JP7006248B2 - Inorganic mineral-containing resin composition and inorganic mineral-containing resin sheet - Google Patents

Description

The present invention relates to an inorganic mineral-containing resin composition and an inorganic mineral-containing resin sheet.

As the inorganic mineral-containing resin sheet, for example, Patent Document 1 describes an inorganic mineral-containing resin sheet containing 56 to 80% by mass of calcium carbonate powder, 43 to 18% by mass of polyethylene resin, and 1 to 2% by mass of additives. Has been done.

Japanese Unexamined Patent Publication No. 11-277623

However, the inorganic mineral-containing resin sheet has a problem of low rigidity as compared with paper produced from general pulp.

An object of the present invention is to provide an inorganic mineral-containing resin composition capable of providing a highly rigid inorganic mineral-containing resin sheet.

The present invention includes the inventions described in the following [1] to [7].
[1] An inorganic mineral-containing resin composition containing the following component (A) and a resin.
A total of 100 parts by mass of the component (A) and the resin contains 60 to 90 parts by mass of the component (A) and 10 to 40 parts by mass of the resin.
The resin contains the following component (B) and the following component (C).
Inorganic containing more than 50% by mass of the following component (B) and 97% by mass or less and 3% by mass or more and less than 50% by mass of the following component (C) with respect to a total of 100% by mass of the component (B) and the component (C). Mineral-containing resin composition.
Component (A): Inorganic mineral powder Component (B): Polyethylene component (C): Polymer other than component (B) and having a Vicat softening point of 80 ° C. or higher and 130 ° C. or lower [2] The component (C) is polypropylene. The polymer according to [1], wherein at least one Vicat softening point selected from the group consisting of styrene resin, halogenated resin, acrylic resin, maleic anhydride-modified polyethylene, ionomer resin and polyamide is 80 ° C. or higher and 130 ° C. or lower. Inorganic mineral-containing resin composition.
[3] The inorganic mineral-containing resin composition according to [1] or [2], wherein the component (C) has a Vicat softening point of 90 ° C. or higher and 120 ° C. or lower.
[4] The inorganic mineral-containing resin composition according to any one of [1] to [3], further comprising the following component (D).
Component (D): Oxygen-containing organic compound (excluding component (C))
[5] The inorganic mineral-containing resin composition according to [4], which contains 0.01 to 10 parts by mass or less of the component (D) with respect to 100 parts by mass of the total of the component (A) and the resin.
[6] The component (D) is a fatty acid, an aliphatic amide, an aliphatic ester metal soap, an alcohol, a nonionic surfactant, an epoxy group-containing resin having a Vicat softening point of less than 80 ° C., and an anhydride having a Vicat softening point of less than 80 ° C. The inorganic mineral according to [4] or [5], which is at least one selected from maleic anhydride-modified polyethylene, maleic anhydride-modified polyethylene having a bicut softening point of more than 130 ° C., and an ionomer resin having a bicat softening point of more than 130 ° C. Containing resin composition.
[7] An inorganic mineral-containing resin sheet containing the inorganic mineral-containing resin composition according to any one of [1] to [6].

According to the present invention, it is possible to provide an inorganic mineral-containing resin composition capable of providing a highly rigid inorganic mineral-containing resin sheet.

In the present specification, the density is measured according to the method A specified in JIS K7112-1980 after performing the annealing described in JIS K6760-1980.
In the present specification, the melt flow rate (hereinafter referred to as MFR) is measured by the method A specified in JIS K7210-1995 under the conditions of a temperature of 190 ° C. and a load of 21.18 N.

[Inorganic mineral-containing resin composition]
The inorganic mineral-containing resin composition of the present invention contains an inorganic mineral powder (hereinafter, may be referred to as a component (A)) and a resin, and is a component with respect to a total of 100 parts by mass of the component (A) and the resin. (A) contains 60 to 90 parts by mass and 10 to 40 parts by mass of the resin, preferably 65 to 85 parts by mass of the component (A) and 15 to 35 parts by mass of the resin, and 70 to 80 parts by mass of the component (A) and It preferably contains 20 to 30 parts by mass of the resin.

[Ingredient (A)]
The component (A) contained in the inorganic mineral-containing resin composition of the present invention is at least one selected from the group consisting of metal carbonates, metal oxides, metal silicates, metal hydroxides, metal sulfates and the like. Examples include powders of inorganic minerals. Examples of the metal carbonate include calcium carbonate, potassium carbonate, sodium carbonate and iron carbonate. Examples of the metal oxide include magnesium oxide, zinc oxide, titanium oxide, silica, diatomaceous earth, and glass fiber. Examples of the metal silicate include clay, kaolin and talc. Examples of the metal hydroxide include aluminum hydroxide, calcium hydroxide, magnesium hydroxide, and iron hydroxide. Examples of the metal sulfate include calcium sulfate and barium sulfate. From the viewpoint of enhancing the heat resistance, moisture resistance, or whiteness of the inorganic mineral-containing resin sheet containing the inorganic mineral-containing resin composition, it is preferable to use at least one inorganic mineral selected from the group consisting of calcium carbonate and titanium oxide. ..

The average particle size of the component (A) is preferably 0.001 μm or more and 50 μm or less, preferably 0.01 μm or more, from the viewpoint that the component (A) can be more uniformly dispersed in the inorganic mineral-containing resin composition. It is more preferably 40 μm or less.

In the present specification, the average particle size of the component (A) is a medium diameter calculated by the following method. By irradiating the dispersion liquid in which the component (A) is dispersed in ethanol with a laser beam, the intensity distribution of the diffracted scattered light can be obtained. The volume-based particle size distribution is obtained from the obtained intensity distribution, and the median diameter (50% diameter) in the integrated fraction of the particle size distribution is calculated.

[resin]
The resin contained in the inorganic mineral-containing resin composition of the present invention is other than polyethylene (hereinafter, may be referred to as component (B)) and component (B), and has a Vicat softening point of 80 ° C. or higher and 130 ° C. or lower. It contains a polymer (hereinafter, may be referred to as a component (C)). With respect to the total 100% by mass of the component (B) and the component (C), the component (B) is more than 50% by mass and 97% by mass or less, and the component (C) is 3% by mass or more and less than 50% by mass. B) 55 to 95% by mass, preferably 5 to 45% by mass of the component (C), 70 to 90% by mass of the component (B), and 10 to 30% by mass of the component (C). More preferred.

<Ingredient (B)>
The component (B) is at least one selected from high-density polyethylene, ethylene-α-olefin copolymer and high-pressure polyethylene.

The high-density polyethylene is preferably polyethylene having a density of 945 kg / m ³ to 970 kg / m ³ and 945 kg / m ³ to 965 kg / m ³ . The MFR of the high density polyethylene is 0.01 g / 10 min to 50 g / 10 min, preferably 0.02 g / 10 min to 10 g / 10 min, and 0.3 g / 10 min to 8 g / 10 min. It is more preferable to have.

The ethylene-α-olefin copolymer is a copolymer containing a monomer unit derived from ethylene and a monomer unit derived from an α-olefin having 3 or more and 20 or less carbon atoms. The content of the ethylene-based monomer unit in the ethylene-α-olefin copolymer is 50% by weight or more with respect to 100% by weight of the ethylene-α-olefin copolymer. The content of the monomer unit derived from the α-olefin having 3 or more and 20 or less carbon atoms is usually 50% by weight or less with respect to 100% by weight of the ethylene-α-olefin copolymer.
Examples of the α-olefin having 3 or more and 20 or less carbon atoms include propylene, 1-butene, 1-pentene, 1-hexene, 1-hexene, 1-octene, 1-nonene, 1-decene, 1-dodecene, and the like. Examples thereof include 4-methyl-1-pentene and 4-methyl-1-hexene. The ethylene-α-olefin copolymer may contain only one kind of these α-olefins, or may contain two or more kinds of them. The α-olefin having 3 or more carbon atoms and 20 or less carbon atoms is preferably 1-butene, 1-hexene, 4-methyl-1-pentene, or 1-octene.

The upper limit of the density of the ethylene-α-olefin copolymer is 945 kg / m ³ , preferably 940 kg / m ³ , and more preferably 930 kg / m ³ . The lower limit of the density is 860 kg / m ³ , preferably 880 kg / m ³ , and more preferably 900 kg / m ³ . The density of the ethylene-α-olefin copolymer is preferably 860 kg / m ³ to 945 kg / m ³ , preferably 880 kg / m ³ to 940 kg / m ³ , and 900 kg / m ³ to 930 kg / m 3. It is more preferably ^m3 . The density of the ethylene-α-olefin copolymer can be controlled by adjusting the content of the monomer unit derived from ethylene in the ethylene-α-olefin copolymer.

Examples of the ethylene-α-olefin copolymer include ethylene-1-butene copolymer, ethylene-1-hexene copolymer, ethylene-4-methyl-1-pentene copolymer, and ethylene-1-octene. Ethylene, ethylene-1-butene-1-hexene copolymer, ethylene-1-butene-4-methyl-1-pentene copolymer, ethylene-1-butene-1-octene copolymer, ethylene-1 -Hexen-1-octene copolymers include ethylene-1-butene copolymers, ethylene-1-hexene copolymers, ethylene-4-methyl-1-pentene copolymers, ethylene-1-butene-. It is preferably a 1-hexene copolymer, an ethylene-1-butene-1-octene copolymer, or an ethylene-1-hexene-1-octene copolymer.

The MFR of the ethylene-α-olefin copolymer is 0.01 g / 10 min to 50 g / 10 min, preferably 0.02 g / 10 min to 10 g / 10 min, and 0.3 g / 10 min to. More preferably, it is 8 g / 10 minutes. The MFR of the ethylene-α-olefin copolymer can be controlled, for example, by adjusting the hydrogen concentration and the polymerization temperature during the polymerization of the ethylene-α-olefin copolymer, and the hydrogen concentration and the polymerization temperature are increased. Then, the value of MFR of the ethylene-α-olefin copolymer becomes large.

High-pressure polyethylene is an ethylene homopolymer obtained by polymerizing ethylene by the high-pressure method. For example, using a tank-type reactor or a tube-type reactor, the polymerization pressure is 140 MPa or more and 300 MPa in the presence of a radical generator. Hereinafter, it is produced by polymerizing ethylene under the conditions of a polymerization temperature of 200 ° C. or higher and 300 ° C. or lower.
The lower limit of the density of the ethylene homopolymer is preferably 920 kg / m ³ , more preferably 925 kg / m ³ , further preferably 928 kg / m ³ , and the density of the ethylene homopolymer. The upper limit is preferably 935 kg / m ³ , more preferably 933 kg / m ³ , and even more preferably 930 kg / m ³ . The density of the ethylene homopolymer is preferably 920 kg / m ³ to 935 kg / m ³ , more preferably 925 kg / m ³ to 933 kg / m ³ , and more preferably 928 kg / m ³ to 930 kg / m ³ . Is even more preferable.

<Component (C)>
The Vicat softening point of the component (C) is preferably 90 ° C. or higher and 120 ° C. or lower, and more preferably 95 ° C. or higher and 115 ° C. or lower. The value of the Vicat softening point of the component (C) is obtained by measuring a sheet having a thickness of about 5 mm obtained by hot-pressing the component (C) according to the A50 method specified in JIS K7206-1999.

The component (C) is preferably at least one selected from the group consisting of polypropylene, styrene resin, halogenated resin, acrylic resin, maleic anhydride-modified polyethylene, ionomer resin and polyamide, and is preferably selected from polypropylene and styrene resin. It is more preferable that it is at least one kind.

Polypropylene is a propylene homopolymer or a propylene-based random copolymer. The propylene homopolymer is a polymer obtained by polymerizing a monomer composed of only propylene. The propylene-based random copolymer is a random copolymer obtained by copolymerizing propylene with ethylene and / or at least one comonomer selected from α-olefins having 4 to 20 carbon atoms. The content of the ethylene-based monomer unit in the propylene-based random copolymer is 3% by weight or more, less than 50% by weight, and 5 to 45% by weight with respect to 100% by weight of the propylene-based random copolymer. It is preferably by weight%, more preferably 10 to 30% by weight.

Examples of α-olefins having 4 to 20 carbon atoms include 1-butene, 2-methyl-1-propene, 1-pentene, 2-methyl-1-butene, 3-methyl-1-butene, and 1-hexene. , 2-Ethyl-1-butene, 2,3-dimethyl-1-butene, 2-methyl-1-pentene, 3-methyl-1-pentene, 4-methyl-1-pentene, 3,3-dimethyl-1 -Buten, 1-hexene, methyl-1-hexene, dimethyl-1-pentene, ethyl-1-pentene, trimethyl-1-butene, methylethyl-1-butene, 1-octene, methyl-1-pentene, ethyl- 1-hexene, dimethyl-1-hexene, propyl-1-heptene, methylethyl-1-heptene, trimethyl-1-pentene, propyl-1-pentene, diethyl-1-butene, 1-nonen, 1-decene, 1 -Undecene and 1-dodecene are mentioned, preferably 1-butene, 1-pentene, 1-hexene and 1-octene, and more preferably 1-butene and 1-hexene.

Examples of the propylene-based random copolymer include a propylene-ethylene random copolymer, a propylene-α-olefin random copolymer, and a propylene-ethylene-α-olefin random copolymer. Examples of the propylene-α-olefin random copolymer include a propylene-1-butene random copolymer and a propylene-1-hexene random copolymer. Examples of the propylene-ethylene-α-olefin random copolymer include a propylene-ethylene-1-butene random copolymer and a propylene-ethylene-1-hexene random copolymer. The propylene-based random copolymer is preferably a propylene-ethylene random copolymer, a propylene-1-butene random copolymer, or a propylene-ethylene-1-butene random copolymer.

Examples of the styrene-based resin include a styrene-based homopolymer, a styrene-based random copolymer, a styrene-based graft copolymer, and a styrene-based block copolymer.

Examples of the styrene-based homopolymer include polystyrene. Examples of the styrene-based random copolymer include a copolymer of styrene and at least one comonomer selected from vinyltoluene, (meth) acrylic monomer, and acrylonitrile. Styrene-based graft copolymers include, for example, polybutadiene, acrylic rubber, styrene-butadiene block copolymer, ethylene-propylene-diene rubber, ethylene-vinyl acetate copolymer, styrene and, if necessary, vinyl toluene, (meth). It is a graft copolymer grafted with an acrylic monomer and acrylonitrile. Examples of the styrene-based block copolymer include a styrene-butadiene-styrene block copolymer, a styrene-isoprene-styrene block copolymer, a hydrogenated styrene-butadiene-styrene block copolymer, and a hydrogenated styrene-isoprene-styrene. Examples include copolymers.

The halogenated resin is a homopolymer or a random copolymer of a halogenated monomer. Examples of the halogenated monomer include a vinyl halide monomer, a halogenated styrene monomer such as 4-bromostyrene; a halogenated (methyl) acrylic acid monomer such as trifluoroethyl acrylate; and a halogenated conjugated diene such as chloroprene. ..

The acrylic resin may be a homopolymer of (meth) acrylic acid ester such as polymethylmethacrylate (PMMA) or polymethylacrylate (PMA), or a monomer unit derived from methyl methacrylate (MMA) or methyl acrylate (MA). It is a copolymer of a derived monomer unit and a monomer unit derived from one or more other types of monomers, and may be a mixture of a plurality of types of these resins.
Other monomers copolymerizable with MMA and MA include, for example, alkyl (meth) acrylates having an alkyl group having 2 to 18 carbon atoms; α, β-unsaturated acids such as acrylic acid and methacrylic acid; Unsaturated group-containing divalent carboxylic acids such as maleic acid, fumaric acid, and itaconic acid and their alkyl esters; aromatic vinyl compounds such as styrene, α-methylstyrene, and nuclear-substituted styrene; cyanide of acrylonitrile, methacrylonitrile, etc. Vinyl compounds; maleic anhydride, maleimide, and N-substituted maleimide.

Polyamides are aliphatic polyamides and aromatic polyamides. Examples of the aliphatic polyamide include nylon 6, nylon 66, nylon 610, nylon 612, nylon 11, and nylon 12. Examples of the aromatic polyamide include polyhexamethylenediamine terephthalamide and polyhexamethylenediamine isophthalamide.

Maleic anhydride-modified polyethylene is a modified polyethylene obtained by graft-polymerizing maleic anhydride on polyethylene. Examples of the maleic anhydride-modified polyethylene include the Admer (registered trademark) series manufactured by Mitsui Chemicals, Inc. The Vicat softening point of maleic anhydride-modified polyethylene can be controlled by adjusting the density of the polyethylene used. For example, by increasing the density of polyethylene, the Vicat softening point can be increased.

The ionomer resin is a copolymer partially neutralized with metal ions, which contains a monomer unit derived from ethylene and a monomer unit derived from an unsaturated carboxylic acid. Examples of the metal ion include monovalent metal ions such as lithium, sodium, potassium and cesium, divalent metal ions such as magnesium, calcium, strontium, barium, copper and zinc, and trivalent metal ions such as aluminum and iron. Be done.
The ionomer resin may contain a monomer unit derived from a monomer other than the monomer unit derived from ethylene and the monomer unit derived from an unsaturated carboxylic acid. The Vicat softening point of the ionomer resin can be controlled by adjusting the content of the monomer unit derived from the unsaturated carboxylic acid. For example, by lowering the content of the monomer unit derived from ethylene in the ionomer resin, the Vicat softening point of the ionomer resin can be lowered.

Examples of the unsaturated carboxylic acid include an unsaturated carboxylic acid having 4 to 8 carbon atoms and a monovalent metal salt of the unsaturated carboxylic acid having 4 to 8 carbon atoms (for example, a lithium salt, a potassium salt, a sodium salt and the like). ) And salts of polyvalent metals of unsaturated carboxylic acids having 4 to 8 carbon atoms (eg, magnesium salts, calcium salts, zinc salts, etc.). Examples of unsaturated carboxylic acids having 4 to 8 carbon atoms include acrylic acid, methacrylic acid, etacrilic acid, itaconic acid, itaconic anhydride, fumaric acid, crotonic acid, maleic acid, maleic anhydride; monomethyl maleate, maleic anhydride. Maleic anhydride monoesters such as monoethyl acid: Maleic anhydride monoesters such as monomethyl maleic anhydride and monoethyl maleic anhydride can be mentioned.

[Component (D): Oxygen-containing organic compound (however, component (C) is excluded)]
Further, in order to increase the rigidity of the inorganic mineral-containing resin sheet, the inorganic mineral-containing resin composition preferably contains the component (D). It is preferable to contain 0.01 to 10 parts by mass or less of the component (D) with respect to 100 parts by mass of the total of the component (A) and the resin.
The content of the component (D) is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 5 parts by mass, based on 100 parts by mass of the total of the component (A) and the resin. It is preferably 1 to 3 parts by mass, and more preferably 1 to 3 parts by mass.
It is preferable that the total of the component (A), the resin and the component (D) is 95 to 100 parts by mass with respect to 100 parts by mass of the inorganic mineral-containing resin composition.

The component (D) is an organic compound having an oxygen atom, and may be a monomer or a polymer. The polymer of the component (D) is a polymer other than the component (C). The components (D) include fatty acids, aliphatic amides, aliphatic ester metal soaps, alcohols, nonionic surfactants, maleic anhydride-modified polyethylene having a Vicat softening point of less than 80 ° C., and anhydrous having a Vicat softening point of more than 130 ° C. Examples thereof include at least one organic compound selected from the group consisting of maleic anhydride-modified polyethylene, an ionomer resin having a Vicat softening point of less than 80 ° C., and an epoxy group-containing resin having a Vicat softening point of less than 80 ° C., and having a Vicat softening point of 80 ° C. It is preferably at least one organic compound selected from the group consisting of less than maleic anhydride-modified polyethylene, an ionomer resin having a Vicat softening point of less than 80 ° C., and an epoxy group-containing resin having a Vicat softening point of less than 80 ° C.

Examples of fatty acids include oleic acid, erucic acid, stearic acid, behenic acid, ethylene bisoleic acid, ethylene bisstearic acid, lauric acid, myristic acid, palmitic acid, isostearic acid, undecylenic acid, 12-hydroxystearic acid, and palmi. Examples thereof include tooleic acid, linoleic acid, linoleic acid, docosahexaenoic acid, eikosapentaenoic acid, isohexadecanoic acid, anteisohenicosanic acid, long-chain branched fatty acid, dimer acid, and hydrogenated dimer acid. Examples of the aliphatic ester metal soap include aluminum salts, calcium salts, magnesium salts, zinc salts, potassium salts and the like of the above-mentioned various fatty acids, and specific examples thereof include calcium stearate. Examples of the aliphatic amide include amides of the above-mentioned various fatty acids. The aliphatic ester metal soap is preferably an aliphatic ester calcium salt.

The alcohol preferably has 6 or more carbon atoms, and more preferably has a boiling point of 150 ° C. or higher. Examples of the alcohol include isostearyl alcohol, hexyldecanol, lauryl alcohol, myristyl alcohol, cetanol, stearyl alcohol, cetostearyl alcohol, oleyl alcohol, behenyl alcohol, and octyldodecanol.

Examples of the nonionic surfactant include ethers having a polyoxyethylene structure such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, ethylene oxide propylene oxide block copolymer, and ethylene oxide-propylene oxide copolymer. Can be mentioned.

Maleic anhydride-modified polyethylene is a polymer obtained by graft-polymerizing maleic anhydride on polyethylene. Examples of the maleic anhydride-modified polyethylene include the Admer (registered trademark) series manufactured by Mitsui Chemicals, Inc. The Vicat softening point of maleic anhydride-modified polyethylene can be controlled by adjusting the density of the polyethylene used. For example, by increasing the density of polyethylene, the Vicat softening point can be increased.
The ionomer resin is a copolymer partially neutralized with metal ions, which contains a monomer unit derived from ethylene and a monomer unit derived from an unsaturated carboxylic acid. Examples of the metal ion include monovalent metal ions such as lithium, sodium, potassium and cesium, divalent metal ions such as magnesium, calcium, strontium, barium, copper and zinc, and trivalent metal ions such as aluminum and iron. Be done.
The ionomer resin may contain a monomer unit derived from a monomer other than the monomer unit derived from ethylene and the monomer unit derived from unsaturated carboxylic acid. It can be controlled by adjusting the content of the monomer unit derived from the unsaturated carboxylic acid. For example, by lowering the content of the monomer unit derived from ethylene in the ionomer resin, the Vicat softening point of the ionomer resin can be lowered.

Examples of the unsaturated carboxylic acid include an unsaturated carboxylic acid having 4 to 8 carbon atoms and a monovalent metal salt of the unsaturated carboxylic acid having 4 to 8 carbon atoms (for example, a lithium salt, a potassium salt, a sodium salt and the like). ) And salts of polyvalent metals of unsaturated carboxylic acids having 4 to 8 carbon atoms (eg, magnesium salts, calcium salts, zinc salts, etc.). Examples of unsaturated carboxylic acids having 4 to 8 carbon atoms include acrylic acid, methacrylic acid, etacrilic acid, itaconic acid, itaconic anhydride, fumaric acid, crotonic acid, maleic acid, maleic anhydride; monomethyl maleate, maleic anhydride. Maleic anhydride monoesters such as monoethyl acid: Maleic anhydride monoesters such as monomethyl maleic anhydride and monoethyl maleic anhydride can be mentioned.

The epoxy group-containing resin having a Vicat softening point of less than 80 ° C. may have a monomer unit derived from a monomer other than the epoxy group-containing monomer. Examples of such a monomer include unsaturated carboxylic acid esters such as methyl acrylate, ethyl acrylate, methyl methacrylate and butyl acrylate; and unsaturated vinyl esters such as vinyl acetate and vinyl propionate.

In an epoxy group-containing resin having a Vicat softening point of less than 80 ° C., the monomer unit derived from the monomer having an epoxy group has a content of 100% by mass of all the monomer units in the epoxy group-containing resin. The content is preferably 0.01% by mass to 30% by mass, more preferably 0.1% by mass to 20% by mass. The content of the monomer unit derived from the monomer having an epoxy group is measured by infrared spectroscopy.

The melt flow rate (MRF) of the epoxy group-containing resin having a Vicat softening point of less than 80 ° C. is preferably 0.1 g / 10 min to 300 g / 10 min, preferably 0.5 g / 10 min to 80 g / 10 min. It is more preferable to have.

The epoxy group-containing resin having a Vicat softening point of less than 80 ° C. is, for example, by a high-pressure radical polymerization method, a solution polymerization method or an emulsion polymerization method, in which a monomer unit derived from a monomer having an epoxy group and a simple element derived from ethylene are used. It can be produced by copolymerizing a weight unit and a monomer unit derived from another monomer, if necessary.

[Antioxidant]
The inorganic mineral-containing resin composition of the present invention may contain an antioxidant. Examples of the antioxidant include amine-based, phenol-based, phosphorus-based, bisphenyl-based, and hindered amine-based antioxidants, and examples thereof include dit-butyl-p-cresol and bis (2,2). Arylphosphite such as 6.6-tetramethyl-4-piperazyl) sebacatetris (2,4-di-t-butylphenyl) phosphite, tris (nonylphenyl) phosphite, or triphenylphosphite; trisisodecylphos Alkylphosphite such as phyto, trilaurylphosphite, tris (tridecyl) phosphite; diphenylisooctylphosphite, diphenylisodecylphosphite, diisodecylphenylphosphite, diisooctyloctylphenylphosphite, phenylneopentylglycolphosphite , 2,4,6-tri-t-butylphenyl- (2-butyl-2-ethyl-1,3-propanediol) phosphite, (2,4,8,10-tetrakis (t-butyl) -6 -{(Ethylhexyl) oxy} -12H-dibenzo) [d, g] Alkyl-aryl phosphite such as 1,3,2-dioxaphosphocin; octadecyl-3- (3,5-di-t-butyl- 4-Hydroxyphenyl) propionate, pentaerythritol-tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], 1,3,5-trimethyl-2,4,6-tris (3) , 5-di-t-butyl-4-hydroxybenzyl) benzene, thiodiethylene-bis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionate], N, N'-hexane-1 , 6-Diylbis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionamide], diethyl ((3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl) methyl) Phenyl Phenyl, 3,3', 3'', 5,5', 5''-Hexa-t-butyl-a, a', a''-(methicylene-2,4,6-triyl) tri-p- Cresol, ethylene bis (oxyethylene) bis (3- (5-t-butyl-4-hydroxy-m-tolyl) propionate), hexamethylene-bis (3- (3,5-di-t-butyl-4-) (Hydroxyphenyl) propionate), 1,3,5-tris (3,5-di-t-butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -Trione, 1,3,5-Tris ((4-t-Butyl-3-hydroxy-2,6-xylyl) methyl)-1,3,5-Triazine-2,4,6 (1H, 3H) , 5H) -Trione, 2,6-di-t-Butyl-4- (4,6-bis (octylthio) -1,3,5-triazine-2-ylamino) phenol, 3,9-bis (2-) (3- (3-t-Butyl-4-hydroxy-5-methylphenyl) propionyloxy) -1,1-dimethylethyl) -2,4,8,10-tetraoxaspiro (5,5) undecane. Be done.
The content of the antioxidant is preferably 0.02 parts by mass or more and 0.5 parts by mass or less, and 0.05 parts by mass or more and 0 by mass with respect to 100 parts by mass of the total of the component (A) and the resin. It is more preferably 3 parts by mass or less.

Examples of the inorganic mineral-containing resin composition include, for example.
Examples thereof include an inorganic mineral-containing resin composition in which the component (A) is calcium carbonate and the component (B) contained in the resin is an ethylene-α-olefin copolymer.
An inorganic mineral-containing resin composition in which the component (A) is calcium carbonate and the component (C) contained in the resin is a propylene-based random copolymer.
Examples thereof include an inorganic mineral-containing resin composition in which the component (A) is calcium carbonate and the component (C) contained in the resin is polystyrene.

成分（Ａ）および樹脂の含有量は、それぞれ、成分（Ａ）と樹脂との合計１００質量部に対する含有量である。
成分（Ｂ）および成分（Ｃ）の含有量は、それぞれ、成分（Ｂ）と成分（Ｃ）との合計１００質量％に対する含有量である。 Examples of the inorganic mineral-containing resin composition include, for example.
An inorganic mineral-containing resin composition in which the component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, and the component (C) contained in the resin is a propylene-based random copolymer.
Examples thereof include an inorganic mineral-containing resin composition in which the component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, and the component (C) contained in the resin is polystyrene.
It is preferable that the components (A) to (C) and the resin in each of the above-mentioned inorganic mineral-containing resin compositions have the contents shown in the table below.

The contents of the component (A) and the resin are the contents with respect to a total of 100 parts by mass of the component (A) and the resin, respectively.
The contents of the component (B) and the component (C) are the contents with respect to the total 100% by mass of the component (B) and the component (C), respectively.

成分（Ａ）および樹脂の含有量は、それぞれ、成分（Ａ）と樹脂との合計１００質量部に対する含有量である。
成分（Ｂ）および成分（Ｃ）の含有量は、それぞれ、成分（Ｂ）と成分（Ｃ）との合計１００質量％に対する含有量である。
成分（Ｄ）の含有量は、成分（Ａ）と樹脂との合計１００質量部に対する含有量である。 Examples of the inorganic mineral-containing resin composition include, for example.
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is a propylene-based random copolymer, and the component (D) calcium stearate. Inorganic mineral-containing resin composition,
Inorganic mineral-containing resin in which the component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polystyrene, and the component (D) is calcium stearate. Composition,
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is a propylene-based random copolymer, and the component (D) has a bicut softening point. Inorganic mineral-containing resin composition, which is an epoxy group-containing resin below 80 ° C.,
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polystyrene, and the component (D) is an epoxy having a softening point of less than 80 ° C. Inorganic mineral-containing resin composition, which is a group-containing resin,
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is a propylene-based random copolymer, and the component (D) bicut softening point 80. Inorganic mineral-containing resin composition, which is an ionomer resin below ℃,
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polystyrene, and the component (D) is an ionomer resin having a softening point of less than 80 ° C. Inorganic mineral-containing resin composition, which is
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is a propylene-based random copolymer, and the component (D) calcium stearate and bicut. Inorganic mineral-containing resin composition, which is an ionomer resin having a softening point of less than 80 ° C.
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polystyrene, the component (D) calcium stearate and the Vicat softening point of less than 80 ° C. Inorganic mineral-containing resin composition, which is an epoxy group-containing resin of ionomer resin of
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is a propylene-based random copolymer, and the component (D) calcium stearate and Vicat. Inorganic mineral-containing resin composition, which is an epoxy group-containing resin having a softening point of less than 80 ° C.
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polystyrene, the component (D) calcium stearate and the Vicat softening point of less than 80 ° C. Inorganic mineral-containing resin composition, which is an epoxy group-containing resin of the epoxy group-containing resin of
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is a propylene-based random copolymer, and the component (D) Bicut softening point 80. Inorganic mineral-containing resin compositions, which are ionomer resins below ° C and epoxy group-containing resins with a Vicat softening point of less than 80 ° C.
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polystyrene, and the component (D) is an ionomer resin having a softening point of less than 80 ° C. And an inorganic mineral-containing resin composition which is an epoxy group-containing resin of an epoxy group-containing resin having a softening point of less than 80 ° C.
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is a propylene-based random copolymer, and the component (D) calcium stearate, Vicat. An inorganic mineral-containing resin composition which is an ionomer resin having a softening point of less than 80 ° C. and an epoxy group-containing resin having a softening point of less than 80 ° C.
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polystyrene, the component (D) calcium stearate, and the Vicat softening point is less than 80 ° C. Inorganic mineral-containing resin composition, which is an epoxy group-containing resin of an ionomer resin and an epoxy group-containing resin having a softening point of less than 80 ° C.
The component (A) is calcium carbonate, the component (B) contained in the resin is an ethylene-α-olefin copolymer, the component (C) contained in the resin is polypropylene and polyethylene anhydride maleate, and the component (D) calcium stearate. Examples thereof include an inorganic mineral-containing resin composition.
It is preferable that the components (A) to (D) and the resin in each of the above-mentioned inorganic mineral-containing resin compositions have the contents shown in the table below.

The contents of the component (A) and the resin are the contents with respect to a total of 100 parts by mass of the component (A) and the resin, respectively.
The contents of the component (B) and the component (C) are the contents with respect to the total 100% by mass of the component (B) and the component (C), respectively.
The content of the component (D) is the content with respect to a total of 100 parts by mass of the component (A) and the resin.

[Manufacturing of resin sheets containing inorganic minerals]
The inorganic mineral-containing resin sheet of the present invention contains an inorganic mineral-containing resin composition. The thickness of the inorganic mineral-containing resin sheet is usually 50 μm to 1000 μm. The inorganic mineral-containing resin sheet can be produced by the following method. An inorganic mineral-containing resin composition obtained by blending the component (A), the above resin and an optional component such as an oxygen-containing organic compound or an antioxidant is kneaded using a twin-screw kneader or a Banbury kneader. An inorganic mineral-containing resin sheet can be obtained by sheet-molding the obtained kneaded product with a T-die extrusion molding machine for melt extrusion sheet molding, an inflation film forming machine, or a rolling-molded calendar molding machine. The obtained sheet is preferably stretched in the processing direction and in the direction perpendicular to the processing to finish it as a thin film sheet. Examples of the stretching method include a method of stretching by a longitudinal stretching device and a sheet end fixed type tenter utilizing the difference in peripheral speed of a plurality of rolls, and a method of biaxial stretching by a simultaneous biaxial stretching device.

The stretching ratio in the vertical direction and the stretching ratio in the horizontal direction are preferably 1.1 times to 3.0 times, respectively. The temperature during the stretching treatment is preferably near the melting point of the component (B) to be used.

Hereinafter, the present invention will be described in more detail with reference to Examples.

〔density〕
The density was measured according to the method A specified in JIS K7112-1980 after performing the annealing described in JIS K6760-1980.

[Polyethylene melting point]
The component (B) was pressed with a hot press to prepare a sheet having a thickness of about 0.5 mm. About 10 mg of a test piece was cut out from the obtained sheet. The obtained test piece was used as a measurement sample. The melting point of the measurement sample was measured using a differential scanning calorimeter (DSC-7 manufactured by PerkinElmer). The measurement sample was held at 150 ° C. for 5 minutes, then lowered to 40 ° C. at 1 ° C./min, then held at 40 ° C. for 5 minutes, and then heated to 150 ° C. at a rate of 10 ° C./min. .. The melting point obtained when the temperature was raised from 40 ° C. to 150 ° C. at a rate of 10 ° C./min was defined as the temperature at which the melting peak was shown.

[Vicat softening point]
The component (C) was pressed by a hot press to prepare a sheet having a thickness of about 5 mm. The obtained sheet was measured according to the A50 method specified in JIS K7206-1999.

[Stretchability]
The inorganic mineral-containing resin composition was pressed by a hot press to prepare a sheet. The obtained sheet was uniaxially stretched 1 × 4 times at a speed of 0.31 m / min by a tabletop stretching machine manufactured by Toyo Seiki Co., Ltd. The stretching temperature was set to a temperature rounded up to the first place of the melting point of the component (B), and if stretching could not be performed at that temperature, the obtained sheet was stretched at a temperature 10 ° C. higher than that temperature. If it could not be further stretched at that temperature, the obtained sheet was stretched at a temperature further increased by 10 ° C. from that temperature. When the stretchability could not be achieved under any of the conditions, it was judged that the stretchability was not good and was marked with x. When it was possible to stretch without tearing under any of the conditions, it was judged that the stretchability was good and was evaluated as 〇.

[Rigidity (Young's modulus, unit: MPa)]
In an atmosphere of 23 ° C. and 50% humidity, a 120 mm × 30 mm sheet (collected so that the stretching direction and the long side direction coincide) was taken using an auto strain manufactured by Yasuda Seiki Seisakusho, with a gripping interval of 60 mm and a tensile speed. A tensile test was performed at 5 mm / min, and the initial elastic modulus was determined from the slope of the tangent line at the zero point of the tensile-stress curve. The higher the initial elastic modulus, the better the rigidity.

The materials used in the examples are as follows.
Ingredient (A)
(A1): Calcium carbonate (heavy calcium carbonate) Made by Shiraishi Calcium Co., Ltd. Product name "Whiten (registered trademark) SB blue", average particle size 2.2 μm

Ingredient (B)
(PE-1): Ethylene-α-olefin copolymer manufactured by Sumitomo Chemical Co., Ltd. Product name "Sumikasen (registered trademark) GA401", density = 935 kg / m ³ , MFR = 3.0 g / 10 minutes, melting point = 123 ℃

Ingredient (C)
(RPP-1): Polypropylene-based random copolymer manufactured by Sumitomo Chemical Co., Ltd. Product name "Sumitomo Noblen (registered trademark) S131", Vicat softening point = 111 ° C.
(PSt-1): Polystyrene Toyo Styrene Co., Ltd. Product name "Toyo Styrole (registered trademark) GP G210C", Vicat softening point = 100 ° C.
(MAH-PE-1): Maleic anhydride-modified polyethylene Mitsui Chemicals, Inc. Product name "Admar NB508", Vicat softening point = 93 ° C.

Ingredient (D)
(StCa): Calcium stearate manufactured by Kyodo Yakuhin Co., Ltd. Product name "AR-42", average particle size 10 μm
(BF-1): Epoxide group-containing resin Sumitomo Chemical Co., Ltd. Product name "Bond First (registered trademark) 7M", Vicat softening point = less than 25 ° C (Ionomer-1): Ionomer resin Mitsui DuPont Polychemical Co., Ltd. Product name "Himilan (registered trademark) 1855", Vicat softening point = 56 ° C)

Others (hPP-1): Propylene homopolymer manufactured by Sumitomo Chemical Co., Ltd. Product name "Sumitomo Noblen (registered trademark) FLX80E4", Vicat softening point = 158 ° C.
(EVA-1): Ethylene-vinyl acetate copolymer manufactured by Sumitomo Chemical Co., Ltd. Product name "Smitate (registered trademark) KA-40", Vicat softening point = 38 ° C.

<Example 1>
(A1) 75 parts by mass, (PE-1) 22.5 parts by mass, (rPP-1) 2.5 parts by mass, (StCa) 1.0 part by mass, and tetrakis [methylene-3] which is a phenolic antioxidant. -(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] Methane (Irganox (registered trademark) 1010, manufactured by Ciba Specialty-Chemicals) 0.1 part by mass by labplast mill at 190 ° C. , Kneaded for 10 minutes under the condition of a rotation speed of 25 rpm. The obtained kneaded product was pressed by a hot press at a temperature of 150 ° C. and a pressure of 2 MPa for 5 minutes, and then cooled by a cooling press at a temperature of 30 ° C. for 5 minutes to form a 92 mm × 92 mm thick press sheet having a thickness of about 500 μm. Molded. The obtained press sheet was uniaxially stretched 1 × 4 times at a stretching temperature of 130 ° C. at a speed of 0.31 m / min using a desktop stretching machine manufactured by Toyo Seiki Co., Ltd. to obtain an inorganic mineral-containing resin sheet. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 1.

<Example 2>
A press sheet was obtained in the same manner as in Example 1 except that 2.5 parts by mass of (rPP-1) in Example 1 was changed to 2.5 parts by mass of (PSt-1). The obtained press sheet was stretched in the same manner as in Example 1 to obtain an inorganic mineral-containing resin sheet. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 1.

<Example 3>
A press sheet was obtained in the same manner as in Example 1 except that the blending amount of (PE-1) in Example 1 was 20 parts by mass and the blending amount of (rPP-1) was 5 parts by mass. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 2.

<Example 4>
A press sheet was obtained in the same manner as in Example 1 except that the blending amount of (PE-1) in Example 1 was 17.5 parts by mass and the blending amount of (rPP-1) was 7.5 parts by mass. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 2.

<Example 5>
A press sheet was obtained in the same manner as in Example 1 except that the blending amount of (PE-1) in Example 1 was 15 parts by mass and the blending amount of (rPP-1) was 10 parts by mass. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 2.

<Example 6>
A press sheet was obtained in the same manner as in Example 1 except that the blending amount of (PE-1) in Example 1 was 13.75 parts by mass and the blending amount of (rPP-1) was 11.25 parts by mass. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 2.

<Example 7>
The same as in Example 1 except that the compounding amount of (A1) in Example 1 was 60 parts by mass, the compounding amount of (PE-1) was 36 parts by mass, and the compounding amount of (rPP-1) was 4 parts by mass. I got a press sheet. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 3.

<Example 8>
The same as in Example 1 except that the compounding amount of (A1) in Example 1 was 80 parts by mass, the compounding amount of (PE-1) was 18 parts by mass, and the compounding amount of (rPP-1) was 2 parts by mass. I got a press sheet. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 3.

<Example 9>
A press sheet was obtained in the same manner as in Example 1 except that 0.2 parts by mass of (BF-1) was added in addition to (StCa) of Example 1. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 4.

<Example 10>
A press sheet was obtained in the same manner as in Example 1 except that 0.2 parts by mass of (BF-1) in Example 9 was changed to 0.3 parts by mass of (Ionomer-1). The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 4.

<Example 11>
(A1) 74.8 parts by mass, (PE-1) 22.4 parts by mass, (rPP-1) 2.5 parts by mass, (MAH-PE-1) 0.3 parts by mass, (StCa) 1.0 Tetrakiss [methylene-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] methane (Irganox® 1010, Ciba Specialty-Chemicals), which is a part by mass and a phenolic antioxidant. A press sheet was obtained in the same manner as in Example 1 using 0.1 parts by mass. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 4.

<Comparative Example 1>
A press sheet was obtained in the same manner as in Example 1 except that the blending amount of (PE-1) in Example 1 was 25 parts by mass and (rPP-1) was not used. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 1.

<Comparative Example 2>
A press sheet was obtained in the same manner as in Example 1 except that (rPP-1) of Example 1 was changed to 2.5 parts by mass of (hPP-1). The obtained press sheet could not be stretched at any of the stretching temperatures of 130 ° C., 140 ° C., and 150 ° C., and an inorganic mineral-containing resin sheet could not be obtained.

<Comparative Example 3>
A press sheet was obtained in the same manner as in Example 1 except that the blending amount of (PE-1) in Example 1 was 12.5 parts by mass and the blending amount of (rPP-1) was 12.5 parts by mass. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 2.

<Comparative Example 4>
The press sheet was prepared in the same manner as in Example 1 except that the compounding amount of (A1) in Example 1 was 60 parts by mass, the compounding amount of (PE-1) was 40 parts by mass, and (rPP-1) was not used. Obtained. The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 3.

<Comparative Example 5>
A press sheet was obtained in the same manner as in Example 1 except that (rPP-1) of Example 1 was changed to 2.5 parts by mass of (EVA-1). The obtained press sheet can also be stretched at a stretching temperature of 130 ° C., and an inorganic mineral-containing resin sheet was obtained. The Young's modulus of the obtained inorganic mineral-containing resin sheet was measured, and the results are shown in Table 4.

Claims (7)

An inorganic mineral-containing resin composition containing the following component (A) and a resin.
70 to 90 parts by mass of the component (A) and 10 to 30 parts by mass of the resin are contained in a total of 100 parts by mass of the component (A) and the resin, and
70 to 90 parts by mass of calcium carbonate and 10 to 30 parts by mass of resin are contained with respect to a total of 100 parts by mass of calcium carbonate and resin.
The resin contains the following component (B) and the following component (C).
Inorganic containing more than 50% by mass of the following component (B) and 97% by mass or less and 3% by mass or more and less than 50% by mass of the following component (C) with respect to a total of 100% by mass of the component (B) and the component (C). Mineral-containing resin composition.

Component (A): Inorganic mineral powder containing calcium carbonate
Component (B): Polyethylene Component (C): Polymer other than component (B) and having a Vicat softening point of 80 ° C. or higher and 130 ° C. or lower. At least one polymer having a Vicat softening point of 80 ° C. or higher and 130 ° C. or lower selected from the group consisting of polypropylene, styrene resin, halogenated resin, acrylic resin, maleic anhydride-modified polyethylene, ionomer resin and polyamide as the component (C). The inorganic mineral-containing resin composition according to claim 1. The inorganic mineral-containing resin composition according to claim 1 or 2, wherein the component (C) is a polymer having a Vicat softening point of 90 ° C. or higher and 120 ° C. or lower. The inorganic mineral-containing resin composition according to any one of claims 1 to 3, further comprising the following component (D).

Component (D): Oxygen-containing organic compound (excluding component (C)) The inorganic mineral-containing resin composition according to claim 4, which contains the component (D) of 0.01 to 10 parts by mass or less with respect to 100 parts by mass of the total of calcium carbonate and the resin. The component (D) is a fatty acid, an aliphatic amide, an aliphatic ester metal soap, an alcohol, a nonionic surfactant, an epoxy group-containing resin having a Vicat softening point of less than 80 ° C., and a maleic anhydride modification having a Vicat softening point of less than 80 ° C. The inorganic mineral-containing resin composition according to claim 4 or 5, which is at least one selected from polyethylene, maleic anhydride-modified polyethylene having a Vicat softening point of more than 130 ° C., and an ionomer resin having a Vicat softening point of more than 130 ° C. thing. An inorganic mineral-containing resin sheet containing the inorganic mineral-containing resin composition according to any one of claims 1 to 6.