture hydroxyl radicals that promote combustion of the vinyl chloride resin composition and suppress the combustion of the vinyl chloride resin composition. The halogen-based flame retardant may be, for example, a compound in which at least one halogen is substituted on an organic compound. Examples of the halogen-based flame retardant include a fluorine-based flame retardant, a chlorine-based flame retardant, a bromine-based flame retardant, and an iodine-based flame retardant. The halogen-based flame retardant is preferably a bromine-based flame retardant.

[0032] Brominated flame retardants include, for example, 1,2-bis(bromophenyl)ethane, 1,2-bis(pentabromophenyl)ethane, hexabromobenzene, ethylene bis-dibromonorbornanedicarboximide, ethylene bis-tetrabromophthalimide, tetrabromobisphenol S, tris(2,3-dibromopropyl-1)isocyanurate, hexabromocyclododecane (HBCD), octabromophenyl ether, tetrabromobisphenol A (TBA), TBA epoxy oligomer or polymer, TBA-bis(2,3-dibromopropyl ether), decabromodiphenyl oxide, polydibromophenylene oxide, bis(tribromophenoxy)ethane, ethylene bis-pentabromobenzene, dibromophenyl ether, tetrabromobisphenol A (TBA), octabromophenyl ether, tetra ... Examples of suitable flame retardants include 1,2-bis(pentabromophenyl)ethane and tetrabromobisphenol A. Examples of suitable flame retardants include 1,2-bis(pentabromophenyl)ethane and tetrabromobisphenol A. Examples of suitable flame retardants include 1,2-bis(pentabromophenyl)ethane and tetrabromobisphenol A.

[0033] The inorganic flame retardant preferably contains at least a metal hydroxide. Metal hydroxides are widely used as flame retardants and are relatively less expensive than bromine-based flame retardants. Examples of metal hydroxides that can be used include one or more metal compounds having hydroxyl groups or crystal water, such as magnesium hydroxide (Mg(OH)), aluminum hydroxide (Al(OH)), calcium hydroxide (Ca(OH)), basic magnesium carbonate (mMgCO·Mg(OH)·nH2O), hydrated aluminum silicate (aluminum silicate hydrate, Al2O3·3SiO2·nH2O), and hydrated magnesium silicate (magnesium silicate pentahydrate, Mg2SiO8·5H2O). Among these, magnesium hydroxide is particularly preferred as the metal hydroxide.

[0034] Examples of antioxidants include phenol-based antioxidants, phosphorus-based antioxidants, and sulfur-based antioxidants. To impart sufficient heat resistance to the vinyl chloride resin composition as an antioxidant, a radical-scavenging antioxidant such as a hindered phenol and a peroxide-decomposing antioxidant such as a thioether may be combined. The content of the antioxidant is preferably 2 to 5 parts by mass per 100 parts by mass of vinyl chloride resin. By including an antioxidant in an amount of 2 parts by mass or more, sufficient heat resistance life can be achieved. Furthermore, by including an antioxidant in an amount of 5 parts by mass or less, bleeding of the antioxidant onto the surface of the vinyl chloride sheet can be prevented, thereby preventing adverse effects on workability during vinyl chloride sheet molding.

[0035] The vinyl chloride resin composition of the present embodiment can suppress a decrease in electrical conductivity. The electrical conductivity of the vinyl chloride resin composition is such that the volume resistivity is 2.5×10 4 Ω or more 1.0×10 7 Ω or less is preferable, and 2.5×10 4 Ω or more 9.5×10 6It is more preferable that the volume resistivity is Ω or less. When the volume resistivity of the vinyl chloride resin composition is in this range, the vinyl chloride sheet can have sufficient conductivity. The volume resistivity can be measured in accordance with JIS K 6723 (soft polyvinyl chloride compound).

[0036] The vinyl chloride resin composition of this embodiment can suppress a decrease in thermal stability. Thermal stability can be evaluated by a Congo Red thermal stability test in accordance with JIS K 6723. Specifically, this test measures how many minutes it takes for hydrogen chloride gas to be generated from a heated sample when the sample is heated to 180°C. The result of the thermal stability test is preferably 50 minutes or more, and more preferably 60 minutes or more. When the result of the thermal stability test of the vinyl chloride resin composition is 50 minutes or more, the vinyl chloride sheet can have sufficient thermal stability.

[0037] The vinyl chloride resin composition of the present embodiment can suppress a decrease in releasability. Releasability refers to the ease with which the composition is peeled from a roll when it is formed into a vinyl chloride sheet, and can be evaluated, for example, by the ease with which a test sample of the vinyl chloride sheet is peeled from the roll surface at 160°C.

[0038] The vinyl chloride resin composition of this embodiment has good dent resistance when molded into a vinyl chloride sheet. "Dent resistance" refers to the ease with which the vinyl chloride sheet absorbs impact, and can be evaluated, for example, by a dent test and a residual dent test in accordance with JIS A 1454 (Test Methods for Polymer-Based Flooring Materials). The dent depth in the dent test is preferably 0.6 mm or more, and more preferably 0.8 mm or more, at 23°C. Furthermore, the dent depth in the dent test is preferably 1.3 mm or less, and more preferably 1.2 mm or less, at 45°C. Furthermore, the residual dent depth in the residual dent test is preferably 0.3 mm or less, and more preferably 0.25 mm. When the dent depth and residual dent depth of the vinyl chloride resin composition are within these ranges, the vinyl chloride sheet can have sufficient dent resistance.

[0039] The vinyl chloride resin composition is prepared by melt-kneading the above-mentioned vinyl chloride resin, barium sulfate, talc, stabilizer, plasticizer, filler, etc., and any known method can be used for this purpose. For example, the vinyl chloride resin composition can be obtained by pre-blending the components in advance using a high-speed mixer such as a Henschel mixer, and then kneading the components using a known kneader such as a Banbury mixer, kneader, or roll mill.

[0040] As described above, the vinyl chloride resin composition contains vinyl chloride resin, barium sulfate, talc, and a stabilizer having a melting point of 75°C or higher. The total content of the barium sulfate and talc is 3 to 30 parts by mass, and the content of the stabilizer is 3 to 15 parts by mass, per 100 parts by mass of vinyl chloride resin. Furthermore, the ratio of the talc content to the barium sulfate content is 1 to 2. Therefore, a vinyl chloride resin composition can be provided that is low in odor and suppresses deterioration in electrical conductivity, thermal stability, and releasability.

[0041] The vinyl chloride sheet of this embodiment contains the vinyl chloride resin composition described above. The method for forming the vinyl chloride resin sheet is not particularly limited, but it can be formed, for example, by a method in which a molten vinyl chloride resin composition is extruded through a T-die and stretched to form a sheet. The sheet-like extrudate may be cooled with a cooling roll or the like as necessary before being taken up. By forming in this manner, it is possible to provide a vinyl chloride sheet that is low in odor and inhibits deterioration in electrical conductivity, thermal stability, and releasability. [Example]

[0042] Hereinafter, the present embodiment will be described in more detail with reference to examples and comparative examples, but the present embodiment is not limited to these examples.

[0043] (Preparation of test samples) Vinyl chloride resin compositions were prepared according to the formulations (unit: parts by mass) shown in Tables 1 to 7. Specifically, vinyl chloride resin and other additives were blended and melt-kneaded using a twin-screw kneading extruder at a temperature of 200°C. The extruded strands were water-cooled and passed through a pelletizer to obtain pellets. The obtained vinyl chloride resin pellets were used in a T-die film molding machine to produce a substrate having a thickness of 90 μm at a temperature of 200°C. In this manner, test samples for evaluation as vinyl chloride sheets were prepared.

[0044] (Vinyl chloride resin) Shin-Etsu Chemical Co., Ltd. Product name: TK-1100 (average degree of polymerization: 1100)

[0045] (antistatic plasticizer) ADEKA Corporation LV-848 (phthalic acid butoxyester)

[0046] (plasticizer) DINP (Diisononyl phthalate) manufactured by J-Plus Corporation

[0047] (stabilizer) Sakai Chemical Industry Co., Ltd. OW-5200 (Ca-Zn stabilizer, metal stearate) Kyoward (registered trademark) 500 (hydrotalcite) manufactured by Kyowa Chemical Industry Co., Ltd.

[0048] (talc) TT Talc manufactured by Takehara Chemical Industry Co., Ltd.

[0049] (barium sulfate) Sakai Chemical Industry Co., Ltd. B-30

[0050] (filler) Softon 1500 (calcium carbonate) manufactured by Bihoku Funka Kogyo Co., Ltd.

[0051] (lubricant) Mitsubishi Chemical Corporation P-530A (acrylic processing aid)

[0052] [evaluation] <Volume resistivity> The volume resistivity of the vinyl chloride resin composition was measured in accordance with JIS K 6723.

[0053] <Thermal stability> The thermal stability was evaluated by the Congo Red thermal stability test in accordance with JIS K 6723.

[0054] <Dent amount and remaining dent amount> The amount of dents and the amount of residual dents were evaluated by a dent test and a residual dent test in accordance with JIS A 1454.

[0055] <Odor> Odor is evaluated by an odor test. Specifically, 600g of a test sample of vinyl chloride sheet was placed in a 1L beaker and heated at 50°C for 48 hours, after which the odor was evaluated by sensory evaluation on a 5-point scale. The evaluation criteria were as follows: "1" (pass) for a barely detectable odor, "2" (pass) for a weak odor that was easy to identify, "3" (fail) for an easily detectable odor, "4" (fail) for a strong odor that was slightly unpleasant, and "5" (fail) for a very strong odor that was very unpleasant.

[0056] <Removability> The peelability when molded into a vinyl chloride sheet was evaluated. Peelability was evaluated by the ease with which a 0.6 mm thick vinyl chloride sheet test sample was peeled from the roll surface at 160°C. The evaluation criteria were "○" (pass) if the sample peeled when pulled at the same speed as the rotation of the roll, "△" (fail) if the sample peeled when pulled at a speed faster than the rotation of the roll, and "×" (fail) if the sample did not peel even when pulled.

[0057] [Evaluation results] The results of evaluation by the above-mentioned evaluation methods are shown in Tables 1 to 7.

[0058] [Table 1]

[0059] [Table 2]

[0060] [Table 3]

[0061] [Table 4]

[0062] [Table 5]

[0063] [Table 6]

[0064] [Table 7]

[0065] As shown in Tables 1 and 2, the test samples of Examples 1 to 32 had a volume resistivity of 2.5 × 10 4 Ω or more 1.0×10 7 The resistance was in the range of Ω or less, and the thermal stability test results were 50 minutes or more. Furthermore, the test samples of Examples 1 to 32 had a dent depth of 0.6 mm or more at 23°C, and a dent depth of 1.3 mm or less at 45°C, and a residual dent depth of 0.3 mm or less. Furthermore, the test samples of Examples 1 to 32 passed the evaluations for both odor and releasability. Therefore, the vinyl chloride resin compositions prepared in Examples 1 to 32 had a low odor and were able to suppress deterioration in conductivity, thermal stability, and releasability.

[0066] On the other hand, as shown in Table 3, the test samples of Comparative Examples 1 to 8 failed the evaluation of peelability because the total content of barium sulfate and talc was less than 3 parts by mass and the content of calcium carbonate was less than 15 parts by mass per 100 parts by mass of vinyl chloride resin.

[0067] As shown in Tables 3 and 4, the test samples of Comparative Examples 9 to 18, 20, and 21 had a ratio of the mass of talc to the mass of barium sulfate greater than 2. Furthermore, the test samples of Comparative Examples 18, 19, 21, and 22 had a total content of barium sulfate and talc greater than 30 parts by mass and a content of calcium carbonate greater than 150 parts by mass per 100 parts by mass of vinyl chloride resin. Therefore, the test samples of Comparative Examples 9 to 22 had a volume resistivity of 1.0 × 10 7 It is larger than Ω.

[0068] As shown in Table 4, the test samples of Comparative Examples 23, 25, 27, and 29 contained less than 3 parts by mass of stabilizer relative to 100 parts by mass of vinyl chloride resin, and therefore the thermal stability test results were less than 50 minutes. The test sample of Comparative Example 23 failed the odor evaluation. The test samples of Comparative Examples 24, 26, 28, and 30 contained more than 15 parts by mass of stabilizer relative to 100 parts by mass of vinyl chloride resin, and therefore the volume resistivity was less than 1.0 × 10 7 It is larger than Ω.

[0069] As shown in Table 5, the test samples of Comparative Examples 31 and 32 used hydrotalcite instead of the Ca-Zn stabilizer, and therefore the results of the thermal stability test were less than 50 minutes.

[0070] As shown in Table 6, the test samples of Comparative Examples 33 to 48 had a plasticizer content of less than 40 parts by mass relative to 100 parts by mass of vinyl chloride resin, and therefore had a volume resistivity of 1.0 × 10 7 Furthermore, because the content of the plasticizer was low as described above, the hardness of the vinyl chloride sheets of Comparative Examples 33 to 48 was too high, and therefore the dent depth was less than 0.6 mm at 23°C, or the residual dent depth was greater than 0.3 mm.

[0071] As shown in Table 7, the test samples of Comparative Examples 49 to 64 had a plasticizer content of more than 90 parts by mass relative to 100 parts by mass of vinyl chloride resin, and therefore failed the evaluation of releasability.

[0072] These results demonstrate that by blending specific components and a specific composition of a vinyl chloride resin composition, it is possible to obtain a vinyl chloride resin composition and a vinyl chloride sheet containing the same that are low in odor and that suppress deterioration in electrical conductivity, thermal stability, and peelability.

[0073] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment.

Claims

1. Contains vinyl chloride resin, barium sulfate, talc, and a stabilizer having a melting point of 75°C or higher, The total content of the barium sulfate and the talc is 3 parts by mass or more and 30 parts by mass or less, and the content of the stabilizer is 3 parts by mass or more and 15 parts by mass or less, relative to 100 parts by mass of the vinyl chloride resin; A vinyl chloride resin composition, wherein the ratio of the content of the talc to the content of the barium sulfate is 1 or more and 2 or less.

2. 2. The vinyl chloride resin composition according to claim 1, further comprising 15 parts by mass or more and 150 parts by mass or less of a filler other than talc relative to 100 parts by mass of the vinyl chloride resin.

3. 3. The vinyl chloride resin composition according to claim 2, wherein the filler other than talc is calcium carbonate.

4. 3. The vinyl chloride resin composition according to claim 1, further comprising a plasticizer comprising at least one of a phthalic acid-based plasticizer and an adipic acid-based plasticizer.

5. A vinyl chloride sheet comprising the vinyl chloride resin composition according to claim 1 or 2.

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