TW202300576A - Method for manufacturing molding comprising thermoplastic resin and antimicrobial agent - Google Patents

Abstract

The present invention provides a production method for a molded body that contains a thermoplastic resin and an antimicrobial material and has excellent antimicrobial properties at the surface thereof, the method making it possible to easily give the surface of the molded body an antimicrobial function. Provided is a production method for a molded body that contains a thermoplastic resin and an antimicrobial agent. The production method includes: a step in which a mixture that includes a thermoplastic resin monomer and the antimicrobial agent is left to stand to allow the antimicrobial agent to settle; and a step in which, after the antimicrobial agent has settled, the thermoplastic resin monomer is polymerized to produce the thermoplastic resin.

Description

Method for producing molded body containing thermoplastic resin and antibacterial agent

The invention relates to a manufacturing method of a molded body containing a thermoplastic resin and an antibacterial agent.

It is known that an antibacterial resin composition containing a thermoplastic resin and an antibacterial agent can be used in various fields. For example, the following Patent Document 1 describes an antibacterial resin composition comprising an antibacterial zeolite and a thermoplastic resin. The antibacterial zeolite is obtained by replacing part or all of the ion-exchangeable ions in the zeolite with hydrogen ions and silver ions. , and describes that the antibacterial resin composition is coated on the surface of paint or building materials to impart antibacterial properties to these surfaces. [Prior Art Literature] [Patent Document]

Patent Document 1: Japanese Patent Laid-Open No. 2007-91501

[Problem to be solved by the invention]

The method described in the above-mentioned Patent Document 1 requires a complicated step of applying an antibacterial resin composition to the surface to impart antibacterial properties to the surface of paint or building materials.

Therefore, an object of the present invention is to provide a method for producing a molded body which can impart antibacterial properties to the surface of a molded body containing a thermoplastic resin and an antibacterial material by a simple method, and which has excellent antibacterial properties on the surface. [Technical means to solve the problem]

The present invention includes the following aspects. [1] A method for manufacturing a molded body, which is a method for manufacturing a molded body containing a thermoplastic resin and an antibacterial agent, and includes: a step of allowing the mixture comprising the thermoplastic resin monomer and the antimicrobial agent to settle to allow the antimicrobial agent to settle; and The step of obtaining thermoplastic resin by polymerizing thermoplastic resin monomer in the state of antibacterial agent sedimentation. [2] The production method according to [1], wherein the total content of the thermoplastic resin and the antibacterial agent is 100% by mass, The content of the antibacterial agent is 0.01% by mass to 15% by mass. [3] The production method according to [1] or [2], wherein the thermoplastic resin is a (meth)acrylic resin. [4] The production method according to any one of [1] to [3], wherein the antibacterial agent is a zeolite-based antibacterial agent. [5] An antibacterial sheet comprising a molded body obtained by the production method according to any one of [1] to [4]. [Effect of Invention]

According to the present invention, it is possible to provide a method for producing a molded body which can impart antibacterial properties to the surface of a molded body containing a thermoplastic resin and an antibacterial material by a simple method, and which has excellent antibacterial properties on the surface.

[Manufacturing method of molded body] A method for producing a molded article containing a thermoplastic resin and an antibacterial agent of the present invention (hereinafter also referred to as "the method for producing a molded article of the present invention") will be described.

The manufacturing method of the molded body of the present invention comprises: the step of allowing the mixture comprising the thermoplastic resin monomer and the antibacterial agent to settle to allow the antibacterial agent to settle; step.

In this specification, the term "thermoplastic resin monomer" means "a monomer which is a raw material of a thermoplastic resin". In the manufacturing method of the molded article of the present invention, in the step of allowing the antibacterial agent to settle, the thermoplastic resin monomer and the antibacterial agent are mixed, and the antibacterial agent is dispersed under the condition that the polymerization of the thermoplastic resin monomer is not initiated, and the obtained When the obtained dispersion is left to stand, at least a part of the antibacterial agent may settle. Thermoplastic resin monomers can be used in combination with thermoplastic resins.

In a preferred embodiment, the cup viscosity of the thermoplastic resin monomer is preferably from 0.1 second to 18 seconds, more preferably from 0.5 second to 15 seconds, and still more preferably from 1 second to 13 seconds. When the cup viscosity of the thermoplastic resin monomer is less than 0.1 second, the antibacterial agent settles in a short time, so when the thermoplastic resin monomer dispersed with the antibacterial agent is transferred from the mixing container to the polymerization container, the antibacterial agent settles to the mixing container At the bottom, a specific amount of antimicrobial agent cannot be transferred to the polymerization vessel. When the cup viscosity of the thermoplastic resin monomer is greater than 18 seconds, the antibacterial agent does not settle in the polymerization container, for example, the molded body produced by casting polymerization has poor antibacterial properties. Here, the thermoplastic resin monomer used in casting polymerization before heating was used as a sample, and the time taken for the sample to pass through a cylinder having a shape of a truncated cone was defined as the cup viscosity according to the following procedure. The above-mentioned cylinder having the shape of a truncated cone is made of stainless steel, the inner diameter of the upper surface is 37 mm, the inner diameter of the lower surface is 5 mm, and the height is 65 mm.

The specific procedure is shown below. Inject the above sample into a cylindrical beaker with an inner diameter of 100 mm and a height of 110 mm until the liquid level is above 80 mm. Immerse the above-mentioned truncated cone-shaped cylinder below the liquid level of the sample, so that A cylinder having the shape of a truncated cone is filled with a sample. Thereafter, the cylinder having the shape of a truncated cone was lifted vertically so as to be higher than the liquid level of the sample put into the beaker. Measure the time from the moment of lifting until the sample in the cylinder having the shape of the truncated cone flows out, and use this time as the cup viscosity (unit: second).

In a preferred form, the molding system of the present invention is produced by allowing the mixture of the thermoplastic resin monomer and the antibacterial agent to settle down to the vertically lower side, followed by polymerization and molding. In this form, it is preferable to use a casting polymerization method as a manufacturing method of the molded body.

Here, the cast polymerization method of the present invention will be described with reference to FIG. 1 . Fig. 1 is a diagram for explaining cast polymerization. More specifically, as shown in FIG. 1, prepare two supporting plates 12, typically two glass plates and sealing gaskets 13, and sandwich the sealing gaskets 13 between the two supporting plates 12 facing each other at a specific distance. Between them, a space (hereinafter, also referred to as "groove") is formed for casting raw material (dispersion liquid) 11. The distance between the supporting plates 12 can be appropriately adjusted so as to obtain a structure having a desired thickness. In one form, the distance between the support plates 12 is preferably 0.3-100 mm, more preferably 0.5-20 mm, further preferably 1-10 mm, and more preferably 1-5 mm.

Separately, a dispersion liquid poured into the tank was prepared. The dispersion liquid can be obtained by mixing the liquid thermoplastic resin monomer with the antibacterial agent, degassing, and dispersing the antibacterial agent by ultrasonic wave or the like. The dispersion liquid may contain other components such as a polymerization initiator and the like.

The above-obtained dispersion liquid was poured into the tank so that one support plate was positioned on the lower side in the vertical direction (the direction indicated by the hollow arrow) and the other support plate was positioned on the vertical direction upper side. Standing is carried out under the condition of not initiating the polymerization of the thermoplastic resin monomer until the antibacterial agent in the dispersion near the support plate settles to the required density. In order to obtain a molded product with excellent antibacterial properties, the higher the density of the antibacterial agent in the dispersion liquid near the support plate, the better. Just let it stand until the dispersion liquid reaches a stable state. When giving priority to production efficiency, it is preferable that the time required for production is shorter, as long as the standing time is shorter than the time for the dispersion to reach a stable state. In order to achieve the above-mentioned required density, the viscosity of the dispersion and the resting time can be selected.

After standing, molding can be performed by polymerizing a thermoplastic resin monomer to obtain a molded body. Polymerization conditions can be appropriately set depending on the raw materials used.

In the molded article obtained by the method for producing a molded article of the present invention, the antibacterial agent after sedimentation concentrates on one side (lower surface) side.

[thermoplastic resin] The thermoplastic resin in the manufacturing method of the molded article of this invention is demonstrated.

The thermoplastic resin may be a transparent thermoplastic resin.

Examples of thermoplastic resins include (meth)acrylic resins, polycarbonate resins, polyetherimide resins, polyester resins, polystyrene resins, polyether resins, fluorine resins, ABS, etc. (Acrylonitrile-Butadiene-Styrene, acrylonitrile-butadiene-styrene) resin, AS (Acrylonitrile-Styrene, acrylonitrile-styrene) resin, polyvinyl chloride and polyolefin resin. The thermoplastic resin can be appropriately selected depending on the required properties. The thermoplastic resin may be one kind or a mixture of two or more kinds. From the viewpoint of transparency and scratch resistance, the thermoplastic resin is preferably a (meth)acrylic resin, more preferably a methacrylic resin.

In this specification, the term "(meth)acrylic resin" includes acrylic resin and methacrylic resin.

(methacrylic resin) The methacrylic resin is a polymer having a structural unit derived from a monomer having a methacryl group.

As the methacrylic resin, for example, a methacrylic acid homopolymer containing only a structural unit derived from an alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms; Up to 100% by mass of structural units derived from alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms, and more than 0% by mass but less than 15% by mass of structural units derived from an alkyl group having 1 to 4 carbon atoms A methacrylic acid copolymer that is a structural unit of other vinyl monomers copolymerized with alkyl methacrylate.

"Alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms" is a compound represented by CH ₂ ═CH(CH ₃ )COOR (R is an alkyl group having 1 to 4 carbon atoms). Vinyl monomers that can be copolymerized with alkyl methacrylates having an alkyl group having 1 to 4 carbons are copolymerizable with alkyl methacrylates having an alkyl group having 1 to 4 carbons and have a vinyl group monomer.

Examples of the alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms include methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, methyl methacrylate, and methyl methacrylate. n-butyl acrylate, tertiary butyl methacrylate, second butyl methacrylate, and isobutyl methacrylate. The alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms is preferably methyl methacrylate. Alkyl methacrylate may be used individually or in mixture of 2 or more types.

Examples of vinyl monomers that can be copolymerized with alkyl methacrylates having an alkyl group having 1 to 4 carbon atoms include: cyclohexyl methacrylate, benzyl methacrylate, 2-ethyl methacrylate Hexyl methacrylate, 2-hydroxyethyl methacrylate, hydroxypropyl methacrylate, monoglyceryl methacrylate and other methacrylates (among them, alkyl methacrylates having an alkyl group with Except); methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, monoglyceryl acrylate and other acrylates; acrylic acid , methacrylic acid, maleic acid, itaconic acid, maleic anhydride, itaconic anhydride and other unsaturated carboxylic acids or their anhydrides; acrylamide, methacrylamide, acrylonitrile, methacrylonitrile, di Acetone acrylamide, dimethylaminoethyl methacrylate and other nitrogen-containing monomers; allyl glycidyl ether, glycidyl acrylate, glycidyl methacrylate and other epoxy-containing monomers; styrene, Styrenic monomers such as α-methylstyrene.

As a method for producing methacrylic resins, for example, methacrylic acid having an alkyl group having 1 to 4 carbon atoms can be prepared by mass polymerization (such as the above-mentioned cast polymerization), solution polymerization, suspension polymerization, emulsion polymerization, etc. A method of polymerizing an alkyl ester and, if necessary, a vinyl monomer that can be copolymerized with an alkyl methacrylate having an alkyl group having 1 to 4 carbon atoms.

(polycarbonate resin) In this specification, a "polycarbonate-based resin" is a polycarbonate-based resin containing a structural unit derived from a dihydroxy compound. In the present invention, examples of polycarbonate-based resins that can be used as thermoplastic resins include carbonylation of dihydroxy compounds such as dihydric phenols and isosorbides by interfacial polycondensation or melt transesterification. Resin obtained by reacting a reagent; a resin obtained by polymerizing a carbonate prepolymer by a solid-phase transesterification method; and a resin obtained by polymerizing a cyclic carbonate compound by a ring-opening polymerization method.

Examples of dihydric phenols include: hydroquinone, resorcinol, 4,4'-dihydroxybiphenyl, bis(4-hydroxyphenyl)methane, bis{(4-hydroxy-3,5 -Dimethyl)phenyl}methane, 1,1-bis(4-hydroxyphenyl)ethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 2,2-bis (4-hydroxyphenyl)propane (commonly known as bisphenol A), 2,2-bis{(4-hydroxy-3-methyl)phenyl}propane, 2,2-bis{(4-hydroxy-3, 5-Dimethyl)phenyl}propane, 2,2-bis{(4-hydroxy-3,5-dibromo)phenyl}propane, 2,2-bis{(3-isopropyl-4-hydroxy )phenyl}propane, 2,2-bis{(4-hydroxy-3-phenyl)phenyl}propane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4- hydroxyphenyl)-3-methylbutane, 2,2-bis(4-hydroxyphenyl)-3,3-dimethylbutane, 2,4-bis(4-hydroxyphenyl)-2- Methylbutane, 2,2-bis(4-hydroxyphenyl)pentane, 2,2-bis(4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl) base) cyclohexane, 1,1-bis(4-hydroxyphenyl)-4-isopropylcyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethyl Cyclohexane, 9,9-bis(4-hydroxyphenyl) fluorene, 9,9-bis{(4-hydroxy-3-methyl)phenyl} fluorene, α,α'-bis(4-hydroxybenzene base) o-diisopropylbenzene, α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene, α,α'-bis(4-hydroxyphenyl)-p-diisopropylbenzene, 1 ,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane, 4,4'-dihydroxydiphenylene, 4,4'-dihydroxydiphenylene, 4,4' - Dihydroxydiphenyl sulfide, 4,4'-dihydroxydiphenyl ketone, 4,4'-dihydroxydiphenyl ether and 4,4'-dihydroxydiphenyl ester. These may be used alone or in combination of two or more.

Among these dihydric phenols, bisphenol A, 2,2-bis{(4-hydroxy-3-methyl)phenyl}propane, 2,2-bis(4-hydroxyphenyl) Butane, 2,2-bis(4-hydroxyphenyl)-3-methylbutane, 2,2-bis(4-hydroxyphenyl)-3,3-dimethylbutane, 2,2- Bis(4-hydroxyphenyl)-4-methylpentane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane and α,α'-bis(4 -hydroxyphenyl) m-diisopropylbenzene. It is especially preferred to use bisphenol A alone, or use bisphenol A in combination with 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 2,2-bis{( At least one species selected from the group consisting of 4-hydroxy-3-methyl)phenyl}propane and α,α'-bis(4-hydroxyphenyl)-m-diisopropylbenzene.

Examples of the carbonylating agent include acyl halides (phosgene, etc.), carbonates (diphenyl carbonate, etc.), and haloformates (dihaloformates of dihydric phenols, etc.). These may be used alone or in combination of two or more.

In the method for producing a molded article of the present invention, the content of the thermoplastic resin is preferably 85 to 99.99% by mass, more preferably 98% by mass relative to the total of 100% by mass of the content of the thermoplastic resin and the content of the antibacterial agent. ~99.8% by mass.

[Antibacterial agents] The antimicrobial agent in the method for producing the molded article of the present invention will be described.

As an antibacterial agent, a zeolite type antibacterial agent, an organic type antibacterial agent, and an inorganic type antibacterial material are mentioned, for example. The antibacterial agent is preferably a zeolite-based antibacterial agent or an organic antibacterial agent, more preferably a zeolite-based antibacterial agent.

As a zeolite type antimicrobial agent, the compound which carried antimicrobial metal ion, such as silver, copper, zinc, etc. on zeolite, is mentioned, for example.

Examples of organic antibacterial agents include imidazole antibacterial agents such as thiazolylbenzimidazole, quaternary ammonium antibacterial agents such as benzalkonium chloride, and thiazoline antibacterial agents such as 2-methyl-isothiazolin-3-one. Antibacterial agents, alcohol antibacterial agents such as ethanol, biguanide antibacterial agents, phenolic antibacterial agents, pyridine antibacterial agents, nitrile antibacterial agents, isothiazoline antibacterial agents, organic copper antibacterial agents, organic iodine antibacterial agents, And other natural antibacterial agents (for example, polyphenols such as catechin, acidic or alkaline polysaccharides such as pectin and chitosan, basic peptides or proteins such as protamine, polylysine, and nisin) . The organic antibacterial agent is preferably an imidazole-based antibacterial agent, a quaternary ammonium-based antibacterial agent, or an alcohol-based antibacterial agent.

Examples of inorganic antibacterial agents include compounds with photocatalyst functions represented by titanium oxide and zinc oxide, antibacterial metals such as silver, copper, zinc, and nickel, and oxides and chlorides of these antibacterial metals. , sulfide, and iodide.

In the method for producing a molded article of the present invention, the content of the antibacterial agent is preferably 0.01% by mass to 15% by mass, more preferably 0.1% by mass relative to the total of the content of the thermoplastic resin and the content of the above-mentioned antibacterial agent 100% by mass. ~10% by mass, more preferably 0.2% by mass to 2% by mass.

[other ingredients] Other components in the method for producing the molded article of the present invention will be described.

In the method for producing the molded article of the present invention, ultraviolet absorbers, antioxidants, release agents, antistatic agents, flame retardants, and the like can be used as necessary.

As the ultraviolet absorber, for example, benzophenone ultraviolet absorber, cyanoacrylate ultraviolet absorber, benzotriazole ultraviolet absorber, malonate ultraviolet absorber, oxalyl aniline ultraviolet absorber, UV absorber.

As an antioxidant, a phenolic antioxidant, sulfur type antioxidant, phosphorus antioxidant is mentioned, for example.

Examples of the release agent include higher fatty acid esters, higher aliphatic alcohols, higher fatty acids, higher fatty acid amides, higher fatty acid metal salts, and fatty acid derivatives.

As an antistatic agent, a tertiary amine, a quaternary ammonium salt, a cationic acrylate derivative, and a cationic vinyl ether derivative are mentioned, for example.

Examples of the flame retardant include cyclic nitrogen compounds, phosphorus-based flame retardants, silicon-based flame retardants, cage silsesquioxane and its partially cleaved structure, and silica-based flame retardants.

In the manufacturing method of the molded object of this invention, coloring agents, such as a dye and a pigment, can be used as needed. The inclusion of a colorant impairs the transparency, but the molded article has good color rendering properties, so it can be colored in various colors.

Examples of colorants include perylene dyes, pyrene dyes, pyrazolone dyes, methine dyes, coumarin dyes, quinophthalone dyes, quinoline dyes, anthraquinone dyes, Anthraquinone-based dyes, anthrapyridone-based dyes, thioindigo-based dyes, coumarin-based dyes, isoindolinone-based pigments, diketopyrrolopyrrole-based pigments, condensed azo-based pigments, benzimidazolone-based pigments , di㗁𠯤 pigments, copper phthalocyanine pigments, quinacridone pigments, nickel complex compounds, zinc stearate, magnesium stearate, calcium stearate, aluminum stearate, polymethyl Semisiloxane, Copper Halide Phthalocyanine, Ethylene Distearamide, Ultramarine Blue, Ultramarine Violet, Ketjen Black, Acetylene Black, Furnace Black, Carbon Black, Liquid Paraffin, Silicone Oil.

[formed body] The thickness of the molded body obtained by the manufacturing method of the molded body of the present invention is preferably 0.3-100 mm, more preferably 0.5-20 mm, further preferably 1-10 mm, more preferably 1-5 mm. By setting the thickness of the molded body to the thickness in the above-mentioned range, a molded body excellent in strength and transparency can be obtained.

In one form, the thickness of the molded body is 0.3-100 mm, more preferably 0.5-20 mm, further preferably 1-10 mm, more preferably 1-5 mm, according to JIS (Japanese Industrial Standards, Japan Industrial Standards) ) K7136 and the measured haze is 4% or less, preferably 3% or less, more preferably 1% or less. In a preferred form, the thickness of the molded body is 1 to 5 mm, and the haze measured in accordance with JIS K7136 is 3% or less, preferably 1% or less.

In one aspect, in the molded article obtained by the method for producing a molded article of the present invention, the antimicrobial agent concentrates on at least one side (lower surface) of the molded article. The antibacterial agent is preferably segregated from the surface of the molded body to a depth of 100 μm, more preferably to a depth of 20 μm, more preferably to a depth of 10 μm, and further More preferably, it is within the range of a depth of 5 μm. In other words, in the molded article, the thickness of the region where the antibacterial agent exists is preferably at most 100 μm, more preferably at most 20 μm, further preferably at most 10 μm, and even more preferably at most 5 μm. Here, "segregated presence" means that among the antibacterial agents in the molded body, it is preferably at least 80% by mass, more preferably at least 90% by mass, further preferably at least 95% by mass, and most preferably at least 98% by mass The above, preferably substantially all of the antimicrobial agents are present in a specific area, such as near the lower surface. [Example]

Hereinafter, the resin composition of the present invention will be described with reference to examples, but the content of the present invention is not particularly limited to these examples.

＜Evaluation of antibacterial properties＞ For the lower surface of the sheet produced in the examples (the surface located on the lower surface during polymerization in the tank), Escherichia coli and Staphylococcus aureus were used as objects, according to "JIS Z2801 Antibacterial processed products-antibacterial test method/antibacterial effect 5. Item "Test method", implement the test. In addition, the test piece (the surface of the test object) was subjected to the test pretreatment of the water resistance treatment [subsection 1] based on the sustainable standard of the Antimicrobial Product Technology Association.

In the antibacterial test, the antibacterial activity value is more than 3, and the reproduction of the target fungus is greatly inhibited: ○ (good) In the antibacterial test, the antibacterial activity value is more than 2 and less than 3, showing a slight inhibitory effect on the reproduction of the target fungus: Δ (qualified) In the antibacterial test, the antibacterial activity value did not reach 2, and the effect on the reproduction of the target fungus was not confirmed: × (unqualified)

＜Evaluation of transparency＞ The sheets produced in Examples were measured in accordance with the method described in JIS K7136 (2000) Method for determining the haze of transparent materials.

(優) 霧度為3.0%以上且未達10.0%(稍有白濁)：○(良) 霧度為10.0%以上且未達20.0%(白濁)：Δ(合格) 霧度為20.0%以上(顯著白濁)：×(不合格) Haze less than 3.0% (transparent or almost transparent):

(Excellent) Haze of 3.0% or more and less than 10.0% (slightly cloudy): ○ (Good) Haze of 10.0% or more and less than 20.0% (white cloud): Δ (Pass) Haze of 20.0% or more ( Significantly cloudy): × (unqualified)

<Example 1> 99.80% by mass of slurry containing methyl methacrylate and polymethyl methacrylate, antibacterial agent ("AV10D-T No.8" manufactured by Sinanen Zeomic Co., Ltd.) , silver zeolite antibacterial agent) 0.2% by mass, 0.039 mass parts of 2,2'-azobis(isobutyronitrile) as an initiator, 0.01 mass parts of release agent, and 0.01 mass parts of ultraviolet absorber are mixed to obtain mixture. This mixture was cast into a tank with a gap of 3.8 mm between two glass plates and a gasket made of vinyl chloride, heated at 60°C for 6 hours to polymerize, and then heated at 100°C for 1 hour to polymerize. A plate-shaped sheet having a thickness of 3 mm was obtained. Regarding the obtained sheet of the plate-shaped resin composition having a thickness of 3 mm, the lower surface (surface) thereof had antibacterial properties. The composition and evaluation results are shown in Tables 1 and 2.

<Examples 2 to 8 and Comparative Example 1> Except for changing the viscosity of the slurry or the contents of the slurry and the antibacterial agent, a sheet with a thickness of 3 mm was obtained in the same manner as in Example 1. The composition and evaluation results are shown in Tables 1 and 2.

<Example 9> In addition to using 1.0% by mass of BM103NA (50) (silver glass-based antibacterial agent) manufactured by Fuji Chemical Co., Ltd. instead of 0.2% by mass of the antibacterial agent ("AV10D-T No.8" manufactured by Sinanen Zeomic Co., Ltd.), by the same method as in Example 1 The same method was used to obtain a 3 mm sheet. The composition and evaluation results are shown in Tables 1 and 2.

<Example 10> Except using 1.0% by mass of Sinanen Zeomic KM-10D (silver glass-based antibacterial agent) instead of 0.2% by mass of antibacterial agent ("AV10D-T No.8" produced by Sinanen Zeomic Company), the same method as in Example 1 was used. method to obtain a sheet with a thickness of 3 mm. The composition and evaluation results are shown in Tables 1 and 2.

<Example 11> Except using 1.0% by mass of Sinanen Zeomic LJ-10D (silver zeolite-based antibacterial agent) instead of 0.2% by mass of antibacterial agent ("AV10D-T No.8" manufactured by Sinanen Zeomic Company), the same method as in Example 1 was used. method to obtain a sheet with a thickness of 3 mm. The composition and evaluation results are shown in Tables 1 and 2.

<Example 12> In addition to using 1.0% by mass of ZAF-HS (silver glass-based antibacterial agent) manufactured by ISHIZUKA GLASS instead of 0.2% by mass of antibacterial agent ("AV10D-T No.8" manufactured by Sinanen Zeomic Company), the same method as in Example 1 was used. In this way, a sheet with a thickness of 3 mm was obtained. The composition and evaluation results are shown in Tables 1 and 2.

[Table 1] Serum Antibacterial agents Initiator Release agent UV absorber Cup viscosity quality% quality% parts by mass parts by mass parts by mass Second Example 1 99.8 0.2 (AVD10D-T No.8) 0.039 0.01 0.01 9.0 Example 2 99.9 0.1 (AVD10D-T No.8) 0.039 0.01 0.01 9.0 Example 3 99.5 0.5 (AVD10D-T No.8) 0.039 0.01 0.01 9.1 Example 4 99.0 1.0 (AVD10D-T No.8) 0.039 0.01 0.01 9.4 Example 5 98.0 2.0 (AVD10D-T No.8) 0.039 0.01 0.01 9.5 Example 6 98.0 2.0 (AVD10D-T No.8) 0.039 0.01 0.01 3.8 Example 7 95.0 5.0 (AVD10D-T No.8) 0.039 0.01 0.01 9.3 Example 8 90.0 10.0 (AVD10D-T No.8) 0.039 0.01 0.01 9.3 Example 9 99.0 1.0 (BM103NA(50)) 0.039 0.01 0.01 9.0 Example 10 99.0 1.0 (KM-10D) 0.039 0.01 0.01 9.0 Example 11 99.0 1.0 (LJ-10D) 0.039 0.01 0.01 9.0 Example 12 99.0 1.0 (ZAF-HS) 0.039 0.01 0.01 9.0 Comparative example 1 100 0 0.039 0.01 0.01 9.0

實施例2 Δ Δ 2.0

實施例3 ○ ○ 2.4

實施例4 ○ ○ 2.5

實施例5 ○ ○ 4.3 ○ 實施例6 ○ ○ 2.7

實施例7 ○ ○ 11.3 Δ 實施例8 ○ ○ 23.7 × 實施例9 ○ ○ 17.6 Δ 實施例10 ○ ○ 57.7 × 實施例11 ○ ○ 86.3 × 實施例12 ○ ○ 48.1 × 比較例1 × × 0.5

[產業上之可利用性] [Table 2] Antibacterial property (sheet lower surface) transparency Escherichia coli Staphylococcus aureus Haze Evaluate Example 1 ○ ○ 2.3

Example 2 Δ Δ 2.0

Example 3 ○ ○ 2.4

Example 4 ○ ○ 2.5

Example 5 ○ ○ 4.3 ○ Example 6 ○ ○ 2.7

Example 7 ○ ○ 11.3 Δ Example 8 ○ ○ 23.7 x Example 9 ○ ○ 17.6 Δ Example 10 ○ ○ 57.7 x Example 11 ○ ○ 86.3 x Example 12 ○ ○ 48.1 x Comparative example 1 x x 0.5

[Industrial availability]

According to the present invention, it is possible to provide a method for producing a molded body which can impart antibacterial properties to the surface of a molded body containing a thermoplastic resin and an antibacterial agent by a simple method, and which is also excellent in the antimicrobial property of the surface.

11: raw material 12: Support board 13: Gasket

Fig. 1 is a diagram for explaining cast polymerization.

11: raw material

12: Support board

13: Gasket

Claims (5)

A method for manufacturing a molded body, which is a method for manufacturing a molded body containing a thermoplastic resin and an antibacterial agent, and includes: a step of allowing the mixture comprising the thermoplastic resin monomer and the antimicrobial agent to settle to allow the antimicrobial agent to settle; and The step of obtaining thermoplastic resin by polymerizing thermoplastic resin monomer in the state of antibacterial agent sedimentation. The production method according to claim 1, wherein the total content of the above-mentioned thermoplastic resin and the above-mentioned antibacterial agent is 100% by mass, The content of the antibacterial agent is 0.01% by mass to 15% by mass. The production method according to claim 1 or 2, wherein the thermoplastic resin is a (meth)acrylic resin. The production method according to any one of claims 1 to 3, wherein the above-mentioned antibacterial agent is a zeolite-based antibacterial agent. An antibacterial sheet comprising a molded body obtained by the manufacturing method according to any one of claims 1 to 4.

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