Antibacterial paper and method for manufacturing the same

Abstract

To provide excellent antibacterial paper.SOLUTION: The present invention provides antimicrobial paper having a layer containing antimicrobial agent and polysaccharide on base paper.SELECTED DRAWING: None

Description

[Technical Field]

[0001] The present invention relates to antibacterial paper and a method for producing the same. [Background technology]

[0002] Antibacterial paper with added antibacterial properties is known. For example, Patent Document 1 describes paper with an inorganic antibacterial agent such as antibacterial zeolite added externally, and Patent Document 2 describes paper with an antibacterial agent added internally. Furthermore, Patent Document 3 proposes producing antibacterial paper using an aqueous solution of chlorhexidine gluconate. [Prior art documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 09-003799 [Patent Document 2] Japanese Patent Application Publication No. 09-003800 [Patent Document 3] Japanese Patent Publication No. 2009-242299 [Overview of the project] [Problems that the invention aims to solve]

[0004] The object of the present invention is to provide an excellent antibacterial paper and a method for producing the same. [Means for solving the problem]

[0005] The present invention is not limited to the following inventions. [1] A method for producing antimicrobial paper, comprising coating an antimicrobial agent and a polysaccharide onto a base paper. [2] The method according to [1], wherein a coating solution containing an antibacterial agent and a polysaccharide is applied to a base paper. [3] The method according to [1] or [2], wherein the polysaccharide contains starch and the antimicrobial agent contains a surfactant. [4] The method according to any of [1] to [3], wherein the coating solution is applied by a pounding method or a film transfer method. [5] Antimicrobial paper having a layer on the base paper containing an antimicrobial agent and polysaccharides. [6] The antibacterial paper described in [5], wherein the weight ratio of the antibacterial agent to the polysaccharide is 2:1 to 1:200. [7] The antibacterial paper according to [5] or [6], wherein the polysaccharide contains starch and the antibacterial agent contains a surfactant. [8] An antibacterial paper according to any of [5] to [7], which is a fine paper that does not have a pigment coating layer. [9] Antimicrobial paper possessing antiviral activity, as described in any of [5] to [8]. [Effects of the Invention]

[0006] According to the present invention, excellent antibacterial paper and a method for producing the same are provided. [Modes for carrying out the invention]

[0007] The present invention relates to antibacterial paper having an antibacterial layer provided on a base paper. The antibacterial paper according to the present invention has a transparent antibacterial layer containing an antibacterial agent and polysaccharides on a base paper, and is obtained by applying a surface treatment liquid (coating liquid) to the base paper.

[0008] The antibacterial paper according to the present invention has antibacterial properties, and the antibacterial activity value measured according to the antibacterial test method of JIS L1902 is approximately 3.0 or higher. However, since the antibacterial test measures how much bacterial growth can be suppressed, if the sample itself has bacteriostatic (bactericidal) properties, the inoculated bacteria may not grow and the antibacterial activity value may be low. Therefore, in the present invention, even if the number of viable bacteria immediately after inoculation in the antibacterial test is less than 20, the paper is considered to have antibacterial properties.

[0009] In a preferred embodiment, the antibacterial paper according to the present invention possesses not only antibacterial properties but also antiviral activity. The antibacterial paper according to the present invention preferably has an antiviral activity value (Mv) of about 2.0 or higher, as measured according to JIS L1922, and may have an antiviral activity value of 2.5 or higher, 3.0 or higher, or 3.5 or higher.

[0010] In this invention, a layer containing an antibacterial agent and polysaccharides is provided on the base paper. For example, the amount of coating can be adjusted by adjusting the viscosity of the surface treatment solution or the coating speed. That is, by lowering the viscosity using a surfactant or the like, the coating solution can be made to penetrate more easily into the paper, or by coating at high speed, the coating solution can be made to remain on the paper surface. In one embodiment of this invention, by coating the surface of the paper with polysaccharides such as starch, not only the surface strength but also the stiffness of the paper can be improved, and furthermore, the interlayer strength can be improved by the polysaccharides penetrating appropriately into the paper layers.

[0011] The antibacterial paper obtained in this invention can be used as is as a product for a variety of applications without limitation. For example, it can be used as printing paper, writing paper, book paper, newsprint, packaging paper, tissue paper, base paper for pigment-coated paper, various information recording papers such as inkjet recording, thermal recording, and carbonless copying, and their base papers. Considering its use as printing paper, the post-print gloss of the antibacterial paper according to this invention is preferably 40% or more, more preferably 50% or more, and even more preferably 60% or more. On a 10-point scale, 4 or higher is good, and 7 or higher is particularly good. Furthermore, from the viewpoint of suppressing problems during printing, the interlayer strength in the MD direction is preferably 90 gf / 15 mm or more, more preferably 100 gf / 15 mm or more, and even more preferably 110 gf / 15 mm or more.

[0012] The basis weight of the antibacterial paper according to the present invention is not particularly limited, but for example, 25 to 500 g / m² 2 35-300g / m 2 The basis weight can be set to 40-250. In other embodiments, the basis weight of the antibacterial paper can be, for example, 45-100 g / m². 2may also be, 50 to 90 g / m 2 or 55 to 80 g / m 2 may also be.

[0013] The antibacterial paper according to the present invention preferably has a specific air permeability of 1.4 or more, more preferably 3.0 or more and 5.0 or more. Further, the antibacterial paper according to the present invention preferably has a breaking length in the CD direction of 3.0 km or more, more preferably 4.0 km or more and 4.5 km or more. If the specific air permeability or the breaking length is too low, there is a risk of paper breakage during the manufacture of the antibacterial paper.

[0014] The ash content in the paper of the antibacterial paper according to the present invention can be set as appropriate. For example, it can be 0.1% by weight or more and 40% by weight or less, preferably 5% by weight or more and 30% by weight or less. If the ash content in the paper is higher than 30% by weight, the binding between fibers may be inhibited by the fillers in the paper, and there is a risk that the paper lacks firmness and strength. The ash content in the paper is measured in accordance with JIS-P8252.

[0015] In one aspect, the antibacterial paper according to the present invention is an uncoated paper having no pigment coating layer, and may be an uncoated high-quality paper. Base paper The base paper used in the present invention comprises pulp raw materials. There are no particular restrictions on the pulp raw materials used; in addition to wood pulp, non-wood pulps such as bamboo pulp, linter pulp, hemp, bagasse, kenaf, esparto grass, and straw, semi-synthetic fibers such as rayon and acetate, and synthetic fibers such as polyolefins, polyamides, and polyesters can be used. Specifically, mechanical pulp (MP), deinked pulp (DIP, also called recycled paper pulp), hardwood kraft pulp (LKP), softwood kraft pulp (NKP), etc., which are commonly used as papermaking raw materials, can be suitably used, and one or more of these may be blended as appropriate. These pulps may be unbleached pulp or bleached pulp that has been bleached by one or more means. Examples of mechanical pulps include wood pulp (GP), refined wood pulp (RGP), thermomechanical pulp (TMP), chemothermetic pulp (CTMP), chemigland pulp (CGP), and semi-chemical pulp (SCP). Deinking pulp can be made from sorted waste paper such as fine paper, medium-grade paper, lower-grade paper, newspapers, flyers, and magazines, or unsorted waste paper containing a mixture of these, or from office waste paper including copy paper, thermal paper, and carbonless paper, as well as confidential waste paper and paper cups. There are no particular limitations on the base paper used in this invention. For example, copy paper, newspaper, medium-grade paper, liners, and core paper can be used. In one embodiment, the base paper according to the present invention is fine paper, and only chemical pulp is used as the pulp for the base paper.

[0016] In the base paper used in the present invention, various internal additives may be added as long as they do not inhibit the effects of the present invention. Examples of internal additives include, but are not limited to, inorganic chemicals such as aluminum sulfate (aluminum sulfate), polyaluminum chloride, sulfuric acid, hydrochloric acid, sodium hydroxide, sodium hydrogen carbonate, etc., and organic chemicals such as polyacrylamide-based polymers, polyvinyl alcohol-based polymers, oxidized starch, esterified starch, cationized starch, and various other modified starches, styrene-butadiene copolymers, latex, adhesives such as vinyl acetate; cellulose derivatives such as carboxymethyl cellulose, hydroxyethyl cellulose; internal paper strength enhancers such as urea-formaldehyde resin, melamine-formaldehyde resin; internal sizing agents such as rosin sizing agents, AKD sizing agents, ASA sizing agents, petroleum sizing agents, neutral rosin sizing agents; aluminum sulfate, yield improvers, yield aids, ultraviolet inhibitors, anti-fading agents, drainage improvers, coagulants, bulking agents, pH adjusters, slime control agents, colorants (dyes, pigments), and fluorescent dyes may be added. Furthermore, various cellulose nanofibers and microfibrillated cellulose may be used as internal additives.

[0017] The base paper used in the present invention can be filled with commonly used fillers, for example, one or more inorganic fillers or organic fillers can be used. Examples of inorganic fillers include, for example, heavy calcium carbonate, light calcium carbonate, calcium sulfite, gypsum, talc, kaolin, engineered kaolin, calcined kaolin, white carbon, amorphous silica, delaminated kaolin, diatomaceous earth, magnesium carbonate, titanium dioxide, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, zinc hydroxide, papermaking sludge, recycled inorganic particles from deinking flocs, etc. Examples of organic fillers include, for example, urea formaldehyde resin, vinyl chloride resin, polystyrene resin, urea / formaldehyde resin, melamine resin, styrene / butadiene copolymer resin, phenolic resin, plastic hollow particles, etc.

[0018] The base paper of the present invention can be manufactured by known methods. For example, the pulp mixed with the above raw materials is appropriately diluted, and after removing foreign matter with a screen or cleaner as necessary, it is sprayed from the headbox of the paper machine onto the papermaking wire to form wet paper. The base paper of the present invention can be manufactured using various paper machines, such as long-screen, cylinder-screen, multi-cylinder cylinder-screen, short-screen, and twin-wire paper machines. Examples of twin-wire paper machines include gap formers and on-top formers. In addition, the base paper may be manufactured using crescent formers or Yankee dryer type paper machines. The conditions in the pressing and drying processes after papermaking can be adjusted as appropriate.

[0019] Furthermore, the papermaking conditions for the base paper may be either neutral or acidic. Specifically, in this invention, the pH of the pulp during papermaking is preferably 3.0 to 9.0, and more preferably 4.0 to 8.0.

[0020] Coating (coating process) In this invention, in order to impart antibacterial properties, a layer (antibacterial layer) containing at least an antibacterial agent and a polysaccharide is provided on the base paper. In this invention, the amount of antibacterial layer applied (coating amount) is determined appropriately according to the surface strength required of the paper, and is not particularly limited, but for example, 0.1 to 10 g / m² on both sides. 2 It can be in the range of 0.5~5.0g / m 2 Preferably, 1.0 to 3.0 g / m 2 This is preferable. If the amount applied is excessive, the absolute amount of moisture increases, which increases the drying load and can easily lead to drying failure.

[0021] The weight ratio of the antibacterial agent to the polysaccharide can be, for example, 2:1 to 1:200, preferably 1:1 to 1:150, and may also be 1:2 to 1:100 or 1:3 to 1:50. (Antibacterial agent) In this invention, an antibacterial agent is applied to the base paper, but there are no restrictions on the antibacterial agent used; one antibacterial agent may be used alone, or two or more antibacterial agents may be used in combination. In this invention, an antibacterial agent refers to a drug that can impart antibacterial properties, and commercially available antibacterial agents, disinfectants, etc., can be used. For example, a drug that has both antibacterial and antiviral properties can be used as an antibacterial agent.

[0022] Preferred antimicrobial agents include surfactant-based antimicrobial agents, such as nonionic surfactants, cationic surfactants, and anionic surfactants, which can be used without limitation. Examples of nonionic surfactant antimicrobial agents include glycerin fatty acid esters and polyoxyethylene alkyl ethers; examples of cationic surfactant antimicrobial agents include ethoxysilane-based and alkyl quaternary ammonium salts, alkyldimethylbenzylammonium chloride, benzalkonium chloride, and benzethonium chloride; examples of anionic surfactant antimicrobial agents include linear alkylbenzene sulfonate sodium; and examples of amphoteric surfactant antimicrobial agents include alkyldiaminoethylglycine chloride and alkylpolyaminoethylglycine. Examples of commercially available surfactant-based antibacterial agents include Kokinstar D-125, Poem DL-100, Lipocard CB-50, Sanizol B-50, Emulgen 106, Anhitor 20N, Neoperex G-15, Amolden GR-150, Amolden V-500HP, Poem M-200, Nikkanon RB, Nikkanon RB-40 (quaternary ammonium salt), QB-2500, QC-2500, Lipocard 210-80E, Botanicle (registered trademark), REZOMA, Air Heal, Karaseed, Keisanit (registered trademark), Best Clean Mind, Mydol 10, Mydol 12, Kotamin 24P, Kotamin 86W, NS Soap, OS Soap, and HYP-KK171.

[0023] In this invention, non-surfactant organic antibacterial agents and inorganic antibacterial agents can be used, and hybrid antibacterial agents combining organic and inorganic antibacterial agents can also be used.

[0024] Examples of organic antimicrobial agents include ethylene oxide, glutaraldehyde, orthophthalaldehyde, cresol, chitosan, hinokitiol, mustard extract, iodine-based agents such as povidone-iodine, biguanide-based agents such as chlorhexidine, dye-based agents such as acrinol, polyphenol-based, benzimidazole-based, phthalimide-based, isotisolone-based, pyridine-based, and nitrile-based antimicrobial agents.

[0025] As inorganic antibacterial agents, for example, silver-based antibacterial agents, copper-based antibacterial agents, or zinc-based antibacterial agents can be used, and silver-based antibacterial agents are preferred from the viewpoint of safety. As for silver-based antibacterial agents, there are no particular restrictions as long as it is an inorganic compound supporting silver ions, but specifically, examples include inorganic adsorbents such as activated carbon, activated alumina, and silica gel, and inorganic ion exchangers such as zeolite, hydroxyapatite, zirconium phosphate, titanium phosphate, and potassium titanate. As for copper-based antibacterial agents, there are no particular restrictions as long as it is an inorganic compound supporting copper ions, but specifically, examples include inorganic adsorbents such as activated carbon, activated alumina, and silica gel, and inorganic ion exchangers such as zeolite, hydroxyapatite, zirconium phosphate, titanium phosphate, and potassium titanate. As for zinc-based antibacterial agents, there are no particular restrictions as long as it is an inorganic compound supporting zinc ions, but specifically, examples include inorganic adsorbents such as activated carbon, activated alumina, and silica gel, and inorganic ion exchangers such as zeolite, hydroxyapatite, zirconium phosphate, titanium phosphate, and potassium titanate. When using zeolite-based antibacterial agents, antibacterial zeolites obtained by substituting some of the ion-exchangeable metals in the zeolite with at least one metal selected from silver, copper, and zinc are preferably used.

[0026] Examples of commercially available inorganic antibacterial agents include Silver Bullet, Cozy Pack Air, AG Alpha® CF-01, AG Alpha® CF-04, Novalon, Kesmon, Allerimove, MP-102SVC13, Silver Ace, Zeomic, Lock-3, and Ion Pure.

[0027] (polysaccharide) In this invention, a surface coating liquid containing polysaccharides such as starch as an adhesive (binder) is applied to the base paper, thereby providing surface strength, water resistance, printability, and other properties.

[0028] The polysaccharides are not particularly limited as long as they can be used as an adhesive, and examples include starch, cellulose, chitin, glycogen, agarose, and pectin. For starch, for example, corn starch, tapioca starch, potato starch, wheat starch, and rice starch can be suitably used.

[0029] Furthermore, in the present invention, starch that has been modified in various ways by known methods may be used. Modification methods may include, for example, enzymatic denaturation using α-amylase, esterification, cationization, acetylation, aldehyde formation, and hydroxyethylation. Esterification may include acetic acid esterification and phosphate esterification, and etherification may include carboxyether formation and hydroxyether formation. In order to fully exhibit the aging stability improvement effect of the present invention, it is preferable to use self-modified starch that has been made low viscosity by modifying acetylated tapioca starch or the like in a paper mill, in particular APS-modified starch which has been thermochemically modified by adding ammonium persulfate (APS) as an oxidizing agent, or enzymatically modified starch which has been hydrolyzed using α-amylase. Self-modified starch which has been modified in a paper mill is easy to adjust viscosity at the manufacturing site and is also cost-effective.

[0030] The adhesive used for surface treatment is not particularly limited as long as it contains at least polysaccharides, but in addition to starch, for example, cellulose derivatives such as carboxymethylcellulose, hydroxyethylcellulose, methylcellulose, and cellulose nanofibers, fine fiber cellulose, guar gum, xanthan gum, gum arabic, dextrin, alginic acid, hyaluronic acid, xylan, glucomannan, carrageenan, polyacrylamide, polyvinyl alcohol, modified alcohols such as carboxyl-modified polyvinyl alcohol and acetoacetylated polyvinyl alcohol, latex, styrene-butadiene copolymers, polyvinyl acetate, vinyl chloride-vinyl acetate copolymers, polyvinyl chloride, polyvinylidene chloride, and polyacrylic acid esters may be used individually or in combination of two or more. In the present invention, it is preferable that the proportion of polysaccharides such as starch in the adhesive in the antibacterial layer is 50% or more. More preferably, it is 80% or more. If it is less than 50%, the viscosity of the surface treatment liquid will decrease, which may cause adverse effects such as deterioration of strength and hardness, and the cost will also increase.

[0031] In the present invention, a sizing agent may be incorporated into the antibacterial layer for the purpose of enhancing sizing properties. When using a sizing agent, various types of sizing agents can be used, but for example, surface sizing agents such as styrene-based sizing agents, olefin-based sizing agents, acrylate-based sizing agents, styrene-acrylic sizing agents, and cationic sizing agents may be used. When using a surface sizing agent, the solid content concentration in the surface treatment solution is preferably 0.05 to 5% by weight, and more preferably 1 to 3% by weight.

[0032] Furthermore, the surface treatment liquid (coating liquid) of the present invention may optionally contain various auxiliary agents such as dispersants, thickeners, water-retaining agents, defoaming agents, water-resistant agents, colorants, and conductive agents. The equipment used to apply the surface treatment solution (coater) is not particularly limited, and any known equipment can be used. Suitable coaters include pound-type size presses, film transfer type gate roll coaters and lot metering size presses, as well as blade coaters, spray coaters, and curtain coaters. Furthermore, so-called calender sizing can be performed using an applicator or spray in a calender or supercalender. Additionally, the coating solution can be sprayed in front of a Yankee dryer.

[0033] In the present invention, another layer may be provided in addition to the layer containing polysaccharides and antibacterial agents. For example, a layer containing polysaccharides and antibacterial agents may be provided after a clear coating layer or a pigment coating layer has been applied.

[0034] After the clear coating layer is applied to the base paper, the paper may be fed through a publicly known finishing device, such as a supercalender, gloss calender, soft calender, or high-temperature soft nip calender, to perform product finishing, or it may be left untreated or bypassed. [Examples]

[0035] The present invention will be illustrated below with specific examples, but the present invention is not limited to the following examples. In this specification, unless otherwise specified, "parts" refers to "parts by weight" and "%" refers to "% by weight," and numerical ranges are described including their endpoints.

[0036] Manufacturing of antibacterial paper (1) Samples 1-14 600g of coating solution was prepared by mixing the raw materials in the following proportions. Specifically, the raw materials were mixed with water (ion-exchanged water) at a liquid temperature of 40°C in a 1L container, and the mixture was stirred with a spatula for 3 minutes to prepare the coating solution.

[0037] [Table 1-1]

[0038] [Table 1-2]

[0039] Next, on both sides of the base paper for fine paper without any pigment coating and clear coating (basis weight: about 60 g / m 2 , neutral paper), each coating solution was applied by pond coating using a Hisilacopy machine (One Step Processor S-III type, Daito Co., Ltd.), and then air-dried for one day and night to produce fine paper. (2) Samples 15 to 17 Antibacterial agents and surface sizing agents were added to 2000 kg of a 4% starch solution at the following ratios to prepare coating solutions 13 to 15.

[0040] [Table 2]

[0041] Next, on both sides of the base paper for fine paper without any pigment coating and clear coating (basis weight: 65.1 g / m 2 , neutral paper), each coating solution was applied using a gate roll coater to produce fine paper.

[0042] Evaluation of antibacterial paper The following evaluations were performed on the produced fine paper. When performing the evaluations, the samples were left standing overnight in a thermo-hygrostat (25°C, humidity 50%) for conditioning before use. (1) Coating amount The basis weights before and after coating were measured, and the coating amount (g / m 2 ) was calculated from these basis weights. (2) Gloss after printing The prepared high-quality paper was printed using an RI printing press (manufactured by Akira Seisakusho) with an ink volume of 1.5 cc (Beni TV20, manufactured by DIC Corporation) and a printing speed of 100 rpm. After drying overnight in a forced-air dryer, the ink density of the printed area was measured using a Macbeth densitometer (RD918, KOLLMORGEN) and a 75° gloss meter (GM-26PRO / TOUCH, Murakami Color Technology Laboratory) to evaluate the post-print gloss. A gloss of 30% or higher is considered good, and 65% or higher is considered particularly good. (3) Interlayer strength A 20cm x 1.5cm sample was prepared using a punching machine (manufactured by Kumagai Riki Kogyo Co., Ltd.), and the interlaminar strength was measured using a universal testing machine (RTG-1210, Orientec Co., Ltd.). An interlaminar strength of 90gf / 15mm or higher in the MD direction is considered good, and 100gf / 15mm or higher is considered particularly good. (4) Specific air permeability The air permeability (air resistance) of the prepared high-quality paper was measured using the Ogakuen-type air permeability and smoothness tester (manufactured by Asahi Seiko Co., Ltd.) in accordance with JAPAN TAPPI No. 5. The specific air permeability was calculated by dividing the air permeability value by the basis weight of each sample. A specific air permeability of 1.4 or higher is considered good, and 3.0 or higher is considered particularly good. (5) Tearing length Samples measuring 20 cm x 1.5 cm were prepared using a punching machine (manufactured by Kumagai Riki Kogyo Co., Ltd.), and tensile strength was measured using a tensile strength tester (horizontal tensile tester, manufactured by Kumagai Riki Kogyo Co., Ltd.) in accordance with JIS P-8113. The tear length was determined by dividing the tensile strength value by the basis weight of each sample. A tear length of 4.0 km or more in the CD direction was considered good, and 4.5 km or more was considered particularly good. (6) Antibacterial activity Based on the antimicrobial testing method of JIS L1902, a 2.8 cm x 2.8 cm sample of high-quality paper was used as the test piece. A test solution containing Staphylococcus aureus (test bacterial concentration: 1.0 x 10⁻¹⁴) was used. 5 ~3.0×10 50.2 mL of CFU / mL was inoculated onto the surface of the test specimen and incubated at 37°C for 18-24 hours. Immediately after inoculation and after incubation, 20 mL of wash solution was added to wash the test bacteria from the specimen, and the number of viable bacteria in the wash solution was measured. The antibacterial activity value (A) was calculated using the following formula. As a control sample, washed cotton cloth (cotton 3-1) was used (JIS L0803).

[0043] [ka]

[0044] (7) Antiviral activity For samples 1, 3, 4, 7, 16, and 17, the antiviral activity value (Mv) was measured according to JIS L1922:2016. The weight of the sheet used for the test was 0.4g, and influenza virus (H3N2, ATCC VR-1679) was used as the test virus.

[0045] [Table 3-1]

[0046] [Table 3-2]

[0047] As is clear from the table, simply coating a paper substrate with starch did not impart antibacterial properties (Sample 1), and simply coating it with an antibacterial agent resulted in low paper strength and poor gloss (printability) after printing (Sample 2).

[0048] On the other hand, by using an antibacterial agent and starch in combination based on the present invention, paper with sufficient strength while possessing antibacterial properties was obtained. Furthermore, the printability of certain antibacterial agents was improved when combined with starch (Samples 3-7, 12, 14).

[0049] Furthermore, samples 3, 4, 7, 16, and 17 were confirmed to possess excellent antiviral activity.

Claims

1. A method for producing antibacterial paper, comprising applying an antibacterial agent and a polysaccharide to a base paper, wherein the base paper is high-quality paper.

2. The method according to claim 1, wherein a coating solution containing an antibacterial agent and a polysaccharide is applied to a base paper.

3. The method according to claim 1 or 2, wherein the polysaccharide contains starch and the antibacterial agent contains a surfactant.

4. The method according to any one of claims 1 to 3, wherein the coating solution is applied by a pounding method or a film transfer method.

5. Antibacterial paper having a layer containing an antibacterial agent and polysaccharides on the base paper, and the base paper being high-quality paper.

6. The antibacterial paper according to claim 5, wherein the weight ratio of the antibacterial agent to the polysaccharide is 2:1 to 1:

200.

7. The antibacterial paper according to claim 5 or 6, wherein the polysaccharide contains starch and the antibacterial agent contains a surfactant.

8. The antibacterial paper according to any one of claims 5 to 7, which is a high-quality paper that does not have a pigment coating layer.

9. The antibacterial paper according to any one of claims 5 to 8, which is equipped with antiviral activity.

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